JPS61286964A - Device used for production control - Google Patents

Abstract

PURPOSE:To grasp the actual results of production in a production plant correctly by storing a processing program for successively storing the work advancing time of a work to be processed on the basis of information transmitted from each working group in a processor. CONSTITUTION:A CRT terminal 41 and a printer 42 are connected to a host computer arranged in a computer room C and plural minicomputers 10a-10n arranged in a minicomputer room D are also connected to the host computer 4 through an interface 43. One computer 10n out of the computers 10a-10n is connected to plural magnetic card issuing machines 51a-51n arranged in a production control room F to issue magnetic cards 7. On the other hands, the remaining computers 10a-10n-1 are connected to arriving card readers 8a and worker's card readers 8c arranged in plural working groups G1-Gn to collect working status data from respective working groups G1-Gn.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for use in production management, and in particular to processing work performance data of each of a plurality of work groups in a production factory using a computer. This relates to a device for accurately grasping costs and accurately managing complex work schedules.

<Prior Art> In a production process in a mass production factory where there are few types of products, processing and assembly are performed in the order of steps, and the number of steps and the working time of each step are set in advance. therefore,
The production results and manufacturing costs of individual workpieces are relatively well understood. In such mass production factories, the number of products produced can be determined by directly counting the number of times machines start and stop and the number of workpieces being transported. Recently, production and facility maintenance management has been progressing using so-called OA equipment, such as outputting data such as the operating rate and failure rate of individual machines and lines using computers.

On the other hand, a machining factory that produces a wide variety of products usually consists of multiple work groups equipped with machinery and tools for each process. The workpiece, together with the parts drawing and process chart, is processed between each work group in the order of the process and finally transported to the assembly process. Workers in each work group find the machining locations specified in the process sheet from the parts drawings and perform the machining to the shape, dimensions, and accuracy specified in the drawings.

At this time, the worker performs the work with the set-up time and processing time estimated in advance by the construction company, but depending on factors such as the difficulty of the work, the skill level of the worker, the machine's ability, and the processing accuracy of the previous process. Differences occur between the actual work time and the estimated time.

Setup time and processing time are calculated based on estimation criteria.

Even if this estimation standard is periodically reviewed through time studies and other methods to ensure consistency between the construction estimate and the actual situation on site, due to the factors mentioned above, the standards themselves become multiple and lack practicality. Therefore, the estimation standard must be set at an average level.

<Problems to be solved by the invention> For this reason, in such conventional methods, variations occur between the working time and estimated time for individual workpieces, making it difficult to plan precise production schedules or This made it difficult to calculate the correct cost of parts.

Therefore, it is an object of the present invention to provide a system for accurately grasping the production results in a production factory. Another purpose is to provide a system that can systematically set the time required for construction estimates and the time required for work on individual parts.

<Means for Solving the Problems> The present invention provides a recording medium in which an identification code, etc. of a work object is recorded, which is attached to the work object and sent to the production site, and a medium reading means for reading the recorded contents of the recording medium. and a progress information input means for inputting data indicating the progress of a series of operations on the work object, such as completion of acceptance of the work object, work start, work completion, etc., are installed at each of the plurality of work groups at the production site. A processing device connected to the medium reading means and progress information input means installed in the plurality of work groups is installed in the central processing room, and the processing device that is connected to the medium reading means and the progress information input means installed in the plurality of work groups is installed to process the work objects that have arrived at each work group in each work. The information is transmitted from the group to the processing device, and information indicating the progress of the work is transmitted to the processing device each time the work progresses on the work object that has come to each work group. The present invention is characterized in that a processing program is stored that sequentially accumulates and stores the times at which the work on the work object has progressed based on information transmitted from each work group.

When the work object with the recording medium arrives at the work group, the worker reads the contents of the recording medium with the medium reading means and inputs acceptance completion information using the progress information input means. . As a result, information on the identification code of the work object accepted by the work group and acceptance completion information are transmitted to the processing device, and the time when this acceptance information is received is stored in the storage means. Then, the next operation, for example, operation (), is performed on the workpiece accepted into this work group at both times, and the above operation is performed again, and the time when the work on the workpiece moves to the next operation. data are sequentially stored in the storage means of the processing device.

