【作者】 贺德昂；

【导师】 宋宝韫； 于欣；

【作者基本信息】 大连铁道学院 ， 材料加工工程， 2003， 硕士

【摘要】 连续挤压技术已在铝、铜型材加工和电线电缆包铝等方面得到了广泛的应用，大连铁道学院研制的SLJ350型连续挤压机是我国目前连续挤压和包覆设备的主流机型。SLJ350机型问世以来，经不断的改进，挤压轮、轴套和主轴等主轴系统部件的寿命有了很大的提高，但是离进口设备的寿命尚有一段距离。为了进一步改进设计，提高性能，延长使用寿命，增强市场的竞争能力，需要采用现代设计方法对连续挤压机主轴部件的受力情况和机械强度进行一次系统的分析计算。为此，本文采用有限元法对挤压轮、轴套和主轴等主要零件进行了较详尽的数值模拟。 本文采用I-DEAS软件作为计算机辅助分析的工具，基于弹塑性有限元理论和传热学理论，建立了工作状态下主轴系统的有限元分析方法及技术处理方法。论文共分为四大部分： 1．介绍了连续挤压法和有限元法的原理及应用，阐述了使用有限元法对连续挤压机主轴系统进行分析计算的必要性、可行性及优越性。 2．针对进行主轴系统有限元分析所需的理论基础做了说明。 3．推导了连续挤压时变形力的计算公式，确定了工作状态下主轴系统所受载荷的大小及载荷分布规律，为建立边界条件奠定了基础。 4．在I-DEAS软件中使用手动创建节点单元的方法建立起主轴系统的整体有限元模型，并对其进行了线性静态分析，得到了主轴系统各部件在机械载荷作用下的应力应变分布。其次还针对挤压轮进行了温度场分析，最终得到了挤压轮由于温度作用所引起的温度应力。 本文首次针对主轴系统进行了整体结构的有限元分析，运用I-DEAS软件中的间隙单元来模拟系统内部的弹性接触问题，所得的各部件应力应变场能够较为真实地反映实际工况下各部件的应力应变分布，从而为判定零件的机械强度，并为今后设计同类产品提供了参考。更多还原

【Abstract】 Continuous extrusion technology has been used widely in producing aluminium and copper wires and cables covered by aluminium and so on. SLJ350 continuous extrusion machine which is manufactured by DaLian Railway Institute is the main machine type of continuous extrusion and clad in China. After this machine type came out,by meliorating continually,the life of the principle shaft system parts such as extrusion wheek shaft sleeve and principle shaft has improved greatly, but is less than the life of import equipment.In order to improve on design, increase performance, extend the life and boost up competition ability, it is necessary that the load and mechanism intensity of the principle shaft system parts is analyzed. Therefore, the main parts including extrusion wheel shaft sleeve and principle shaft have been simulated by FEM..Based on elastic FEM theory and heat transfer theory, the author uses I-DEAS software as a CAE tool, builds the finite element analysis method and techniques of the principle shaft system on work. This paper has four parts:1 .Introduce the theory and application of continuous extrusion method and FEM,expatiate the necessity feasibility and superiority of using FEM to analyze the piriciple shaft system of the continuous extrusion machine.2.Explain the basic theory that will be used in analyzing the principle shaft system by means of FEM.3.Deduce the calculate formula of deformation force, ascertain the value and the distributing rule of load when the principle shaft system is working, make the basis of building boundary condition.4.1n I-DEAS software the author establishes the whole finite element model by manually creating nodes and elements, and makes this model an linear static analysis, gets the distributions of stress and strain of the principle shaft system parts which are forced by loads. Secondly, the author makes an analysis forextrusion wheel’s temperature field, finally gains the extrusion wheel’stemperature stress that has been produced by temperature difference.This paper firstly makes a whole structure’s finite element analysis for the principle shaft system. The author makes use of gap elements in I-DEAS software to simulate inner elastic contact problem, so the distributions of stress and strain of the principle shaft parts that get from finite element analysis can represent actual status. These results become the reference for determinanting parts’ mechanical strength and designing congeneric machine.更多还原