JPH0538664A - Machined parts producing method - Google Patents

Abstract

PURPOSE:To continue production of machined components only with a whole machine tool or machine tools in case some of a plurality of machine tools provided go troubled, by altering the program to specify robot motions into a program specifically dedicated to failure case. CONSTITUTION:A CPU 16 judges from a signal given by a machine tool trouble sensor 24 whether any of a plurality of, for example three, machine tools 91-93 goes troubled, and if no, a program specifically devoted to normal times is loaded in a memory provided on a robot 10, and the three machine tools 91-93 apply the same processing to works in the identical shape. If yes, on the other hand, the troubled machine toll or tools are identified, and another program specifically dedicated to failure case is loaded in the same memory, when production of machined components shall be continued only with a whole machine tool or tools. Thus the production can proceed in a troubled case to a certain degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machined part capable of continuing production even when some machine tools break down, when a work is machined by a plurality of machine tools to produce machined parts. It relates to the production method.

[0002]

2. Description of the Related Art FIG. 7 shows, for example, Japanese Patent Laid-Open No. 64-71677.
FIG. 6 is an arrangement plan view for explaining a conventional method for producing a machined part shown in Japanese Patent Publication No. A work (not shown) is sequentially processed by the machine tool 1. NO for each machine tool 1. 1 to NO. Numbers up to 8 are attached. Services such as loading and unloading of works for each machine tool 1 are performed by the robots 2 and 3. Further, the robots 2 and 3 are traveling type robots that travel on the rails 4, perform work within the service ranges 5 and 6, and retreat to the retreat points 7 and 8, respectively.

Next, the conventional method for producing machined parts shown in FIG. 7 will be described. The two robots 2 and 3
Normally, while traveling on the rails 4, the predetermined machine tools 1 are assigned to each other to provide services such as loading and unloading of works. However,
When one of the robots, for example, the robot 3 fails, the robot 3 is evacuated to the evacuation location 8 as shown in the layout plan view of FIG. 8, and the other robot, that is, the robot 2 is serviced for all the machine tools 1. Let

[0004]

Since the conventional method for producing machined parts has the above-described structure, the robot 2
Or, if 3 fails, the production of machined parts can be continued, but if even one of the machine tools 1 fails, the process performed by the failed machine tool will not be performed, and the production of machined parts will not occur at all. There was a problem that it could not be done.

The present invention has been made to solve the above problems, and provides a method for producing a machined part capable of continuing production of a machined part even if some machine tools fail. The purpose is to

[0006]

According to a first aspect of the present invention, there is provided a method for producing a machined part, in which, when some of a plurality of machine tools fail, a program for defining the operation of a robot fails. The program will be changed to a compatible program and the production of machined parts will continue with only machine tools that have not failed.

Further, in the method of manufacturing a machined part according to a second aspect of the present invention, when some of the plurality of machine tools fail, the program that regulates the operation of the robot is changed to a failure response program. However, the external machine tools other than the plurality of machine tools perform the process performed by the broken machine tool to continue the production of machined parts.

[0008]

In the invention according to claim 1 of the present invention, the program that defines the operation of the robot is changed to a failure-time correspondence program, and the production of machined parts is continued only by machine tools that have not failed.

According to a second aspect of the present invention, the program defining the operation of the robot is changed to a program for dealing with a failure, and the process performed by the failed machine tool is performed by an external machine other than a plurality of machine tools. Let the machine do the work and continue producing the machined parts.

[0010]

EXAMPLES Example 1. 1 is a layout plan view for explaining a first embodiment of the invention according to claim 1 of the present invention. Machine tool 9 ₁
To 9 ₃ performs the same processing for the same shape of the workpiece, served by loading and unloading, etc. of the workpiece from the robot 10. The robot 10 also services the conveyor 11 for carrying in unprocessed workpieces and the conveyor 12 for carrying out processed workpieces, and is provided with a service range 13 necessary for these services. One end of the conveyors 11 and 12 has a service range 13
It is installed to be included in. Also, the robot 1
0 is provided with a memory for storing a program or the like that defines the operation of the robot 10. The control device 14 controls the machine tools 9 _{1 to} 9 ₃ , the robot 10, and the conveyors 11 and 12 in accordance with a workpiece machining instruction 15 given from the outside, and performs machining according to the machining instruction 15.

