滚齿切削厚度仿真计算

为了解决滚切力模型在应用中瞬时几何边界参数的提取问题,提出一种基于三维实体造型技术的滚齿切削厚度仿真计算方法.该方法考虑未变形切屑是滚刀扫掠几何实体与工件几何实体的交集,包含几何边界条件信息.首先通过布尔减运算得到未变形切屑,然后通过瞬时刀齿前刀面与切屑几何实体进行求交运算,得到包含切削范围信息的由样条曲线所构造成的CWE(cutter/workpiece engagement),进而在其上进行切削厚度的提取.该方法的实现为动态滚切力的精确预测奠定了基础.

Simulation Calculation of Undeformed Chip Thickness in Gear Hobbing

To solve the instantaneous geometric boundary parameters applied in hobbing force model， a method of simulation calculation of undeformed chip thickness based on the 3D solid modeling was presented. The undeformed chip， which is the intersection between swept volume of hob and workpiece， contains the information of geometric boundary parameters. Boolean operation is used to acquire the undeformed chip. By means of intersection operations on the rake plane of instantaneous hob teeth and the geometric entities of chip， CWE (cutter/workpiece engagement) that includes the information of cutting range constructed by the splines， was obtained. The undeformed chip thickness was extracted from CWE. This method lays a foundation for the precise prediction of dynamic hobbing force.