Effect of longitudinal−torsional vibration in ultrasonic-assisted drilling. Issue 6 (26th April 2017)

• Record Type: Journal Article
• Authors: Amini, Saeid; Soleimani, Meysam; Paktinat, Hossein; Lotfi, Mohammad
• Is Part Of: Materials and manufacturing processes. Volume 32:Issue 6(2017)
• Page Start: 616
• Page End: 622
• Publication Date: 2017-04-26
• Subjects: Ultrasonic -- drilling -- longitudinal−torsional -- Al 7075-T6 -- force -- torque -- vibration -- surface -- frequency; Manufacturing processes -- Periodicals; Materials -- Periodicals; Manufactured Materials; 670.5
• DOI: 10.1080/10426914.2016.1198027
• Languages: English
• ISSNs: 1042-6914

Abstract

ABSTRACT: In general, drilling of aeronautical materials is faced with some difficulties. To improve this process, a variety of methods have been presented by researchers. One of these methods is ultrasonic-assisted drilling (UAD). In this study, performance of longitudinal−torsional (L-T) vibration in UAD of Al 7075-T6 with HSS tool is investigated. Accordingly, a vibration tool with ability of producing L-T vibration was designed. After modal analysis and achievement of desired resonance frequency, it was fabricated and some experimental tests were conducted. A dynamometer with six degrees of freedom was utilized to measure torque and thrust force during the cutting process. As a result, it was revealed that this kind of vibration significantly reduces cutting forces compared with the conventional drilling (CD). Furthermore, this reduction was clarified by investigation of generated chips and tool rake angle. Moreover, effect of ultrasonic vibration on drill skidding and surface quality has been studied.