Materials Science and Manufacturing Engineering Miscellaneous
- A cylinder of 25 mm diameter and 100 mm length is turned with a tool, for which the relation VT0.25 = 55 is applicable. The cutting velocity is 22 m/min. For a tool feed of 0.046 mm/rev, the number of tool regrinds required to produce 425 cylinders is
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D = 25 mm,
h = 100 mm
VT0.25 = 55
V = 22 m/min, f = 0.046 mm/ revV = πDN , N = 1000 × 22 60 π × 25
N = 280r/mmtime/piece = L = 100 = 7.76 min fN 0.046 × 280
425 piece time = 425 × 7.76 = 3299.7 minone tool life T = 
55 
1/0.25 = 55 9 = 39 V 22 ⇒ - 10 = y + y 10 No. of tool Regrinding = 3299.7 = 85 39 Correct Option: D
D = 25 mm,
h = 100 mm
VT0.25 = 55
V = 22 m/min, f = 0.046 mm/ revV = πDN , N = 1000 × 22 60 π × 25
N = 280r/mmtime/piece = L = 100 = 7.76 min fN 0.046 × 280
425 piece time = 425 × 7.76 = 3299.7 minone tool life T = 55 1/0.25 = 55 9 = 39 V 22 ⇒ - 10 = y + y 10 No. of tool Regrinding = 3299.7 = 85 39
