JPH0531656A - Processing part allocating method for flexible production system - Google Patents

Abstract

PURPOSE:To provide a processing part allocating method by which compliance of the work plan of an FMS can be facilitated by accurately starting, during a manned time zone processing of parts, processing of which is scheduled at a manned time zone during creation of a production plan for the FMS. CONSTITUTION:A production plan data registering part 3 to register production plan data, and a work deciding indicating part 4 to decide parts supplied in a preparing station and indicate a work according to production plan data registered in the production plan data registering part 3, a jig in a system, and a pallet are provided. Further following parts are constituents, a processing schedule data creation part 5 to create a processing schedule data wherein the supplied parts are registered according to a processing order, a processing part allocating part 6 to research a part to be processed from the schedule data 5 to allocate in when a processing part allocation demand is issued from a processing machine, and an operation control part 7 to perform actual processing control when allocation of processing parts is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of allocating machined parts in a flexible manufacturing system (hereinafter referred to as FMS).

[0002]

2. Description of the Related Art In an FMS consisting of a numerically controlled machine tool, an automated warehouse, an unmanned transfer device, a setup station, and a computer for centrally managing them, conventionally, the setup station has been set up according to the production plan data previously input to the computer. A method has been employed in which the parts are put in and the parts put in at the setup station are registered in the computer as machining schedule data, the machined parts and the machines are assigned based on the machining schedule data, and the machining is sequentially performed. A conventional technique will be described below with reference to the drawings.

FIG. 6 is a block diagram for explaining a conventional method of allocating machined parts in an FMS. In the figure, in the conventional allocation method, first, the production plan data registration unit 3 registers the production plan data via the CRT 1 and the keyboard 2. Here, as shown in FIG. 8, the production plan data is a list of parts to be machined by the system, and is composed of a machined part name, a number of machined parts, and a priority number according to numbers. In particular, the priority number is expressed by a numerical value, and the smaller the number, the higher the priority, indicating that the parts input at the setup station and the machining in the system are prioritized over the larger number. Next, in the work decision instructing section 4, jigs and pallets are arranged in order of priority number, and the parts introduction work is decided and instructed at the setup station from the parts ready for system introduction. When parts are loaded at the setup station in accordance with the work determination instruction section 4, the processing schedule data creation section 5 creates processing schedule data. Here, the machining schedule data is the parts input at the setup station as shown in FIG.
In other words, in the list of parts waiting to be processed in the automated warehouse,
The data is rearranged in the order of the priority number every time there is an input part. Then, when there is a machining part allocation request from the machining machine, the machining part allocating unit 6 searches the machining schedule data for the allocating part, and conveys the part allocated by the operation control unit 7 to the numerically controlled machine tool for machining. To perform. The parts are processed by the FMS according to the above procedure.

Next, the operation of the machined part allocation section 6 will be described with reference to the flowchart of FIG. 7 showing the conventional machined part allocation method in the FMS. In the procedure, first, when a processing part allocation request is issued from the processing machine, the first record of the processing schedule data is read (step S1). Here, it is determined whether or not there is data to be read (step S2), and if there is no data, it is determined that there is no processed part (step S3), and the process ends. If there is data in the step S2, that is, if there is a part to be machined, the part is assigned as a machined part of the requested machine (step S4), and it is judged that the machined part exists (step S5). The process ends. When it is determined that there is a machined part, machining of the part allocated by the operation control unit 7 is started. Further, since the processing schedule data are arranged in the order of the priority numbers, the priority processing allocation in the system is realized by reading the first record in step S1.

[0005]

In the FMS, since the intervention of the operator is required for the machining, the parts machined in the manned time zone (for example, the trial cutting in which the operator must confirm the machining by the machining machine) Parts, parts for which an operator must supplement or replace tools for the automatic tool changer of a numerically controlled machine tool), and parts that you want to process in an unmanned time because you do not need an operator Put in the obi at the setup station. However, in the above-described conventional method for allocating machining parts in the FMS, the machining order in the system of the components introduced at the setup station is determined at the stage when the components are introduced into the system. When the parts that are processed are put into the system, the parts that are processed in the unmanned time zone are processed, and the parts that you want to process in the manned time zone are slipped into the unmanned time zone and are input to the processing machine. There was a problem that the system was stopped and the operating rate of the system was lowered. On the contrary, in order to prevent the stop of the processing machine and increase the operating rate of the system, it is necessary to make the operator stand by in the unmanned time zone, which results in the FMS.
There was also a problem of upsetting the work plan of.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of assigning a processed part in an FMS, and an object of the present invention is to process a part to be processed in the FMS in advance in a manned time zone and in an unmanned time zone. This is achieved by grouping the parts into groups to be processed and assigning the parts to be machined, by selecting from the ones matching the machining group notified in each time zone and instructing the machining. That is, an object of the present invention is to provide a numerically controlled machine tool, an automated warehouse, an unmanned transfer device,
In a flexible production system including a setup station and a computer that manages these in a centralized manner, means for designating a machining group indicating a time zone to be processed in production plan data, and the machining specified in the time zone to be processed For parts of a group, means for allocating parts to the numerically controlled machine tool according to the production plan data, and for parts of the machining group other than the time zone to be machined, after the parts are put into the flexible production system, The production plan is provided by causing the automatic warehouse to stand by until the designated time zone to be processed comes, and allocating parts to the numerically controlled machine tool at the designated time zone to process. The numerically controlled machine tool that selects a part based on the machining group specified in the data It is accomplished by assigning.

