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本文分析了全异步轧制时变形区的应力状态。其应力状态是,在用全异步带张的拉直法冷轧薄带材时为轧制压力p、拉应力σ_x以及由于异步值而产生的切应力τ。此切应力不仅有清除同步轧制时“摩擦峰”的作用,而且还对轧件的塑性变形起切变作用。故其塑性方程式为:(σ_x++p)~2+4τ~2=4K~2。据此,我们推导出了全异步轧制时的轧制力公式,并用此公式计算的轧制力值同全异步轧制的实验数据进行了比较。
This paper analyzes the stress state of deformed zone during full asynchronous rolling. The stress state is the rolling pressure p, the tensile stress σ_x and the shear stress τ due to the asynchronous value when the strip is cold-rolled by full asynchronous belt tensioning. This shear stress not only eliminates the role of “friction peak” during simultaneous rolling, but also acts as a shear for the plastic deformation of the rolling stock. Therefore, the plastic equation is: (σ_x ++ p) ~ 2 + 4τ ~ 2 = 4K ~ 2. Based on this, we deduced the formula of rolling force during full asynchronous rolling, and compared the rolling force calculated by this formula with the experimental data of full asynchronous rolling.