JP2000263278A - Thermal cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the deformation of a base material and to prevent degradation in the precision of products by dividing the base material into a plurality of specific areas, cutting areas except a plurality of joint parts between the individual divided areas and the base material, and cutting a plurality of products out from each area of the base material. SOLUTION: A base material W is divided into a plurality of specific areas E before a plurality of products are thermally cut out from the entire base material W. With a plurality of joint parts S left at suitable intervals apart between each area E and the base material W, other areas are cut. In this case, the base material W and the divided areas E are not to be fully separated. In such a state, a plurality of products G are thermally cut out from each area E of the base material W. With the joint parts S cut off from the base material W, the thermal cutting is complete. Thermal deformation caused in the machining of the products G is generated only inside the divided areas E, unaffecting the base material W. Thermal cutting is desirably performed with laser beam, plasma or gas fusion machining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cutting method for thermally cutting a plurality of products from a base material.

[0002]

2. Description of the Related Art Conventionally, when a plurality of products are thermally cut from a base material by a thermal cutting machine for performing laser processing, plasma processing, gas fusing processing, or the like, the processing of products is often performed on the base material (constant). Products are cut out from materials larger than the product, such as shaku.

In this case, when the size of the base material is larger than the size of the product, there is a high possibility that the absolute amount of scrap becomes smaller. Larger base materials are often used for processing because of less changeovers. When the product to be processed is small, tens to hundreds of products are allocated and processed. In addition, in order to minimize unnecessary shaft movement, the material is often processed in order from the end.

[0004] For example, as shown in FIG.
In general, 3 '× 6', 4 '× 8'
5 ′ × 10 ′ and the like are used. And FIG. 3 (B)
As shown in (1), the product G is arranged on the base material W and the product G is thermally cut from the base material W so as to improve the yield. In addition, as shown in FIG. 3 (C), from the base material W, for processing efficiency and productivity,
A plurality of products G are thermally cut in the processing order as in (1) or (2).

[0005]

By the way, in the conventional thermal cutting machine, thermal strain, residual stress, and the like affect the base material W, and the deformation (strain) increases as the processing proceeds. Due to this deformation, the processing accuracy of the product G is reduced, and in severe cases, the deformed material interferes with the thermal cutting machine, causing damage to the thermal cutting machine.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce deformation of a base material, prevent a decrease in precision of a product, stop processing,
A thermal cutting method for preventing an accident due to interference or the like from occurring is provided.

[0007]

According to a first aspect of the present invention, there is provided a hot cutting method according to the first aspect of the present invention. Is divided into a plurality of predetermined areas, and a plurality of joints are cut between each of the divided areas and the base material, and the other portions are cut. It is characterized in that the product is hot-cut.

Therefore, before thermally cutting a plurality of products from the base material to the entire base material, the base material is divided into a plurality of predetermined areas. Next, a plurality of joints are left between the divided areas and the base material, and the other parts are cut off. In this state, a plurality of products are thermally cut from the base material for each area. Thereafter, the joint portion is cut from the base material, and the hot cutting is completed.

Thus, the deformation of the base material is reduced,
A decrease in the accuracy of the product is prevented, and the occurrence of an accident due to a stoppage of processing or interference is prevented.

In the thermal cutting method according to the present invention, a plurality of products are thermally cut from the base material to a part of the base material, and then a part of the base material is divided into predetermined areas. Then, leaving a plurality of joints between the divided area and the base material and cutting other portions, a plurality of products are thermally cut from the base material to the area. Things.

Therefore, before a plurality of products are thermally cut from the base material to a part of the base material, a part of the base material is divided into certain areas. Next, a plurality of joints are left between the divided area and the base material, and the other parts are cut off. In this state, a plurality of products are thermally cut from the base material to the area. Thereafter, the joint portion is cut from the base material, and the hot cutting is completed.

Thus, while the deformation of the base material is reduced,
A decrease in the accuracy of the product is prevented, and the occurrence of an accident due to a stoppage of processing or interference is prevented.

According to a third aspect of the present invention, there is provided a hot cutting method according to the first or second aspect.
The thermal cutting process is a laser process, a plasma process, or a gas fusing process.

Therefore, by performing the thermal cutting by laser processing, plasma processing or gas fusing, high-precision thermal cutting is performed.

