异形仪表圆弧齿轮滚刀齿形的设计计算

Design and Computation of Hob's Tooth Profile for Special Shape Instrument Circular Arc Gear

在异形仪表圆弧齿轮几何尺寸计算的基础上 ,按照共轭齿条齿廓的存在条件 ,提出了滚刀滚动圆半径的选择方法 ;其次 ,按照齿形法线法的原理 ,提出了异形仪表圆弧齿轮滚刀齿形的设计计算方法 ,推导了设计异形仪表圆弧齿轮滚刀齿形的全部公式 ;最后 ,以某型女式机械表的周历轮为例 ,进行了滚刀齿形的设计计算 ,结果表明 ,由此加工制作的滚刀所滚切的齿轮 。

Authors present the dimension expressions of special instrument circular arc gear, and propose a selective method of hob's rolling circle radius according as conjugate rack profiles existe or not. Then, according to the principle of tooth normal technique, authors propose a design method of hob's tooth profiles for special instrument circle arc gear, and deduced all formulae used to design hob's tooth profiles. Eventually, Authors take week\|calendar wheel used in woman's mechanical watch as an example, design the hob's tooth profiles. The gears, which is cut with the hobs designed above, can satisfy all design demands completely.