JPH0429507B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present description relates to automatic production equipment, and can be used, for example, to improve setup work and improve machining accuracy in a machining center.

[Background technology and its problems]

As a typical automatic production device, it is equipped with a tool change function and uses rotating tools to cut the workpiece.
A so-called machining center is known.

Conventional machining centers are based on the premise of so-called setup work, in which a tool of a certain diameter and its trajectory program are determined for each part of the workpiece to be machined after repeated trial cutting to the target finished dimensions of the workpiece. While storing the tools corresponding to each machining location in a tool magazine, a machining program is created by sequentially arranging each locus program according to the machining procedure, and when one machining location is completed during operation, the machining program The machine switches to the tool and trajectory program suitable for the next machining location, proceeds to the next machining location, repeats these steps in sequence, and then repeats this series of steps for the next workpiece to achieve automatic production. .

Generally, the work processes in machining can be divided into a setup process and a cutting process. Machining centers can be seen as an improvement to the cutting process. In other words, as described above, once a certain workpiece is specified, a tool and a trajectory corresponding to it are automatically determined. This can be seen as a simple change in the cutting process, and therefore the setup process was essentially no different from that of a manual machine.

For example, when machining a certain hole, make a trial cut using a tool that seems to correspond to the target machining value.
The dimensions of the machined hole are inspected, the tool is adjusted based on the inspection results, trial cutting is performed again, and then re-inspected, and these steps are repeated in order to determine a tool with a specific diameter. At this time, in some cases, it may be necessary to prepare a plurality of identical tools in consideration of tool wear and damage. Further, in the case of outside cutting, in addition to the tool determination work, it is necessary to create a trajectory program for moving the tool and workpiece relative to each other. After such setup work, after storing one tool for each machining location in a tool magazine etc., when the dimensions of the cut workpiece become out of the tolerance due to the cutting process on the workpiece, They had to replace each tool or tool magazine.

However, the following problems are inherent in the setup work in such conventional machining centers. That is, an excessive amount of time was wasted on the tool selection work during the setup work. This is because, in most cases, adjustments based on inspection results after trial cutting are made back to the specialized manufacturer. In addition, from the viewpoint of eliminating the need for polishing, etc., a device equipped with an adjustment means has been proposed, but it has rarely been adopted due to accuracy and economical problems.

The tool selection work during the setup work is largely based on experience, leading to a shortage of skilled workers, and variation among people, which is unfavorable in terms of accuracy.

Preparing the same tool required a great deal of cost and time.

During the above setup work, the machining center had to be maintained in that state until the adjusted tool arrived, which also hindered the actual operation of the cutting process. This is because if the machine is operated before the adjustment tool arrives, the tool adjustment may become meaningless, mainly because the machine structural conditions will be different.

Due to these problems, conventional machining centers have had the remarkable effect of saving labor and making the cutting process unmanned, but the setup required a great deal of technical, time, and economic preparation. .

On the other hand, in terms of machining accuracy, there are many technical issues that must be solved in today's world where higher precision machining is required. One of them is
One example of this is that the later the workpiece is machined, the larger the deviation from the target value, although it is still within the tolerance. This is because conventional machining centers are designed to replace the tool with a new one when the number of machining pieces and tool wear reach a predetermined value based on experience, or when a tool breaks.

In order to solve this problem, the idea arises that it would be better to replace the tool with a new one while the production quantity is relatively small, but as is clear from the setup work, it takes a long time to make adjustments because the tool is originally the same one. , it is not practical as it would impose a heavy economic burden.

Furthermore, a concept has arisen that it is sufficient to inspect the workpiece and change the tool trajectory after producing a certain quantity. However, this method requires a huge amount of time and effort and lacks practicality, as the trajectory program must be modified each time.
Moreover, even if this were possible, there is no guarantee that the error will be eliminated even if the vehicle is driven using a modified trajectory program. This is because machining accuracy is determined as a combination of mechanical and electrical factors.
This is because there is an inherent problem in that even if the feed amount and direction of the tool or workpiece is changed, it does not necessarily mean that the machining will be performed with the same characteristics as the previous machining. Therefore, it can be said that it is not practical.