[0015]

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

Referring to FIG. 1A, before subjecting a plurality of products to thermal cutting of the entire base material W, a predetermined plurality of areas E are formed in the base material W, for example, in the horizontal direction in FIG. Into three parts. Next, a plurality of joints S are left at appropriate intervals between the divided areas E and the base material W, and the other parts are cut off. At this time, the base material W and the divided area E are not completely separated.
In addition, the shorter the cutting length with respect to the area E, the smaller the amount of applied heat and the smaller the thermal strain.
In this state, as shown in FIG.
Then, a plurality of products G are thermally cut for each area E. Thereafter, the joint portion S is cut from the base material W, and the thermal cutting is completed. At this time, the thermal strain generated when processing the product G occurs only in the divided area, and hardly affects the base material W. Moreover, since the divided area E is also connected to the base material W, deformation can be suppressed.

Therefore, the deformation of the base material W can be reduced, the accuracy of the product G can be prevented from lowering, and furthermore, the occurrence of an accident due to a stoppage of machining or interference can be prevented. .

Referring to FIG. 2A, when processing a fixed-length material or the like, the base material W may be excessive even when all the products are allocated. At this time, it is first divided into necessary material sizes. That is, a part of the base material W from the base material W, for example, FIG.
Before a plurality of products are thermally cut on the left side in (A), a part of the base material W from the base material W, for example, the left side in FIG. Next, a plurality of joints S are left between the divided area E and the base material W, and the other parts are cut. In this state, a plurality of products G are thermally cut from the base material W to the area E as shown in FIG. Thereafter, the joint portion S is cut from the base material W, and the thermal cutting is completed. At this time, the thermal strain generated when processing the product G occurs only in the divided area E, and hardly affects the base material W. Moreover, since the divided area E is also connected to the base material W, deformation can be suppressed.

Since the divided area E is merely attached to the base material W by the joint portion S as shown in FIG. 2C, it can be easily separated from the base material W. In this way, the deformed area E becomes the base material W
Therefore, stable processing can be performed without adversely affecting subsequent processing.

Therefore, the deformation of the base material W can be reduced, the accuracy of the product G can be prevented from lowering, and the occurrence of an accident due to a stoppage of processing or interference can be prevented. .

When the thermal cutting is performed by laser processing, plasma processing or gas fusing, high-precision thermal cutting can be performed.

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

[0023]

According to the first aspect of the present invention, before a plurality of products are thermally cut from the base material to the entire base material, the base material is divided into a plurality of predetermined areas. Next, a plurality of joints are left between the divided areas and the base material, and the other parts are cut off. In this state, a plurality of products are thermally cut from the base material for each area. Thereafter, the joint portion is cut from the base material, and the hot cutting is completed.

Therefore, the deformation of the base material can be reduced, the accuracy of the product can be prevented from lowering, and the occurrence of an accident due to a stoppage of processing or interference can be prevented.

According to the second aspect of the present invention, before a plurality of products are thermally cut from a base material to a part of the base material, a part of the base material is divided into predetermined areas. Next, a plurality of joints are left between the divided area and the base material, and the other parts are cut off. In this state, a plurality of products are thermally cut from the base material to the area. Thereafter, the joint portion is cut from the base material, and the hot cutting is completed.

Therefore, the deformation of the base material can be reduced, the accuracy of the product can be prevented from lowering, and the occurrence of an accident due to a stop of processing or interference can be prevented.

According to the third aspect of the present invention, the thermal cutting is performed by laser processing, plasma processing, or gas fusing, so that high-precision thermal cutting can be performed.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views illustrating a thermal cutting process according to the present invention.

FIGS. 2A, 2B, and 2C are explanatory views illustrating a thermal cutting process according to another invention.

FIGS. 3A, 3B, and 3C are explanatory views illustrating a conventional thermal cutting process.

[Explanation of symbols]

 W Base material E Area S Joint part G Product

Claims (3)

[Claims] Before a plurality of products are thermally cut from a base material to the entire base material, the base material is divided into a plurality of predetermined areas, and a plurality of areas are provided between each of the divided areas and the base material. A thermal cutting method characterized in that a plurality of products are subjected to thermal cutting for each area from the base material after cutting the remaining portion except for the joint portion. 2. A method according to claim 1, wherein a plurality of products are thermally cut from the base material to a part of the base material, and a part of the base material is divided into predetermined areas. A method of cutting a plurality of products from the base material to the area after cutting the other portions while leaving a plurality of joints therebetween. 3. The thermal cutting method according to claim 1, wherein the thermal cutting is laser processing, plasma processing, or gas fusing.