【作者】 丁永胜；

【导师】 周超；

【作者基本信息】 燕山大学 ， 材料加工工程， 2011， 硕士

【摘要】 冷辊压成形是金属板材和带材加工中的一个重要领域。由于冷辊压成形过程是几何、材料和接触边界等多重非线性的复杂变形,故影响成形过程的因素很多。虽然冷辊压型材已广泛应用于汽车、航空、轻工、机械制造等各个行业,但是,冷辊压成形工艺的确定主要依赖设计者的经验知识,因此,对冷辊压成形工艺的研究具有重要意义。本文介绍了冷辊压成形过程以及冷辊压成形工艺。根据冷辊压成形工艺的设计原则,利用COPRA设计了F18 B柱进行滚花图的设计和辊型。采用COPRA软件中的变形模拟模块对设计的孔型和辊型进行模拟分析,同时利用DYNAFORM模拟软件对冷辊压成形过程进行了有限元模拟分析,通过分析成形过程、应力和应变,将成形中存在缺陷的道次进行了修改,得到合理的成形工艺。根据设计的F18 B柱冷辊压成形工艺制造了生产线,并对生产线进行了调试,对成形过程中存在的缺陷进行了分析,提出合理的解决方案。将实际调试中出现的问题与模拟分析做了比较,得出有限元模拟对冷辊压的成形过程起到一定的指导作用。本文研究的目的是为了指导B柱类型材的生产。分析了冷辊压成形的原理和工艺,采用理论分析和有限元模拟相结合的方式,使得冷辊压成形工艺更加完善,将研究的成果应用于实际生产中,生产出合格产品。更多还原

【Abstract】 Cold roll-forming is a significant field in forming of strip metal.Because the forming process of cold roll-forming is nonlinear deformation process that collect geometric distortion, material problem and contact boundaries problem, many factors influence the forming process. Though the piece of cold roll forming has been widely used in automotive, aerospace, light industry, machinery manufacturing industry, and etc, but the determination of the form- ing technology in cold roll-forming mainly dependent on engineer’s experience. Therefore, it is great importance to do research work on technology of cold roll forming.The paper mainly introduce cold roll forming process and forming technol- ogy. Base on principle of cold roll forming, the flower diagram and roller designing of F18 B pillar are designed by software of COPRA. The groove pass and roller type are simulated by DTM in software of COPRA. And the forming process of cold roll forming is simulated by software of DYNAFORM. By analysising forming process, strain and stress, the defects in the forming are modified. The reasonable forming technology is gained. According to the design of forming technology of F18 B pillar, the production line is made. The defects in the forming are analysised, and the methods solving the defects are put forward. Compared the problems of practice and the problems of simulation, it can be concluded that the finite element simulation play a guiding role on the forming process of cold roll forming.The purpose of the paper is to provide guidance to production of B pillar. The principle and technology of forming is analysised. and the forming process is simulated by finite element analysis. By combining with the forming theory and finate element analysis, the forming technology become better. The research achievement is applied in practice production, and the high-quality product is produced.更多还原