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Electromagnetic field-assisting laser cutting method

A technology that assists laser and cutting methods, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of molten metal reverse spraying and cutting cannot continue, so as to avoid reverse spraying, improve cutting effect, and suppress plasma The effect of body formation

Active Publication Date: 2019-10-01
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the molten metal appears in the corner of the laser cutting thick plate and "reverse spraying" occurs upwards, so that the cutting cannot continue

Method used

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Embodiment Construction

[0038] The following is attached Figure 1~4 The technical solution of the present invention will be described in detail along with specific embodiments.

[0039] Such as Figure 1~4 As shown, in the embodiment of the present invention, an electromagnetic field assisted laser cutting method includes the following steps.

[0040] Step 1: Fix the electromagnetic coil 10 on the laser cutting head 1 and move with the laser cutting head 1 .

[0041] In this embodiment, the magnitude of the electromagnetic field generated when the electromagnetic coil 10 is activated is 0.1-5 T.

[0042] Step 2: Arranging the gas heating device 12 in the cutting auxiliary gas gas path.

[0043] In this embodiment, nitrogen is selected as the auxiliary gas for cutting, and its purity is 99.999%.

[0044] Step 3: Place the bottom shielding gas device 9 under the corner of the workpiece to be cut.

[0045] In this embodiment, the workpiece to be cut is a stainless steel plate with a thickness of 1...

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Abstract

The invention relates to an electromagnetic field-assisting laser cutting method which is characterized by comprising the steps of (1) fixing an electromagnetic coil onto a laser cutting head, and moving along with the laser cutting head; (2) arranging a gas heating device into a cutting assisting gas circuit; (3) arranging a bottom shielding gas device under a corner part of a workpiece to be cut; (4) defining a corner cutting lead-in section and a corner cutting lead-out section in a laser cutting track; (5) starting a laser cutting system, turning on a cutting assisting gas heating device when a laser beam moves to a starting point of the corner cutting lead-in section, starting an electromagnetic field, and starting the cutting of a corner area; (6) when the laser beam moves to a termination point of the corner cutting lead-out section, turning off the cutting assisting gas heating device, closing the electromagnetic field, and finishing the cutting of the corner area; and (7) whenarriving at the cutting tail end point, turning off a laser generator, turning off a cutting assisting gas switch, and accomplishing a cutting process. Compared with the prior art, the electromagnetic field-assisting laser cutting method provided by the invention has a favorable cutting effect.

Description

technical field [0001] The invention relates to a laser cutting method, in particular to a method for laser cutting corners of thick plates. Background technique [0002] At present, laser cutting technology has been widely used in sheet metal processing, metallurgical equipment, construction machinery, precision accessories, craft gifts, household appliances and many other fields. At present, the traditional laser cutting metal mainly uses the optical system in the cutting head to converge on the surface of the material to melt it, and provides auxiliary gas to blow off the melted material to achieve cutting. However, when fiber laser is used to cut thick stainless steel plates, the laser energy is intensively accumulated at the corners, which may easily cause the phenomenon of "reverse spraying" at the corners, resulting in the inability to cut. [0003] The invention patent published on May 13, 2015, the publication number is "CN 104607805 A", and the invention title is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/38B23K26/12B23K26/70
CPCB23K26/123B23K26/38B23K26/70
Inventor 戴家辉张明军陈顺吴杰曹太山李河清
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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