JP2921991B2 - Unmanned operation scheduling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unattended operation work scheduling apparatus for creating an operation schedule during an unattended operation time zone. There are factories that operate machine tools unattended during unmanned operation hours (for example, at night). At this time, it is desired to automatically create an unattended operation work schedule.

[0002]

2. Description of the Related Art Conventionally, a work schedule for a machine (WS) such as a machine tool that performs high-mix low-volume production has been developed.
Since the operation time of the machine tool and the operation time of the operator were the same, when changing the schedule, the work schedule was changed manually, and when the setup change was necessary, the Is going. Therefore, every time the work schedule is changed, the setup time is checked and the setup change is performed.

[0003]

Therefore, when a work schedule for operating a machine tool or the like at night is created, it is necessary to manually perform a setup change operation when the setup change occurs during a time when there are no workers. In addition, there is a problem that it is difficult to cope with a sudden change in the work schedule.

[0004] It is an object of the present invention to eliminate setup change during an unattended operation time zone when creating a work schedule, and to enable unattended operation without manual setup change work.

[0005]

FIG. 1 is a block diagram showing the principle of the present invention. In FIG. 1, process development 2 is for developing work orders for the number of processes based on a preset number of processes. The unmanned operation dispatching 3 selects a WS (such as a machine tool) to which the work order 5 of the same setup code 5-2 is assigned when the unmanned flag 5-1 of the work order 5 is on, and temporarily determines the WS. Highest priority work order 5
Is repeatedly assigned to the WS of the provisional determination.

[0006]

According to the present invention, as shown in FIG. 1, when the unmanned operation dispatching 3 turns on the unmanned flag 5-1 of the work order 5 created from the order, the same code as the setup code 5-2 (the same setup) is used. W) is assigned before
S is selected and the work WS is provisionally determined, and then the work order 5 of the highest priority among the work orders 5 is selected and the provisionally determined WS is selected.
To create a work schedule for unmanned hours.

[0007] Therefore, by eliminating the occurrence of setup change during the unmanned operation time zone when creating the work schedule, it is possible to automatically create a work schedule capable of unattended operation without manual setup change work.

[0008]

Next, the structure and operation of an embodiment of the present invention will be sequentially described in detail with reference to FIGS. FIG. 1 shows a principle block diagram of the present invention. In FIG. 1, a processing apparatus 10 includes a program for performing various processes such as lot division, process development 2, unmanned operation dispatching 3, etc., a memory 4,
It comprises a work order 5, and files such as a work order file 6 and a master file 7.

In the lot division, the input order is divided into production lot orders for each lot based on a preset maximum lot size and minimum lot size. The process development 2 is for developing a work order for each process based on the number of processes set in advance for the production lot order.

The unmanned operation dispatching 3 has a setup code 5 when the unmanned flag 5-1 of the work order 5 is on.
-2 The work in the unmanned time zone is repeated by selecting a WS (machine tool, etc.) to which the work of the same code is assigned before and tentatively determining, and assigning the highest priority work order 5 to the tentatively determined WS. It performs order scheduling. When the time is not the unmanned time zone, any one of WS (machine) in which dispatching (not shown) is performing a similar work, WS having a higher priority, and WS capable of starting work fastest is temporarily determined for each work order. , Slack time (grace period until delivery date) among these provisionally determined work orders
Is specified, the work order within the specified range time is assigned, and when the assignment of the work order is not specified, and when the work order within the range time is completed, the work order priority rule is applied The selection of the priority work order is repeated to schedule the work order in the manned time zone.

The memory 4 stores the work order 5 and the like and performs various processes. The work order file 6 is a file for storing the work order 5. The master file 7 is a file for storing various data (for example, remaining man-hours and priorities of work orders). Terminal 8
Is composed of a display, a keyboard, a mouse, etc., and is used for inputting an order from a customer by a key, displaying a scheduling result, and the like.

Next, the overall configuration and operation will be described with reference to FIG. In FIG. 2, a step S1 creates a production order 11 by manually inputting the order from the terminal 8 or inputting the order from the file I / F. Here, manufacturing order 1
As shown on the right side, 1 includes a column for storing a part number, a quantity, a delivery date, and the like of a part in association with a manufacturing order number.

