JP3754774B2 - Component mounting method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component mounting apparatus such as an electronic component mounter, and more particularly to an operation of a supply table at the time of a component shortage and a method of notifying a component shortage.
[0002]
[Prior art]
A conventional configuration example of the electronic component mounting machine will be described with reference to FIGS.
[0003]
In FIG. 7, reference numeral 1 denotes an operation control unit, and 1a denotes an operation unit, which includes an instruction to the apparatus, an input device for inputting data, a menu for various operations, and a screen for displaying the state of the apparatus. Yes. Reference numeral 2 denotes a mounting unit, which includes a plurality of mounting heads and nozzles for sucking components for each head, and performs component suction and mounting operations by this rotation operation. Reference numeral 3 denotes a substrate positioning unit composed of an orthogonal table, which positions the circuit board at an arbitrary position by the rotation operation of the X-axis and Y-axis motors. Reference numeral 4 denotes a component supply unit having a plurality of supply tables on which a large number of electronic component supply means (hereinafter referred to as cassettes) are mounted. The supply table picks up a cassette mounted by driving a Z-axis motor to attract electronic components. Move to position or cassette replacement position. The component supply unit 4 has two supply tables, a supply table A and a supply table B, each having a unique number (hereinafter referred to as a Z number) for identifying the position of the cassette. ZA and ZB in the figure indicate supply table A and supply table B, respectively.
[0004]
FIG. 8 shows a list of operation patterns of the supply table A and the supply table B. The connection mode is a mode in which the supply table A and the supply table B are a series and parts are supplied from both tables. The preparation mode is a mode in which the cassette of the next production type is prepared by making the other table stand by during the production with the supply table on one side, and one of the supply tables is dedicated for the production. In the replacement mode, the same parts and the same cassette arrangement are set in the supply table A and supply table B, and when the parts are out of order in the priority table, the parts are automatically switched from the other spare table. In this mode, movement to the standby position does not occur until this occurs. The priority exchange mode is the same as the exchange mode, but the spare table operates only during the replacement of the parts-out cassette of the priority table, and the priority table is used in a concentrated manner. In both the exchange mode and the priority exchange mode, it is necessary to designate a priority table in advance before production. These operation patterns are selected according to various production forms, such as small-scale production with many types of switching and mass-production with few types of switching.
[0005]
FIG. 9 shows a part of data necessary for producing a circuit board.
[0006]
FIG. 9A defines an order in which electronic components are mounted (called a block for each order), and is called an NC program. Each block has a two-dimensional position coordinate on which the electronic component is mounted, and a Z number that designates a cassette that holds the electronic component. FIG. 9B is a supply table that defines the Z number and the type of electronic component set in the cassette, and is called an array program. When producing circuit boards, the intended electronic components are mounted at each mounting position by creating and selecting data partially shown in FIG. 9 and selecting the operation pattern of the supply table shown in FIG. The data to be transferred is transferred and the model is switched.
[0007]
In the electronic component mounting machine configured as described above, the operation of each supply table in accordance with the operation pattern for replacing the component-out cassette when the component is out of operation and the work procedure at the time of replacement will be described below. .
[0008]
When operating in the connection mode and the preparation mode, the supply table in which the part has run out moves to the standby position at that time, and waits for the replacement of the part running cassette. The operator determines the state of the component supply unit 4 displayed on the screen of the operation unit 1a of the operation control unit 1 in FIG. Replace the cassette. After the replacement is completed, the apparatus is notified by pressing the replacement completion button provided at the standby position, and immediately moves to the suction position to continue production.
[0009]
When operating in the exchange mode, if a part breakage occurs in the supply table specified in the priority table when switching models, the Z number where the part breakage occurred until the final block of the NC program is reached for the circuit board being produced. Skip production blocks and continue production. When the final block of the NC program is reached, the supply table in which the parts have run out moves to the standby position and waits for the part-out cassette to be replaced. On the other hand, the spare table immediately moves to the suction position and operates so as to replenish the skipped blocks. Next, even if a circuit board to be produced is carried in, the standby table is not moved to the standby position until the spare table in operation has run out, and the supply table at the standby position becomes a standby table for the active supply table. . The operator replaces the component-cut cassette while the supply table is at the standby position, and presses a replacement completion button.
