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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
370 Fundamentals of Machining Processes
Dimensional tolerances for ECM are ±0.13 mm for the frontal gap and
±0.25 mm for the side gap. Overcut of 0.05 mm, taper of 1 mm/mm, and a
corner radii of 5 mm are possible and depend on the conguration of the
cathodic tool used.
Surface nish: Surface nish of the machined parts by ECM is usually
0.3–1.9 μm R
a
for the frontal gap area and as rough as 5 μm R
a
or more for
the side gap area. Microscopic surface defects, such as intergranular attack
(IGA), are caused by selective ECM attack on certain constituents of the alloy
at low current. Figure 11.11 shows the effect of gap voltage and feed rate on
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Publisher Resources

ISBN: 9781466577022