In step S2, the lot is divided. That is, the production order 11 created by inputting in S1 is divided into production lot orders for each lot. In step S3, the process is developed. This is divided into the production lot order in S2 and then developed into the work order 5 for each process. S4 is the work order 5 created by the process development of S3.

In step S5, unmanned operation dispatching is performed. As shown in FIG. 3, which will be described later, when scheduling at night (unmanned operation time), when the unmanned flag 5-1 of the work order 5 is on, the work of the same code as the setup code 5-2 is performed first. The assigned WS is selected, and the highest priority work record 5 is assigned to this WS. When the time is not the unmanned time zone, WS (machine) in which dispatching (not shown) is performing a similar operation, and W having a higher priority
S or WS which can start work fastest is provisionally determined for each work order, and when a slack time (grace period until delivery date) is specified among these provisionally determined work orders, it is within a specified range of time. When the assignment of work orders, not specified, or work orders within the range of time has been completed, for all work orders, the work order priority rule is applied and the highest priority work order is selected repeatedly. Scheduling of work order for obi.

According to the above processing, when the unmanned flag 5-1 of the work order 5 is on in the unmanned time zone, the WS to which the work having the same setup code as the setup code 5-2 is assigned before is selected. Then, by repeatedly assigning the work order 5 with the highest priority to the WS, it is possible to eliminate the setup work in the unmanned time zone and automatically create a work schedule capable of unmanned operation without manual setup change work. Become. The details will be sequentially described below.

FIG. 3 is a flowchart for explaining the operation of the present invention. (1) In the case of performing work scheduling at night (unmanned time zone) (YES in S11), when the unmanned flag 5-1 is on, a work having the same setup code 5-2 as the work order 5 is allocated earlier. Search for WS (Y in S12)
ES, S13), when there is a corresponding WS (YES in S14), or when the manned time is stopped and the setup ends (when the setup is performed, YES in S15), W is set in S17.
S is provisionally determined, the highest priority work order is selected in S18 and assigned to the provisionally determined WS, and S11 and the subsequent steps are repeated to perform nighttime work order scheduling.

(2) On the other hand, when night work scheduling is performed, when the unmanned flag 5-1 is turned on and there is no WS to which a work having the same setup code 5-2 has been previously allocated (S11). YES, S12 YES, S
13, NO in S14) or when performing nighttime work scheduling, where the unmanned flag 5-1 is turned on,
When the work having the same setup code 5-2 is not assigned to the previous WS and the setup is not completed within the manned time (YES in S11, YES in S12, S13, S14)
NO, S15: NO), there is no WS to which the work order can be assigned without any setup, so the scheduled work start date is set to the next day in S16. When the manned time zone of the next day comes, the work order is assigned to WS in S17 and S18.

(3) In addition, when it is not nighttime (in the case of a manned time zone, S11: NO), or when there is no unmanned flag 5-1 of the work order 5 even in the nighttime (YES in S11, (NO in S12), the work order is assigned to the corresponding WS in S17 and S18 in the daytime (manned time zone). By the above processing, the unmanned flag 5-1 and the setup code 5-2 are provided in the work order 5, and the work scheduling assigned to the WS corresponding to night (unmanned time zone) is performed for the set work order 5. This makes it possible to perform unmanned operation without any changeover during nighttime work.

FIG. 4 is an explanatory diagram of work orders that can be assigned. FIG. 4A shows a case where the work of the setup code “code A” is assigned to WS during manned time to perform the work. In this case, during the unmanned time (for example, at night), only the work (work order) of the setup code “code A” can be assigned to the WS. Thereby, the setup change of the WS during the unmanned time does not occur, and the unmanned operation can be performed.

FIG. 4B shows a case where a work order which can be assigned is assigned from 30 minutes before the end of the manned time and work is performed. In this case, the work order that can be assigned 30 minutes before the end time of the manned time is the work order with the reception code of A, or the reception is completed within 30 minutes (the setup change is completed within 30 minutes). Work order.

