外筋筒壳旋挤成形方法及扩径现象  

Spin extrusion forming method and diameter expansion phenomenon of cylindrical shell with outer rib

作　　者：王康培 赵亦希[1] 陈星翰 于忠奇[1] WANG Kang-pei;ZHAO Yi-xi;CHEN Xing-han;YU Zhong-qi(Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《塑性工程学报》2023年第8期83-91,共9页Journal of Plasticity Engineering

基　　金：国家重点研发计划(2020YFA0711102);国家自然科学基金资助项目(51875352,52175346)。

摘　　要：针对外筋筒壳加工成形,提出了一种径向挤压、周向展成的局部连续体积成形旋挤方法,基于DEFORM-3D有限元软件建立了外纵、横筋薄壁筒壳旋挤成形仿真模型,分析了外纵、横筋的应力-应变分布规律,验证了旋挤成形外筋筒壳的可行性,并针对筒壳易产生的扩径现象进行了工艺改进。结果表明,使用该方法可以实现外纵、横筋筒壳的成形加工,外纵筋的填充比外横筋相对更充分;局部集中的周向拉应力使内壁有不均匀扩径的趋势,通过限制法兰区域的周向流动可遏制扩径现象。该方法具有成形载荷低、材料利用率高的特点,有望成为带筋筒壳加工的新途径。Aiming at the processing and forming of the cylindrical shell with outer rib,a local continuous volume forming spin extrusion forming method of radial extrusion and circumferential development was proposed.Based on the DEFORM-3D finite element software,the simulation model of spin extrusion forming of thin-walled cylindrical shell with outer vertical and horizontal ribs was established,the distribution laws of stress-strain of outer vertical and horizontal ribs were analyzed,and the feasibility of spin-extrusion forming of cylindrical shell with outer ribs was verified.For the expanding phenomenon that is easy to occur in the cylindrical shell,the process improvement was carried out.The results show that using this method can realize the forming process of cylindrical shell with outer vertical and horizontal ribs,and the filling of outer vertical ribs is relatively more sufficient than that of outer horizontal rib;the local concentrated circumferential tensile stress causes the inner wall to have a tendency of uneven diameter expansion.And the diameter expansion can be prevented by limiting the circumferential flow in flange areas.This method has the characteristics of low forming load and high material utilization rate,and is expected to be a new way of processing cylindrical shell with ribs.

关 键 词：纵横外筋筒壳 旋挤成形 扩径度 数值模拟 

分 类 号：TG306[金属学及工艺—金属压力加工]