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一、前言为了增强轧机的板形控制机能,各种新型板带轧机相继问世。WRS轧机(WorK rollshifting mill)就是其中的一种。该轧机具有工作辊弯辊与工作辊轴向移动两种板形控制功能,实验与计算结果一致表明,与四辊轧机相比较,该轧机具有更强的板形控制能力。二、支承辊强度的可靠性分析所谓支承辊强度,包括静强度,疲劳强度和接触强度。在传统的轧辊设计方法中,一般但是,由于工作辊的轴向移动,使辊系受力与变形不再以轧机中心线为对称轴左右对称,而是以板材中心实现点对称(见图1)。辊系的这种受力特点是否会影响轧辊的机械强度呢?为此本文采用可靠性设计理论对WRS轧机在对称轧制状态(相当于四辊轧机),与非对称轧制状态下的支承辊强度进行可靠度分析与比较。
I. Introduction In order to enhance the mill shape control function, a variety of new strip mill have come out. WRS rolling mill (WorK rollshifting mill) is one of them. The mill has two kinds of plate-shaped control functions: the work roll bending roll and the work roll axial movement. The experiment and calculation results show that the rolling mill has stronger shape control ability compared with the four-roll rolling mill. Second, the reliability of the support roller strength The so-called support roller strength, including static strength, fatigue strength and contact strength. In the conventional roller design method, however, due to the axial movement of the work rolls, the stress and deformation of the roller system are no longer symmetrical about the symmetry axis of the rolling mill centerline but are symmetrical at the center of the plate (see FIG. 1 ). Whether the force characteristics of the roller system will affect the mechanical strength of the roller? To this end, the reliability design theory for the WRS mill in the symmetrical rolling state (equivalent to four-high rolling mill), and asymmetrical rolling support Roller strength reliability analysis and comparison.