一般机床上加工铜套之类零件,要有大量金属材料变成铜屑而浪费掉。针对这种情况,辽源市汽车电机厂、吉林化工机械厂两个单位的工人同志认真贯彻“自力更生,艰苦奋斗”的方针,在学习外地经验的基础上,经反复实践,研制成一种胀孔工具(刀头上镶有半圆形刀片),成功地把挤压技术运用到内孔切削加工中,并 General machine tools such as copper sleeve parts, there must be a large number of metal materials into copper scrap and waste. In view of this situation, the workers’ comrades of Liaoyuan Automobile Motor Factory and Jilin Chemical Machinery Factory conscientiously implement the policy of “relying on one’s own efforts and working hard” and, on the basis of learning foreign experiences, through repeated practice, developed a tool for expanding the bore (Cutter head mounted on a semicircular blade), the successful application of extrusion technology to the hole cutting, and