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在φ125～150毫米的带法兰盘闭路截门的大活瓣上,有两个与轴心线倾斜20°的φ20毫米的斜孔。过去加工这两个斜孔装夹工件很困难。我厂阀门车间钻孔小组改进了一种钻斜孔的夹具,其结构如附图。在一个倾斜70°弯板式的夹具体1上,套入一个分度盘2,在分度盘的平面上有两个互成180°的定位孔。在夹具体上有两个分度插销20,用来分度定位。在分度盘上有梯形螺丝与心轴连接,心轴后面装有转动手柄10,当手柄转动时,使心轴做轴向移动,通过开口垫5来夹紧或松开工件。
On the large flap with flange closure of φ125 to 150 mm, there are two angled holes of φ20 mm inclined by 20 ° from the axis. In the past it was difficult to machine the two diagonal holes for the workpiece. I plant valve shop drilling team improved a hole drilling fixture, the structure as shown in the accompanying drawings. A bevelled 70 ° bent clamp body 1 is fitted with an index plate 2 having two positioning holes 180 ° in the plane of the index plate. In the clamp body has two indexing pins 20, used to index positioning. There is a trapezoidal screw on the index plate connected with the mandrel. The mandrel is equipped with a rotating handle 10. When the handle is rotated, the mandrel is moved axially and the workpiece is clamped or released through the opening pad 5.