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Laser welding method and laser welding product

A technology of laser welding and laser beam, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of high reflectivity and low laser energy absorption rate, achieve good absorption, increase absorption rate, high strength and The effect of stability

Inactive Publication Date: 2015-02-11
ZHUHAI GUANGBAO MOBILE COMM TECH
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Problems solved by technology

[0006] An object of the present invention is to propose a laser welding method, which solves at least one of the above-mentioned problems in the prior art by pre-drilling the metal parts to be welded, especially solves the problem that the reflectivity of the metal to the laser is too high and the The problem of low absorption rate of laser energy

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  • Laser welding method and laser welding product
  • Laser welding method and laser welding product
  • Laser welding method and laser welding product

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Embodiment Construction

[0050] figure 1 A first embodiment of the invention is shown in which the first workpiece 10 and the second workpiece 20 are welded together with a laser beam by laser welding, in particular by laser spot welding.

[0051]In the first embodiment, both the first workpiece 10 and the second workpiece 20 have a plate shape. Before laser welding, the first microporous structure 11 is pre-processed on the first workpiece 10, and the first microporous structure 11 is composed of a plurality of first holes 11a in the form of through holes; in addition, on the second workpiece 20 The second microporous structure 21 is also pre-processed on the upper surface, and the second microporous structure 21 is composed of a plurality of second holes 21a in the form of blind holes. Preferably, the number of the second holes 21a is equal to the number of the first holes 11a. The first microporous structure 11 and the second microporous structure 21 are positioned such that when the first workp...

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Abstract

The invention relates to a laser welding method for connecting a first workpiece with a second workpiece to be connected together. The laser welding method comprises the following steps of machining at least one first cellular structure on the first workpiece, wherein the first cellular structure is composed of at least one first hole, and the axial direction of the first hole is approximately parallel to the incidence direction of laser beams during laser welding; partially positioning the first cellular structure within a coverage region of a laser focal point light spot on the first workpiece; performing laser welding to achieve direct incidence of the laser beams and enabling the laser beams to be located on the first cellular structure within the coverage region of the laser focal point light spot. The invention further relates to a laser welding product. The laser welding product laser welding product is obtained by machining at least two workpieces by means of the laser welding method.

Description

technical field [0001] The invention relates to a laser welding method, in particular to a laser spot welding method. The invention also relates to a laser welded product obtained by said laser welding method. Background technique [0002] In laser welding applications, for some workpieces made of materials with high reflectivity to near-infrared lasers or materials with high conductivity to heat, there are problems such as difficult welding, poor welding stability, and low welding strength. [0003] Currently, the commonly used solutions in this field are mainly the following two. One is to increase the laser absorption rate of the material by coating the surface of the metal parts to be welded with an absorbing layer; the other is to use a short-wavelength laser or combine a short-wavelength laser with a YAG (yttrium aluminum garnet) laser ( 1064nm) to improve the laser absorption rate of the material. The short wavelength here refers to the double frequency (532nm) or t...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/70B23K26/382
CPCB23K26/22
Inventor 张松温兴陈汉坚
Owner ZHUHAI GUANGBAO MOBILE COMM TECH
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