Ultrasonic MQL System for Generating Size-controlled Droplets
Abstract
We present an ultrasonic MQL system for generating size-controlled droplets, engaging the requirement of variations in MQL droplet size depending on the used machining process and material. The proposed system architecture features four series chambers with a different vibrating mesh actuator; it demonstrates that a wide range of material- and machining process-specific lubrication requirements can be achieved by varying the mist atomization rate and droplet diameter. The vibrating-mesh outlet pore sizes were differentiated between 2 to 20 μm and driven by a 100 V peak-to-peak bipolar sinusoidal voltage. The oil with a kinematic viscosity of 8.9 cSt contacted the atomizing surface using an FLDC-configuration. Four-size mists were generated with mean volumetric droplet diameters of 19.1, 21.7, 39.0 and 48.3 μm; their atomization rates vary between 1.3 to 39.4 ml/h. The droplet size control must provide more flexibility for emerging ultrasonic MQL systems with improved lubrication and optimized machine-working performance.
Keywords:
Biodegradable vegetable oils, Minimum quantity lubrication, Size-controlled droplet, Piezoelectric actuation, Ultrasonic atomization, Vibrating-meshAcknowledgments
This paper was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korean Government (MOTIE) (P0002092, The Competency Development Program for Industry Specialist).
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Student in the Department of MSDE, Seoul National University of Science & Technology. His research interest is Manufacturing Systems and Design Engineering.
E-mail: lefebure.axel@gmail.com
Student in the Department of MSDE, Seoul National University of Science & Technology. Her research interest is Manufacturing Systems and Design Engineering.
E-mail: kse1120012@gmail.com
Student in the Department of MSDE, Seoul National University of Science & Technology. Her research interest is Manufacturing Systems and Design Engineering.
E-mail: buldog97@naver.com
Student in the Department of MSDE, Seoul National University of Science & Technology. Her research interest is Manufacturing Systems and Design Engineering.
E-mail: hajin7048@gmail.com
Student in the Department of MSDE, Seoul National University of Science & Technology. Her research interest is Manufacturing Systems and Design Engineering.
E-mail: jmpoisonn@naver.com
Student in the Department of MSDE, Seoul National University of Science & Technology. His research interest is Manufacturing Systems and Design Engineering.
E-mail: wkdtjgml7410@naver.com
Student in the Department of MSDE, Seoul National University of Science & Technology. His research interest is Manufacturing Systems and Design Engineering.
E-mail: jls3807@naver.com
Staff at HansungGT. Her research interest is Machine tool and computer-aided engineering.
E-mail: jhshin@hansungs.co.kr
Deputy general manager at HansungGT. His research interest is Machine tool and computer-aided engineering.
E-mail: cslee@hansungs.co.kr
General manager at HansungGT. His research interest is Machine tool.
E-mail: dk5533@hansungs.co.kr
Deputy general manager at HansungGT. His research interest is Machine tool.
E-mail: plan@hansungs.co.kr
Director at HansungGT. His research interest is Machine tool.
E-mail: hur0513@hansungs.co.kr
CEO of HansungGT. His research interest is Machine tool.
E-mail: hjkn6848@hansungs.co.kr
Professor in the Department of MSDE, Seoul National University of Science & Technology. His research interest is the design and implementation of multi-disciplinary electronic systems.
E-mail: dongha@seoultech.ac.kr