【作者】 胡文骏；

【导师】 谢桂兰；

【作者基本信息】 湘潭大学 ， 材料加工工程， 2011， 硕士

【摘要】 薄壁曲母线形件是广泛用于航空、航天和兵器工业中的一类零件和中间道次旋压件,探讨薄壁曲母线形件的旋压成形机理对于研究其成形规律与成形精度具有很重要的意义。本文建立了薄壁曲母线形件旋压过程的三维有限元模型,研究了曲母线形件旋压成形机理和主要工艺参数对其成形过程的影响规律。主要内容如下:在一些假设和简化基础上建立了薄壁曲母线形件旋压成形的有限元模型,并对其成形过程进行了模拟。通过对模拟结果的分析,得到了在曲母线形件拉深旋压成形过程中应力应变的分布及变化规律,从而探讨了曲母线形件旋压过程的成型机理及成形规律。研究各种工艺参数(如旋轮直径、进给比、主轴转速和坯料倾斜角等)对薄壁曲母线形件旋压成形过程的影响。通过对比不同工艺参数下的模拟结果,得到了不同工艺参数对旋压成形质量、等效应力与等效应变、旋压力这些旋压件性能指标的影响规律,为工艺参数的选择提供了依据,并在此基础上确定了一组合理的工艺参数值。通过对模拟结果的分析,文中还探讨了可能产生的缺陷及其预防措施,从而为该类零件的旋压成形提供了一定的参考。更多还原

【Abstract】 The parts with the shape of thin-wall and curvilinear generatrix are a kind of parts and pony-roughing pass spun parts which are widely used in the industry of aviation, aerospace and weapons. It will be great significant to discuss the spinning forming theory of this kind of parts for the research of their forming discipline and forming precision. A three-dimensional finite element model of the parts with the shape of thin-wall and curvilinear generatrix during the forming process has been established in this text, and spinning forming theory of this kind of parts besides the law of how the main technological parameters affecting their forming process have been researched. The main content is as follow:A finite element model for the process of forming this kind of spun parts has been established. The forming process has been simulated. By the analysis of the simulated results, the distribution and alteration law of stress and strain about the parts with the shape of thin-wall and curvilinear generatrix during the deep drawing spinning process is gained, thus spinning forming theory of the parts with the shape of thin-wall and curvilinear generatrix during the spinning process can be discussed in a certain extent.Effect of the minor technological parameters (such as temperature, equipment characteristic and material property, etc.) is neglected in the text and only the effect of the main technological parameters (such as the diameter of the wheel, feed speed of wheel, rotate speed of the spindle and dip angle of the work piece) which affect the spin forming process has been researched. By comparing the simulation result of different technological parameters, the law of how the different technological parameters affect the performance index of the spun parts has been gained, and the parameters which were mentioned above include forming quality,the equivalent stress and the equivalent strain, the spinning force. It provides reference for selecting the technological parameters, and reasonable technological parameters are selected basing on it. By the analysis of the simulation result, the possible defect and the preventive action have been discussed, and the reference is provided for spin forming process of this kind of work piece.更多还原