复杂螺旋面钻尖刃磨原理及实现

The Principle of Complex Helicoid Grinding and It's Realization

研究了平面包络的复杂螺旋面钻尖 ,给出了钻尖结构参数的计算公式 ,研究了钻尖结构参数与刃磨参数之间的关系 ,结果表明钻尖的结构圆周后角及尾隙角随着钻头轴向推进速度与自转速度的比值 k2 的增大而增大 ,随着钻头摆动速度与自转速度之比 k1 的增大单调减小 ,随着砂轮与摆动中心的距离 H的增大而单调减小 ,随着确定前刀面位置的 p0 值的增大而单调减小 ,随着砂轮平面与钻轴的夹角θ的增大而增大 ;顶角随着θ的增大而单调增大 ,随着k1 、k2 、H的增大先减小后增大 ,随着 p0 的增大而减小 ;横刃斜角随着θ、k1 、k2 、H的增大先增大后减小 ,随着 p0 的增大而减小。

The complex helical drill points formed by planar envelope are studied.The formulas for the structure parameters of the drill are found.The relations between the grinding parameters and the structure parameters reveal that the clearance angle and the tail clearance angles increase with the k 2 which is ratio of the movement speed along drill axis to the rotation speed around the drill axis, decrease with the increase of the k 1 that is ratio of the swing speed to the rotation speed of the drill , also decrease with the increase of H the distance between the swing center to the grinder plane . As the p 0 which defines the position of the rake face of the drill increases the clearance angle decreases. With increase of the θ (the angle between the drill axis and grinding wheel plane)the clearance angle increase.The point angle of the drill get larger as the increase of the θ , gets smaller when the p 0 increase.It gets larger first and then smaller as the increase of the k 2 and the H .It decreases first and then increases with the increase of the k 1 . The chisel angle of the drill becomes smaller as the p 0 increasing and increases first and then decreases as the k 1, k 2 , H and θ increasing.An optimal method is used to solve the problem that under the given parameter specification of a drill how to find the sharpening parameters , and the results are satisfied.pointangle of the drill getlarger a