JPH06106464A - Production control system - Google Patents

Abstract

PURPOSE:To correct experience data automatically even if works are pulled out in the middle of a production line. CONSTITUTION:Data carriers 8 are attached to respective works to be carried in order in plural processes, and information writing reading devices 6 to the data carriers 8 are arranged in the respective processes, and these information writing-reading devices 6 are connected to a process experience control system 4. The process experience control system 4 has a production indication issuing part 2 to send out production indication data on the respective works to the respective information writing-reading devices 6, an experience data collectin part 3 to collect experience data read out by the respective information writing- reading devices 6 and a process experience data correcting part 11 to carry out correction on the experience data by recognizing the works removed from a production line in the middle of the processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production management system for accurately ascertaining the actual production status of each process by using a data carrier having a plurality of processes attached to a work to be sequentially transported. is there.

[0002]

2. Description of the Related Art Automatic production equipment such as robots is installed in a production line in a factory in recent years, and these equipments are respectively connected to a computer to automatically manage a production process and grasp a production performance situation. It is possible.

Further, in the process control, each work (one mounted on a pallet, which is to be sequentially transported through a plurality of processes, is used.
Data carriers are attached to multiple products), and an information writing / reading device for exchanging information with the data carrier is arranged in each process, and these information writing / reading devices are process result management consisting of a computer. It is under study to control the production of each process by connecting to the system.

FIG. 6 shows a conventional process control system using a data carrier. Work is a pallet (9)
While being placed on, the conveyor (10) sequentially conveys each process. A data carrier (8) such as an optical ID unit is attached to the pallet (9).

Further, an information writing / reading device (6) capable of exchanging information with the data carrier (8) is arranged in each process, and these information writing / reading device (6) is operated by a sequencer or the like. It is connected to the process result management system (4) through the constituted device control device (5). The process performance management system (4) comprises a production instruction issuing unit (2) and a performance data collecting unit (3).

The production planning data issued from the production planning system (1) is supplied to the equipment control device (5) as production instruction data via the production instruction issuing unit (2) of the process result management system (4). As a result, production instruction data is written from each information writing / reading device (6) to the data carrier (8).

By subjecting the work to a predetermined process in each step, new data is written in the data carrier (8), and the data is read by the information writing / reading device (6) in the next step. Be done. The read data is collected and accumulated by the performance data collection unit (3) of the process performance management system (4). Then, after the end of production, the collected performance data is sent to the daily report creation system (7),
It is output as a daily report.

[0008]

By the way, in the production line as described above, when a defective product occurs during the process,
Defective products are removed from the production line. In this case, the quantity at the time of input of the production line and the quantity at the time of shipment are different, and the data consistency cannot be maintained. Therefore, in the conventional production management system, the operator operates the keyboard or the like to input the number of the removed works and the serial number thereof into the process performance management system (4) to correct the performance data. However, the above-mentioned correction work is extremely complicated and has been a major obstacle to the complete automation of production control.

In view of the above problems, it is an object of the present invention to provide a production management system capable of performing accurate production performance management by automatically correcting performance data even if a work is pulled out on the way. Is.

[0010]

In the production control system according to the present invention, a data carrier (8) is attached to each work to be sequentially transported through a plurality of processes, and the data carrier (8) is attached to each process. An information writing / reading device (6) for exchanging information with (8) is arranged, and these information writing / reading device (6) is connected to the process performance management system (4) to manage the production of each process. Done.

The process result management system (4) includes a production instruction issuing unit (2) for sending production instruction data for each work to be produced to each information writing / reading device (6), and each information writing / reading device. Based on the result data collection unit (3) that collects the result data read by (6), and the work that has been removed from the production line in the middle of the process based on the collected result data, correct the result data. And a process performance data correction unit (11) for performing.

In the process result data correction unit (11) of the process result management system (4), the identification code of the passed work and the identification code of the non-passed work are discriminated and registered for each process. A storage unit (13) and a table data update processing unit (14) for updating the management table based on the performance data from the performance data collection unit (3) are provided.

[0013]

First, the production instruction issuing unit (2) of the process result management system (4) sends the production instruction data of the day to each information writing / reading device (6) at the start of production, whereby each The process recognizes the production plan and executes a predetermined process on the conveyed work.

In each step, when a predetermined process for the work is completed, the actual result data is stored in the information writing / reading device.
Written to the data carrier (8) by (6). Then, when the work to which the data carrier (8) is attached advances to the next step, the record data written in the data carrier (8) is written by the information writing / reading device (6) installed in the step. The data is read and sent to the performance data collection unit (3) to collect the performance data.

