A pre-drilled hole of 010 mm in a block of 40 mm thick is required to be enlarged to O 16mm by core drilling process as shown in the figure below. The recommended cutting speed and the feed rate are 25 m/min. and 0.2 mm/rev respectively. The specific energy of block material is 4.0 W-s/mm³.Calculate the following a) Material removal rate (mm3/s) b) Power required for machining (W). c) Time required for machining. (Sec.) d) Total material removed (mm³) e) If the HSS core drill bit used obey the Taylor's tool life equation VT0.14 = 35 (m/min), how many holes the bit can enlarge before it is replaced? f) Is the above drilling operation can be done on an available drill press of 500 watts power with 80% efficiency? Check and show with calculation.

A pre-drilled hole of 010 mm in a block of 40 mm thick is required to be enlarged to O 16mm by core drilling process as shown in the figure below. The recommended cutting speed and the feed rate are 25 m/min. and 0.2 mm/rev respectively. The specific energy of block material is 4.0 W-s/mm³.Calculate the following a) Material removal rate (mm3/s) b) Power required for machining (W). c) Time required for machining. (Sec.) d) Total material removed (mm³) e) If the HSS core drill bit used obey the Taylor's tool life equation VT0.14 = 35 (m/min), how many holes the bit can enlarge before it is replaced? f) Is the above drilling operation can be done on an available drill press of 500 watts power with 80% efficiency? Check and show with calculation.

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

Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

solve fro d to f

A pre-drilled hole of 010 mm in a block of 40 mm thick is required to be enlarged to O 16mm by core drilling
process as shown in the figure below. The recommended cutting speed and the feed rate are 25 m/min. and
0.2 mm/rev respectively. The specific energy of block material is 4.0 W-s/mm³.Calculate the following
a) Material removal rate (mm³/s)
b) Power required for machining (W).
c) Time required for machining. (Sec.)
d) Total material removed (mm3)
e) If the HSS core drill bit used obey the Taylor's tool life equation VT0.14 = 35 (m/min), how many holes
the bit can enlarge before it is replaced?
f) Is the above drilling operation can be done on an available drill press of 500 watts power with 80%
efficiency? Check and show with calculation.
o16 mm
40 mm
H Fø10 mm
Core drilling

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