[0010]
When operating in the priority replacement mode, the spare table continues to be produced even if the parts run out as in the replacement mode. However, the production with the spare table is until the next circuit board to be produced is carried in, and the supply table designated as the priority table is again preferentially operated. When a part is cut off in the priority table and moved to the standby position, the next circuit board is not produced until the operator replaces the part-out cassette and presses the replacement complete button. Similarly, when the spare table is out of parts, it is possible to operate after replacing the cassette in which the parts are out and pressing the button for completion of replacement.
[0011]
[Problems to be solved by the invention]
However, in the configuration as described above, immediately after the occurrence of a component shortage, or after the completion of the production of the circuit board being carried in, the supply table that has generated the component shortage always moves to the standby position and waits for the operator to complete the component replacement. In the situation where the remaining number of each electronic component is uniformly reduced, such as in the production of circuit boards that need to mount a wide variety of electronic components, the components will run out intensively. There was a problem that parts replacement work frequently occurred.
[0012]
In addition, in relation to the above problems, there has been a problem that the operator's parts replacement work cannot catch up and production is interrupted, causing a reduction in operating rate.
[0013]
In view of the above-described conventional problems, an object of the present invention is to provide a component mounting method and apparatus capable of improving production efficiency by eliminating production interruption due to frequent component replacement work due to component shortage.
[0014]
[Means for Solving the Problems]
A component mounting method and apparatus according to the present invention is a component mounting method in which a component is held by a component supply unit having a plurality of movable supply tables on which a plurality of component supply units are mounted, moved to a mounting position, and mounted. When multiple parts supply means are mounted so that multiple types of parts are arranged in the same arrangement in multiple supply tables, the supply table to be used and the supply table to be standby are specified, and the parts that have run out of the supply table to be used In the operation mode in which production is continued by automatically using this supply table and waiting, the supply table is replaced when the number of parts that have run out of parts reaches a certain upper limit value. By notifying parts out in a replaceable state, parts out notice is sent to multiple parts at the same time, and multiple parts are replaced at once. It is eliminating the production interruption due to goods exchange work, so that to improve the utilization rate.
[0015]
In addition, based on the number of parts that can be supplied and the possible production number calculated from the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the first part failure occurs is set. When the predetermined number is produced, the supply table is in a state where the parts can be replaced, and the part replacement notification is sent to control the period from when the part first occurs to when the part replacement operation is actually performed. it can.
[0016]
In addition, if the list of parts to be replaced is displayed in advance before the work for replacing a part that has run out of parts, it is possible to accurately give the operator a preparation instruction for the next part replacement work. The operator's work efficiency can be improved.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The electronic component mounter according to the first embodiment of the present invention will be described below with reference to FIGS. In addition, the whole structure of an electronic component mounting machine is the same as that of the prior art example demonstrated with reference to FIG. 7, The description is used.
[0018]
In FIG. 1, reference numeral 5 denotes a component recognition unit, which is a block for specifying the type and shape of the electronic component sucked by the nozzle of the mounting unit 2 by two-dimensional image processing. The electronic component is actually sucked by the nozzle. Whether or not the part is out is determined by whether or not it is present. Reference numeral 6 denotes a part-out information accumulating unit, which is a block for holding a part-out Z number that is generated until the apparatus can be replaced. Reference numeral 7 denotes a component replacement determination unit that determines whether or not to replace a component based on instructions from the component recognition unit 5 and the component-out information accumulation unit 6. When replacing parts, the supply table operation control unit 8 moves the supply table to a standby position where the parts can be replaced. Further, the Z number and the name of the electronic component in which the component breakage occurred in the screen display unit 9 are displayed on the display screen of the operation unit 1a. When the part replacement work by the operator is completed, the part replacement completion processing unit 10 makes the supply table operable to the suction position, and notifies the part-out information accumulating unit 6 of the cancellation of the part-out state.
