JPH11202923A - Production system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the burden of a worker or programmer by changing the number of pieces of pallet working information to be worked into the working number changed by a working number changing means at the time of conveying the pallet to a numerically controlled machine tool. SOLUTION: Corresponding to the instruction of a central processing unit 8, a work conveyer 1 conveys a pallet, to which a lot of works are attached, to a plan station 7. At such a time, when a number is changed at the plan station 7, the number changed pallet working information is read and first working information data are read. Then, the working number of the first working information is checked and when the number of '0', that working is skipped. When the number is not '0', the registration into the common parameter of a numerical controller(NC) 6 is instructed to the NC 6. Thus, it is not necessary for the worker to perform confirmation by stopping a machine and the burden of the worker can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production system for processing a work by transporting a pallet on which a plurality of works (workpieces) are mounted to a machine tool controlled by a numerical control NC device. The name of the machining program for machining each of the workpieces attached, the number of machining, and the treatment when NG occurs are registered in advance.
The present invention relates to a production system that performs production according to the registration information.

[0002]

2. Description of the Related Art In the prior art, when a large number of different kinds of works are mounted on the same pallet and machined, machining programs for different kinds of works are added to each other to perform machining as one machining program. Was.

In this case, each time the combination of works to be mounted on the same pallet is changed, it is necessary to re-add a machining program and create a new machining program each time. When the number of pieces to be machined is changed, the machining program is also changed. There is a need to. Further, when NG occurs during the machining, the machining in the next process of the same work is skipped, but machining of another work is performed, and it is necessary to perform programming in various cases.

[0004]

In the prior art, machining programs for different types of workpieces are added to each other to perform machining as one machining program. N for each change of
It was necessary to create a C program, which significantly reduced the operating rate. In addition, the processing when an NG work occurs is required to be programmed in various cases, so that the program becomes complicated. In order to change the processing contents, it is particularly necessary to edit a complicated NC program. There was a heavy burden on programmers.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a production system which can reduce the burden on an operator or a programmer when the number of workpieces is changed or an NG work occurs. To provide.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a production system for processing a work by transporting a pallet on which a number of works are mounted to a machine tool controlled by a numerical controller, and processing the work. A pallet machining information registering means for registering pallet machining information for designating a machining program name and the number of machining for machining each of a plurality of workpieces mounted on the pallet for each pallet in the order of machining; A program name selecting / starting means for instructing the selection of the machining program name and the NC start in accordance with the machining information; and when the machining number to be attached to the pallet is changed with respect to the machining number specified by the pallet machining information, When the pallet is conveyed to the numerically controlled machine tool, Is achieved by providing a variable changing means for changing the processing number of the processing number has been changed by the processing number changing means of said pallet processing information.

Further, the object of the present invention is to provide a pallet for designating a processing program name for processing a plurality of works mounted on the pallet and an action to be taken when NG occurs in the processing for each of the pallets in the order of processing. Pallet processing information registration means for registering processing information, selecting and NC of the processing program name according to the pallet processing information
A program name selecting / starting means for instructing start, and NG indicated by the pallet processing information if the processing is NG
If the processing is OK, the processing is completed by providing processing completion determining means for performing the next processing specified by the pallet processing information.

[0008]

FIG. 1 is a block diagram showing an example of a production system according to the present invention. FIGS. 2 and 3 are tables and display examples for explaining the operation of the present invention. FIG. 5 is a flowchart illustrating an operation example of the present invention. As shown in FIG. 1, the production system of the present description includes a work transfer device 1, an APC (auto pallet changer) 2, a warehouse 3, a tool stocker 4, a numerically controlled NC machine tool 5, a numerical control device 6, a setup station 7, The work transfer device 1 is configured by a central processing unit 8, and the work transfer device 1 transfers a pallet on which a number of works are mounted to the setup station 7 according to an instruction from the central processing unit 8. Then, when the worker attaches the work to the pallet at the setup station 7 and notifies the central processing unit 8 that the attachment is completed,
The pallet is transferred to the APC 2 by the work transfer device 1, and the work is processed by the numerically controlled machine tool 5. The pallets processed by the numerically controlled machine tool 5 are transported from the APC 2 to the warehouse 3 and wait for being collected at the setup station 7.

In the central processing unit 8, pallet processing information A, B, C,... As shown in the table of FIG. Are registered in advance in the pallet processing information registration means with unique names for the combinations of different kinds of workpieces to be mounted on the same pallet. This pallet processing information is registered in the order in which the attached workpieces are processed, and is separately registered if the process is divided. In the example shown in FIG. 2, four types of workpieces are registered with pallet processing information named "A", and the first type includes two processes, the second type includes three processes, and the third and fourth types include one process. Have been.
The number of processing is 2 for the first type, 3 for the second type, 3 and 4
The type is one, and the driving method is N for the first and second types.
The third and fourth types are buffer operations for performing machining while sequentially transferring the NC program to the numerical control device 6 by transferring the C program to the numerical control device 6 at a time. The action at the time of NG is to register the next processing to jump to when the NG occurs during the processing. Unless specified, the next processing is performed and all the remaining processing is canceled. Registers as "End". The processing of Nos. 1 and 3 is the first step, and if NG occurs, it is necessary to skip the second and subsequent steps. Therefore, the numbers "3" and "6" of the next type of processing are designated, respectively.

