JPH05200656A - Operation control method for finishing machine in working production system - Google Patents

Abstract

PURPOSE:To make a work schedule consisting of plural pieces of work breakdown be quickly performed to the last with certainty in succession by allocating the untreated work breakdown to another normal transfer machine surely in the case where one transfer machine has gone wrong. CONSTITUTION:After the final work of a transfer machine is ended, whether there is another transfer machine in operation within the group or not is judged by a step S16, and when YES is the case, whether there are more than two transfer machines machinable other than this operation finished transfer machine or not is judged by a step S17, and when there are more than two units of the operating transfer machine in addition, an operating state of the operation finished transfer machine is released, and when there is only one transfer machine in operation there, the operation finishing transfer machine is kept in the operating state intact up to the operation termination of a work schedule without interrupting its power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation of a processing machine in a processing production system including a plurality of processing machines and work transfer devices, and more particularly to a method for controlling a plurality of processing machines having complementary processing capabilities. The present invention relates to an operation control method for a processing machine, which is managed as a group and executes a work schedule including a plurality of work contents.

[0002]

2. Description of the Related Art As a method of controlling the operation of a processing machine of this type of processing and production system, as disclosed in Japanese Patent Laid-Open No. 63-22252, a plurality of processing machines are operated for each processing machine by a work schedule operating device. The machining operation is controlled based on a work schedule consisting of a plurality of preset work contents, and a failure signal indicating that one of the plurality of processing machines is in a failure state is output from the control device on the processing machine side. When input to the work schedule operating device, regarding the subsequent processing, the normal processing machine adjacent to the failed processing machine has its processing program and the unprocessed processing originally assigned to the failed processing machine. There has been a method of executing a processing program of work contents based on a backup processing schedule prepared in advance.

[0003]

However, in the above-mentioned conventional example, when the processing machine fails during execution of the work schedule,
The assigned work can be performed, but if the probability of failure during operation is high compared to ordinary machine tools, such as laser processing production systems, the unprocessed state left by the failed machine will remain. There is a problem that even if an adjacent laser processing machine is made to execute the work content of (1), if the adjacent processing machine is out of order, it cannot be backed up.

Further, in the laser processing machine, it takes a long time to bring the laser oscillating device and the assist gas generating device into the operating state, and the energy cost is high when the operating state is maintained after the processing is completed. Therefore, after finishing the processing of the final work content assigned to each processing machine,
The power of the finishing machine is automatically shut off. For this reason, when the adjacent laser processing machine has failed and cannot be assigned to the unprocessed work contents left by the failed laser processing machine, if all other normal laser processing machines are in the power-off state. Then, there is a problem that it cannot be assigned to another laser beam machine to continue the work. Although it is possible to execute the unprocessed work contents after turning on the power of the laser processing machine again, there is a problem that the work time is significantly lengthened and the production cost is significantly increased. It was

Further, in the above conventional operation control method,
Since it is necessary to set up multiple processing programs for backup in advance for each processing machine assuming that the processing machine fails, the work is troublesome and the backup for each processing machine is required. There is also a problem that it becomes necessary to use a large-capacity control device capable of storing the above program, resulting in cost increase.

Therefore, recently, even when assigning a large number of work contents of different types, the applicant of the present application can easily set the schedule of the entire processing work without considering the load status of each processing machine. It is possible to reduce the cost of the control device by eliminating the need for a backup program and to reduce costs. We proposed a method for controlling the operation of a processing machine in a processing production system that allows other processing machines to perform the unprocessed work contents when the processing cannot be continued.

However, even in the operation control method of this processing machine, when each processing machine automatically shuts off the power when the work is completed, as described above, when the last remaining processing machine fails, Unprocessed work left by the processing machine cannot be assigned to another laser processing machine to continue the work, or it is necessary to turn on the power again to start up, and the working time is significantly lengthened. However, there remains a problem that productivity cannot be improved and cost cannot be reduced.

