JP6742501B2 - Load measuring system - Google Patents

Description

The present invention relates to a load measuring system that measures loads applied by a plurality of holding units included in a mounting head of a mounting machine.

In a mounting machine that mounts electronic components (hereinafter, simply referred to as “components”) on a circuit board (hereinafter, sometimes simply referred to as “substrates”), suppresses damage to components and electrical connection failures. Therefore, it is required to set the load for pressing the component against the substrate to an appropriate value. Further, due to the recent high integration, miniaturization, thinning of components, etc., it is desired to manage the load pressing the components with higher accuracy. On the other hand, there is a load measuring device that measures the load of pressing the component by the suction nozzle of the mounting head when the component is mounted on the board (for example, Patent Document 1).

A load measuring device disclosed in Patent Document 1 (in the literature, “mounting load measuring device”) is a load cell that detects a load applied by a suction nozzle, and a data logger that measures the load based on a detection result of the load cell. Equipped with. The load measuring device is formed according to the width of the transfer path for transferring the board in the mounting machine. Then, the load measuring device is transported on the transport path similarly to the substrate, and measures the load at a predetermined mounting position.

JP, 2015-220294, A

The above load measuring device is collected after being carried out from the mounting machine, is connected to a personal computer, and reads the measured data. Here, as the mounting work becomes more efficient and faster, the mounting head is provided with a plurality of suction nozzles. In this case, from the viewpoint of work efficiency, it is preferable to collectively measure the loads of the plurality of suction nozzles in one transfer work (measurement work). Further, the personal computer collectively reads the load data corresponding to each of the plurality of suction nozzles from the load measuring device, for example.

On the other hand, the individual suction nozzles may cause an abnormal operation of the stack or the like in the measurement work. The stack here refers to a state in which the suction nozzle cannot be operated smoothly due to, for example, accumulation of dust or catching of a member. When the stack occurs, the suction nozzle does not reach the load measuring device in the measurement work, or even if the suction nozzle reaches the load measuring device, only a very small load can be detected on the load measuring device side. If the suction nozzles do not reach, the number of load data stored in the load measuring device becomes smaller than the number of suction nozzles. In addition, the load data having an extremely small load is likely not to be processed as the load data by the analyzing personal computer side. In addition, the personal computer can determine which suction nozzle, out of the plurality of suction nozzles, caused the stack and could not measure the load data, only by determining the content of the load data indicating the waveform of the load and the like. Is difficult As a result, there is a problem that the suction nozzle and the load data cannot be properly associated with each other.

The present invention has been made in view of such an actual situation, and an object of the present invention is to associate a plurality of holding units with a plurality of load data even if the load measurement fails due to an operation abnormality. It is to provide a load measuring system capable of performing.

In order to solve the above-mentioned problems, the present specification is arranged in a mounting machine including a mounting head that mounts a component having a plurality of holding parts on a substrate, the components being held by the plurality of holding parts. A load measuring device that measures a load applied to the component by the plurality of holding parts by collision or pressing, and an analysis device, the analysis device, each of the plurality of holding parts in the load measurement work. A first acquisition process for acquiring timing information that is information regarding the timing of operation, and a second acquisition for acquiring a plurality of load data that is a result of measuring the load in each of the plurality of holding units from the load measuring device. Process, based on the timing information acquired in the first acquisition process, by specifying one of the holding unit corresponding to each of the plurality of load data acquired in the second acquisition process, the plurality of Disclosed is a load measuring system that executes load data and a process of associating the plurality of holding units with each other.

According to the present disclosure, the analysis device acquires timing information regarding the timing at which each of the plurality of holding units operates in the load measuring operation. The analysis device associates a plurality of load data acquired from the load measurement device with a plurality of holding units based on the timing information. As a result, even if the load measurement fails in some holding units due to an abnormal operation of the stack or the like, and the load data is lost, the analyzer can hold multiple holdings based on the timing information of the actual operation. A part and a plurality of load data can be associated with each other.

It is a schematic diagram which shows the structure of the board|substrate work system. It is a top view of a mounting machine. It is sectional drawing in the state which has arrange|positioned the board|substrate in the working position of a mounting machine. It is a block diagram which shows the electric constitution of a mounting machine. It is a top view of a load measuring device. It is sectional drawing in the state which has arrange|positioned the load measuring device in the working position of a mounting machine. It is a block diagram of a load measuring device. It is a flow chart which shows a series of processing procedures from generation of control data for load measurement to analysis of load data. It is a figure which shows several load data. It is a figure which shows several load data when a stack generate|occur|produces.

Hereinafter, the working system 10 for a board will be described in detail as an example of an embodiment of the load measuring system of the present application with reference to the drawings.

(Structure of work system for board)
FIG. 1 shows a schematic configuration of a board-facing work system 10 including a mounting machine 11 of the present embodiment. The board-to-board work system 10 is a system for mounting components on a circuit board (hereinafter, referred to as “board”) CB. The board working system 10 includes one component mounting line 12, a production management computer 18, an analysis computer 19, and a load measuring device 81. The board CB is conveyed from the left side to the right side in FIG. 1 on the component mounting line 12, and the work is performed by various devices. The component mounting line 12 is configured by connecting a plurality of (four in this embodiment) mounters 11, a solder printer 13, an inspection device 14, a reflow device 15, and a board handling device 17. .. The respective devices and the like are arranged in a row in a state of being adjacent to each other, and are collectively controlled by the production management computer 18. In the description below, the direction in which the devices are arranged will be referred to as the X-axis direction, and the direction orthogonal to the direction and parallel to the plane of the substrate CB will be referred to as the Y-axis direction.

The solder printer 13 prints a solder paste on the board CB. The mounting machine 11 mounts components on the board CB on which the solder paste is printed. The details of the mounting machine 11 will be described later. The inspection device 14 inspects the state of components mounted on the board CB, the presence or absence of foreign matter, and the like. The reflow device 15 heats and remelts the paste-like solder, and then cools and solidifies the solder to complete mounting of the component. The board handling device 17 is provided upstream and downstream of the mounter 11 and the like in the component mounting line 12. Each of the substrate handling devices 17 carries the substrate CB to the next device, makes it stand by, or turns it upside down.

The production management computer 18 is mainly composed of a computer including a CPU, a RAM and the like. The production management computer 18 is connected to the mounting machine 11 and the like via the network NW1. The production management computer 18 transmits control data D1 for controlling the operation of the mounting machine 11 or the like to the mounting machine 11 or the like. The mounting machine 11 and the like execute mounting work and the like based on the control data D1 received from the production management computer 18. The production management computer 18 stores a plurality of control data D1 and various data for generating the control data D1. In the control data D1, for example, the identification information (serial number) of the mounting machine 11, the identification information of the mounting head 24 described later, the nozzle type of the suction nozzle 70, and the load applied from the suction nozzle 70 to the component are feedback-controlled. Information such as the target load value and load width to be used is included.

An analysis computer 19 is connected to the production management computer 18 via the network NW2. The analysis computer 19 is mainly composed of a computer including a CPU, a RAM, etc., and has an operation unit 19A and a display unit 19B. The operation unit 19A is, for example, an input device such as a keyboard or a mouse. The display unit 19B is, for example, a display that displays various information.

The user can change the content of the control data D1 stored in the production management computer 18 via the network NW2, for example, by operating the operation unit 19A of the analysis computer 19. Further, the user can transmit the control data D1 from the production management computer 18 to the specific mounting machine 11 or the like by operating the operation unit 19A. As a result, the user operates the operation unit 19A of the analysis computer 19 to generate the control data D1 for mounting work for measuring the load, and to transmit the generated control data D1 to the mounting machine 11 to be measured. Processing can be performed.

Further, the analysis computer 19 of the present embodiment acquires the log data D2 from the mounting machine 11 whose load is measured by the load measuring device 81 described later via the production management computer 18 (first acquisition process). The log data D2 is, for example, various information indicating the operation result of the mounting machine 11, and includes timing information regarding the timing at which the suction nozzle 70 operates when measuring the load. The log data D2 is transferred from the mounting machine 11 to the analysis computer 19 via the network NW1, the production management computer 18, and the network NW2.

