[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 28, No. 3, pp.148-155

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2019

Received 31 Jan 2019 Revised 11 Mar 2019 Accepted 10 Jun 2019

DOI: https://doi.org/10.7735/ksmte.2019.28.3.148

절삭시뮬레이션에서 마찰계수와 메시변화가 절삭력과 칩형상에 미치는 영향

구병문^a^{, b}

; 김태호^c^{, *} ; 전언찬^d

Effects of Friction Coefficient and Mesh Change on Cutting Force and Chip Shape in Cutting Simulation

Byeung Mun Ku^a^{, b}

; Tae Ho Kim^c^{, *} ; Eon Chan Jeon^d

aDepartment of Mechanical Engineering, Graduate School, Dong-A UNIV., 37, Nakdong-daero 550beon-gil, Saha-gu, Busan 49315, Korea
bVehicle & Launcher System R&D Division, Hanwha Defense, 799, Gongdan-ro, Seongsan-gu, Changwon, Gyeongnam-do, 51540, Korea
cT&SMachining, 71-2, Mieumsandan 5-ro 41beon-gil, Gangseo-gu, Busan 46744, Korea
dDepartment of Mechanical Engineering, Dong-A UNIV., 37, Nakdong-daero 550beon-gil, Saha-gu, Busan 49315, Korea

Correspondence to: ^*Tel.: +82-51-201-4075 Fax: +82-51-201-4041 E-mail address: kth0110@gmail.com (Tae Ho Kim).

Abstract

To predict the cutting force of a Ti-6Al-4V material fabricated using a 3D printer, we have confirmed the relationship between the change in cutting force and formation of shear chip as a function of the change of friction coefficient and mesh size in cutting simulation. We found that the cutting force initially increases linearly until it reaches a constant value as the friction coefficient is increased, and remains constant thereafter. We also confirmed that the cutting force increases linearly with increasing mesh size. Ti-6Al-4V used in a 3D printer produces a shear-type chip in the same manner as conventional materials. The generation of shear chips in cutting simulation is affected by both the friction coefficient as well as mesh size. However, the mesh size has a greater impact than the friction coefficient. In particular, the smaller the mesh size, the better is the shear chip representation.

Keywords:

S-K constitutive equation, Ti-6Al-4V, Chip formation, Mesh size, Friction coefficient, 3D printer

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