In this process, when a work is removed from the production line due to, for example, the occurrence of defective products, the work does not pass through the next process, so that the performance data collecting unit (3) collects the performance. Lack of data occurs. Therefore, the process performance data correction unit (11) recognizes that the work has been removed based on the lack of performance data, and corrects the performance data.

In the construction in which the process result data correction unit (11) is provided with the management table storage unit (13) and the table data update processing unit (14), first, based on the production plan data, all the works to be produced are to be produced. Is registered in the table storage unit (13). Then, the table data update processing unit (14) determines whether or not each work has passed based on the performance data from the performance data collection unit (3) every time the processing in each process is completed,
The management table is updated.

When the planned production is completed, the process performance data correction unit (11) totals the unpassed works in each process based on the final management table, and further corrects the performance data based on the result. To do. The corrected performance data is output as a daily report as needed.

[0018]

According to the production management system of the present invention, even when a work is pulled out on the way, the fact is automatically recognized based on the performance data and the performance data is corrected. It is possible to perform accurate production performance management.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, a data carrier (8) is attached to a pallet (9) on which a work is mounted, and the pallet (9) is conveyed by a conveyor (10) to form a plurality of processes (n processes) constituting a production line. ) Are sequentially passed.

An information writing / reading device (6) capable of exchanging information with the data carrier (8) is arranged in each step, and these information writing / reading device (6) is composed of a sequencer or the like. It is connected to the process result management system (4) via the device control device (5). The process performance management system (4) includes a production instruction issuing unit (2) and a performance data collecting unit.
(3) and the process performance data correction unit (11).

The production planning data issued from the production planning system (1) is supplied to the equipment control device (5) as production instruction data via the production instruction issuing unit (2) of the process result management system (4). As a result, production instruction data is written from each information writing / reading device (6) to the data carrier (8).

By subjecting the work to a predetermined process in each step, new data is written in the data carrier (8), and the data is read by the information writing / reading device (6) in the next step. Be done. The read data is collected by the performance data collection unit (3) of the process performance management system (4), and is further corrected by the process performance data correction unit (11).

After the completion of the predetermined production plan, the actual result data that has passed through the process actual result data correcting unit (11) is sent to the daily report creating system (7) and is output as a daily report.

FIG. 2 shows a more specific configuration of the production management system, which is the information writing / reading device.
(6) is composed of an optical ID input / output head (61), and the device control device (5) is composed of a device control sequencer (51).

The process result data correction unit (11) includes a management table creation unit (12), a table storage unit (13), a table data update processing unit (14), a non-passed product data processing unit (15), and a product. It is composed of a data storage unit (16).

The production planning data sent from the production planning system (1) is sent to the production instruction issuing unit (2) and at the same time, the management table creating unit (12) in the process performance data correcting unit (11). Sent to. In the management table creation unit (12),
Based on the transmitted production plan data, the number of management tables corresponding to the number of processes is created for each optical ID input / output head (61). The created table is stored in the table storage (1
It is stored in 3).

As shown in FIG. 3, the management table has a column for writing the serial number of a non-passed work, a column for writing the serial number of an already-passed work, and a column for writing the passing time. In the initial state of, the serial numbers (“0001” to “0150”) of all the works to be produced are displayed in the column of unpassed numbers in FIG.
Is written.

On the other hand, the production instruction issuing unit (2) shown in FIG. 2 issues a production instruction to the equipment control sequencer (51) based on the transmitted production plan data. In response to this, the device control sequencer (51) is
The production instruction data is written to the optical ID unit (81) on the pallet via (61).

During the course of the production process, the production record data created by the device control sequencer (51) is written from the optical ID input / output head (61) to the optical ID unit (81), and the written data is In the next step, the light I installed in the step
It is read by the D input / output head (61).

The record data read by the optical ID input / output head (61) is sent to the record data collecting section (3) through the device control sequencer (51). Regarding the data taken in the performance data collection unit (3), first, all the data is sent to the product data storage unit (16), and at the same time, only the data related to the serial number is sent to the table data update processing unit (14). .

Here, the product data storage unit (16) is an optical ID.
The unit (81) holds the product information (lot number, product name, inspection result, past defect history, etc.) that has been registered in each process for each work, and each time new data on that work comes up, The data holding contents are updated.

On the other hand, the table data update processing unit (14) selects a management table for the process for which data is to be updated from the table storage unit (13) and passes the data carrier (8) of the pallet (9). The serial number received from is deleted from the unpassed number column of the table. Then, the deleted serial number is entered in the column of the already-passed number in the same table, and the passing time is registered. The table updated in this way is sent again to the table storage unit (13).

The operations from the above-mentioned result collection to the table data update processing are repeated until the end of production, and at the end of production, the production end time is registered in all management tables as shown in FIG.

