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Study on New Technology of Resistance Spot Welding with a Joining Element

Author: TianXueYan
Tutor: WuPei
School: Inner Mongolia Agricultural University
Course: Mechanical Design and Theory
Keywords: Resistance Spot welding Joining element New technology
CLC: TG453.9
Type: Master's thesis
Year: 2009
Downloads: 54
Quote: 1
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Abstract


The resistance spot welding (RSW) is widely used in manufacture of aerospace, automobile, agricultural machinery and other appliances due to its advantages of high productivity, low pollution, good weld quality, and easy to automation. However, the traditional RSW technology has the shortcomings of surface deformation, bigger HAZ, weld nugget depended on the thickness of the specimens , small weld nugget and low intensity for the thin workpiece , as well as the heavier electrode wear.In this paper,a new technology of resistance spot welding with the joining element is proposed. The principle of the new technology is presented and the comparison tests with the traditional spot welding is performed using low carbon steel plates as the specimens. The weld quality of the welding joint was checked by the tensile-shear tests and the microstructure analysis. The results show that the new technology has the apparent advantages, having solved the problems that the traditional spot welding has, this includes the small surface deformation, low electrode wear, weld nugget diameter unrelated to the specimen thickness, and energy saving because the new spot welding technology with joining element requires lower welding current in the case of same weld quality acquired and same welding time used. The disadvantages of the new technology is that it needs a additional element and sometimes a gap is left beside the weld nugget.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Pressure welding > Other pressure welding
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