JPS60213470A - Method of controlling schedule in fms - Google Patents

Abstract

PURPOSE:To flexibly and effectively promote work at each workshop by automatically evaluating processing schedule data including a lot dividing procedure, a pallet dividing procedure, and an order dividing procedure on the basis of all work schedule data. CONSTITUTION:All work schedule data 1 is instructed to an FMS computer whereby processing schedule data 1a is extracted and a lot dividing procedure 2 is executed. Namely, a pallet number calculation means 2a evaluates the desired number of pallets based on the number W of workpieces to be processed and the number N2 of works which can be placed on one pallet. Then, a completion day number calculation procedure on the first portion of a processing lot number calculation procedure extracts a processing interval d1 based on columns in which an initiation data and a delivery date are listed, and evaluates the number of days during which the processing in question is anticipated to be completed, and estimates lots gamma from which completed works are delivered out at the same day on a later stage 2c. Then, a pallet dividing procedure 3 allocates the number of required pallets to their completion date referring to lot gamma, summarize them in a file which provides a pallet division number. The order dividing procedure 4 adds an order number, the order of priority, processing initiation dates, and completion date to said file and sends the file to a processing procedure planning for use in schedule management.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a schedule management method in FMS (Flexible Manufacturing System), and in particular,
Based on the entire work schedule that has been comprehensively set up for the production management system of the entire factory, a processing schedule is automatically calculated based on the data of each lot and each pallet, and the work of each department is promoted. Regarding schedule management methods, factory automation has progressed recently, and we are entering the era of FMS, which responds to various and flexible needs in terms of quantity and variety, rather than the traditional mass production method or small-scale precision method. In this era, creating work schedules that rely on human subjectivity and thinking as in the past is highly flawed, and the standards for creating work schedules are based only on the work side, the machine side, or the tool side. If we do so, it will be biased and inadequate. Therefore, the schedule management method in FMS is based on the comprehensive all-work schedule of the factory production management system.
It must also be able to flexibly respond to occasional interruptions, taking into account a variety of data from the tool side, and make effective use of schedules for each part.

In view of the above-mentioned problems, an object of the present invention is to collate data for each lot and each pallet based on a comprehensive work schedule of a factory production management system, and to flexibly provide room for interruptions. It is an object of the present invention to provide a schedule management method that automatically calculates a machining schedule and efficiently promotes the work of each part based on the machining schedule.

In order to achieve the above object, the present invention provides a lot division procedure that calculates the required number of pallets and the required number of processed rotors based on the entire work schedule data of FMS, and a lot division procedure that calculates the required number of pallets and processing lot numbers based on the total work schedule data of FMS, and the method of dividing each pallet into each lot based on the calculated values. Checking the pallet division procedure to be allocated and the above allocation, the processing start date,
The present invention is characterized in that machining schedule data is created including a machining end date and an order division procedure for setting priorities.

Hereinafter, the present invention will be explained in detail with reference to examples and drawings.

FIG. 1 is a schematic diagram of an FMS line suitable for implementing the present invention.

In FIG. 1, the system is roughly composed of a management department and a work department, and the management department includes a line management control section 100 and a general management control section 101. The line management control unit lOO controls the flow of each processing process while the system is online.
Back printing is performed flexibly according to the schedule, and the general management control unit 101 located above it comprehensively grasps and manages NC data as preparation information, tool management data, machining schedule data, setup schedule data, etc.

The line management control unit 100 and the comprehensive management control unit 101 are
Communication control units (CUs) are connected via modems (modems) to transmit and receive data.

In the work department, the main controller 102 is the line management control unit 10
The data sent every moment from 0 to each NC machine 103a
, 103b, 103c, 103d N'C device 104a
, 104b, 104c.

A command is given to 104d. Along with the line management control unit 100, the main control device 102 and the NC devices 104a and 104b
, 104c, and 104d are linked to the optical data highway 105 through NLLI (network linkage
The necessary data is imported as and when required via the unit). The main controller 102 also controls unmanned trolleys 108. It is also connected to a ground platform 110 that controls the stacker crane 109. Furthermore, there is an operation panel 112 located at the setup station 111 that mainly controls manual setup operations, and a terminal 1al 1 that displays setup information input and setup instructions.
3 is connected.

The worker calculates the load and creates the setup schedule data J4? according to the schedule management method of the present invention, which will be described later.
and outputs the processing schedule data by operating the terminal 113, and confirms the work schedule for -day.

At the setup station 111, the necessary workpiece and pallet are selected from the work storage 114 and pallet storage storage 1]5, and the installation is carried out at the station 116.
Attach the workpiece to the pallet using the necessary jigs and tools.