The present invention has been made in order to solve the problems existing in the above-mentioned prior art, and its purpose is to transfer the unprocessed work contents to another normal processing machine when the processing machine fails. An object of the present invention is to provide an operation control method for a processing machine in a processing and production system, which is capable of surely allocating and executing a work schedule including a plurality of work contents reliably and continuously until the end.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to carry in a work between a plurality of processing machines having complementary processing capabilities and a work stocker and each of the processing machines. In a processing and production system including a work transfer device configured to carry out and a schedule operation device that causes the plurality of processing machines to perform a work schedule composed of a plurality of work contents, After the completion of the work content of 1., it is determined whether or not there are two or more processing machines in operation other than the work-finished processing machine, and if there are two or more processing machines in operation, When the operating state of the work finished processing machine is released and only one other working machine is operating, the work finished processing machine is kept in the operating state until the work in the work schedule is finished.

[0010]

[Operation] In the present invention, after the finishing operation of the final work content of each processing machine is finished, when there is only one normal working machine in addition to the final work finished processing machine, The final work end processing machine is kept in an operating state until the work of the work schedule is completed. Therefore, it is possible to allocate the unprocessed work contents left by the broken processing machine to the normal processing machine that is waiting in the operating state for backup, and all the work contents of the work schedule can be complemented reliably and continuously. Executed.

Further, since only the minimum necessary processing machine is kept in operation for backup after the final work,
Even when the operation cost is high like a laser processing machine, the energy cost can be suppressed to the minimum.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a laser processing system using a plurality of laser processing machines will be described below with reference to the drawings.

As shown in the plane of FIG. 9, the three-dimensional stocker 1
A movable lifter 2 is mounted on the front surface of the stocker 1, and a work supporting pallet (not shown) housed in the stocker 1 can be loaded into and unloaded from the stocker. A plurality of laser beam machines A1 to A3 and B1 to B3 are provided in front of the three-dimensional stocker 1.
(See FIG. 1), C1 to C3 (not shown) are installed in series at predetermined intervals. These processing machines A1 to A3
B1 to B3 and C1 to C3 are grouped by processing machines having the same processing capability and capable of complementary work. In this embodiment, three laser processing machines A1 to A3 are grouped as A. Different from the processing capacities of the laser processing machines A1 to A3, and three laser processing machines B1 to B3 having the same processing capacity as each other are defined as a group B, and different from the processing capacities of the laser processing machines A1 to A3 and B1 to B3. And three laser processing machines C1 to C having the same processing capability as each other
3 is group C.

Further, each processing machine A1 to A3, B1 to B3, C
1 to C3 and the stocker 1 are provided with a transfer station 3 for transporting pallets, a material station 4 and a temporary placement station 5, and the material station 4 and the processing machines A1 to A3 and B1 to A loading device 6 for loading and unloading pallets is provided between B3 and C1 to C3. At the left end of the three-dimensional stocker 1, there is provided a loading / unloading station 7 for loading / unloading pallets to / from the work stocker 1 by the moving lifter 2.

As shown in FIG. 10, each of the processing machines A1 to A1
To A3, B1 to B3, and C1 to C3, a central control device 8 that constitutes a schedule operation device P for centrally managing the machining operations for each group is connected.
Group A will be described here, but groups B and C
Has the same configuration. Each processing machine A1-A
First to third control devices 9 to 9 respectively provided corresponding to
11 and the central controller 8 are connected by a lead wire. These control devices 9 to 11 are processing machines A1 to A, respectively.
In addition to individually controlling the machining operation of No. 3, when the machine breaks down or the work being machined is abnormal and the machining is interrupted, it is detected and the central control unit 8 is operated.
It has a function to output a stop signal. Further, the central control unit 8 is provided with an arithmetic processing circuit CPU 12 for controlling various discriminating operations and processing operations, a read only memory ROM 13 and a random access memory RAM 14 as storage means, and various information as described later. A hard disk 15 for storing is provided.
Further, the central controller 8 has a display (CRT) 1
6 is connected, and an operation panel 17 is connected to the CRT 16. Then, by the input key of the panel 17,
The work schedules, work contents, processing conditions, etc. of groups A to C described later can be set in advance. Various information from CAD CAD and CAM 18 can be inputted to the central control unit 8.

