A mild steel block is being drilled with a drill of 10 mm diameters. Given Helix angle = 30° Feed = 0.2 mm/rev Ts = 450 N/mm2 Estimate the drilling torque and thrust using Lee and Shaffer's shear angle relation. Assume the coefficient of friction between the chip and the drill to be 0.75. %3!

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A mild steel block is being drilled with a drill of 10 mm diameters. Given
Helix angle = 30°
Feed = 0.2 mm/rev
%3D
Ts = 450 N/mm?
Estimate the drilling torque and thrust using Lee and Shaffer's shear angle relation. Assume
the coefficient of friction between the chip and the drill to be 0.75.
Transcribed Image Text:A mild steel block is being drilled with a drill of 10 mm diameters. Given Helix angle = 30° Feed = 0.2 mm/rev %3D Ts = 450 N/mm? Estimate the drilling torque and thrust using Lee and Shaffer's shear angle relation. Assume the coefficient of friction between the chip and the drill to be 0.75.
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