By the way, when inspecting processed workpieces, there are conventional machining centers that allow touch signal probes to be brought in and measured, but with this, errors in the machining center itself affect measurement accuracy, making it difficult to achieve high precision. Measurement is not something that can be expected. Moreover, the workpiece after processing is
Accurate measurement cannot be expected in this state because chips generated by machining are attached to the workpiece or are thermally expanded due to cutting heat. Therefore, the worker must remove the chips and cool the workpiece to a certain temperature before measurement, which places a heavy burden on the worker.

[Purpose of the invention]

Here, an object of the present invention is to automatically remove errors caused by the state of the workpiece itself after processing, measure the workpiece with high precision, and, based on the measurement results, to measure the workpiece without reducing productivity and workability. The object of the present invention is to provide an automatic production device that achieves completely unmanned operation while improving processing accuracy and at the same time improving setup work.

[Means and actions for solving problems]

Therefore, the present invention focuses on the above-mentioned problems of conventional machining centers in that one tool is specified for one machining surface, and that tool is manually adjusted exclusively by skilled workers. Prepare in advance multiple single tools of the same type with slightly different diameters for the machining location, remove chips attached to the workpiece machined by the machine body, and keep the temperature of the workpiece constant for three-dimensional measurement. It is determined by transporting the workpiece to the machine, measuring the machined part of the workpiece with high precision using a three-dimensional measuring machine separate from the main body of the processing machine, and comparing the measured value with the target value (within tolerance and ideal value). The machining error (machining error including all machining center factors) is determined, and based on this machining error, the tool to be used for the next workpiece is automatically selected from among the multiple single tools, and the next workpiece is machined. It is configured to do so.

Specifically, it includes a main body of a processing machine that cuts a workpiece using a rotary tool, a tool magazine that stores specific tools corresponding to each part of the workpiece to be machined, and one specific tool that is taken out from this tool magazine and used for the processing. In an automatic production device equipped with a tool changing means that can be attached to and removed from the machine body, and a control device containing a processing program for operating these processing machine bodies according to predetermined procedures, the workpiece machined by the machine body A chip removal device for removing chips from the workpiece, a temperature control device for bringing the workpiece to a predetermined temperature, a measuring point, a moving mechanism that supports the measuring point movably in three axes orthogonal to each other, and A measuring device body including a displacement detector for each axis for detecting the amount of movement displacement in each axis direction each time the measuring head touches the surface to be measured of the workpiece, and each displacement of the measuring device body. A measurement function that calculates measured values such as the dimensions of the workpiece after machining from the output signal of the detector, an error confirmation function that calculates machining errors by comparing the measured values with preset machining target values, and the tool magazine based on the machining errors. an arithmetic processing unit having a tool selection function for selecting one specific tool from among the specific tools; A conveying means for sequentially conveying to the main body,
and forming specific tools for each machining location stored in the tool magazine as a set of a plurality of single tools of the same type and different diameter dimensions, and outputting from the arithmetic processing unit based on the tool selection function. The tool magazine and the tool exchange means are activated by the tool selection signal, and one of the specific tools is replaced with the single tool attached to the processing machine body, and the pre-machined workpiece is attached to the processing machine body. The present invention is characterized in that the single tool used for the next workpiece is automatically replaced based on the machining error, and the next workpiece is machined.

〔Example〕

FIG. 1 shows an embodiment of the automatic production apparatus of the present invention. The device can be roughly classified into a processing section 1 such as a machining center that processes a workpiece W;
A transport unit 2 transports the workpiece W processed by the processing unit 1, and a transport unit 2 that measures the workpiece W transported by the transport unit 2, and selects a tool for the processing unit 1 based on the measurement results. It can be classified into a measuring section 3 that gives commands.

Further, the processing section 1 includes a processing machine main body 11 that cuts the workpiece W using a rotary tool, and a processing machine main body 11 that cuts the workpiece W using a rotary tool.
A tool magazine 12 that accommodates a plurality of specific tools corresponding to each machining location, and this tool magazine 12
A tool changing device 13 as a tool changing means for taking out one specific tool specified from the processing machine body 11 and attaching and detaching it to the processing machine main body 11, and a tool changing device 13 as a tool changing means for taking out one specific tool designated from The control device 14 has a built-in machining program for operating according to the following procedures.

