Metal Machining - Theory and Applications 2008 Part 1 potx

... cutting process (Part 1) . Trans. ASME J. Eng. Ind. 10 0, 22 2 22 8. Usui, E. and Hirota, A. (19 78) Analytical prediction of three dimensional cutting process (Part 2) . Trans. ASME J. Eng. Ind. 10 0, 22 9 23 5. Usui, ... developments 21 1 Fig. 7 .11 Three-dimensional non-steady chip formation by rigid plastic finite element method (Ueda et al ., 19 96): (a) initial model and...

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... h c Non-orthogonal (three-dimensional) machining 18 7 Childs Part 2 28:3:2000 3 :13 pm Page 18 7 18 2 Advances in mechanics (b) (c) Fig. 6 .15 continued Childs Part 2 28:3:2000 3 :13 pm Page 18 2 is ... 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)...

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... Palmer and Oxley ( 19 59) , and (b) Roth and Oxley ( 19 72) Childs Part 2 28:3:2000 3 :12 pm Page 16 9 Harris, A., Hastings, W. F. and Mathew, P. ( 19 80) The experimental measurement of cutting temper- ature. ... Smart, E. F. and Milner, D. ( 19 70) The metallurgy of machining, Part 1. Metallurgia 81, 3 10 . 15 8 Experimental methods Childs Part 2 28:3:2000 3 :11 pm P...

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... sintered steel and Inconel 7 18 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 7 18 VB max B 112 - P10, V = 200m/min, ... 0.1mm/rev Sintered steel - P10, V = 200m/min, d = 0.5mm, f = 0.1mm/rev Inconel 7 18 - Al 2 O 3 -TiC ceramic, V = 200m/min, d = 0.5mm, f = 0 .19 mm/rev Cumulative...

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... and has been studied over many years, by Dawihl (19 41) , Trent (19 52), Trigger and Chao (19 56), Takeyama and Murata (19 63), Gregory (19 65), Cook (19 73 ), Uehara (19 76 ), Narutaki and Yamane (19 76 ), ... (min) 15 0 m min -1 15 0 m min -1 236 m min -1 Turning Milling 236 m min -1 Crater depth ( àm) Depth of cut :1. 0mm Feed rate: 0.2 mm rev -1 Flank wear...

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... Boothroyd and Knight, 19 89) Fig. 1. 19 The spectrum of manufacturing systems (after Groover and Zimmers, 19 84) Childs Part 1 28:3:2000 2:34 pm Page 18 If Figure 1. 16(b) is compared with Figure 1. 8(b) ... Introduction 15 9 6.2 Slip-line field modelling 15 9 6.3 Introducing variable flow stress behaviour 16 8 6.4 Non-orthogonal (three-dimensional) machining 17 7 Refere...

Ngày tải lên: 12/08/2014, 02:22

... cell-oriented 0.15 0 .27 2. 50 g* insert ceramic centre CNC/15 FMS* 0 .22 0.34 2. 50 Fig. 1 .27 Costs associated with the examples of Figure 1 .26 , a–g as in Table 1.6 Childs Part 1 28 :3 :20 00 2: 35 ... mm 2 [ α n c fd] = 1 mm 2 [ α n c fd] = 0.5 mm 2 V vol [mm 3 ] 960 29 5000 29 5000 f mach 0.65 0.65 0.65 n c fd [mm 2 ]2 4 2 C [m/min] 180 150 180 n 0 .25 0 .25 0 .25 t...

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... 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 diffusion of tungsten (and Ti and ... 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 B1112 TiC-Al 2 O 3 ceramic Inconel 718 VB max B112 -...

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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 ... 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 chip are s...

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... 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 )...

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... and quenching high strain rate test (after Shirakashi et al. , 1 983 ) Childs Part 2 28: 3:2000 3:15 pm Page 221 2 28 Applications of finite element analysis Fig. 8. 1 continued Childs Part 2 28: 3:2000 ... built-up-edge formation (Usui et al., 1 981 ) and more recently in studies of low alloy semi free -machining steels (Childs and Maekawa, 1990). It is given further conside...

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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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... 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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... 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 steady state machining. ... 43–55. Johnson, W. and Mellor, P. B. (1973) Engineering Plasticity. London: van Nostrand. Johnson, W., Sowerby, R. and Venter, R. D. (1982) Plane-Strain Slip-Line Fields for Metal-...

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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 ... the elements of the nodal F-vector depend on the heat generation and loss quanti- ties q*, q and h, and the elements of [H] e depend mainly on the conduction and convec- tion...

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