摘要
介绍了一种基于微束等离子焊的直接金属快速成形方法,采用正交试验方法对成形工艺参数对截面宽高比的影响规律进行了研究,并获得了优化的工艺参数.研究结果表明,用宽高比大的成形轨迹制作的零件质量比用宽高比小的成形轨迹制作的零件质量高,而且脉冲电流、送丝速度、占空比、扫描速度和离子气流量对宽高比有显著影响.对采用优化参数制作的零件进行了表面平整度、抗拉强度、延伸率的测试,其测试数据明显优于未经优化参数制作的零件.
A direct metal rapid prototyping process based on micro-plasma arc welding is presented. The impact of the ratio of width to height of the deposited track cross-section （R） on part quality is investigated. Taguchi method is adopted to analyze the effect of each process parameter on R, and the optimized process parameters are obtained. The results show that the quality of the parts with larger R is better than that with smaller R, and the pulse current, wire-feeding speed, scanning speed and plasma gas flow rate exert significant effects on R. The overlapped surface smoothness, tensile strength and elongation of the parts fabricated with the optimized parameters are measured to show the obviously better performances than those of the parts in the ordinary technological process.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2006年第5期568-572,共5页
Journal of Xi'an Jiaotong University
基金
教育部高等学校全国优秀博士学位论文专项基金资助项目(200026)
关键词
快速成形
微束等离子焊
正交试验
优化参数
rapid prototyping
micro-plasma arc welding
Taguchi method
parameters optimization
