Metal Machining Episode 14 docx

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Ngày tải lên: 13/08/2014, 05:21

... commonly used to solve these types of boundary value problems where the nature of the boundary condition changes along a given boundary —theso-called mixed boundary value problem. We begin by introducing ... T., 2001: Slip boundary condition on an idealized porous wall. Phys. Fluids, 13, 18841890. â 2008 by Taylor & Francis Group, LLC 386 Mixed Boundary Valu e Prob...

Ngày tải lên: 13/08/2014, 05:22

... na $31 , 536 $33 ,1 13 $34 ,768 $36 ,507 $38 ,33 2 Horsepower Losses na $ 130 ,086 $ 130 ,086 $ 130 ,086 $ 130 ,086 $ 130 ,086 Operation and Maintenance na $25,000 $31 ,250 $39 ,0 63 $48,828 $61, 035 Fouling ... $33 ,1 13 $ 130 ,086 $31 ,250 $15,000 $0 $242 ,32 7 na na $22,966 $34 ,768 $ 130 ,086 $39 ,0 63 $15,000 $0 $241,8 83 ~ $12,000 na na na...

Ngày tải lên: 13/08/2014, 09:20

... in the wake of bubbles in a classical fluid”, Proceedings of the 14 th international conference on low temperature Physics LT 14 (Helsinki) pp. 279-282, North Holland Publishing Company, Amsterdam, ... Innovation Engineering: The Power of Intangible Networks [DES 96] DESHAYES P., “The duality environment/teleology in modelling process of conception”, in CESA’96 Multiconference Compu...

Ngày tải lên: 13/08/2014, 09:20

... 500–700 ρ C [MJ/m 3 ] ≈ 3. 5 ≈ 3. 5 ≈ 2.5 ≈ 4.0 ≈ 2.2 k/ ρ C 110–220 85–140 50–160 120–200 220 32 0 ∆T 1 [°C] a 230 –470 180 30 0 110 34 0 250– 430 470–680 K work [W/m K] 25–45 100–400 100 30 0 15–20 6–15 K tool b [W/m ... E. (19 73) Friction characteristics on tool face in metal machining. J. JSPE 39 , 966–972. Taylor, F. W. (1907) On the art of cutting metals. Trans. ASME 28, 31 3...

Ngày tải lên: 13/08/2014, 09:20

... 2.0** 3.8 4. 2 620– 840 140 – 540 PcBN ≈100* 1.9–2.1 4. 7 4. 9 680–710 150– 340 K-carbide 75–120 3.0–3 .4 4.5–6.0 550–650 390–925 P-carbide 25–55 4. 0 4. 1 5.8–6.8 49 0–560 390– 840 Cermet 11–35 2 .4 2.7 6.7–7.8 ... 6.7–7.8 390 42 0 48 0– 740 Al 2 O 3 10–35 3.2–3.6 7.9–8.0 380–390 145 –330 Al 2 O 3 /TiC 10–22 3.8 4. 0 7.6–8.0 370–395 180–330 Al 2 O 3 /SiC(wh.) 10–35 ≈3 .4* 7.0–7.5 34...

Ngày tải lên: 13/08/2014, 09:20

... 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 - P10, V = 200m/min, d = 0.5mm, f = 0.1mm/rev Sintered ... chamfers for a length T between 0.5f and 0.75f for turning operations and 1.2f to 1.5f for milling; with a c from 15 to 30˚ depending on the severity of the machini...

Ngày tải lên: 13/08/2014, 09:20

... 1991), to give an insight into how machining may be changed by non-planar rake face and cutting edge modified tools. Figures 6. 6 and 6. 7 give examples. Figure 6. 6 is concerned with modifications ... equation (6. 9a) to the work-hardening behaviour of the material, expressed as s — = s 0 e — n (6. 10) and to the shear strain-rate on OA″, from equation (6. 6), in order to replace equat...

Ngày tải lên: 13/08/2014, 09:20

... al., 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 where ... single-point cutting tools. Trans. ASME 76 , 199–204. Dewhurst, P. (1 978 ) On the non-uniqueness of the machining process. Proc. Roy. Soc. Lond. A360, 5 87 610. Dewhurst, P. (1 979 )...

Ngày tải lên: 13/08/2014, 09:20

... conditions as Figure 7.14 Childs Part 2 28: 3:2000 3:15 pm Page 217 2 28 Applications of finite element analysis Fig. 8. 1 continued Childs Part 2 28: 3:2000 3:16 pm Page 2 28 generate the nucleus of a BUE. ... methods were being developed for metal machining, linear fracture mechanics methods were being developed for the machining of brittle ceramics (Ueda and Sugita, 1 983 ). The 1...

Ngày tải lên: 13/08/2014, 09:20

... (2.24d) V=100 m/min V=200 m/min m à n* m à n* Steel P 1.0 2.31 3. 89 1.0 2.48 3.22 Steel X 0 .99 1.25 3.05 0 .96 1.43 2.06 Steel Y 0 .97 0.76 5 .98 0 .99 1.04 3.04 Steel L 0.74 0.38 8.78 0.88 0.72 4.21 Childs ... Luttervelt, 199 3). Section 8.4.1 describes a two-dimensional (orthogonal) finite element simulation of chip breaking when machining with grooved rake face tools (Shinozuka et al....

Ngày tải lên: 13/08/2014, 09:20

... (1970) The metallurgy of machining, Part 2. Metallurgia 81, 51–59. Yamaguchi, K. and Kato, T. (1980) Friction reduction actions of inclusions in metal cutting. Trans ASME J. Eng. Ind. 103 , 221–228. Yamane, ... (1998) Modeling the physics of metal cutting in high speed machining. Int. J. Machining Sci. and Tech. 2, 343–353. Shaw, M. C., Usui, E. and Smith, P. A. (1961) Free machinin...

Ngày tải lên: 13/08/2014, 09:20

... temperature in machining 58–65 Thermal number 59–60, 62, 84, 356 Thermocouple circuits 147 –8 and cold junction compensation 149 and law of intermediate metals 147 Three-dimensional machining, see ... machines 14 15 Drilling process geometry of 40–2 expert system 294–5 times and costs 32 Dynamic stiffness 140 –1, 281–2 Dynamometer design 141 –4 dynamic response 140 –1 Economic opt...

Ngày tải lên: 13/08/2014, 09:20

... materials 81 3 .1 Work material characteristics 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 ... developed in Figure 1. 16. 12 Introduction Fig. 1. 12 Examples of turning and milling solid, brazed and insert tools Childs Part 1 28:3:2000 2:33 pm Page 12 1...

Ngày tải lên: 13/08/2014, 09:20