Further, the analysis computer 19 of the present embodiment has an external interface 19C for connecting with the load measuring device 81. The external interface 19C is an interface for connecting to the external interface 101 (see FIG. 6) of the load measuring device 81. The external interfaces 19C and 101 are not particularly limited in standard and the like, but for example, an interface compliant with USB (Universal Serial Bus) standard can be adopted. The analysis computer 19 may have a configuration capable of wireless communication with the load measuring device 81.

The analysis computer 19 acquires the measurement data D3 obtained by measuring the load from the load measuring device 81 via the external interface 19C (second acquisition process). The measurement data D3 includes a plurality of load data corresponding to a plurality of suction nozzles 70 of the mounting head 24 described later. The analysis computer 19 correlates and analyzes a plurality of load data included in the measurement data D3 and a plurality of suction nozzles 70 based on the log data D2, and displays the analysis result on the display unit 19B. The details of the load measuring device 81 will be described later.

(Structure of mounting machine)
FIG. 2 shows a plan view of the mounting machine 11. As shown in FIG. 2, the mounting machine 11 includes a carrier device 20, a mounting head moving device (hereinafter, may be abbreviated as “moving device”) 22, a mounting head 24, and a supply device 26. The transfer device 20 has a conveyor 31 extending in the X-axis direction. The substrate CB is supported by the conveyor 31 and is transported in the X-axis direction. FIG. 3 shows a working position of the mounting machine 11 and shows a cross-sectional view taken along a plane perpendicular to the X-axis direction. As shown in FIG. 3, the conveyor 31 has a conveyor belt 33, a stopper 35, and a clamper 36. Conveyor belts 33 are provided in a set spaced apart by a predetermined distance in the Y-axis direction, and circulate with the board CB placed on the board, and move the board CB to a predetermined work position (for example, the position shown in FIG. 2). Transport. The clamper 36 is provided at a position facing the stopper 35 in the up-down direction with the substrate CB interposed therebetween in the working position. The conveyor 31 drives the electromagnetic motor 63 (see FIG. 4) to rotate the conveyor belt 33 and convey the substrate CB to the work position, and then raises the clamper 36. The substrate CB is sandwiched between the clamper 36 and the stopper 35, and is fixedly held at the working position.

Further, at the working position of the mounting machine 11, an elevating table 43 that can be moved up and down by a driving unit 41 (for example, an air cylinder) is provided. A backup base 44 that is replaceable with respect to the lift table 43 is provided on the lift table 43. A plurality of backup pins 46 are provided upright on the upper surface of the backup base 44. When mounting the component, the mounting machine 11 drives the drive unit 41 to raise the elevating table 43 and bring the backup pin 46 into contact with the lower surface of the substrate CB whose position is held by the stopper 35 and the clamper 36.

Further, as shown in FIG. 2, the moving device 22 has an X-axis direction slide mechanism 50 and a Y-axis direction slide mechanism 52. The X-axis direction slide mechanism 50 includes an X-axis slider 56 provided on the base 54 so as to be movable in the X-axis direction. The X-axis slider 56 is moved to an arbitrary position in the X-axis direction by driving an electromagnetic motor 64 (see FIG. 4). Further, the Y-axis direction slide mechanism 52 has a Y-axis slider 60. The Y-axis slider 60 is provided on the side surface of the X-axis slider 56 so as to be movable in the Y-axis direction. The Y-axis slider 60 moves to an arbitrary position in the Y-axis direction by driving an electromagnetic motor 65 (see FIG. 4). The mounting head 24 is attached to the Y-axis slider 60. With such a structure, the mounting head 24 is moved to an arbitrary position on the base 54 by the moving device 22. The mounting head 24 is attachable to and detachable from the Y-axis slider 60, and can be replaced with a head suitable for the work.

The mounting head 24 mounts a component on the board CB. The mounting head 24 has a plurality of (only one is shown in FIG. 2) suction nozzles 70 provided on the lower surface. The plurality of suction nozzles 70 communicate with the positive/negative pressure supply device 66 (see FIG. 4) via the negative pressure air and positive pressure air passages. Each suction nozzle 70 sucks and holds a component by negative pressure and separates the held component by positive pressure. Further, the mounting head 24 has a nozzle elevating device 67 (see FIG. 4) that elevates and lowers the plurality of suction nozzles 70. The mounting head 24 changes the vertical position of the suction nozzle 70 holding the component by the nozzle lifting device 67. The suction nozzle 70 is attachable to and detachable from the mounting head 24, and can be replaced with a suction nozzle 70 or another holding unit (chuck or the like) according to a component to be held. Further, the mounting head 24 may have a configuration in which a plurality of suction nozzles 70 are arranged in an annular shape, or may have a configuration in which a plurality of suction nozzles 70 are arranged in one direction. Further, the mounting head 24 may include a device that collectively moves the plurality of suction nozzles 70, or a device that individually rotates the plurality of suction nozzles 70.

The supply device 26 is a feeder type supply device and has a plurality of tape feeders 72. The tape feeder 72 accommodates the taped parts in a wound state. The tape feeder 72 feeds the taped parts by the feeding device 68 (see FIG. 4) and supplies the parts to the feeding position.

Further, FIG. 4 shows an electrical configuration of the mounting machine 11. As shown in FIG. 4, the mounting machine 11 has a control device 140. The control device 140 has a controller 141 and a plurality of drive circuits 142. The controller 141 is connected to the plurality of drive circuits 142. The plurality of drive circuits 142 are connected to the electromagnetic motors 63, 64, 65, the drive unit 41, the positive/negative pressure supply device 66, the nozzle elevating device 67, and the feeding device 68 described above. The controller 141 includes a CPU 141A, a ROM 141B, a RAM 141C, a flash memory 141D, etc., and is mainly composed of a computer. Various programs and the like are stored in the ROM 141B. The CPU 141A executes a program stored in the ROM 141B, and controls each device of the mounting machine 11 via the drive circuit 142. The RAM 141C is used as a working memory when the CPU 141A executes programs and the like. The flash memory 141D stores temporary data (errors, etc.) related to the mounting work. The flash memory 141D of the present embodiment stores log data D2 indicating the operation results of the above-described mounting work and load measuring work.

(Mounting work by mounting machine)
The control device 140 of the mounting machine 11 performs the component mounting work on the board CB with the above-described configuration. More specifically, the control device 140 carries the substrate CB carried in from the substrate handling device 17 on the upstream side to the working position by the carrying device 20. The stopper 35 and the clamper 36 fixedly hold the substrate CB in the working position. Further, the tape feeder 72 sends out the tape-formed component and supplies the component to the supply position. The mounting head 24 moves above the supply position of the tape feeder 72, and sucks and holds the component by the suction nozzle 70. The mounting head 24 moves above the substrate CB arranged at the work position, and mounts the component held by the suction nozzle 70 on the substrate CB. At this time, the control device 140 of the present embodiment feedback-controls the load applied to the component from the suction nozzle 70. The control device 140 calculates the load applied from the suction nozzle 70 to the component based on, for example, the current value or voltage value of the drive power supplied from the amplifier of the drive circuit 142 to the electromagnetic motor of the nozzle lifting device 67. The control device 140 controls the drive power supplied from the drive circuit 142 to the nozzle elevating device 67 so that the load applied to the components reaches or matches a preset target load value (for example, 1N). .. As a result, the load applied to the component from the suction nozzle 70 is controlled, and the occurrence of component damage such as component cracking is suppressed.

(Structure of load measuring device)
Next, the configuration of the load measuring device 81 of this embodiment will be described. FIG. 5 shows a plan view of the load measuring device 81 of this embodiment. FIG. 6 is a cross-sectional view of the load measuring device 81, showing a state in which the load measuring device 81 is arranged at the working position of the mounting machine 11. That is, FIG. 6 corresponds to FIG. 3 and shows a state in which the load measuring device 81 is arranged in place of the substrate CB. Further, FIG. 7 shows an electrical configuration of the load measuring device 81. Incidentally, in FIG. 6, the backup base 44 is in a state in which the backup pin 46 is removed. Further, in the following description, the position of each member of the load measuring device 81 will be described using the direction (X-axis direction and Y-axis direction) when the load measuring device 81 is conveyed. Further, when the load measuring device 81 is configured to be thin, the load measuring device 81 may be conveyed by the conveyor 31 while the backup pin 46 is attached to the backup base 44.

