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Determine the Machining Time in Milling Operation
An HSS slab mill of 100 mm diameter and 150 mm width is used on a Horizontal milling machine to mill C50 steel. The milling cutter has 8 teeth. Determine the machining time assuming that the entire stock can be removed in one depth of 2 mm. The cutting speed V = 20 m/min and feed rate f = 0.13 mm/tooth. The cut length = 150 mm.
Solution
Given Z = 8
D = 100 mm
d = 2 mm
V = 20 m/min
f = 0.13 mm/tooth
Approach distance A =
Spindle speed
N = (1000 × 20) / (π× 100 )= 63.66 ≅ 65 rev/min
Time for machining t = (l + 2 × A)/ f z n = (150 + 2 × 14) / (0.13 × 8 × 65)
= 2.633 min.
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