FIG. 5 is a block diagram showing an internal configuration of the control device 14. The CPU 16 controls the entire device including the machine tools 9 _{1 to} 9 ₃ and the robot 10.
A ROM 17 for storing programs and the like and a RAM 18 for storing data and the like are connected to 16. CPU1
6 is a machine tool control device 19 and a machine tool drive device 20.
The machine tools 9 _{1 to} 9 ₃ are controlled via the, the conveyors 11 and 12 are controlled via the conveyor control device 21 and the conveyor drive device 22, and the robot 10 is controlled via the robot control device 23. The failure of the machine tools 9 _{1 to} 9 ₃ is detected by the machine tool failure detector 24, and the CP is detected.
It is transmitted to U16 and displayed on the machine tool failure display device 25. The input / output signal of the CPU 16 is the processing instruction 15
Input / output through the I / O port 26.

Next, the first embodiment of the present invention shown in FIG. 1 will be described with reference to the flowchart of FIG. The CPU 16 first determines whether or not there are any machine tools 9 _{1 to} 9 ₃ that have failed based on the signal from the machine tool failure detector 24 (step S1), and if the result is "NO", the robot 10 The normal time program is loaded into the memory provided in the memory (step S2). Then 3
The machine tool 91 _to 93 ₃ of the pedestal may perform the same processing for the same shape of the workpiece (step S4). The above operation is performed until the production of all machined parts is completed (step S5).

[0013] It should be noted that the normal time for the program, all of the machine tool 9 ₁ to 9 ₃ is based on the assumption that you have not failed, and the machine tool 9 ₁ to 9 ₃ fails even one, the control of the entire device Can not do.

On the other hand, if "YES" is determined in step S1, the faulty machine tool is identified, and the fault response program is loaded into the memory provided in the robot 10 (step S3). Subsequently, the production of machined parts is continued only by machine tools that have not failed (steps S4 and S5).

Conventionally, if even _one machine tool 9 _{1 to} 9 ₃ fails, all production is stopped, but in the first embodiment,
Even if one or two machine tools fail, production can be continued (production amount becomes 2/3 or 1/3).

Example 2. 2 is a layout plan view for explaining a second embodiment of the invention according to claim 1 of the present invention,
Unlike the first embodiment, the machine tools 9 _{1 to} 9 ₃ process workpieces having different shapes. Machine tool 9 ₁ to 9
_3, by processing the raw workpiece to be carried from the respective conveyor 11 ₁ to 11 _3, machined workpiece is unloaded by the conveyor 12 ₁ to 12 _3, respectively. In addition, the control device 1
The internal structure of No. 4 is the same as that of the first embodiment and is as shown in FIG.

In the second embodiment, each machine tool 9 is processed in step S4.
Except for machining for _{1-9 3} different shape of the work is the same as the first embodiment (see the flowchart of FIG. 6).

In the past, if even one machine tool failed, all production stopped. However, in the second embodiment, even if one or two machine tools 9 _{1 to} 9 ₃ fail, a failure occurs. The production of machined parts by machine tools that are not available can continue.

Example 3. FIG. 3 is an arrangement plan view for explaining a third embodiment of the invention according to claim 2 of the present invention.
The seven machine tools 9 _{1 to} 9 ₇ are arranged so as to perform processing on one work in this order, and receive services such as work loading and unloading from one robot 10. The robot 10 is a traveling robot that travels on the rail 27. The unprocessed work is carried in by the conveyor 11 and loaded into the machine tool 9 ₁ , and the work machined by the machine tool 9 ₇ is carried out by the conveyor 12. The intermediate processed work is carried out to an external machine tool (not shown) other than the machine tools 9 _{1 to} 9 ₇ by the conveyor 28, and the work processed by the external machine tool is carried in by the conveyor 29 to an appropriate machine tool. It is thrown in. The internal configuration of the control device 14 is the same as that of the first and second embodiments, and is as shown in FIG.

