3PTT-2R串并联数控机床动力学耦合特性研究

发布时间：2018-04-14 02:34

  本文选题：串并联机床 + 奇异约束条件　； 参考：《农业机械学报》2015年12期

【摘要】：为较好地保证机床动力学特性和在复杂曲面加工过程中有较好的加工精度,基于机构运动和受力规律,针对设计的3并联2串联混合型数控机床进行动力学耦合问题研究。提出了一种联合应用凯恩方程及拉格朗日方程的动力学解耦方法。建立了机床串联及并联部分完整的动力学耦合模型并确定了耦合因素。进行了复杂曲面零件的动力学耦合仿真,仿真结果表明:建立的动力学耦合模型是正确且可行的,符合运动学及受力规律。进行了复杂曲面零件的切削加工实验,机床运行平稳且速度较快,无较大奇异位置及耦合误差。表面粗糙度结果反映了机床的运动精度,干涉条纹证明了机床受力均匀。实验结果表明理论分析正确,该研究方法和过程不仅能够真实、主动和有效地解决机床动力学耦合问题,而且可为后续机床精确伺服控制提供基础。
[Abstract]:In order to ensure the dynamic characteristics of the machine tool and better machining accuracy in the process of complex curved surface machining, the dynamic coupling problem of the designed 3 parallel 2 series hybrid NC machine tools is studied based on the mechanism motion and force law.A dynamic decoupling method combining Kane equation and Lagrange equation is proposed.A complete dynamic coupling model of machine tool in series and parallel is established and the coupling factors are determined.The dynamic coupling simulation of complex curved surface parts is carried out. The simulation results show that the dynamic coupling model is correct and feasible, and accords with kinematics and force law.The machining experiments of complex curved surface parts are carried out. The machine tool runs stably and quickly, and has no big singular position and coupling error.The results of surface roughness reflect the motion accuracy of the machine, and the interference fringes prove that the force of the machine is uniform.The experimental results show that the theoretical analysis is correct, and the research method and process can not only solve the dynamic coupling problem of machine tools in real, active and effective manner, but also provide the basis for the precise servo control of the subsequent machine tools.
【作者单位】： 长春工业大学应用技术学院;上海交通大学机械与动力工程学院;长春工业大学汽车工程研究院;
【基金】：国家自然科学基金资助项目(61374138) 教育部新世纪人才资助项目(NCET-12-0731) 吉林省教育厅“十二五”科学技术研究资助项目(2012111)
【分类号】：TG659
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本文编号：1747356