FIG. 5 shows a specific example of the present invention. FIG. 5A shows a state before work assignment. Here, the hatched portion indicates nighttime (unmanned time zone). FIG. 5B shows W
The work (work order) assigned to S is shown. Here, operations (A-1) and (A-2) have the same setup, (B-1),
(B-2) and (B-3) are the same setup.

FIG. 5C shows a state after work assignment. Here, in the unmanned time zone in the shaded area, the assignment is performed only when the setup code is the same as the previously assigned work. For example, although the completion of the work A is the unmanned time zone in the shaded area, the work (A-1) using the same setup code
Is assigned continuously. On the other hand, the completion of the work (A-2) is the unmanned time zone in the shaded area, but since there was no work of the same setup, the work (B-1) is allocated from the head of the manned time zone the next morning. . Similarly, the completion of the operation (B-2) is the unmanned time zone indicated by the hatched portion, but the operation (B-3) of the same setup is allocated subsequently.

FIG. 6 shows an example of work scheduling according to the present invention. Machine A (unmanned machine) runs unattended (17:30)
８8:30), the work order X of the same setup code,
Y and Z are sequentially allocated, and when there is no more work order with the same setup code, it becomes empty. And manned time (8:
30)), work orders a, b, c, d,
e are sequentially assigned.

The machine B (unmanned machine) operates in unmanned time (17:
30 to 8:30), when work orders X, Y, Z, A, and B of the same setup code are assigned, when the last work order B is completed, manned time has already been set. Followed by work order a, which does not have to be the same setup code,
b, c, d, and e are sequentially allocated. The machine C (unmanned machine) schedules unmanned items (here, C and D) at manned hours when the machine is in a slack state.

The machine D (manned machine) is in the manned time (8: 3
Only during the period from 0 to 17:30), work orders a, b, c, d, e, and f for creating manned items are sequentially assigned.

[0026]

As described above, according to the present invention,
Unmanned flag 5-1 and setup code 5 in work order 5
-2, and when these are set, the setup code 5
-2, because the work order having the same setup code as that of -2 is assigned to the WS in the unattended time zone assigned before, the occurrence of setup change during the unmanned operation time zone is eliminated, and manual steps are performed. A work schedule for performing unattended operation without replacement work can be automatically created.
Thereby, (1) WS (machine such as a machine tool) can be operated efficiently at night (unmanned time zone).

(2) The work of changing the schedule for the changeover is not required.

[Brief description of the drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a flowchart illustrating the overall operation of the present invention.

FIG. 3 is a flowchart illustrating the operation of the present invention.

FIG. 4 is an explanatory diagram of work orders that can be assigned.

FIG. 5 is a specific example of the present invention.

FIG. 6 is an example of work scheduling according to the present invention.

[Explanation of symbols]

 2: Process development 3: Unmanned operation dispatching 4: Memory 5: Work order 5-1: Unmanned flag 5-2: Setup code 6: Work order file 7: Master file 8: Terminal 10: Processing device 11: Manufacturing order

Continuation of the front page (56) References JP-A-1-18020 (JP, A) Masayasu Ohgushi "On scheduling of molding process in plastic molding plant", IE Review, No. 30, Vol. 1 (1989), pp. 31-36, Hideyuki Yamamoto et al. "Scheduling System for Forming and Processing by Personal Computer", Plastics, Vol. 40, no. 8 (1989) pp. 27-35 Yotaro Shima et al. “Development of Injection Forming Process Scheduling System,” Bulletin of Intec Research, No. 28 (1990), pp. 73-89

Claims (1)

(57) [Claims] 1. A unmanned task scheduling apparatus for creating a work schedule for unattended operation time zone, and means for unattended flag work orders Work created from the order order in unattended operation time period is determined on, the unmanned When the flag is determined to be ON, a means for temporarily selecting a WS (machine) in which the setup code is performing the same work and temporarily determining the work WS, and selecting the highest-priority work order from all the work orders. W
Unmanned driving task scheduling apparatus characterized by comprising: means for allocating to S, the unmanned operation dispatching consisting.