Theoretical method for estimation of mean pressure on contact area between rolling tools and workpiece in cross wedge rolling processes

The paper gives a new method no determine the mean unit contact pressures on a material-tool contact surface in cross wedge rolling processes (CWR). The dependencies worked out on the basis of the energy and the upper bound methods permits rolling forces to be determined which are comparable to experimentally measured ones. The analysis provides equations which relate the mean contact pressure q(m) to the basic process parameters, namely the forming angle alpha, the spreading angle beta, the relative reduction of a portion delta and the shear friction factors m and m(k). Copyright (C) 1996 Elsevier Science Ltd.