短路过渡焊接焊丝干伸长传感器  

Through-the-Wire Sensor of Short-circuit CO_2 Welding

作　　者：鲍云杰[1] 朱志明[1] 吴文楷[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《焊接学报》2001年第3期55-58,共4页Transactions of The China Welding Institution

摘　　要：对波形控制短路过渡CO2 焊接焊丝干伸长传感器进行了研究。在对焊丝干伸长传热和电阻以及熔滴的几何形状和电阻特性进行理论分析的基础上 ,建立了一套基于MotorolaMC6 8HC11A1单片机的焊丝干伸长检测及处理系统。短路期间的焊丝干伸长近似为焊炬至工件的距离 ,因此焊丝干伸长可作为确定焊炬高度的传感器 ,进而实现焊缝跟踪。对检测数据的处理结果表明 ,在短路中期 ,焊接脉冲电流恒定 ,焊炬与工件间的电压信号与焊丝的干伸长度成正比。传感器的实际检测精度可以达到± 0 .4mm ,完全能够满足CO2 焊接的焊炬高度跟踪和焊丝能量补偿控制的要求。Through the wire sensor of the waveform controlled short circuit CO 2 welding is studied in this paper.A system designed for wire extension signal measure and process is established based on the MCU (Motorola MC68HC11A1) after theoretical analysis of wire extension heat transfer and its resistance,molten drop profile and its resistance properties.During the period of short circuit,the wire extension is approximate the distance from the welding torch to work piece,so that it can be used as the sensor for determining the height of welding torch,and for realizing the seam tracking.The processing results show that the short circuit voltage between the torch and work piece is in direct proportion to the wire extension,when welding current keeps constant during the medium term of short circuit.The actual measure accuracy of the sthrough the wire sensor can reach ±0.4mm,therefore the requirements of torch height control and wire energy compensation control of CO 2 welding can be met perfectly.

关 键 词：焊丝干伸长传感器 短路过渡 焊炬高度 波控CO2焊接 

分 类 号：TG409[金属学及工艺—焊接] TG434.5