电机壳拉深成形工艺及其仿真研究.doc

PAGE 毕 业 设 计 (论 文) 专 业 机械设计制造及其自动化 课 题 电机壳拉深成形工艺及仿真研究 摘 要 在计算机高速普及的信息时代,模具设计通过CAE的辅助功能显得简单快捷,尤其是对于拉深件模具的设计更显其优越性。在塑料模具、锻压模具、铸造模具等种类繁多的模具中,设计工艺复杂的拉深模具,除了要考虑其必要的工艺补充外还要对模具的拉深深度进行必要的计算。如果给的拉深深度过大不但会造成法兰边起皱,而且会在圆角较小的部位开裂,给制造带来极大的不便。按照传统的计算方法,会存在很大的误差。采用CAE 进行模具设计时,通过计算机辅助设计软件建立力学模型,使得设计计算变得简单可靠。对不合适的部位及时进行调整,确定合理拉深深度,避免在模具制造好后造成大量的修模。 本文以典型盒形拉深件为研究对象，应用有限元仿真方法，分析不同工艺参数(凹模圆角半径、摩擦系数以及压边力的大小及分布等)对盒形件拉深的影响，然后通过有限元软件DYNAFORM模拟拉深成形过程，获得成形的相关工艺参数及模具结构对盒形件成形质量的影响，并通过修改工艺参数来为工艺优化提供基础。 关键词：DYNAFORM 5.6 拉深 模拟 工艺分析 Abstract In the information age of computer high-speed spread, die design through CAE seems quick and easy accessibility, especially for the mold design drawing even more to its advantages. In a wide variety of plastic mold, forging mold, casting mold and so on, the design process of complex drawing die, is not only considered the need for additional external process but also calculated the degree of deep drawing dies necessarily. If you spend over-big degree of drawing deep, it not only cause flange edge wrinkles, but also crack in smaller round parts and create great inconvenience for manufacturing. According to the traditional method, there will be a great error. Using CAE for mold design, the mechanical model is established by computer aided-design software, it makes design calculations easy and reliable. By adjusting inappropriate parts in time to determine a reasonable degree of deep drawing, it will avoid causing a large number of repairing model after a good model.  The subject uses typical box-shaped drawing parts for forming process analysis and modeling, and by finite-element simulation, analysis the effect of different material properties and process parameters (blank shape and size、die corner radius、friction coefficient and blank holder force size and distribution) to each other shaped box of drawing, and then by finite element software DYNAFORM simulate drawing process to obtain the relevant process parameters and forming the str