普通工业纯铜的物理性能和化学成分决定了它的可焊性较差。对于几十平方米面积且焊后要求冷作拉伸成型的大面积紫铜薄板焊件,存在着焊接变形大,焊接缺陷多和焊接接头机械性能低于母材等三个关键问题。通过试验和四台23～63平方米展开面积的啤酒糖化设备的生产实践,用手工钨极氩弧焊单面焊双面成型工艺,有效地控制了焊接变形,晶粒粗大及低熔 Common industrial pure copper physical properties and chemical composition of its poor solderability. For dozens of square meters of area and require cold for drawing after cold forming large area copper sheet weldment, there are three major problems of welding deformation, welding defects and weld joint mechanical properties lower than the base metal. Through the experiment and four sets of beer saccharification equipment with an area of ​​23-63 square meters, the production process of the beer saccharification equipment is controlled by the manual one-sided double-side welding process of TIG welding, which effectively controls the welding deformation, coarse grain and low melting