JPH11249721A - Method and device for working dnc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily start reworking from the optimum stage when working is interrupted. SOLUTION: When an interruption occurs in the case of working a product from a sheet material to which nesting processing is performed, the execution position of an NC program at the time of interruption occurrence is stored in a working schedule data base 19, working conditions or working information such as a used metal die or coordinate at such a time is stored in a working information data base 35, and the stock state of material storage, product storage or wreck storage at the time of working interruption is stored in a stock information data base 37. When starting working again, an NC working machine 21 restarts real working from the state of working at the time of interruption stored in the working information data base 35 and the stock state at the time of interruption stored in the stock information data base 37 while passing real working until the execution position at the time of interruption stored in the working schedule data base 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for a CNC machining, and more particularly to a method and an apparatus for a CNC machining for resuming machining after interruption of a nested machining during a DNC operation. It is.

[0002]

2. Description of the Related Art Referring to FIG. 24, a conventional DNC (dir
In the operation (ect numerical control), the upper controller 101 cuts out the parts P1 to PN from the plate material (# 1 to #N) W by a nesting process or the like by using an NC program (S $ 1
~ S♯N) 103 and the lower processing machine 109 for performing the schedule DNC operation 107 based on the schedule information 105 indicating how many times the NC program 103 is to be processed.
The machining process 113 is performed by instructing the NC device 111 to perform processing.

[0003]

However, in such a conventional technique, when machining is interrupted for some reason in the middle of an NC program (for example, # 1 in FIG. 23) being machined based on a certain schedule. Since there is no mechanism to memorize where and what processing conditions are being used during the CNC operation and to notify the host controller, it is necessary to start the same DNC processing again from the beginning. There is a problem of lowering. Alternatively, when the work at the time of interruption is discarded as defective, there is a problem that not only time but also the work is wasted.

Further, when a nesting-processed sheet material (parts P1 to Pm are cut out) is processed, the relation information between the cut-out sheet material and the part and the NC program are processed. Since there is no association, the processing results at the component level, stock information (what, where, and where) are not accurately grasped. For this reason, it is not possible to give a manufacturing instruction at the component level, and the same sheet must be reworked from the beginning, resulting in a problem that the working efficiency is reduced and the work is wasted.

Further, the nesting process is performed again according to the number of unprocessed parts by the automatic program device, and
The program has to be rewritten, which is very complicated.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the above-mentioned conventional technology, and it is possible to quickly start rework from an optimal stage when machining is interrupted.
An NC processing method and an apparatus therefor are provided.

[0007]

In order to achieve the above-mentioned object, a DNC processing method according to the first aspect of the present invention processes a material from a material storage by a schedule operation of an NC processing machine controlled by a host controller. In the DNC machining method where products are accumulated in the product storage area and the remaining material is returned to the remaining material storage area, when processing is interrupted during scheduled operation of the nested NC program, Of the execution program in the NC program, machining information and materials, products,
It is characterized in that information on inventory management of remaining materials and the like is stored, and when machining is resumed, the actual machining is resumed after passing the execution program position at the time of the interruption and performing an automatic restoration process.

Therefore, when an interruption occurs when processing a product from a nested sheet material, the execution position and processing information of the NC program at the time of occurrence of the interruption and the stock status of the material storage, product storage, and remaining material storage are changed. When the stored machining is resumed, the stored NC program is passed without performing actual machining to the execution position at the time of interruption, and the same as that at the time of interruption based on the stored machining information and stock status. Actual machining is restarted from the state.

According to a second aspect of the present invention, there is provided a DNC processing apparatus.
According to a schedule operation of an NC processing machine controlled by a host controller, a CNC processing apparatus processes a material from a material storage, accumulates products in the product storage, and returns the remaining material to the remaining material storage when remaining material is generated. A machining schedule database that stores the execution program position in the NC program when machining is interrupted when machining is interrupted during the scheduled operation of the nested NC program, and stores various machining information when the machining interrupt occurs. A processing information database, and an inventory information database that stores inventory of a product storage area, a material storage area, and a remaining material storage area when the processing interruption occurs,
When the interrupted machining is resumed, the NC machining machine passes without performing actual machining to the NC program execution position at the time of occurrence of the interruption stored in the machining schedule database transferred from the upper controller without performing the actual machining. It is characterized in that it is configured to perform actual machining thereafter from the machining conditions stored in the information database and the stock status stored in the stock information database.