The processing machine main body 11 has a main shaft 16 that is movable in a three-dimensional direction, that is, in X, Y, and Z axes orthogonal to each other, with respect to a table 15 on which a workpiece W is placed, and that is rotatably driven around the Z axis. Prepare,
and the main shaft 16 receives a drive command from the control device 14.
It is designed to be moved in three-dimensional directions based on DC (x, y, z). The movement position of the main shaft 16 in the three-dimensional direction is detected by a position detector (not shown) (for example, an inductosin, a resolver, etc.), and then sent to the control device 14 as position data P (x, y, z). Feedback is being provided.

Further, as shown in FIG. 2, the tool magazine 12 includes an endless chain 20 that is wound around a plurality of sprockets (not shown), and this chain 20.
A plurality of tool pots 21 are successively connected at regular interval positions, and the chain 20 is driven by a tool selection command from the control device 14 and the measuring section 3, and one of the designated tool pots 21 is replaced with a tool. It includes an indexing device 22 for positioning to position TCP (a position facing the tool changer 13). In each of the tool pots 21, specific tools 23A, B, C, . Each specific tool 23A, B, C...
is constituted as a set of a plurality of single tools of the same kind whose diameters differ from each other by a minute dimension within the tolerance of the machining location of the workpiece W to which the specific tool corresponds.

For example, when machining workpiece W shown in Fig. 7, hole H (target value 20, tolerance 0.1) is
Reamed with 3A, contour S (L ₁ = 150
mm, tolerance 0.1, L ₂ = 100 mm, tolerance -0.1) with the specific tool 23B, the specific tool 23A
are four tools (tool diameter 20.04, 20.05,
20.06, 20.07) reamers 23A ₁ to 23A ₄ , and the specific tools 23B are five pieces with different diameters of 1/100 mm (tool diameter d = 20.00, 20.01,
20.02, 20.03, 20.04) end mill 23B ₁ ~
Consists of 23B ₅ . Additionally, other specific tools
For 23C and 23D, multiple single tools of the same type differing in diameter only by minute dimensions (for example, 6 drills 23C ₁ ~
23C ₆ and four taps 23D ₁ to 23D ₄ , etc.). Here, the first specific tool 23A,
The single tool groups constituting B, C, . . . are housed in order in tool pots 21 within a predetermined range that are continuously connected to the chain 20.

Further, as shown in FIGS. 2 and 3, the tool changer 13 includes a drive device 32 provided movably along a guide rail 31 in the same direction as the X-axis direction of the main shaft 16, and a drive device 32 that drives the main shaft 16. A turning shaft 33 provided on the device 32 so as to be able to move up and down in the same direction as the Z-axis direction of the main shaft 16 and to be able to turn around the Z-axis;
The arm 34 is connected to the lower end of the pivot shaft 33. Holding claws 35 are formed at both ends of the arm 34 to engage with a single tool housed in the tool magazine 12 and a single tool attached to the main shaft 16, respectively.

As a result, the tool changer 13 controls the control device 1.
Based on the tool selection command from 4, the drive device 32 moves to the tool magazine 12 side, holds the tool at the tool change position TCP in the holding claw 35 on the tool magazine 12 side, and then the drive device 32 moves to the tool magazine 12 side.
6 side, the tool attached to the main shaft 16 is held by the holding claw 35 on the main shaft 16 side, and then the arm 34 is lowered and rotated by the rotation shaft 33.
After being reversed 180 degrees, the tool taken out from the tool magazine 12 is held on the spindle 16. In this way, the single tool on the spindle 16 and the single tool on the tool magazine 12 are exchanged with each other by the operation of the tool exchanger 13.

In addition, the control device 14 stores a machining program for operating the machining machine main body 11 etc. according to a predetermined procedure, as well as various programs constituting the specific tools 23A, B, C... housed in the tool magazine 12. Information about the tool for each single tool, such as tool number,
A tool file list is provided that stores the tool name, nominal diameter, material, tool length, etc., and a tool address list is provided that stores which tool pot 21 each single tool is housed in.

