07cutting_1_6_f - Today, February 25th 2.008 Design &...

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Today, February 25th 2.008 Design & Manufacturing ± HW#2 due before the class, #3 out on II the web after the class. ± Math Formulae, handout Spring 2004 ± Lab groups fixed, and thank you. ± group report!!! Metal Cutting I ± Metal cutting demo ± Cutting physics 2.008-spring-2004 S.Kim 1 2 2.008-spring-2004 S.Kim i 3 i 4 Material removal processes ± Cost: ± ± ± igh ± ± sun ± ± ' & ' & 2.008-spr ng-2004 S.Kim A lathe of pre WWII 2.008-spr ng-2004 S.Kim Expensive $100 - $10,000 Quality: Very h Flexibility: Any shape under the Rate: Slow i ji 5 i 6 Machined Surface µ inch 1000 ium 500 125 Fine 32 Very fine 16 8 2.008-spr ng-2004 S.Kim Kalpak an Surface roughness by machining 2.008-spr ng-2004 S.Kim Rough Med Avg. Better than Avg. 63 Extremely fine 1
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s s V F : shearing for Power c c V F : input c V F : friction via dissipated Power V t w V F u o s s s = : shearing for energy Specific V t w V F u o c f = : friction for energy Specific V t w V F V t w V F u u o s s o c f s + = + : energy specific Total i 7 Cutting processes ± ± Product quality: surface, tolerance ± Productivity: MRR , Tool wear ± Physics of cutting ± Mechanics ± Force, power ± Tool materials ± i
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This note was uploaded on 02/23/2012 for the course MECHANICAL 2.008 taught by Professor Jung-hoonchun during the Spring '04 term at MIT.

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07cutting_1_6_f - Today, February 25th 2.008 Design &...

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