Next, the function of the above-mentioned central control unit 8 will be described with reference to FIG. ROM13, RAM1
4. The hard disk 15 has a schedule file 21 for storing the work schedule of each group A to C, a work content file 22 for similarly storing the work content of each group, output at laser processing, speed or A processing condition file 23 for storing processing conditions such as assist gas pressure, an NC (numerical control) program for causing each laser processing machine A1 to A3, B1 to B3, C1 to C3 to execute a single work name. NC to remember
A program file 24 is provided. Also, the R
The OM 13, the RAM 14, and the hard disk 15 are provided with the stock / occupancy information table 25 for storing the stock / occupancy information in the stocker 1 and the conveyance controller 27 for controlling the movement lifter 2 so as to supply the conveyance information. A transport information table 26 is provided.

Further, the RAM 14 and the hard disk 15
For example, in group A, a table 31A for storing schedule progress information of group A and a work content information table 32A of group A are provided. Then, the work content information (work name, material information, and NC program name) is provided from the table 32A to the table 31A. Further, in the schedule progress information table 31A, each of the processing machines A1 to A3 is
Corresponding to the control information table 3 for each of the processing machines A1 to A3
3A, 34A and 35A are connected. Similarly, in the groups B and C, the schedule progress information tables 31B and 31C include the processing machines B1 to B3 and C1 to C, respectively.
3 corresponding to the control information table 33B, 3 for each processing machine
4B, 35B, 33C, 34C and 35C are connected.

Next, the schedule progress information table 31A of the group A will be described with reference to FIG. 6 on behalf of the groups. Schedule A is registered as a schedule name in the progress information table 31A, and a status flag of the schedule A (for example, being executed or completed) is recorded. Further, “NO.1 to NO.4 ...” is recorded in the work order area, and, for example, “work 1, 3 to 5” is preset as the work name in the work name area corresponding to these work orders. There is. or,
The planned number is preset in the planned processing number area, for example, "3, 3, 4, 2." In the work status area, the machining work is "completed, in progress, interrupted, unexecuted".
The work status of the etc. is stored. Further, the number of machining of the work is stored in the machining completion number area corresponding to each work order, and any one of “A1 to A3” is stored as the machining machine number in the target machining machine area, for example. ..

In this embodiment, 3 in group A
Using the processing machines A1 to A3, the work sequence area,
As shown in the work name area and the planned number area, a schedule A (hereinafter referred to as a group schedule A) for the group A as a whole is set so as to execute at least four kinds of work names and a planned number of machining works. In addition, the schedule of each of the processing machines A1 to A3 is not set. Similarly, group schedules B and C are set for the other groups B and C, respectively.

Next, the work content information tables 32A to 32C set for the respective groups A to C will be described with reference to FIG. This work content information table 32A is provided with the same areas as the work order area and the work name area described above, and the material information of the work, for example, "SS1, SS3 to SS5" is stored in correspondence with these work names. There is a material information area for Further, the NC program name corresponding to the work name, for example, "NO.1"
There is an NC program name area for storing "00001". Then, all the work content information necessary for the group schedule A is preset in each area to. Similarly, work content information required for the group schedules B and C is set in advance in the work content information tables 32B and 32C, respectively.

Next, the control information tables 33A to 35A of the respective processing machines A1 to A3 in the group A will be described with reference to FIG. The table 33A is provided with a work designation area, and when the processing operation of the processing machine A1 is stopped and a "work request" is issued by the processing machine A1, that area is recorded. Further, when the processing operation of the processing machine A1 is being executed, it is recorded which order among the above-mentioned “NO. 1 to NO. When A1 is out of order, the state of "inoperable" is recorded. Further, a work loading / unloading request area is also provided in the table 33A, and a "loading request", a "loading request", or a "no request" for the work is recorded therein. Similarly, the control information tables 34A and 35A are recorded with various information of the respective processing machines A2 and A3. Furthermore, the processing machines B1 to B3 in the groups B and C
C1 to C3 control information tables 34B, 34C, 35
Similarly, in B and 35C, a work designation area and a work loading / unloading request area are provided.