[0019]
FIG. 2 shows a flowchart of component replacement operation when electronic components are mounted. In FIG. 2, when production is started (step # 1), the number e of cassettes that are currently out of parts in the supply table is initialized (step # 2), and then parts are out during production (step # 2). In step # 3), it is first determined whether or not the operation pattern of the supply table is the exchange mode or the priority exchange mode (step # 4). If the connection mode or the preparation mode is other than the exchange mode or the priority exchange mode, the process jumps to Step # 10. In the replacement mode or the priority replacement mode, 1 is added to the number of cassettes out of parts (step # 5), and it is determined whether or not the spare table parts replacement work is completed (step # 6). If it is determined, it is next determined whether or not the number of cassettes out of parts e is smaller than a preset E (step # 7). Here, E is an accumulation of the number of cassettes that are out of components until notification of component failure, and is an appropriate value registered in advance in the apparatus by the operator. If the number of cassettes out of parts e is smaller than E, that is, if E> e, the operator is not notified even if the parts are out of production, and the production is continued while using the spare table for the parts in the parts out cassette. (Step # 8). Specifically, the block of the Z number in which the part cut has occurred is skipped until the final block of the NC program is reached, and production is continued. After that, when the NC program reaches the final block, the supply table in which the part has run out moves to the standby position, and the spare table immediately moves to the suction position and operates to replenish the skipped blocks. Thereafter, when the next circuit board is carried in, the spare table is moved again to the standby position, and the priority table is operated.
[0020]
When the number of cassettes out of parts e becomes E, the process proceeds to step # 9, and the block with the Z number in which the parts are cut out is skipped until the final block of the NC program is reached in the same manner as described above. When it reaches, it proceeds to step # 10. In step # 10, the operator is notified of the occurrence of part shortage, and the supply table moves to the standby position so that parts replacement work is possible. FIG. 3 shows a menu for displaying the state of the component supply unit displayed on the screen of the operation unit 1a. In FIG. 3, 11 indicates the name of the electronic component set at each Z number in the A table, and 12 indicates the name of the electronic component set at each Z number in the B table. The Z number and the name of the electronic component that are out of parts during production are identified by being displayed in red. Reference numeral 13 denotes an area for displaying an error that has occurred in the apparatus. When notifying the occurrence of a component shortage as described above, a message to that effect and a Z number indicating the location where the error occurred are output. Then, the process proceeds to step # 11, and the part replacement work is performed based on the information displayed by the operator. If one spare table is operable in this state, production is continued in the exchange mode or priority exchange mode. On the other hand, the supply table in which the part has run out cannot operate for the next operation request unless the part replacement is completed.
[0021]
In the above first embodiment, as the parameter E registered by the operator is larger, the number of circuit boards that can be continuously produced before the notification of component shortage is increased, and the operator can perform one-time components. Although the number of cassettes that can be replaced at a time in the replacement operation increases, the suction position of the priority table and the spare table for each circuit board production until the part replacement occurs and the parts are replaced first. Movement between the standby positions occurs. In addition, since the mounting order of the mounting blocks in which parts are out of operation is changed after mounting the final block of the NC program, productivity is reduced as compared with the mounting operation according to the mounting order as defined in the NC program.
[0022]
On the other hand, the smaller the parameter E, the smaller the number of circuit boards that can be continuously produced before notifying that the parts are out. Therefore, it is necessary to adjust and set the parameter E so as to be an optimum value according to the production form.
[0023]
As described above, according to the present embodiment, the operation of the operator is reduced by operating the supply table so that a plurality of component-cut cassettes can be replaced at once in a component-cut replacement operation, and giving appropriate instructions. be able to.
[0024]
In the above embodiment, the electronic component mounting machine having the structure including the mounting unit 2 having the rotating head and the substrate positioning unit 3 having the orthogonal table as shown in FIG. 7 has been described. Needless to say, the present invention can also be applied to an electronic component mounting machine having the mounting portion 2 provided with the.
