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Fundamentals of Machining Processes, 2nd Edition
book

Fundamentals of Machining Processes, 2nd Edition

by Hassan Abdel-Gawad El-Hofy
August 2013
Beginner to intermediate content levelBeginner to intermediate
562 pages
16h 1m
English
CRC Press
Content preview from Fundamentals of Machining Processes, 2nd Edition
189Cutting Flat Surfaces
Solution
Given d = 30 mm, Z
c
= 8, t = 4 mm, S
z
= 0.1 mm/tooth, f = 120 mm/min,
k
s
= 1000 N/mm
2
, and l = 300, the machining time in face milling is calculated
as follows: For slot milling,
y =−=() ()15 15 0
22
mm
The total length of the workpiece travel
L
d
l
m
mm=+ += +×+ −=
2
2
30
2
23300 11 321
t
L
f
m
m
min===
321
120
268.
The milling cutter rotational speed N
N
f
SZ
==
×
=
zc
rpm
120
01 8
150
.
F
kft
N
mt
s
=
(cos cos)ϕϕ
π
12
2
F
mt
N=
××
××
=
1000 120 40 180
2314 150
1019
(cos cos)
.
V
dN
==
××
=
π
1000
31430 150
1000
14 13
.
.m/min
The mean cutting power, N
c
,
N
FV
c
mt
kW=
×
=
×
=
60 10
1 019 14 13
60 000
024
3
,.
,
.
The motor power, N
m
, becomes
N
N
m
c
m
kW== =
η
024
09
027
.
.
.
6.3.3
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Publisher Resources

ISBN: 9781466577022