JPH0796449A - Process control device - Google Patents

Abstract

PURPOSE:To sequentially carry out processing in accordance with the progress of a part even when a central processing device is broken down. CONSTITUTION:A preparation part 20 prepares a production plan in each FMS in accordance with a manufacturing plan of a part. A down load part 21 transfers working process information registering information necessary for the production plan and working of the part to each FMS control device. An informing part 25 informs the OK completed number and the NG completed number to the FMS control device to work a following process in accordance with the working process information and informs process completed information consisting of preparation completion of the part. A preparation part 22 prepares a working schedule of the part completed up to a preceding process in accordance with the production plan, the working process information and the process completed information. A control part 23 controls mechanical working in accordance with the working schedule. A judging part 24, everytime the mechanical working is completed, judges whether working is carried out by the same FMS or by another FMS in the following process, and in the case to carry out working by another FMS, transfers the process completed information to a relative FMS control device.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a plurality of FMSs (Flexible Manufacturing Systems), FMSs.
The present invention relates to a process control device in a production system including a work transfer device that connects a work transfer device and a transfer computer that manages an automated warehouse, and a central processing unit that integrally controls these.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing an example of a production system including a plurality of FMSs. This production system consists of a central processing unit 1, a transport computer 2, material input /
It comprises a setup station 3 for collecting finished products, a work transfer device 4, an automatic warehouse 5 and three FMSs. In addition, each FMS has a work transfer station 6 between the automated warehouse 5 and each FMS, an FMS control device 7, a material loading / inside FMS /
It comprises a setup station 8 for collecting finished products, a work transfer device 9 in the FMS, an automatic warehouse 10 in the FMS, and a numerically controlled machine tool 11. In the central processing unit 1, a production plan for processing by each FMS is created from the production plan of parts,
At the same time, the material input request is issued to the transport computer 2. When the operator inputs the instructed material to the material input / finished product recovery setup station 3, the work transfer device 4 transfers the input material to the automatic warehouse 5 according to an instruction from the transfer computer 2. On the other hand, each FMS control device 7
The processing of the material is controlled according to the production plan instructed by the central processing unit 1. First, the FMS control device 7 issues a material delivery request to the transport computer 2 according to the production plan. The transfer computer 2 transfers the corresponding material from the automatic warehouse 5 to the work transfer station 6 using the work transfer device 4. When the material arrives at the work transfer station 6, the FMS control device 7 uses the in-FMS work transfer device 9 to transfer the material to the FMS internal material input / finished product recovery setup station 8. The operator is F
The material conveyed to the material loading / finished product collection setup station 8 in the MS is taken out and attached to a pallet for machining. The FMS control device 7 uses the in-FMS work transfer device 9 to transfer a machining pallet to the numerically controlled machine tool 11 to control the processing of the material. At this time, if the numerically controlled machine tool 11 is already being machined, the machining pallet is once transported to the FMS automatic warehouse 10 and waits until the machining of the numerically controlled machine tool 11 is completed. When the machining with the numerically controlled machine tool 11 is completed, the FMS controller 7
Uses the in-FMS work transfer device 9 to transfer the finished product from the numerically controlled machine tool 11 to the in-FMS automated warehouse 10. If the collection work can be performed at the material loading / finished product collection setup station 8 in the FMS, the finished product is transported from the FMS automatic warehouse 10 to the FMS material loading / finished product collection setup station 8 And give instructions to collect the finished product. When the worker removes the finished product from the pallet for machining and places it on the pallet for storage, the FMS control device 7 uses the in-FMS work transfer device 9 to transfer the completed product to the work transfer station 6 and at the same time. The computer 2 is requested to store the finished product. When the finished product is transferred to the work transfer station 6, the transfer computer 2 uses the work transfer device 4 to transfer the completed product to the automatic warehouse 5. The finished product carried to the automatic warehouse 5 is carried to the material loading / finished product collecting setup station 3 by the work carrying device 4 according to the operator's instruction.
The finished product is unloaded from the pallet.