Next, the transport section 2 transports the workpiece W processed in the processing section 1 to the measurement section 3, and is constituted by, for example, a transport robot 41 as a transport means. While the workpiece W is being transported from the processing section 1 to the measurement section 3 by the robot 41, there is a chip removal device 42 that removes deposits such as chips adhering to the workpiece W, and a chip removing device 42 that removes deposits such as chips attached to the workpiece W, and A temperature control device 43 is provided for cooling the aged workpiece W to a constant temperature, that is, room temperature. The chip removal device 42 is provided with, for example, an arch-shaped enclosure along the path through which the workpiece W passes, and supplies constant temperature air to the workpiece W from the enclosure by a constant-temperature air-fluid supply device 44. This removes chips and the like adhering to the workpiece W. Further, the temperature control device 43 includes:
A water tank filled with constant-temperature water obtained by the constant-temperature air flow supply device 44 is installed along the conveyance path of the workpiece W that has passed through the chip removal device 42, and while the workpiece W is immersed in this water tank, transport,
This keeps the temperature of the workpiece W at a constant temperature (for example,
20℃).

As shown in FIG. 4, the constant-temperature feng-shui supply device 44 has a bulge 46 formed in the middle of a blow pipe 45 that supplies compressed air to the chip removal device 42. A water supply pipe 48 that supplies constant-temperature water heated to a constant temperature (20° C.) by a water temperature controller 47 to the temperature control device 43 is housed with a middle portion bent into a bellows shape. Water pipe 48
A large number of heat dissipation fins 49 are attached to the bent portions. In addition, the pressure water temperature controller 47
The other end of a return path 50, one end of which is connected to the downstream side of the bulging portion 46 of the water pipe 48, is connected to the other end of the return path 50, and the other end of the return path 50 is connected to a portion of the water pipe 48, to which one end of the return path 50 is connected A signal from a water temperature sensor 51 that detects the water temperature on the upstream side is given. This causes the pressure water temperature controller 47 to control the water temperature sensor 5.
Depending on the temperature of the water coming out of the water pipe 48 detected in step 1,
The temperature is adjusted so that the temperature of the water flowing through the water pipe 48 is maintained at, for example, 20°C. Therefore, the compressed air supplied into the bulging portion 46 is also kept at a constant temperature by heat radiation from the hot water flowing through the water pipe 48.

Next, the measuring section 3 uses a three-dimensional measuring machine 61 as a measuring machine main body for measuring the workpiece W transported by the transporting section 2, and a dimension from the measurement data measured by this three-dimensional measuring machine 61. etc., and outputs a tool selection command to the tool magazine 12 of the processing section 1 based on the machining error with respect to the machining target value of the dimension, and the dimension etc. determined by the arithmetic processing device 62. and a display storage device 63 that displays and stores the measured values of.

The three-dimensional measuring machine 61, as shown in FIG.
A column 73 is provided on both sides of the surface plate 71 on which the workpiece W is placed via guide rails 72 in the front-rear direction (Y-axis direction) with respect to the surface plate 71, and two slider guides are provided at the upper part between the two columns 73. A slider 75 moves in the left-right direction (X-axis direction) with respect to the surface plate 71 via a rail 74, and a spindle 7 has a touch signal probe 76 as a measuring element at the lower end of the slider 75.
7 in the vertical direction (Z-axis direction) with respect to the surface plate 71
They are each movable.

As a result, when the touch signal probe 76 is moved in the three-dimensional direction via the moving mechanism 78 consisting of the support 73, the slider 75, and the spindle 77, the position of the touch signal probe 76 in the X-axis direction is adjusted between the slider guide rail 74 and the slider. The position in the Y-axis direction is determined by the X-axis displacement detector 81 (see FIG. 6) provided between the guide rail 72 and the support column 73.
(see Fig. 6), and the position in the Z-axis direction is further detected by the Z-axis displacement detector 83 (see Fig. 6) provided between the slider 75 and the spindle 77, and then the arithmetic processing is performed. to device 62.

As shown in FIG. 6, the arithmetic processing unit 62 has an input signal that is measured by the X, Y, and Z axis displacement detectors 81, 82, and 83 when the touch signal probe 76 is turned on due to contact with the workpiece W. Process the data. The data processed by the measurement data processing circuit 91 is stored in the display storage device 63 and digitally displayed, while being supplied to the error discrimination circuit 92.

The error determination circuit 92 compares the data obtained by the measurement data processing circuit 91 with the machining target value stored in advance in the reference value storage circuit 93, and provides the machining error to the tool selection circuit 94. In the reference value storage circuit 93, machining target values are preset for each machining location of the workpiece W. For example, when machining workpiece W shown in Fig. 7, the machining target value for hole H is 20.05.
mm, machining target value of contour S L ₁ = 150.05 mm, L ₂ =
99.95mm is preset.