Next, the operation of the laser processing system configured as described above will be described. Since the operations of group schedules A, B, and C are performed in the same manner,
Here, the operation of only the group schedule A will be described.

In the stopped state of the processing system, as described above, the group schedule A is set in advance in each area of the work order, work name and scheduled number of the group schedule progress information table 31A of FIG. The state, the number of completions, and each area of the target processing machine are in the initial state in which they are all cleared. Further, as shown in the work content information table 32A of FIG. 7, information necessary for the group schedule A is preset in the material information area and the NC program name area. Further, the work designation area and the loading / unloading request area of the processing machine control information tables 33A to 35A are all cleared.

When the machining operation of the machining system is started in the above-mentioned initial state, all the three machining machines A1 to A3 in the group A are in a no-load state, and therefore the respective machining machines A1 to A3. "Work request" is output from the control devices 9 to 11 of the group control progress device 8 to the central control device 8, and, for example, the processing machine A1 is initially the group schedule progress information table 3 of FIG.
The first machining operation of the "work 1" in the work name area "NO. 1" in the work order area 1A is performed. Similarly, with the processing machines A2 and A3, "N" in the work sequence area
O. The first machining operations for "work 3" and "work 4" in the work name areas "2" and "NO. 3" are performed in parallel.

Therefore, first, the details of the first machining operation of the "work 1" in the work name area of the machining machine A1 will be described with reference to the flowchart of FIG. In step S1 in FIG. 2, it is determined by the first control device 9 whether or not work is possible, and if the processing device A1 is YES in a normal state, the processing device A1 outputs an operation signal from the control device 9. The work designation area of the control information table 33A is rewritten from “clear” to “work request”. Then, in step S3, whether or not to accept the "work request" from the processing machine A1 side by the central controller 8 is determined based on the information such as the inventory / occupancy information table 25 and the transport information table 26, and the initial stage. Then, since all group schedules have not been processed, YES is determined, and at this stage, the work name “work 1” of “NO1” in the work order area of the schedule progress information table 31A is assigned. The material of this work name "work 1" is "SS 1" as is clear from the work content information table 32A shown in FIG.
1 ”. Then, the central controller 8 outputs to the transport controller 27 a "loading request" of the work required for the processing machine A1. (Step S4) As a result, the transport controller 27 is operated and the work specified by the stocker 1 is carried out by the moving lifter 2 together with the pallet.
It is supplied to the processing machine A1.

After the "workpiece carry-in request" in step S4, it is judged in step S6 whether or not "workpiece carry-in is completed". If YES, it is stored in the work content information table 32A shown in FIG. 7 in step S7. NC that matches the "work name" specified from the information in correspondence with the "work request"
The program is selected from the NC program name area and loaded into the control device 9 of the processing machine A1. In this case, since the "work name" is "work 1", "00001" in the program name area is selected. Further, in step S7, the processing condition suitable for the work name "work 1" is called from the processing condition file 23 and loaded into the control device 9 of the processing machine A1.

Thereafter, in step S8, a machining instruction is output from the central control unit 8 to the machining machine A1, and the machining machine A is processed based on the selected NC program and machining conditions.
The control device 9 of No. 1 is operated to perform the working operation on the work. Then, in step S9, the control information table 3
Based on the information of the work designated area of 3A, the processing machine A1
The central control unit 8 judges whether or not the normal machining operation of the work by the above is completed, and if YES, the step S
At 10, the completion number is added to the completion number area of the group schedule progress information table 31A shown in FIG. 6 and "1" is stored. Further, after that, step S11
Then, based on the information of the carry-in / carry-out request area of the control information table 33A shown in FIG. 8, the central controller 8 issues a "carry-out request" for the work to be processed, and whether or not the carry-out of the work is completed in step S12. Similarly, the determination is made based on the information of the loading / unloading request area, and if YES, in step S13, the group schedule progress information table 31A
It is determined whether or not the number of completions of the work name “work 1” in the work order area within the number has reached the planned number “3”, and in the case of the first time, it is determined as NO and the process proceeds to step S4 described above. .. If it is determined that the number of completions of the work name “work 1” has reached the planned number “3”, the process returns to the “operation possible?” Determination operation in step S1.