Therefore, when an interruption occurs during processing of a product from a nested sheet material, the execution position of the NC program at the time of occurrence of the interruption is stored in the machining schedule database, and the machining conditions, dies, Processing information such as coordinates is stored in the processing information database, and the stock status of the material storage, product storage, and remaining material storage when the processing is interrupted is stored in the inventory information database. When resuming machining, the NC machining machine passes without performing actual machining to the execution position at the time of interruption stored in the machining schedule database, and executes the machining state at the time of interruption stored in the machining information database. Based on the stock status at the time of interruption stored in the stock information database, actual machining is restarted from the same state as at the time of interruption.

[0011]

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

FIG. 1 shows a DNC processing apparatus 1 according to the present invention. In the DNC processing apparatus 1, the host controller 3 that performs the DNC processing that directly controls a plurality of processing machines and the like includes a CPU 5 serving as a central processing unit.
Input means 7 such as a keyboard for inputting various data and output means 9 such as a CRT for displaying various data are connected.

The CPU 5 includes a schedule operation processing section 11, an NC program transfer processing section 13, a processing result attribute element update processing section 15, a stock attribute element group update processing section 17
Etc. are connected.

The schedule operation processing section 11 is connected to a processing schedule database 19 storing processing schedule attribute elements Si. Referring to FIG. 2B, the machining schedule database 19 sets how many times an NC program information element Pi, which will be described later, is machined in the specified order in the lower-order processing machine 21. The NC program information element Pi And used material Mi are stored. In addition, the storage location and completion status of the processed products are, for example, “not started”, “completed” that has been processed normally, “allocation” currently being processed, “interrupted” that has been processed, etc. Can be written.

Schedule processing is performed in the order described in the processing schedule database 19. Generally, as shown in FIG. 2A, a material is taken out from a material shelf 23 as a material storage, supplied to a processing machine 21 for processing, and a product P is stored in a product shelf 25 as a product storage. Take it out. Further, the remaining material Z by the processing is returned to the material shelf 23. Alternatively, the remaining material Z is carried out to the remaining material shelf 27 which is a remaining material storage space.

The NC program transfer processing unit 13 has N
An NC program database 29 storing C program information elements Pi is connected. Referring to FIG.
The NC program database 29 includes the processing machine 21
The NC program used when machining is performed is stored. In the NC program, when processing including a plurality of parts subjected to the nesting process, an identification auxiliary code Mxx for determining a cut of each part or product is added. The first to Nth parts correspond to the order of picking out the component of the boarding configuration attribute element Ni.

The processing result attribute element update processing unit 15 is connected to a processing result database 31 storing processing result attribute elements Ri. Referring to FIG. 4, the processing result database 31 stores information corresponding to the processing schedule attribute element Si, and the result of executing a certain schedule is registered. Processing result attribute element Ri
Stored therein are an NC program, a planned number, results indicating the number of non-defective or defective products, processing times or processing times indicating processing start time and end time, completion status, and the like.

The stock attribute element group update processing unit 17 includes the processing result database 31 and the
Boarding configuration database 33 storing i, NC processing information database 3 storing NC processing information attribute element Ci
Information is obtained from 5. Referring to FIG. 5, the board trimming configuration element Ni stored in the board trimming configuration database 33 assigns each part to a material attribute element Mi by nesting processing.
In this case, the result of the board trimming when the board is trimmed is stored. Referring to FIG. 6, the NC processing information attribute element Ci stored in the NC processing information database 35 is:
This stores various information during machining in the memory operation or the DNC operation.

The stock attribute element group update processing unit 17 is connected to a stock information database 37 storing a stock attribute element Ii as a stock attribute element, a location position database 39 storing a location position information element Li, and the like. . Referring to FIG. 7, the stock information database 3
The inventory information element Ii stored in No. 7 is for storing the inventory quantity, and stores a pallet number, a distinction between material, remaining material, and product, the inventory quantity, and a link for linking with other information. Have been. In addition, location location information Li
Indicates information on where the corresponding stock is stored, and stores a shelf address and a pallet number stored at this shelf address.

Further, the inventory attribute element group update processing section 17
Has a material database 4 storing material attribute elements Mi.
1. Product database 4 storing product attribute elements Yi
3. Remaining material database 4 storing remaining material attribute elements Zi
5 is connected.

