变厚度轧制轧件水平速度变化规律

为了揭示变厚度轧制过程轧件水平速度与轧辊垂直移动速度之间的关系，从分析变厚度轧制微元体变形入手，利用体积不变条件，建立了变厚度轧制变形区轧件水平速度关系微分方程(VGR-V方程).在给定的边界条件下对VGR-V方程进行了求解，得到了计算变形区轧件水平速度的表达式，同时验证了变厚度轧制同一时刻变形区轧件各断面秒流量不相等.给出了变厚度轧制过程的轧件水平速度分布的典型算例，从中可见各工艺参数对轧件水平速度的影响规律.该研究结果为变厚度轧制变形参数和力能参数求解提供了基础.

Research on Variation of Work Piece Horizontal Velocity for Variable Gauge Rolling

To reveal the relationship between the work piece horizontal velocity and roll vertical velocity during variable gauge rolling (VGR), the differential equation of work piece horizontal velocity (equation VGR-V) was set up by keeping material volume. Then it was solved under the VGR boundary conditions, and the formula to calculate the work piece horizontal velocity was obtained. Furthermore, it was proved that equal discharge per second condition (EDSC) no longer fits VGR processes. Some typical examples were given, so that the influence of technological parameters on the work piece horizontal velocity was presented. It provided a theoretical basis for researching on deformation parameters and mechanical parameters in VGR processes.