Abstract
In order for CFRP materials to be used in aircraft structures or machine elements, high quality holes must be created on them efficiently. However, it is difficult for conventional methods such as drilling and helical milling to meet the requirements, and hence a so-called tilt helical milling (THM) method has been proposed which is performed just by tilting the workpiece at a small angle in helical milling. In order for this method to be performed at low cost, holes with different diameters should be created with the same tool. In this case, the eccentricity of tool must be adjusted according to the diameters of the hole and tool, and subsequently it is important to elucidate how the tool eccentricity affects the hole quality. Consequently, in this work, the influence of the tool eccentricity on the quality of the hole created by THM was experimentally investigated. This paper reports the obtained results.
