双孔焊片(如图1),使用的范围广,生产数量大,一般采用铆接或连续引伸法制造。前者工序多,质量不高;后者模具结构复杂,工具制造精度高,冲压生产中由于连续引伸工序多,工具易于损坏。采用冷挤压法是一种先进工艺,模具结构如图2所示。毛坯(图3)以两孔定位放入导销1中,凹模 Double-hole welding pieces (Figure 1), the use of a wide range of large quantities, the general use of riveting or continuous extension of manufacturing. The former process and more, the quality is not high; the latter mold structure is complex, high precision manufacturing tools, stamping production due to continuous extension of the procedure, the tool is easy to damage. Cold extrusion method is an advanced technology, mold structure shown in Figure 2. Billet (Figure 3) with two holes positioned into the guide pin 1, the die