DYNAFORM斜口矩形件拉深成形的有限元分析和工艺研究
时间:2018-03-05 10:25 来源:毕业论文 作者:毕业论文 点击:次
| 摘要斜口矩形件是不规则零件，拉深成形时在圆角处易产生变薄拉裂以及凸缘的起皱。同时由于零件不对称，不等深的形状造成材料拉深成形时应力复杂且应力不等大。通过拉深成形的有限元数值模拟仿真分析，可以提高表面成形质量，控制破裂和起皱等缺陷的产生。 本课题以斜口矩形件为研究对象，对斜口矩形件拉深成形中的主要特点进行了分析，探讨了斜口矩形件拉深成形的缺陷。首先根据斜口矩形件的特点，利用PRO-E建立了包括零件、凸模、凹模以及压边圈在内的三文有限元分析模型。然后以有限元分析软件Dynaform为研究手段，通过数值模拟的方法，对斜口矩形件的拉深成形进行了仿真分析。初步探讨了在可行范围改变板坯形状、压边圈、凸模运动速度、模具参数、拉延筋、压边力、润滑等参数对斜口矩形件拉深成形的影响。最后，通过多因素正交试验得出了最优方案，对斜口矩形件拉深成形及产生缺陷原因等提出了针对性的解决措施。19207 关键词： 斜口矩形件 拉深成形 DYNAFORM 正交试验 毕业设计说明书（论文）外文摘要 Title Finite Element Analysis and Research of beveled rectangular part Drawing Forming and Process Abstract Beveled rectangular part is an irregular Part. During deep drawing, it is prone to cracking In the corner and wrinkling in the flange. Meanwhile, the stress is complex and the stress range is big in the process of deep drawing due to the part shape which is asymmetry and ranging from deep. With the finite element numerical simulation analysis of deep drawing forming, the quality of surface forming is improved and flaws like cracking and wrinkling got controlled. The research is focus on beveled rectangular part, analyzing the main characters and discussing the defects in beveled rectangular part deep drawing process. First of all, according to the characteristics of the rectangular pieces of a bevel, the 3D finite element analysis models are built with the PRO-E including parts, punch, die and binder. Then, by means of finite element analysis software Dynaform to study ,the simulation analysis of deep drawing for beveled rectangular part is done through the method of numerical simulation and preliminarily discuss the effect of changing parameters like blank shape, binder, the speed of punch, mould parameters, drawdeads, blank holding force, lubrication ect., to the extent practicable on beveled rectangular parts deep drawing. Finally, the optimal solution is obtained through multi-factor orthogonal experiment. Keywords Beveled rectangular part Deep drawing DYNAFORM Optimal solution 1 绪论 1 1.1 选题背景 1 1.2 国内外发展现状及水平 1 1.3 主要研究目标及内容 3 1.4 论文的组织结构 3 2 斜口矩形件冲压成形工艺理论分析 5 2.1 斜口矩形件拉深成形的理论 5 2.2 斜口矩形件拉深成形的主要缺陷 6 2.3 斜口矩形件拉深成形的影响因素 7 2.4 本章小结 8 3 基于有限元斜口矩形件拉深成形建模与仿真 9 3.1 基于Dynaform的斜口矩形件拉深成形模拟的流程 9 3.2 斜口矩形件拉深成形有限元模型的建立 11 3.3 斜口矩形件CAD建模 11 (责任编辑：qin) |