JPH10263986A - Work machining method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve machining accuracy and decrease the occurrence of a defective product by machining a portion into the range of a tolerance again when the measured value of the machined portion after machining lies outside of the tolerance. SOLUTION: When the measured value of a machined portion lies outside of a tolerance after machining, a program for corrective machining is transferred to the control device 14 of a finishing machine 12 from a management device 16, the machined portion is again machined, the machining accuracy is improved and the occurrence of a defective product is decreased. A one-item production work having multiple machining portions can be easily coped with, i.e., the management device 16 and control device 14 function as control device means. Since the prescribed-program is transferred to the finishing machine 12 side from the upper-level management device 16 for machining and measurement, the program is prepared more efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work processing method and apparatus for measuring the size of a processed part after processing the work.

[0002]

2. Description of the Related Art A related work processing apparatus is described in Japanese Patent Application Laid-Open No. 61-188006.
This processing device measures the dimensions of a processed work, and automatically changes a tool to be used for a work to be processed next based on the processing error. Thereby, the processing accuracy of the work to be processed next can be improved.

[0003]

However, according to the above-described work processing apparatus, even if a processing error of a predetermined work is large, there is no feedback to the work, and as a result, a work having a large processing error exists as it is. Will do. For this reason, it is not possible to cope with the work of one-piece production. In view of the above, according to the first and second aspects of the present invention, the dimensions of a processing portion of a workpiece are measured during processing, and reprocessing of the processing portion can be performed according to the measurement result. It is an object of the present invention to be able to cope with a work of one-piece production and to improve the processing accuracy of the work. A third object of the present invention is to efficiently process and measure a workpiece in addition to the objects of the first and second aspects of the present invention.

[0004]

The above-mentioned object is achieved by a method and an apparatus for processing a work having the following features. That is, in the method of processing a work according to claim 1, after processing a predetermined portion of the work, the dimensions of the predetermined portion are measured, and when the measured value is out of the tolerance,
The predetermined portion is processed so as to fall within the range of the tolerance.

According to the present invention, if the measured value of a processed part is out of the tolerance after the processing, the processing of the part is performed so as to fall within the tolerance, so that the processing accuracy is improved and Non-defective products are also reduced. Further, it is possible to cope with a case where a plurality of processing parts exist in one work.

According to a second aspect of the present invention, there is provided a processing means for processing a work, a measuring means for measuring a dimension of a predetermined part of the processed work, and a measurement value of the predetermined part measured by the measuring means. Determining means for determining whether or not is within a tolerance range, and, when the measured value is out of the tolerance, processing of a predetermined portion of the workpiece by the processing means so as to fall within the tolerance range. Control means for performing the control.

According to the present invention, after processing a predetermined portion of the work by the processing means, the dimension of the predetermined portion is measured by the measuring means, and when the measured value is determined to be out of the tolerance by the determining means, The predetermined portion can be machined so as to fall within the range of the tolerance by the operation of the control means and the machining means. That is, according to the present invention, claim 1
Can be implemented.

[0008] Further, the invention described in claim 3 is based on claim 2.
In the work processing apparatus described in the above, the machine side device that operates the processing means and the measuring means according to the transferred program, and outputs the progress status information of the program and the judgment information of the judging means; A management device for registering a program for operating the means, and for transferring a predetermined program to the machine side device based on the progress information of the program from the machine side device and the determination information. .

According to the present invention, a program for processing and measurement is registered in the machine side device because a predetermined program is transferred from the upper management device to the machine side device to operate the processing means and the measuring means. This makes it easier to create a program than if you had done this. Further, even when a plurality of processing parts exist in a work, the order of processing and measurement can be freely set according to the type of the work. For this reason, it is possible to perform machining of related parts continuously, and then continue measurement of those parts, and then correct only those parts whose measured values are out of tolerance, thereby improving machining and measurement efficiency. Is improved. Also, when a plurality of machine-side devices are connected to a higher-level management device for operation, only one set of programs is required, so that management of the programs becomes easier.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and an apparatus for processing a work according to an embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 shows an overall configuration diagram of a processing apparatus according to the present embodiment. The present processing apparatus 10
A processing machine 12 is provided for cutting a plurality of portions of the work w and measuring the dimensions of the cut portions.
The processing machine 12 has a three-dimensionally movable main spindle 12m (see FIGS. 1 and 5), and performs cutting of a workpiece w by mounting a cutting tool 12c on the main spindle 12m. can do. In addition, by mounting the measuring tool 12s on the main shaft 12m and moving the main shaft 12m three-dimensionally, it is possible to measure the dimensions of the cut portion.

