论文部分内容阅读
一、前言在车床、镗床、铣床等机床的加工中,若改变工件进给方向和刀具回转中心线间的夹角(由0°～90°),则同一刀具加工出的零件在垂直断面上将有不同的尺寸和形状,即刀具的运动轨迹在零件的被加工面上具有不同的投影,这种加工方法统称为“投影加工法”。根据投影加工原理,可以利用同一直径的刀具,在各种机床上,加工出比它直径大得多或小得多的圆弧面(如图1、图2所示),还能加工出不同尺寸的椭圆弧面。而在一般车床、镗床、铣床上车、镗内孔和外圆(夹角为0°)以及用碗形砂轮加工平面(夹角为90°),则可认为是投影加工法的两种特殊情况。下面就刀具运动轨迹在零件垂直断面上的投影为椭圆曲线的情况加以分析论述。
I. Introduction In the machining of lathe, boring machine, milling machine and other machine tools, if the angle between the feed direction of the workpiece and the centerline of the rotary tool is changed (from 0 ° to 90 °), the machined part of the same tool will have a vertical cross section Will have different sizes and shapes, namely the tool’s locus of motion on the machined surface of the part has different projections, this processing method collectively referred to as “projection processing method.” According to the principle of projection processing, you can use the same diameter of the tool, in a variety of machine tools to produce much larger or smaller than the diameter of the arc surface (Figure 1, Figure 2), but also to process different The size of the elliptical arc. In the general lathe, boring machine, milling machine on the car, boring hole and the outer circle (included angle of 0 °) and with a bowl-shaped grinding wheel machining plane (included angle of 90 °), can be considered two special projection processing method Happening. Below the tool motion trajectory in the vertical projection of the part of the elliptical curve to be analyzed.