JPS60108259A - Abnormal pallet processing apparatus in working system - Google Patents

Abstract

PURPOSE:To dispense with the stoppage of a system by providing an abnormality processing station separately from a loading station to transfer a pallet having abnormalities or the like detected to said processing station. CONSTITUTION:The number of a pallet P on a transfer truck 11 transferred to respective machine tools MT1-MTn is read by a pallet detecting unit 12. When said number is different from memorized value in a central processing unit 25, an abnormality signal is generated from an abnormarility detecting unit 31. Then, the central processing unit 25 controls a transfer control unit 28 to transfer the transfer truck 11 to an abnormality processing station 20 so that the abnormal pallet P is transferred to said station 20 and the transfer truck 11 stands by at said station to light an indicating unit. Thus, operation can be always properly carried out without stopping the system at a certain position where abnormalities are easily processed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a pallet abnormality processing device in a Canadian system that detects abnormalities in pallets and processes the abnormalities.

<Prior art> Generally, in a machine tool such as FMS, the pallet number is identified by checking the code code given to the pallet using a measuring device. The workpiece above is machined using machining control data according to the pallet number.

In this type of system, when a pallet inspection abnormality occurs, the system must be stopped and the abnormality displayed;
After a pallet with an abnormality is forcibly removed to the loading station, an abnormality is displayed and the abnormality is handled, but in the former method, the operating rate decreases due to system failure, and the abnormality is not processed. In the latter method, abnormal pallets and normal pallets coexist at the loading station, making it difficult for workers to perform the work for reprocessing. This is a problem that is complicated and prone to operator errors.

<Object of the invention> The object of the invention is to solve the following problems when a pallet inspection abnormality occurs:
The purpose is to make it possible to transport pallets to a position where abnormality processing can be easily performed without stopping the system.

<Structure of the Invention> Fig. F shows the entire apparatus of the present invention, in which a plurality of machine tools M'F1 to MTn are arranged along a conveyance line 10, and pallets carried into these machine tools MTI to MTn. Processing system 1311 data corresponding to the P number is transferred. The conveyance line 10 is provided with a conveyance carriage 11 whose conveyance is controlled by a conveyance control device 28.
Loading station 1 is loaded by this carrier 11.
8 to the machine tools MT"I"MTn and each machine tool MT"I"MTn
The pallet P between the two is transported.

The code code given to the baren I-1) is read by the pallet inspection bag KI2, and the baren numbers 1 to 1 read by the pallet inspection device 12 do not match the commanded pallet number. At this time, the abnormality detection device 31 issues an abnormality signal. An abnormality processing station 20 is installed separately from the loading station I8 in order to process the abnormality of the pallet P in which an abnormality has been detected, and an abnormality is detected when an abnormality signal is issued from the abnormality detection device 31. In order to transport the pallet P to the abnormality processing station 20, the transport control device
The M carriage 11 is controlled. After the necessary abnormality processing is performed at the abnormality processing station 20, the ball I-P is transported to a predetermined machine tool by the transport carriage 11 for reprocessing.

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

In FIG. 2, lO is a conveyance line to which a baren (P) with a workpiece installed is transferred by a conveyance truck 11, and along this conveyance line 10, a plurality of machine tools MTI to MT are transported.
n are arranged at intervals. Each machine tool MT
1 ” M T n has pallet 1 general input II output device P
CI-P Cn is provided, and the pallets P to be processed are carried from the transport vehicle 11 to these barreso NM man-carrying devices PCI to PCn, and the pallets P that have been processed are
The pallet is delivered to the transport vehicle 11 by a pallet loading/unloading device PCI''PCN.A pallet inspection device 12 for reading the code given to the pallet P is provided on the transport vehicle 11. ing.

13 is an automatic warehouse that stores a large number of Ballen l-P,
Along this automated warehouse 13, a pallet loading/unloading line 15 on which a stacker crane 14 is movably mounted is installed. This pallet in/out line 15 and the conveyance line I
A delivery station 16 for delivering the pallets 1-P from the automatic warehouse 13 to the machine tools MTI to MTn and a pallet I) to the machine tools M T 1 = M T n
A warehousing station 17 for entering the automated warehouse 13 from the side is provided, and a loading/unloading station 18 for leading and unloading workpieces onto pallets P along the pallet entry/exit line 15.
is installed.