By instructing the name of the pallet processing information of the pallet to be processed by the central processing unit 8, the pallet is transferred to the setup station 7 by the work transfer device 1, and the operator mounts the work on the pallet. . Here, if the number of workpieces to be mounted on the pallet has changed for some reason, call the pallet processing information number change screen as shown in FIG. 3, move the cursor to the place to be changed, and directly enter the number from the keyboard. input. The number changed by the processing number changing means is set for the pallet being mounted, and does not rewrite the contents of the pallet processing information. Such a change in the number of pieces of pallet processing information can be performed using the central processing unit 8 if the central processing unit 8 is located near the setup station 7, or using the terminal device of the central processing unit 8 otherwise.

When the material pallet input from the setup station 7 is transferred to the numerically controlled machine tool 5 by the work transfer device 1, the central processing unit 8 performs processing of the work mounted on the pallet. Control is started. The details will be described with reference to the flowchart of FIG. First, pallet processing information of a pallet to be processed is read. At this time, if the number is changed in the setup station 7, the pallet processing information whose number has been changed is read, and the first processing information data is read (step S1). The processing number of the first processing information is checked, and if the number is “0”, the processing is skipped (step S
2). When the number is not "0", the numerical controller 6 is instructed to register it as a common variable of the numerical controller 6 (step S3). Since this common variable is referred to by the NC program, the number of the common variable of the numerical controller 6 to be registered is determined in advance. When the registration of the common variables is completed, the operation method is extracted from the processing information data, and it is determined whether the operation is the memory operation or the buffer operation (step S4). In the case of the memory operation, the numerical controller 6
A program selection command for invoking and operating the NC program registered in the CPU is issued to the numerical controller 6 (step S5). In the case of buffer operation, the NC program registered in the central processing unit 8 is executed. The program is sequentially transferred to the numerical controller 6, and a program selection command for operating the numerical controller 6 while receiving the data is issued to the numerical controller 6 (step S6). When the program selection is completed, an NC start command is issued to the numerical controller 6 (step S7). For memory operation,
Processing is performed by a program read into the memory of the numerical control device 6, and in the case of buffer operation, processing is performed while interpreting data sent from the numerical control device 8.

In the memory operation, since the number of machining is registered in the common variable of the numerical controller 6, this common variable is read by the NC program, and an NC program is created in advance so that the machining is repeated by the number of machining. Keep it. In the case of the buffer operation, since the NC program sent from the central processing unit 8 does not remain in the memory of the numerical controller 6, the central processing unit 8 transfers the NC program for the number of machining. When the machining for the number of machining is completed in this way (step S8), the machining completion determining means in the central processing unit 8 determines whether the result of the machining notified from the numerical controller 6 is OK or NG. (Step S9). O
If K is completed, the next processing information data is read (step S10). If NG is completed, the content of the processing of the processing information data at the time of NG is fetched. If the content is "0", the next processing information data is read. Otherwise, the processing information data of the designated number is read (step S11). If there is no next processing information data, or if the processing at the time of NG is completed, it is determined that all processing of one pallet has been completed,
If not, the flow returns to step S2 to check the number of processed pieces of the next processing information data (step S1).
2).

[0013]

According to the production system of the present invention, when the number of processed parts is changed, it can be easily changed to the number of actually mounted processed parts. The action to be taken is determined in advance, and it is not necessary for the operator to stop the machine to confirm the operation, thereby reducing the burden on the operator and providing a production system with high processing efficiency.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a production system according to the present invention.

FIG. 2 is a table showing an example of pallet processing information of the present invention.

FIG. 3 is a screen diagram showing a terminal display example of the setup station according to the present invention.

FIG. 4 is a flowchart showing an operation example of the present invention.

[Explanation of symbols]

 Reference Signs List 1 work transfer device 2 APC (auto pallet changer) 3 warehouse 4 tool magazine 5 numerical control machine tool 6 numerical control device 7 setup station 8 central processing unit

Claims (3)

[Claims] 1. A production system for processing a work by transporting a pallet on which a plurality of works are mounted to a machine tool controlled by a numerical controller, and for processing the works mounted on the pallet, respectively. Pallet processing information registration means for registering pallet processing information for each pallet in the order in which processing is performed, and instructing the selection of the processing program name and the start of NC according to the pallet processing information A program name selecting / starting means, a processing number changing means for changing the processing number when the processing number to be attached to the pallet is changed with respect to the processing number specified by the pallet processing information, When transferred to the numerically controlled machine tool, the number of pallet processing information Production system characterized by comprising a variable changing means for changing the altered processed number by the number changing means. 2. In a production system in which a pallet on which a number of works are mounted is transported to a machine tool controlled by a numerical controller and the work is processed, the plurality of works mounted on the pallet are processed. A pallet processing information registering means for registering pallet processing information for each pallet in the order in which the processing is performed,
A program name selecting / starting means for instructing the selection of the processing program name and the NC start-up according to the pallet processing information, and, if the NG processing is completed, performs a process when an NG specified by the pallet processing information is generated; A production system comprising: a processing completion determining means for performing the next processing specified by the pallet processing information if the processing is completed. 3. The production system according to claim 1, wherein the production system includes a machine tool controlled by the numerical control device, a pallet on which the work is mounted, and a central processing unit that integrally controls the machine tool and the pallet. A production system, which is a flexible manufacturing system, wherein the central processing unit has the respective units.