我厂在向大连机床厂等兄弟单位学习的基础上,为了提高生产效率和保证丝杠质量,从一九六六年开始对旋风铣削加工及机床进行研究和试制。我们以原有的C620-1车床铸件进行改装设计。经过十个多月的时间,研制了两台旋风铣床,于一九六七年三季度正式投入生产使用。从开始使用到现在, On the basis of learning from Dalian Machine Tool Plant and other fraternal units, our factory began to research cyclone milling machines and machine tools in trial production in 1966 in order to improve production efficiency and ensure screw quality. We use the original C620-1 lathe castings for conversion design. After more than ten months, two cyclone milling machines were developed and put into production in the third quarter of 1967. From the beginning to use now,