硬质合金可转位浅孔钻优化设计及CAD原型系统研究

以提高浅孔钻加工性能、促进浅孔钻批量化生产为目标,对刀体上装有两个等边不等角六边形硬质合金可转位刀片的浅孔钻进行研究。采用向量矩阵法建立切削部分几何模型;采用经典斜角切削理论和经验公式相结合的方法建立浅孔钻的力学模型;基于上述数学模型,以径向合力与扭矩最小为优化目标建立优化程序;在给定已知条件下求出不同切削用量、不同直径条件下的浅孔钻内、外刀片的最优空间位置,并进行分析;最后,基于理论分析与实验数据,建立可转位浅孔钻的参数化CAD原型系统。

Optimization design of drills with cemented carbide indexable inserts and development of the CAD prototype system

To improve the processing properties of indexable drills and promote its mass production,the drills with two cemented carbide hexagon inserts have been researched.Vector matrix method was adopted to build up the geometric model for cutting edge,and the force model was established based on the combination of classical oblique cutting theory and empirical formulae.According to the mathematical model aforementioned,the minimization of radical force and torque was took as optimization goal and the optimization program was proposed.Based on the given conditions,the best space position of inner and outer inserts on the drill body for different cutting parameters and different drill diameters were calculated,and those results were analyzed.Finally,the parametric CAD prototype system for indexable drills was developed based on the theory analysis and experimental data.