摘要近些年来随着计算机技术的发展以及数值模拟技术的不断完善，板料拉深成形有限元分析发已经被广泛的应用于冲压件的生产当中，有限元模拟缩短了模具开发周期和减低模具了开发成本。

防尘盖是典型的凹槽薄壁拉深桶件，本课题首先分析防尘盖成型特点预测危险点，结合成形特点制定出四种冲压方案，用PRO/E进行CAD模型建立，并通过Dynaform进行不同方案的拉深成形有限元模拟试验，讨论了不同的工艺方法对防尘盖拉深成形效果的影响，最终得出最优成形方案，为生产实践提供参考。62945

毕业论文关键词：拉深成形，防尘盖，Dynaform，工艺方法

毕业设计说明书（论文）外文摘要

Title  Finite Element Analysis and Process Optimization of Dust Cover drawing forming 

Abstract In recent years with the development of computer technology and numerical simulation technology, the development of sheet metal deep drawing finite element analysis has been widely used in the production of stamping. Finite element simulation shortens the development cycle and reduces the mold development costs.

Dust cover is a typical drawing thin groove barrel piece.Firstly, predict dangerous points of the dust cover molding characteristics were analysised.Combined with punching forming characteristics, four different forming plans were developed with the PRO/E for CAD models and carried out through Dynaform a drawing program FEM simulation experiments. Different technological methods of  Dust deep drawing effect were discussed. In conclusion, the optimal solution for the production of practical reference was provided.

Keywords: deep drawing , dust cover , Dynaform, process methods

目   录

1 引言 1

1.1 有限元分析在板料拉深成型中的应用现状 1

1.1.1 国外发展现状 1

1.1.2 国内发展现状 2

1.2 板料拉深成形中常见问题 3

1.3 拉深成形中常见问题解决方法 4

1.4 主要研究内容及目标 5

1.5 论文组织结构 5

2 防尘盖拉深成形特点及工艺方案 7

2.1 凹槽薄壁桶件拉深成形的特点及主要问题 7

2.2 防尘盖的拉深成形工艺方案 8

3 防尘盖CAE建模与仿真 10

3.1 防尘盖拉深成形有限元分析模拟流程图 10

3.2 坯料及压边力计算 11

3.3 防尘盖的CAD模型 11

3.4 防尘盖拉深成形CAE模型 12

3.4.1 方案一——一步拉深成形 12

3.4.2 方案二——两步拉深成形