Evaluating the Hole Quality Produced by Vibratory Drilling: Additive Manufactured PLA+

Abstract

Improving the surface quality of additive manufactured parts like poly lactic acid (+) is an important study that is currently being carried out by researchers. To reach the high quality, different conventional and non-conventional methods are applied. In this study, the capability of ultrasonic vibration in drilling of an additive manufactured poly lactic acid (+)was examined. The process was implemented in two methods: conventional and vibratory drilling. Then, thrust force and chip type were analyzed and the effect of them on surface roughness, delamination, circularity, and cylindricality have been investigated. As a result, it was indicated that lower thrust force and broken chips, which were generated in ultrasonic drilling, caused the surface quality parameters to be improved compared to the conventional method.

Correlation between residual stress and geometric tolerances in ultrasonic assisted turning

“…Amini et al 17 studied showed that in the drilling process of al 2024, ultrasonic-assisted drilling feed force was decreased by about 70%. Baraheni et al 18 indicated a better precise hole quality. The outcomes of an investigation completed by Teimouri et al 19 showed that ultrasonic vibration in the milling process can reduce the shear force in 7075 aluminum milling by 75%.…”