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Laser welding method for metal part by dual-wavelength dual laser beam

A metal parts, laser welding technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of high welding cost and high price, avoid capital investment, improve absorption effect, and reduce welding seam width Effect

Inactive Publication Date: 2010-06-16
CHINA FIRST AUTOMOBILE
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Problems solved by technology

But under the same power, YAG solid-state laser is expensive, and the welding cost is higher than that of CO 2 many lasers

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  • Laser welding method for metal part by dual-wavelength dual laser beam
  • Laser welding method for metal part by dual-wavelength dual laser beam

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Embodiment Construction

[0008] Below in conjunction with accompanying drawing, the present invention will be further described: as figure 1 As shown, the laser welding method of dual-wavelength dual-laser beams on metal parts is characterized in that two laser beams of two wavelengths are used to perform laser welding on the same position 3 of the metal part at the same time after focusing, and the laser beams are processed according to their The role in the welding process can be divided into main laser beam 1 and auxiliary laser beam 2. Main laser beam 1 is CO with a laser power range of 0.2-20 kW 2 Laser, the auxiliary laser beam 2 is a YAG laser with a power range of 0.1-2 kW. The specific method is: after focusing the laser beams of two wavelengths to form a reasonable spatial relative position match, the wavelength is 10.6 microns CO 2 The focused focus of the laser beam 1 is basically coincident with the focused focus of the YAG laser beam 2 with a wavelength of 1.06 microns. The temperatur...

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Abstract

The invention relates to a laser welding method for a metal part by dual-wavelength dual laser beam, which is characterized in that: two laser beams with two wavelengths are focused, and laser welding processing is performed on the same position of the metal part. The two laser beams are divided into a main laser beam and an auxiliary laser beam according to effects thereof, wherein the main laser beam is CO2 laser with a laser power range of 0.2 to 20 kilowatts, and the auxiliary laser beam is YAG laser with a power range of 0.1 to 2 kilowatts. The dual-wavelength dual laser beam is used to perform laser welding on the metal part, wherein one laser beam is the main laser beam used for supplying main energy needed by welding the part, and the other laser beam is the auxiliary laser beam used for improving the absorptivity of the metal part surface on the main laser beam. The power of the YAG laser can be low, the cost can be lowered remarkably and the performance can be stable. Meanwhile, the welding quality of the metal part is improved remarkably.

Description

Technical field: [0001] The invention relates to a laser welding method for metal parts with double-wavelength and double-laser beams, and is a novel laser welding technology for metal parts. Background technique: [0002] Existing laser welding technology for metal parts usually uses a single laser (outputting a single-wavelength laser beam) for laser welding. Commonly used lasers are CO 2 lasers and YAG lasers. CO 2 The laser wavelength of the laser is 10.6 microns; the laser wavelength of the YAG laser is 1.06 microns. [0003] CO 2 The cost of the laser is low and the performance is stable, but the welding quality is limited due to the high reflectivity of the metal parts to the output laser with a wavelength of 10.6 microns. For example, the welding heat-affected zone, welding depth and surface state are obviously not as good as YAG short-wavelength laser welding. Due to the short wavelength of YAG laser, the reflectivity of the surface of the metal part is low, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24
Inventor 郑培和姚远魏伟陈明孔德举秦芳喻皓淳
Owner CHINA FIRST AUTOMOBILE
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