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以Al Si-5焊丝为填充材料,对AA6061-T6铝板和DP590镀锌钢板的冷金属过渡(CMT)点塞焊工艺进行了研究。通过采用三因素(送丝速度、焊接速度、弧长修正)三水平的正交试验,筛选出最优的工艺参数组合,并通过拉伸试验检测最优工艺参数下的焊接质量,最后用单因素分析法,分析了送丝速度对焊接成形及焊接强度的影响。结果表明:送丝速度对拉伸载荷的影响最大;最优工艺参数组合方案下铝钢薄板焊接效果良好,拉伸载荷达到4.53 k N;当送丝速度由5.0 m/min增加到6.0 m/min时,拉伸载荷先随着送丝速度的增加而增大,但当送丝速度增加到一定程度时拉伸载荷开始减小;随着送丝速度的增加,焊点的直径不断增大,而焊点的高度缓慢减小。
Cold-metal transition (CMT) point-plug welding process of AA6061-T6 aluminum plate and DP590 galvanized steel was studied with Al Si-5 wire as filling material. Through the orthogonal experiment with three factors (wire feeding speed, welding speed and arc length correction), the optimum process parameters were screened out and the welding quality under the optimal process parameters was tested by the tensile test. Finally, Factor analysis method, the influence of wire feeding speed on the welding forming and welding strength was analyzed. The results show that the wire feeding speed has the most important influence on the tensile load. The welding process of the aluminum plate under the optimal process parameters combination is good, with a tensile load of 4.53 kN. When the wire feed speed increases from 5.0 m / min to 6.0 m / Tensile load first increases with wire feed speed, but when the wire feed speed increases to a certain extent, the tensile load begins to decrease. With the increase of feed wire speed, the diameter of weld increases , While the solder joints slowly decrease the height.