Referring to FIG. 8, a material database 41 is shown.
Are attributed to the material specifications (material name, material, plate thickness,
X dimension, Y dimension, etc.) and data for boarding each part on a designated material (sheet) by nesting processing.

The product attribute elements Yi stored in the product database 43 can be classified as follows in order to manage products processed by a general processing machine as inventory information.

(1) When one product is processed from one material as shown in FIG. 9 (2) When the product is separated from the nested material as shown in FIG. (3), as shown in FIG. 11, when the material nested by the microjoining process is not processed and separated as it is (4), as shown in FIG. )), When the process is interrupted in the middle, in this case, the corresponding schedule is completed and the NC program information elements Pi,
The present product attribute element Yi and the remaining material attribute element Zi are generated from the processing information attribute element Ci and the board cutting configuration attribute element Ni, and are linked with the inventory attribute elements Ii and Li.

(5) As shown in FIG. 13, when the processing is interrupted in the process of (2), the unprocessed product part is registered in the remaining material attribute element Zi as the remaining material.

(6) As shown in FIG. 14, when the processing is interrupted in the above-mentioned processing (3), the material cannot be reused as the remaining material, so that it is not registered as the remaining material.

Next, the DNC processing method according to the present invention will be described. Referring to FIG. 15, when the DNC processing is started (step SS), it is determined whether the immediately preceding execution schedule is interrupted or completed (step S1). Therefore, at first, since there is no previous schedule, it is regarded as completed. If it is determined to be completed, the processing result attribute element Ri of the processing result database 31 is updated by the processing result attribute element update processing unit 15 (step S2). Referring to FIG. 16, in updating the processing result attribute element Ri, the processing schedule attribute element Si related to the processing is read from the processing schedule database 19 and the processing result attribute element Ri of the processing result database 31 is updated.

When the update of the processing results is completed, the inventory attribute element group update processing unit 17 updates the inventory attribute element group (step S3). Referring to FIG. 17 and FIG.
The update process of the inventory attribute element group is performed at the time of the schedule processing result and the processing interruption processing, from the processing result attribute element Ri, the NC processing information attribute element Ci, and the board removing configuration attribute element Ni to the inventory attribute element group (location position Li, inventory information Ii). , The remaining material Zi, the product Yi, and the material Mi.
The number of materials used in the processing result of the schedule is reduced from the material stock of the stock information, and the stock information is updated from the result (normal completion, interruption) of the corresponding schedule. At the time of normal completion, all component parts of the boarding configuration Ni corresponding to the NC program Pi are developed as product inventory in the product attribute element Yi.
On the other hand, at the time of interruption, referring to the part pointer at the time of interruption of the NC processing information Ci with respect to the corresponding program Pi, the product inventory from the product configuration Ni to the remaining material attribute element Zi and the remaining material attribute element Zi as the product inventory up to the applicable part of the boarding configuration attribute element Ni Generate material figure data.

Then, it is determined whether or not all the schedules have been completed (step S4), and if it has been completed, the processing is terminated (step SE). If not completed, the process returns to step S1 to repeat the subsequent steps.

On the other hand, when it is determined in step S1 that the immediately preceding execution schedule has been interrupted, the schedule operation processing section 11 performs a schedule operation process (step S5). Referring to FIG. 19, in this schedule operation process, the process is started (step SS), a corresponding schedule is assigned and read from the machining schedule attribute element Si, and a schedule assignment process is performed (step SA1). Subsequently, peripheral device control processing such as material, product, and remaining material shelves is performed (step SA2). This material
In the peripheral device control processing such as product / remaining material shelves, a material is unloaded from the material shelf 23 to the processing machine 21 and supplied to the processing machine 21.
, And commands the peripheral device 47 to store the remaining material from the processing machine 21 into the remaining material shelf 27, and status information is sent from the peripheral device 47. . Thereafter, an NC program transfer process is performed (step SA3). In this NC program transfer processing, the NC program transfer processing unit 13
The corresponding NC program is transferred from the program information element Pi, and the process ends (step SE).

