Metal Machining - Theory and Applications 2008 Part 7 pptx
Metal Machining - Theory and Applications 2008 Part 7 pptx
... 1 978 ;
Usui and Hirota, 1 978 ; Arsecularatne et al., 1995). This section introduces the further
Non-orthogonal (three-dimensional) machining 177
Childs Part 2 28:3:2000 3:12 pm Page 177
kgt
av
U
chip
l ... (6.9b) and
(6.13) may be used to investigate the strain, strain-rate and temperature dependence of
flow in the primary shear zone. Stevenson and Oxley (1969 70 , 1 970 71 )...
Metal Machining - Theory and Applications 2008 Part 10 pptx
... Figure 9 .7( a) and the flank contact temperatures and stresses in Figure 9 .7( b)
Process models 277
Childs Part 3 31:3:2000 10: 37 am Page 277
Johnson, W. and Kudo, H. (1962) The Mechanics of Metal ... for design and control of machining processes: (a) CAD assisted milling process simu-
lator and planner (Spence and Altintas, 1994) and (b) machining- scenario assiste...
Metal Machining - Theory and Applications 2008 Part 1 potx
... 159
6.2 Slip-line field modelling 159
6.3 Introducing variable flow stress behaviour 168
6.4 Non-orthogonal (three-dimensional) machining 177
References 1 97
7 Finite element methods 199
7. 1 Finite ... 305
9.5 Model-based systems for simulation and control of machining
processes 3 17
References 324
Appendices
1 Metals’ plasticity, and its finite element formulation 328
A1.1 Yield...
Metal Machining - Theory and Applications 2008 Part 2 pps
... 0.092
M
w
[£/min] 0. 27 0. 27 0. 27
C
t
[£] 15 15 15
Fig. 1.28 Times and costs to remove metal by milling, for the conditions i and ii of Table 1 .7 compared with remov-
ing the same metal by turning (- - -)
Childs ... that the orga-
nizational gains of cell-oriented and FMS organization bring real benefit.
1.4.3 Milling and drilling times and costs
Equations (1 .7...
Metal Machining - Theory and Applications 2008 Part 5 ppsx
... removal.
Naerheim and Trent (1 977 ) have proposed that the wear rates of both WC-Co (K-grade)
and WC-(Ti,Ta,W)C-Co (P-grade) cemented carbides are controlled by the rate of diffusion
of tungsten (and Ti and ... is
Tool damage and its classification 125
WC-Co cemented carbide tools
WC-(Ti, Ta, W)C-Co cemented
carbide tools
Fig. 4 .7 Model of diffusion wear, after Naerheim and Tren...
Metal Machining - Theory and Applications 2008 Part 6 pot
... the EMF generated. Standard material
combinations are copper-constantan (60%Cu–40%Ni), chromel (10%Cr–90%Ni)–alumel
(2%Al–90%Ni-Si-Mn) and platinum–rhodium. In metal machining applications, it is
possible ... between the parts is a slip-line. Thus, in machining, the boundaries between
the primary shear zone and the work and chip and between the secondary shear zone and
the chi...
Metal Machining - Theory and Applications 2008 Part 8 pdf
... cutting fluid action (Usui et al., 1 977 ), built-up-edge formation (Usui
et al., 1981) and more recently in studies of low alloy semi free -machining steels (Childs and
Maekawa, 1990). It is given further ... element solu-
tions in the fully plastic range. Comp. Meth. Appl. Mech. Eng. 4, 153– 177 .
Obikawa, T. and Usui, E. (1996) Computational machining of titanium alloy – finite el...
Metal Machining - Theory and Applications 2008 Part 11 potx
... Applicability
1 C** 5 4 3 0 .78 56
2* K 16 04 08 0 .75 34
3 C** 5 4 3 0 .70 27
4 C** 5 4 3 0 .70 27
*: this is coded in ISO standard; **: types of chip are different.
Childs Part 3 31:3:2000 10:39 am Page ... design and control of machining processes and to
give solutions to rather complicated processes.
Model-based systems for simulation and control 3 17
Table 9 .7( b) Abbreviat...
Metal Machining - Theory and Applications 2008 Part 12 pps
... Sci. 7, 43–55.
Johnson, W. and Mellor, P. B. (1 973 ) Engineering Plasticity. London: van Nostrand.
Johnson, W., Sowerby, R. and Venter, R. D. (1982) Plane-Strain Slip-Line Fields for Metal-
Deformation ... Oh, S-I. and Altan, T. (1989) Metal Forming and the Finite Element Method. New
York: Oxford University Press.
Kudo, H. (1965) Some new slip-line solutions for two-dimentional...
Metal Machining - Theory and Applications 2008 Part 13 pot
...
(
e
T+ 273
)(
——
)
e
–
N
(A4.1b)
1000
Coefficients A, B, M, m and N for the following annealed metals are as follows.
Metal ABM m N
Aluminium 1 07 153 0.0 57 0.064 0.3
a-brass 72 0 56 .7 0.024 0.06 0.5
A4.3.2 Pearlitic carbon and low alloy steels
In ... 200–225 190–220 –
2000 to 70 00 series 120–190 160–200 170 –210
Al-Si cast alloys 170 –190 170 –190 – – –
Copper
pure copper* 38...
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