On the other hand, if it is determined in step S9 that the normal machining is not completed, the controller 9 issues an "unloading request" of the unmachined work as abnormal (interruption) completion in step S14. Then, in step S15, the central controller 8 determines whether or not the unloading of the unprocessed work is completed. If YES is determined, the work of the processing machine A1 is interrupted in step S16, and this is the schedule progress information of FIG. It is recorded as "interruption completed" in the work status area of the table 31A, and then the process returns to step S1.

If, for example, the processing machine A1 is out of order and the alarm buzzer is activated and the work cannot be performed, NO is determined in step S1 and then step S1.
In step 7, it is determined whether or not there is an instruction to turn off the power of the processing machine A1. If YES, the power of the processing machine A1 is turned off in step S18, and the operation of the processing machine ends. Also, step S
If there is no instruction to turn off the power in step 17, step S1
Move to.

When the "work request" is not accepted in step S3, it is determined in step S5 whether or not the "status flag" of the schedule progress information table 31A is "complete". In step S18, the power of the processing machine A1 is turned off, and the operation of the processing machine ends. If NO in step S5, it is determined in step S19 whether or not there is an instruction to turn off the power of the processing machine A1, and if YES, the process proceeds to step S18 to turn off the power of the processing machine A1. Then, the operation of the processing machine ends.
If there is no power-off instruction in step S19, the unprocessed “work name” of the table 31A shown in FIG.
However, until the central control unit 8 allocates the work designated area of the control information table 33A of the processing machine A1 shown in FIG. When the "work name" is given, the process proceeds to step S3 for determining whether to accept the "work request".

When the processing machine A1 is broken down and is set up after repaired by the worker, the work can be performed by the judgment operation of step S1. However, if it is not set up, the work is impossible, and in this state. For example, after a lapse of a certain time or when the operator determines that the repair of the processing machine is difficult, a power-off instruction is issued and the processing machine A1 is stopped. When only the work being processed has an abnormality and the processing is interrupted, it is automatically determined in step S1 that the work is possible because the processing machine A1 is normal after the work is unloaded.

Although the machining operation described above is for the machining machine A1, the machining machines A2 and A3 are also the machining machines A1.
Similar to the machining operations of, and they are performed sequentially in parallel with each other.

Next, the processing operation by the central controller 8 of the group schedule A of the three processing machines A1 to A3 will be described with reference to the flowchart of FIG. In step S1 of FIG. 3, the schedule progress information table 3 of FIG.
The central controller 8 determines whether or not the group schedule A is “completed” by the “status flag” of 1A,
If YES, the operation of the group schedule A ends. In the case of NO, it is determined in step S2 whether or not there is a "work request" from any of the machine tools A1 to A3 based on the designation information of the work designation area of the machine control information tables 33A to 35A. Is step S
In step 3, whether or not there is a "loading request" for the work from any of the processing machines A1 to A3 is similarly determined by the respective request information in the loading / unloading request area. If NO, the processing is performed from any of the processing machines in step S4. Whether or not there is a "removal request" is determined by each request information in the in / out request area,
If NO, the process returns to step S1.

On the other hand, in step S2, one of the processing machines A
When there is a "work request" from 1 to A3, the operation for determining the "work content" is performed for the processing machine (for example, the processing machine A1) for which the work request is made in step S5, and then the process returns to step S1 .. The operation of step S5 will be described later in detail based on the flowchart shown in FIG.

If there is a "loading request" for a work from any of the processing machines in step S3, the work is carried in to the processing-requested processing machine in step S6, and then the process returns to step S1. Further, when there is a "unloading request" of the work from any of the processing machines in step S4, the work is unloaded from the processing machine that outputs the unloading request in step S7, and then the process returns to step S1.

