基于净干伸长的MAG焊接数学模型与工艺参数控制  

Mathematics Model and Process Parameters Control Based On the Genuine Length of Wire in MAG

作　　者：李春天[1] 罗怡[1] 陈方[1] 许惠斌[1] 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400050

出　　处：《重庆工学院学报（自然科学版）》2009年第6期111-115,共5页Journal of Chongqing Institute of Technology

基　　金：重庆市重点自然科学基金资助项目(CSTC2006BA4034)

摘　　要：通过对MAG焊接过程的电路进行整体分析,提出了"电源—电缆—焊丝净干伸长—熔滴—电弧"系统模型,以净干伸长为变量,根据干伸长温度分布函数推导出净干伸长压降函数的同时,采用过渡熔滴时间权重长度及金属固液态体积转换方法,建立了连续多周期过渡的液态熔滴压降子模型,而后得到电弧电压与焊接电流、净干伸长及焊矩高度的数学函数模型,对参数控制进行了模拟;并与实际的焊接过程进行了有效比较与分析.Based on the comprehensive analysis of welding circuit in MAG arc power, a system model including power, cable, wire, molten droplet and arc, is created, and according to distributed temperature function about a variable of genuine length of wire, a genuine wire-voltage function is developed. Then, a dynamic and muhicycle molten droplet-voltage mathematic model is also found with the time weight coefficient for the equivalent length of short-circuit transferring molten droplet and with the transform of wire volume from a solid to a liquid state. Besides, an arc-voltage function involving the welding current, the genuine length of wire and the height of welding torch is established logically. Meanwhile, the parameter control simulation is conducted. At last, a comparative analysis between simulation and experiment oscillograms of arc voltage and arc current is done in the paper.

关 键 词：熔滴过渡MAG 焊丝净干伸长 数学控制模型 工艺参数分析 

分 类 号：TG456[金属学及工艺—焊接]