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薄壁封头电磁感应加热旋压工艺
英文标题:Electromagnetic induction heating spinning process of thin-wall head
作者:易兆祥 李新和 常士武 饶国举 曹权 
单位:中南大学 
关键词:封头旋压 电磁感应加热 有限元模拟 法兰起皱 壁厚均匀性 
分类号:TG306
出版年,卷(期):页码:2018,43(1):60-65
摘要:

火箭燃料贮箱薄壁球面封头,由于其具有大径厚比、弱刚性的特点,利用传统旋压加工方法容易出现封头结构失稳现象。提出薄壁封头电磁感应加热旋压成形的工艺方法,采用MSC.Marc有限元软件建立了薄壁封头加热旋压三维有限元仿真模型。研究了主要工艺参数——旋压温度T、进给率f和旋轮圆角半径r对封头壁厚均匀性的影响,以及温度场对法兰稳定性的作用。结果表明:在合理范围内,提高旋压温度、增大旋轮圆角半径和减小进给率可以提高成形件质量。最终确定优化工艺参数为:r=4 mm,f=1.35 mm·r-1,T=250~300 ℃。通过开展封头电磁感应加热旋压实验,验证了电磁感应加热旋压工艺方案能有效抑制法兰起皱并提高工件壁厚均匀性。

 The thin-wall spherical head of rocket fuel tank with characteristics of large diameter-thickness ratio and weak rigidity is prone to the instable structure of head processed by the traditional spinning method. Therefore, the spinning process by electromagnetic induction heating for thin-wall head was put forward, and the three-dimensional finite element simulation model of electromagnetic induction heating spinning for thin-wall head was established by finite element software MSC.Marc. Then, the influences of spinning temperature T, feed rate f and fillet radius of roller r on the wall thickness uniformity of head and the effects of temperature field on the stability of flange were analyzed. The results show that improving the spinning temperature, increasing the fillet radius of roller and reducing the feed rate within reasonable ranges can improve the quality of forming parts, and the optimized process parameters are r=4 mm, f=1.35 mm·r-1 and T=250-300 ℃. Furthermore, the electromagnetic induction heating spinning test of head verifies that the spinning process by electromagnetic induction heating can effectively restrain the flange wrinkling and improve the wall thickness uniformity of part.
 

基金项目:
国家重点基础研究发展计划(973)资助项目(2014 CB046600)
作者简介:
作者简介:易兆祥(1993-),男,硕士研究生,E-mail:yi_zhaoxiang@163.com;通讯作者:李新和(1957-),男,博士,教授,E-mail:13607444149@163.com
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