Further, the tool selection circuit 94 stores in advance the deviation of the tool diameter from the machining target value corresponding to the tool number of each tool stored in the tool magazine 12. The tool selection circuit 94 selects a tool number that cancels out the machining error based on the machining error given from the error discrimination circuit 92, and outputs the tool number to the tool magazine 1 via the output circuit 95.
Feedback to 2. This allows the tool magazine 12 to process the next workpiece W.
In a state where any specific tool is positioned in advance at the tool change position TCP according to a command from the control device 14, the single tool with the tool number selected by the tool selection circuit 94 among the specific tools is positioned at the tool change position TCP. Position it so that it will come out. the result,
The single tool positioned at the tool change position TCP is used for machining the next workpiece W.

Next, the operation of this embodiment will be explained. First, the workpiece W is placed on the table 15 of the processing machine main body 11 in the processing section 1.
When the control device 14 is started after the above setting, the main shaft 16 of the processing machine main body 11, the tool magazine 12, and the tool changer 13 are driven according to a machining program stored in the control device 14 in advance. For example, when reaming a hole H in a workpiece W, first the tool magazine 12 rotates to ream the hole H.
One of the specific tools 23A corresponding to the machining location, for example, the reamer 23A ₂ , is at the tool exchange position.
After being positioned to the TCP and then the single tool 23A ₂ is attached to the spindle 16 by the tool changer 13, the workpiece W is processed by movement of the spindle 16. After the machining is completed, the rotation of the tool magazine 12 positions one single tool from among the specific tools 23B corresponding to the next machining location, that is, the contour S, for example, the end mill 23B ₃ , to the tool exchange position TCP,
Subsequently, the single tool _23B3 is attached to the main spindle 16 by the tool changer 13, and then the workpiece W is processed by movement of the main spindle 16. In this way, multiple steps of machining are automatically performed on the workpiece W based on the machining program preset in the control device 14.

While the work W processed by the processing machine main body 11 is being transported by the transport section 2, the chips adhering to the work W are first removed by the chip removal device 42, and then the chips are removed by the temperature control device. After the temperature of the workpiece W is kept constant, for example, 20° C., by the device 43, the workpiece W is transported to the measuring section 3.

The workpiece W transported to the measuring section 3 has its dimensions measured at a processing location by a three-dimensional measuring machine 61 . To do this, after setting the workpiece W on the surface plate 71, the touch signal probe 76 is moved in a three-dimensional direction via the moving mechanism 78, and brought into contact with the processing locations of the workpiece W in sequence. Then, when the touch signal probe 76 is turned on due to contact with the workpiece W,
The data of the X, Y, and Z axis displacement detectors 81, 82, and 83 are sent to the measurement data processing circuit 91 of the arithmetic processing unit 62.
be taken into.

The measurement data processing circuit 91 determines the dimensions of the processed area from these data, and displays this on the display storage device 6.
3 is stored and digitally displayed, while being supplied to the error discrimination circuit 92. The error determination circuit 92 compares the data given from the measured data processing circuit 91 with the machining target value for each machining location preset in the reference value storage circuit 93, calculates the machining error, and calculates the machining error. It is applied to the selection circuit 94. The tool selection circuit 94 selects a tool number that reduces the machining error given by the error determination circuit 92 and supplies it to the tool magazine 12 via the output circuit 95.

For example, the specific tool 23 is used for machining a hole H in a workpiece W.
Assuming that the actual measured value when machining using the A reamer 23A ₂ is 0.01 mm smaller in diameter than the machining target value, the tool selection circuit 94 determines that the machining error is set to a certain reference value (for example, between each single tool). If it exceeds the machining target value, select the reamer _23A3 whose diameter is 0.01 mm larger than the machining target value, and give its tool number to the tool magazine 12. As a result, when machining the hole H of the next workpiece W, the reamer 23A ₂ of the tool magazine 12 is first moved to the tool change position TCP by a command from the control device 14.
After the reamer 23A3 is positioned at the tool change position, a tool selection command from the tool selection circuit 94 moves the reamer _23A3 to the tool exchange position.
Positioned to TCP. After this, the tool change position
The reamer _23A3 positioned at the TCP is attached to the spindle 16 via the tool changer 13 and used for the next machining. In this way, based on the machining error with respect to the machining target value of the previously machined workpiece W, a single tool that reduces the machining error is used for machining the next workpiece W.