Reference numeral 20 denotes an abnormality processing station disposed along the transport line 10, and the abnormality processing station 20 is such that a barrel lP in which a foreign product has occurred is transported by a transport cart 11. Necessary abnormality processing is performed by an operator at the processing station 20. The abnormality processing station 20 is provided with a display device for notifying an operator of an abnormality and an operation panel 21 for issuing an operation command after the abnormality has been processed.

Next, the configuration of the control device will be explained.
n is a numerical control device provided corresponding to each of the machine tools MTI to MTn, and these numerical control devices NCI
~NCn is a central processing unit 25 equipped with a disk device 24
The central processing unit 25 transfers numerical control data to each of the numerical control units NGI to NCn.

Further, a transport control device 28 is connected to the central processing unit 25 via an interface 27, and an LJ is connected to the abnormality processing station 20 via an ink face 29.
The operation panel 21 that was installed is connected to the
A lightning detection device 31 is connected to the X lightning detecting device 31 via 0.

The IM transport control device 28 controls the transport of the pallet P by the IM transport vehicle 11, and is connected to the delivery station 1.
6 and warehousing station 17 and each machine tool MTI to M
In addition to controlling the transfer of pallets P between machine tools MTI to Tn, it also controls the transfer of pallets P between each of the machine tools MTI to MTn. That is, the conveyance control device 28 transfers the pallet P carried into the unloading station 16 to the IM carriage 1 based on the command from the central processing device 25.
1, the pallet P is transported to the machine tool MTI, and after processing is completed by the machine tool MTI, it is transported to the machine tool MT2, and the same transport operation is repeated sequentially, and the pallet P, which has been processed by the machine tool MTn, is delivered to the warehousing station 17. transport.

The foreign item detection device 31 generates an abnormal signal when the pallet number detected by the bullet inspection device 12 is different from the commanded bullet number, and this abnormal signal is detected by the central processing unit 25 by an interrupt. When the CPU 25 detects the abnormality, the central processing unit 25
The one-way transport control device 28 is controlled to transport the one-squeezing cart 11 on which the one-way narrowing carriage 11 is placed onto the different processing station 20.

Next, to explain the machining control performed by the central processing unit 25, the disk device 24 stores numerical control data to be transferred to each machine tool MTI to MTn according to the type of workpiece. In the memory of 1., the numbers 1 to 1 and the workpiece numbers are stored corresponding to the machine tools MTI to MTn and each station, respectively. As the pallet P is transferred, the contents a are transferred to the storage area corresponding to the station after the transfer.

When processing a workpiece, the stacker crane 14 moves the pallet from a predetermined address in the automated warehouse 13.
is called, the pallets 5, 1, and P are loaded 1ift into the loading station 18, and the workpiece is attached by an operator. After that, the worker operates the machine, inputs the part number of the workpiece, and operates the machining command switch. As a result, the pallet node P is unloaded from the loading station 18 to the unloading station 1 by the stacker crane 14.
6 will be sent an IM.

On the other hand, when the machining of the workpieces on each of the machine tools MTI to MTn is completed, the central processing unit 25 sends a transport command to the transport control unit 28 to control the transport of the barrel LP by the transport vehicle 11. and said delivery station I6
The ballen l-P with the unprocessed workpiece placed on standby is transferred to the first machine tool MTl, and each machine tool M
Move the balls 1 to P in TI to MTn to the next machine tool MTI to
Sequentially transferred to M T n. However, the central processing unit 25
reads the machining control data corresponding to the number of the pallet 1 carried into the machine tool M Tl "M T n" from the disk device 24 and sets each machine tool MT 1 = MT.
The data is transferred to the numerical control devices NCI to N Cn corresponding to n.