Furthermore, even after the work object is transported to a different work group, the same processing is performed in the transported work group.

As a result, data on the progress of work in each work group and the time when the work progressed is accumulated and stored in the storage means of the processing device for each work object.

Therefore, by analyzing this cumulatively stored data, it is possible to easily grasp the actual working time and the like in each work process.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 schematically shows the concept of this embodiment.

Based on the parts drawings designed by engineering department A, engineering department B and computer room C create the necessary forms for production control.

First, the flow of work performed by the work group responsible for each process of machining will be described below.

The parts drawing 1 is given a part number (hereinafter simply referred to as part number) to be distinguished from other drawings. Usually, several parts diagrams constituting a certain device are listed together in a parts specification table 2 along with their part numbers. The parts diagram 1 and parts list 2 are sent together to engineering department B, where the process and order of the processes for machining the part are determined. The setup time and processing time for each process are estimated based on the estimation criteria, and a process sheet 3 as shown in FIG. 2 is created. This process sheet 3 is sent to the computer room C together with the parts list 2. In the computer room C, the product number, number of processes, process, registration date, specified date of process completion, load time consisting of setup time and processing time, etc. recorded in the process sheet 3 are inputted 7) and registered in the process master of the host computer 4. be done.

After this, the process sheet 3' is printed out. A magnetic card issuing machine 5 is connected to the computer 4, and one magnetic card 7 is issued for each process.

For example, in FIG. 1, workpiece W is in work group 3K.

80, 20, . . . , 8, 10 magnetic cards 7 corresponding to the 10 steps are placed in a bag together with the parts drawing 1 and the process sheet 3'.

The bag is transported together with the material to a work group 3K that performs mechanical processing, for example, milling processing. The conveyor places the material and the bag on the workpiece receiving stand 3, takes out the magnetic card 7 from the bag, presses the arrival button Sj of the arrival card reader 8a shown in FIG. Pass the magnetic card 7 through the slit. After this, the send button 9a is pressed.

As a result, data indicating that the workpiece W has arrived is transferred to the minicomputer 10 together with data such as the product number of the workpiece W recorded on the magnetic card 7. When the mini-computer 10 determines that these data have been transferred from the arrival card reader 8a to the work group 3, it stores in the storage device 11 the fact that the workpiece W has been sealed to the work group 3K together with the arrival time. do.

In addition to the arrival card reader 8a, each work group 01 to Gn is provided with a schedule card reader 8b and a worker card reader 8C, which have the same configuration as the arrival card reader 8a. These card readers 3a, 8b, 3
As shown in FIG. 3, in addition to the arrival button Sj, button c is provided with buttons Sa-wsi for start of setup, start of processing, completion of processing, interruption, completion of interruption, scheduling, and transport to the next process. Further, each work group 01 to On is provided with a CRT terminal 12 having an intelligent function.

After the workpiece W arrives, the boss of each work group G1 to On,
Press the scheduling button sh of the schedule card reader 8b, hang the magnetic card 7 on the reading head 9,
Press the send button 9a. As a result, an assignment data input screen is displayed on the screen of the CRT terminal 12, and the boss of each work group 01 to Gn
data indicating the assignment to each worker and the machine used is input, and such data is transferred to the minicomputer 10. Thereby, the mini-computer 10 stores information on the person in charge of the work and the machine used in the work group for each workpiece W in the storage device 11.

Thereafter, when the workers in each work group G1 to On perform setup and machining on the assigned workpiece W, the workers in each work group G1 to On perform setup and machining at the time of start of setup, the time of start of machining, and the time of completion of machining.

When transporting the next process, after pressing the corresponding push button on the worker card reader 8C, the magnetic card 7 is inserted into the reading head 9.
and press the send button 9a.

