机械专业毕业设计外文翻译Word文档下载推荐.doc

1、一个集成的CAD / CAE / CAM系统在汽车冲压模具中的应用机械专业外文翻译 Application of an integrated CAD/CAE/CAM system for stamping dies for automobiles Bor-Tsuen Lin & Chun-Chih KuoAbstract The globalization and competition in the automobile industry makes it necessary to reduce the time spent on product development. Therefore

2、, computer aided product development has become one of the most important techniques in the automobile industry. According to the concurrent engineering concept, an integrated CAD/CAE/ CAM system for automobile stamping die development is established. The system is based on 3D surface construction C

3、AD software STRIM, CAD/CAE software CATIA, stamping formability analysis software DYNAFORM, CAM software CADCEUS, a stamping design knowledge- based system, and a product database. This paper uses the development of trunk lid outer panels as an example to showcase the power of the system, in which t

4、he different development stages can be performed simultaneously. The system can greatly reduce the development time and cost, improve the product quality, and push products into the market in a relatively short time.1 Introduction Since stamping parts have considerable potential because of their com

5、petitive productivity and performance, they have been widely used in the automotive industry. However, the manufacturing industry has three major goals: to improve product quality, to reduce development cost, and to reduce the time spent on development. In order to achieve these goals, we need to br

6、ing in new technologies. From the manufacturing viewpoint, the major requirement for most applications of sheet metal is good formability 1. Given that part surfaces have become more and more complex and sharp-edged, we need to take advantage of formability analysis to understand their stamping prop

7、erties. In 1963, Keeler and Backofen 2 introduced the concept of forming limit diagrams （FLDs）.They analyzed the shape and size for an etched circle-grid of sheet metal after it had been stamped. This technique has been widely used in sheet metal formability analysis since then. Recently, software t

8、hat uses a finite element method has been used to analyze and simulate sheet metalformability. Chen and Liu 3 combined circle-grid analysis with formability analysis to identify an optimal die face, so that the split defect at the drawn-cup wall in the rear floor panel could be avoided. Makinouchi 4

9、 used formability analysis software to analyze four stamping partsfenders,trunk lid outer panels, side frame outer panels, and tire disk wheelsand to predict their blank geometry, springback, sheet thickness, residual stress, and common defects after stamping. Bigot et al. 5 developed a methodology

10、to validate the modeling of an aluminum forming process based on dimensional characterization and finite element comparison. Taking advantage of artificial neural network, knowledge based systems and finite element analysis, Pilani et al. 6 proposed a method for automatically generating an optimal d

11、ie face design based on die face formability parameters. Since die structures are becoming more and more complex and large-sized, we must use a solid model in die design to avoid any potential interference among the various components. Moreover, the solid model can be used for building dissolve mode

12、ls and estimating the fragile section of die structures. Therefore, it is necessary to use a 3D CAD/CAE/CAM system to build solid models, todevelop CNC tooling path programs, and to analyze the stress of die structures when developing stamping dies. Nahm and Ishikawa 7 utilized the set-based design

13、approach with the parametric modeling technique to handle the uncertainties that are intrinsic at early stages of the design. Park et al. 8 combined a CAD/CAM system with a knowledge-based system to develop deep drawing dies ofthe motor housing. Cheng et al. 9 used Visual C+ programming to create CA

14、D software for the conceptual design of the scroll compressor, and fabricate a real orbiting scroll part on a CNC machining center. The globalization and competition in the automotiveindustry makes it necessary to reduce the time spent on product development. Networks are widely used nowadays.As a r

15、esult, Kao and Lin 10 designed a system that uses a local area network and the Internet to allow two geographicallydispersed CAD/CAM users to simultaneously work on the development of products. Kong et al. 11 developed an Internet-based collaboration system for a press die design process for automob

16、ile manufacturers to shear design models and analysis results. Moreover, an integrated CAD/CAE/CAM system can tremendously improve productivity. Xu and Wang 12 used the multi-model technology and an integrated CAD/CAE/CAM system to develop cylinder head. Yue et al. 13 took advantage of the concurrent engineering co