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Unformatted text preview: (b) Determine the total machining cost at the optimal cutting speed determined in part (a). 3. A slabmilling operation is being carried out on a 20 in. long, 6 in. wide high strength steel block at a feed of 0.01 in./tooth and depth of cut of 0.15 in. The cutter is 3 in. in diameter and has 8 cutting teeth, and rotates at 150 rpm. Calculate the material removal rate and cutting time, estimate the power required. Assume the specific cutting energy for this material is 2.1 hp ⋅ min/in 3 . 4. Read section 26.3 and answer the following questions. (a) Textbook problem 26.36. (calculate chip length and thickness). (b) For the problem defined in (a), the workpiece material is cast iron. The specific grinding energy of this material is assumed to be 10 hp . Determine the tangential grinding force. 3 min/ in ⋅...
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This document was uploaded on 12/25/2011.
 Fall '09

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