高速CO_2焊电流波形控制系统  

Current waveform control system of high-speed CO_2 arc welding

作　　者：陈焕明[1] 曾敏[2] 曹彪[2] 

机构地区：[1]南昌航空工业学院焊接工程系,南昌330063 [2]华南理工大学机械工程学院,广州510640

出　　处：《焊接学报》2007年第1期41-45,共5页Transactions of The China Welding Institution

基　　金：江西省材料科学与工程研究中心开放基金资助项目(ZX200301011);广东省自然科学基金资助项目(031330);江西省教育厅科技项目(2006-171)

摘　　要：针对高速CO2焊焊缝成形差、飞溅大的问题,提出了一种新型的焊接电流波形控制方法,在短路阶段控制短路电流和电流上升率,在燃弧阶段采用大恒流+小恒流的两段恒流法来控制燃弧能量。根据该控制原理,设计了基于单片机控制的高速焊系统和控制软件。探讨了波控参数对焊缝成形的影响,并通过大量试验对波控参数进行优化。试验结果表明,该系统采用两段恒流控制法对电流波形实时控制,可精确控制燃弧能量,有效地改善焊接工艺性能,满足了高速CO2焊的控制要求。A new control method of welding current waveform was investigated to solve the problem of bad weld appearance and much spatter in high-speed CO_2 arc welding,which controlled the short circuit current and its rising rate in short circuit period,and adopted the two-step constant current method of big constant current and small constant current to adjust the arc energy in arc period.According to the control principle,the system based on a single chip computer and the software of the waveform control were developed.The effect of waveform control parameters on weld appearance was analyzed,and the parameters were optimized.The results show that this system can precisely control the arc energy with the two-step constant current method,and obviously improves the performance of welding process,and meets the needs of high-speed CO_2 arc welding.

关 键 词：电流波形控制 高速焊 CO2气体保护焊 单片机 

分 类 号：TG434[金属学及工艺—焊接]