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!

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.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Machining Processes and Machine Tools

Machining is represented as the process in which an excessive amount of substance is eliminated from the particular element in the form of pieces. In machining, cutting tools such as rotary tools, lathe, drill press, grinder, chop saw, welders, and many more are applied to get the desired shape. As compared to other manufacturing processes, machining is precise and versatile.

Question

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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