After that, all the management tables stored in the table storage section (13) of FIG. 2 are sent to the table data update processing section (14), and the serial numbers remaining in the unpassed number column of each table are stored. Take it out. These serial numbers indicate the works that have not passed through the information writing / reading device (6) corresponding to each table.

Here, among the unpassed works, it is necessary to separate the work in between the optical ID input / output heads (61) and the work removed from the production line. Therefore, the maximum time required for the work to move between the optical ID input / output heads (61) is calculated based on the passage time registered in each management table, and the time required for the actual movement is required. If it is within the maximum time, it is determined that the work is a work-in-progress, and other works have been removed from the production line.

For example, the (n-2) th and (n-) th shown in FIG.
It is assumed that the management tables corresponding to the 1) th and nth optical ID input / output heads are registered as shown in FIGS. 5A, 5B, and 5C at the end of production.

In this case, first, the column of the non-passed number of the n-th table is compared with the column of the non-passed number of the (n-1) th table, and the column of the (n-1) th non-passed number is compared. Is deleted, but the serial number that remains in the nth passage number column (here, 0119)
If there is, the work of that number is the (n-1) th light I
D The difference (x seconds) between the time when the I / O head has passed and the end time is calculated.

Further, the maximum time (y seconds) required to move between the (n-1) th and the nth serial numbers is calculated from the passing times of the serial numbers. At this time, if x> y, it is determined that the work of the serial number has been removed from the production line, and the other works are the nth optical ID input / output head and the (n-1) th optical ID. Judge that it is in the middle of the I / O head.

As shown in FIG. 5B, the serial number "01"
The end time of the 19 "work is 17:00:00, and (n-
Since the 1) -th passage time is 16:59:58, the difference x is 2 seconds. On the other hand, the moving time y is determined to be 29 seconds from the passing time of the work having the serial number “0118”. Therefore, x <y, and the serial number "01"
The 19 "work is judged to be a work in process.

Further, the work having the serial number "0117" has passed the (n-2) th optical ID input / output head at 16:58:31 from FIG. 5A, and the end time 17: 00:00
At the time point of, since the (n-1) th has not yet passed, the difference x is 1 minute 29 seconds. Also, it is determined from other data that the traveling time is about 30 seconds. Therefore, it is found that the work of serial number "0117" has been removed from the production line due to the occurrence of defects or the like.

Similarly, the serial number "012"
It is found that the work of 0 ”is a work-in-progress, and the work of serial number“ 0118 ”has passed all the steps.

It should be noted that the work judged to be a work-in-process may include a product actually removed from the production line, but if it is collated with the actual result data of the next day, it is actually removed. The work will be revealed.

In this way, the serial numbers of all the workpieces removed from the production line can be recognized. Further, according to the configuration of FIG. 2, by searching the data of the product data storage unit (16) based on the serial number of the removed work, the product information immediately before the removal of the work can be retrieved. .

As a result, it is possible to send, to the daily report creating system (7), information about the work that has been removed from the production line and is not reflected in the normal performance data processing. Therefore, it is possible to accurately manage the production results, and it is unnecessary to manually correct the actual results data by the operator.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope. The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a production management system according to the present invention.

FIG. 2 is a block diagram showing a specific configuration of a production management system.

FIG. 3 is a chart showing the contents of an initial state of a management table.

FIG. 4 is a diagram showing the contents of the final state of a management table.

FIG. 5 is a diagram showing the contents of the final states of three management tables corresponding to the three processes arranged in the latter stage.

FIG. 6 is a block diagram showing a configuration of a conventional production management system.

[Explanation of symbols]

 (1) Production planning system (2) Production instruction issuing unit (3) Actual data collection unit (4) Process actual result management system (5) Equipment control device (6) Information writing / reading device (7) Daily report creating system (8) ) Data carrier (9) Pallet (11) Process performance data correction unit

Claims (2)

[Claims] 1. A data carrier (8) is attached to each work to be sequentially transported through a plurality of processes, and each process includes an information writing / reading device (7) for exchanging information with the data carrier (8). 6) is placed and these information writing / writing
The reading device (6) is connected to the process result management system (4) to manage the production of each process. In the system, the process result management system (4) provides the production instruction data for each work to be produced with each information. Production instruction issuing unit (2) for sending to the writing / reading device (6)
And a performance data collection unit (3) that collects performance data read by each information writing / reading device (6), and recognizes the workpieces removed during the process based on the collected performance data. A production management system comprising: a process performance data correction unit (11) for correcting performance data. 2. The management which should be registered in the process result data correction unit (11) of the process result management system (4) by distinguishing the identification code of the passed work and the identification code of the non-passed work for each process. Table storage (13) and performance data collection (3)
The production management system according to claim 1, further comprising: a table data update processing unit (14) for updating the management table based on the actual data from.