SK7732数控蜗杆磨床主轴静动态特性分析及结构优化
发布时间：2018-08-06 09:12
【摘要】：随着数控机床技术的不断发展,对机床的加工精度、稳定性等主要参数的要求也越来越高。数控磨床作为重要的机械加工设备,其主轴的性能直接影响磨床的加工性能。为此,本文以SK7732数控蜗杆磨床砂轮架主轴为例,借助有限元软件ANSYS,研究了磨床砂轮架主轴的轴承刚度、轴承型号及轴承跨距对主轴静动态特性的影响规律,完成的主要工作如下:(1)以SK7732数控蜗杆磨床砂轮架主轴为研究对象,建立了两组弹簧阻尼和六组弹簧阻尼的有限元模型,对两种有限元模型进行模态分析,得到了一种磨床砂轮架主轴合理有效的有限元建模方法。(2)以两组弹簧阻尼的有限元模型为研究对象,在轴承径向刚度、轴承型号和跨距变化的情况下,对比了主轴静变形和固有频率的变化,得出了主轴结构参数变化对其静动态特性的影响规律。(3)利用有限元结构优化功能,在体积最小和二阶振幅最小的条件下,分析了结构参数的变化对静变形和固有频率的影响,得出了主轴的最优结构参数。本文的研究对于磨床制造企业提高磨床砂轮架主轴的性能和制造效率,提供了一定的理论依据;且对节约生产成本提供了一定的理论基础。
[Abstract]:With the development of NC machine tool technology, the requirements of machining accuracy and stability of machine tools are becoming higher and higher. CNC grinder as an important machining equipment, its spindle performance directly affects the processing performance of grinder. For this reason, taking the spindle of SK7732 worm grinding machine as an example, with the aid of finite element software ANSYS, the influence of bearing stiffness, bearing type and bearing span on the static and dynamic characteristics of spindle is studied. The main works are as follows: (1) taking the spindle of SK7732 worm grinder as the research object, the finite element models of two groups of spring damping and six groups of spring damping are established, and the modal analysis of the two finite element models is carried out. A reasonable and effective finite element modeling method for grinding wheel frame spindle is obtained. (2) taking the finite element model of two sets of spring damping as the research object, under the condition of the change of bearing radial stiffness, bearing type and span, The static deformation and natural frequency of the spindle are compared, and the influence of the structural parameters on the static and dynamic characteristics of the spindle is obtained. (3) under the condition of minimum volume and minimum second order amplitude, the optimization function of finite element structure is used. The influence of structural parameters on static deformation and natural frequency is analyzed, and the optimum structural parameters of spindle are obtained. The research in this paper provides a theoretical basis for improving the performance and manufacturing efficiency of grinding wheel frame spindle in grinding machine manufacturing enterprises, and provides a certain theoretical basis for saving production cost.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG596
[Abstract]:With the development of NC machine tool technology, the requirements of machining accuracy and stability of machine tools are becoming higher and higher. CNC grinder as an important machining equipment, its spindle performance directly affects the processing performance of grinder. For this reason, taking the spindle of SK7732 worm grinding machine as an example, with the aid of finite element software ANSYS, the influence of bearing stiffness, bearing type and bearing span on the static and dynamic characteristics of spindle is studied. The main works are as follows: (1) taking the spindle of SK7732 worm grinder as the research object, the finite element models of two groups of spring damping and six groups of spring damping are established, and the modal analysis of the two finite element models is carried out. A reasonable and effective finite element modeling method for grinding wheel frame spindle is obtained. (2) taking the finite element model of two sets of spring damping as the research object, under the condition of the change of bearing radial stiffness, bearing type and span, The static deformation and natural frequency of the spindle are compared, and the influence of the structural parameters on the static and dynamic characteristics of the spindle is obtained. (3) under the condition of minimum volume and minimum second order amplitude, the optimization function of finite element structure is used. The influence of structural parameters on static deformation and natural frequency is analyzed, and the optimum structural parameters of spindle are obtained. The research in this paper provides a theoretical basis for improving the performance and manufacturing efficiency of grinding wheel frame spindle in grinding machine manufacturing enterprises, and provides a certain theoretical basis for saving production cost.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG596
【参考文献】
相关期刊论文 前10条
1 刘道钱;陈涛;沈顺成;王s，
本文编号：2167246
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