Next, NC program transfer processing is performed by NC program transfer processing section 13 (step S).
6). Referring to FIG. 20, in the NC program transfer process, the process starts (step SS), and an instruction to transfer to the NC processing unit 49 of the lower processing machine 21 is received from the schedule operation processing unit 11 (step SS). SB1),
If the operation is not the DNC operation (step SB2), the file is transferred to the NC processing unit 49 to perform the memory transfer (step SB3). On the other hand, if it is determined in step SB2 that the operation is the DNC operation, the NC machining processing unit 49 stores the block counter n of the machining program executed at the time of the interruption (NC machining information Li, machining pointer), and performs the next restart. At the time of machining, the actual machining (drilling, laser cutting only) is passed to the corresponding pointer. NC for storing block-by-block transfer and block-by-block transfer counter n
An instruction is given to the processing section 49 (step SB4). Then, it is determined whether or not the transfer has been completed for all blocks (step SB5), and when all blocks have been completed, the process ends (step SE). If not completed, the process returns to step SB4 to repeat the subsequent steps.

From the NC program transfer processing unit 13
Upon receiving the CNC transfer of the C processing program, the NC processing unit 49 performs the NC processing (step S7). FIG.
1, the NC processing is started (step SS), and the processing pointer (next processing start pointer) stored in the NC processing information Ci, which is various kinds of storage information at the time of interruption, the NC processing condition, Restoration and repair of the NC machining state and the part pointer are performed (step SC1). Next, D
It is determined whether the operation is the NC operation or not (step SC2).
The i-block is read (step SC3). On the other hand, DN
If it is not C operation, the NC program Pi
The block is read (step SC4). Subsequently, it is determined whether or not there has been an interruption (step SC5), and if it has been interrupted immediately before, the actual machining such as drilling or cutting is skipped to the machining start pointer at the time of interruption (step S5).
C6). It is determined whether or not the passed position is after the machining start pointer (step SC7). If the position is later or if it is determined in step SC5 that it is not interrupted, N is determined.
C actual processing is performed (step SC8). After the actual processing or when it is determined in step SC7 that it is not after the processing start pointer, the processing state is updated and stored in the NC processing information Ci (step SC9). When the machining is completed or interrupted (step SC10) in this manner, the process ends (step SE). When the machining is not completed, the process returns to step SC2 to repeat the subsequent steps.

When the NC processing is completed as described above, it is determined whether or not the processing is interrupted (step S8).
If there is a processing interruption, the NC processing information attribute element Ci at the time of the processing interruption is stored (step S9). If the processing is not interrupted, the NC processing information attribute element Ci for completion is stored (step S10).

When the above processing is completed, step S
Returning to step 1, the subsequent steps are repeatedly executed.

Referring to FIGS. 22 and 23, an example of operation using the above-described DNC processing method and the DNC processing apparatus 1 will be described.

FIG. 22 shows a processing machine cell configuration. In this processing machine cell configuration, the processing machine 21 and the material shelf 2
3, the remaining shelf 27 and the product shelf 25 are the same as those described above, but the product shelf 25 can be omitted.

FIG. 23 shows an operation example. After the interruption occurred while the processing of the order 30 was performed by the schedule processing, the processing of the order 40 was performed and completed. Subsequently, a case where the processing of the interrupted order 30 is performed as the order 50 is shown.

From the above results, when the machining is interrupted, the execution program position and machining information during the NC program machining in the schedule operation are stored, and the actual machining is resumed after performing the automatic restoring process up to the point of interruption when reworking. Therefore, the program can be executed from an appropriate program position, and machining can be resumed quickly.

In particular, this method is effective when the material W to be handled is large and heavy, or when the processing time in the processing machine 21 is long and the schedule is frequently interrupted or interrupted, for example, in thick plate processing, plasma processing, or laser processing. is there.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0040]

As described above, in the DNC processing method according to the first aspect of the present invention, if an interruption occurs when processing a product from a nested sheet material, the execution position of the NC program at the time of the interruption and Processing information,
The stock status of the material storage, product storage, and remaining material storage is stored, and when processing is resumed, the stored NC program is passed without performing actual processing to the execution position at the time of interruption, and is stored. Since the actual machining is resumed from the machining information and the stock state at the time of the interruption, the machining can be immediately resumed from the machining state and the stock state at the time of the interruption. This not only saves processing time, but also allows processing to be performed without wasting materials and residual materials.

