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现在介绍一种在平面磨床上刃磨中心钻用的夹具。这夹具的结构如附图所示。1是底座,在底座上焊有角铁2;角铁的角度为α,它等于中心钻锥体角的1/8。中心钻插在套筒3的孔内,用螺钉4固定。在套筒3内装有带手轮6的挡块5。8是滚子,攻有螺丝孔,用螺丝9固定在套筒3上;滚子3的另一端嵌在套筒7的螺旋槽内。工作时,摇动手轮6,使挡块5推动套筒3向前移动,而固定在套筒3上的滚子8就沿着套筒7上的螺旋槽移动。这样,套筒3就带着中心钻同时作旋转和直线的运动。移动的大小是根据螺
Now introduce a sharpening center drill on a surface grinder with a fixture. The structure of this fixture is shown in the attached figure. 1 is a base, on the base is welded angle iron 2; Angle iron angle α, which is equal to the central drill cone angle 1/8. The center drill is inserted into the hole of the sleeve 3, and is fixed with the screw 4. In the sleeve 3 is equipped with a stopper with a hand wheel 6 5.8 is a roller, tapping screw hole, with a screw 9 is fixed to the sleeve 3; the other end of the roller 3 embedded in the spiral groove 7 sleeve . In operation, the hand wheel 6 is shaken so that the stopper 5 pushes the sleeve 3 to move forward, and the roller 8 fixed on the sleeve 3 moves along the spiral groove on the sleeve 7. In this way, the sleeve 3 is simultaneously rotated and linearly moved with the center drill. The size of the move is based on the snail