JPH0519828A - Schedule operation method for machining line - Google Patents

Abstract

PURPOSE:To provide the schedule operation method for the machining line which carries on machining without rewriting a schedule program even in case of no material and enables nighttime complete unmanned operation even if a material preparation state is not complete. CONSTITUTION:When there is no material, it is confirmed that no material is left on other shelves and then a job corresponding to a schedule currently in process is skipped 404. The skipping state is recorded 405 and reflected on subsequent machining. When materials is left on other shelves, the materials on the shelves are naturally used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a schedule operation method for a processing line equipped with an automatic warehouse.

[0002]

2. Description of the Related Art Conventionally, in a processing line equipped with an automatic warehouse, for example, when there is no material on a shelf at a certain stage, the shelf having the material to be supplied is designated and the restart button is pressed to continue the processing. It was If there is no material to be supplied on any of the shelves, the schedule program is rewritten, the start button is pressed, and processing is started from the next job.

[0003]

However, the conventional measures against the signal of no material as described above require reediting the schedule program especially when the predetermined material is not present on any shelf. Took a lot of time. In addition, the editing of this schedule program is to delete the job in which there is no material on the original schedule program, but it is not possible to leave the state of job deletion and it causes problems in later work etc. There was a point.

Further, since the processing is temporarily suspended in the absence of the material, there is a problem that the fully unmanned operation at night cannot be performed unless the material preparation is completed in advance so that the material-less condition does not occur. It was

Therefore, according to the present invention, when a material-less condition occurs, machining can be continued without rewriting the schedule program, and even if the material preparation situation is not perfect, night-time unattended operation is also possible. It is an object of the present invention to provide a schedule operation method of a processing line capable of performing the above.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention constitutes a schedule operation method of a processing line as set forth in the claims.

[0007]

In the schedule operation method of the processing line of the present invention, in the above configuration, when a signal indicating no material is generated, it is confirmed that there is no designated material in any of the plurality of shelves, and then the material is not present. The execution of the NC program corresponding to is automatically skipped, the next NC program is executed, and the skipped state is automatically recorded.

Therefore, even if there is no material in the middle of the execution of the schedule program, the machining can be continued without rewriting the schedule program, and even if the material preparation situation is not perfect, nighttime unattended operation is possible. Can be

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the processing line to which the present invention is applied is
It is assumed to be a processing cell of a punch press machine. This cell is
An automatic warehouse equipped with multi-row and multi-tier material shelves, a traverser for loading and unloading materials into and from the automatic warehouse, a pallet transfer vehicle that is moved between the traverser and the single-sheet picking device, and the single-sheet picking device. A punch press machine (turret punch press) that receives each material (workpiece) from the machine and performs press working, and a CNC that controls the punch press machine
Each device control device controls the device and other devices, and a communication unit connected to the CNC device and other control devices. A main controller that edits a schedule program and commands the CNC device to execute a scheduled operation is connected to the communication means. Also,
An automatic programming device for generating each NC program is connected to the main controller.

The CNC device includes an MMC (Man Machine Controller), a CNC unit, a sequencer, and a PMC (Programmable Machine Controller) interposed between the sequencer and the MMC. MMC is
A shelf management unit that manages what kind of material is stored in which stage and a schedule data management unit that manages the data necessary for scheduled operation are provided. FIG. 1 is an explanatory diagram showing an example of data managed by the shelf management unit of the MMC. FIG. 2 is an explanatory diagram showing an example of data necessary for schedule execution similarly managed by the schedule data management unit of the MMC. The CNC unit executes the actual schedule operation and controls the operation of the punch press machine. An example of the schedule program is shown in FIG. The sequencer
Shelf control is performed according to the auxiliary (M) code on the NC program. Further, the sequencer inputs a signal indicating that the material-free condition has occurred, and requests the PMC or CNC unit to perform a predetermined process. The wood-free condition is generated by operating a manual button or automatically.

FIG. 4 is a flow chart showing a processing method of the CNC device when a material-less state occurs in the processing cell. When the signal of no material is input in step 401, it is determined in step 402 whether the same material is present in another shelf. If there is, an instruction to use the shelf is issued in step 403, and if there is not, the process proceeds to step 404 to skip the job, then in step 405, the skip state is recorded, and a history is recorded and the process returns. The signal of no material can be automatically generated regardless of button operation. Whether it is automatic or manual may be operated by operating the changeover switch. It may also be specified on the program.

Specifically, in the schedule shown in FIG. 3, when job No. 1 runs out of material and the operator presses the material out button, the following processes 1 to 3 are executed.

The sequencer notifies the PMC of the absence of material. The PMC notifies the MMC of the occurrence of lack of material. Since the material XYZ of No. 1 is not in the other shelves, this job is ignored and the next job (N
o. 2) is selected. 2 set MMC requests line restart to PMC PMC requests line restart to sequencer Further, for example, job No. of FIG. If there is no stock in job No. 2, the job No. Since the material ABC of No. 2 has also been searched for on the shelves 1 other than the shelves 4, the instruction to use the shelves 1 (multiple loading process) is given, and the shelves 1 are set in the schedule in the processing of the CNC section.

As described above, when the stock-out condition occurs, it is confirmed that the same stock does not exist in the other shelves, and then the job is skipped and recorded. Therefore, in the manned operation in the daytime, the operator may press the no-material button to continue the processing when the no-material state occurs. At this time, the skipped state of the job is recorded and appropriately notified to the administrator located at the main controller position, so that the skipped job is adjusted in the subsequent processing.

In the completely unmanned operation at night, the material-free state is automatically determined, and the job is skipped by performing the appropriate multi-loading processing. Therefore, the processing can be continued without stopping, and the skipped status is It is checked by the operator later and adjusted in the subsequent processing. In other words, in the past, when a stockless condition occurred, the processing was interrupted in a completely unattended operation, so it had to be completed with the material status stored in the automated warehouse, but in this example, the job is skipped when there is no material available. As it can be done, the automated warehouse does not necessarily have to be complete.

The present invention is not limited to the above embodiments, but can be carried out in appropriate modes by making appropriate design changes.

[0018]

As described above, the present invention is the method for operating the schedule of the processing line as set forth in the claims. Therefore, when a signal indicating no material is generated, any of the plurality of shelves can be designated. After confirming that there is no material, the execution of the NC program corresponding to the absence of the material is automatically skipped, the next NC program is executed, and the skipped state is automatically recorded.

Therefore, even if there is no material during the execution of the schedule program, the machining can be continued without rewriting the schedule program, and even if the material preparation status is not perfect, nighttime unattended operation is possible. Can be

[Brief description of drawings]

FIG. 1 is an explanatory diagram of shelf management data used in an embodiment of the present invention.

FIG. 2 is an explanatory diagram of schedule management data used in the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a schedule program used in the embodiment.

FIG. 4 is a flowchart of a material-free process according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a data flow between constituent members of a CNC device.

Claims (1)

Claim: What is claimed is: 1. An automatic warehouse having a plurality of material shelves, a material transfer means for transferring materials required by a processing machine from the material shelves, and materials necessary for executing each NC program. A schedule operation device for sequentially executing a plurality of NC programs defined by a schedule program while retrieving from the material shelf via the material transfer means. When a material-less signal indicating that there is no material is generated, it is automatically confirmed that there is no designated material in any of the plurality of shelves, and then the NC program corresponding to the absence of the material is automatically executed. Skip to the next N
A scheduled operation method for a machining line, which is characterized by executing a C program and automatically recording a skipped state.