High Aspect Ratio Machining of Carbon Fiber Reinforced Plastics by Electrical Discharge Machining Process

Author:

Makudapathy Cibi1,Sundaram Murali1

Affiliation:

1. Department of Mechanical and Materials Engineering, University of Cincinnati, 2600 Clifton Ave., Cincinnati, OH 45221

Abstract

Abstract Micromachining of carbon fiber reinforced plastics (CFRPs) is essential for numerous applications in several industries such as aerospace, automotive, defense, shipping, sporting goods, and biomedical industries. The major challenge in machining CFRP by electrical discharge machining (EDM) is due to the nonconductivity of epoxy material which is used as a binder for manufacturing these CRFPs. This study attempts a novel, yet simple, approach to ensure the conductivity of the work piece through the entire machining process. Experiments were carried out as a part of this work to assess the feasibility of machining high aspect ratio microholes in CFRP by micro-EDM. The effect of process parameters such as voltage and feed-rate on the hole quality was studied. Using optimal process conditions, microhole of 2500 μm deep with an aspect ratio of over 11 was achieved.

Funder

National Science Foundation

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Process Chemistry and Technology,Mechanics of Materials

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