As a result, "setup", "processing", "
At the time when each work of "transportation" is started and completed, data such as the product number and data corresponding to the pressed button are transferred to the minicomputer 10, and the minicomputer 10 is identified by the product number. It is stored that the work on the workpiece W has progressed, and also stores the time when the work has progressed. Note that the card readers 8a, 8b, and 8c are also provided with buttons for interrupting and completing the interruption, and the interruption start time and interruption completion time are also stored in the storage device 11 of the minicomputer 10. There is. Card reader 8 mentioned above. The CRT terminals 12 are provided in all of the plurality of work groups G1 to Gn, and when the workpiece W that has been processed in the work group 3K arrives at the next work group 80, the work paper is also transferred to the work group 80K. Processing similar to 3 is performed.

In this way, data representing the contents of the workpieces W that have arrived at each of the plurality of worksheets G1 to Qn and the progress status of work on each of the workpieces W is stored in the storage device of the minicomputer 10. All will be recorded on 11.

Then, the host computer 4 coupled to the storage device 11 via the minicomputer 1O causes the storage device 11 to
Analysis of the data stored in is performed, and each work paper 01 to G
The actual setup at n, calculation of machining time, comparison of these times with estimated times, etc. are performed, and these analytical data are printed out.

Next, a more specific example will be described.

In Fig. 4, C is a computer room, D is a mini-computer room, E is a production site, and F is a production control room.The production site E has a large number of work papers G1 to Qn, and the work is divided according to process. ing.

A CRT terminal 41 and a printer 42 are connected to the host computer 4 installed in the computer room C, and a plurality of minicomputers 10a installed in the minicomputer room C are connected via an interface 43.
~10n.

Mini computers 10a to 10 in the mini computer room
One mini-computer Ion out of n is connected to multiple magnetic card issuing machines 51a to 51n installed in the production control room F.
The production control room F issues magnetic cards 7. In the case of this embodiment, data such as the serial number, product number, number of products in process, process name, load time, estimated setup time, estimated processing time, etc. are recorded on the magnetic card 7.

On the other hand, the remaining minicomputers 10a to ton-1 in the minicomputer room read the arrival card readers 8 installed on the plurality of work papers G1 to On through the ink face.
a and the worker card reader 8C, each work paper G
Work 1 situation data is collected from 1 to Gn.

Furthermore, the mini-computer 10a NIon-r and the host computer 4 are coupled to the optical loop 20 via optical control devices 163 to 16n, respectively.

This optical loop 20 is laid so as to pass through each of the work papers 01 to Gn at the production site E, constructing an endless data highway. A CRT terminal 12 installed on each work paper G1--Q11 is connected to this optical loop 20 via an optical interface 13,
CRT terminal 12 of each work paper 01 to On, host computer 4 and mini computer 10a to 1Qn-1
It is now possible to communicate with.

Note that the schedule card reader 8b and printer 14 provided on each of the work papers 01 to On are connected to the optical loop 20 via the CRT terminal 12.

FIG. 5 shows data files formed in the storage devices of the host computer 4 and the minicomputers 103 to Ion+, and shows the data files formed in the storage devices of the host computer 4 and the minicomputers 103 to Ion+.
Arrival file 601 allocation file 61 and LOG file 62 are formed in the storage device of Ion-1, and progress data file 6 is formed in the storage device of host computer 4.
5 and a cumulative file 66 are formed.

As shown in FIG. 6(a), the arrival file 60 includes parts information corresponding to the workpieces W that have arrived at each of the work sheets G1 to On, that is, the magnetic cards sent from each of the work sheets G1 to On. As shown in FIG. 6(b), the assignment file 61 stores the information of each workpiece W arriving on each worksheet 01-Gn.
This registers data indicating which worker is assigned to process the item and which equipment and machine is used to process the item. Also, LOG
The file 62 includes each work paper 0 as shown in FIG. 6(C).
For each of the workpieces W that arrived at 1 to Gn, the arrival time, assignment completion time, setup start time, machining start time, machining completion time, next process transportation time, etc. are cumulatively stored.

On the other hand, the progress data file 65 of the host computer 4
stores the machining process of each workpiece W that is input when creating the process chart, and also stores the product number, name, estimated setup time, estimated machining time, etc. of each workpiece W in each work process. The cumulative file 66 stores the time data cumulatively stored in the LOG file 62, and the contents of the LOG file 62 are transferred at regular time intervals.