[0025]
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a screen example of a menu that refers to the remaining number of electronic components mounted on each cassette corresponding to the Z number of the supply table, displayed on the screen of the operation unit 1a of FIG. In FIG. 4, 14 is a button for switching the item displayed for each Z number, in addition to the remaining number of electronic components, the initial value of the number of electronic components to be set first, and a message for notifying that the component has run out The remaining number of electronic components at the time of displaying is displayed.
[0026]
FIG. 5 is a diagram showing the relationship between each Z number, the number of electronic components remaining at each Z number, and the number of electronic components that can be produced until a component break occurs, calculated from the number of electronic component users in the production of one circuit board. FIG. In FIG. 5, 15 is the number of possible productions based on the remaining number of electronic parts in the priority table, 16 is the number of possible productions based on the remaining number of electronic parts in the spare table, and 17 is the operator from the first occurrence of component breakage during production. The number of circuit boards to be produced using the spare table before the supply table is in a state where the parts can be exchanged at the standby position is notified.
[0027]
FIG. 6 shows an example of a screen for instructing the operator to prepare for the next part replacement work. 18 is the number of circuit boards produced until the parts can be replaced, and 19 is a part replacement target. It is a list of the Z number of the supply table for designating a cassette and its part name.
[0028]
In the first embodiment, the number of cassettes E for parts cut accumulated until notification of parts shortage is given in a fixed manner, but in this embodiment, the operator continues to produce while the parts are out of stock. By giving the number of circuit boards to be used, when the part is first cut out, the number of sheets that can be produced at other Z numbers is equal to or less than the given number of circuit boards. Subject to exchange.
[0029]
For example, in FIG. 5, when the number of circuit boards to be continuously produced is a, and when a component outage occurs first in Z1 (production possible number = 0), the number of production possible for each Z number is less than a. The next part replacement target. If the possible production numbers of Z2, Z3, and Z4 in the priority table are m2, m3, and m4, respectively, and m2 <a, m3 = a, and m4> a, Z1, Z2, and Z3 are the next parts replacement targets.
[0030]
Since the spare table is used together with the production of a circuit boards after the first out of parts, each of the Z numbers in the spare table for mounting the replacement cassette of the cassette to be replaced next time is used. The number of sheets that can be produced needs to be a or more. In the alternative cassette, if there is a Z number for which the number of producible sheets is less than a, there is a part shortage first on the spare table side, so the part shortage notification accumulated at the time of this part replacement operation At the same time, both tables are moved to the standby position to wait for the completion of the parts replacement work.
[0031]
For example, in FIG. 5, assuming that the number of Z1 and Z2 that can be produced in the spare table is n1 and n2, respectively, and n1 <a and n2> = a, the spare table is out of parts while the production of a sheets is continued. In this case, if m2 <n1 <a, the parts in the priority table Z2 have already been out of parts at the time when the parts in the spare table Z1 are out, so the Z1 and Z2 in the priority table and the Z1 in the spare table are included. Notify as out of stock. On the other hand, if m2> = n1, Z2 in the priority table has not yet been out of parts, so Z1 in the priority table and Z1 in the spare table are notified as out of parts.
[0032]
Further, since the cassette to be replaced next time can be specified at the time when the component is first cut out, the operator can be given a preparatory instruction for the component replacement work with the screen example shown in FIG.
[0033]
As described above, according to the present embodiment, by giving the number of circuit boards to be produced from when a part is first cut out to when the actual part replacement operation is performed, productivity is reduced due to the combined operation of both tables. Can be controlled proportionally from this number, it is easy to make settings for optimizing the timing of parts out notification. Further, by displaying a list of cassettes to be replaced next time on the screen, it is possible to improve the operator's work efficiency.
[0034]
【The invention's effect】
According to the component mounting method and apparatus of the present invention, as is apparent from the above description, when the number of types of components that have run out of components reaches a certain upper limit value, the supply table can be replaced, and the operator Because parts are notified of parts being out of order, multiple parts can be replaced at the same time when parts are replaced due to out of parts. The effect that can be greatly reduced.
