不同零件的几何外形和尺寸是各不相同的,但其内外轮廓都是由一些简单的表面(平面、圆柱面、圆锥面以及若干成形面等)组成的,如阶梯轴是由不同直径的圆柱面、端面、轴肩面(平面)、成形面(各种沟槽,回转曲面,螺纹)等组成;箱体是由平面、孔(圆柱面)、各种圆弧过渡面(成形面)等组成。不同类别的金属切削机床的运动形式、结构都有很大的区别,但从零件表面成形的原理分析,却有很多共同点。不同的机床完成不同表面的加工,最终得到要求的零件,亦即完成零件的机械加工工艺过程。传统的零件表面成形理论对此有所描述,但过于简化,特别是对部分典型表面的成形原理缺乏统一而准确的描述,因此有必要进一步研究零件表面的发生线成形理论,使之完善并系统化。 Different parts of the geometric shape and size are different, but the inside and outside the outline is made of a number of simple surfaces (plane, cylindrical surface, conical surface and a number of forming surface, etc.), such as the ladder shaft is composed of different diameter cylinder Face, face, shoulder plane (plane), the forming surface (all kinds of grooves, rotary surface, thread), etc .; box is composed of plane, hole (cylindrical surface), a variety of arc transition surface composition. Different types of metal cutting machine tool movement, structure are very different, but the principle of forming the surface from the parts, but there are many things in common. Different machines to complete the machining of different surfaces, and ultimately get the required parts, that is, the completion of parts machining process. However, it is too simplistic, especially the lack of a uniform and accurate description of the forming principle of some typical surfaces. Therefore, it is necessary to further study the theory of forming lines on the part surface to make it perfect and system The