Next, the operation of determining the "work content" of the processing machine that has output the "work request" will be described with reference to the flowchart of FIG. In step S8 of FIG. 4, it is determined whether or not there is "unexecuted work" based on the rewriting information in the areas of the progress information table 31 of the group schedule A.
In the case of YES, the corresponding "material information" is determined from the work content information table 32A based on the work name. (Step S9) Next, in step S10, it is determined based on the information in the inventory / attendance information table 25 whether or not to stock the work. If NO, the process returns to step S8 and YES.
In the case of, processing machine control information table 3 in step S11
In the work designated area of 3A, the work order NO, for example "N
O. 1 "is set, and then the process returns to step S1 in FIG.

On the other hand, if NO in step S8, the "interruption completion work", that is, the work is interrupted in step S16 of FIG. 2 described above, is recorded in the schedule progress information table 31A of FIG. Based on the information, it is determined whether or not there is a work of interruption (abnormality) completion (step S12). If YES, the corresponding "material information" is found from the work content information table 32A based on the "work name". It is determined. (Step S13) Further, in step S14, it is determined whether or not the work is stocked. If NO, the process returns to step S12, and if YES, the work order is set in the work designation area of the processing machine information table 33A in step S15. NO "for example, NO. 1" is set, and then the process proceeds to step S1 in FIG.

Further, when it is determined in step S12 that there is no "interruption completion work", the operation control operation of the main part of the present invention is performed as follows based on the flowchart shown in FIG.

In step S16 of FIG. 5, it is judged by the central control unit 8 whether or not there is another operating machine in the group A, and if YES, another 2 in the group A in step S17. It is determined whether or not there are processing machines capable of processing more than one machine. If YES, a power-off instruction is given to the processing machine with the "work request" in step S18, and then the process proceeds to step S1 in FIG. To do. Also, step S1
If NO is determined in step 7, the process proceeds to step S1 while the power source of the processing machine for which "work request" is present is held.

Further, when it is determined in step S16 that there is no other operating machine in the group A, the status flag of the group schedule progress information table 31A shown in FIG. 6 is "executed" in step S19. During"
Then, the central controller 8 outputs a power-off instruction for all the processing machines in the group A in step S20, and the processing operation of all the work contents of the group schedule A is completed. After the shift, all the machining operations of the group schedule A are completed.

Next, referring to FIG. 6, group schedule A
Will be further described, the state in which the scheduled number 3 of the work name “work 1” by the processing machine A1 is “completed”, and the second sheet of the “work 3” is processed by the processing machine A2 is “in execution”.
Further, the number of completions is “1” at the planned number of 4 by the processing machine A3, and “interruption completion” is indicated. Further, since the work name “work 5” of the work sequence 4 is in the “unexecuted” state, “N” is given before the work sequence “NO. 3” of “interruption completed”.
O. When "A1" is designated as the target processing machine of "4" and processing of one work is completed by the processing machine A1, "1" is recorded in the completion number area. After that, when there are no more unexecuted work names, the processing of three unprocessed (4-1 = 3) works with the interrupted work name “work 4” is performed by another processing machine, that is, the processing requested. Assigned to machines A1 and A2. If the target processing machine is "A1 or A2" in the work name "work 4" of "NO. 3", then "A1" or "A2" is recorded.

In the embodiment of the present invention, for example, when a "work request" is issued from a predetermined processing machine A1 in the same group A, the unexecuted work contents are assigned to the processing machine A1 and processed. You can take action. Further, in this embodiment, when the work order, the work name, and the planned number are set in advance, they can be set without considering the load status of the processing machines A1 to A3, so that the setting work of the schedule is simple and quick. In addition, it is possible to reduce the capacity of the apparatus and reduce the cost by eliminating the need for the NC program for backup.