On the machine side of the processing machine 12, the processing machine 1
2, a control device 14 for directly controlling the terminal 2, a program terminal 15a, and a data transmitting / receiving terminal 15b are provided.
The program terminal 15a transmits a program transfer request signal from the control device 14 to the upper management device 16, receives the program transferred from the management device 16, and supplies the program to the control device 14. In addition, the data transmission / reception terminal 15b functions to transmit / receive various information such as status information and measurement data of the processing machine 12 between the control device 14 and the management device 16. The program terminal 15
a, LAN between the data transmitting / receiving terminal 15b and the management device 16
The program terminal 15a and the data transmitting / receiving terminal 15b are connected by a dedicated communication line. That is, the control device 14, the program terminal 15
a and the data transmission / reception terminal 15b correspond to the machine-side device of the present invention, and the processing machine 12 corresponds to the processing means and the measurement means.

The management device 16 is a device that receives information on the processing machine 12 and manages the state of the processing machine 12 and the progress schedule of processing and measurement. The management program 16 includes a processing program and a measurement program registered in accordance with the progress schedule. Is transferred to the processing machine 12 and various data are transmitted and received. The processing machine 12 has a program terminal 15a
It operates in accordance with the program supplied to the control device 14 via the CPU and processes and measures the work w. Here, the machining program and the measurement program registered in the management device 16 are supplied from the host system 18. The management device 16 and the host system 18 are also connected by a LAN.

Next, a method of processing a workpiece according to the present embodiment will be described with reference to FIGS. Prior to processing the work w, first, a processing program, a measurement program, and a correction processing program for a necessary part according to the type of the work w are supplied from the host system 18 to the management device 16 and registered in the management device 16. . Next, as shown in FIG. 2, the management device 16 sets a schedule for temporarily determining the execution order of each program. For example, in the case of the current work w, a schedule is set in the order of the part 1 to part 3 processing program, the part 1 to part 3 measurement program, the part 4 processing program... Further, the machining program, the modified machining program, and the measurement program are associated with each other for each part.

Further, in the execution of the schedule, a “machining state” indicating a progress state of the schedule is provided for each program. Note that the term “machining state” is used for convenience in a measurement program actually used for measurement. In the processing state, "waiting for processing",
There are five states: "waiting for rework", "waiting for remeasurement", "processing completed", and "accuracy assurance". "Waiting for processing"
It refers to a state of waiting for the execution of the machining program, the measurement program, and the correction machining program. “Machine completion” refers to a state in which execution of the machining program, the measurement program, and the correction machining program has been completed. “Waiting for rework” refers to the state of the measurement program when the measurement program is executed and the measurement result becomes NG (defective). Note that NG in this case refers to a case where correction processing is possible, and does not include a case where correction processing is impossible such as excessive cutting. "Accuracy guarantee"
Means the state of the machining program and the modification machining program related to each part when the measurement program is executed and the measurement result is NG. “Waiting for re-measurement” refers to the state of the measurement program associated with each part immediately after re-machining by the machining program and the modified machining program.

When the schedule is set in the management device 16 in this manner, the work w is processed based on the flowcharts of FIGS. First, in step 101 of FIG. 3, the program at the head of the schedule, that is, the processing information of the part 1 processing program is read. In the initial state, as shown in FIG. 2, all the programs are in the “waiting for processing” state, and the schedule has not been completed.
Since the part 1 machining program is not a measurement program, and there is no condition of keeping described later,
15, the processing from step 116 to step 121 is executed, the part 1 machining program is determined by this program, and the processing ends. Thereby, the part 1 processing program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, as shown in FIG. 5A, cutting of the part 1 of the work w is performed based on the transferred part 1 processing program.

Then, when the part 1 machining program ends, the processing of the flowchart in FIG. 4 is started. Since the program is a machining program, the processing from step 201 to step 207 is executed. Since the state of the part 1 machining program is currently “waiting for machining”, the process proceeds from step 207 to step 209, where the state is changed to “machining completed” and the process ends. Next, the management device 1
In step 6, as described above, in step 101 (see FIG. 3), the program at the head of the schedule, that is, the processing information of the part 1 processing program is read. However, in this state, since the state of the part 1 processing program is “processing completed”, the state check is “other”,
Steps 102 to 105 are executed,
In step 105, the processing information of the next program is read.

