Mróz Sebastian
钢铁研究学报(英文版)
Change in the temperature of band over its length, associated with the stock being non-uniformly heated in the furnace, influences the variations in the magnitudes of energy-force parameters. Using the FEM (Finite Element Model) programs for the computation of the values of the energy-force parameters can take into account the distribution of temperature over the band length. The mathematical model of the computer program Forge2008 was used to theoretically examine the energy-force parameters and plastic metal flow in the roughing stands of the continuous rolling mill. The results of experimental investigation of influence of the non-uniform temperature distribution were presented on the metallic charge length on the energy and force parameters and dimensions of the band during round bars rolling. Thermovision monitoring energy and force parameters monitoring were carried out in continuous rolling mill D350 in one of the Polish industrial plants. On the basis of obtained results, it could be stated that non-uniform distribution of temperatures along the charge length causes local increase of energy and force parameters values and also such distribution affects the local increase of the width of rolled band. The rolling process of charge with non-uniform distribution of temperature could lead to exceeding required dimensional tolerances of the final products.
关键词:
groove-rolling
,
energy parameter
,
force parameter
,
numerical technique
,
FEM
孟启星，孙登月，许石民
钢铁
辊型结构改进目的在于在保证矫直精度前提下使凹辊对研究范围内管材表层形成的2条螺旋滚光带良好衔接，减轻滚光带之间间隙与重叠量。基于二辊矫直机凹辊对管材滚光原理，对凹辊辊型结构进行了改进，增加了专用滚光区；建立了辊型曲线滚光区长度计算的数学模型。在经过有限元试算、辊型曲线修正、有限元精算三步后，研究结果证明：辊型结构改进后，在保证矫直精度前提下，凹辊对研究范围内管材滚制所成2条滚光带重叠状况有了明显改善，表层塑性应变值由改进前的0.03~0.08降至了改进后的0.03~0.05左右。
关键词:
二辊矫直机
,
polishing
,
concave roll
,
value of plastic strain
,
FEM
孙静娜
,
薛涛，杜凤山
钢铁
为了深入研究六辊CVC轧机的带钢凸度控制能力，采用非线性弹塑性有限元法，利用大型非线性有限元软件MSC.Marc建立了六辊CVC轧机轧制过程三维有限元仿真模型。模型将辊系弹性变形与轧件弹塑性变形耦合在一起，进行统一建模与分析。运用该模型分别改变工作辊弯辊力、中间辊弯辊力、中间辊横移量进行有限元模拟，得到了工作辊弯辊、中间辊弯辊、中间辊横移对接触应力和带钢凸度控制的影响规律。所建模型与分析结果可为六辊CVC轧机的板形控制研究提供理论数据与参考依据。
关键词:
六辊
,
CVC
,
contact stress
,
crown control
,
FEM
