摘要U形弯轨件是薄板材冲压成形的典型形件，在探究回弹方向的问题具有一定的代表性。U形件的回弹是在外载荷卸载后不可避免的成形缺陷，而回弹问题严重影响形件的精度以及使用性能。CAE软件和有限元软件可以针对U形弯轨件进行成形仿真以及缺陷预测，这对冲压工艺有着重大的意义。
本课题首先利用三文制图软件PRO/E进行冲压模具的建模，之后采用有限元软件Dynaform对U形弯轨件冲压成形进行模拟仿真预测。进而,根据仿真结果探讨各影响因素如模具间隙、摩擦系数、压边力、冲压速度等对弯轨件冲压成形回弹的影响机理，并采用正交试验研究板料厚度、压边力、冲压速度以及摩擦系数这四个影响因素的影响程度，最终得出最优的成形参数。25404
关键词 U形弯轨件 冲压 有限元仿真 正交试验
毕业论文设计说明书外文摘要
Title The Finite Element Analysis Of Springback
In Stamping Of a U-shaped Rail Part.
Abstract
The U-shaped rail is a typical form of thin plate stamping parts. It has certain representativeness in the exploring of the direction of springback problem. The springback of the U-shaped is inevitable forming defects after the external loading unloading. And the springback problems affect the shape of a precision and operational performance seriously. The CAE software and finite element software can forming simulation and defect prediction for the u-shaped rail bending. It is of great significance to the stamping process.
In the first of this topic, 3D graphics software Pro/E is used to modeling the stamping die. After then, the finite element software Dynaform was carried out on the u-shaped rail bending parts stamping simulation prediction.Then, according to the simulation results to discuss the influence factors such as stamping die clearance, friction coefficient, velocity influence on rail bending parts stamping forming springback mechanism. And using the orthogonal experiment to study the Influence degree of this four factors: sheet thickness, blank holder force, punch velocity and friction coefficient. And finally, it is concluded that the optimal forming parameters.
Keywords The U-shaped rail Stamping Finite element simulation Orthogonal experiment
目 次
1 绪论 1
1.1 本课题研究的目的与意义 1
1.2 国内外板材成形回弹研究现状 1
1.3 主要研究内容及目标 2
2 U形弯轨件冲压成形的基本理论及影响因素 3
2.1 U形弯轨件常见的成形缺陷 3
2.2 影响板材冲压成形及回弹的主要因素 4
2.3 解决回弹问题的主要措施 5
2.4 本章小结 5
3 U形弯轨件冲压成形有限元模型的建立 6
3.1 U形弯轨件冲压成形及回弹仿真的步骤 6
3.2 冲压模具CAD模型的建立 8
3.3 U形弯轨件冲压成形CAE有限元模型的建立 10
3.4 U形弯轨件冲压成形及回弹的试验安排 12
4 U形弯轨件冲压成形及回弹单因素试验 14
4.1 板料参数对U形弯轨件冲压成形及回弹的影响 14
4.2 压边力对U形弯轨件冲压成形及回弹的影响 16
4.3 冲压速度对U形弯轨件冲压成形及回弹的影响 18
4.4 摩擦系数对U形弯轨件冲压成形及回弹的影响 20 PRO/E的U形弯轨件冲压回弹有限元分析与工艺研究:http://www.youerw.com/jixie/lunwen_19178.html