FIG. 9 is a block diagram showing an example of a conventional process control device in such a production system.
Reference numeral 0 is a flowchart showing an example of the operation. Of this process management device, the production plan creation unit 20, the schedule creation unit 22, and the schedule download unit 26 are incorporated in the central processing unit 1, and the machining control unit 23 is incorporated in the FMS control unit 7. The central processing unit 1 reads the manufacturing plan of the parts in the production plan creating unit 20 (step S01), decomposes the read parts manufacturing plan into the processes to be processed by each FMS, and creates the production plan for each FMS (step S01). S02). When a production plan for each FMS is created, each FM created in the schedule creation unit 22
One data is extracted from the production plan for each S (step S
03), the parts and processes of the taken out production plan are examined, and it is judged whether or not the corresponding material exists in the automatic warehouse 5 (step S0
4) If there is a corresponding material, it is judged that the parts and processes of the extracted production plan can be processed, and a schedule for the corresponding parts is created (step S05). If there is no corresponding material, it is determined that machining is not possible, and the corresponding production plan is put on standby for work (step S06). This process is performed for all production plans (step S07), and further for all production plans created for each FMS (step S0).
8). When the creation of the schedule for each FMS is completed, the schedule download unit 26 transfers the created schedule to each FMS control device 7 (step S
09). Upon receiving the schedule, each FMS control device 7 causes the machining control unit 23 to unload the parts and process materials designated by the schedule from the automatic warehouse 5, and controls the machining with the numerically controlled machine tool 11 (step S1).
0). When the machining completion is notified from the numerically controlled machine tool 11 to the FMS controller 7 (step S11), the FM
The S control device 7 reads the next schedule, causes the work of the designated part and process to be unloaded from the automatic warehouse 5, and controls the machining by the numerically controlled machine tool 11. This process is repeated until all schedules are completed (step S1
2). When machining with the numerically controlled machine tool 11 is completed, F
The MS control device 7 notifies the central processing unit 1 that the processing of the relevant part and process has been completed. Central processing unit 1
Performs the processing from step S03, and determines whether the production plan waiting for the previous work can be processed, that is, whether the machining of the previous process is completed and the machining of the subsequent process is possible (step S04), and the machining is possible. When such a material is generated, the schedule is transferred to the corresponding FMS control device 7. F
The MS control device 7 adds the received schedule to the end of the currently held schedule, and controls the machining with the numerically controlled machine tool 11 sequentially.

[0004]

Since the process management apparatus in the conventional production system performs all schedule creation and download in the central processing unit, for example, when the central processing unit goes down, each FMS control unit is currently When the received schedule is completed, there is a problem that even if the material to be processed is actually in the automatic warehouse, it cannot be determined and further processing cannot be performed. The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a process control device in a production system capable of performing sequential processing according to the progress of parts even if the central processing device goes down. is there.

[0005]

SUMMARY OF THE INVENTION The present invention provides a plurality of FMSs.
The present invention relates to a process management device in a production system including an FMS control device that performs group management control of the FMS and a central processing unit that collectively controls the FMS control device. Production plan creation means for creating a production plan, and a production plan for transferring the created production plan and machining process information in which information necessary for machining the parts is registered to each of the FMS control devices.
Machining process information download means is provided in the central processing unit, and the FMS control unit that processes the next process is notified of the OK completion number and the NG completion number based on the transferred machining process information, and the preparation of the parts is completed. Process completion information notifying means for notifying process completion information, and schedule creating means for creating a machining schedule of the parts completed up to the previous process based on the transferred production plan and machining process information and the notified process completion information. In the case of machining with another machining management control means for controlling machining according to the created schedule and each time the machining is completed, it is determined whether the next process is performed with the same FMS or another FMS, Is to equip the FMS control device with a next process determination means for transferring the process completion information to the corresponding FMS control device. It is achieved me.

[0006]

According to the present invention, the process completion information of each part registered in the production plan of each FMS control device is directly performed between the FMS control devices, and each FMS control device corresponds based on the process completion information. Even if the central processing unit goes down, process completion information is notified between each FMS control unit to determine whether the production plan can be processed. Therefore, the parts for which the previous process has been completed can be processed sequentially. You can build a flexible production system.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an example of a process control apparatus according to the present invention, and FIGS. 2 and 3 are flow charts showing an operation example thereof. Of this process management device, the production plan creation unit 20 and the production plan / machining process information download unit 21 are incorporated in the central processing unit 1, and the schedule creation unit 22, the machining control unit 23, and the next process determination unit 24.
The process completion information notifying unit 25 is incorporated in the FMS controller 7. The central processing unit 1 reads the parts manufacturing plan in the production plan creating unit 20 (step S21),
The read parts manufacturing plan is decomposed into processes to be processed by each FMS to create a production plan for each FMS (step S2).
2). A process of disassembling the component manufacturing plan into the production plan for each FMS will be described with reference to FIGS. In the parts manufacturing plan shown in FIG. 4, there are 8 steps in all, and FMS1 to FMS
It can be seen that in step 4, each is processed in two steps. Here, the system process is a unique process number set so as to be commonly used in the entire production system. The production plan for each FMS shown in FIG. 5 is created while adjusting the delivery date from this parts manufacturing plan.

When a production plan for each FMS is created, the production plan / machining process information download section 21 sends the created production plan and machining process information as shown in FIG. 6 to each FM.
It is downloaded to the S control device 7 (step S23).
The machining process information is the information necessary for machining each part registered in the production plan, and includes the machining process, NC program file name, machining machine, cycle time, system process and after machining is completed by the FMS. FMS NO. And a system process of a post process.

