We welded the high strength steel BIF340 in different spot welding processing parameters, the structure and property of the welding joint are analyzed.

采用不同的点焊工艺参数对高强度钢板BIF 340实施焊接，并对焊接接头进行组织性能分析，研究点焊参数对BIF 340焊接性能的影响。

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Simultaneously, the sensing mode for spot welding current was chosed and an structure of integral circuit and system circuit was designed.

同时，进行了点焊焊接电流方式的选择，积分电路和系统电路的设计。

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Stress and strain around welded spot of spot welding structure are analyzed in detail with ANSYS numerical simulation software.

采用A NSYS数值模拟软件，对点焊结构焊点附近的应力应变状况进行了详细的分析。

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