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转换销闭器牵纵拐在运用中仅能作50°度角左右的转动,在转动时来自尖轨的压强大部份加在牵纵拐轴与孔的前后两侧,左右则较小,因而轴与孔前后两侧磨耗较为严重,并形成椭园型。在入厂大修时对其轴孔必须扩大,衬以钢套才能使用。我们伊春电务段修配工区仅有20车床中心高度200毫米,对半径为250毫米的牵纵拐扩孔是不可能的。我们制做了一种专用卡具,装上铣刀,使车床代替铣床,此种卡具使用后,不仅解决了过去根本不能加工的问
Converting the closure of the retractor in use can only make about 50 ° angle of rotation, the rotation from the tip rail pressure most of the time in the vertical axis and the hole around the retractable, the left and right is smaller, Therefore, both sides of the shaft and hole wear more serious, and the formation of oval-type. In the factory overhaul its shaft hole must be expanded, lined with steel sleeve to use. Our Yichun Electrical Services Section repair work area with only 20 lathe center height of 200 mm, radius of 250 mm impracticable reaming is impossible. We made a special tooling, fitted with milling cutter, lathe instead of milling machine, such a chuck used, not only solved the past can not be processed