Next, a third embodiment of the present invention shown in FIG. 3 will be described with reference to the flowchart of FIG. The CPU 16 first determines whether or not there are any failed machine tools 9 _{1 to} 9 ₇ based on the signal from the machine tool failure detector 24 (step S1), and if the result is “NO”, the robot 10 The normal time program is loaded into the memory provided in the memory (step S2). Subsequently, the raw workpiece is conveyed by the conveyor 11, seven of the machine tool 91 _to 93 ₇ performs processing in this order, processed workpiece is unloaded by a conveyor 12 (step S4). The above operation is performed until the production of all machined parts is completed (step S5).

Meanwhile, if it is determined "YES" in step S1, the failed machine is identified (e.g., the machine tool 9 _3), the failure-time corresponding program in a memory provided in the robot 10 It is loaded (step S3). Subsequently, to the point where the workpiece is subjected to machining by the machine tool 9 _2, the operation similar to the operation by the normal-time program is performed. The robot 10 places this work on the conveyor 28, and the conveyor 28 carries this work to an external machine tool that performs the same machining as the machine tool 9 ₃ . Workpiece undergoing machining by external machine tool, is carried by the conveyor 29, it is introduced into the machine tool 9 ₄ by the robot 10. The operation thereafter is the same as the operation by the normal time program.

Conventionally, if one of the machine tools 9 _{1 to} 9 ₇ fails, all production is stopped, but in the third embodiment,
Production can be continued even if one or more machine tools fail.

Example 4. FIG. 4 is an arrangement plan view for explaining an embodiment 4 of the invention according to claim 3 of the present invention.
The four machine tools 9 _{1 to} 9 ₄ are arranged to perform processing on one work in this order, and receive services such as loading and unloading of the work from the robots 10 ₁ to 10 ₄ , respectively. Each robot 10 ₁
10 coverage _131-134 of ₄ overlap each other as shown.

[0024] Conveyor 28 _{1-28 3} is equivalent to a conveyor 28 of Example 3, the conveyor 29 _{1-29 3} corresponds to the conveyor 29 of the third embodiment. Conveyors 28 ₁ and 29 ₁ have service ranges 13 ₁ and 1 at one end.
3 ₂ is installed so as to be in the overlapping region, and the same applies to the conveyors 28 ₂ , 29 ₂ , 28 ₃ and 29 ₃ . The temporary work table 30 ₁ has a service range of 13 ₁ and 13
₂ are installed in the overlapping region, and are used by the robot 10 ₁ to transfer the intermediate processed workpiece to the robot 10 ₂ . The same applies to the work temporary rests 30 ₂ and 30 ₃ . Further, the internal configuration of the control device 14 is the same as in the first, second and third embodiments,
It is as shown in FIG.

Next, a fourth embodiment of the present invention shown in FIG. 4 will be described with reference to the flowchart of FIG. The CPU 16 first determines whether or not there are any failed machine tools 9 _{1 to} 9 ₄ based on the signal from the machine tool failure detector 24 (step S1), and if the answer is NO, the robot 10 _A normal time program is loaded into the memories provided in ₁ to 10 ₄ (step S2). Then, the robot 10 ₁ follows the normal time program,
The unprocessed work carried in from the conveyor 11 is machine tool 9
₁ is put and the work processed by the machine tool 9 ₁ is placed on the work temporary stand 30 ₁ . This work is a robot 1
0 ₂ throws it into the machine tool 9 ₂ . The work processed by the machine tools 9 ₃ and 9 ₄ through the same process is placed on one end of the conveyor 12 by the robot 10 ₄ and carried out by the conveyor 12 (step S
4). The above operation is performed until all machined parts are produced (step S5).

