铝合金双脉冲MIG焊熔宽控制  

Weld width control of double pulsed MIG welding for aluminum alloy

作　　者：黄健康[1] 石玗[1] 卢立晖[2] 朱明[2] 樊丁[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050 [2]兰州理工大学甘肃省有色金属新材料重点实验室,兰州730050

出　　处：《焊接学报》2011年第5期13-16,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50675093)

摘　　要：针对铝合金中厚板恒定规范焊接过程中的热积累效应强、焊缝熔宽逐渐变宽甚至出现焊塌等问题,提出了基于视觉实时传感的熔宽变化,并通过改变周期性双脉冲中的高能脉冲时间即双脉冲占空因数来调节热输入进行熔宽控制的方法,并建立了基于Labview的熔宽视觉传感和xPC Target实时目标环境的快速原型控制系统来进行闭环控制.结果表明,所建立的视觉传感及快速原型系统具有很好的快速响应性能.采用可调的周期性双脉冲工艺可有效减少母材热输入,使焊缝熔宽得到有效的控制,且焊缝成形美观.Based on visual real-time sensor,a method to control the weld width was proposed to solve the problems of weld appearance in the welding process of aluminum alloy plate with constant welding parameters,which include the weld width broadening and bead subsidence due to the strong heat accumulation effect.The width was controlled by the heat input,which was realized by changing the duty cycle of the double pulses.The rapid prototype system with close loop control was established based on Labview visual sensor and xPC target real-time object environment.The results show that the system of visual sensor and rapid prototype have quick response performance.The heat input can be effectively reduced by regulating the procedure of the cyclical double pulses,the weld width is well controlled,and weld appearance is good.

关 键 词：双脉冲MIG焊 熔宽控制 快速原型 

分 类 号：TG409[金属学及工艺—焊接]