采用外界铜板作为导电体的点焊,有单面双点和单面单点两种形式。用一台并列双电极式加辅助电极形式的焊接设备焊接三种搭接接头形式的试件,试件搭接方式分别是:薄板在铬锆铜平台接触,厚板在电极侧,完成单面双点和单面单点的焊接;厚板在铬锆铜平台侧,薄板在电极侧,用单面双点方式进行焊接。焊接电流、压力、时间相同的条件下,对三种形式的焊接试样分别进行拉伸试验和金相试验,分析拉伸力、熔核中的气孔尺寸和熔核尺寸,得出在表面不涂装的不锈钢车辆的侧墙、端墙生产中的焊接影响因素。 The use of external copper as the conductor of spot welding, single-sided double-sided and single-sided two forms. A parallel two-electrode plus auxiliary electrode welding equipment in the form of three lap joints welding specimens, specimen lap joints are: the plate in the chromium-zirconium copper platform contact, the plate on the electrode side to complete the single side Double-point and single-sided single-point welding; thick plate on the side of the chromium-zirconium copper platform, the sheet on the electrode side, with a single two-point welding. Under the same conditions of welding current, pressure and time, the tensile test and the metallographic test of the three kinds of welding samples were respectively carried out. The tensile force, the pore size and the nugget size in the nugget were analyzed. The factors affecting the welding in the production of side wall and end wall of painted stainless steel vehicles.