The pallets P that have been prepared according to the schedule for that day are stored in the setup-side pallet stocker 117. Various types of pallets are prepared in the pallet storage 115 described above. The type of pallet depends on the workpiece (=j
It is determined by the number of pieces loaded and the processing method. Figure 2 shows examples of various pallets on which workpieces are mounted.

The flat plate ball shown in Figure 2 (a)) POI is usually one or more.
Although four workpieces can be attached, loading one workpiece is appropriate in a process in which the workpiece is machined from five directions, and four workpieces may be attached in a process in which the workpiece is machined from only one direction. Convex paren 1-P02 (Figure 2 (B)) is for attaching two workpieces, and prismatic baren) PO3 (Figure 2 (C)) is for machining with four workpieces attached to each surface. suitable for. The pallets PO4 and PO5 shown in 2nd TgJ (D) and 2nd (E) are examples of special pallets (L-shaped, triangular prism), and may be adopted depending on the processing method. Requires a pallet.

Additionally, different types of pallets are available depending on the work size.

Under the control of the FMS control systems shown in FIG. 1, the pallets P prepared in the setup-side pallet stocker 117 are temporarily held at a predetermined position in the machine-side pallet stocker 118 by the stacker crane 109. Main controller 102
According to the command, the desired pallet P is transported by the unmanned cart 108, and is carried into, for example, the NC machine 103b of process MC49.

The processed Baleno) P is transported by the unmanned trolley 108.
It is transferred to the next process or placed on the machine side valent stocker 118.

FIG. 3 is an explanatory diagram showing an example of a schedule management method in a processing schedule creation procedure according to the present invention. Third
In the figure, all work schedule data 1 is sent from the host computer that comprehensively manages the entire factory production.
This is an instruction to the MS computer (FIG. 1, general management control unit 101), and the FMS computer first extracts processing schedule data 1a as shown in Table 1 from the entire work schedule data 1.

The above data 1a is further sorted according to the FMS process extraction criteria, and only the schedule data of FMS workplace C1 having the corresponding machine code in FMS, for example MC49 in the table above, is extracted, FM3 schedule data 1b as shown in Table 2 is created.

Table 2 (FMS daily schedule data) As shown in FIG. 3, this FM3 schedule data 1b is first subjected to the loft division procedure.

In the loft division procedure ↓, two calculation procedures are performed in parallel. In the pallet number calculation procedure 2a, the number of workpieces to be processed W (for example, W-15) is extracted from the quantity data in Table 2, and the number of workpieces that can be placed on one pallet n2 is extracted from the work data standard file 21 (No. Summer 2013, as shown in Table 3), and P=W/n2 is calculated as the required number of pallets.

n2 is determined by the type of pallet selected according to the method of processing the workpiece, and is usually 1. 2.
It is an integer value of 4 or 8. If n2-2 is assumed, the required number of pallets P will be 15/2-7.5, but of course, since this is the number of pallets, the decimal places are rounded up and P=8.

Next, in the completion days calculation procedure 2b, which is the first stage of the addition T lot number calculation procedure, the processing period d1 is first extracted from the start and delivery date markers in Table 2 (page 10). here,
If we consider the 15 workpieces in question through the two processes No. 12 and No. 3, they will be delivered to the FMS line MC49 on January 30, 1984, and the deadline for completing processing is February of the same year. It is the 6th day,
Although it is shown in Table 2 and is dl-8, normally the calendar of the factory itself is introduced in the work data standard file 21, and for example, February 4th and February 5th are If it is Thursday, subtract the two days and dl-
Calculate the value of 6 days.

Further, when the shortest machining period d2 according to the machining work content is determined from the work data standard file 21, the number of days in which machining is expected to be completed during the machining period is calculated as D= (d 1 + l) − d 2 be done. An example of the work data standard file 21 is shown in Table 3. Note that the work data standard file 21 is prepared for each work.

Table 3 (Work data standard file) □□□□□□□;Z 1, (1(H,!, usually based on the following principle) stored in this file.

(a) One day is required for one process per pallet.

(b) 1 process refers to the process from setup to setup.

(c) If there is no setup, it is counted as one process.

(d) Holidays shall be excluded from the number of days.

Therefore, if NO', 2 and NO33 in Table 2 above correspond to N091 and No. 2 in Table 3, each requires setup, so it is calculated as two processes, and the shortest machining time is d2-2. It becomes a day. and D= (6+1
)-2=5, and the expected number of days for completion D=5 days.

