排气阀凹槽机器人自动化堆焊工艺设计

排气阀的工作环境恶劣，为了提高其使用寿命、提高生产效率和产品质量，采用机器人自动化堆焊技术在排气阀表面堆焊一层耐磨、耐高温、耐腐蚀的合金，通过正交试验对工艺参数进行优化，采用微观组织及成分分析、性能试验及超声波检测等手段对堆焊层质量进行检测和分析．研究结果表明：当堆焊电流为120～140 A，电压为17.5～19.5 V，焊接速度为0.19～0.23 m/min，摆动3～4 mm，频率1.5～2.0 Hz时，焊缝成型及质量最好．

Exhaust valve groove robotic automation welding process design

The exhaust valve′s working environment is very harsh in the engine.In order to improve its service life,production efficiency and product quality,automation robotic welding technology is applied to surfacing welding of a layer of wear-resistant,high temperature,corrosion-resistant alloys on its surface.Orthogonal exper-iments are adopted to optimize the process parameters,and the microstructure and composition analysis,perform-ance testing,ultrasonic testing and other means are used to analyze the quality of surfacing layer.The results show that when welding current is 120 ~140 A,voltage 17.5 ~19.5 V,welding speed 0.19 ~0.23 m/min, swing 3~4 mm,frequency 1.5 ~2.0 Hz,the weld is the best.