By Robert I. King (auth.), Robert I. King (eds.)
The usa now spends nearly $115 billion every year to accomplish its steel elimination initiatives utilizing traditional machining know-how. Of this overall quantity, approximately $14 billion is invested within the aerospace and linked industries. It turns into transparent that steel removing know-how is a vital candidate for rigorous research taking a look towards development of produc tivity in the production method. to help during this exercise, paintings has all started to set up a brand new clinical and technical base that may supply prin ciples upon which production judgements could be established. one of many steel removing components that has the possibility of nice monetary benefits is high-speed machining and similar expertise. this article is con cerned with discussions of the way within which high-speed machining platforms can resolve fast difficulties of profiling, pocketing, slotting, sculpturing, dealing with, turning, drilling, and thin-walled sectioning. advantages to many latest courses are supplied via assisting in fixing a present administration creation challenge, that of successfully removal huge volumes of steel via chip removing. The injection of recent high-rate steel removing options into traditional creation approaches, that have remained essentially unchanged for a cen tury, offers a powerful structures challenge, either technically and guy agerially.The right answer calls for a cosmopolitan, tough method wherein management-worker relationships are reassessed, age-old computing device deSigns reevaluated, and a brand new vista of product/process making plans and layout admitted.
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Extra resources for Handbook of High-Speed Machining Technology
3. The tool is perfectly sharp. Yv x o b1 WIDTH OF CUT - Vc CUTTING VELOCITY t2 CHIP THICKNESS V"F CHIP VELOCITY b2 WIDTH OF CHIP FEED (DEPTH OF CUT) Fig. 1 Basic dimensions of model. O! lc = RAKE ANGLE LENGTH OF CONTACT 30 General Theory 4. The chip is a continuous ribbon. 5. The cutting velocity vector Vc is normal to the cutting edge. 6. The workpiece material is a homogeneous, isotropic, incompressible solid. 7. The workpiece is at room temperature. 8. The cutting is performed in air with no liquid coolants.
And N. Nakayama, "Ultra-High-Speed Machining and Its Technique," Sci. , Vol. 13, 1961, pp. 779-782 and 911-916. 177. Yamamoto, A. and S. Nakamuril "Study on Chip Formation in Ultra-HighSpeed Cutting: Cutting of Photoelastic Materials at Speeds Over Elastic Distortion Wave Propagation Velocity," Bull. Japan Soc. , September 1971, Vol. 3, pp. 67-72 (in English). 178. , 'The Micro-Mechanism of Fracture, Fracturing of Metals," Trans. Am. Soc. Metals, 1948, pp. 3-31. 179. Zener, C. and J. H. Holloman, "Plastic Flow and Rupture of Metals," Trans.
2) it follows that Vp tl = - = rc. " Since the chip remains attached to the workpiece and increases in length only, any point A in its interior must have a velocity V S ' which is a vector sum of the velocities Vc and Vp in the reference frame (0, x, y) indicated in Fig. 1. 4) which is shown in Fig. 2. The angle 4> between the vectors Vc and Vs is called the "shear angle," and is determined from the expression tan A.. 5) Thus it is sufficient to measure the chip thickness t2 and using Eq. 3) determine the value of 4>.