Non-splashing dynamically heating self-adaptive resistance welding method for automobile metal sheets

A thin metal plate and dynamic heating technology, which is applied in the direction of resistance welding equipment, metal processing equipment, welding power supply, etc., can solve the problems of excessive spatter and low production efficiency, and achieve the effects of avoiding spatter, stable welding quality, and reducing grinding workload

Active Publication Date: 2013-11-20
TIANJIN SUNKE DIGITAL CONTROL TECH CO LTD
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Problems solved by technology

[0008] The object of the present invention is to overcome the disadvantages of excessive spatter and low production efficiency in the above-mentioned resistance welding method; to provide a method for adaptive resistance welding of au...

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  • Non-splashing dynamically heating self-adaptive resistance welding method for automobile metal sheets
  • Non-splashing dynamically heating self-adaptive resistance welding method for automobile metal sheets
  • Non-splashing dynamically heating self-adaptive resistance welding method for automobile metal sheets

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Embodiment Construction

[0119] Below in conjunction with accompanying drawing and preferred embodiment, the specific implementation mode that provides according to the present invention is described in detail as follows:

[0120] A method for self-adaptive resistance welding of automobile metal sheet without spatter dynamic heating, the implementation steps are as follows:

[0121] Step 1: Select a welding power source

[0122] 1.1 Adopt non-secondary rectification welding transformer and pulse width adjustable AC inverter power supply; ensure positive and negative half-wave alternating and balanced heating, no polarity effect, avoid overheating and splashing on one side of the workpiece; by adjusting the inverter frequency f1= of the power supply 40~150Hz, control t=1000 / f1=5~30ms.

[0123] 1.2 The configuration of other equipment and structural parts is the same as that of conventional resistance welding configuration; including pressurization mechanism, water and gas circuit, fuselage and welding...

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Abstract

The invention relates to a non-splashing dynamically heating self-adaptive resistance welding method for automobile metal sheets, which comprises the following implementation steps: firstly, a nugget formation process is enabled to be kept in the state of non-splashing power-on heating fusion and cooling crystallization heat balance in the way that a non-secondary rectification welding transformer and a pulse width adjustable alternate current contravariant power supply are utilized and different metallic materials thermal balance factors are called; the nugget size is controlled through detecting the change rate of dynamic resistances at the two ends of electrodes. According to the invention, as a non-splashing thermal balance factor, namely t+t0, is adopted in the method, the splashing problem in the welding is effectively solved, and the welding quality is improved; the change rate of dynamic resistances at the two ends of the welding electrodes during the welding can be detected to quickly judge the nugget formation process, so that the interference in the measuring is reduced, and the reliability of the detection is improved; besides, the difficult problem that a plenty of splashes are generated in the welding of automobile metal sheets for a long time is effectively solved, the welding quality and the production efficiency are greatly improved, and the production and processing cost is greatly reduced.

Description

technical field [0001] The invention relates to a thin-plate resistance welding method in the field of automobile manufacturing, in particular to a spatter-free dynamic heating self-adaptive resistance welding method for automobile metal thin plates. Background technique [0002] At present, the resistance welding process methods of hot-formed steel, high-strength steel, and galvanized sheet commonly used in the automobile manufacturing industry include: [0003] (1) Power-frequency AC resistance welding method; using the power-frequency AC resistance welding method to weld thermoformed steel galvanized sheets, due to the single-phase power supply, the power factor is low, and when multiple welding machines are welding at the same time, the impact on the power grid is large, and the voltage drop Large, it is easy to cause unstable welding quality. [0004] (2) Intermediate frequency DC resistance welding method: When using intermediate frequency DC resistance welding method...

Claims

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Application Information

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IPC IPC(8): B23K11/24B23K11/00
Inventor 聂兰民赵继华邓林
Owner TIANJIN SUNKE DIGITAL CONTROL TECH CO LTD
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