有些材料为黄铜、紫铜或铝的套杯类零件（如图1所示），如果采用摩擦挤压成孔，是一项行之有效的加工方法，既节约了材料，又缩短了工时及降低成本。1．加工工艺挤压工具如图2所示。把工具锥柄插入车床尾座的锥孔内，金属棒料夹持在车床的卡盘上，高速转动。首先使工具与棒料的 Some of the materials are brass, copper or aluminum cup parts (shown in Figure 1). If friction-squeezed into holes, it is an effective processing method that saves material and shortens labor hours and cut costs. 1. Processing technology extrusion tool shown in Figure 2. Insert the tool taper into the taper hole of the tailstock of the lathe and clamp the metal bar on the chuck of the lathe to rotate at a high speed. First make tools with bar stock