Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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- (USCS units) A turning operation is performed using a rake angle of 15°. Cutting speed = 200 ft/min, feed= 0.012 in/rev, and depth of cut = 0.100 in. The chip thickness ratio measured after the cut = 0.48. Determine (a) chip thickness after the cut, (b) shear angle, (c) friction angle, (d) coefficient of friction, and (e) shear strain
- (USCS units) The turning operation in the previous problem involves a work material whose shear strength = 52,000 lb/in2. Based on your answers to the previous problem, compute (a) shear force, (b) cutting force, (c) thrust force, and (d) friction force.
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- Using slot milling with a cutting tool surface width of 36mm was performed from the top surface to cut a workpiece of 85 x 42 x 8 cm into two equal parts. The milling cutter is 180 mm in diameter and has eight teeth. Cutting speed = 60 m/min, chip load = 0.35 mm/ tooth, and depth of cut = 2 mm, given that the setup and machine settings provide an approach distance of 7mm before actual cutting begins and an overtravel distance of 20 mm after actual cutting has finished, and the return time is a 4-second for idle pass stroke. Determine:- 1. What is the total machining time required for the entire workpiece? 2. The maximum metal removal rate during cutting.arrow_forward(b) A 400 mm long, 19.5 mm diameter of 304 stainless steel rod (assume specific energy of steel is 4 W.s/mm³) is being reduced in diameter to 17 mm by turning on a lathe machine. The spindle rotates at N = 700 rpm, and the tool is traveling at an axial speed of 300 mm/min. Calculate: (i) (ii) (iii) (iv) (v) cutting speed material removal rate cutting time power dissipated cutting forcearrow_forwardi need the answer quicklyarrow_forward
- In turning of stales steel alloy, 1100 mm length and 400 mm diameter, the Feed was 0.35 mm/rev, and depth of cut = 2.5 mm. The tool used in this cutting is cemented carbide tool where Taylor tool life parameters are n = 0.24 and C = 450 (tool life (min) and cutting speed (m/min). Compute the cutting speed that will allow the tool life to be 10% longer than the machining time for this part.arrow_forwardProblem 2. (Determining Cutting Speeds in Machining Economics) A turning operation is performed with HSS tooling on mild steel, with Taylor tool life parameters n = 0.12, C = 60 m/min. Work part length = 450 mm and diameter = 80 mm. Feed = 0.20 mm/rev. Handling time per piece = 4.0 min, and tool change time = 1.5 min. Cost of machine and operator = $27/hr, and tooling cost = $2 per cutting edge. Find the a. cutting speed for maximum production rate and b. cutting speed for minimum cost Problem 3. (Production Rate and Cost in Machining Economics) For the two cutting speeds computed in problem 2, determine: the hourly production rate and a. b. the cost per piece.arrow_forward
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