对称截面辊花参数化设计方法  

Parametric design method for symmetrical section roll flower

作　　者：肖子民 阎昱 王海波 邝霜 Xiao Zimin;Yan Yu;Wang Haibo;Kuang Shuang(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China;HISCO Group,Shijiazhuang 050024,China)

机构地区：[1]北方工业大学机械与材料工程学院,北京100144 [2]河钢集团唐钢公司,河北石家庄050024

出　　处：《锻压技术》2024年第2期62-70,共9页Forging & Stamping Technology

基　　金：北京市自然科学基金资助项目(KZ200010009041)。

摘　　要：为了提高辊花设计效率,解决传统辊花设计繁琐、修改困难等问题,根据板料弯曲时截面中性层长度不变原理,建立了描述成形截面形状变化的节点坐标映射模型。通过分析辊弯成形时板料弯曲截面圆弧节点坐标的变化规律,以一段圆弧和直线作为板料弯曲的最小体素单元,得出目标截面几何尺寸参数与截面上节点坐标之间的函数关系,并推导出板料以定半径法和定长度法弯曲时,描述对称型截面形状变化的节点坐标计算公式。最后,以8弯角对称截面为例,根据推导的节点坐标计算公式,将断面特征识别转化为断面参数输入,并结合参数化设计思想,编写了基于ABAQUS二次开发的python脚本程序,实现了多种对称型截面辊花图的绘制,并通过尺寸对比,验证了所设计辊花的合理性以及设计方法的可行性。In order to improve the efficiency of roll flower design and solve the problems of cumbersome design and difficult to modify for traditional roll flower,according to the principle of constant neutral layer length for the section during the bending process of sheet,a node coordinate mapping model describing the shape change of the formed section was established,and by analyzing the changing rules of arc node coordinates for the bent section of sheet in roll forming,taking an arc and a straight line as the smallest voxel unit for the sheet metal bending,the function relationship between the geometric parameters of target section and the node coordinates on the section was obtained,and a node coordinate calculation formula describing the shape change of the symmetric section when the sheet was bent by the fixed radius method and the fixed length method was deduced.Furthermore,for the eight-bent angle symmetric section,according to the derived node coordinate calculation formula,the identification of section characteristics was converted into the input of section parameters,and com-bined with the parametric design idea,a python script program based on the secondary development of ABAQUS was written to realize the drawing of various symmetrical section roller pattern,and the rationality of the designed roll flower and the feasibility of the design method were verified by dimensional comparison.

关 键 词：辊花设计 板料弯曲 坐标映射 参数化设计 对称型截面 

分 类 号：TG306[金属学及工艺—金属压力加工]