As shown in FIGS. 5 and 6, the load measuring device 81 has a housing 83 and sandwiched plates 85 and 86 attached to the upper surface of the housing 83. The sandwiched plates 85 and 86 are provided at both ends of the upper surface 83A of the housing 83 in the Y-axis direction. The sandwiched plates 85 and 86 have a plate shape extending in the X-axis direction. The thickness of the sandwiched plates 85 and 86 in the vertical direction is the same as the thickness L1 of the substrate CB shown in FIG. 3 (for example, 2 mm). The conveyor belt 33 supports the lower surfaces of the sandwiched plates 85 and 86 that project outward in the Y-axis direction. The conveyor 31 conveys the load measuring device 81 with the sandwiched plates 85 and 86 placed on the conveyor belt 33. The width W2 of the load measuring device 81 along the Y-axis direction is substantially the same as the substrate width W1 (see FIG. 3) of the substrate CB.

As shown in FIG. 7, the load measuring device 81 includes a power source 91, a power switch 93, a remaining amount meter 94, a load sensor 95, a data logger 97, a measurement start switch 99, an external interface 101 and the like. doing. The power supply 91 is, for example, a rechargeable battery, and supplies a DC voltage V1 to the load sensor 95 and the data logger 97.

The power switch 93 is a switch that switches between starting and stopping the supply of the voltage V1 from the power source 91 to the load sensor 95 and the like. The power switch 93 is attached to the bottom surface 83E (see FIG. 6) of the housing 83. The power switch 93 is, for example, a slide switch, a tact switch (registered trademark), or the like, and outputs an ON/OFF signal S1 to the power source 91 according to a user operation. The power supply 91 starts or stops the supply of the voltage V1 to the load sensor 95 and the like according to the ON/OFF signal S1 from the power switch 93. The remaining amount meter 94 is attached to the bottom surface 83E of the housing 83. The remaining amount meter 94 is connected to the power source 91 and displays the remaining amount of the battery of the power source 91.

The load sensor 95 is a sensor that detects a load (such as a force pressing a component) pressed by the suction nozzle 70 of the mounting head 24. The load sensor 95 is, for example, a crystal piezoelectric load sensor, and is configured as a uniaxial sensor that detects only a vertical load. The load sensor 95 may be another type of load sensor such as a strain gauge type. The strain gauge type load sensor may not be able to detect the impact load (dynamic force) with higher accuracy than the quartz piezoelectric type sensor from the viewpoint of responsiveness. Therefore, the load sensor 95 is preferably a crystal piezoelectric type load sensor. Further, the load sensor 95 may be a multi-axis load sensor capable of detecting loads in a plurality of directions.

The load sensor 95 has a load input unit 95A attached to the upper surface 83A of the housing 83. As shown in FIG. 5, a measurement plate 83C is provided on the upper surface 83A at a position close to the sandwiched plate 86. The measurement plate 83C is formed with a through hole 83D penetrating in the vertical direction. The load input portion 95A has a substantially columnar shape and is vertically inserted through the through hole 83D.

Here, for example, the user does not set the component on the tape feeder 72 when measuring the load. Then, the mounting machine 11 drives the mounting head 24 based on the control data D1, and presses the load input portion 95A by the suction nozzle 70 that does not suction and hold the component. When the load input section 95A is pressed downward by the suction nozzle 70, the load sensor 95 causes a compressive stress to occur inside the quartz crystal piezoelectric element (not shown) due to the load, and performs analog detection according to the magnitude of the stress. The voltage V2 is output. The load sensor 95 outputs the detection voltage V2 to the data logger 97.

The load sensor 95 of this embodiment can measure, for example, a static load and a dynamic load. The static load referred to here is, for example, of the load applied to the load sensor 95 (the component or the board CB at the time of mounting) from the suction nozzle 70, which is a constant value that does not change over time. Further, the dynamic load is a load that changes with the passage of time among the loads applied to the load sensor 95 from the suction nozzle 70. Specifically, the dynamic load is, for example, a collision load generated when the suction nozzle 70 is brought into contact (collision) with the load input unit 95A. The static load is, for example, a pressing load generated when the suction nozzle 70 presses the load input portion 95A after the contact. The data logger 97 continuously records the dynamic load and static load (detection voltage V2) output from the load sensor 95 in this mounting operation. The quality of the load can be determined by analyzing whether or not the recorded dynamic load and static load (detection voltage V2) satisfy the withstand load condition of the substrate CB and components.

The measurement start switch 99 has a pressing switch 99A that can be operated by the suction nozzle 70. The pressure switch 99A is provided at a position close to the load input unit 95A (see FIG. 5). The measurement start switch 99 is turned off, for example, when the pressing switch 99A is not pressed by the suction nozzle 70, and outputs a low-level recording start signal S2 (see FIG. 7) to the data logger 97. Further, the measurement start switch 99 outputs a high-level recording start signal S2 to the data logger 97 when the pressing switch 99A is pressed down to a certain reference position by the suction nozzle 70, for example.

The data logger 97 does not store the detection voltage V2 input from the load sensor 95 while the low-level recording start signal S2 is input. Further, the data logger 97 records the detection voltage V2 for a predetermined time from the timing when the high level recording start signal S2 is input from the measurement start switch 99. This predetermined time is set according to the operation sequence of the plurality of suction nozzles 70, more specifically, the actual operation time and operation state when mounting the component on the board CB. For example, the mounting machine 11 first presses the pressing switch 99A with one of the plurality of suction nozzles 70, and then presses the load input unit 95A. The mounting machine 11 continuously presses the load input unit 95A while changing the suction nozzle 70. The predetermined time is set to the time required for the operation sequence of the plurality of suction nozzles 70. Then, the data logger 97 continuously records the detection voltage V2 output from the load sensor 95 for a predetermined time after the pressing switch 99A is pressed by the plurality of suction nozzles 70. The data logger 97 records the input detection voltage V2 and the measured time as measurement data D3. The measurement data D3 includes a plurality of load data obtained by measuring the loads of the plurality of suction nozzles 70. In the load measuring device 81 having the above-described configuration, it is possible to extremely reduce unnecessary data (load due to vibration during transportation) before and after the load measurement.

The external interface 101 is an interface for connecting to the analysis computer 19 described above. The external interface 101 is attached to the side surface 83B of the housing 83 (see FIG. 6). The user can operate the analysis computer 19 (operation unit 19A) connected to the load measuring device 81 via the external interface 101 to read the measurement data D3 from the data logger 97. Thereby, the user can analyze the measurement data D3 (a plurality of load data) and display the analysis result on the display unit 19B of the analysis computer 19. For example, the analysis computer 19 determines that the load applied from the suction nozzle 70 to the component is normal based on whether or not the maximum value of the measurement data D3 (value obtained by converting the detection voltage V2 into a load) is within a desired range. Or not.

In addition, as shown in FIG. 5, the upper surface 83A has two positions for detecting the accurate position of the load measuring device 81 fixed at the work position, in other words, the accurate positions of the load input unit 95A and the press switch 99A. Two fiducial marks 111 are provided. Further, a code portion 113 is provided on the upper surface 83A at a position close to the sandwiched plate 85. The code unit 113 is, for example, a two-dimensional code and is used to identify the load measuring device 81 from the board CB. The code unit 113 may be other identification information such as a bar code as long as it can identify the load measuring device 81 and the board CB.

The control device 140 of the mounting machine 11 images the fiducial mark 111 and the code portion 113 provided on the upper surface 83A of the load measuring device 81 with the camera 69 (see FIG. 4) provided on the mounting head 24, and an image Get the data. The control device 140 performs image processing on the image data of the fiducial mark 111, thereby performing accurate coordinate positions (positions in the X-axis direction and the Y-axis direction) of the positioned load measuring device 81, the pressing switch 99A, and the like. To detect.