Therefore, according to this embodiment, the dimensions of the previously machined workpiece W are measured, the dimensions are compared with the machining target value of the relevant machining location, and the single tool with the diameter that reduces the machining error is selected as follows. Since the selection is made when machining the relevant machining location of the workpiece W, the control device 14
It is possible to perform machining close to target values without changing the machining program stored in the machine. This eliminates the need for time and effort associated with changing machining programs, and allows continuous operation without causing fluctuations in the mechanical and electrical characteristics of the machining center, which are determined by a variety of complex factors, eliminating machining errors. It is possible to process high-quality products with small dimensional variations regardless of the processing order.

This has the advantage of saving the effort of making corrections during machining in consideration of the amount of tool wear.

In addition, during setup work, there is no need to prepare a large number of tools with the same diameter as in the past, and there is no need for repeated trial cutting work that requires skill, so setup work is quick and easy. Economical. Therefore, all of the above-mentioned problems, which were troublesome and inefficient when using conventional machining centers, can be solved. Moreover, the fact that there is no need to use tools of the same diameter has the advantage that even if each tool wears out during machining, it can be used for other machining locations.

Furthermore, as a result of feeding back the measurement results from the measuring section 3 to the processing section 1, completely unmanned operation is also possible. Moreover, as a feedback signal,
Since the tool number is selected by the arithmetic processing unit 62, it is easy to transmit and process signals, and there is an advantage that the equipment can be configured extremely simply.

Further, since the work W processed in the processing section 1 is transported to the measurement section 3 by the transport means 41, if the measurement section 3 is automated, the entire process can be operated unmanned. Moreover, during transportation,
Since the chip removal device 42 and the temperature control device 43 are provided, the workpiece W measured by the measurement unit 3 is free of chips and the like and has a constant temperature, so highly accurate measurement can be expected.

Further, since the workpiece W is measured by the three-dimensional measuring machine 61, the dimensions of the processed portion of the workpiece W can be measured with high precision. Moreover,
Since the processing system and measurement system are separate, it is possible to perform more accurate measurements without being affected by errors in the processing system, compared to, for example, a system in which the measurement function is provided within the processing system. Therefore, even when feeding back the tool number to the control device 14, the selection of the tool can be performed accurately and precisely.

In this embodiment, the processing section 1 has been described as a machining center, but it is equipped with a function to automatically exchange a plurality of tools with respect to the main shaft of the processing machine main body.
Any machine tool may be used as long as it can automatically control the movement locus of the main spindle. In addition, the processing machine main body 1
1, the main axis 16 is not only in the three-dimensional direction but also in the Y direction.
It may be constructed so that it can be displaced in the vertical direction using the shaft as a fulcrum. Furthermore, although single tools are continuously stored in the tool magazine 12 for each specific tool, for example, a disk capable of storing a plurality of single tools is rotatably attached to the chain 20 of the tool magazine 12, and the same type of tools are stored on this disk. Each single tool is stored,
The disks of a specified tool group may be positioned at the tool exchange position by a command from the control device 14, and the angle of the disks may be determined by a command from the arithmetic processing device.

In addition, the means for transporting the workpiece W processed in the processing section 1 to the measuring section 3 may not be carried out automatically, but may be carried by a crane or the like operated by a person. In this case, if the chip removal device 42 and the temperature control device 43 are installed in the middle of the movement trajectory of the crane and the workpiece W is temporarily stopped at these positions, the chip removal device 42 and the temperature control device 43 can be installed. The functions of the control device 43 are not obstructed.

In addition to the manual three-dimensional measuring machine described in the above embodiment, the measuring machine itself may be an automatic three-dimensional measuring machine that automatically moves the touch signal probe 76 according to a preset trajectory program. A measuring device may also be used. Furthermore, instead of fixing the support column 73, the surface plate 71 is made movable in the Y-axis direction, and a plurality of touch signal probes suitable for each processing location of the workpiece W can be attached and detached in advance to a part of the surface plate 71. While automatically controlling the movement of the spindle 77 in the Z-axis direction, the slider 75 in the X-axis direction, and the surface plate 71 in the Y-axis direction, Kara work W
By using a three-dimensional measuring machine configured to select a probe suitable for the measurement location and automatically attach it to the spindle 77, it is possible to automatically measure all the processing locations.

