JPS5840251A - Work machining method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for parallel production in a line in which a plurality of lines are provided with a processing instruction method, and workpieces that have passed through each of these lines are processed in parallel production on a separate line. This invention relates to a method for appropriately performing processing on a line.

A tracking method and a tag method are known as methods for simultaneously assembling vehicles with different specifications on one line. The tracking method is such that information such as the specifications and model of a car is stored in advance in a computer for each vehicle, and the memory is sequentially forwarded according to the workpiece moving through the machining stages of the line, and each stage is This method outputs signals to the machine and instructs the machine to select the appropriate parts, process the parts, and direct them to the destination. However, when this method is adopted, the efficiency of the system may deteriorate. In other words, in this method, the computer outputs each cutting instruction data based on the premise that the workpieces are sent in the set order, so if there is a workpiece withdrawal or interruption in the middle of the line, the The memory must be corrected by feeding back the information to the computer each time. When the number of workpiece withdrawals and interruptions increases, the efficiency of the system deteriorates.

On the other hand, the tag method is to attach a tag that stores information such as specifications to the workpiece to be soldered to a work jig or conveyor hanger in the initial process of the line, and the workpiece is used for each process on the line. In this system, the tags are sequentially read by a reader during the process of movement, and work instructions for each process are given according to the read contents. Therefore, in this method, the machining details are sequentially read from the tag, and since the tag is attached to the workpiece, even if the workpiece is pulled out or interrupted in the middle of the line, it will not be memorized like the tracking method. It has the advantage that no correction is required, and even if equipment malfunctions in one process, other processes are not affected.

For the above reasons, the tag method is being adopted, but it is not possible to make a complete transition from the tracking method to the tag method in a short period of time, so both methods are being adopted as a transitional stage.

The problem here is that up to the middle of processing, one of the above methods is used on one upstream line, the other method is used on another upstream line, and then those methods are used. This is a case where the processed workpieces are mixed and processed on only one line on the downstream side. In other words, for workpieces processed using the tracking method, processing instructions must be given by a computer up to the final process, and for workpieces processed using the tagging method, processing instructions must be given by reading the tag until the final process. An appropriate processing instruction method must be applied to each workpiece in only one parallel production line.

If this processing instruction method is not performed properly, that is, in parallel production lines, the processing instruction method using the tag method will be applied to workpieces processed using the tracking method.In other words, processing instructions using the tag method will not be applied because no tags are attached to the workpieces. In the opposite case, the vehicle will be assembled with specifications different from the original.

Therefore, the present invention provides a parallel production line on the downstream side in a line where the processing instruction method is different for each upstream line, and the workpieces processed on those lines are processed by co-flowing into a separate downstream line. In order to properly perform the above processing, a mark identifying the upstream line is attached to the workpiece, the mark is detected between the upstream line and the downstream parallel production line, and the downstream line is identified in accordance with the detection signal. This is a processing method in which processing instruction data is set in the control device of the parallel production line.

The present invention will be described in detail below based on embodiments shown in the accompanying drawings. The figure shows an embodiment of the present invention.

This embodiment deals with the case where the upstream line 10 where processing instructions are issued using the tag method and the upstream line 20 where processing instructions are issued using the tracking method flow together in a parallel production line 40 on the downstream side. It is something. Workpieces on the line 10 have already been affixed with tags in which predetermined machining instructions are recorded, and in the line 10, the record is read by a reader @ 11, and the control device 12 is activated according to the read content. Controls processing equipment (not shown).

It is supposed to be done. After the workpiece has passed the line 10, a display 13 is provided to indicate where the workpiece has passed the line 10. After that, the workpiece is transported to the parallel production line.

On the other hand, when a workpiece enters the line 20, the control device 21 is activated and requests data including processing instruction contents from the processing instruction device 1130 using a tracking method, and the data is stored in the shift register 22 in the control device 21. Processing instruction data is output from the shift register 22 for each process,
A processing device (not shown) is put into operation. After the workpiece passes through the line 20, a display 23 gives an indication that the workpiece has passed through the line 20. After that, the work is transferred to the parallel production line 40.
transported to.

