摘要
采用弹塑性力学分析方法,针对拉伸弯曲矫直机用于对具有初始位移缺陷(瓢曲浪形)薄带钢的浪形矫平过程进行机理建模,推导建立以带钢规格材质及初始浪形参数、拉矫工艺参数和拉矫机相关设备参数为自变量的拉矫变形过程浪形矫平功效的解析预测模型。通过定义拉矫过程中带钢宽向进入塑性变形的屈服区域边界位置作为中间变量,以及依次分别建立各项输入条件与屈服位置的关系、屈服位置与工艺条件的关系,建立浪形矫平预测模型的多变量微分方程组。为了验证该机理模型的正确性,分析初始浪形、材料强度、带钢尺寸等初始条件以及弯曲辊半径、拉矫张力等工艺条件对拉矫机对于带钢浪形的矫平改善能力的影响,并应用ABAQUS软件另行建立同样条件下薄带钢拉弯矫直过程的有限元模型,经计算并对比计算结果,两种方法的结果吻合良好。
A elastic-plastic mechanics analysis method is used to establish a analytical model of thin strip wave-shaped defects leveling mechanism, analyzing the initial wave shape, strength of materials, dimension of strip and other input conditions such as the size of the radius of curvature, global tension at the outer end, etc. Through straightening performance of wave-shaped steel can be significantly improved. The width of plastic zone of strip after processing is defined and analyzed and it is taken as an intermediate variable to establish the relationship among various strip parameters, strength of material and process parameters, and further multivariable differential equations with respect to prediction model of wave-shaped defect’s leveling improvement would be derived. In order to verify the correctness of the model, the article analyzes the impact of inputs as initial wave shape, strength, dimensions and process parameters like the radius of curvature, tension on the improved performance after straightening. Furthermore, a finite element method （FEM） model of tension leveling process in the same conditions and dimensions with analytical model is also created to verify and contrast the relevant conclusions and good agreement is achieved between two models. Analysis and modeling ideas in article are equally applicable to all forms of stretch bending, tension leveler, multi-roller straightening and other similar process.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2015年第2期49-57,共9页
Journal of Mechanical Engineering
基金
国家自然科学基金(51075031)
中央高校基本科研业务费专项资金(2302011FRF-SD-12-014B)资助项目
关键词
拉弯矫直
塑性变形
浪形
解析法
有限元
tension leveling
plasticity deformation
wave-shaped
analytical method
finite element
tension leveling
plasticity deformation
wave-shaped
analytical method
finite element
