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Current Issue

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33 , No. 1

[Paper List]


[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 5, pp. 352-358
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Oct 2021
Received 10 May 2021 Revised 07 Jul 2021 Accepted 03 Aug 2021
DOI: https://doi.org/10.7735/ksmte.2021.30.5.352
Ultrasonic MQL System for Generating Size-controlled Droplets
Axel Lefebure^a ; Seeun Kim^a ; Yunseo Kang^a ; Hajin Park^a ; Jumi Lee^a ; Seohee Jang^a ; Inho Lee^a ; Juhye Shin^b ; Chang Soo Lee^b ; Deuk Kwi Lee^b ; Young Chang Park^b ; Jin Hur^b ; Hyung Jin Kwon^b ; Dongha Shim^a^{, *}
aDepartment of MSDE, Seoul National University of Science & Technology
bHansung GT


Correspondence to : ^*Tel.: +82-2-970-7287 E-mail address: dongha@seoultech.ac.kr (Dongha Shim).



Funding Information ▼ Korea Institute for Advancement of Technology Ministry of Trade, Industry and Energy P0002092

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-mesh

Acknowledgments

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).

References


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Axel Lefebure

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

Seeun Kim

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

Yunseo Kang

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

Hajin Park

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

Jumi Lee

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

Seohee Jang

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

Inho Lee

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

Juhye Shin

Staff at HansungGT. Her research interest is Machine tool and computer-aided engineering.

E-mail: jhshin@hansungs.co.kr

Chang Soo Lee

Deputy general manager at HansungGT. His research interest is Machine tool and computer-aided engineering.

E-mail: cslee@hansungs.co.kr

Deuk Kwi Lee

General manager at HansungGT. His research interest is Machine tool.

E-mail: dk5533@hansungs.co.kr

Young Chang Park

Deputy general manager at HansungGT. His research interest is Machine tool.

E-mail: plan@hansungs.co.kr

Jin Hur

Director at HansungGT. His research interest is Machine tool.

E-mail: hur0513@hansungs.co.kr

Hyung Jin Kwon

CEO of HansungGT. His research interest is Machine tool.

E-mail: hjkn6848@hansungs.co.kr

Dongha Shim

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