V.K Jain's Advanced Machining Processes PDF

By V.K Jain

Non traditional production methods, Non conventional production strategies

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Tooling, Vol. 48(9), pp. 33-35. A. (1988), Advanced Methods o f Machining, Chapman & Hall, London. E. (1957), Special Theory of Ultrasonic Machining, J. Appl. , Vol. 28(2), p. 149. A. D. (1956-57), Ultrasonic Machining, Philips Technical Review, Vol. 18, pp. 325, 368. C. S. (1980), M odem Machining Processes, Tata McGraw Hill, New Delhi. C. (1956), Ultrasonic Grinding, Microtecnic, Vol. 10, p. 257. Soundararajan V. and Radhakrishnan V. (1986), An Experimental Investiga­ tion on Basic Mechanism Involved in Ultrasonic Machining, Int J.

In USM, the throw- 28 ing force is contributed by the tool oscillating at ultrasonic frequency. The par­ ticles are of different sizes and they are thrown many times per second. In some cases, they are hammered also through the slurry. Fig. 2 shows a schematic diagram of USM system. Fig. 1 The word ultrasonic describes a vibratory wave having frequency larger than upper frequency limit of human ear (usually greater than 16 kc/s). Waves are usually classified as shear waves and longitudinal waves.

2 ) M a+C ’ where, Ma is the abrasive mass flow rate, and Ma+C is abrasive and carrier gas 15 (a) (d) Cb) (« ) \ Fig. 4 mm (f) Photograph of the actual machined cavity profile at different stand-off-distance (a) 2 mm, (b) 6 mm, (c) 10 mm, (d) 14 mm, (e) 16 mm, (f) 20 mm. 15 kN /nr (gauge), and cutting time = 60 s [ Verma and Lai, 1984]. 16 combined mass flow rate. Verma and Lai [1984, 1985] have studied its effect on optimum volumetric material removal rate. 3) where, C and n are constants, a is minimum flow stress of work material, v is velocity of impacting particles, and 0 is impingement angle.

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Advanced Machining Processes by V.K Jain


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