Metal Machining - Theory and Applications 2008 Part 11 potx

... flank, notch and nose wear (VB, VN and VS) and operation variables to current forces. The levels of VB, VN and VS, V, f and d were the inputs and F d , F f and F c were outputs of the net; and equation ... detailed and reli- able recognition of cutting states in the future. 9.5 Model-based systems for simulation and control of machining processes In this final section, t...

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... yields the D 3 and D 2 relations derived in the previous paragraph. Machine tool technology 13 Fig. 1.13 A traditional – column and knee – design and (right and below) partly-built and complete ... technology 11 Fig. 1 .11 Annual UK investment in mechanically and CNC controlled turning (•,o) and milling (+,x) machines, from UK government statistics Childs Part 1 28:3:2000 2...

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... 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 Part 1 28:3:2000 2:35 pm ... 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) and (1.8) for machi...

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... turning free-cutting steel B 1112 and difficult-to-cut 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 1112 TiC-Al 2 O 3 ... removal. Naerheim and Trent (1977) 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 diffusio...

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... 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...

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... (6.34a) S Non-orthogonal (three-dimensional) machining 189 Childs Part 2 28:3:2000 3:13 pm Page 189 where D is the area of the element; and similarly for the other strains e yy and g xy . Matrix algebra ... background 201 Childs Part 2 28:3:2000 3:14 pm Page 201 Kudo, H. (1965) Some new slip-line solutions for two-dimensional steady-state machining. Int. J. Mech. Sci. 7, 43–55. Lee...

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... 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 consideration in Section 7.3 and ... steel (the 0.36C-Cr-Mo-Ni material of Table A4.4). The Hopkinson bar equipment has established different laws for non-ferrous face centred cubic metals such as aluminium and a-brass. A mu...

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... for design and control of machining processes: (a) CAD assisted milling process simu- lator and planner (Spence and Altintas, 1994) and (b) machining- scenario assisted intelligent machining system (Takata, ... E., Smart, E. F. and Milner, D. (1970) The metallurgy of machining, Part 2. Metallurgia 81, 51–59. Yamaguchi, K. and Kato, T. (1980) Friction reduction actions of i...

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... de – and ǰ˭˭˭ 2/3s – , and de – by ds – /H′, to give 3 ds – c = ——— (A1 .11) 2 H ′s – Equations (A1.9) and (A1 .11) are known as the Levy–Mises flow laws. A1.1.3 Extended yield and flow rules, and ... 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 s...

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... 0.57, b = 0.2 Other forms have been given for a Ti-6Al-4V alloy (Usui et al. 1984) and a Ti-6Al-6V-2Sn alloy (Maekawa et al. 1994b). For the Ti-6Al-4V alloy: s — = A(e — ˘ /1000) M e aT (e — ˘ /1000) m { c ... Appendix 2 Childs Part 3 31:3:2000 10:42 am Page 362 ∂T [C] e { —— } + [H] e {T} = {F e } (A2.30) ∂t with rCV e 2111 [C] e = ——— | 1 211 | 20 112 1 111 2 ([C] is given here for...

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