Modares Mechanical Engineering

Modares Mechanical Engineering

Study on the employment of the intermediate part on the accuracy of the electrochemical discharge drilling

Document Type : Original Research

Authors
Sadegh Elhami 1
Pargol rezvani 2
Mohammad Reza Razfar 2
1 Ferdowsi University of Mashhad, Mashhade Moghaddas, Iran
2 Amirkabir University of Technology
10.22034/mme.23.4.249
Abstract
Today, the application of materials such as glass has been widely developed in the

manufacture of micronutrients, electronics and medical equipment because of its high

hardness, chemical resistance and high abrasion. But due to high hardness and low

toughness, mechanical machining can not be applied. The Electrochemical discharge

method is a new machining method that is capable of machining hard and non-conductive

electrical materials such as glass. In the process of electrochemical discharge drilling, the

dimensional accuracy of the hole and especially its inlet area is important. but almost, the

inlet of the hole has a high slope, which leads to excessive hole overcut and tapering of the

hole side wall. In this study, to remove the high slope entrance area, a thin intermediate part

was used which will be separated from the main workpiece after the drilling process. The

results showed that mentioned method reduced the entrance overcut of the hole by 50 to

76% depending on the diameter of the tool. Also, the hardness measuring of points on the

hole inlet showed that using the intermediate part led to the smaller heat-affected zone

(HAZ) around the hole entrance.
Keywords
Electrochemical Discharge Machining
Intermediate Part
Overcut
Tapering
Hardness

Subjects

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Modares Mechanical Engineering
Volume 23, Issue 4
March 2023
Pages 249-256