Next, the operation of the above-mentioned device will be explained.

(A) Collection of production status data In order to collect work status data from each industrial group 01 to Gn, the following process is performed.

(A-1) Operation upon arrival of workpiece When the workpiece W arrives at each work group 01 to Gn, the transporter or receiving worker uses the arrival card reader 8 as described above.
After pressing the arrival button Sj of a, the magnetic cards 7 attached to each workpiece W are hung on the reading head 9 one after another, and finally the sending button 9a is pressed. As a result, the contents of the magnetic card 7 corresponding to each workpiece W and the arrival button S
Information indicating that j has been pressed is transferred to the minicomputers 10a to Ion-1 in the minicomputer room.

These mini-computers 10a-10n+ are equipped with arrival card readers 8a provided in each work group G1-Gn.
, schedule card reader 8b.

When data is transferred from any of the worker card readers 8c, the process shown in FIG. 7 is executed.

From which work group was the data transferred in the first place?

100), and then, based on the transmitted data, determine the type of button that was pressed (101a) to (10
1e).

Then, as in this case, when the arrival button is pressed, this is determined in step (101a), and the arrival processing after step (110) is performed.
), the parts information read by the reading head 9,
In other words, the arriving file 60 contains data such as the product number, estimated setup time, estimated processing time, etc., along with the data of the accepted work group.
After that, in step (111), the data of the time when the arrival of each workpiece W was recognized is stored in L.
Register in the OG file 62. Further, after this, a process of writing the arrived data into the progress data file 65 of the four host computers is performed (112).

(A-2) Operation at the time of work assignment After the workpiece W arrives at each work group Gl-Gn, the boss of each work group 01 to Gn allocates the work to each worker, and Data to mini computer 10
Perform processing to transmit data to a to Ion+. That is, after pressing the scheduling button sh of the schedule card reader 8b, the foreman places the magnetic card 7 corresponding to the workpiece W into which the assignment data is to be input onto the reading head 9.

As a result, any one of the mini-computers 10a to Ion-1 executes the process shown in FIG.
) is completed, the schedule card reader 8
No. 9 appears on the screen of the CRT terminal 12 located adjacent to b.
The data input screen shown in Figure (a) is displayed. The boss is
While looking at this input screen, input the number of the worker who will perform the work and the number of the equipment and machine to be used. Note that since one workpiece W may be machined by two people, multiple sets of these data can be input for one workpiece W.

After completing the input of work assignment data as described above,
The boss operates the processing buttons on the CRT terminal 12. As a result, the input data is transferred to the mini-computers 10a to Ion+ via the optical loop 20,
These mini-computers 10a, N10n, and Violet store in the assignment file 61 data representing which person is to process each workpiece W and which equipment and machine are used to process it (121). Subsequently, the time at which the assignment data for the workpiece W is transferred is stored in the LOG file 62 as the assignment completion time for the workpiece W (122).

(A-3) Operation from setup start to machining completion When each worker performs setup or machining work on the assigned workpiece W, the setup start switch must be pressed before starting these operations. After operating the processing start switch sb, hang the magnetic card 7 on the reading head 9, and press the send button 9.
Press a.

As a result, data such as the product number recorded on the magnetic card 7 and data for identifying the pressed button are transferred to the mini-computers 10a to Lonl. Further, the operator performs similar operations by pressing the corresponding push button when processing is completed, when the work is interrupted, and when the interruption is completed.

When these operations are performed, the mini-computers 10a-
Ion+ performs the process shown in FIG.
1c) In ~(101d), determine which buttons were pressed and record the times at which these pushbuttons were pressed in the storage area corresponding to the product number of each workpiece (130)
.

(A-4) Operation when transporting the next process When each worker completes processing the assigned workpiece W and transports it to the next work group, the transporter at this point The process transport button Si is pressed, and then the magnetic card 7 is read.

