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Fundamentals of Machining Processes, 2nd Edition
book

Fundamentals of Machining Processes, 2nd Edition

by Hassan Abdel-Gawad El-Hofy
August 2013
Beginner to intermediate content levelBeginner to intermediate
562 pages
16h 1m
English
CRC Press
Content preview from Fundamentals of Machining Processes, 2nd Edition
365Machining by Electrochemical Erosion
11.5 Solved Example
It is required to drill a hole of 10 mm diameter and 20 mm depth in a hard
alloy using the following conditions:
Tool feed rate 2 mm/min Faraday’s constant 96,500 A s
Gap voltage 20 V Electrolyte conductivity 0.032
−1
mm
−1
Voltage drop 0 V Density of workpiece 0.0084 g/mm
3
Atomic weight 42.44 Oversize (diametral) 2 mm
Current efciency 100% Valence 2
Calculate the following:
a. Machining time
b. Tool diameter
c. Machining current
d. Machining gap
Solution
a. The machining time for the hole depth l and feed rate a
t
l
a
m
== =
20
2
10 min
b. The tool diameter (d
t
) is calculated from the wor
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Publisher Resources

ISBN: 9781466577022