铝合金电弧增材制造成形质量研究

基于机器人电弧填丝增材制造成形技术,进行了铝合金零件的成形表面不平整问题的分析及改善方法的试验探究。分析了CMT焊接技术的增材成形效果,以及应用在不同焊道时对成形质量产生的影响;分别探究了起弧与熄弧参数、层间轨迹方式、层间冷却时间等因素对成形质量的影响及改善方法。增材制造翼肋零件中,层间沉积中采用了焊道表面测量,再进行铣削加工的方式,作为进一步探究提高成形质量的试证。结果表明,加大起弧电流、降低熄弧电流,往复的层间轨迹方式及不同层间的冷却时间等方法可以提高零件的成形质量。

Research on forming quality of wire and arc additive manufacturing for aluminum alloys

Based on the robot wire and arc additive manufacturing technology, the problem of forming surface out-of-flatness of aluminium alloy parts was analyzed and the improvement method was explored. The forming effect of CMT welding technology and the effect of different beads on forming quality were analyzed. The effects of striking and extinguishing parameters, interlayer trajectory and interlayer cooling waiting time on the forming surface problems and the improvement methods were explored respectively. In the additive manufacturing of wing rib parts, the surface measurement of weld bead and milling were used in the interlayer deposition, as a test to further explore the improvement of forming quality. The results showed that the forming quality of parts could be improved by increasing arcing current, decreasing arc extinguishing current, reciprocating interlayer trajectory and interlayer cooling waiting time between different layers.