In this case, the mini-computers 10a to 10n-! from step (100) to steps (101a) to (101e)
), the process moves to step (140), records the next process transportation start time in the LOG file 62, gives instructions to the host computer 4, and writes data indicating that the work in the group has been completed to the progress data file. 65 (141).

Further, following this, the contents of the arrival file 60 are updated, and data corresponding to the workpiece W for which the work has been completed is deleted from the arrived workpiece data group corresponding to the work group (1
42).

(B) Production status analysis processing The computer room C performs the following analysis processing based on the data cumulatively stored in the cumulative file 66.

(B-1) Actual calculation processing of setup, machining time, etc. When a command for such processing is input by operating the CRT terminal 41 connected to the host computer 4, the host computer 4 executes the flowchart shown in FIG. Step (2
This is determined in step 00a), and the actual time is calculated in steps (210) and subsequent steps. That is, the host computer 4 searches for time data related to the workpiece W worked in the designated work group from among the time data recorded in the cumulative file 66 (210), and then performs a search based on the searched time data. For each workpiece W, the following (1)
- (3) are calculated to calculate the stagnation time, setup time, machining time, and lead time which is the total of these times (211).

Stagnation time = (Setup start time - Arrival time) + (Next process transportation time - Machining completion time) ... (11 setup time = Machining start time 1st step start time ... (2) Machining time = Machining completion Time - Processing start time... (3) Lead time - Next process transportation time - Arrival time... (4) And step ('21
In 2), these data are output to a printer. FIG. 10 Tal is a list output in this way, and shows the setup time.

The processing time is printed out in association with the estimated time input at the time of process estimation, and the ratio of the actual time to the estimated time is also printed out.

(B-2) Operation time output processing for each equipment machine When such processing is instructed, the host computer 4 performs step (2)
00b) to (,220'), each work group G is
Search for time data regarding the workpiece processed by the specified machine among the machines installed in 1 to Gn (2
20), Calculate the time period and operating time in which the machine was used based on this data (221), (222), and output this in the format shown in Figure 10 (b) (22).
3).

Furthermore, in addition to the above-described processing, the host computer 4 also displays the production results consumption status by group and worker.

Performs various analyzes such as the stagnation status of parts in each work group, the existence of specified parts at the production site, and work status output.

(C) Online inquiry at production site In each work group G1 to G'n, when a specific command code is transmitted to the minicomputers 10a to Ion 1 and the host computer 4 through the CRT terminal 12, the minicomputers 10a to 10n- 1. Host computer; y4 performs inquiry processing based on internally stored information. FIG. 9(b) is an inquiry screen showing a list of workpieces W that have arrived on a predetermined work sheet. They are displayed in order of processing priority, and for those for which the assignment has been completed, the name of the person in charge of the work is also displayed. Is displayed.

When displaying such a reference screen, the mini-computers 10a to Ion+ display the product number data of the workpieces W that have arrived in a specific group and the associated load time (load time) from the storage contents of the arrival file 60. Search and output (time = setup time + work time x number of work in process), etc. The priority order data is inputted from a CRT terminal 41 (not shown) provided in the production control room F, transferred to the mini-computers 10a to 10n+, and written in the arrival file 60.

As described above, the times of assignment, start of setup, start of machining, completion of machining, etc. for the workpiece W that arrived on each work paper are memorized,
Since the actual setup time and processing time are calculated based on this, the actual state of production can be accurately grasped even in high-mix, small- to medium-volume production sites.

Further, as described above, by using the cumulative data, it is possible to easily grasp the operating status of each work sheet, the operating rate of equipment and machinery, etc.

FIG. 11(a) shows an embodiment in which the system according to the present invention is used to automatically transfer numerical control data to numerically controlled machine tools placed on each of the work sheets G1 to Gn.

In this embodiment, numerical control devices NCI to NCn arranged on work sheets 01 to Gn are connected to a host computer 4 in a computer room C via an interface (2). As shown in FIG. 11(b), the host computer 4 discriminates the type of workpiece and the processing process based on the magnetic card information transferred from each work paper 01 to Gn (300), and then performs this discrimination. Search for NC program data that corresponds to the type of workpiece and machining process.
1), this is transferred to the numerical control devices NCI to NCn arranged on each work paper 01 to Gn (302).

