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question 1 Consider an orthogonal machining process The width of the tool is 10mm while the width of the job is 5mm. The depth of cut is 1mm The shear stress produced during machining is 500 MPa. Agaume the cutting force in cutting motion direction is 1.5 times the force in tangential direction. Shear angle obtained in 45 C while the rake angle of the tool is 30°C. (9 Marks) Estimate a) Shear area in mm^2 b) Thrust forces e) Cutting force Q2 A 4 inch diameter rod is cut by turning at a speed around 60 m/min. What is the approximate RPM of the spindle of the lathe must be? (2 Marks)

Fo FA Q3): The cutting force and thrust force in an orthogonal cutting operation are 620 N and 246 N, respectively. The rake angle = 8°, the width of the cut = 5 mm, the chip thickness before the cut = 0.11, the chip thickness=0.22, and the cutting velocity 2m/s. Determine (a) the Power consumed in shear (b) the power consumed in friction and (c) the work-piece material shear strength (shear stress). (10 Marks) Fo=620N F 5mm to:o 11 to:o22 ARA

Q1) illustrate the effect of excel in metal removal practices on national industry development (ABET question SO 4,5 Marks) and national economy? fwe effect the metod removal preetic the CECA economy will be more effictive condove will not need to deal with other countries and we will be abble to recycle and devolp our markting and that will very good for our industry de velpoment tek sudi Arbia Now theghale. m their name glodble because of they start to removal Practices. UT"c Q2: The cutting speed and tool life relationship for a tool is given by VTS = C, where Vis the cutting speed in meter per minute and Tis tool life in minutes. During machining 18 mm bar on a lathe at a cutting speed of 110 meter per minute the life of the tool is found to be 60 minutes. If n = 0.2 calculate the speed at which the spindle should be run to give a tool life of five hours. (5 Marks) a T-ST L

time 071 A plate 600 mm x 600 mm is to be machined on a shaper. The cutting speed of the tool is 5 m/min, the rerum to cytting time tatio is 1:3, the feat of the tool mom and clearance at each is comm ahead of the work place and mm from behind find the time required for taking a complete cat on the plato (7 Marks) S* 1056 630 600 2010 ca 690 cutting time 630 660) 15 (1000) Distante 371 500 7.56 decendi/pass R Return time 2:52 total time 10.01 beconds so BR R$2.52 Coa 12 300 r required complete eut 300 x 10.08 -3024 seconds 50.4 mins. More Remix