[0007]

According to the method of allocating a processed part in the FMS of the present invention, a part scheduled to be processed in a manned time zone is accurately started in a manned time zone, and an unmanned time zone in which a worker is required to machine a part is started. The deviation of the
It becomes easy to comply with the work plan in MS.

That is, according to the method of allocating machining parts in the FMS of the present invention, according to the production plan data registration section for registering the production plan data, the production plan data registered in the production plan data registration section and the jigs and pallets in the system. A work decision instructing unit that determines the parts to be input at the setup station and instruct work, and processing schedule data that creates processing schedule data in which the input parts, that is, the parts waiting to be processed in the automated warehouse, are registered in the processing order. By the creating unit, the machining component assigning unit that searches for a component to be machined from the machining schedule data and allocates it when a machining component allocation request comes from the processing machine, and the operation control unit that performs actual machining control when the machining component allocation is completed. Will be realized. As a result, when a production plan is created, the parts scheduled to be machined in the manned time zone can be accurately started to be machined in the manned time zone, which makes it easy to comply with the FMS work plan. Further, according to the method of the present invention, processing of a part that does not require an operator takes precedence over processing of a part that requires an operator during an unmanned time period, so that the processing machine can be stopped unnecessarily. Can be eliminated and the operating rate of the system can be improved.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram of an apparatus that realizes a processed component allocation method in an FMS of the present invention. In the figure, the method of the present invention is as follows:
The production plan data is registered via the CRT 1 and the keyboard 2. Here, as shown in FIG. 3, the production plan data for realizing the present invention is a list of parts to be machined by the system and is composed of a machined part name, a machined quantity, a priority number and a machining group. The priority number is expressed by a numerical value, and the smaller the number, the higher the priority, and the higher the number, the higher the priority of the component loading at the setup station and the processing within the system. The machining group specifies the time zone in which each part should be machined. In the figure, "1" is for parts that are to be machined during manned time, and "1" is for other parts that can be machined unattended. 2 "is set for grouping. Next, the work decision instructing section 4 arranges the jigs and pallets in order of priority number, and decides and gives an instruction for work to put the parts in the setup station from the parts that can be put into the system immediately. When parts are put in at the setup station according to the instruction of the work determination instruction section 4,
The processing schedule data creation unit 5 creates processing schedule data. Here, the processing schedule data for realizing the present invention is a list of the parts input at the setup station, that is, the parts waiting to be processed in the automatic warehouse as shown in FIG. The data is rearranged in order of priority number each time. Further, the processing group described above is added to each data. Then, when a processing part allocation request is issued from the processing machine, a processing group notification (“1” is a manned time zone notification, “2” is an unmanned time zone notification, which is notified by the keyboard 2 and the timer 8 in the processing part assignment section 6, "0" does not assign by machining group), and if other than "0" is notified, the machining group is assigned by machining group. The parts to be processed are searched for and assigned, and the parts other than the processing group notified by them are made to stand by in the automatic warehouse until the time zone at which they want to be processed. If "0" is notified, parts are allocated in the order of registration of the machining schedule data as usual, and the parts allocated by the operation controller 7 are conveyed to the numerically controlled machine tool for machining. Here, the timer 8 has a time zone as shown in FIG.
It operates according to the processing group notification data for comparing the processing group notification, and notifies the set processing group to the processed component allocating unit 6 by a signal line or the like in each time zone.

FIG. 2 is a flowchart showing an operation example of the machined part allocating section 6 of the present invention. It is shown in association with the flowchart of FIG. 7. The procedure of the method of the present invention will be described in detail with reference to FIGS.