Therefore, the NC program necessary for machining can be automatically transferred, and productivity can be greatly improved.

Note that the present invention is applicable not only to production sites where workpieces are processed, but also to production sites where assembly work is performed.

<Effects of the Invention> As described above, in the present invention, a recording medium on which an identification code, etc. of a work object is recorded is attached to the work object and sent to the production site, and a medium for reading the recorded contents of the recording medium is provided. A reading means and a progress information input means for inputting data indicating the progress of a series of operations on the work object, such as completion of acceptance of the work object, work start, work completion, etc., are installed in each of a plurality of work groups at the production site. , data to specify the setup start time, processing start time, processing completion time, etc. for each workpiece that arrived on each work paper was collected from the production site to a central computer. It is possible to accurately grasp the actual setup time and processing time for each workpiece that arrives on the work paper. Therefore, even in production sites where high-mix, low-volume, and medium-volume production, such as machine tool production sites, it is possible to accurately grasp the working time for each work process performed on each workpiece, and to perform precise This has the advantage of making it possible to plan production schedules and accurately calculate individual manufacturing costs for each workpiece.

Another advantage is that based on the accumulated data, it can be used for production management such as grasping the load status of each work paper and predicting the load status.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall view showing the concept of this embodiment, FIG. 2 is a diagram showing an example of the process chart in FIG. 1, and FIG. FIG. 4 is a block diagram showing a specific system configuration, and FIG. 5 shows data formed in the storage devices of the host computer 4 and minicomputers 10a to Ion+. Diagram showing the file, Figure 6(a)
, (b), (C) are arrival file 6 in Fig. 5.
01 assignment file 61. 7 is a diagram showing the operation of the mini-computers 10a to 10n-1 in FIG. 4, and FIG. 8 is a flowchart showing the operation of the host computer 4 in FIG. 4. Figure 9 (al, (bl is C in Figure 4)
Diagram showing the screen displayed on the RT terminal 12, No. 10
Figures (a) and (bl are diagrams showing an example of a list output by the host computer 4, Figure 11 (a) is a block diagram showing a modified example of the present invention, and Figure 11 (inside) are Figure 11 (a). ) is a flowchart showing the operation of the embodiment shown in FIG. 4...Host computer, 7...Magnetic card, 8
a, 8b, 8c...Card reader, 9...Reading head, 10.10a-1On-t...Mini computer, 12...CRT terminal, 60...Arrived file, 61... Assignment file, 62... LOG file, 65... Progress data file, 66... Cumulative file, C... Computer room, D... Mini computer room, E... Production site, F...・Production control room, G1-Gn...Work group, W...Workpiece.

Claims (1)

[Claims] (1) A device used for production control at a product production site, which is a device that carries a recording medium that records the identification code, etc. of a work object, along with the work object, and that is connected to a plurality of devices installed at the production site. Each of the work groups is provided with a medium reading means for reading the recorded contents of the recording medium corresponding to the work object that has arrived at each work group, and a medium reading means for reading the recorded contents of the recording medium corresponding to the work object that has arrived at each work group, and a medium reading means for reading the recorded contents of the recording medium corresponding to the work object that has arrived at each work group, and a medium reading means for reading the recorded contents of the recording medium corresponding to the work object that has arrived at each work group, and a medium reading means that reads the recorded contents of the recording medium corresponding to the work object that has arrived at each work group, and a medium reading means that reads the recorded contents of the recording medium that corresponds to the work object that has arrived at each work group, and a medium reading means that reads the recorded contents of the recording medium that corresponds to the work object that has arrived at each work group, and a medium reading means that reads the recorded contents of the recording medium that corresponds to the work object that has arrived at each work group. A progress information input means for inputting data indicating the progress of a series of operations on the object is installed, and the central processing room is connected to the medium reading means and the progress information input means installed in the plurality of work groups. A production management system characterized in that a processing device is installed, and the processing device is stored with a processing program that sequentially cumulatively stores the time when work on a work object has progressed based on information transmitted from each work group. Equipment used.