摘要
提出了一种适用于盒型件等非轴对称结构的径向分区压边方法,可对法兰不同径向区域独立加载压边力。首先,采用理论方法建立了法兰区皱纹模型,并推导出相对于传统压边方法,新方法只需要更小的压边力即可以抑制起皱,初步验证了径向分区压边方法的理论可行性。然后,采用有限元方法对成形效果进行了数值模拟。结果表明,径向分块压边圈对控制材料的流动更有效,可有效地抑制起皱并且提高成形极限。最后进行了板材拉深成形实验。同样施加5.9 kN的压边力,径向分区压边方法作用下的盒型件具有更好的成形效果,验证了所提出的新压边方法用于板材成形是切实可行的。
A radial segmented blank holder technique for drawn box is proposed, which can realize independent loading of blank holder force along the different radial zones. Firstly, the wrinkling model on the flange is established by theoretical derivation. The wrinkles can be suppressed with a smaller blank holder force compared with the conventional blank holder method which preliminarily proves the theoretical feasibility of the new blank holder method. Then, the numerical forming simulations are carried out by using the finite element method. The results show that the radially segmented blank holder can effectively control the material flow, suppress wrinkling and improve the forming limit. Finally, the deep drawing experiment is carried out. With the same blank holder force of 5.9 k N, the drawn box under the action of the new blank holder method has better forming quality, which verifies that the radial segmented blank holder technique is feasible for sheet metal forming.
作者
张红升
秦泗吉
张婷婷
ZHANG Hongsheng;QIN Siji;ZHANG Tingting(Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education of China,Yanshan University,Qinhuangdao 066004,CHN;Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse,School of Environment and Chemical Engineering,Yanshan University,Qinhuangdao 066004,CHN)
出处
《制造技术与机床》
北大核心
2023年第3期135-140,共6页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金资助项目(51675466)
河北省自然科学基金资助项目(E2021203043)。
关键词
铝合金
拉深
成形
压边力
aluminum alloy
deep drawing
forming
blank holder force
