薄壁管材多斜辊等曲率矫直工艺方案与实现  

Setting and realizing process plan for straightening thin-walled tube by multiple cross rolls of equal curvature

作　　者：张子骞[1] 杨会林[1] ZHANG Zi-qian;YANG Hui-lin(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学机械工程与自动化学院

出　　处：《钢铁研究学报》2018年第8期625-632,共8页Journal of Iron and Steel Research

基　　金：中央高校基本科研业务专项资金资助项目(N160304010)

摘　　要：针对薄壁管材在连续矫直过程中矫直方案与等曲率矫直辊弯曲半径难以定量确定的实际问题。基于多斜辊统一矫直机理与薄壁管材弹复方程建立了等曲率矫直辊统一曲率半径的判断方法,提出了最小统一曲率半径的搜索方法,针对不同初始弯曲程度的薄壁管材给出了具体矫直方案,其中对于无法一次统一的具有大初始变形的管材提出了先预弯曲再统一后矫直的方法,确定了薄壁管材可矫直判断条件,采用VB开发程序通过算例证明了上述方法的有效性,发现了若针对某一初始弯曲半径的统一曲率半径存在则其并不唯一必在一定范围之内,同时发现初始曲率半径在一定范围内的管材无法应用二斜辊实现曲率统一。Since it was difficult to setting the plan and the unifying curvature-radius precisely when the thin-walled tubes were straightened continuously by the rolls of equal curvature.Therefore,based on the mechanism of unifying-straightening for the multiple cross-rolls straightening machine,the judgment method of the unifying curvature-radius was presented firstly in view of the bending and springback equation of the thin-walled tube,and then the searching method of the minimum unifying curvature-radius was presented subsequently,finally the straightening plans were drawn up for different thin-walled tubes with different initial curvature radii,especially for the thin-walled tube with the large initial deformation which could not be unified by the two cross rolls,the new method was pre-bending,unifying,and straightening,and it was also presented whether a thin-walled tube could be straightened.Some procedures were developed by VB to calculate the example,which is shown that the methods are effective,meanwhile it is found that if the unifying curvature-radius exist for an initial curvature-radius,it will not be sole and will be within a scope,and it is also found that there must be a scope of the initial curvature-radius within which the thin-walled tubes can＇t be unified by the two cross rolls.

关 键 词：等曲率矫直 薄壁管材 统一曲率半径 多斜辊 

分 类 号：TG306[金属学及工艺—金属压力加工]