基于ANSYS的机床整机结构有限元分析

发布时间：2018-01-15 13:42

本文关键词：基于ANSYS的机床整机结构有限元分析　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着现代制造业的快速发展,高精度数控机床正向高速度、高效率、高精度的方向发展。而高精度数控机床整机结构的刚度变形会直接影响机床的加工精度和稳定性,因此机床整机结构的设计成为数控机床制造领域研究的重点。为此,本文以提高数控机床的加工精度为标准,研究机床整机有限元分析技术,利用此技术查看机床刀盘上指定点P在整个加工空间的刚度位移,找出该点在机床自重下、工作载荷下、热分析下以及热-结构耦合下的变形规律,为机床的误差补偿系统建立空间误差模型,从而达到提高该机床加工精度的目的。本文以大型6轴5联动加工机床的整机为研究对象,介绍一种机床整机的有限元分析方法,首先,采用该方法对机床整机进行静态、动态和热态的特性分析,了解机床整机在静态、动态和热态的结构特性。其次,利用空间分层取样法对机床的整个加工空间选取部分空间位置样点。再次,利用整机有限元分析方法对这些空间位置点进行有限元分析,收集机床刀盘上指定点P在机床自重下、工作载荷下、热分析下以及热-结构耦合下的刚度变形数据。最后,通过机床刀盘指定点P的变形数据生成曲线图,找到其在不同空间位置点的变形规律,进而评估出机床的空间误差,为今后该机床建立空间误差模型提供基础。
[Abstract]:With the rapid development of modern manufacturing, high precision CNC machine tools with high speed, high efficiency, high precision and rigidity deformation direction. High precision NC machine tool structure will directly affect the machining precision and stability, so the design of machine tool structure into a key field of manufacturing for CNC machine tools. Therefore, this paper in order to improve the machining precision of NC machine tool as the standard, the research of finite element analysis technology of machine tool, machine tool cutter displacement stiffness check specified points on the P in the whole working space by using this technique, to find out the point in the machine weight, work load, thermal deformation analysis and thermal structure coupling, the establishment of the spatial error model for error compensation system of machine tool, so as to improve the machining accuracy of NC machine. In this paper the 6 large 5 axis machine as the research object, introduces a The finite element analysis method, the whole machine first, using the method of static analysis and dynamic characteristics of machine tool, thermal, understand the machine in the static, dynamic and thermal structure characteristics. Secondly, using stratified sampling method to machine the processing space selection part of the space position of the sample point. Again, for finite element analysis of these space points using the finite element analysis method, collecting machine tool cutter on specified point P in machine weight, work load, stiffness and deformation data of thermal analysis and thermal structure coupling. Finally, through the deformation data of specified point P CNC machine cutter generated curve find the deformation law in different space position, and then evaluate the spatial error of machine tools, machine tools for the future of the establishment of spatial error provides the basic model.

【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG659

【参考文献】