The next program is a part 2 machining program, which is in a "waiting for machining" state.
Steps 102, 103 and 114 to 114 are executed, the part 2 machining program is determined by this program, and the processing ends. Thereby, the part 2 is moved from the management device 16 to the processing machine 12 side.
The transfer of the machining program becomes possible. In the processing machine 12, cutting of the part 2 of the work w is started based on the transferred part 2 processing program. That is, when the cutting of the part 1 of the work w is completed, the state of the part 1 processing program becomes “processing completed”, and the cutting of the part 2 of the work w is started based on the part 2 processing program. This state is timing I in FIG. Similarly, when the cutting of the part 2 of the work w is completed, the state of the part 2 processing program is changed to “processing completed”, and the cutting of the part 3 of the work w is started based on the part 3 processing program. . Then, when the cutting of the part 3 of the work w is completed, the state of the part 3 processing program is changed to “processing completed”.

Next, in the management device 16, as described above,
The processing of steps 101 (see FIG. 3) to step 105 is executed, and the part 1 measurement program in the “waiting for processing” state is selected. Then, for the selected part 1 measurement program, steps 114 to 11
5. The processing of step 122 is executed, the part 1 measurement program is determined by this program, and the processing ends. As a result, the part 1 measurement program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, based on the transferred part 1 measurement program, as shown in FIG.
Of the part 1 is started. This state is timing II in FIG.

Then, when the part 1 measurement program ends, the processing of the flowchart in FIG. 4 is started, and it is determined in step 202 whether or not the measurement result is within the tolerance.
Here, whether or not the measurement result is within the tolerance is determined by the control device 14 of the processing machine 12, and the determination result is transmitted to the management device 16 together with the measurement data. That is, the control device 14 functions as the determination means of the present invention. If the result of the determination is NG (defective), the state of the part 1 measurement program is set to "waiting for rework" (step 203). In step 204, the return program of the part 1 measurement program, that is, the state of the part 1 processing program is changed from "processing completed" to "accuracy guaranteed".

Next, in the management apparatus 16, step 101
At (see FIG. 3), the program at the head of the schedule, that is, the machining information of the region 1 machining program is read.
As described above, since the state of the part 1 machining program is “accuracy guaranteed”, it corresponds to the “other” state, and the process proceeds to steps 102 to 105, where the next program in the schedule is read. Since the state of the next program, that is, the state of the part 2 machining program or the part 3 machining program is “processing completed”, the processing of steps 102 to 105 is repeated. Furthermore, the status of the next program, the part 1 measurement program, is "Waiting for rework".
Therefore, the processing of step 102, step 103 to step 106 is executed.

In this state, since the part 1 measurement program is not kept, steps 107 to 11
0 processing is executed, and the part 1 measurement program is kept in the “waiting for rework” state. Then, Step 105
Then, the state of the site 2 measurement program, which is the next program, is read. Since the state of the part 2 measurement program is “waiting for processing”, this program is selected in step 103 as a result. Then, the processing of steps 114 and 115 to step 122 is executed for the selected part 2 measurement program, the part 2 measurement program is determined as this program, and the processing ends. Thereby, the part 2 measurement program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, measurement of the part 2 of the work w is started based on the transferred part 2 measurement program. This state is timing III in FIG.

When the part 2 measurement program ends, the processing of the flowchart in FIG. 4 is started, and it is determined in step 202 whether or not the measurement result is within the tolerance. If the result of the determination is NG (defective), the state of the part 2 measurement program is set to "waiting for rework" (step 203).
Further, in step 204, since the return program of the part 2 measurement program, that is, the dedicated correction processing program exists in the case of the part 2, the state of the part 2 correction processing program changes from “waiting for processing” to “accuracy assurance”. Be changed.

Next, in the management device 16, as described above, the part 3 measurement program whose state is "waiting for processing" is selected in step 103, and the part 3 measurement program is subjected to steps 114 and 115 to step 12
Step 2 is executed, the part 3 measurement program is determined by this program, and the processing ends. Thus, the part 3 measurement program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, the measurement of the part 3 of the work w is started based on the transferred part 3 measurement program. This state is the timing IV in FIG.

When the part 3 measurement program ends, the process of the flowchart in FIG. 4 is started, and it is determined in step 202 whether the measurement result is within the tolerance. When the determination result is G (good), the state of the part 3 measurement program is set to "processing completed" (step 205), and the return program of the part 3 measurement program, that is, the state of the part 3 processing program is set to "processing completed". ".

Next, in the management device 16, as described above, the part 4 machining program whose state is "waiting for machining" is selected, and step 11 is executed for the part 4 machining program.
4. Step 115 is executed. Since the part 4 machining program is not a measurement program and further has a keep of “waiting for rework”, the processing of step 116, step 117, and step 120 is executed, and the return destination of the kept part 1 measurement program is The part 1 machining program, which is a program, is determined as this program.

