新构形齿轮精加工刀具半径对切齿干涉的影响

新构形齿轮精加工刀具采用新切齿法,具有连续的切削刃,使得切齿过程中无冲击,刀具的制造和刃磨都非常简单.新构形刀具的半径对切齿干涉的影响较大,因此要合理设计刀具半径,避免干涉.根据该刀具的切齿原理,分析了齿廓曲面上各点在切齿过程中的轨迹和切削刃曲线,并将其向齿轮的的端截面内投影,发现齿顶处的干涉最严重;通过比较齿顶轨迹与切削刃的位置关系,研究了切直齿轮和斜齿轮时刀具半径的干涉,得到了统一的刀具半径干涉的理论公式,确定了不发生切齿干涉的最小刀具半径值,并给出了一个具体的设计实例.

Research on theory of gearing for epicycloidal bevel gear

The engaged feature of a pair of gears was determined by the geometrical characteristics of their tooth surfaces. Through an analysis of gearing theory on epi-cycloidal bevel gears, the method to examine if there exists undercut during manufacturing of epicycloidal bevel gears, the approximate formulae to calculate the gap between the convex and concave tooth surfaces in meshing so as to guarantee against the occurrence of point-contact for tooth surfaces even in maximum angle of inclination are derived in this paper. Those formula derived are simple, compact and have practical value to the design and production of epicycloidal bevel gears.

克林根贝格弧齿锥齿轮制造工艺探讨

针对克林根贝格弧齿锥齿轮副中切齿干涉产生的接触区缺陷、大齿轮大端齿形断裂、锥齿轮轴输入端断裂、齿轮副互换性差等问题,分析了产生的原因,分别从接触区调整、减小啮合冲击、原材料、过程控制等方面提出了一些改进方法。通过适当的工艺调整,可以改善接触区质量、消除干涉、提高齿轮寿命和互换性。