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 28:3:2000 2:38 pm Page 73 2.4.3 Wear in metal cutting Finally, ... chip flow and tool wear. Wear 13 9, 2 35 250 . Childs, T. H. C., Richings, D and Wilcox, A. B. (19 72) Metal cutting: mechanics, surface physics and meta...

Ngày tải lên: 21/07/2014, 17:20

... 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 28:3:2000 3 :12 ... r n d θθ 2 θ 4 A θ t 1e, θ 3–4 ⎛ ⎜ ⎝ ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ ⎞ ⎟ ⎠ ⎛ ⎜ ⎝ ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ ⎞ ⎟ ⎠ ⎛ ⎜ ⎝ ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ ⎞ ⎟ ⎠ Childs Part 2 28:3:2000 3 :13 pm Page 19 2 Non-orthogonal (three-dimensio...

Ngày tải lên: 21/07/2014, 17:20

... 47 (1) , 41 44. Williams, J. E, 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 Page 15 8 Over ... (Reichenbach, 19 58 ), on the tool flank Temperatures in machining 15 3 Fig. 5. 20 Radiation from a black body Childs Part 2 28:3:2000 3 :11 pm Page 15 3 (Chao et al.,...

Ngày tải lên: 21/07/2014, 17:20

... 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 B 111 2 TiC-Al 2 O 3 ceramic Inconel 718 VB max B 112 - P10, V = 200m/min, d = 0.5mm, ... measured, Temperatures in machining 15 1 Fig. 5 .17 A detail of the hot junction and the associated measurement circuit Fig. 5 .18 Calibration test results for P1...

Ngày tải lên: 21/07/2014, 17:20

... turning a 0. 45% 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 2 5 10 20 2 5 10 20 50 10 0 Oxygen ... (min) 15 0 m min -1 15 0 m min -1 236 m min -1 Turning Milling 236 m min -1 Crater depth ( µm) Depth of cut :1. 0mm Feed rate: 0.2 mm rev -1 Fla...

Ngày tải lên: 21/07/2014, 17:20

... 2.0 3 .1 960–990 – PCD 10 0 55 0 2.0** 3.8–4.2 620–840 14 0 54 0 PcBN 10 0* 1. 9–2 .1 4.7–4.9 680– 710 15 0–340 K-carbide 75 12 0 3.0–3.4 4 .5 6.0 55 0– 650 390–9 25 P-carbide 25 55 4.0–4 .1 5. 8–6.8 490 56 0 390–840 Cermet ... [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 ≈ 250 19 – 21 25 26 Al 2 O 3 8.4–9.0 ≈ 400 20–28 6–7 .5 WC-Co* 4 .5...

Ngày tải lên: 21/07/2014, 17:20

... [MJ/m 3 ] ≈ 3 .5 ≈ 3 .5 ≈ 2 .5 ≈ 4.0 ≈ 2.2 k/ ρ C 11 0–220 85 14 0 50 16 0 12 0–200 220–320 ∆T 1 [°C] a 230–470 18 0–300 11 0–340 250 –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 ... 6 15 K tool b [W/m K] 20 50 80 12 0 10 0 50 0 80 12 0 50 12 0 K* 0 .5 2 0.2 1 0.3 5 4–8 3–20 a ∆T 1 for γ ≈ 2 .5 and β = 0. 85; b tool grades appropr...

Ngày tải lên: 21/07/2014, 17:20

... 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 = 35 and n = (a) 1/ 2, (b) 1/ 3 and (c) 1/ 6 Childs ... in air and CCl 4 atmos- pheres at cutting speeds from 1 to 10 0 m/min, at feeds between 0 .1 and 0. 25 mm and with cutting tools of rake angle 6˚ to 40˚. At the high...

Ngày tải lên: 21/07/2014, 17:20

... 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 ... 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...

Ngày tải lên: 21/07/2014, 17:20

... 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 ... Page v 5. 4 Acoustic emission 15 5 References 15 7 6 Advances in mechanics 15 9 6 .1 Introduction 15 9 6.2 Slip-line field modelling 15 9 6.3 Introducing variable...

Ngày tải lên: 21/07/2014, 17:20