排气阀凹槽机器人自动化堆焊工艺设计

摘要

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．%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.