In front of the parallel production line 40, the parallel production line 40
A detector 41 is provided to detect whether the workpiece entering the line has passed through line 10 or line 20. Further, the #2 stage of the parallel production line 40 is provided with a reading device @42 that reads processing instruction data recorded on a tag attached to a workpiece. and receives data from the detector 41 and data from the reader 42,
A control device 43 having a shift register 44 is provided. This control device 43 receives machining instruction data from the machining instruction device 30 regarding the workpiece that has passed through the line 20 (a line using a tracking method), and receives the machining instruction data from the shift register 441. : Regarding the workpieces that have been stored and passed through line 10 (line using the tag method), the reading device @4
2 reads the tag, and the resulting processing instruction data is stored in the shift register 44. The control device 43 instructs the processing device to perform processing according to each stage in accordance with processing instruction data stored in the shift register 44.

Next, the operation of the above embodiment will be explained. The workpiece that has passed through the line 10 is marked with an indication by the display device 13 that the workpiece should be processed by the tag method, and the workpiece that has passed through the line 20 is marked by the display device 23.
An indication indicating that the workpiece should be processed by the tracking method is attached.

First, when the workpiece that has passed through the line 10 comes to the detector 41, the detector 41 generates a signal 10s.

This signal 10s is a signal indicating that the processing instruction data of the portion of the shift register 44 corresponding to the #1 stage of the parallel production line 40 is not required. When the workpiece moves to the #1 stage of the parallel production line 4o, the shift register 44 has not yet stored machining instruction data regarding the workpiece. Next, when the workpiece moves to the #2 stage of the parallel production line 40, the control device 43 sends a start signal to the reading device 42, which causes the reading device f42 to read the processing instruction data from the tag of the workpiece, and instruct the processing instruction. Data is taken in and stored in the shift register 44. Thereafter, the workpiece is processed according to the processing instruction data.

On the other hand, when the workpiece that has passed through the line 20 comes to the detector 41, the detector 41 generates a signal 20s. This signal 2
0s is the parallel production line 4 of the shift register 44.
This signal indicates that the processing instruction data of the portion corresponding to the #1 stage of 0 is required.At the same time, the reading device 42 sends a data request signal to the processing instruction device 30, and the processing instruction device 30 sends the data to the shift register 44. Processing instruction data using the tracking method is sent, captured and stored.

Thereafter, the workpiece is processed in a predetermined manner at each stage according to the processing instruction data stored in the shift register 44.

As a result, regardless of whether the work passing through the line 10 enters the parallel production line 40 earlier or later than the work passing through the line 20, or whether one of them enters the parallel production line 40 consecutively, the processing on the parallel production line 40 will continue. done properly. Therefore, when transitioning from the tracking method to the tag method,
There is no need to switch to the tag method for all lines, and even if some lines are switched to the tag method, reliable assembly can be performed. In addition, as a method of display using a display device, it is also possible to attach a different tag to the jig or hanger and use that tag to display the mark.Alternatively, the paper on which the mark is printed can be attached to the jig or hanger. It is possible to use a conventionally known method such as pasting it on.

As described above, the present invention is applicable to a line in which the processing instruction method is different for each upstream line, and the workpieces processed on those lines are mixed and processed in a separate downstream line. An identification display is attached to the workpiece, the display is detected between the upstream line and the downstream parallel production line, and processing instruction data is set in the control device of the downstream parallel production line in response to the detection signal. This has the advantage that processing on the parallel production line can be carried out appropriately.

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. 10... Line by tag method, 20... Line by tracking method, 13.23... Display device,
30... Processing instruction device, 40... Parallel production line, 41... Detector, 42... Reading device, 43.
...control device, 44...shift register.

Claims (1)

[Claims] In a processing line that is equipped with a plurality of upstream lines that process workpieces using mutually different processing instruction methods, and a downstream parallel production line that processes and transports a mixture of workpieces that have passed through the lines, An identification mark is attached to the work by a display means, the mark is detected by a detection means provided between the upstream line and the downstream parallel production line, and based on the signal from the detection means, the downstream parallel production line A method for machining a workpiece, characterized in that machining instruction data is set in a control device to instruct each process.