An optimum design on rollers containing the groove with changeable inner diameter based on response surface methodology

Abstract

In order to realize the precision plastic forming of the revolving body component with changeable wall thickness, a kind of roller containing grooves with changeable inner diameter is put forward, as the forming mould of the technology of rolling-extrusion. Specifically, first, the arc length of the groove in the roller is designed according to the prediction on the forward slip value during the process of forming, to make accurate control of the actual length of the forming segments; then, to obtain better parameters of the roller structure, a second-order response surface model combining finite element numerical simulation and response surface methodology was put forward, taking the factor of forming uniformity as evaluation index. The result of the experiment shows that, for the formed component, not only the size can meet the needs but also each mechanical property index can be greatly improved, which verify the rationality of the forward slip model and the structural parameter of the optimum model based on the response surface methodology.

Geometric Accuracy Design Method of Roller Cavity Surfaces for Net-Shape Rolling Compressor Blades

“…The rolling cavity is a varied and semi-closed gap between a pair of rotated roller, and cavity surfaces are enwound from component's profiles. Zhao et al [17] designed the arc length of groove of roller based on predicted forward slip value for rolling a revolving component with changeable thickness. Most of the roller for rolling complex components is achieved by trial and error.…”