JPH08137533A - Nc nesting working method - Google Patents

Abstract

PURPOSE: To quickly and easily perform the nesting operation of various works whose outside dimensions and surface shaped are different and to perform the nesting operation for which raw materials and remainder materials coexist by using nesting data generated by combining the NC sub routines of respective single items as an NC program as they are. CONSTITUTION: Work management is performed by the procedure of appropriately distributing the outside dimensions and surface shape of the work inputted to a server 3, that are work management data, to a client 4. In the client 4, in order to perform nesting so as to most efficiently perform plural taking from the raw materials or the remainder materials recognized at present, the outside dimensions and surface shape of the work and the nesting data generated by combining the NC sub routines are compared. The nesting data selected and decided as the result are turned to the NC program. Also, in a CAD system connected to a network, CAD data are prepared inn coordinate systems for the respective single items and the NC sub routines are attained while maintaining the coordinate systems.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has nesting work (single product or plural types, plural work) for taking a plurality of flat work and management work of a flat work in which raw materials or residual materials are mixed. It relates to an NC processing method.

In the present invention, a work means a flat work unless otherwise specified. In addition, the raw material refers to a new work that has not yet been taken multiple times, and the residual material is taken once or more than once
This refers to a work that includes (a part where multiple cuttings have been performed) or cuts off the end material and has a different shape or size from the raw material.

[0003]

2. Description of the Related Art A case will be described in which a large number of raw materials for rectangular workpieces are taken out from a stocker and a plurality of products (hereinafter, referred to as single products) are taken by a laser beam machine. Conventionally, when using a laser processing machine to take multiple single items of the same shape from raw materials,
An NC program was created by data processing from nesting data in which the repetition of CAD data of the single item linked by relative coordinates was integrated, and the laser beam machine was operated. This nesting data was applied to the work managed by each external dimension.

[0004]

In the conventional NC processing,
Because some correction of nesting data will spread to the whole,
It was difficult to individually modify individual items, and the nesting data used for a raw material of a certain size was slightly modified and used as a raw material or a residual material of another size, which lacked the convenience. In addition, the NC program created from nesting data that integrates the repeated CAD data of a single item is inaccurate in the CAD data of each individual item or the relationship between them due to the decrease in accuracy due to the conversion of data, and the shape of each individual item is changed. There was a problem that there were variations.

On the other hand, paying attention to the case where a certain raw material is processed by a laser beam machine, a distortion peculiar to the laser beam machine may occur depending on the shape and arrangement of a single product. Since the NC program is created from the nesting data for the entire work, the strain generated during the machining affects the arrangement relationship of each single item in the nesting data, and its removal is difficult.

In addition, the conventional N created by combining nesting data by combining CAD data of a single item
There has been a problem that the C program is bloated and put pressure on the memory of the NC controller. Nowadays, with high-mix low-volume production and short delivery time, it is normal not to finish multiple productions from one raw material at a time, but from a cost perspective, it is normal to take a new one from the remaining material at a later date. The problem was inconvenient. Therefore, the nesting data work in the work processing was reviewed, and work management that enables the construction of a line in which raw materials and residual materials were mixed was examined.

[0007]

[Means for solving the problem] Thus, as a result of the examination,
What we have developed is that, in the operation of performing NC processing by nesting multiple flat plate workpieces, the outer dimensions and surface shape of each individual flat plate workpiece are managed together, and the coordinates of the CAD data for each individual piece A creation stage for creating an NC subroutine while maintaining the system,
An NC nesting processing method comprising a step of combining nest data created by adding movement data or repetitive data in absolute coordinates on a flat plate work to this NC subroutine as an NC program for this work.

When the above-mentioned processing method is applied to a laser processing machine, it is preferable to provide the NC subroutine with a combining step in which nesting data created by adding one or more slit data together with movement data or repetitive data into an NC program. .

[0009]

In the NC nesting processing method of the present invention, the nesting data created by combining the NC subroutines of the individual products in the nesting work is directly used as the NC program. Therefore, it is possible and easy to correct the CAD data or the NC subroutine for each individual product, and to eliminate the influence of the modification on the NC subroutines of other individual products, and by repeating the NC subroutine, it is possible to obtain accurate multiple copies of the same single product. To realize. Further, the capacity can be reduced as compared with the case where the CAD data for the entire work is integrated and then the NC program is performed.

The slit data to be added to the NC subroutine together with the movement data or the repeated data is laser generated around the surface of the work piece which is distorted or is likely to be distorted, especially in NC processing by a laser processing machine. This is to form a groove for connecting and disconnecting the work by the processing machine, so that it is possible to prevent the influence of the distortion between the single products facing each other across the slit.

Further, in the work management work in the NC nesting processing method of the present invention, the outer dimensions and the surface shape are individually recognized for each work,
The difference between the raw material and the residual material can be identified based on the size of the raw material and the presence or absence of the scrap material, and both can be mixed and processed on the same line to effectively operate the nesting work described above. Can be something.

[0012]

[Embodiment] In the following, for a line in which raw materials or residual materials are transferred from the stocker 1 to the laser processing machine 2 and a plurality of materials are taken,
An example in which the NC nesting processing method of the present invention is adopted will be described with reference to the drawings. FIG. 1 shows the N of the present invention.
FIG. 2 is a configuration diagram of an embodiment to which the C nesting processing method is applied, and FIG. 2 is a layout diagram showing the relationship of the specific device.

In the present embodiment, as shown in FIG. 1, a series of systems in which the NC nesting processing method of the present invention is applied to individual laser processing machines 2 scattered in a factory are constructed, and It has a form of network connection. The work management is performed by a procedure of appropriately distributing the outer dimensions and surface shape of the work, that is, the work management data input to the server 3, to the clients 4. In this embodiment, the raw data, the outer dimensions of the remaining material, and the data on the surface shape are manually input, but for example, automatic loading from the warehouse to the stocker, removal of scraps from the workpieces after multiple picking, etc. Information can be collected automatically and data entry can be automated.

