【作者】 王浩然；

【导师】 周文龙；

【作者基本信息】 大连理工大学 ， 材料加工工程， 2008， 硕士

【摘要】 筒形件强力旋压塑性成形方法被广泛地应用于卫星、导弹、航空、军械等工业部门。筒形件是应用于航空、航天、兵器等领域的一类重要零件。筒形件强力旋压生产中工艺参数的确定主要依靠工艺试验和技术人员的经验,有可能影响产品的研制、生产周期,导致成本增加,所以迫切需要了解和掌握筒形件强力模环旋压成形机理及规律,这是研究和发展该技术迫切需要解决的关键性问题。本文基于弹塑性有限元平台MSC.Marc,筒形件模环旋压为研究对象,采用数值模拟和理论分析相结合的方法,研究建立了该过程的三维有限元分析模型,并分析了模环旋压成形机理及工艺参数对其成形过程的影响规律。主要研究内容和结果如下:对筒形件模环旋压有限元计算中的几何建模、网格划分、边界条件和载荷的定义进行了分析,提出了适合筒形件模环旋压的处理措施。简述旋压成形有限元模拟相关的弹塑性有限元基本理论,包括虚功方程、增量方程、弹塑性本构方程以及有限元求解方程等。本文对模环旋压过程中的应力、应变进行了分析,研究了模环旋压中工艺参数的影响。研究了旋轮成形角、旋轮圆角半径、牵引速度、减薄率等对筒形件模环旋压中旋压力的影响。计算分析了旋压变形时的应力分布,并对旋压加工中的隆起现象进行了分析,计算了旋压力,得到了工艺参数对隆起及旋压力的影响关系。计算结果表明,对于本文所描述的加工工艺条件下,采用成形角为20～25度,减薄率为25%～30%,旋轮圆角半径为4.5mm～6.0mm,牵引速度为0.4mm/s～0.6mm/s范围时,成形工件质量较高。数值计算结果与试验结果吻合较好。该模拟计算为模环旋压工艺参数的确定与优化,提高产品质量提供了依据。更多还原

【Abstract】 In this paper FEM simulation model was founded according to the character of the die and mould ring power spinning formation process. The process had been analyzed based on a three-dimensional elastic-plastic finite element model. The effects of process parameters and deforming theory are investigated. The content of the project and main results are as follows:Tube power spinning is a complex plastic volume forming method widely used to produce parts in satellite, missile, aviation etc. Cylinder are a kind of very important parts, widely used in aerospace and military industry, etc. The spinning process parameters that were used need to be determined through process tests and experience of engineers. People spend much time on studying the theory in tube power spinning. Research on the deformation mechanism and deformation laws of tube power spinning. Die and mould ring power spinning is a key problem urgently to be solved for the research and development of tube power spinning.The geometry model building, meshing, refining, boundary condition and applying load are analyzed. Compatible methods are applied to the power spinning. The Elastic-plastic finite element theory interrelated to spinning process is explained, including virtual work equation, increment equation, Elastic-plastic constitutive equation, equation of finite element solution.The stress and strain in spinning process are analyzed. The influence of process parameters on spinning forming is also analyzed. Through the FEM model, the affections of roller forming angle, roller angle radius, pulling speed, reductions of wall thickness are during die and mould ring power spinning process.The sector’s distribution of spinning stress on inner surface was obtained. The phenomenon of build up during spinning process was analyzed, and spinning force was also calculated. The effects of process parameters on build up and spinning force were demonstrated. Workpiece has high quality on process parameters of roller forming angle: 20～25 degrees, roller angle radius: 4.5mm～6.0mm, pulling speed: 0.4mm/s～0.6mm/s, and reductions of wall thickness: 25%～30%. The results of simulation agree well with the spinning experiment.The result provides a certain technical support and parameter optimization for die and mould ring power spinning.更多还原