الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
TlUs work was intended to investigate the dissolution
ot the sidea of holes produoed by electrolytio sinking
prooess •
An experimental a.nd theoretical study has been Oar .• ried out to investigate the problem •
In the theoretioal study , the effects of tool feed rate , penetration depth and electrolyte inlet temper. ature on the amount of the side ourrent used •. the size of the side gap and consequently the side stock removal rate were considered •
~he experimental part was carried out using const¬ant feed oontrol system , to produce holes at different tool feed rates • provided constant gap voltage and saturated NaCL solution •
The experiments were devided into two main groups, namely r frontal machining group and full (hole) machi¬ning group.
The amount of current used for the side machining
was evaluated by substraction of the ~ount of current used for frontal machining from that used for the corre¬sponding full machining • provided the same other working
l
conditions for both eA~eriments •
The side gap was also measured at 8 mm from the
bottom of the produced hole whose depth ~ 10 nIDI •
Finally , the results showed that :
Either an increased tool feed rate or decreased
electrolyte flow rate would lead to ~lectrolyte temp¬erature rise through out the gap , which could be ser¬ious enough to ma::.e the electrolyte boil and terminate the process due to consequent sparking •
This trend suggested the deten:.ul1ation of safe wor¬king range of both tool feed !~te and electrolyte flow rate •
Those rates vre~’e found , experimentally , not exce¬ed 4 mm/ min and a minimwn of 6 lit/min , respectively.
The increase of electrolyte flow rate decreased the amount of the side current , while it increased the side gap. Moreover, the increase of tool fecd rate increased the side current and decreased the sizQ. of
the side gap •
The use of side tool insulation reduced both the
side current and the size of the side gap , therefore
straight walled holes could be produced