Question: Problem 1. (Rule Surface Roughness) A turning operation is performed on C1008 steel (a ductile steel) using a tool with a nose radius =

Problem 1. (Rule Surface Roughness) A turning operation is performed on C1008 steel (a ductile steel) using a tool with a nose radius = 1.3 mm. Cutting speed = 61 m/min and feed = 0.27 mm/rev. Compute an estimate of the surface roughness in this operation. (Hint: the ratio of actual to ideal roughness can be read on the figure below) Ratio= Actual Theoretical 2.2 2.0 Ductile metals 1.6- Cast irons 14- 12 Free machining alloys 1.0L 0 100 30.5 200 Cutting speed-fumin 61 Cutting speed-mimin 300 400 915 122 22

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