Optimization of groove design for rolling of long products

摘要

When designing the roll grooves in long products rolling mills it is common to work backwards, i.e. start from a known outgoing workpiece geometry and search a suitable incoming geometry. This paper presents results from a design process where the incoming geometry is selected using different statistical optimization methods. Two optimization examples are shown; one conventional oval-round pass and one pass in an angle-rolling pass schedule. The geometrical parameters for the final oval-round pass in a pass schedule for rounds have been optimised and combined with a design sensitivity analysis. The calculated sensitivity to dimensional variations on the incoming material can then be used as a tool for tolerance optimization of the rolling process. For the design of rolled sections the use of FE-methods is becoming a more widely used tool. This method is however time-consuming and the number of calculations must be minimized. In this example a statistical optimization of the incoming bar to the first pass in a butterfly groove-design of angle-rolling is presented.