DYNAFORM矩形拼焊件拉深成形有限元分析与工艺正交优化
本课题首先对矩形拼焊板的成形特点和主要缺陷进行了分析研究，然后，运用INVENTER和DYNAFORM进行拉深成形有限元建模，通过有限元建模方法，结合正交试验研究了不同的冲压速度、厚度比、压边力和焊缝位置等对板料成形性能的影响，通过数值模拟仿真的分析来定义材料性能，模具几何参数和焊接条件等以得到较好的工艺组合，为实际应用做出合格产品做参考。6965
关键字：矩形，拉深，拼焊板，有限元分析，正交试验。
毕业设计说明书（论文）外文摘要
Title Finite Element Analysis and Orthogonal Optimization of Rectangular Tailor-welded Blanks Deep Drawing Process
Abstract
In recent years, with the world increasingly emphasizing on the environmental protection, energy and security, the three main objectives of automobile industry development are as follows: reducing vehicle weight, saving energy, lowering energy consumption and reducing pollutant discharge, and improving vehicle safety performance. In the low-carbon economic development trend, the tailor-welded blanks stamping technology combined with traditional materials and manufacturing processes is widely used.
Firstly, rectangular tailor-welded blank forming characteristics and defects are analysised. Then, finiter element of deep drawing is modeled by INVENTER and DYNAFORM. By the finite element analysis approach,combined with the orthogonal experimental design, rectangular tailor-welded blank forming performances are studied, such as different stamping speeds, different thicknesses, different blank holder forces, different weld locations. The impact of these factors may lead to various defects in the forming process. By the numerical simulation analysis, the material properties,mold geometry parameters and welding conditions are defined in order to get the best process for the actual application.
Keywords: Rectangle, drawing, tailor-welded blank, finite element analysis, Orthogonal test.
目 录
1绪论1
1.1选题背景1
1.2 拼焊板冲压成形研究现状 2
1.3 主要研究目标及内容 3
1.4论文的组织结构 4
2矩形拼焊板拉深成形工艺分析 5
2.1矩形拼焊板拉深成形特点 5
2.2矩形拼焊板拉深成形的常见缺陷 6
2.3影响矩形拼焊板拉深成形的主要因素 7
3矩形拼焊板盒形件有限元建模 9
3.1 DYNAFORM简介 9
3.2基于DYNAFORM的矩形拼焊板冲压成形模拟的流程 9
3.3研究方案 16
4矩形拼焊板盒形件冲压成形的仿真分析及正交优化18
4.1冲压速度对成形的影响分析 18
4.2压边力对成形的影响分析 22
4.3凸模圆角半径对成形的影响分析 27
4.4板厚比对成形的影响分析 30
4.5焊缝位置对成形的影响分析 35
4.6正交试验及方案比较 38
4.7小结 47
结论 48
致谢 49
参考文献 50
1绪论
1.1选题背景
近年来，汽车工业在中国发展非常迅猛，汽车制造已是一个竞争异常激烈的行业，汽车制造者需要不断地采用新制造工艺来降低汽车制造成本，提高汽车性能和降低汽车重量从而增加自己的竞争力，在这一行业中才能有很好的发展。拼焊板技术是一种能够解决以上问题的一项关键技术。从20世纪80年代中期开始，拼焊板作为新技术在欧洲、美国、日本得到了广泛的关注。拼焊板工艺主要是为汽车行业进行配套服务，尤其在车身零部件生产、制造和设计方面，拼焊板的使用有着巨大的优势[1,2]。
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