The influence of lubrication on the surface finish of cold forged components

✍ Scribed by J. Monaghan; M. O'Reilly

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 912 KB
• Volume: 56
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/0924-0136(96)85113-2

✦ Synopsis

To establish the influence of lubrication on the surface finish of cold forged components a series of workpieces made of copper, alnminium and heading steel were forged within hexagonal and square shaped dies. Tests were performed under non-lubricated, or "Dry", and lubricated conditions. It was found that the surface finish was influenced by both the lubrication conditions and the particular material being forged. Under non-lubricated conditions there was a steady decrease in the surface roughness of the contact faces of the workpiece with increasing forging load, and hence less die fillout. In the case of the lubricated tests the surface fini.qh showed variations over the forging range as the lubrication conditions changed ~om hydrodynamic to boundary type with increased deformation. It was also found that the tendency for tool/workpiece adhesion to occur was dependent on the particular material being forged.

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