钻尖直线刃后刀面的砂轮磨削轨迹算法研究

Research on Wheel Grinding Trajectory Algorithm of Straight Blade Flank Faces of Drill Tips

为了提高钻尖后刀面的加工精度和保证砂轮磨削姿态的灵活性,研究了钻尖直线刃后刀面数控磨削过程中的砂轮轨迹计算方法。定义了钻尖直线刃后刀面的结构参数,建立了钻尖直线刃线及后刀面的数学模型;定义了钻尖直线刃后刀面的坐标系和砂轮基准磨削姿态;在此基础上,采用坐标变换矩阵描述砂轮运动方式,借助运动学原理推导了基于工件坐标系的砂轮磨削位置和姿态的计算方法。该方法保证了钻尖直线刃后刀面的精度,可灵活调整砂轮磨削姿态。基于VC++环境开发了计算程序,并进行仿真加工验证,验证了算法的有效性。

In order to improve the machining accuracy of the flank faces of drill tips and ensure the flexibility of the grinding position and attitude of the wheels,a method of solving the grinding wheel trajectory of the straight blade flank faces in the CNC grinding processes was proposed.The structural parameters of straight blade flank faces of drill tips were defined,and the mathematical model was es-tablished.The coordinate of the straight blade flank faces of drill tips and the datum grinding attitude of the wheels were defined.Then,the coordinate transformation matrix was used to describe the mo-tion mode of the wheels,and the method of the grinding positions and attitudes of wheels was deduced based on the workpiece coordinate system by means of the kinematics principle.With the proposed method,the precision of straight blade flank faces of drill tips may be ensured.Meanwhile,the grind-ing positions and attitudes of the wheels may be flexibly adjusted.The computational program was de-veloped based on VC++,and the effectiveness of the algorithm was verified with machining simulations.