In a turning operation on stainless steel, cutting speed = 150 m/min, feed = 0.25 mm/rev, and depth of cut = 7.5 mm. How much power will the lathe draw in performing this operation if its mechanical efficiency = 90%. Use Table 17.2 to obtain the appropriate specific energy value.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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In a turning operation on stainless steel, cutting speed = 150 m/min, feed = 0.25 mm/rev, and depth of cut =7.5 mm.
How much power will the lathe draw in performing this operation if its mechanical efficiency = 90%. Use Table
17.2 to obtain the appropriate specific energy value.
Transcribed Image Text:In a turning operation on stainless steel, cutting speed = 150 m/min, feed = 0.25 mm/rev, and depth of cut =7.5 mm. How much power will the lathe draw in performing this operation if its mechanical efficiency = 90%. Use Table 17.2 to obtain the appropriate specific energy value.
Specific Energy U or Unit Power P
N-m/mm
Material
Brinell Hardness
Carbon steel
150-200
1.6
201-250
2.2
251-300
2.8
Alloy steels
200-250
2.2
251-300
2.8
301-350
3.6
351-400
4.4
Cast irons
125-175
1.1
175-250
1.6
Stainless steel
150-250
2.8
Aluminum
50-100
0.7
Aluminum allovs
100–150
0.8
Brass
100–150
2.2
Bronze
100-150
2.2
Magnesium alloy
50-100
0.4
Transcribed Image Text:Specific Energy U or Unit Power P N-m/mm Material Brinell Hardness Carbon steel 150-200 1.6 201-250 2.2 251-300 2.8 Alloy steels 200-250 2.2 251-300 2.8 301-350 3.6 351-400 4.4 Cast irons 125-175 1.1 175-250 1.6 Stainless steel 150-250 2.8 Aluminum 50-100 0.7 Aluminum allovs 100–150 0.8 Brass 100–150 2.2 Bronze 100-150 2.2 Magnesium alloy 50-100 0.4
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