(About measurement and analysis of load)
Next, a method of measuring the load by the load measuring device 81 and an analysis method by the analysis computer 19 will be described with reference to FIG. FIG. 8 shows a series of processing steps from generation of the control data D1 for load measurement to analysis of the measurement data D3 (load data). It should be noted that the procedure shown in FIG. 8 is an example, and can be appropriately changed according to the configuration of the work system 10 for a board.

First, in step 11 of FIG. 8 (hereinafter, simply referred to as “S”) 11, the user creates control data D1 for operating the mounting machine 11 of which load is to be measured, that is, control data D1 for measurement. .. For example, the user operates the operation unit 19A of the analysis computer 19 to create the control data D1. This control data D1 executes, for example, an operation (an operation that does not actually acquire) as if the component is acquired from the tape feeder 72 in which no component is set, and the work position (for example, the position shown in FIG. 2). It is the data for executing the mounting work for the load measuring device 81 fixed to. The load measuring device 81 presses the load input portion 95A by the plurality of suction nozzles 70 in accordance with this mounting work, and measures and stores the load.

Further, in the control data D1, a load applied from the suction nozzle 70 to the component or the board CB in the mounting work, that is, a load applied to the load measuring device 81 at the time of measurement is set. This load is, for example, a load width that indicates a range of a target load value to be a target and a load value to be allowed. The target load value and the load width are set based on the type of the board CB to be produced and the withstand load of the mounted components. As a result, the mounter 11 to be measured performs the mounting work within the range of the target load value and the load width. As a result, the quality of the load can be determined by comparing the measurement data D3 of the load measuring device 81, which will be described later, with the target load value of the control data D1.

In particular, the load measuring device 81 of the present embodiment does not have a means or a function for communicating with the mounting machine 11. Therefore, the measurement data D3 of the load measuring device 81 is data measured without receiving interference from the mounting machine 11. More specifically, since the load measuring device 81 cannot communicate with the mounting machine 11, there is no possibility of overwriting or rewriting the measurement data D3 from the mounting machine 11, and the load measuring apparatus 81 is physically assigned by the mounting machine 11. The load can be recorded as it is as the measurement data D3. Thereby, the objectivity of the measurement data D3 seen from the user can be secured and the reliability of the measurement data D3 can be improved.

Next, in S13, the user operates the analysis computer 19 to transmit the control data D1 from the production management computer 18 to the mounting machine 11 to be measured. For example, when the control device 140 of the mounting machine 11 receives the control data D1, it displays a screen for selecting whether or not to perform the mounting work for measurement on the display panel 11A (see FIG. 1). The display panel 11A is, for example, a capacitive touch panel. When the control device 140 receives an input from the user instructing the display panel 11A to execute, the control device 140 starts the mounting work based on the control data D1.

When the input from the user to the display panel 11A is accepted in S13, the control device 140 starts the load measuring process (S15). The mounting machine 11 displays on the display panel 11A, for example, a message requesting that the load measuring device 81 be loaded from the upstream side of the component mounting line 12 shown in FIG. In the load measuring process of S15, the user turns on the power switch 93 of the load measuring device 81 to arrange the load measuring device 81, which has started the power supply, on the upstream side of the component mounting line 12. The board-to-board working system 10 conveys the load measuring device 81 from the upstream side of the component mounting line 12 to the working position of the mounting machine 11 to be measured. The mounting machine 11 to be measured operates the mounting head 24 and the suction nozzle 70 based on the control data D1 acquired from the production management computer 18, and executes the mounting work for the load measuring device 81. While the load measuring device 81 is being conveyed, the data logger 97 inputs the low-level recording start signal S2, and therefore does not record even if the detection voltage V2 is input from the load sensor 95. As a result, the load measuring device 81 can prevent erroneous recording of vibrations during conveyance as a load on the data logger 97.

Next, the mounter 11 to be measured positions the load measuring device 81 carried in from the upstream at the work position, and images the code portion 113 of the load measuring device 81 with the camera 69 of the mounting head 24. The control device 140 of the mounting machine 11 images the two fiducial marks 111 when the imaged code portion 113 matches the identification information of the load measuring device 81. The control device 140 may notify an error when the code section 113 does not match the identification code of the load measuring device 81. The control device 140 detects the accurate coordinate position of the positioned load measuring device 81 based on the imaged fiducial mark 111. The control device 140 executes the mounting work based on the detected coordinate position. The control device 140 presses the pressing switch 99A with an arbitrary suction nozzle 70. The measurement start switch 99 outputs a high-level recording start signal S2 to the data logger 97 by pressing the push switch 99A. The data logger 97 starts recording the detection voltage V2 for a predetermined time from this point. The control device 140 continuously presses the load input unit 95A with the plurality of suction nozzles 70. The load sensor 95 outputs a detection voltage V2 according to the pressing load of the suction nozzle 70 to the data logger 97. The data logger 97 ends the recording of the detection voltage V2 at the timing when a predetermined time for performing the above-described recording has elapsed since the high-level recording start signal S2 was input. The load data for each of the plurality of suction nozzles 70 is sequentially stored in the data logger 97.

Further, the control device 140 saves the timing information on the operation of each of the plurality of suction nozzles 70 as the log data D2 in the flash memory 141D (see FIG. 4) along with the measurement work. The log data D2 is, for example, a descent start time that is a time when the operation of actually lowering each of the plurality of suction nozzles 70 toward the load measurement device 81 is started, and each of the plurality of suction nozzles 70 is measured by the load measurement device. 81 is the rising start time at which the operation of lifting so as to separate from 81 is started. The descending start time and the ascending start time are, for example, times at which the controller 140 starts a descending or ascending command to the nozzle elevating device 67 (driving circuit 142). The control device 140 may be set to delete the old log data D2 in the flash memory 141D each time a new measurement operation is performed. This makes it easy to identify the latest log data D2 in one mounter 11. In addition, it is possible to prevent unnecessary past log data D2 from being accumulated in the mounting machine 11 and pressing the flash memory 141D.

Further, the control device 140 may store, in the log data D2, association information indicating a correspondence relationship between the descending start time and the ascending start time, which are timing information, and each of the plurality of suction nozzles 70. For example, the control device 140 may store, in the log data D2, information in which the nozzle ID for identifying each of the suction nozzles 70 and the descending start time and the ascending start time are associated with each other. Alternatively, the control device 140 may store, in the log data D2, information in which the holder ID for identifying each holder on which the suction nozzle 70 is mounted in the mounting head 24 is associated with the descending start time and the ascending start time. Thereby, the nozzle ID and the holder ID can be displayed in the processing of the analysis computer 19 (display processing of “measurement error” in S31 of FIG. 8) described later.

Then, the mounter 11 to be measured carries out the load measuring device 81. The board-to-board working system 10 conveys the load measuring device 81 carried out from the mounting machine 11 to be measured to the most downstream side (reflow device 15 side). Then, the user takes out the load measuring device 81 carried out from the component mounting line 12.

Returning to FIG. 8, the user operates the analysis computer 19 to acquire the log data D2 from the mounting machine 11 that has performed the measurement (S17). The analysis computer 19 acquires the log data D2 from the mounting machine 11 via the production management computer 18 (see FIG. 1). For example, when the analysis computer 19 receives an operation from the user indicating that the user wants to obtain the log data D2 in the operation unit 19A, the mounting machine that stores the log data D2 among the plurality of mounting machines 11 installed in the component mounting line 12 is installed. A screen for selecting 11 is displayed on the display unit 19B. The analysis computer 19 displays, for example, the serial number of the mounting machine 11 and the date and time when the log data D2 was acquired. For example, when the user operates the operation unit 19A (mouse) to select an arbitrary serial number, the analysis computer 19 outputs the log data D2 of the mounting machine 11 corresponding to the selected serial number to the production management computer 18 (installation). Download from machine 11). As a result, the user confirms the mounter 11 who desires to acquire the log data D2 by the serial number displayed on the display unit 19B of the analysis computer 19 and the acquisition date and time of the log data D2, and the like. The data D2 can be downloaded.

