摘要
五轴数控加工中,机床几何精度、动态特性不匹配等因素引起的各种误差最终会表现为零件的轮廓误差,所以控制和补偿轮廓误差具有重要意义。以双转台五轴联动数控机床为对象,采用D-H法建立了数控机床运动学模型。运用运动学正解模型,揭示了刀心位置轮廓误差和刀轴方向轮廓误差的产生规律,为轮廓误差补偿控制提供了理论依据。在此基础上设计了一种轮廓误差补偿控制方法。仿真实验证明该控制方法能有效减小轮廓误差。
In five-axis CNC machining,the various errors caused by geometric precision,dynamic characteristics mismatching of the machine tools will result in the part contour errors. So it is important to control and compensate the contour errors. The kinematic model of five-axis machine tools with double rotating table was established based on D-H method. Through forward kinematics,the axial motion laws causing the tool tip contour error and the tool orientation contour error were obtained,which could provide a theoretical foundation for the contour error compensation control. At last,a contour errors control approach based on the kinematic model was developed. It has been proved to be effective through simulated experiment.
出处
《组合机床与自动化加工技术》
北大核心
2016年第6期103-105,110,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金项目"五轴联动数控轮廓误差耦合控制理论与方法研究"(51105236)
