考虑非均匀应力分布的大型筒节轧制力计算模型

发布时间：2018-08-24 10:40

【摘要】：为了准确计算筒节轧制力,建立一种基于切块法的考虑筒节不均匀应力分布的轧制力计算模型。根据轧制过程中筒节和轧辊的几何关系,精确计算筒节内外表面的接触弧长;根据筒节非对称轧制条件,考虑非均匀分布的张应力和切应力,建立筒节轧制变形区(前滑区、搓轧区和后滑区)的力平衡微分方程;基于有限元软件Marc研究大型筒节轧制的轧透性条件。对某厂3 700 mm筒节轧机典型产品进行仿真,结果表明模型计算结果与实测结果误差小于10%,满足工业应用要求;为了满足轧制过程稳定性和异步轧制条件,筒节轧制压下量Δh20 mm,上下轧辊速比1v2/v11.02;上下轧辊速比对平均切应力影响较大,压下量对平均切应力的影响较小。
[Abstract]:In order to calculate the rolling force of cylinder nodal accurately, a rolling force calculation model considering the uneven stress distribution of cylinder nodal is established based on cutting method. According to the geometric relationship between the tube and roll during rolling, the contact arc length of the inner and outer surface of the tube is accurately calculated, and the deformation zone of the tube is established according to the asymmetric rolling conditions of the cylinder and considering the non-uniform distribution of tensile stress and shear stress (forward slip zone). Based on the finite element software Marc, the rolling penetration conditions of large tube knots are studied. The typical products of 3 700 mm tube knots mill in a certain factory are simulated. The results show that the error between the model calculation results and the measured results is less than 10, which meets the requirements of industrial application, in order to satisfy the rolling process stability and asynchronous rolling conditions, The rolling speed ratio 螖 h 20 mm, is 1 v 2 / v 11.02, and the speed ratio of upper and lower rollers has a great effect on the average shear stress, while the reduction has little effect on the average shear stress.
【作者单位】：燕山大学国家冷轧板带装备及工艺工程技术研究中心;
【基金】：国家自然科学基金(51305388) 河北省高等学校拔尖人才计划(BJ2014055)资助项目
【分类号】：TG331

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