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脉冲钨极自动氩弧焊焊接薄壁圆筒形压力容器时,虽然由于线能量(热输入)容易控制,用悬空的单面焊双面成形工艺比连续电流钨极氩弧焊容易得到Ⅰ级焊缝。但是当工件的椭圆度较大时,焊接规范很难掌握,背面焊漏高度不易控制,尤其在背面焊漏高度要求较严时很难达到设计要求。为了保证焊缝质量,采用紫铜衬垫是一种较好的方法,而紫铜衬垫的尺寸规格对产品的质量则非常重要。我们的产品是一个1.5mm厚的薄壁
Pulse TIG welding of thin-walled cylindrical pressure vessel, although easy to control because of the line energy (heat input), with a single-sided welding double-sided forming process than the continuous current TIG welding easy to get Ⅰ-level weld . However, when the ovality of the workpiece is large, the welding specification is difficult to grasp, and the height of the back surface solder joint is not easy to control. In particular, it is difficult to meet the design requirements when the height of the back surface solder joint is strictly required. In order to ensure the quality of the weld, the use of copper liner is a better method, and the size of the copper liner on the quality of the product is very important. Our product is a 1.5mm thick thin wall