DOI QR코드

DOI QR Code

S-K 구성방정식을 이용한 프린터용 3D Ti-6Al-4V 재료의 유동응력 결정 및 절삭력 예측

Determination of Flow Stress and Cutting Force Prediction of Ti-6Al-4V Material for 3D Printer using S-K Constitutive Equation

  • 투고 : 2018.06.26
  • 심사 : 2018.09.16
  • 발행 : 2018.12.31

초록

Study on the Ti-6Al-4V have been carried out using cutting simulation, and researches for cutting force and chip shape prediction have been actively conducted under various conditions. However, a 3D printer application method using Ti-6Al-4V metal powder material as a high-power method has been studied for the purpose of prototyping, mold modification and product modification while lowering material removal rate. However, in the case of products / parts made of 3D printers using powder materials, problems may occur in the contact surface during tolerance management and assembly due to the degradation of the surface quality. As a result, even if a 3D printer is applied, post-processing through cutting is essential for surface quality improvement and tolerance management. In the cutting simulation, the cutting force and the chip shape were predicted based on the Johnson-Cook composition equation, but the shape of the shear type chip was not predictable. To solve this problem, we added a damaging term or strain softening term to the Johnson-Cook constitutive equation to predict chip shape. In this thesis, we applied the constant value of the S-K equations to the cutting simulation to predict the cutting force and compare with the experimental data to verify the validity of the cutting simulation and analyzed the machining characterization by considering conditions.

키워드

참고문헌

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피인용 문헌

  1. Effects of Friction Coefficient and Mesh Change on Cutting Force and Chip Shape in Cutting Simulation vol.28, pp.3, 2019, https://doi.org/10.7735/ksmte.2019.28.3.148
  2. 항공용 티타늄 합금 가공 공정의 지속가능성 평가 vol.18, pp.12, 2018, https://doi.org/10.14775/ksmpe.2019.18.12.073