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介绍了蛇形轧制的实现方式。运用数值模拟方法,在Deform 3D上分析单道次轧制过程中蛇形轧制和对称轧制7075铝合金厚板的流动速度及应力应变分布情况,分析异速比、上下轧辊错位量和压下量对蛇形轧制变形区内轧板等效应变和剪切应变的影响规律。结果表明:蛇形轧制中,由于下辊速度快,轧板下层金属流动比上层快,蛇形轧制中轧板下层等效变形大于上层,且随着异速比的增大,上下层金属变形差距增大;对称轧制中厚板心部的剪切应变几乎为0,蛇形轧制中由于有“搓轧区”的存在,厚板心部的剪切应变远大于对称轧制的,且随着异速比的增加和错位量的增加,轧板心部的剪切变形增大。这种附加的剪切变形有利于使变形向厚板心部渗透,从而改善厚板高向变形的不均匀性。
The realization of serpentine rolling is introduced. The numerical simulation method was used to analyze the flow velocity and stress-strain distribution of the serpentine and symmetrical-rolled 7075 aluminum alloy plate during the single pass rolling on Deform 3D. The analysis of the different speed ratio, upper and lower roll displacement and pressure Effect of Lower Quantity on Equivalent Strain and Shear Strain of Rolled Sheet in Serpentine Rolling Deformation Area. The results show that in the serpentine rolling, due to the lower roller speed, the flow of the lower metal in the rolling plate is faster than the upper one. The equivalent deformation of the lower plate in the serpentine rolling is larger than that of the upper one. With the increase of allotment ratio, The difference of metal deformation increases; the shear strain in the center part of the symmetrical rolled plate is almost zero, and the shearing strain in the heart part of the thick plate is much larger than the symmetry due to the existence of “rubbing-rolling zone” in the serpentine rolling Rolled, and with the increase of allotment ratio and the amount of dislocation, the shear deformation of the core of the rolled sheet increases. This additional shear deformation helps to infiltrate the deformation to the center of the slab, thus improving the high-dimensional deformation of the slab.