多点复合渐进成形与单点渐进成形的对比分析

发布时间：2019-05-21 23:12

【摘要】：为提高金属板材渐进成形的成形质量、成形精度、成形效率和成形极限,了解不同渐进成形工艺对制件成形性能的影响,本文以典型方锥台制件为研究对象,利用有限元软件MSC.Marc对2种渐进成形工艺进行了三维建模,对比分析了单点渐进成形和多点复合渐进成形对制件等效塑性应变、厚度分布和成形精度的影响.数值模拟结果表明:单点渐进成形的等效塑性应变和厚度减薄主要集中在制件相邻侧壁间的拐角处,而多点复合渐进成形的等效塑性应变和厚度减薄均匀地分布在制件成形区;相同成形工艺参数下,相比单点渐进成形,多点复合渐进成形更有利于制件的成形效率、成形质量、成形精度和成形极限的提高,更有利于抑制破裂等失稳现象的产生.2种渐进成形工艺的成形试验表明,数值模拟结果与试验相符.
[Abstract]:In order to improve the forming quality, forming accuracy, forming efficiency and forming limit of sheet metal progressive forming, and to understand the influence of different progressive forming processes on the forming properties of parts, the typical square cone table parts are taken as the research object in this paper. The three-dimensional modeling of two kinds of progressive forming processes is carried out by using the finite element software MSC.Marc. The effects of single point progressive forming and multi-point composite progressive forming on the equivalent plastic strain, thickness distribution and forming accuracy of the parts are compared and analyzed. The numerical simulation results show that the equivalent plastic strain and thickness thinning of single point progressive forming are mainly concentrated at the corner between the adjacent side walls of the part, while the equivalent plastic strain and thickness thinning of multi-point composite progressive forming are evenly distributed in the forming zone of the part. Under the same forming process parameters, compared with single point progressive forming, multi-point composite progressive forming is more beneficial to the improvement of forming efficiency, forming quality, forming accuracy and forming limit of parts. The forming experiments of two kinds of progressive forming processes show that the numerical simulation results are in good agreement with the experimental results.
【作者单位】：江西理工大学机电工程学院;
【基金】：国家自然科学基金项目(50975131) 江西省自然科学基金项目(20132BAB206013)
【分类号】：TG306

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