期刊论文

Simulation of effect of welding torch tilt on arc shape of overlapping deposition of wire arc additive manufacturing

中文

材料热处理学报

1009-6264

2020

41

8

148-156

10.13289/j.issn.1009-6264.2020-0076

51705287:国家自然科学基金 51475265:国家自然科学基金 51775308:国家自然科学基金

本校为其他机构

针对电弧增材制造搭接熔积不对称的熔积空间导致的非对称电弧形态、等离子流态以及差的气体保护效果,提出了采用焊枪偏转的方式对搭接熔积非对称电弧形态进行调控,并建立搭接熔积电弧的三维数值模型,模拟了普通搭接熔积和3种焊枪偏转角度情况的搭接熔积电弧。数值模拟结果表明,焊枪偏转10°、20°和30°对搭接熔积电弧不对称的温度场和压强分布均有影响。其中焊枪偏转10°和20°对保护气流“内陷”现象均有改善作用,焊枪偏转20°对电弧温度场、压强分布以及保护气的平衡效果最佳,而焊枪偏转30°使气体保护效果变差。数值模拟的电弧形貌与实验拍摄的电弧形貌照片吻合良好。

Aiming at the asymmetric arc shape, asymmetric plasma flow and the poor gas shielding effect caused by the asymmetric deposition space of overlapping deposition of wire arc additive manufacturing (WAAM) process, this paper put forward using a welding torch tilt method to adjust the asymmetrical arc shape and plasma flow of overlapping deposition, and a three-dimensional numerical model of overlapping deposition arc was established to simulate the conventional overlapping deposition and three kinds of welding torch tilt overlapping deposition. T...