In the DNC processing apparatus according to the second aspect of the present invention, when an interruption occurs when processing a product from a nested sheet material, the execution position of the NC program at the time of occurrence of the interruption is stored in the processing schedule database. Processing information such as processing conditions, dies and coordinates used is stored in the processing information database, and the stock status of the material storage, product storage, and remaining material storage when processing is interrupted is stored in the inventory information database. When resuming machining, the NC machining machine passes without performing actual machining to the execution position at the time of interruption stored in the machining schedule database, and executes the machining state at the time of interruption stored in the machining information database. Since actual machining is resumed from the stock state at the time of interruption stored in the stock information database, machining can be immediately resumed from the machining state or stock state at the time of interruption. This not only saves processing time, but also allows processing to be performed without wasting materials and residual materials. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a DNC processing apparatus according to the present invention.

FIGS. 2A and 2B are explanatory diagrams showing the contents of a processing schedule attribute element.

FIG. 3 is an explanatory diagram showing the contents of an NC program information element.

FIG. 4 is an explanatory diagram showing the contents of a processing result attribute element.

FIG. 5 is an explanatory diagram showing the contents of a paneling configuration attribute element.

FIG. 6 is an explanatory diagram showing the contents of an NC processing information attribute element.

FIG. 7 is an explanatory diagram showing the contents of a stock attribute element.

FIG. 8 is an explanatory diagram showing the contents of a material attribute element.

FIG. 9 is an explanatory view showing one-to-one processing of a material and a product.

FIG. 10 is an explanatory view showing processing in which a product is separated from a nested material and managed separately.

FIG. 11 is an explanatory view showing a case of micro joint processing.

FIG. 12 is an explanatory diagram showing an example of a case where the processing is interrupted in the middle of processing.

FIG. 13 is an explanatory diagram showing another example in the case of interruption during the processing.

FIG. 14 is an explanatory diagram showing still another example in the case of interruption during the processing.

FIG. 15 is a flowchart showing a DNC processing method according to the present invention.

FIG. 16 is a flowchart illustrating updating of a processing result to a processing result attribute element.

FIG. 17 shows a processing result attribute element, a board cutting configuration attribute element, and N
It is explanatory drawing which shows the intermediate system of C processing information.

FIG. 18 is an explanatory diagram showing a process of updating the inventory attribute element group.

FIG. 19 is a flowchart showing the contents of a schedule operation process.

FIG. 20 is a flowchart showing the contents of an NC program transfer process.

FIG. 21 is a flowchart showing the contents of NC processing.

FIG. 22 is a diagram illustrating a DNC processing method and a DNC according to the present invention;
FIG. 3 is a block diagram showing a processing machine cell configuration using a processing device.

FIG. 23 is a diagram showing a DNC processing method and a DNC according to the present invention;
It is a block diagram showing an example of operation of a processing device.

FIG. 24 is a block diagram showing conventional DNC processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DNC processing apparatus 3 Upper controller 19 Processing schedule database 21 Lower processing machine (NC processing machine) 23 Material shelf (Material storage area) 25 Product shelf (Product storage area) 27 Remaining material shelf (Remaining material storage area) 35 Processing information database 37 Inventory Information database

Claims (2)

[Claims] 1. A process for processing a material from a material storage area to accumulate products in a product storage area by a scheduled operation of an NC processing machine under the control of a host controller, and for returning to the remaining material storage area when residual material is generated. In the method,
When a machining interruption occurs during the scheduled operation of the nested NC program, the execution program position and machining information in the NC program at the time of the machining interruption and information on inventory management of materials, products, remaining materials, etc. are stored. In addition, when the machining is resumed, the actual machining is resumed after passing the execution program position at the time of the interruption and performing the automatic restoration processing, and then resuming the actual machining. 2. A process for processing a material from a material storage area to accumulate products in a product storage area by a scheduled operation of an NC processing machine under the control of a host controller, and returning the remaining material to the remaining material storage area when remaining material is generated. A device,
A machining schedule database that stores the execution program position in the NC program when machining is interrupted when machining is interrupted during the scheduled operation of the nested NC program, and stores various machining information when the machining interrupt occurs. And a stock information database that stores the stock of a product storage area, a material storage area, and a remaining material storage area when the processing is interrupted, and the NC processing machine is configured to control the upper controller when the interrupted processing is resumed. From the machining schedule database transferred to the NC program execution position at the time of occurrence of the interruption stored in the machining schedule database without performing actual machining, and is stored in the machining conditions stored in the machining information database and the stock information database. Whether it is in stock It is configured to then perform the actual machining, DNC processing apparatus according to claim.