When the download of the log data D2 by the analysis computer 19 is completed (S17), the user connects the load measuring device 81 to the analysis computer 19 (S19). The user connects the external interface 101 of the load measuring device 81 and the external interface 19C of the analysis computer 19 with a USB cable.

In this state, for example, when the analysis computer 19 receives an input indicating that the user operates the operation unit 19A to start the analysis, the analysis computer 19 stores the measurement data D3 (for example, load data) stored in the data logger 97 of the load measurement device 81. The load data, which is the analog waveform of the detection voltage V2 shown, is read. The analysis computer 19 starts analysis of the read measurement data D3 based on the downloaded log data D2 (S21). Therefore, the analysis computer 19 of this embodiment executes the analysis assuming that the log data D2 downloaded from the mounting machine 11 selected by the user in S17 and the measurement data D3 read from the load measuring device 81 correspond to each other.

The analysis computer 19 may determine the measurement data D3 corresponding to the log data D2 based on the information indicating the relationship between the log data D2 and the measurement data D3. For example, the analysis computer 19 may determine the measurement data D3 corresponding to the log data D2 based on the time information of the log data D2 and the time information of the measurement data D3. The time information of the measurement data D3 here is, for example, the time when the load is measured (acquired) by the load measuring device 81. Further, when determining the correspondence relationship based on the time information, it is preferable that the reference time of the mounting machine 11 and the reference time of the load measuring device 81 be matched in advance. For example, the load measuring device 81 may be configured so that the mounting machine 11 and the reference time match each other by being connected to the analysis computer 19 before measurement. Then, when the load measuring device 81 after measurement is connected, the analysis computer 19 corresponds to the measurement data D3 based on the time information of the measurement data D3 read from the load measuring device 81 (the time information matches). The log data D2 may be retrieved from the mounting machine 11. Accordingly, the user is not required to select the log data D2, and the log data D2 corresponding to the measurement data D3 read by the analysis computer 19 can be automatically determined and associated.

The analysis computer 19 may determine the measurement data D3 corresponding to the log data D2 based on information other than the time information (information indicating the relationship between the log data D2 and the measurement data D3). For example, the mounting machine 11 may be configured to be communicable with the load measuring device 81 and notify the load measuring device 81 of identification information (information indicating the relevance) at the time of measurement. Then, the load measuring device 81 may store the identification information notified from the mounting machine 11 in association with the measurement data D3. As a result, the analysis computer 19 can retrieve the log data D2 corresponding to the measurement data D3 from the mounting machine 11 based on the identification information of the measurement data D3 read from the load measuring device 81.

Further, the load measuring device 81 may include an input unit capable of inputting the identification information of the measurement data D3. The user, for example, confirms the identification information (such as the module and the number that can specify the measurement date and time) displayed on the display panel 11A (see FIG. 1) of the mounting machine 11 before measuring the load, and inputs the load measurement device 81. Enter the identification information confirmed using. The load measuring device 81 may store the input identification information in association with the measurement data D3. Also in this case, the analysis computer 19 can retrieve the log data D2 corresponding to the measurement data D3 from the mounting machine 11 based on the identification information of the measurement data D3 read from the load measuring device 81.

The analysis computer 19 does not have to determine the correspondence between the log data D2 and the measurement data D3. For example, the load measuring device 81 may be configured so that only one measurement data D3 can be stored in the data logger 97. The work system 10 for a board may have a configuration in which the next load measurement cannot be executed until the analysis computer 19 analyzes the measurement data D3. As a result, the user always performs the analysis by the analysis computer 19 every time the load measurement is performed. That is, there is a constraint that the user performs work from measurement to analysis as a series of processes. In this case, the measurement data D3 acquired from the load measuring device 81 and the log data D2 acquired from the production management computer 18 have a one-to-one relationship, and it is not necessary to determine the correspondence relationship. Therefore, the analysis computer 19 can associate the log data D2 acquired from the production management computer 18 with the measurement data D3 acquired from the load measuring device 81 without determining the correspondence relationship.

Next, in S23, the analysis computer 19 associates the plurality of load data included in the measurement data D3 with the plurality of suction nozzles 70. FIG. 9 is an example of the measurement data D3, and shows a plurality of load data 151 to 153 included in the measurement data D3. Note that FIG. 9 shows only the load data 151, 152, 153 corresponding to the three suction nozzles 70 whose loads are measured first to third among the plurality (for example, 12) of suction nozzles 70. The vertical axis of FIG. 9 indicates the value of load. The horizontal axis of FIG. 9 indicates time.

As shown in FIG. 9, the measurement data D3 includes a plurality of continuous load data 151 to 153. The load data 151 to 153 are, for example, analog waveforms (analog data) of the detection voltage V2 indicating the load. Alternatively, the load data 151 to 153 may be analog waveforms obtained by converting the value of the detection voltage V2 into load values by the analysis computer 19. The time T0 in FIG. 9 is, for example, the time when the pressing switch 99A is pressed by the suction nozzle 70. The descent start times TS1, TS2, TS3 are times at which the operation of lowering the suction nozzle 70 to be measured is started in each of the load data 151 to 153 (measurement work). The rising start times TE1, TE2, and TE3 are times at which the operation of raising the suction nozzle 70 to be measured is started in each of the load data 151 to 153 (measurement work). For example, in the first measured load data 151, the suction nozzle 70 comes into contact with the load input unit 95A after a predetermined time (for example, 10 ms) has elapsed from the descent start time TS1, and the measured load has its timing (10 ms). Later) has begun to increase. Further, the load of the load data 151 increases with the feedback control by the control device 140, and becomes close to the maximum value M1 when the load acting on the suction nozzle 70 reaches the target load. The load of the load data 151 decreases when the rise start time TE1 for raising the suction nozzle 70 elapses. The load data 151 shown in FIG. 9 is an example, and shows an actual analog waveform in a simplified form.

The measurement time TW1 from the fall start time TS1 of the load data 151 to the rise start time TE1 is different from the measurement time TW2 of the load data 152 from the fall start time TS2 to the rise start time TE2. Similarly, the measurement time TW2 of the load data 152 and the measurement time TW3 of the load data 153 from the fall start time TS3 to the rise start time TE3 are different. The measurement times TW1, TW2, TW3 are, for example, 40 ms to 150 ms.

This is because the control device 140 of the present embodiment performs feedback control of the load applied from the suction nozzle 70 to the component. Specifically, the control device 140 is in a state in which the force required to lower the suction nozzle 70 is a desired force, that is, from the suction nozzle 70, based on the current value of the drive power of the drive circuit 142, for example. The suction nozzle 70 is lowered until a desired load is applied to the component. The control device 140 starts to raise the suction nozzle 70 when a desired load is applied to the component from the suction nozzle 70, for example. Therefore, the load data 151 to 153 have different sliding resistances in the vertical movements of the suction nozzles 70, etc., so that the load rises depending on the state of the load acting on the suction nozzle 70 from time to time. The waveforms have different amounts of change. As a result, variations occur in the measurement times TW1, TW2, TW3 of the load data 151-153. In addition, the load data 151 to 153 do not line up at equal intervals with respect to the time axis, but have irregular intervals.

On the other hand, the log data D2 of the present embodiment stores the descent start times TS1 to TS3 and the rising start times TE1 to TE3 corresponding to the suction nozzles 70 saved by the mounting machine 11 in the measurement work. In S23, the analysis computer 19 collates the falling start times TS1 to TS3 and the rising start times TE1 to TE3 included in the log data D2 acquired in S17 with the time of the measurement data D3. Then, the analysis computer 19 detects which suction nozzles 70 the plurality of load data 151 to 153 included in the measurement data D3 correspond to and associates them. As shown in FIG. 9, the analysis computer 19 associates, for example, the load data 151 including the descending start time TS1 and the ascending start time TE1 with the suction nozzle 70 (nozzle 1 in the figure) measured first. Similarly, the analysis computer 19 associates the load data 152 including the descending start time TS2 and the ascending start time TE2 with the suction nozzle 70 (nozzle 2 in the figure) measured second. Similarly, the analysis computer 19 associates the load data 153 including the descending start time TS3 and the ascending start time TE3 with the suction nozzle 70 (nozzle 3 in the figure) measured third.