Now, the required number of pallets P is obtained by the number of pallets calculation procedure 2a in FIG. 1, and the number of completion days calculation procedure 2b
When the expected number of days for completion is obtained, the subsequent stage 2c of the processing lot number calculation means calculates the lot γ for sending out the completed work on the same day by setting γ=N/D. If the required number of panels P is 8, and you try to complete them sequentially within 5 days, one unit per day,
In other words, 5 processing lofts are prepared, and the remaining 3 machines are prepared.
Therefore, it is necessary to consider the lot allocation of pallets corresponding to .

The distribution is examined in the next step, pallet division step 3. First, it is examined in comparison step 31 whether the lot T is smaller than 1, and if it is, simple allocation method 3a is used to calculate the amount from the delivery date. Allocate a completion date for each pallet retroactively, and if γ is larger than 1 and there is a surplus, use excess allocation method 3b to complete the required number of pallets each day retroactively from the delivery date. The pallets corresponding to the remainder are assigned completion dates one day after the delivery date, and the results are compiled into a file in the form of a pallet division number added 3C.

This file is immediately sent to the next step, order division step 4, and is first given an order number in number addition step 4a.
Next, in data addition step 4b, the priority, processing start date,
The processing end date is added.

FIGS. 4(a), (b), (c), and (d) illustrate the schedule creation procedure in the above-mentioned specific example.

FIG. 4(A) shows that 15 workpieces W are machined between the start date of the machining period d1-6 and the delivery date based on the FM3 schedule data (Table 2). Based on this, in Fig. 4 (b), the number of workpieces that can be placed on baren 1- is n2 (=2) from the work data standard file (Table 3).
is extracted and the number of pallets P=W/n2=8 is calculated. Next, the pallet number P1 is placed on the barn) P on which the workpiece W is placed.
゜P2. , , Pv, pa are added.

FIG. 4(C) shows the loft division procedure (FIG. 3, 2). The shortest processing period d2 is 2 days, and the expected number of completion days D = (d++1>-d2 = 5 days, so the number of lots is 5, and the lot r = P/D = 10 and 3. Pallets Pl, P2 .P3゜p4.ps is the first machine of lot γ, and pallets PS, P?, and P8 are the second machines of lot T. A1 or A2 is added to each pallet as a pallet division number.

In the pallet division procedure in Figure 4 (d), the baren 1-PI is
and pallet division number A1 are assigned sequentially from the 50th node T5. When the allocation is completed, each pallet is assigned the above-mentioned pallet division number AI, and A2 is assigned the lot division number L.
2.3.4°5 is added. The processing schedule for each pallet is shown in Figure 4 (E), January 30th, pallet 1 of Ronto T1.

Pallet p+ of 50th soto T5 starting from toto P5 (A11 as schedule number) and delivery date February 6th
(Schedule number Al5) and up to pallet P6 (Schedule number A25) are processed by the NC machine 103b in process MC49. This means that the schedule has been determined. This schedule is completed as the order data file shown in Table 4.

Table 4 is -da data file) In the lower margin No. 4-i: , the bullet numbers P1 to P8 are as follows:
In the case of the number of pallets P=8 in the above embodiment, numbers are given for convenience in order to distinguish between the eight pallets. Then, on these pallets PI to P8, the pallets,
1. In item 4 of the table where the schedule number assigned in the division procedure and lot division procedure is shown in a format such as AAOOl, 1.1, the lower ] digit indicates the opening/throat division number, and the lower 2
The number in the 10th place indicates the pare-nod division order. That is, for example, the schedule number AAOO115 of the p+ pallet shown in list number No. 67 indicates that it will be placed in the lot of p+ pallet no. P6 Bale Nodo's AAOO125 is the same No. as P6 Palesoto.

It is placed at the opening of 5/1, indicating that it is processed in the second order. Since one car was installed per day on the completion date, in this example, the expected completion date D=5 days, T1 to γ
There will be 5 units of 5. In the pare-nod division procedure, this T1~
Pallets are assigned to γS every day from the delivery date, so P1→γS,,P2−shiγa1. ．． ．． ps-
It becomes +11, Pri.

- Returning to TS, the assignment was P7→14, PR-γ3. Arithmetically, every time we add the value 1 of P, T
is processed by a computer by subtracting the value 1 from γ−
When it becomes 0, it is sufficient to return it to γ-5 and add 1 to the 1st and 0th digits. The order data file is a document for schedule management, so it is organized in schedule order and is shown in Table 4 (Table 1).
As shown in page 8), the pallet numbers are irregular. In Table 4, the start date indicates the arrival date of the workpiece, and the end date indicates the end date of processing. Priority 5 means normal, 3 is used for urgent cases, and 1 is used for urgent cases.
Its usage is optional.

