磨削区温度场有限元分析及仿真
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摘要
磨削加工是机械制造中重要的加工工艺,磨削技术在机械制造中占有极其重要的位置,磨削加工以其独有的特点和优势广泛应用于航天、航空等部门。其中,磨削过程中磨削热效应对工件的表面质量和使用性能影响极大,同时也会影响到砂轮的使用寿命。因此,对磨削区温度场的研究已成为非常重要的研究课题。
     本文在综述了磨削区温度场国内外研究现状的基础上,对磨削过程中磨削热的产生、不同热源引起的磨削区温度场的计算做出了理论上的分析,并简要说明有限元法在热分析中的应用、ANSYS软件在热分析中的主要步骤,最后以平面磨削为例,用有限元分析工具ANSYS软件对磨削区温度场进行了仿真分析,并得出了一些结论,具体研究内容如下:
     (1)首先对磨削加工及磨削区温度场的热源形式作了简要的介绍,并用热源法对磨削区温度场进行了分析研究,然后从理论上建立了不同热源形式温度场的数学模型,并确定了平面磨削时的热源形式。
     (2)接着介绍了有限元法在热分析中应用的理论基础,并对有限元分析软件ANSYS的热分析功能及分析的主要步骤作了简要说明,为后期工作做好准备。
     (3)接着运用ANSYS有限元分析软件建立了平面磨削区温度场的几何模型、划分网络、定义边界条件,并且运用ANSYS软件的参数化设计语言实现了热源的移动。而且通过仿真分析,得出了在不同时刻工件表面温度场的分布状况,以及各磨削参数对磨削区温度场的影响作用。利用本文的模拟方法,可以对磨削过程中的磨削区温度场进行仿真预测。
     (4)最后根据仿真的结果得出了一些结论,并对后期工作做出了一些展望。
     总之,通过理论分析,本文用ANSYS分析软件建立了可行的磨削区温度场的模拟分析方法,为磨削区温度场的分析提供了理论依据和指导,促进了有限元分析技术在磨削区温度场分析及工程中的应用。
Grinding is the important processing in machine manufacture, the technology of grinding holds the extremely important position in the machine manufacture, the characteristics and the superiority of abrasive machining which is in sole possession of by it widely applies in various departments and so on astronautics, aviation. Among them, grinding thermal reaction has enormous influence on the work piece quality of surface and operational performance, and can affect the service life of the grinding wheel. Therefore, it has become an important research topic for researchers to study the temperature field in grinding area.
     In the paper, it has introduced to the research achievement of the field domestically and abroad, and made theoretically analysis to temperature computation of grinding area causes by the different heat source, and to production of grinding hot in the grinding process. Then we briefly explained the application of finite element in thermal analysis. Finally taken surface grinding as the example, carry on the simulation and analysis to the temperature field of grinding area by ANSYS software .Main contents of the paper are summarized as following:
     (1)This thesis has simply introduced the grinding and the form of heat source in grinding area, and conducted the analysis and research with the method of heat source to the temperature field of the grinding area, then established the mathematical model of the temperature field caused by the different heat source. Finally, we have determined the form of heat source in surface grinding situation.
     (2)This thesis has also introduced the application of Finite Element in temperature field and simply introduced the function and main step of thermal analysis of finite element analysis software ANSYS.
     (3)This thesis has also established the geometry model of temperature field in surface grinding area , meshing and defines the boundary conditions by ANSYS, Finally we have realized the moving of the heat source by ANSYS Parameterization Design Language (APDL).Then we have carried the simulation on the model, and obtained distributed condition of the temperature field and acquired influence which various grinding parameter to the temperature field of grinding area.
     (4) Finally, the thesis has drawn some conclusion according to the result of simulation and made some forecasts to the task of the later period and pointed out some problems in the process, and given some suggestion for the next research.
     Finally, the paper has drawn some conclusion from the above analysis, pointed out some problems in the process, and given some suggestion for the next research.
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