Lubricants for cold forging operations do not\nonly enable a reliable forging process, but also affect the\nresults of forging processes. A sound lubrication decreases\nthe occurring forces and may result in a smooth specimen\nsurface. However, some lubricants are known to increase\nthe initial surface roughness of the specimen as a consequence\nof the forming. Therefore, the decision which lubricant\nshould be used is of special interest for near-net\nshape operations. The paper at hand presents the results of\na finite element investigation of the first stage of an industrial\nrod extrusion process which was investigated with\ntwo different lubrication systems. The numerical investigations\nfocus on a reliable prediction of the development of\nthe surface roughness in due consideration of the lubricant.
Loading....