As a result, it is possible to transfer the part 1 machining program from the management device 16 to the control device 14 of the machining machine 12. At this time, the management device 16
Therefore, the change information of the offset amount of the length and the diameter of the tool can also be transmitted to the control device 14 of the processing machine 12. In the processing machine 12, re-cutting of the part 1 of the work w is started based on the part 1 processing program and the change information of the offset amount such as the length of the tool, as shown in FIG. 5C. This state is the timing V in FIG. And
When the part 1 machining program ends, the processing of the flowchart of FIG.
07 is executed. Since the state of the part 1 machining program is “accuracy guaranteed”, the state of the part 1 measurement program is changed from “waiting for rework” to “waiting for remeasurement” at step 208, and the state of the part 1 machining program is changed to “waiting for remeasurement” at step 209. Processing Completed ".

Next, in the management device 16, since the status of the part 1 measurement program is "waiting for re-measurement",
03, step 111, step 112, step 11
The processing of No. 3 is executed, and the part 1 measurement program is kept in the “waiting for re-measurement” state. Next, since the part 2 measurement program is in the “waiting for rework” state, step 1
03, step 106, step 107, step 11
0 is executed, and the part 2 measurement program is kept in the “waiting for rework” state. Next, the part 4 machining program “waiting for machining” is selected again, and the processing of steps 114 and 115 is executed for the part 4 machining program. At this stage, since the part 2 measurement program is kept in the “waiting for rework” state, step 11
6, the processing of steps 117 and 120 is executed, and the part 2 correction machining program, which is the return destination program of the part 2 measurement program, is determined as this program.

As a result, the part 2 correction machining program can be transferred from the management device 16 to the control device 14 of the machine 12. In the processing machine 12, as shown in FIG. 5C, re-cutting of the part 2 of the work w is started based on the part 2 correction processing program. This state is the timing VI in FIG. And part 2
When the correction machining program ends, the processing of the flowchart in FIG.
7 is executed. Since the state of the part 2 correction machining program is “accuracy guaranteed”, the step 2
The state of the measurement program is changed from “waiting for re-machining” to “waiting for re-measurement”, and at step 209, the state of the part 2 correction machining program is set to “machining completed”.

Next, the management device 16 selects again the part 4 machining program whose state is "waiting for machining", and executes steps 114 and 11 for the part 4 machining program.
5. The processing of step 116 is executed. At this stage, since there is a keep of “waiting for re-measurement”, step 11
7. The process of step 118 is executed, and the state of all “waiting for re-measurement”, that is, the state of “waiting for re-measurement” of the part 1 measurement program and the part 2 measurement program is changed to “processing wait”. Then, the kept site 1 measurement program is determined as the main program.

As a result, the part 1 measurement program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, as shown in FIG. 5B, measurement of the portion 1 of the work w is performed based on the measurement program. This state is the timing VII in FIG. Then, when the part 1 measurement program ends, step 20 in the flowchart of FIG.
1. The processing of Step 202 is executed, and Step 202
It is determined whether or not the measurement result is within the tolerance. If the determination result is G (good), the state of the part 1 measurement program is set to “processing completed” (step 205), and
The return program of the measurement program, that is, the state of the region 1 machining program is set to “machining completed” (step 2).
06).

Next, the management device 16 selects a part 2 measurement program whose state is "waiting for processing", and executes step 114 and step 1 for the part 2 measurement program.
15. The processing of step 122 is executed, and the part 2 measurement program is determined as the main program.

Thus, the part 2 measurement program can be transferred from the management device 16 to the control device 14 of the processing machine 12. In the processing machine 12, as shown in FIG. 5B, the measurement of the part 2 of the work w is performed based on the measurement program. This state is the timing VIII in FIG. Then, when the part 2 measurement program ends, step 20 in the flowchart of FIG.
1. The processing of Step 202 is executed, and Step 202
It is determined whether or not the measurement result is within the tolerance. If the determination result is G (good), the state of the part 2 measurement program is set to “processing completed” (step 205), and
The state of the return program of the measurement program, that is, the state of the part 2 correction processing program is set to “processing completed”.

Next, the management device 16 selects a part 4 machining program whose state is "waiting for machining", and executes steps 114 and 11 for the part 4 machining program.
5. The processing of step 116 is executed. Since there is no keep at this stage, the part 4 machining program is determined to be this program in step 121. by this,
The part 4 processing program can be transferred from the management device 16 to the control device 14 of the processing machine 12. Processing machine 12
Then, based on the part 4 machining program, the part 4 of the work w
Is started. This state is the timing IX in FIG. When the cutting of the part 4 is completed, as described above, the part 4 correction program (not shown)
The measurement of the part 4 of the work w is performed based on.

