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这种夹具系供由阿基米德螺线曲线族形成的自动车床凸轮类零件各段划线之用。该夹具由轻合金、塑料或硬木制的壳体组成。壳体内装有套筒2,作为带手把5的调整杆4的插槽用。供书写装置8(铅笔或金属画线针)用的、带套筒11的活动滑块12可沿上述壳体的纵槽状导轨移动。活动滑块上固定有可绕轴旋转的滚子10,滚子上紧固着牢固的线6的一端。线6的另一端紧贴在套有可换线轴3的调整
This fixture is for Archimedes spiral family formed automatic lathe cam parts of the various sections of the line. The fixture consists of a light alloy, plastic or hardwood housing. The casing is provided with a sleeve 2 for use as a socket for the adjusting rod 4 with a handlebar 5. The movable slider 12 with the sleeve 11 for the writing device 8 (pencil or metal drawing needle) is movable along the longitudinal groove-shaped guide of the housing. The movable slider is fixed with an axis-rotatable roller 10, and the roller is fastened with one end of a firm thread 6. The other end of the wire 6 is closely attached to the sleeve with the spool 3 can be adjusted