万能轧制过程轧件相对立辊前滑的理论和实验研究  

The theoretical and experimental research on the forward slip between the vertical roll and the rail in rail universal rolling

作　　者：宋剑锋[1] 张文志[1] 董永刚[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004

出　　处：《塑性工程学报》2010年第1期119-122,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50775196);高等学校博士学科点专项科研基金资助项目(20070216006);河北省自然科学基金基地专项资助项目(08B017)

摘　　要：为便于钢轨万能轧制过程解析计算,将轧制轨头立辊合理简化为平辊,并且将钢轨断面形状等效为工字形断面。基于立辊的力矩平衡条件,推导出轨头、轨底变形区的中性角公式,并根据秒流量相等理论,推导出轨头和轨底相对于立辊的前滑系数公式。为验证理论模型,在燕山大学实验室的万能轧机上完成了18kg/m轻轨的万能热轧实验,用压痕法实测了不同轧制规程时轨头和轨底相对于立辊的前滑系数。通过对比,理论模型计算结果与实验结果比较接近,可以用于钢轨万能轧制过程前滑预测。For analyzing the process of rail universal rolling more easily, the vertical roll with box pass was simplified rationally as an equivalent flat roll, and the cross-section profile of original rail was substituted by an equivalent I-section. Based on the torque-equilibrium condition of vertical rolls, the equations of neutral angle were derived. The forward slip coefficient between the vertical roll with the base and head of rail were derived based on the law of constant rate of flow. For verifying the theoretical model, the rolling process of 18kg/m light rail was simulated by the Rigid-plastic FEM, and the corresponding universal rolling experiments were accomplished in Yanshan University Rolling Laboratory. Compared with the simulation results and measuring results, the theoretical results are accurate enough to predict the forward slip coefficient.

关 键 词：钢轨 万能轧机 中性角 中性线 前滑 实验 

分 类 号：TG331[金属学及工艺—金属压力加工]