Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Development of Spinning Process for Manufacturing Liquid Rocket Engine Thrust Chamber

액체로켓 엔진 연소기 내피 스피닝 제작 공정 개발

  • Lee, Keumoh (Combustion Chamber Team, Korea Aerospace Research Institute) ;
  • Ryu, Chulsung (Combustion Chamber Team, Korea Aerospace Research Institute) ;
  • Heo, Seongchan (Combustion Chamber Team, Korea Aerospace Research Institute) ;
  • Choi, Hwanseok (Combustion Chamber Team, Korea Aerospace Research Institute) ;
  • Choi, Younho (Research & Development 1 Team, Doowon Heavy Industry)
  • Received : 2014.06.05
  • Accepted : 2014.11.19
  • Published : 2014.12.01
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Abstract

Spinning process to inner wall has been applied for reducing the weight of regenerative cooling chamber of liquid propellent rocket engine. The fractures of the blanks of cylinder part and nozzle throat part have been observed during spinning processes. In order to overcome the problem, the mandrel and the blank shape have been modified, and the inner wall was successfully manufactured through the modifications. The manufactured spinning prototype of nozzle throat part was successfully bulged without cracking and necking, and it was confirmed to secure sufficient formability necessary for fabricating thrust chamber.

액체로켓 엔진 재생냉각챔버의 무게 감량을 위하여 내피에 스피닝 공정을 적용하였다. 스피닝 도중 실린더부와 노즐목부의 블랭크에 파손이 발생하였다. 이 문제를 극복하기 위해 맨드럴 및 블랭크 형상을 수정하였으며 이러한 수정을 통해 스피닝을 사용하여 내피를 제작할 수 있었다. 제작된 노즐목부 스피닝 시제품은 균열이나 네킹없이 성공적으로 벌징이 되어 연소기 제작에 적용할 수 있는 충분한 성형성을 확보한 것을 확인하였다.

Keywords

References

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  1. Developing Trends of Spinning Process for Manufacturing Thrust Chamber of Launch Vehicle vol.19, pp.6, 2015, https://doi.org/10.6108/KSPE.2015.19.6.064