直线导轨副静刚度试验分析及影响因素研究

【作者】 张伟；

【导师】 韩军； 王禹林；

【作者基本信息】 南京理工大学 ， 机械工程（专业学位）， 2015， 硕士

【摘要】 作为重要的滚动功能部件,滚动直线导轨副被广泛的应用于数控机床行业中。静刚度作为导轨副选用时考虑的重点参数之一,对数控机床的承载能力以及加工精度都有直接的影响。本论文重点针对已有滚动直线导轨副静刚度试验台,完成调试工作以及编写配套使用的测控软件,基于静刚度试验数据进行误差分析与算法改进,通过仿真研究导轨副静刚度的影响因素,为进行导轨副的高刚性设计提供基础。从传动原理、测控系统等方面介绍已有的滚动直线导轨副静刚度试验台,同时介绍了适用于该试验台的样件要求与配套使用的工装组件。并基于该试验台,介绍导轨副静刚度试验方法以及额定静载荷试验方法。在已有导轨副静刚度试验台的基础上,基于测试规范以及完备性、稳定性等方面要求,设计了与试验台配套使用的测控软件,详细介绍其中各功能模块设计,并介绍了软件的使用方法。详细推导了导轨副四种静刚度试验计算方法,并针对现有的导轨副静刚度试验数据,分析了垂直静刚度试验中变形计算误差来源,并尝试进行误差建模求解误差补偿项,最终给出减小误差的建议措施,分析并改进了其他三种静刚度试验的角变形计算方法。使用ANSYS Workbench对30规格滚动直线导轨副的垂直静刚度进行了有限元仿真,研究了滚珠数目、滚珠直径、初始接触角、曲率比以及材料等因素对于导轨副静刚度的影响,并据此提出了提高导轨副静刚度的方法,为导轨副的高刚性设计提供了基础。更多还原

【Abstract】 Liner rolling guide has been widely used in CNC machine tools as a kind of rolling component. Static stiffness, which is one of the most important parameters considered when selecting guide, plays a important role in carrying capacity and machining accuracy of CNC machine tools. This paper concentrates on control software design for the static stiffness test-bed, error analysis and algorithm improvement based on the experiment data, and influencing factors research through finite element simulation, which provides basis of the research on approach to improve the static stiffness of linear rolling guide.The static stiffness test-bed is introduced from the point of view of drive principle, measuring and controlling system, requirements for testing guides, and loading equipments. In addition, the static stiffness test method is also introduced based on this test-bed.On the basis of the static stiffness test specification for linear rolling guide and requirements of integrity and stability, the measuring and controlling software for the test-bed is developed, which includes several function modules. Besides, the operating method of the software is also introduced.The calculating formula for four kinds of static stiffness experiments is derived according to the test specification and the loading equipments. The experiment data is analyzed to compensate error and improve the calculating formula.The finite element simulation of the static stiffness of linear rolling guide is finished with ANSYS Workbench. Based on the simulation results, do research on the influence of the number, diameter and material of rolling balls, curvature ratio and initial contact angle on the static stiffness, which results on the methods to improve the static stiffness of linear rolling guide.更多还原