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有螺旋面的工件很多,如螺纹、螺杆、螺旋齿轮、螺旋泵及各类螺旋齿刀具(钻头、螺旋铰刀、铣刀)等。指状刀具一般都用来加工截形对称的螺旋面。加工时,指状刀具安放在螺旋面的齿槽中,它的回转轴与工件螺旋面截形的对称轴重合。刀具作回转运动,工件作参数为P_z(导程)的螺旋运动,此时,刀具切削刃回转面相对于工件螺旋槽的接触线不是平面曲线,而是一条空间曲线,因此,刀具回转面的轴向截形不同于工件任何剖面中的截形,而应是该空间曲线绕刀具轴线回转所得回转面的轴向截形。本文介绍一种比较简单的计算方法,供参考。
There are many helical surface of the workpiece, such as thread, screw, helical gears, helical pumps and various types of helical teeth cutter (drill, screw reamer, cutter) and so on. Finger knives are generally used to process the truncated symmetrical helical surface. During processing, the finger-shaped tool is placed in the tooth groove of the helical surface, and its rotary axis coincides with the symmetry axis of the workpiece helical surface truncation. The tool is used for rotary motion. The workpiece is made into a helical movement with P_z (lead). In this case, the contact line of the tool cutting edge turning surface relative to the workpiece helical groove is not a plane curve, but a spatial curve. Therefore, the axis of the tool turning surface The truncation to the truncation differs from any profile in the workpiece, but rather the axial truncation of the revolving surface from which the space curve revolves around the tool axis. This article describes a relatively simple method of calculation for reference.