锻压技术

大径厚比薄壁封头多约束旋压成形方法

英文标题：Spinning with multi-constraint for large-diameter to thickness ratio and thin-walled spherical head

作者：常士武李新和周磊魏准张坦

分类号：TG306

出版年,卷(期):页码：2017,42(2):45-51

摘要：

大型薄壁封头具有大径厚比、弱刚性的特点，利用传统旋压加工方法易出现起皱等失稳现象。依据中心约束旋压法的成形缺陷，从能量法及金属塑性变形理论方面提出了多约束旋压新工艺方案，分析表明：多约束多道次配合作用能够增加工件成形的约束能，有效抑制法兰外缘起皱现象，成形件径厚比大，表面光洁度良好。通过逆行工程软件PolyWorks进行模型重构，得到实际加工样件母线方向的壁厚数据，其壁厚分布规律表现为两端欠减薄，中间部分过减薄，旋压终端由于约束作用，壁厚增厚明显。正负壁厚偏差比稳定在15%以内，壁厚均匀性良好。

Large thin-walled spherical head is of large-diameter to thickness ratio and weak rigidity, therefore, it is easy to appear wrinkling by traditional spinning. The scheme of multi-constraint spinning was put forward based on the energy method and the metal plastic theory as well as the forming defects of central constraint spinning. The analysis shows that the synergistic effect of multi-constraint and multi-pass can increase the energy constraint in the forming process of workpiece, and effectively restrain the wrinkling in the outer flange. So the forming part is of large-diameter to thickness ratio and good surface smoothness. The model is reconstructed by reverse engineering software PolyWorks to obtain wall thickness data of the actual sample along the generatrix direction with the distribution of lack thinning at both ends and over thinning at the center. However, due to the strong constraints, the terminal is thickened significantly. The deviation ratio of positive and negative wall thicknesses is less than 15%, so the uniformity of wall thickness is well.

基金项目：

国家重点基础研究发展计划（973）项目(2014CB 046600)

常士武(1990-)，男，硕士研究生李新和(1957-)，男，博士，教授

参考文献：

［1］龙乐豪,王小军,容易. 我国一次性运载火箭的发展展望[J]. 中国科学(E辑:技术科学),2009,(3):460-463.Long L H, Wang X J, Rong Y. The development prospect of the first launch vehicle in China[J].Science in China(Series E:Technological Sciences),2009,(3):460-463.
［2］周磊,李新和,俞大辉,等.球冠形薄壁封头在小减薄工况下的失稳研究[J].锻压技术,2016,41(1):25-31.Zhou L, Li X H, Yu D H, et al. Research on instabilities of thin-walled spherical head at low thinning rate[J].Forging & Stamping Technology,2016,41(1):25-31.
［3］史敏. 薄壁铝合金封头挡板辅助旋压成形新工艺研究[D].上海：上海交通大学,2015.Shi M. Study on Baffle-Assistant New Spinning Process for Thin-Walled Aluminum Alloy Vessel Head [D]. Shanghai: Shanghai Jiao Tong University,2015.
［4］Kleiner M, Geiger M, Klaus A. Manufacturing of lightweight components by metal forming[J]. CIRP Annals-Manufacturing Technology, 2003, 52(2):521-542.
［5］李勇. 无芯模旋压回弹变形特性及多道次轨迹规划方法仿真研究[D].杭州：浙江大学,2014.Li Y. Study on Rebound Deformation Characteristics and Multi-Pass Planning Method Simulation for Non-Mandrel Spinning[D].Hangzhou: Zhejiang University,2014.
［6］王作池,钟汉通,陈国理. 旋压封头残余应力的试验研究[J]. 压力容器,1993,(1):47-51.Wang Z C, Zhong H T, Chen G L. Experimental study on residual stress of spinning head[J].Pressure Vessel,1993,(1):47-51.
［7］葛义勇，林琳. 5052合金深冲用铝板带材退火工艺研究[J]. 机械工程师,2012,(7):114-115. Ge Y Y, Lin L. Study on annealing process of 5052 aluminum alloy sheet on deep drawing[J].Mechanical Engineer,2012,(7):114-115.

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