Low environmental impact machining processes of composite materials applied to the aerospace sector

Abstract

In the last decades, thecnologically innovative processes performed in advanced materials such as Carbon Fibre (CF) and Metal Matrix Composites (MMC) have continuously increased because of these materials find increasingle applications in the most of the industrial sector, particulary in aeronautical industry. This is caused by their excellent relationship weight/machanical properties. Although there is high trend to apply and develop non-conventional technologies and methods for machinig CF and MMC, other common machining processes are commonly applied for working these materials. Thus, in aeronautical industry, mechanical drilling processes are usually applied for preparing the manufactured elements to be assembled. However, drilling of CF based materialscan carry on troubes related to a loss of Surface finishing quality and/or quick and high toolo wear. This work reports on the results about an evaluation process of the Surface quality of drilled CF samples as a funcition of the cutting conditions and the tool materials.