Therefore, the information (timing information) used for the association of the present embodiment is the actual timing information (descent start) when the mounting machine 11 actually operates each of the plurality of suction nozzles 70 (holding units) in the load measurement work. Times TS1 to TS3 and rising start times TE1 to TE3). According to this, the analysis computer 19 (analyzer) operates each suction nozzle 70 (holding unit) from among the plurality of load data 151 to 153 based on the actual timing information (fall start time TS1 and the like). The load data 151 to 153 and the suction nozzle 70 can be associated with each other by specifying the load data 151 to 153 that match the predetermined time (such as the descent start time TS1). As a result, the suction nozzle 70 and the load data 151 to 153 can be more accurately associated with each other based on the actual timing of actual operation.

Note that the timing information of the present application is not limited to the actual timing information described above, but may be estimated timing information that estimates the timing at which each of the plurality of suction nozzles 70 (holding units) operates from the operating conditions of the mounting machine 11. The estimated timing information referred to here is, for example, a predetermined mounting based on the descent start time TS1 when the first suction nozzle 70 (holding unit) is lowered toward the load measuring device 81 in the measurement work. This is information that estimates the timing at which the suction nozzle 70 operates, based on the operating conditions of the machine 11 (mounting order, cycle time for operating the suction nozzle 70 of the mounting head 24, etc.). According to this, the analysis computer 19 (analyzer), based on this estimated timing information, the load data 151 to 153 matching the estimated timing estimated by each suction nozzle 70 from among the plurality of load data 151 to 153. By specifying, the load data 151 to 153 and the suction nozzle 70 can be associated with each other. Particularly, in the mounting machine 11 that does not perform load feedback control, the suction nozzle 70 is moved up and down at a fixed cycle time regardless of the magnitude of the load. Therefore, the detected load data 151 to 153 should be arranged at equal intervals. Therefore, it becomes easier to estimate the lowering timing of the other suction nozzles 70 by using the cycle time or the like with reference to the timing of one suction nozzle 70. That is, it is extremely effective to use the estimated timing in the mounting machine 11 that does not execute the load feedback control.

Further, the reference time used for the timing estimation is not limited to the descent start time TS1 and the rising start time TE1, and for example, the time when the command before starting the operation of the suction nozzle 70 is determined or the suction nozzle 70 is being lowered. You may use the time on the way (time of an intermediate point) etc. Further, the operating condition of the mounting machine 11 used for estimating the timing is not limited to the cycle time, and for example, an average speed of operating the suction nozzle 70, a time for changing the position of the suction nozzle 70, or the like may be used. Further, the process of estimating the timing may be executed by the mounting machine 11 side that performs the measurement, or may be executed by the analysis computer 19.

Next, the analysis computer 19 extracts the data used for the process of determining the quality of the load in S29 described below from each of the load data 151 to 153 (S25). The analysis computer 19 extracts, for example, the data from the falling start time TS1 to the rising start time TE1 in the first load data 151. Then, the analysis computer 19 detects the maximum value M1 of the load in the extracted data as the quality determination data. Similarly, the analysis computer 19 extracts the data from the falling start times TS2, TS3 to the rising start times TE2, TE3 of the load data 152, 153, and detects the maximum values M2, M3, respectively.

Therefore, the plurality of load data 151 to 153 of this embodiment are data in which the load changes with the passage of time. The analysis computer 19 (analyzer) determines the plurality of suction nozzles 70 from each of the plurality of load data 151 to 153 based on the descending start time TS1 and the like (timing information) of each of the plurality of suction nozzles 70 (holding units). An extraction process (S25) for extracting data for a predetermined period corresponding to each of them, and a determination process (S29) for determining the quality of the load based on the data extracted by the extraction process are executed.

According to this, the load data 151 to 153 are, for example, analog data in which the load increases or decreases with the passage of time. The analysis computer 19 (analyzer) extracts the data of the required predetermined time from the load data 151 to 153 based on the timing information (fall start time TS1 and the like). As a result, when the load (noise) increased by the vibration or the like accompanying the measurement is included in the load data 151 to 153 (when it is included other than the predetermined time), only the necessary portion is extracted based on the descending or ascending timing. As a result, desired load data 151 to 153 from which noise is removed can be acquired. Then, the analysis computer 19 determines whether the load of each suction nozzle 70 (holding unit) is a desired load more accurately by determining the quality of the load based on the extracted data (S29). be able to.

The analysis computer 19 may detect the maximum value M1 by extracting data from the load data 151 using only one of the descending start time TS1 and the ascending start time TE1 in the extraction process of S25. For example, the analysis computer 19 may extract the data between the first fall start time TS1 and the second fall start time TS2 and detect the maximum value M1 from the data. Alternatively, the analysis computer 19 may extract the data from the descent start time TS1 to a predetermined time later and detect the maximum value M1 from the data. Further, the analysis computer 19 may extract the data from the rising start time TE1 to a predetermined time before, and detect the maximum value M1 from the data.

Further, in the extraction process of S25, the analysis computer 19 does not detect the maximum values M1 to M3 as the data used in the determination process of S29, but calculates the average value or standard deviation of the extracted data to perform the determination process of S29. You may use.

Next, the analysis computer 19 determines whether, among the plurality of load data 151 to 153, there is load data 151 to 153 whose maximum load values M1, M2, M3 are equal to or less than the threshold value TH (S27). .. Here, when an abnormal operation of the stack or the like occurs, the suction nozzle 70 cannot descend to the load measuring device 81, or even if it can descend, the load input unit 95A cannot be appropriately pressed. In this case, the load data 151 to 153 of the suction nozzle 70 in which the operation abnormality occurs includes the data in which the load does not increase, or the data including an extremely small increase in the load, that is, a state in which the data is missing. .. Therefore, the analysis computer 19 determines whether or not the load data 151 to 153 in which the maximum load values M1 to M3 are equal to or less than the threshold value TH exists, and thus the load data 151 to which the load does not increase due to the operation abnormality. It is determined whether 153 exists (S27). Therefore, the threshold value TH (see FIG. 9) used in S27 is set according to the values of the load data 151 to 153 that do not increase due to the operation abnormality. The threshold TH is 0.2 N (Newton), for example.

The analysis computer 19 determines pass/fail of the load data 151-153 according to the absence of the load data 151-153 whose maximum values M1-M3 are less than or equal to the threshold value TH (S27: YES) (S29). In the control data D1 of the present embodiment, a target load value that is a target for feedback control of the load applied from the suction nozzle 70 to the component when measuring the load, and a load width indicating a range of the allowable load value. It is set. In S29, the analysis computer 19 determines the quality of the load based on the target load value and the load width.

For example, the analysis computer 19 determines whether the load is good or bad by determining whether or not the maximum value M1 (load value) of the load data 151 extracted in S25 is within the range of the load width with the target load value as a reference. judge. The analysis computer 19 determines that the load data 151 (measured load of the suction nozzle 70) is good when it is within the range of the maximum value M1 or the load width. The target load value is, for example, 181 gf (gram force). The load width is, for example, 20%. In this case, for example, when the maximum value M1 is less than or equal to the upper limit value (217.2gf=181gf*1.2) and less than or equal to the lower limit value (144.8gf=181gf*0.8), the analysis computer 19 The load is judged to be good. Note that, for example, when the measurement is performed a plurality of times for one suction nozzle 70, the analysis computer 19 determines whether or not all the maximum values M1 of the load data 151 for the plurality of times are within the load width range. You may judge. In addition, the analysis computer 19 may determine that the load is good, for example, when a part (a majority, etc.) of the load values measured a plurality of times is included in the load width. Further, the analysis computer 19 may determine the quality of the load based on the target load value or the load width. For example, the analysis computer 19 may determine the quality of the load based on whether the maximum value M1 matches the target load value. Alternatively, the analysis computer 19 may determine the quality of the load by determining whether or not the plurality of maximum values M1 obtained by performing the measurement a plurality of times are within a certain load width with reference to the average value thereof.