Each FMS control device 7 that has received the production plan and machining process information retrieves one item of data from the production plan in the schedule creation section 22 (step S2).
4) It is determined whether or not the process completion information shown in FIG. 7 has a part number of the retrieved data and a system process and the number of OKs is 1 or more (step S25). The process completion information is data for notifying the FMS control device 7 that processes the subsequent process that the work is ready when the processing for the process registered in the processing process information is completed in each FMS control device 7. . When the process completion information of the retrieved data is found, the process can be performed immediately, so that a schedule is created (step S26). If the process completion information of the retrieved data is not found, it is determined that the processing of the previous process or the input of the material has not been completed yet, and the schedule is not created. This process is performed for all the production plans (step S27), and the production plans received from the central processing unit 1 are selected so that they can be processed immediately.

When the creation of the schedule is completed, the FMS control unit 7 causes the machining control unit 23 to unload the work of the parts and processes designated by the schedule from the automatic warehouse 5, and controls the machining with the numerically controlled machine tool 11. (Step S28).

When the numerically controlled machine tool 11 notifies the FMS controller 7 of the completion of machining (step S2
9), the FMS controller 7 reads the machining process information of the relevant part in the next process determination unit 24, and reads the next FMS NO. Take out the same FMS in the next process
It is determined whether or not to process (step S30). Next F
MS NO. If nothing is registered in, it is determined that the same FMS is used for processing. When the next process is also processed by the same FMS, the next data of the completed process is read from the process process information, a schedule is created, and the process is subsequently controlled (step S32). When the next process is processed by another FMS, the next FMS NO. The process completion information is created and notified to the FMS controller of the next system process of the machining process information (step S31). In this way, each FMS control device 7 performs processing until all the production plans received from the central processing unit 1 are completed (step S33).

On the other hand, the FMS control device 7 which has received the process completion information (step S41), the process completion information notifying section 2
In 5, the production plan is read, and it is determined whether or not there is data in the production plan that matches the part number of the received process completion information and the system process (step S42). If there is the matching data, it is determined that the preparation of the work is completed, the schedule of the relevant part is created, and the machining is controlled (step S43). If there is no matching data, this process completion information is saved in order to wait for the production plan to be downloaded from the central processing unit 1 (step S44). The saved process completion information will be used by the schedule creation unit 22 when the production plan is downloaded from the central processing unit 1.

[0013]

As described above, according to the process control apparatus of the present invention, according to the production plan received from the central processing unit,
Since each FMS control device progresses the processing while notifying each other of the process completion information, even if the central processing unit goes down in the middle, the processing can be progressed only by each FMS control device. Even if the control device goes down, it can be easily restored by adjusting the process completion information, and a flexible production system can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a process control apparatus of the present invention.

FIG. 2 is a first flowchart showing an operation example of the device of the present invention.

FIG. 3 is a second flowchart showing an operation example of the device of the present invention.

FIG. 4 is a diagram showing an example of a part manufacturing plan used in the device of the present invention.

FIG. 5 is a diagram showing an example of a production plan used in the device of the present invention.

FIG. 6 is a diagram showing an example of processing step information used in the device of the present invention.

FIG. 7 is a diagram showing an example of process completion information used in the device of the present invention.

FIG. 8 is a configuration diagram showing an example of a general production system.

FIG. 9 is a block diagram showing an example of a conventional process control device.

FIG. 10 is a flowchart showing an operation example of a conventional device.

[Explanation of symbols]

 20 Production Plan Creation Department 21 Production Planning / Machining Process Information Download Department 22 Schedule Creation Department 23 Machining Control Section 24 Next Process Judgment Section 25 Process Completion Information Notification Section

Claims (1)

[Claims] 1. An FM for performing group management control of a plurality of FMSs.
In a production system including an S control device and a central processing unit for centrally managing these, a production plan creating means for creating a production plan in each FMS according to a production plan of parts, and the above-mentioned created in each FMS control device The central processing unit is provided with a production plan / machining process information download means for transferring the machining process information in which the production plan and the information necessary for machining the parts are registered, and the next process is processed by the transferred machining process information. A process completion information notifying means for notifying the FMS control device of the number of OK completions and the number of NG completions, and for notifying the process completion information of the preparation completion of the parts, the transferred production plan and machining process information, and the notification. Schedule creating means for creating a machining schedule for the parts completed up to the previous step based on the process completion information; The machining control means for controlling the machining according to the schedule, and each time the machining is completed, it is determined whether the next step is to be processed by the same FMS or another FMS. A process management device, wherein the FMS control device is provided with a next process determination means for transferring completion information to the corresponding FMS control device.