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梅山铁矿机修厂为了解决钻具波形螺纹的加工问题,利用 C618型普通车床改制成专用的波形螺纹旋风铣机床3台(内旋的1台,外旋的2台)。该机床工作可靠,效率高,工人劳动强度低,光洁度一般为▽4、▽5,螺纹根部比较圆滑。二年来已加工钎杆、钎尾和套管分别近3万、5千和5万件,合格率分别为95、98和98%。
In order to solve the processing problems of the drilling waveform wave, Meishan Iron Ore Machine Repair Factory transformed into a special wave thread whirling milling machine 3 sets (one for internal rotation and two for external rotation) by using C618 ordinary lathe. The machine work reliably, high efficiency, low labor intensity, finish is generally ▽ 4, ▽ 5, the root of the thread is relatively smooth. In the past two years, about 30,000, 5,000 and 50,000 pieces of drill rods, shank and casing have been processed with the pass rates of 95, 98 and 98% respectively.