Next, the analysis computer 19 displays the analysis result on the display unit 19B (S31). In addition to the quality of the load of each suction nozzle 70, the analysis computer 19 combines, for example, the serial number of the load measuring device 81, the serial number of the mounting machine 11, the serial number of the mounting head 24, and the like of each suction nozzle 70. Indicates the load value. As the load value to be displayed, for example, the target load value, the load width, and the maximum values M1 to M3 described above are displayed. When the measurement is performed a plurality of times for one suction nozzle 70, the load value of one suction nozzle 70 may be, for example, an average value, a 3 sigma value, a minimum value, a maximum value, or the like. Further, the analysis computer 19 can acquire the serial number of the mounting machine 11 and the like from the control data D1. The analysis computer 19 may also display a scatter diagram of load values, a bar graph, a line graph, or the like.

On the other hand, in S27, the analysis computer 19 responds to the presence of the load data 151 to 153 whose maximum values M1 to M3 are equal to or less than the threshold value TH (S27: NO), and the load data 151 to be equal to or less than the threshold value TH. As the information of the suction nozzle 70 associated with 153, information on the occurrence of a malfunction such as a stack is set (S33). FIG. 10 shows, as an example, a state in which a stack is generated when the nozzle 2 (load data 152) is measured. As shown in FIG. 10, the load data 152 does not increase beyond the threshold TH even after the descent start time TS2, and the maximum value M2 is equal to or less than the threshold TH.

Here, if the analysis computer 19 does not execute association of the load data 152 based on the descending start time TS2, the ascending start time TE2, etc., and simply associates the data exceeding the threshold value TH with the suction nozzle 70 as the load data 152. think of. In this case, the analysis computer 19 mistakenly considers the second load data 153 that exceeds the threshold TH as the load data 152 corresponding to the nozzle 2 (second suction nozzle 70) after the first load data 151. There is a risk of association. In other words, the missing data is skipped and the load data 151 to 153 are associated with the measured order of the suction nozzles 70. As described above, the plurality of load data 151 to 153 of the present embodiment are not arranged at equal intervals with respect to the time axis by the feedback control, and have irregular intervals. Therefore, it is more likely that such a suction nozzle 70 and the load data 151 to 153 are associated with each other in a shifted manner.

On the other hand, in the analysis computer 19 of the present embodiment, since the load data 151 to 153 and the suction nozzle 70 are associated with each other by using the descent start time TS1 and the like, the suction nozzle in which data is missing due to an operation abnormality. 70 can be identified. The analysis computer 19 sets the information of the load data 151 to 153 (for example, the load data 152) that has become equal to or less than the threshold value TH (S33), then executes the pass/fail judgment of S29, and executes S31. The analysis computer 19 displays the information of the suction nozzle 70 in which the operation abnormality is detected in the display process of S31. For example, the analysis computer 19 displays that a “measurement error” has occurred in the column corresponding to the suction nozzle 70 (nozzle 2) in which the operation abnormality has occurred.

Therefore, the analysis computer 19 (analyzer) of the present embodiment, when there is the load data 152 in which the maximum values M1 to M3 of the loads are equal to or less than the threshold value TH among the plurality of load data 151 to 153 (S27: NO). ), and the notification process (S31) of notifying the information about the suction nozzle 70 (nozzle 2) associated with the load data 152 whose maximum value M2 is equal to or less than the threshold value TH is executed.

When an abnormal operation such as a stack occurs, the load data 151 to 153 corresponding to the suction nozzle 70 in which the abnormal operation occurs cannot be measured or has an extremely small value. On the other hand, when there is a suction nozzle 70 whose maximum load values M1 to M3 are less than or equal to a desired threshold value TH, that is, when there is a suction nozzle 70 whose load cannot be detected, the analysis computer 19 reports information about the suction nozzle 70. To do. Since the analysis computer 19 appropriately associates the load data 151 to 153 with the suction nozzle 70 in the association process of S23, it is possible to more accurately identify the suction nozzle 70 that cannot detect the load (does not satisfy the threshold TH). For this reason, the user who confirms the display (notification) of the analysis computer 19 can quickly and accurately identify the suction nozzle 70 in which an abnormality such as a stack has occurred, and an appropriate response such as replacement of the suction nozzle 70 or cleaning. It can be performed.

As described above, in the log data D2, information that associates the nozzle ID for identifying each of the suction nozzles 70, the holder ID for identifying each holder to which the suction nozzle 70 is attached, and the descending start time and the ascending start time. May be saved. In this case, when the above-mentioned “measurement error” is displayed, the analysis computer 19 can display the nozzle ID and the holder ID in association with the suction nozzle 70 having the measurement error. Thereby, for example, the suction nozzle 70 having the measurement error can be easily specified from the suction nozzles 70 attached to the holder of the mounting head 24 based on the holder ID. Further, for example, when the suction nozzle 70 has already been removed from the holder of the mounting head 24, the suction nozzle 70 having the measurement error can be easily specified based on the nozzle ID.

In addition, the analysis computer 19 may execute a process of deleting the log data D2 used for the analysis from the mounting machine 11 in accordance with the quality determination (S29) and the end of the result display (S31). For example, the analysis computer 19 deletes the downloaded log data D2 and the original data stored in the mounting machine 11 at the timing when the determination is completed (S29). The analysis computer 19 notifies the production management computer 18 that the log data D2 (original data) of the mounting machine 11 will be deleted. As a result, the log data D2 stored in the mounting machine 11 is deleted at the timing when it is used in the analysis and is no longer needed.

Incidentally, in the above-mentioned embodiment, the board-to-board working system 10 is an example of a load measuring system. The analysis computer 19 is an example of an analysis device. The suction nozzle 70 is an example of a holding unit. The log data D2 is an example of timing information. The fall start times TS1 to TS3 and the rise start times TE1 to TE3 are examples of actual timing information.

According to the above-mentioned embodiment, the following effects are produced.
The board-to-board work system 10 (load measuring system) of the present embodiment includes a mounting head 24 that has a plurality of suction nozzles 70 (holding units) and mounts the components held by the plurality of suction nozzles 70 on the board CB. A load measuring device 81, which is arranged in the mounting machine 11 and measures the load applied to the component by the plurality of suction nozzles 70 at the time of mounting, and an analysis computer 19 (analysis device). The analysis computer 19 performs a first acquisition process (S17) that acquires the descent start time TS1 and the like (timing information) of the log data D2, which is information related to the timing at which each of the plurality of suction nozzles 70 operates in the load measurement operation. Log data D2 acquired by the second acquisition process (S19) of acquiring the plurality of load data 151 to 153, which is the result of measuring the load on each of the plurality of suction nozzles 70, from the load measuring device 81 and the first acquisition process. Based on the above, the association processing (S23) for associating the plurality of load data 151 to 153 acquired in the second acquisition processing with the plurality of suction nozzles 70 is executed.

According to this, the analysis computer 19 (analysis device) acquires the log data D2 (timing information) regarding the timing at which each of the plurality of suction nozzles 70 operates in the load measurement work. This timing information is, for example, information on the actual operation of each suction nozzle 70, information estimated from the information, or the like. The analysis computer 19 associates the plurality of load data 151 to 153 acquired from the load measuring device 81 with the plurality of suction nozzles 70 based on the log data D2 (timing information). As a result, even if some suction nozzles 70 fail to measure the load and the load data 151 to 153 are lost due to an abnormal operation of the stack or the like, the analysis computer 19 uses the log data D2 that is actually operated. Based on the plurality of suction nozzles 70, the plurality of load data 151 to 153 can be associated with each other. As a result, for example, the suction nozzle 70 for which the load cannot be measured, that is, the suction nozzle 70 in which the operation abnormality of the stack or the like has occurred can be specified.

