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العنوان
An investigation of machined surface characterisics by ECG machine /
المؤلف
Okasha, Mostafa Mohamed Mahmoud.
هيئة الاعداد
باحث / مصطفى محمد محمود عكاشة
مشرف / فريده سيد احمد
مناقش / محمد عبد المحسن سيد
مناقش / عبد القادر عبد الكريم ابراهيم
الموضوع
Conventional grinding process. Theoritical background.
تاريخ النشر
2002.
عدد الصفحات
115 p. ;
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الميكانيكية
تاريخ الإجازة
1/1/2002
مكان الإجازة
جامعة بنها - كلية الهندسة بشبرا - Department of mechanics
الفهرس
Only 14 pages are availabe for public view

from 131

from 131

Abstract

Electromechanical grinding ECG is an important non-traditional or advanced manufacturing process that provides a better alternative or sometimes the only alternative in machining components of exotic materials commonly used in aerospace, automobile, and medical devices industries.
The present work investigates the effects of applied voltage, feed rate and depth of cut on overcut, surface roughness and metal removal rate in electromechanical grinding of high-sped steel. The objective of this on-going investigation is to develop a better understanding of ECG performance. Some important experimental results are shown, as follows;
1-Electrochemical grinding under purely electrolytic conditions:
a)-Current efficiency increases with increasing feed rate.
b)-Overcut decreases with decreasing applied voltage is the most dominant parameter.
c)-Surface roughness decreases with decreasing applied voltage and increasing feed rate.
d)-Metal removal rate increases with increasing applied voltage and feed rate.
e)-When using down-cutting mode, there is possibility of reducing the amount of overcut. On the other hand a reduction of the metal removal rate and worse surface roughness are obtained with this technique.
2-Electrochemical grinding with mechanical contribution:
a) The quality of surface characteristic improves with increasing depth of cut.
b)The use of up-cutting mode is essential to avoid the sparking accomplished by down-cutting mode.