surface, the tolerance may be ( Part II, Answer Questions (8 x3-24 Marks) 38. A

Question

surface, the tolerance may be ( Part II, Answer Questions (8 x3-24 Marks) 38. A round bot-rolled bar with an sneven oxidized layer is being machined on a lathe. Would you ? 39. Please analyze the following figure. min 50 100 150 200 250 (HB) Ferrite Pearlite 20% 80+ 80% 2 As cast 215 4060 ?Ascast 207 ?Annealed 183 5 Annealed 170 100 40F 100 300 500 700 900 Cutting speed (umin) 40. Please the reason of the punch shape in shearing: from the flat punch surface to bevel to double-bevel and convex Punch

Explanation / Answer

SOLUTION:(36)
(A) Cylindricity

EXPLAINATION:Cylindricity tolerance specifies a tolerance zone consisting of an annular space between

two co-axial cylinders having a difference in radii equal to the specified tolerance.  

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