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Dual-beam laser welding method and welding device

A laser welding and welding device technology, which is applied in the field of double-beam laser welding method and welding device, can solve the problems of increased penetration of the lower plate of the lap joint, protruding deformation of the exposed surface affecting the appearance quality, fluctuations in weld penetration, etc.

Active Publication Date: 2020-10-23
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

For this reason, the present invention proposes a double-beam laser welding method to solve the obvious fluctuations in the weld penetration corresponding to the single-beam laser, which may increase the penetration depth of the lower plate of the lap joint, resulting in convexity of the exposed surface. Deformation affects appearance quality

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  • Dual-beam laser welding method and welding device
  • Dual-beam laser welding method and welding device

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Embodiment Construction

[0048] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0049]In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as...

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Abstract

The invention relates to the technical field of welding, in particular to a dual-beam laser welding method and a welding device. The dual-beam laser welding method comprises the following steps: welding an overlap joint by utilizing a double-beam laser; and in the welding process, changing the clearance between beams of the dual-beam laser, so that the variation amplitude of the fusion depth of alower-layer plate of the overlap joint can be lower than or equal to the preset upper threshold of the fusion depth. Through the dual-beam laser welding method, the following beneficial effects are achieved: on the one hand, the weld surface forming quality can be effectively improved and the stability of the welding process can be remarkably improved; on the other hand, the weld of the overlap joint can meet the design requirements for different weld strengths of various overlap joints; and furthermore, the adaptability to the assembling clearance of the overlap joint can be improved, the welding process window can be effectively expanded, and the adaptability to the welding process can be greatly improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a double-beam laser welding method and a welding device. Background technique [0002] Due to the advantages of high strength and good corrosion resistance, stainless steel has been widely used in many fields. As a car body material, stainless steel does not need to be painted and has a beautiful shape, so it is increasingly used in the field of rail transit. In the stainless steel car body, the main structure of the side wall is the lap joint formed by the side wall plate and the reinforcement member. Laser welding is mainly used for welding the lap joint at present, and the requirements for the quality of the weld are very strict, including: On the one hand, in order to meet the requirements of connection strength, the joint surface of the upper and lower plates of the lap joint needs to have a certain fusion width; control. [0003] However, if Figure 1 to Figure 3 As sho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/244B23K26/60B23K26/70
CPCB23K26/244B23K26/60B23K26/70
Inventor 马国龙韩晓辉李刚卿李帅贞
Owner CRRC QINGDAO SIFANG CO LTD
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