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 nonconventional 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.
Highlights
Nowadays, non-conventional machining methods are being used more than before in which the machining of new materials with special qualities not to be properly responded by conventional methods
It is seen that ultrasonic vibration could control the process where the thrust force was in a same way during the time
The thrust force increases during engagement time and it decreases during the disengagement time in ultrasonic drilling (UD) where the repetition of this work causes the average value of thrust force to be reduced in UD compared to conventional drilling (CD)
Summary
Non-conventional machining methods are being used more than before in which the machining of new materials with special qualities not to be properly responded by conventional methods. Thrust force, burr size, and surface quality of drilled holes were studied when ultrasonic drilling of a Ti-6Al-4V/Al2024-T351 laminated material was implemented. Ultrasonic drilling of a carbon fiber– reinforced plastics showed that better results about the delamination factor could be obtained by using ultrasonic vibration. The use of minimum quantity lubrication in machining of an AM Ti–6Al–4V material showed that it caused the surface quality to be improved compared to the dry cutting conditions [19]. These works have been carried out in conventional drilling (CD). Cutting force, chip breakage, surface roughness, and hole quality factors such as delamination, circularity, and cylindricality are evaluated
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