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디젤 엔진용 분절 피스톤의 예비성형체 단조 공정 연구

A Study on Forging Process about Preform of Articulated Piston for Diesel Engine

  • 발행 : 2004.11.01

초록

Today the specific outputs of modern supercharger DI diesel engine for passenger cars reach values exceeding 50kw/1. By development of the articulated piston, specific output of up to 70kw/1 are sought. In doing so, peak cylinder pressure increases from the current 14-16MPa to 18-20MPa. The Articulated piston was composed Al cast skirt part and steel forged crown part. We have the target fer the design of forging process and die of the steel forged crown part. The design parameters of the forging process of the piston were obtained by the forging industry experiences and our experimental data and analysis result of finite element simulation. Especially, the design parameter of preform in blocker die was decided by finite element simulation using numerical package DEFROM3D. And also we can verify the design parameter by conducting visio-plasticity test using plasticine material. When we compared the results of analysis and experiment, a metal flow and load curve showed good agreement. Through this research, we could design optimal preform shape of articulated piston for this supercharged DI diesel engine.

키워드

참고문헌

  1. Deform 3D Version 4.0 User's Manual
  2. 한국소성가공학회지 v.7 no.3 축대칭 열간 강단조의 피니셔 설계 시스템 개발 김대영;박종진
  3. Ind.-Anz. v.92 Design of Forging Flash Gap K. Vieregge
  4. Kusn.-Stamp. Proizvod. v.10 no.5 Calculation of the Flash Produced in Hammer forging of Disk-shape Parts G. P. Teterin;I. J. Tarnovskij
  5. Wissz Technische Universitat v.17 On Theoretical stress Determination in Closed-Forging with Flash W. Voelkner
  6. Manufacturing Processes for Engineering Materials K. Serope
  7. 대한기계학회논문집 v.17 no.12 단조하중 감소를 위한 열간 형단조공정 해석 김헌영;김중재;김낙수
  8. Trans. of the ISS Physical Modeling of Hot-Deformation Processes-Using Plasticine R. L. Bodnar;D. C. Ronemus;B. L. Bramfitt;D. C. Shah

피인용 문헌

  1. Hot Forging of an Engine Piston using Control Cooling vol.24, pp.6, 2015, https://doi.org/10.5228/KSTP.24.6.411