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椭圆形齿轮广泛应用于纺织机械中的织布机和并条机、自动包装机、变压器的抽头转换以及某些计算机和机床上。本文的目的是讨论在万能铣床上,利用分度头和渐开线成形齿轮刀具加工准椭圆形齿轮的方案,为了简化加工过程及提高效率,还可以使用由两个互相垂直的拖板构成的夹具。所谓准椭圆就是用简单的四心圆弧联接成的近似椭圆。考虑到图1中的距离M和N及其几何关系,由椭圆长短轴端点所作四段圆弧联接成椭圆的形成过程中可以求出偏差的极限值。对于给定的椭圆偏心距e。M
Oval gears are widely used in looms and draw frames in textile machinery, automatic packaging machines, tap changers in transformers, and in some computers and machine tools. The purpose of this paper is to discuss a solution for machining quasi-elliptical gears with indexing heads and involute forming gear tools on a universal milling machine. To simplify the machining process and increase efficiency, it is also possible to use a machine consisting of two mutually perpendicular pallet Fixture. The so-called quasi-elliptical is a simple four-heart arc into the approximate ellipse. Taking into account the distances M and N in Figure 1 and their geometrical relationships, the limit values of the deviations can be found during the formation of an ellipse by joining four sections of arc ends of the elliptical long and short axes. For a given elliptical eccentricity e. M