ABSTRACT
The rolling mill Level 2 model is a substantial portion of the rolling mill Level 2 system. The Level 2 model is, in traditional sense, an expanded roll-pass design program, which creates pass schedule (draft distribution and stage plan) based on a long list of in uence parameters. One of the primary parameters the Level 2 model takes into account in creating draft schedule is the roll-separating force. For a given mill, the roll separating force is the one to determine whether the limits (force and torque, etc.) of the mill are reached. On the one hand, a higher draft is preferred to reduce number of passes and to achieve better mechanical properties (in view of controlled rolling); on the other hand, a lower draft is helpful for better shape, especially in the nish passes. The draft schedule should compromise those two con icting factors.