On the other hand, if "YES" is determined in step S1, the faulty machine tool is specified (for example, machine tool 9 ₃ ), and the memories provided in the robots 10 ₁ to 10 ₄ fail. The hour corresponding program is loaded (step S3). Next, the work is the temporary table 3.
Until it is placed on the 0 _2, the operation similar to the operation by the normal-time program is performed. This work is transferred onto the conveyor 28 ₂ by the robot 10 ₃ and carried out to the external machine tool by the conveyor 28 ₂ . The external machine tool performs the same machining as the machine tool 10 _3, and the work after the machining is carried in by the conveyor 29 ₃ and the robot 1
0 ₄ by being put into the machine tool 9 _4. The operation thereafter is the same as the operation by the normal time program.

Conventionally, if one of the machine tools 9 _{1 to} 9 ₄ fails, all production is stopped, but in the fourth embodiment,
Production can be continued even if one or more machine tools fail.

Example 5. In the first to fourth embodiments, the machine tool failure detector 24 (see FIG. 5) automatically detects that the machine tool has failed, and the program loaded into the memory provided in the robot 10i is CP.
If the program is automatically changed to the failure countermeasure program by U16, the embodiment of the invention according to claim 4 of the present invention is achieved.

[0029]

As described above, according to the first, second, and third aspects of the present invention, the operation of the robot is defined when some of a plurality of machine tools fail. Machining a workpiece by changing the program to a failure-response program and using only the machine tool that has not failed, or by causing the external machine tool other than multiple machine tools to perform the process performed by the failed machine tool Therefore, there is an effect that a machined part production method capable of continuing production of machined parts even when some machine tools fail is obtained.

Further, according to the invention of claim 4 of the present invention, it is automatically detected that some of the plurality of machine tools are out of order, and the robot that provides service to the plurality of machine tools. Since the program that regulates the operation of the machine is automatically changed to the failure response program, the machined parts production that can continue the production of machined parts without trouble if some machine tools fail There is an effect that the method can be obtained.

[Brief description of drawings]

FIG. 1 is a layout plan view for explaining a first embodiment of the present invention.

FIG. 2 is an arrangement plan view for explaining a second embodiment of the present invention.

FIG. 3 is an arrangement plan view for explaining a third embodiment of the present invention.

FIG. 4 is a layout plan view for explaining a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing an internal configuration of a control device.

FIG. 6 is a flowchart showing an embodiment of the present invention.

FIG. 7 is a layout plan view for explaining a conventional method for producing a machined part.

FIG. 8 is an arrangement plan view for explaining a robot failure in the conventional method of producing a machined part.

[Explanation of symbols]

9 _{1 to} 9 ₇ Machine tool 10 10 ₁ to 10 ₄ Robot 14 Control device

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[Procedure amendment]

[Submission date] December 6, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Change

[Correction content]

Claims (4)

[Claims] 1. A method for producing a machined part, which is performed by using a plurality of machine tools and a smaller number of robots than the plurality of machine tools for servicing the plurality of machine tools. In the case where some of the machine tools described above are out of order, the program that regulates the operation of the robot is changed to a failure response program, and the production of machined parts is continued only by the machine tools that are not out of order. Method for producing machined parts. 2. A method for producing a machined component, which is performed by using a plurality of machine tools that sequentially machine one workpiece and a robot that services the plurality of machine tools, wherein the plurality of machine tools are used. When some of them fail, the program that regulates the operation of the robot is changed to a failure response program, and the process performed by the failed machine tool is changed to an external machine tool other than the plurality of machine tools. A method for producing a machined part, characterized by continuing production of a machined part. 3. The robot that was servicing the failed machine tool is retracted to a position that does not hinder the operation of other robots, and the pre-process of the process performed by the failed machine tool is performed. The robot that provides the service to the machine tool to perform passes the work to the external machine tool, and the robot that provides the service to the machine tool that performs the post-process of the faulty machine tool is the external machine tool. 3. The work is received from
Manufacturing method of machined parts. 4. A failure of some of the plurality of machine tools is automatically detected, and a program that defines the operation of a robot that services the plurality of machine tools automatically fails. The method for producing a machined part according to claim 1, 2 or 3, wherein the program is changed to a time corresponding program.