Acta Mechanica Slovaca 2011, 15(1):36-43 | DOI: 10.21496/ams.2011.005

Wasteless Splitting of Metal Round Bars Basing on Cross-Wedge Rolling Process

Arkadiusz Tofil, Zbigniew Pater

This paper presents research works on a new method of wasteless splitting of metal round bars. This method is connected with rolling on the bar circumference of a groove in the shape of letter V, and, later, on repeated rotary bending of the bar separate part, leading to the metal cracking. Special tools sets, in which a flat-wedged rolling mill LUW-2 used at the Lublin University of Technology was equipped with, were applied in the splitting process. A typical set includes: mounting, cutting knife and bending pad. Laboratory tests confirmed the effectiveness of the worked out splitting method. This process was also analyzed theoretically, basing on finite element method (FEM). In calculations, the influence of process basic parameters on the cracking process was analyzed: knife forming angle, rolled groove depth, bending angle and length of the cut bar part. The possibility of brittle fracture (on the basis of Saint-Venant hypothesis) and ductile fracture (on the basis of Cockroft-Latham) presence was analyzed.

Keywords: Bar Splitting, Cross-Wedge Rolling, Experiment

Published: March 31, 2011  Show citation