ta carriage 1 to be delivered to each machine tool MTI to MTn
The number of the pallet P supported on the pallet 1 is read by the pallet inspection device 12, and this number is recorded in the memory of the central processing unit 25. It is detected whether the pallet number matches the pallet number a, and if they are different, the foreign item detection device 31 issues an abnormality signal. The central processing unit 25 recognizes the abnormal signal by interrupt, and the third
Execute the process shown in the figure. That is, the central processing unit 25
For example, if an abnormal signal is detected in step 40, step 41
, the transport control device 28 is controlled to transport the transport vehicle 11 to the different processing station 20, the barrel l-P in which the abnormality has occurred is transferred to the abnormality processing station 20, and the transport vehicle 11 waits at that position. . Next, in step 42, the display device installed in the abnormality processing station 20 is turned on to notify the operator that the ballet P in which the abnormality has occurred has been carried into the abnormality processing station 20. This allows the operator to investigate the cause of the abnormality, take the necessary actions, decide whether to continue processing or return it to the automated warehouse 13, issue an instruction to either of these by operating the push button switch on the operation panel 21, and then proceed with further processing. If the process is to be continued, the operation panel 21 is operated to instruct which machine tool the barrel I-P is to be carried into. For example, if the bullet inspection device 12 erroneously identifies the code code of the barrel L-P due to the influence of chips, etc., it instructs to continue machining after removing the chips, etc.
) has been transported by mistake, an instruction is given to return the baren) P to the automated warehouse 13.

As mentioned above, once the necessary processing by the worker is completed,
An abnormality clear signal is commanded, and the central processing unit 25 identifies the clear signal by interrupt and executes the process shown in FIG. 4. That is, when a clear signal of the abnormality signal is detected in step 50, it is determined in step 51 whether or not to continue machining.
Based on the operation command, the ball LP moves to I! The pallet P is transported from the abnormality processing station 2o to a predetermined machine tool by the feeding truck 11, and if machining is not to be continued, a pallet return command is output in step 53. After being transported and removed from the pallet P at the loading station 18, the workpiece is returned to a predetermined address in the automated warehouse 13.

<Effects of the Invention> As described above, in the present invention, the abnormality processing station is provided separately from the loading station, and when an abnormality in pallet inspection occurs, the pallet P is transported to the abnormality processing station. Since the processing necessary to remove the abnormality is performed, there is no need to stop the system, and the work can be performed accurately at a fixed position where it is easy to perform abnormality processing.

[Brief explanation of the drawing]

FIG. 1 shows the overall configuration of the present invention, FIGS. 2 to 4 show embodiments of the present invention, FIG. Figure and 4th
The figure is a diagram showing a flowchart. MT, 1 "MT n --- Machine tool, NC1~NC
n... Numerical control device, 10... Conveyance line, 11.
...Transportation truck, 12...Pallet inspection device, 18...
Loading station, 20... Abnormality processing station, 21... Operation panel, 25... Central processing unit, 28... Transfer control device, 31... Abnormality detection device. Patent applicant Toyota Machinery Co., Ltd.

Claims (3)

[Claims] (1) A plurality of machine tools are arranged along the conveyance path, and the conveyance of the pallet from the loading station to the machine tool and between each machine tool is performed by the conveyance device on the conveyance path. In canidistem,
a pallet inspection device that reads a code given to a pallet; an abnormality detection device that generates an abnormality signal when a pallet number read by the pallet inspection device differs from a commanded pallet number; and the loading station. an abnormality processing station provided separately from the above for processing abnormalities on pallets in which abnormality has been detected;
A pallet in a Kanji system comprising a 1J31 feed control device that controls the first general feed device so as not to carry a pallet in which an abnormality has been detected based on an abnormality signal issued from the abnormality detection device to the abnormality processing station. Abnormality processing device. (2) The pallet abnormality processing apparatus in the processing system according to claim 1, wherein the abnormality processing station is equipped with a display device that displays the abnormality and an operation panel that gives an operation command after the abnormality processing. (3) The pallet abnormality processing apparatus according to claim 1, wherein the pallet inspection device is provided on the conveyance device.