In this way, when there are no programs in the state of "machining waiting", it is determined in step 102 that the schedule is completed, and the processing of steps 123 to 127 is executed. Then, if there is a measurement program in a state of “waiting for rework” at this stage, rework and remeasurement of a portion corresponding to the measurement program are performed as described above,
When the determination result is G (good), all the processing of the work w is completed.

As described above, according to the work processing method of the present embodiment, when the measured value of the processed part is out of the tolerance after the processing, the management device 16 sends the measured value to the control device 14 of the processing machine 12. Since the program for the correction processing is transferred and the processing part is re-processed, the processing accuracy is improved and the occurrence of defective products is reduced. further,
It is easy to cope with a single-product production work in which a plurality of processing parts exist. That is, the management device 16 and the control device 14 function as control means of the present invention.

Further, since a predetermined program is transferred from the upper management device 16 to the processing machine 12 to perform processing and measurement, a processing program, a measurement program, and a measurement result determination program are stored in the processing machine 12. Compared to the case of registering a change program of a machining condition, a correction program, a command program to return to re-machining, etc. and performing a correction machining,
It is sufficient to prepare the measurement program alone, and the preparation of the program can be performed more efficiently. Further, even when a plurality of processing parts exist in a work, the order of processing and measurement can be freely set according to the type of the work.
For this reason, it is possible to perform machining of related parts continuously, and then continue measurement of those parts, and then correct only those parts whose measured values are out of tolerance, thereby improving machining and measurement efficiency. Is improved. Also, when a plurality of machine-side devices are connected to the higher-level management device 16 for operation, only one set of programs is required, so that management of the programs is facilitated.

Further, like the part 1 of the work w, the machining program can be used as it is and the length of the tool used for the processing or the offset amount of the diameter can be changed to perform the correction processing. It is also possible to use a program dedicated to correction processing as shown in FIG. In addition, when performing the correction processing based on the measurement result, it is conceivable that the correction processing is repeatedly performed without an error due to the measurement result converging.
In order to prevent this, the number of times of correction processing can be set. Although FIG. 5 shows the processing of the bottom surface of the cutting tool, it is needless to say that the side processing of the cutting tool is also possible.

[0038]

According to the present invention, if the measured value of a processed part is out of the tolerance after the processing, the part is processed so as to fall within the tolerance, so that the processing accuracy is improved and And the occurrence of defective products is reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a work processing apparatus according to an embodiment of the present invention.

FIG. 2 is a processing step diagram illustrating a method of processing a workpiece according to one embodiment of the present invention.

FIG. 3 is a flowchart I showing a work processing method according to an embodiment of the present invention.

FIG. 4 is a flowchart II showing a work processing method according to an embodiment of the present invention.

FIG. 5A is a side view showing a cutting state of a work, FIG. 5B is a side view showing a measurement state of the work, FIG.
(C) is a side view showing the re-cutting state of the work.

[Explanation of symbols]

 w Work 10 Work processing device 12 Processing machine (processing means, measuring means) 14 Control device (machine side device, control means) 15a Program terminal (machine side device) 15b Data transmission / reception terminal (machine side device) 16 Management device (control means ) 18 Host system

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Koji Kito, Inventor 1-1, Asahi-cho, Kariya-shi, Aichi, Japan Toyota Koki Co., Ltd. (72) Inventor Yukio Taki 1-1, Asahi-cho, Kariya, Aichi, Japan Toyota Koki Co., Ltd. (72) Inventor Hiroyuki Tsuzaka 1-1 Asahimachi, Kariya City, Aichi Prefecture Inside Toyota Koki Co., Ltd.

Claims (3)

[Claims] After processing a predetermined portion of a work, a dimension of the predetermined portion is measured, and when the measured value is out of a tolerance, the predetermined portion is processed so as to fall within the range of the tolerance. A method of processing a workpiece, characterized by the following. 2. A processing means for processing a work, a measuring means for measuring a dimension of a predetermined part of the processed work, and whether a measured value of the predetermined part measured by the measuring means is within a tolerance range. Determining means for determining whether or not, when the measured value is out of the tolerance, control means for causing the processing means to process a predetermined portion of the workpiece so as to fall within the range of the tolerance. Work processing equipment characterized by the above-mentioned. 3. The apparatus for processing a work according to claim 2, wherein the processing means and the measuring means are operated in accordance with the transferred program, and the progress status information of the program and the judgment information of the judgment means are outputted. A side device and a program for operating a processing unit and a measuring unit are registered, and based on the progress status information of the program from the machine side device and the determination information, transfer of a predetermined program to the machine side device. And a device for processing a workpiece.