DYNAMIC EFFECTS DURING A HIGH-SPEED SINTER-FORGING PROCESS

The paper reports on an investigation into the various technological a spects of a high-speed sinter-forging process. Experiments were conduc ted and measurements were made in the development of barrelling, strai n variations at the free surface and densification during dry and lubr icated high-speed cold forging of sintered copper powder discs. The re lationship between the frictional stress at the interface and other pr ocess variables is discussed and an analysis is given for the calculat ion of pressure distribution and die load by the solution of the equat ions of equilibrium taking barrelling into consideration for axial sym metry and plane strain sinter-forging conditions. Results are discusse d critically to illustrate the interaction of various processing param eters involved during high-speed sinter-forging process and are presen ted graphically. Copyright (C) 1996 Elsevier Science Ltd