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Unformatted text preview: t1= feed cos(scea) cutting edge Shear angle Shear angle From Geometry: tan = r t cos / (1 r t sin ) Chip thickness ratio r t = t 1 /t 2 Uncut chip thickness or depth of cut in orthogonal machining Vc cutting velocity Rake angle Theoretical Peak to valley roughness for an Idealized Turned surface profile 4 2 2 2 2 2 f R RR R R t t + += 4 2 2 2 f R RR t t + = r Tool nose radius profile R t peak to valley roughness r f/2 feed 2 2 2 ) 2 ( ) ( f R r r t += r f R t 8 2 2245 Surface roughness as a function of feed r f R t 8 2 2245 2 2 2 2 f r r R t= Common approximation since Rt^2 is small compared with f^2 expanding 4 2 2 2 2 2 f R rR r r t t + += 4 2 2 2 f R rR t t + = 1.408mm 1.408mm 1.056 mm turned turned steel steel 1.408mm 1.408mm 0.05217mm 0.05217mm Cantilever beam deflection http://www.me.metu.edu.tr/me206/DARENDELILER/Beam_Deflection_Formulae.pdf I area moment of inertia E elastic modulus 30,000,000 psi Aluminum...
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 Winter '08
 Brown

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