圆形铝棒的挤压加工可利用支承在尾座上的活顶尖顶住心轴,用大量煤油或轻油的混合剂冷却工件。未加辅助密封时,混合物通过本密封进入顶尖,将油脂冲洗掉,顶尖很快损坏。加工是在4000rpm高速下进行,因而在接触面处产生大量的热。此时,在接触面添加润滑剂是相当麻烦的,往往会造成活顶尖因快速磨损 Round aluminum rod extrusion processing can use the living roof supported on the tailstock to withstand the mandrel, with a large amount of kerosene or light oil mixture cooling the workpiece. Without the secondary seal, the mixture enters the tip through the seal, flushes away the grease, and the tip breaks quickly. Processing is performed at a high speed of 4000 rpm, so a large amount of heat is generated at the contact surface. At this point, adding lubricants at the contact surface is quite troublesome and tends to result in rapid wear of the live center