在汽车配件厂里,汽缸套是经常遇见的零件,它的表面光洁度和精度要求都比较高。我厂在修配汽缸套时,过去是在精镗孔后,送到磨缸组进行磨内孔;但常出现锥形和表面光洁度不高的现象,因此往往影响到出车时间。后来,我们根据苏联高尔基城莫洛托夫汽车厂、杭州机床厂的经验,设计了如图所示的滚压工具,将过去的磨孔改为挤压加工,使用结果证明:经过滚压后的汽缸套,表面光洁度可达▽▽▽_9。同时,由于滚压的结果,使金属 In the auto parts factory, cylinder liner is often encountered parts, its surface finish and accuracy are higher. I plant in the repair cylinder liner, the past is fine boring, sent to the grinding cylinder grinding hole group; but often appear conical and surface finish is not high, so often affect the time out of the car. Later, according to the experience of Molotov Automobile Works and Hangzhou Machine Tool Works of the Gorky City in the Soviet Union, we designed a rolling tool as shown in the figure and changed the grinding hole in the past to extrusion processing. The results prove that after the rolling Cylinder liner, surface finish up to ▽▽▽ _9. At the same time, the metal is made as a result of the rolling