Influence of Friction Coefficient on Workpiece Roughness in Ring Upsetting Process
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چکیده
In forming processes contact friction significantly influence metal flow, stress-strain state and process parameters. Furthermore, tribological conditions influence workpiece surface quality and its dimensional precision. This paper presents research results of the influence of contact friction coefficient on a workpiece surface quality in ring upsetting by flat plates. Workpiece surface roughness is measured using atomic force microscope. Ring upsetting experiments are conducted with ion implanted and nonimplanted dies.
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