A resistance spot welding device for coated high-strength steel

A technology of resistance spot welding and high-strength steel, applied in resistance welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as LME and cracks, reduce current density and contact pressure, reduce heat accumulation, and improve heat dissipation conditional effect

Active Publication Date: 2021-12-17
SHOUGANG CORPORATION
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Problems solved by technology

[0003] The invention provides a resistance spot welding device for coated high-strength steel, which solves the technical problem that LME cracks are prone to occur during the spot welding process of coated high-strength steel in the prior art

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  • A resistance spot welding device for coated high-strength steel

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Embodiment Construction

[0028] The embodiments of the present application provide a resistance spot welding device for coated high-strength steel to solve the technical problem that LME cracks are prone to occur during spot welding of coated high-strength steel in the prior art.

[0029] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application. , rather than limiting the technical solutions of the present application, the embodiments of the present application and the technical features in the embodiments can be combined without conflict.

[0030] see figure 1 A resistance spot welding device for plated high-strength steel, comprising: a first electrode 2, a se...

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Abstract

The invention belongs to the technical field of plated high-strength steel welding, and discloses a resistance spot welding device for plated high-strength steel, comprising: a first electrode, a second electrode, an electrode pressing bracket and a power supply; the first electrode and the second electrode The two electrodes are arranged oppositely, and the pressure applied to the welding object is fixed and adjusted by the electrode pressing bracket; the power supply is connected with the first electrode and the second electrode; wherein, the welding of the first electrode The area of ​​the end surface is smaller than the area of ​​the welding end surface of the second electrode, and the density of the welding current used to control the welding end surface of the second electrode and the pressure applied to the second welding object are smaller than the welding current of the welding end surface of the first electrode The density and the pressure applied to the first welded object. The resistance spot welding device for coated high-strength steel provided by the invention can suppress LME cracks for the coated high-strength steel.

Description

technical field [0001] The invention relates to the technical field of high-strength coated steel welding, in particular to a resistance spot welding device for high-strength coated steel. Background technique [0002] Resistance spot welding is a widely used welding method, and it is the main process of automobile body assembly. According to statistics, there are about 4000-6000 solder joints on a car body. In order to meet the requirements of energy saving and environmental protection, high-strength steel with coating is widely used, which can significantly reduce the weight of the vehicle body while ensuring corrosion resistance. Commonly used coatings include galvanized, galvanized iron alloy, galvanized aluminum-magnesium, etc. However, when the coated high-strength steel is subjected to resistance spot welding, the surface of the steel plate is prone to liquid metal embrittlement (Liquid metal embrittlement, LME), and the LME cracks appear on the surface of the steel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/10
CPCB23K11/10
Inventor 张永强付参伊日贵鞠建斌杨建炜章军
Owner SHOUGANG CORPORATION
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