Consider the selection of two cutting conditions for turning - the cutting speed, v, and the feed, f - based upon the minimum production time criterion and the surface finish. The cutting tool is a new coated carbide cutting tool. It has a tip radius of 0.4 mm and the following Taylor's equation, where n = 0.35, T R = 80 seconds/edge and VR = 2 m/s. The "R" subscript refers to base conditions that are used to define the Taylor's equation. Terms without subscripts are the actual conditions. (T): ("he fl 1) The workpiece is 300 mm long and has an initial diameter of 50 mm. The depth of cut is 4 mm. Determine the following: a) The largest feed so that Rt S 0.56 um. (10 points) b) Based upon experimental studies, it takes 75 seconds to unload, set up and load a workpiece. It takes 12 seconds to change a cutting edge. The rate charged for all costs excluding tooling is $0.01/second. The cost of tooling is $6.50/edge. Determine the speed (m/s) for the minimum production time. (10 points) 0) For the cutting conditions specified, determine the power (W) at the spindle to perform this cut. The specific cutting energy for this combination is 0.94 J/mm3. Note 1 W = l J/s. (10 points) hsm HI) mm at cu!— um:

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Solution To determine the largest feed so that the surface finish is 056 um we can use the following ... View the full answer