[0035]
In addition, based on the number of parts that can be supplied and the possible production number calculated from the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the first part failure occurs is set. When the predetermined number of sheets are produced and the supply table is in a state where the parts can be replaced, the part replacement notification can be performed to control the period from the first occurrence of the part to the actual part replacement operation. Therefore, it is possible to improve the efficiency of the parts replacement work while suppressing the decrease in productivity due to the combined operation of the priority table and the spare table within an appropriate range.
[0036]
In addition, if a list of parts to be replaced is displayed in advance before the work for replacing parts that have run out of parts at this time, the operator can be given an appropriate preparation instruction for the next part replacement work. The operator's work efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram related to component replacement processing in a first embodiment of a component mounter of the present invention.
FIG. 2 is a flowchart of a component replacement processing operation in the same embodiment.
FIG. 3 is an explanatory diagram of a screen example displaying a state of a component supply unit in the embodiment.
FIG. 4 is an explanatory diagram of a screen example of a menu for referring to the number of remaining parts of each cassette corresponding to a Z number of a supply table in the second embodiment of the component mounter of the present invention.
FIG. 5 is an explanatory diagram of a screen example that displays the relationship between the Z number of the supply table and the number of products that can be produced until a part shortage occurs in the embodiment;
FIG. 6 is an explanatory diagram of a screen example of a menu for preparing part replacement work in the embodiment.
FIG. 7 is an external perspective view of a general electronic component mounting machine.
FIG. 8 is an explanatory diagram of an operation pattern of a supply table.
FIG. 9 is an explanatory diagram of a program for producing a circuit board.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation control part 1a Operation part 2 Mounting part 3 Board | substrate positioning part 4 Component supply part 5 Component recognition part 6 Component outage information storage part 7 Component replacement judgment part 8 Supply table operation control part 9 Screen display part 10 Component replacement completion process part ZA Supply table ZB Supply table

Claims (6)

A component mounting method for holding a component in a component supply section having a plurality of movable supply tables on which a plurality of component supply means are mounted, moving the component to a mounting position, and mounting the component on the plurality of supply tables Multiple parts supply means are mounted so that the same arrangement is made, the supply table to be used and the supply table to be standby are specified, and this supply table is made to wait automatically when the parts in the supply table to be used are out of stock. In the operation mode in which production is continued by using the standby supply table, when the number of types of parts that have run out of parts reaches a certain upper limit value, the supply table is made in a state where the parts can be replaced, and the parts are informed. The component mounting method characterized by performing. Based on the number of parts that can be supplied and the number of parts that can be calculated based on the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the first part failure occurs is set. 2. The component mounting method according to claim 1, wherein when a predetermined number of sheets are produced, the supply table is in a state in which the components can be replaced and notification of component shortage is given. 3. The component mounting method according to claim 2, wherein a list of components to be replaced is displayed in advance before an operation of replacing a component in which component breakage has occurred. A component supply unit having a plurality of movable supply tables on which a plurality of component supply units are mounted, a mounting unit that holds the components in the component supply unit, moves them to the mounting position, and mounts them, and the board at any mounting position A board positioning unit for positioning, a component supply unit, a mounting unit, and an operation control unit for the board positioning unit are provided. Equipped with supply means, specify the supply table to be used for production and the supply table to be on standby, and use the supply table that is automatically waiting and waiting when this part of the supply table is out of stock. In the operation mode in which production is continued, the supply table can be replaced when the number of parts that have run out has reached a certain upper limit. Component mounting unit, characterized in that a means for performing notification cutting. Based on the number of parts that can be supplied and the number of parts that can be calculated based on the number of parts used per board, a predetermined number of circuit boards to be continuously produced after the first part failure occurs is set. 5. The component mounting apparatus according to claim 4, further comprising means for notifying that the supply table is in a state where the components can be replaced when a predetermined number of sheets are produced. 6. The component mounting apparatus according to claim 5, wherein means for displaying a list of components to be replaced is provided in advance before the operation of replacing a component that has run out of components.

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