Metal Machining - Theory and Applications Episode 1 Part 2 pps
Metal Machining - Theory and Applications Episode 1 Part 2 pps
... lathe; 1 min
12 x 12 x 4 3.00–6.00 1. 10 1. 90 for insert tooling on turning
25 x 25 x 7 9.00 11 .20 2. 65–3 .20 centre
ceramic insert, plain
12 x 12 x 4 4.50–9.00 1. 50 2. 70
25 x 25 x 7 13 .50 17 .00 ... 0.85;
n
s
= 2 n
s
= 2 n
s
= 2 n
s
= 3
Mechanical 1 kW 6000 0. 028
Simple CNC 1 kW 20 000 0.0 92 0.060
5 kW 28 000 0 .13 0.086
15 kW 50000 0 .23 0 .15
Turning...
Metal Machining - Theory and Applications Episode 1 Part 8 ppsx
... sintered steel and
Inconel 718
0.05
0. 02
0 .1 0 .2 0.5 1. 0 2. 0
5
10
20
40
60
80
99
85
Flank wear VB (mm)
P10
Sintered steel
P10
B 111 2
TiC-Al
2
O
3
ceramic
Inconel 718
VB
max
B 1 12 - P10, V = 20 0m/min, ... of
13 4 Tool damage
10 00 20 00 5000 10
4
2x10
4
5x10
4
99
90
70
50
30
10
3
1
Machine tool A
Machine tool B
Numbers of impact until tool fracture
Cuttin...
Metal Machining - Theory and Applications Episode 1 Part 10 ppt
... 6.4.8.
Non-orthogonal (three-dimensional) machining 18 1
Fig. 6 .15 Uncut chip cross-sections in single point turning: (a) case 1, (b) case 2, (c) case 3 and (d) case 4
(a)
Childs Part 2 28:3 :20 00 3 : 12 ... r
n
centred on C
2
and point
7 is displaced from point 6 by t
1e
in the chip flow direction. Thus
Non-orthogonal (three-dimensional) machining 19 1
Childs Part 2 2...
Metal Machining - Theory and Applications Episode 1 Part 9 pptx
... Palmer and Oxley
(19 59), and (b) Roth and Oxley (19 72)
Childs Part 2 28:3 :20 00 3 : 12 pm Page 16 9
Harris, A., Hastings, W. F. and Mathew, P. (19 80) The experimental measurement of cutting temper-
ature. ... (Reichenbach, 19 58), on the tool flank
Temperatures in machining 15 3
Fig. 5 .20 Radiation from a black body
Childs Part 2 28:3 :20 00 3 :11 pm Page 15 3
(Ch...
Metal Machining - Theory and Applications Episode 1 Part 7 ppt
... min
1
,
d
= 1. 0 mm,
f
= 0 .19 mm rev
1
, t = 1 min; (e) tool: cemented carbide
P10,
v
= 15 0 m min
1
,
d
= 0.5 mm,
f
= 0 .1 mm rev
1
,
t
= 2 min.
Childs Part 1 28 :3 :20 00 2: 41 pm Page 12 0
takes ... carbon steel with a P10 cemented carbide tool,
after Yamane and Narutaki (19 83)
d :1. 0 mm, f: 0 .2 mm tooth
-1
Real cutting time: 1. 9 min
0. 01
0 .1
1...
Metal Machining - Theory and Applications Episode 1 Part 6 pdf
... [10
–6
K
1
] modulus [GPa] 10 0°C 10 00°C
TiC 7.4–7.7 ≈ 450 24 –33 38– 41
TiN 9.4 ≈ 25 0 19 – 21 25 26
Al
2
O
3
8.4–9.0 ≈ 400 20 28 6–7.5
WC-Co* 4.5–6.0 550–650 75 12 0 50–75
WC-TiC-TaC-Co* 5.8–6.8 490–560 25 –55 ... 7.6–8.0 370–395 18 0–330
Al
2
O
3
/SiC(wh.) 10 –35 ≈3.4* 7.0–7.5 345– 425 300–500
Si
3
N
4
/Sialon 15 –30 2 .1 2. 3 3 .2 3.6 28 0– 320 650 15 00
HSS 19...
Metal Machining - Theory and Applications Episode 1 Part 5 potx
... Carbide
CVD coated 0 .2 0.5 3–7 1. 2 1. 9 2. 8 1. 8
Ground 0 .1 0 .25 2 4 1. 2 1. 9 2. 8 1. 8
Super-finished 0.03 0.4 1. 2 1. 9 2. 8 1. 8
Childs Part 1 28 :3 :20 00 2: 38 pm Page 73
2. 4.3 Wear in metal cutting
Finally, ... map
Childs Part 1 28 :3 :20 00 2: 38 pm Page 78
and PE
2
in Figure 2. 25. PE
1
represents theoretical analyses (Appendix 3) when t...
Metal Machining - Theory and Applications Episode 1 Part 4 pot
... ≈ 2. 5 ≈ 4.0 ≈ 2. 2
k/
ρ
C 11 0 22 0 85 14 0 50 16 0 12 0 20 0 22 0– 320
∆T
1
[°C]
a
23 0–470 18 0–300 11 0–340 25 0–430 470–680
K
work
[W/m K] 25 –45 10 0–400 10 0–300 15 20 6 15
K
tool
b
[W/m K] 20 –50 80 12 0 ... [
U
work
f
tan
φ
/
κ
]; (b) iso-
β
lines
(
β
= 0 .15 and 0.3) mapped onto a (
U
work
,
f
) plane for
κ
= 3, 12 and 50 mm
2
/s and
φ
= 25 º
Childs...
Metal Machining - Theory and Applications Episode 1 Part 3 pot
... data.
52 Chip formation fundamentals
Fig. 2 . 12 A range of possible rake face contact pressure distributions
σ
n
/
k
, for
α
= 0º,
φ
= 10 º and
λ
= 35º and
n
=
(a) 1/ 2, (b) 1/ 3 and (c) 1/ 6
Childs ... ferrous and
non-ferrous chips observed through a microscope at about five times magnification (Figure
Fig. 2 .1 Early chip observations by (a) Tresca (18 78) and (b...
Metal Machining - Theory and Applications Episode 1 Part 1 potx
... in machining 82
3 .2 Tool materials 97
References 11 7
4 Tool damage 11 8
4 .1 Tool damage and its classification 11 8
4 .2 Tool life 13 0
4.3 Summary 13 4
References 13 5
5 Experimental methods 13 6
5 .1 ... technology 11
Fig. 1. 11 Annual UK investment in mechanically and CNC controlled turning (•,o) and milling (+,x) machines, from
UK government statistics
Childs P...
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