Cutting temperature and resulting influence on machining performance in rotary ultrasonic elliptical machining of thick CFRP. (December 2017)

• Record Type: Journal Article
• Authors: Geng, Daxi; Lu, Zhenghui; Yao, Guang; Liu, Jiajia; Li, Zhe; Zhang, Deyuan
• Is Part Of: International journal of machine tools & manufacture. Volume 123(2017)
• Page Start: 160
• Page End: 170
• Publication Date: 2017-12
• Subjects: CFRP -- Rotary ultrasonic elliptical machining -- Drilling -- Temperature -- Chip adhesion; Machine-tools -- Periodicals; Manufacturing processes -- Periodicals; Machines-outils -- Périodiques; Fabrication -- Périodiques; Electronic journals; 621.902
• DOI: 10.1016/j.ijmachtools.2017.08.008
• Languages: English
• ISSNs: 0890-6955

Abstract

Abstract: As a novel non-conventional machining process, rotary ultrasonic elliptical machining (RUEM) has been successfully used for drilling thick carbon fiber-reinforced plastics (CFRPs) recently. In order to reduce the thermal damage, the measurement of cutting temperature is important when RUEM of CFRP. In this research, the cutting temperatures in both RUEM and grinding drilling (GD) were measured by an infrared camera under dry condition. Temperature trends as functions of feed rate and cutting speed were obtained and the results showed that compared to GD, RUEM can effectively reduce the maximum temperature by 18.8% and 13.1% at the feed rate of 75 and 150 μm/rev respectively. Both mechanisms of temperature reduction and chip adhesion prevention in RUEM were analyzed. In addition, SEM observation of the machined surface revealed that better microstructure was obtained in RUEM compared to GD under the same cutting condition. Highlights: The intermittent cutting action of cutting edges in rotary ultrasonic elliptical machining (RUEM) was first revealed. Lower cutting temperature was achieved in RUEM compared to grinding drilling (GD). Both mechanisms of temperature reduction and chip adhesion prevention in RUEM were analyzed. Comparing to GD, RUEM can lead to better microstructures of the machined hole surfaces.