BONUS: If the volume of the 8cm x 6.5cm x 6cm Block of Aluminum was 312cm3 before machining, find how much material was removed when the fixture below was machined. +2 2.00 cm 6.00 cm 2.50 cm 6.50 cm 1.00 cm 2.50 cm 11.00 cm 8.00 cm 30 CP 9411 FL.4) (m² 1157 Area of triangle = 1/2*B*H Area of circle = лR² Circumference of a circle = 2πR 6.00 cm 6.50 cm 1.50 cm Radius 1.50 cm 1.00 cm

BONUS: If the volume of the 8cm x 6.5cm x 6cm Block of Aluminum was 312cm3 before machining, find how much material was removed when the fixture below was machined. +2 2.00 cm 6.00 cm 2.50 cm 6.50 cm 1.00 cm 2.50 cm 11.00 cm 8.00 cm 30 CP 9411 FL.4) (m² 1157 Area of triangle = 1/2BH Area of circle = лR² Circumference of a circle = 2πR 6.00 cm 6.50 cm 1.50 cm Radius 1.50 cm 1.00 cm

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter5: Turning

Section5.3: Machining Operations On The Lathe

Problem 1RQ: If a 0.050" depth of cut is taken on the diameter of a workpiece, by how much will the diameter be...

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2. A rectangular plate 4X8 in. is in full contact with the base of a fixture. The hole in the workpiece has been machined to 1.500 in. at the exact center of the plate. Figure 2 shows this plate. The plug diameter is 1.495. Calculate: a) the maximum height of the plug if the 4-in. side is lifted of the plug, and b) the maximum height of the plug if the 8-in. side is lifted off the plug. c) Compare the two plug designs. Pivot Side x Sde Y Pivot d) Calculate the maximum diameter of the plug for the 8-in. lift which will permit the use of a 0.250-in height plug. e) Compare the clearance in part (d) with part (b). f) If a chamfer height of 0.1 inch is added counter sunk in the hole, what will be the plug height for cases a and b. Figure 2
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F, = 50 N F2 = = 40 N -5 45° F1 = 20 N
29- In a turning operation on brass with hardness = 125 HB, the cutting speed = 200 m/min, teed = 0.25 mm/rev, and depth of cut =7.5 mm. How much power will the lathe draw in performing this operation if its mechanical efficiency 90%. Use the table given below to obtain the appropriate specific energy value. Specific Energy U or Unit Power Pu Brinell Unit Horsepower HP, hp/(in'/min) Material Hardness N-m/mm in-lb/in Carbon steel 150-200 1.6 240,000 0.6 201-250 2.2 320,000 0.8 251-300 2.8 400,000 1.0 Alloy steels 200-250 2.2 320,000 0.8 251-300 2.8 400,000 1.0 301-350 3.6 520,000 1.3 351-400 4.4 640,000 1.6 Cast irons 125-175 1.1 160,000 0.4 175-250 1.6 240,000 0.6 Stainless steel 150-250 2.8 400,000 1.0 Aluminum 50-100 0.7 100,000 0.25 Aluminum alloys 100-150 0.8 120,000 0.3 Brass 100-150 2.2 320,000 0.8 Bronze 100-150 2.2 320,000 0.8 Magnesium alloys 50-100 0.4 60,000 0.15 a) 21,007 b) 38.194 10.503 d) 16.667 3332
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8. Find the volume of a bronze bushing if it's inside diameter is 1 inch, outside diameter is 1.50 inches, and length is 2 inches. Page #
The figure shows the part drawing of turning exercise in lathe machine. a) List out the operation and cutting tool need to carry for completing the job. b) Use the necessary data from the figure to find out the taper angle for taper turning operation.