Further, the mounting machine 11 performs feedback control of the load applied to the component by the suction nozzle 70 that executes the mounting work among the plurality of suction nozzles 70 (holding units) during the mounting work for mounting the component on the board CB. It is a thing.

According to this, in the mounting work for mounting the component on the board CB, the mounting machine 11 performs feedback control of the load applied to the component from the suction nozzle 70 (holding unit) that performs the mounting work, and determines the load applied to the component. Control to desired load. In the mounting machine 11 that executes this feedback control, for example, the suction nozzle 70 is lowered until the desired load can be detected, and the suction nozzle 70 presses the component toward the board CB. This operation is the same in the load measurement work that does not use the component or the board CB. The mounter 11 performs feedback control to perform different operations on the suction nozzles 70 according to the fluctuating load. As a result, the load data 151 to 153 corresponding to the suction nozzles 70 have different waveform rising and falling timings, and the time from the rising to the falling, that is, the load measurement time (measurement time TW1 and the like). Will be different. For example, the plurality of load data 151 to 153 arranged along the time axis are not arranged at equal intervals as shown in FIG. 9, and are arranged in a scattered manner according to actual feedback control. Since the load data 151 to 153 are not arranged at equal intervals, if the load data 151 to 153 are missing, it becomes particularly difficult to associate the load data 151 to 153 with the suction nozzle 70.

On the other hand, in the mounting machine 11, when stacking occurs, in the operation of lowering the suction nozzle 70, even if the suction nozzle 70 cannot actually be lowered due to a catch or the like, the load to be fed back increases. That is, it is difficult for the mounter 11 to determine whether the load has increased due to stacking, or the load has normally decreased and hit the load measuring device 81 to increase the load. Since no error occurs on the mounting machine 11 side, it becomes more difficult to associate the load data 151 to 153 with the suction nozzle 70. On the other hand, in the present embodiment, the plurality of suction nozzles 70 and the plurality of load data 151 to 153 are acquired based on the descent start time TS1 or the like (timing information) when each of the plurality of suction nozzles 70 is actually operated. It is possible to identify the suction nozzle 70 in which an abnormality such as an association or a stack has occurred. Therefore, it is extremely effective to use the load measuring system of the present application for the mounting machine 11 that executes this type of feedback control.

Further, the present application is not limited to the above-described embodiments, and can be implemented in various modes in which various changes and improvements are made based on the knowledge of those skilled in the art.
For example, in the above embodiment, the timing information used for association is not limited to the log data D2 of the mounting machine 11. For example, the mounting machine 11 may be configured to be communicable with the load measuring device 81 and notify the load measuring device 81 of timing information when the suction nozzle 70 is operated during measurement. Then, the load measuring device 81 may store the timing information notified from the mounting machine 11 in association with each of the load data 151 to 153. Accordingly, the analysis computer 19 can associate the load data 151 to 153 with the suction nozzle 70 based on the load data 151 to 153 read from the load measuring device 81 and the timing information associated with the load data 151 to 153. For example, the analysis computer 19 starts the second suction nozzle 70 (nozzle 2) from the timing (notification time) at which the first suction nozzle 70 (nozzle 1) is operated based on the timing information read from the load measuring device 81. Data up to the timing (notification time) at which (1) is operated may be processed as the load data 151 of the nozzle 1. In this case, the load measuring device 81 may be configured to receive only the notification of the timing of moving the first suction nozzle 70 (nozzle 1) from the mounting machine 11. Then, the analysis computer 19 may estimate the timings of the other nozzles (from the nozzle 2 onward) based on the other information with reference to the timing of the nozzle 1. The other information referred to here is, for example, the cycle time for operating the suction nozzle 70 of the mounting head 24.

The load data 151 to 153 are not limited to analog data, and may be discrete digital data.
The analysis computer 19 does not have to execute the extraction process in S25. In this case, the analysis computer 19 may divide the measurement data D3 for each of the descent start times TS1 to TS3 and process the divided data as the load data 151 to 153, for example.
The mounter 11 may have a configuration in which the load applied to the component from the suction nozzle 70 is not feedback controlled.
Further, the analysis computer 19 does not have to execute the process of comparing the maximum values M1 to M3 of the load data 151 to 153 with the threshold value TH (S27) or the process of notifying an error according to the result (S33).

Further, in the above embodiment, the load may be measured using a plurality of load measuring devices 81. In this case, the mounting machine 11 may, for example, capture an image of the code section 113 (see FIG. 5) of each load measuring device 81 at the start of measurement and associate the information of the code section 113 with the log data D2. Thereby, for example, the analysis computer 19 reads the code part 113 of the load measuring device 81 with the barcode reader when connecting the load measuring device 81, and the information of the code part 113 is used as key information, and the measurement data D3. The log data D2 corresponding to can be retrieved from the mounting machine 11.

Further, in the above-described embodiment, the case where the board-to-board working system 10 including the mounting machine 11, the solder printing machine 13, the production management computer 18 and the like is adopted as the load measuring system of the present application has been described, but the present invention is not limited to this. The load measuring system of the present application may be configured to include only the analysis computer 19 and the load measuring device 81, for example.
Further, the analysis computer 19 may directly acquire the log data D2 from any mounting machine 11 without going through the production management computer 18.
The production management computer 18 and the analysis computer 19 are not limited to personal computers, and may be server devices.

Further, the object of measuring the load of the present application is not limited to the suction nozzle 70. In the above embodiment, the mounting head 24 presses the pressing switch 99A or the like with the suction nozzle 70. However, for example, the mounting head 24 may press the pressing switch 99A with another member (chuck or the like) that holds the component.
The configuration of the load measuring device 81 of the above embodiment is an example, and can be changed as appropriate. For example, the number of fiducial marks 111 is not limited to two and may be one or three or more. Further, for example, the push switch 99A and the load input portion 95A may be provided at positions separated from each other. Further, for example, the power switch 93 and the external interface 101 may be provided on the upper surface 83A.

10-to-board work system (load measurement system), 11 mounting machine, 19 analysis computer (analysis device), 24 mounting head, 70 suction nozzle (holding part), 81 load measurement device, 151-153 load data, CB board, D2 Log data (timing information), TS1 to TS3 fall start time (timing information), TE1 to TE3 rise start time (timing information), M1 to M3 maximum value, and TH threshold value.

Claims (6)

The mounting unit is provided with a mounting head that mounts the components held by the plurality of holding units on the substrate, and the plurality of holding units are attached to the components by collision or pressing during mounting. A load measuring device that measures the applied load,
And an analyzer,
The analyzer is
A first acquisition process for acquiring timing information, which is information related to the timing at which each of the plurality of holding units operates in the load measuring operation,
A plurality of load data, which is a result of measuring the load in each of the plurality of holding units, a second acquisition process of acquiring from the load measuring device,
Based on the timing information acquired in the first acquisition process, by specifying the one holding unit corresponding to each of the plurality of load data acquired in the second acquisition process, the plurality of load data and Association processing for associating the plurality of holding units,
A load measurement system that executes. The load measuring system according to claim 1, wherein the timing information is actual timing information when the mounting machine actually operates each of the plurality of holding units in the load measuring operation. The load measuring system according to claim 1, wherein the timing information is estimated timing information in which a timing at which each of the plurality of holding units operates is estimated from an operating condition of the mounting machine. The plurality of load data is data in which the load changes with the passage of time,
The analyzer is
An extraction process of extracting data of a predetermined period corresponding to each of the plurality of holding units from each of the plurality of load data, based on the timing information of each of the plurality of holding units,
The load measurement system according to any one of claims 1 to 3, which executes a determination process of determining the quality of the load based on the data extracted in the extraction process. In the mounting work for mounting the component on the board, the mounter performs feedback control of the load applied to the component by the holding unit that executes the mounting work among the plurality of holding units. The load measuring system according to any one of claims 1 to 4. Of the plurality of load data, the analysis device, when there is load data in which the maximum value of the load is less than or equal to a threshold value, notifies the information about the holding unit that is associated with the load data in which the maximum value is less than or equal to the threshold value. The load measurement system according to any one of claims 1 to 5, wherein the load measurement system executes the notification process.

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