The schedule diagram showing the allocation of lots and pallets is shown in the fifth section.
It is a diagram. As shown in the figure, pallets P1 to P8 are allocated to lots γS to γ1 from the delivery date side. This is because the processing policy in the FMS to which the present invention is applied is "just-in-time delivery," and by giving weight to the later stages of the schedule and providing some margin in the earlier stages, flexibility in changes is created. Also, if we look at Figure 5 as the machine-schedule area diagram shown in Figure 6, it means that the ideal area allowed by the given data is automatically calculated, and the change response area B and the emergency response area. The distribution leaves C evenly,
This will make effective use of the schedule.

The above order data is sent to the next step, the processing/setup schedule 5, and is used for schedule management.

As explained above, according to the present invention, it is possible to automatically calculate a machining schedule that is fully flexible for data comparison between lots and pallets and for interruptions, based on a comprehensive all-work schedule. , F.M.S.
The processing schedule can be managed efficiently.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an FMS line suitable for implementing the present invention, Fig. 2 is an explanatory diagram showing examples of various pallets on which workpieces are attached, and Fig. 3 is a schedule for the processing schedule creation procedure in which the present invention is implemented. An explanatory diagram showing an example of a management method,
Figures 4 (a), (b), (c), and (d) are diagrams illustrating the creation procedure in a specific example, Figure 5 is a schedule diagram, and Figure (i) is an area diagram. 100,... line Management control unit 101, , comprehensive management control unit 102, , main control device 103a to 103d, , NC machine LO4a to 10
4d, NG device 105, optical data highway 108, unmanned trolley 109, stacker crane 111, setup station 113, terminal 114, work storage 115, valet Storage 116,..., installation is at station 1.17. ,, Setup side bullet stocker POI~PO
5, ,Pallet 1, ,FMS process data search procedure 200. Standard file matching procedure 306. Data processing procedure 411, alternative process setting procedure 500. Job data formant procedure 50, ..., Total work schedule data 51, ..., Job data 52, ..., FMS process standard file 53, ..., Work data standard file 54, ..., Takt time standard file 55, ..., Alternative process Standard file 56, Format standard file 61, Loading setup 62, Lowering setup 63, Setup processing 64, Cross processing Patent applicant Hitachi Seiki Co., Ltd. Figure 2 (A) Figure 5 Figure 6 Processing period procedure master letter (spontaneous) To the Commissioner of the Patent Office (To the Chief Adjudicator of the Patent Office) (To the Examiner of the Patent Office) 1. Indication of case Patent application 1982-70, Title of invention Schedule management method in FMS 3. Relationship with the case of the person making the amendment Applicant address: Hitachi Seiki Co., Ltd. (foreign name) 4. Agent address: 5-5 Higashikanda 2-1-11, Chiyoda-ku, Tokyo 101, subject of amendment 6, Amendment Contents (1) On page 22, line 19 of the specification, "rFMs process data search procedure" is replaced with "all work schedule data"
I am corrected. (2) In the 20th line of page 22, the words "rate file matching procedure" are corrected to read "loft division procedure." (3) In the first line of page 23, the words "data processing procedure" are corrected to "palette division procedure." (4) In the second line of page 23, the phrase "alternative process setting procedure" is corrected to "order division procedure." (5) In the third line of page 23, the words "job data/formant procedure" are corrected to "processing/setup schedule." (6) r50. on lines 4 to 14 of the 23rd true. ,,All work schedule data...64. ,,Delete the 11th line that says "cross processing". 1. Indication of the case Japanese Patent Application No. 1987-70198 2. Title of the invention Schedule management method in FMS 3. Person making the amendment Relationship with the case Applicant address Name: Hitachi Seiki Co., Ltd. 4, Agent address: 2-1-11 Higashikanda, Chiyoda-ku, Tokyo 101
No. 6, Subject of amendment (1) Application form (2) Brief description of drawings in the manifest 7, Contents of amendment (1) As shown in the attached sheet (2) Page 21, lines 20 to 20 of the specification Page 22, line 2 H
[Figure 4 (a), (b), (c), and (d) are diagrams illustrating the creation procedure in a specific example]. , (d) and (e) are diagrams illustrating the creation procedure in specific examples.''

Claims (1)

[Claims] In a schedule management method for managing a work schedule by creating a machining schedule for each workpiece through data arithmetic processing from all work schedule data of an FMS. Number of pallets and required processing opening. A lot division procedure that calculates the number of bullets, a Belen I-division procedure that allocates each bullet to each lot based on the calculated value, and a processing start date, processing end date,
and an order division procedure for setting priorities, and creating machining schedule data.
How to manage schedules in S.