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Resistance projection welding for TO-Can style package

Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 255-262页

作者： Her-Yueh Huang Kuang-Hung Tseng Department of Materials Science and Engineering National Formosa University Department of Materials Engineering National Pingtung University of Science and Technology

The effects of the process parameters on the joint quality of TO-Can using resistance projection welding were investigated.A capacitor discharge stored energy welding machine was used for joining caps and headers both coated with nickel SPCC *** electrode materials used in this study were brass and W-Cu ***-tal results indicated that the peak current of the W-Cu electrode was higher than that of the brass electrode,irrespective of the operating pressure *** operating pressure influenced the interfacial heat generation and nugget *** nugget area increased rapidly with increasing charging voltage,resulting in ex-pulsions and electrodes getting *** acceptable welding zone was found in the relationship between the charging voltage and the operating *** test specimens of the acceptable welding zone satisfactorily passed the helium leak *** microscopic morphology of the nugget showed a recrystallized fine grain structure resulting in the nugget being harder than with the HAZ.

关键词： projection welding TO-Can Process parameters Acceptable welding zone Helium leak test

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Numerical Simulation of projection welding Processes for Door Hinge of Automobile Based on Coupled Fields Analysis

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Journal of Shanghai Jiaotong university(Science) 2007年第1期12卷 111-115页

作者：钱昌明罗爱辉陈关龙 School of Mechanical Eng. Shanghai Jiaotong Univ.

projection welding is a variation of electric resistance welding with the dynamic changes of the flow paths for heat and electrical properties with changing temperature caused by the large plastic deformation collapse of projection. As the joint type between the auto door hinge and the inner plate, projection welding may bring welding distortions and would affect the assembly quality of auto body. A comprehensive electric-thermal-mechanical numerical simulation was performed to quantitatively simulate the processes of projection welding by using a coupled finite element method. The mechanism of projection collapse and the formation process of nugget were discussed and good conclusions have been achieved comparing with the test results.

关键词： projection welding coupled finite element method(FEM) numerical simulation

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Effects of surface treatments of galvanized steels on projection welding procedure

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China welding 2003年第2期12卷 103-106页

作者：王敏王宸煜 School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200030

A group of projection welding experiments and joints tension-shear tests are carried out for cold-rolled steel sheets, galvanized steel sheets (GSS) without treatment, GSS with phosphating and GSS with surface greasing, respectively. The experimental results are regressively analyzed on the computers, then the projection welded joint tension-shear strength curve and the perfect welding currents range of each material are obtained. The results show that surface treatments of galvanized steels have effects on their spot weldabilities. Among the four kinds of materials, GSS with surface greasing have the worst spot weldability, for they need higher welding current and have a narrow welding current range.

关键词： galvanized steel sheets projection welding surface treatment

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