In addition, when selecting a single tool based on the machining error obtained from the measured value and the machining target value, it is limited to selecting a single tool with a diameter that reduces the machining error as described in the above example. First, for example, the order in which the single tools are used may be determined in advance, and when the machining error exceeds a certain range, the single tools may be selected in accordance with the determined order.

Further, in the above embodiment, the tool magazine 12 is driven by the tool selection command from the tool selection circuit 94, but the tool selection command from the tool selection circuit 94 is given to the control device 14, and the tool selection command from the control device 14 is driven. The tool magazine 12 may be driven by a command.

〔Effect of the invention〕

As described above, according to the present invention, errors caused by the state of the workpiece itself after machining are automatically removed, the workpiece is measured with high precision, and the machining error calculated from the measured value and the target value is simply calculated. Since the tool is selected,
It is possible to provide an automatic production device that can perform highly accurate processing without reducing productivity and workability, can optimize setup work, and can also achieve completely unmanned operation.

[Brief explanation of drawings]

The figures show one embodiment of the automatic production device of the present invention, and Fig. 1 is a block diagram showing the overall configuration, and Fig. 2 is a block diagram showing the overall configuration.
The figure is a plan view showing an overview of the tool magazine, Figure 3 is a diagram showing the relationship between the tool changer and the control device, Figure 4 is a diagram showing the constant temperature feng shui supply device, and Figure 5 is a diagram showing the coordinate measuring machine. A perspective view, FIG. 6 is a block diagram showing an arithmetic processing device, and FIG. 7 is a diagram showing an example of machining a workpiece. 11... Processing machine main body, 12... Tool magazine, 1
3... Tool changing device as tool changing means, 14...
Control device, 23A, B, C...Specific tool, 23A ₁ ~
23A ₄ ...Reamer as a single tool, 23B ₁ to 23B ₅ ...End mill as a single tool, 23C ₁ to 23C ₆ ...Drill as a single tool, 23D ₁ to 23D ₄ ...Tap as a single tool, 41...As a conveyance means transport robot,
42... Chip removal device, 43... Temperature control device, 61
...Coordinate measuring machine as a measuring machine main body, 62... Arithmetic processing unit, 76... Touch signal probe as a measuring element, 78... Movement mechanism, 81... X-axis displacement detector,
82...Y-axis displacement detector, 83...Z-axis displacement detector.

Claims (1)

[Scope of Claims] 1. A processing machine main body that cuts a workpiece with a rotating tool, a tool magazine that stores specific tools corresponding to each processing location of the workpiece, and a machine that takes out one specific tool from this tool magazine. In an automatic production device equipped with a tool changing means that is attached to and detached from the processing machine main body, and a control device containing a processing program for operating the processing machine main body etc. in a predetermined procedure, A chip removing device for removing chips from a workpiece that has been removed; a temperature control device for keeping the workpiece at a predetermined temperature; a measuring point; A measuring device body including a mechanism and a displacement detector for each axis for detecting the amount of movement displacement in each axis direction each time the measuring head touches the surface to be measured of the workpiece; A measurement function that calculates measured values such as dimensions of the workpiece after machining from the output signals of each displacement detector, an error confirmation function that calculates machining errors by comparing the measured values and preset machining target values, and a function that calculates machining errors based on machining errors. an arithmetic processing unit having a tool selection function for selecting one tool from among specific tools in a tool magazine; a conveying means for sequentially conveying the tool to the main body of the measuring machine, and forming a specific tool for each machining location stored in the tool magazine as a set of a plurality of single tools of the same type and different diameters; Based on the selection function, the tool magazine and the tool changing means are operated with a tool selection signal output from the arithmetic processing unit, and one of the specific tools is changed to the single tool attached to the processing machine body. The single tool is attached to the main body of the processing machine, and the single tool used for the next workpiece is automatically replaced based on the machining error of the previously machined workpiece, and the next workpiece is machined. Automatic production equipment.