T. Wanheim et al., EXTRUSION DIE FOR IN-PROCESS COMPENSATION OF COMPONENT-ERRORS DUE TO DIE-ELASTICITY, Journal of materials processing technology, 72(2), 1997, pp. 177-182
A proposed die configuration is designed to effect the in-process comp
ensation of the errors in the form of the extrudate which arise from t
he elasticity of the extrusion dies. The die is in the form of a trunc
ated, conical-shell which is either on a plane or a spherical bearing
surface, to enable it to deflect elastically, thereby changing the dim
ension of the die orifice. FE simulation of the work-material flow and
the die deflection was conducted to verify the feasibility of the pro
posed configuration. The deflection of the die is a function of the ex
trusion force and the resulting reduction of the die orifice is in pro
portion to this force. The simulation enabled optimisation of the geom
etric parameters of the die with respect to component-form errors. (C)
1997 Elsevier Science S.A.