典型圆筒件拉深过程模拟(胡笑文).doc

江 西 理 工 大 学 南 昌 校 区 毕 业 设 计（论文） 题 目：典型圆筒件拉深过程模拟 系 ：机电工程系 专 业：模具设计与制造 班 级：09模具（1）班 学 生：胡笑文 学 号指导教师：吴晨刚 职称：讲师 摘 要 板料的拉深成形是一个复杂的动态过程，在实际应用中经常会产生起皱、拉裂等各种缺陷，甚至可能产生废品，严重影响了我们正常的生产。目前对产品缺陷进行模拟分析并优化，主要就是凭借设计人员的经验和所了解的知识进行分析和解决问题，所以往往很难获得比较令人满意的优化结果。为了更好的解决这个问题，可以在CAD之后的CAE阶段运用数值模拟技术对拉深成形过程进行模拟分析，从而在产品开发的早期通过CAE分析及时避免后续过程可能出现的问题。考虑到我们所学知识和现有的个人运用模拟分析软件的模拟分析能力。因此选用了在拉深成形中最常见也是最典型的圆筒形零件作为这次分析的零件，针对网格疏密、压边圈和压边力等拉深成形的影响因素，采用有限元数值模拟软件DYNAFORM对典型圆筒件进行了拉深成形过程的数值模拟研究，数值模拟软件DYNAFORM能够较好的模拟拉深成形过程及其缺陷，充分利用数值模拟的结果，能够很好地解决板料冲压成形过程中的工艺参数优化问题，找出最优的网格疏密度以及最优的压边力。 关键词：Dynaform；压边力；拉裂；起皱；数值模拟 ABSTRACT The drawing of the stamping workpieces is a complex and dynamic proeess. The workpieces are often creaked or winkled and even beeome useless during the actual production.At present，the analyses and optimization of the defects absolutely depend on the knowledge and experience of theteehnoerats.Therefore，we can’t get the satisfying result on the average.In order to solve the problem above，we can use a numerical finite element approach during the CAE stage to simulate the sheet forming proeess after the CAD stage.On this ground，the potential sources of defects and failures can be foreeasted in the early time.The method introduced above is what we called Integration of CAD/CAE. We can’t obtain the experiment data through the equipments and conditions available in view of the drawing of the covering parts need higher manufacturing and experimentation conditions.Therefore，we choose the columnar parts which is the most typical and familiar in drawing as the experiment base. According to the grid density, blank holders and blank holder force, the influence factors of deep drawing，wesheet metal forming simulation solution software Dynaform to simulate the whole drawing process of columnar parts on the base. Numerieal software Dynafonn can simulate the drawing proeess and it’s defeets rightly, so it can provide aceurate training data to the optimilzation sys