In the client 4, in order to perform nesting so that a plurality of pieces can be taken most efficiently from the raw material or the remaining material which is currently grasped, the nesting data created by combining the outer shape and surface shape of the work with the NC subroutine. Compare with. As a result, the selected and determined nesting data becomes the NC program. In this embodiment, the work management data and the nesting data can be compared visually and easily on the screen of the computer. Further, the nesting data adapted to the work management data can be changed only by changing the NC subroutine and its movement data or repetitive data.
Especially, there is an advantage that even a worker who is not familiar with computers can do it.

The NC subroutine is created in a CAD system (not shown) connected to the network found in FIG. In this CAD system, CAD data is created in the coordinate system for each individual product, and the NC subroutine is performed while maintaining the coordinate system. N created in this way
The C subroutine is stored in an external storage device or the like as a part for creating nesting data, and is loaded into a computer that performs nesting work as needed.

The nesting data determined for a specific raw material or residual material is sent to the laser processing machine 2 as an NC program, and at the same time, the loader 5 carries the work from the stocker 1 to the laser processing machine 2. When the multi-taken by the laser processing machine 2 is completed, with respect to the work having a room for taking the multi-taken except for the end material, it is recovered as a residual material obtained by cutting the end material or a residual material including the end material, The work management data of the remaining material is sent back to the server 3. The work that is only the scrap material will be discarded as waste material. In this way, a series of flow is completed.

Specifically, as shown in FIG. 2, the above-described series of flow can be realized by a system using a personal computer as a control device. Work management data on raw materials is input to the server 3 and each laser processing machine 2
It is sent to the client 4 corresponding to (only the work table is shown). Further, the work management data regarding the residual material is sent to the client 4 from the stocker 6 of the residual material including the scrap material or the stocker 7 of the residual material obtained by cutting the scrap material. The worker performs a nesting operation on the client 4 for the work management data in which the raw material and the residual material that can be processed in the current line are mixed.

The nesting data is optimally determined by the operator of the client 4 and the processing of the personal computer. For example, in the nesting work, when the work stored in the stocker 6 of the residual material including the scrap material is determined, the client 4 automatically arranges the slit for removing the distortion peculiar to the laser processing machine while the PC automatically arranges the NC subroutine. To create nesting data, and use the optimum nesting data as an NC program, stocker 6, loader 5, and laser processing machine 2
And sends an NC program to the laser processing machine 2 at the same time to start the work.

FIG. 3 shows an example of the created nesting data, which is a single NC subroutine S1, S2, of the same or different shape.
FIG. 6 is a diagram showing a state in which S3 is added to each of movement data x1, x2, x3 or repetitive data n1 and assigned to the selected work. In this example, the slit data t1, t2, t3 is further added to each NC.
In addition to during the subroutine, multiple laser processing machines can be used without distortion. If it is decided to perform the NC work with this nesting data, this nesting data becomes the NC program.

The NC-processed work is sent to the stocker 6 with the leftover material left, if the plurality of portions that can be taken are left excluding the leftover material, or is cut into the stocker 7 to the stocker 7. The work management data is sent and stored, and the work management data is sent to the server 3. Each stocker 6, 7
If there is a change in the work management data of the residual material managed by each, the fact is sent to the server 3 through the client 4. In this way, the raw material and the residual material can be centrally managed in the server 3.

[0021]

The NC nesting method of the present invention is
The nesting work of various works having different outer dimensions and surface shapes can be performed quickly and easily, and the nesting work can be realized on a line in which raw materials or residual materials are mixed. As a result, it will be possible to construct a line that can handle future production forms of high-mix low-volume production and short delivery times.

In the present invention, as shown in the embodiment, it is possible to construct a line connected by a network using a personal computer. Moreover, since the capacity of the created nesting data is small, it is not necessary to add a memory to the NC controller. As described above, since the line to which the present invention is applied can be configured by an inexpensive device, there is an advantage that the line can be applied regardless of the size of the line. In other words, regardless of the scale of the factory, it is possible to realize a future production form.

In addition, even when a single product of the same shape is repeatedly used, accurate multiple cutting can be performed, and slits for preventing the occurrence of distortion in a laser processing machine, which has been difficult to cope with in the past, are added to nesting data according to the surface shape of the workpiece As a result, the yield and quality of products can be improved. As described above, the line to which the present invention is applied has an effect corresponding to the invested capital, that is, is highly cost-effective, which is also a feature of the present invention.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment to which an NC nesting processing method is applied.

FIG. 2 is a layout diagram showing the relationship between specific devices of the embodiment.

FIG. 3 is a diagram illustrating an example of created nesting data.

[Explanation of symbols]

 1 Stocker (raw material) 2 Laser processing machine 3 Server 4 Client 5 Loader 6 Stocker (including scraps) 7 Stocker (without scraps)

Claims (2)

[Claims] 1. In the work of performing NC processing by performing nesting for taking a plurality of flat plate works, the outer dimensions and surface shape of each individual flat plate work are managed together, and the coordinate system of CAD data of each single product is controlled. And a step of creating an NC subroutine while maintaining
An NC nesting processing method comprising: a C sub-routine; and a joining step in which nesting data created by adding movement data or repetitive data in absolute coordinates on a flat plate work is used as an NC program for the work. 2. The NC nesting processing method according to claim 1, further comprising a step of combining the NC subroutine with nesting data created by adding one or more slit data together with movement data or repetitive data to the NC subroutine. .