In particular, in the above-described embodiment, when the power to the processing machine which has finished the processing of the final work is shut off and the operation is stopped, the other processing in the same group can be normally processed. Judging whether there are two or more machines, 2
When there are more than one machine, the power of the processing machine is shut off, and when there is one machine, the power of the machine that finishes the final work is kept, so the last one machine that performs the final work fails. In this case, the normal processing machine that is waiting for backup can execute the unprocessed work content reliably and quickly, and even if the processing machine fails, all the work content of the group schedule is finalized. Can be executed reliably and quickly.

Next, another embodiment of the present invention will be described.
In this embodiment, when a plurality of works are placed on one pallet to carry in / out, between step S10 of adding the number of machining completions and step S11 of requesting work unloading in the flowchart of FIG. First, it is determined whether or not the work is completed, or whether or not there is a work. Next, in step S11, a pallet unloading request is issued instead of the work. The operation before and after this is performed similarly to the operation shown in FIG.

Further, in the above embodiment, the central control unit 8
RAM 14 and hard disk 15 of each group A ~
Each work schedule of C is set, but by connecting a determination circuit (not shown) for determining whether or not there is an error in the initially set schedule to the central control unit 8, the actual processing is performed. It is also possible to improve the work efficiency by eliminating the error detection after the work is started.

The present invention is not limited to the configuration of each of the above-described embodiments. For example, the present invention is embodied in a production processing system that requires a backup processing program of the conventional example, and various types other than a laser processing machine. The present invention can be embodied by arbitrarily changing the configuration of each part without departing from the spirit of the present invention, such as embodying it in the processing system.

[0047]

As described above, according to the present invention, when a processing machine fails, the unprocessed work contents are surely assigned to another normal processing machine and the work schedule is complementarily executed. Even if the last one of the processing machines fails, there is one processing machine that is always on standby in the operating state, so a work schedule consisting of multiple work contents can be ensured to the end. It can be continued and executed quickly. Also, since only the minimum necessary processing machine is kept in operation for backup after the final work,
Even when the operating cost is high like a laser processing machine, the energy cost can be suppressed to the minimum, and the excellent effects of improving productivity and reducing costs can be achieved.

[Brief description of drawings]

FIG. 1 is a control circuit diagram showing an embodiment in which the present invention is embodied in a laser processing system.

FIG. 2 is a flowchart showing a processing operation for each processing machine.

FIG. 3 is a flowchart showing a schedule operation for each group.

FIG. 4 is a flowchart showing an operation of determining the work content for the processing machine when a work request is issued from the processing machine.

FIG. 5 is a flowchart showing the control operation of the main part of the present invention.

FIG. 6 is an explanatory diagram showing a schedule progress information table.

FIG. 7 is an explanatory diagram of a work content information table.

FIG. 8 is an explanatory diagram showing a control information table of each processing machine.

FIG. 9 is a schematic plan view of the processing system.

FIG. 10 is a block circuit diagram showing a control device of the processing system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 three-dimensional stocker, 2 moving lifters, 8 central control units, 9-11 first to third control units, 12 arithmetic processing circuit CPU, 13 read only memory ROM as storage means, 14 random access memory RAM,
21 schedule file, 22 work content file, 23 processing condition file, 24 inventory / occupancy information table, 25 NC program file, 26 transport information table, 31 schedule progress information table, 3
2 work content information table, 33 to 35 first to third processing machine control information tables, A to C groups, A1 to A
3 processing machines, P schedule operation device.

Claims (1)

[Claims] 1. A plurality of processing machines having complementary processing capabilities, a work transfer device for carrying in and out a work between a work stocker and each of the processing machines, and the plurality of processing machines. In a processing production system including a schedule operation device for performing a work schedule composed of a plurality of work contents, after finishing the final work contents of each of the processing machines,
It is determined whether or not there are two or more processing machines in operation other than this work-finished processing machine. If there is another two or more processing machines in operation, the operation status of the work-finished processing machines is determined. When there is only one processing machine that is released and is in operation, the operation of the processing machine in the processing production system is characterized in that the operation-finished processing machine is held in the operating state until the end of the work of the work schedule. Control method.