铝合金脉冲MIG焊机研制  

Development of Pulsed MIG Welding Machine for Al-alloys

作　　者：包晔峰[1] 

机构地区：[1]铁道部戚墅堰机车车辆工艺研究所,常州213011

出　　处：《焊接学报》2000年第1期90-93,共4页Transactions of The China Welding Institution

摘　　要：铝合金在高速列车制造中 ,占有很重要的地位。铝合金因其独特的物理、化学性能对MIG焊有特殊的要求。本文研制的脉冲MIG焊机 ,主电路采用大功率晶体管作为主控元件 ,从铝合金MIG焊特点出发 ,采用电流脉冲技术控制铝合金MIG焊熔滴过渡行为 ,在整个焊接电流范围内 ,均得到小滴射流过渡 ,电弧挺度好 ,熔滴过渡均匀。脉冲参数采用一元化调节 ,操作方便 ,只要给定送丝速度 ,其它的脉冲参数均由焊机内部自动产生 ,实现了自适应控制。铝合金MIG焊在不同的状态有不同的动特性要求 ,据此本文提出了“自调节动特性”的概念 ,自调节动特性由动态电子电抗器和短路电流控制器来实现。该机具有脉冲送丝功能 ,有效控制了焊接熔池 ,得到了较好的焊缝成形。Al alloys are major materials in fabricating high speed locomotive and rolling stock.Al alloys have special requirements on MIG welding due to their unique physical and chemical properties.A new welding machine was developed and it generated pulsed current to control the mode of metal transfer in Al alloys MIG welding.During the entire range of welding current,the droplet transfer was achieved.As a result of this,welding arc had a good stiffness and droplet transfer was very stable.Since pulse parameters were controlled only by one knob,the operation of the machine was very easy.Once the wire feed speed was set,other parameters were established automatically in the welding machine.Because the Al alloys MIG welding had different dynamic requests in different states,the “Self Adjusted Dynamics” concept was put forward,which was achieved through the dynamic electronic inductor and the short circuit current controller.In addition,the machine could feed wire at a pulsed speed,so that puddle was well controlled and a smooth bead was formed.

关 键 词：铝合金 脉冲 MIG焊 研制 MIG焊机 

分 类 号：TG434.5[金属学及工艺—焊接]