背衬砂垫焊接工艺的研究  

Research on welding technology of sand mould backing

作　　者：李明利[1] 薛龙[1] 蒋应田[2] 

机构地区：[1]北京石油化工学院,北京102617 [2]辽宁石油化工大学,辽宁抚顺113001

出　　处：《电焊机》2003年第1期42-43,56,共3页Electric Welding Machine

摘　　要：研究发明的“背衬砂垫焊接工艺”能够非常容易地实现焊透的目的,可以完全取代落后的碳弧气刨清根工艺,克服了目前常用的碳弧气刨清根所带来的缺点、弊病和不足。焊前只需用具有一定粘度的湿泥沙抹平背面的坡口,稍经干燥成形后即可在正面焊接第1道打底焊道。实验证明,由于背面有干固成形泥沙的托衬,不存在焊穿的问题,故可以选择较大的焊接电流,熔深可以达到对缝间隙根部,保证打底焊道背面的均匀成形。A welding backing with sand mould has been invented to realize welding penetration,which fully takes the place of gouging back chipping which has all kinds of shortcomings and disadvantages.It is needed to plaster the sand mould that has a certain stickiness and humidity on one groove face before welding,when it has been dried up slightly,the welding of the backing can be started on another groove face.It shows by the experiments that big welding current can be used and it cant be burn through but penetrate to the root of joint to sure the shape of the back smooth and even.

关 键 词：背衬砂垫焊接工艺 清根工艺 碳弧气刨 焊透 

分 类 号：TG44[金属学及工艺—焊接]