First, when a processing part is requested by the processing machine, a record pointer for reading processing schedule data is set (step S6) (here, "1" is set). Next, of the processing schedule data, the record of the pointer designated in step S6 is read (step S7). Here, it is determined whether or not there is data to be read (step S2), and if there is data, the processing group notified by the keyboard 2 or the timer 8 (in the case of the keyboard 2, it is notified by numerical input from the key). Processing group, if it is a timer 8, the processing group notified by a signal line or the like is determined according to a preset processing group notification table (step S8), and if the notification is "0", the processed part by the processing group Is not performed, the part of the first record is allocated as a machined part of the requested machine. That is, the processing part allocation processing is performed as usual. Notification is "0"
Otherwise, the processing group of the record read in step S7 is compared with the notified processing group (step S9). If they do not match, the record pointer to be read is counted up (step S10). ,
The process returns to step S7, the processing schedule data is read again, and the above processing is repeated until a match is found or there is no processing schedule data to read. If both machining groups match in step S9, the component of the read record is assigned as the machining component of the requested machine (step S4), it is determined that the machining component is present (step S5), and the process is executed. finish.
By the processing in step S9, the parts other than the notified processing group can be made to wait until the processing time zone comes. When it is determined that there is no data in step S2, it is determined whether the read pointer at that time is "1" (step S11). If the pointer is "1", it is determined that there is no machining schedule data. It is determined that there is no processed part (step S3), and the process ends.
If the pointer is not "1", it is determined that there is machining schedule data but there is no one that matches the notified machining group, the first record of the machining schedule data is read again (step S1), and the part is processed. And the presence of processed parts is determined (step S
5) is performed and the processing is terminated. If no matching process group is found by the determination in step S11, for example, even if the scheduled machined parts for manned hours are exhausted in the manned time zone, the machined parts for the unmanned time zone are allocated. Will be performed and the processing machine will not be stopped.

Here, when the processing of the processed part can be made to stand by by the processing of step S9, when the processing of the part scheduled for each time zone is not completed within the time zone,
Parts that have not been processed are kept waiting until the next processing time comes. For example, if the parts scheduled for the manned time zone are not completed in the manned time zone, the remaining parts are kept waiting until the next manned time zone. in this case,
Since the processing group notification is given from the external device such as the keyboard 2 and the timer 8, if you want to keep the production plan and processing schedule planned for each time period, you can send "0" as the processing group notification. The determination of step S8 assigns the processed parts according to the conventional production plan and processing schedule.

In the example of FIG. 4, when the processing group is notified as "1", that is, the manned time zone, the first component name "BPART" is assigned according to the conventional method, but the method of the present invention is used. According to the processing group is "1",
The component name "APART" registered in the highest order is assigned.

[0014]

As described above, according to the method of allocating a machined part in the FMS of the present invention, the machine tool stops unless the machined part is processed during the manned time among the various kinds of parts to be machined by the FMS. Accurate manned hours for parts that may cause problems, such as prototype parts that require the operator to confirm the processing on the processing machine or parts that require the operator to supplement and replace the tool with the automatic tool changer. Since it is possible to start processing in the FMS, workers do not have to wait in the system for an unmanned time, and FMS
Compliance with your work plan can be facilitated. Also, in the unmanned time zone, unless all the machining parts scheduled for the unmanned time zone are input to the processing machine, the parts to be processed in the manned time zone will not be input, so there is no need to stop the processing machine unnecessarily. Therefore, it becomes possible to improve the operating rate of the system.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus that realizes a method for allocating a processed component in an FMS according to the present invention.

FIG. 2 is a flowchart showing a method of allocating a processed component in the FMS of the present invention.

FIG. 3 is a diagram showing production planning data for realizing the present invention.

FIG. 4 is a diagram showing schedule data for realizing the present invention.

FIG. 5 is a diagram for explaining setting of a timer (processing group notification table) used in the present invention.

FIG. 6 is a block diagram of an apparatus that implements a conventional method of assigning a processed part.

FIG. 7 is a flowchart showing a conventional method of assigning a processed part in an FMS.

FIG. 8 is a diagram showing conventional production planning data.

FIG. 9 is a diagram showing conventional processing schedule data.

[Explanation of symbols]

 1 CRT 2 keyboard 3 production plan data registering part 4 work decision instructing part 5 machining schedule data creating part 6 machining part allocating part 7 operation control part 8 timer

Claims (1)

What is claimed is: 1. A flexible production system including a numerically controlled machine tool, an automated warehouse, an unmanned transfer device, a setup station, and a computer for centrally managing them. Means for designating a machining group indicating a band, means for allocating a component to the numerically controlled machine tool in accordance with the production plan data for parts of the machining group specified in the time zone to be machined, and For parts in the processing group other than the time zone, after the parts are put into the flexible production system, the parts are placed in the automatic warehouse until the designated time zone to be processed comes, and the designated time to be processed. Means for allocating parts to the numerically controlled machine tool at the time of becoming a belt, Workpiece allocation method in a flexible manufacturing system, characterized in that by selecting the components on the basis of the working group specified in data was allocated to the numerically controlled machine tool.