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손유선(Yusun Son),황규석(Guesec Hwang),탁성훈(Seonghun Tak),류성기(Sungki Lyu) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
This study deals with the TE(Transmission Error) of gear tooth profile by modifying a profile and lead of a surface of tooth. First, we experimentally confirmed that the TE is a synthesis of the sliding velocity between both gears. Since various types of TE appear in the experiments, we introduced definition of transmission error and the optimism design by modifying a surface parameters. The test stand's performance is then evaluated through a series of multiple torque transmission error tests. Comparisons are made between data recorded before and after the test stand's redesign, and subsequently repeatability studies are performed to verify the veracity of the measured data. Finally, the experimental results are compared to the analytical predictions of two different gear analysis programs.
질소이온코팅 SCM415강의 마찰ㆍ마모특성에 관한 연구
류성기(Sungki Lyu),하휘파(HuiBo He),이상현(Sanghyun Lee),이동규(Donggyu Lee),손유선(Yusun Son) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
SCM415 alloy was implanted with nitrogen ions using plasma source ion implantation(PSII), at a dose range of 1×10 to 6×10¹?N?㎝?². Auger electron spectrometry(AES) was used to investigate the depth profile of the implanted layer. Friction and wear tests were carried out on a block-on-ring wear tester. Scanning electron microscopy(SEM) was used to observe the micro-morphology of the worn surface. The results revealed that after being implanted with nitrogen ions, the frictional coefficient of the surface layer decreased, and the wear resistance increased with the nitrogen dose. The tribological mechanism was mainly adhesive, and the adhesive wear tended to become weaker oxidative wear with the increase in the nitrogen dose. The effects were mainly attributed to the formation of a hard nitride precipitate and a supersaturated solid solution of nitrogen in the surface layer.
질소이온코팅 SCM415강의 마찰ㆍ마모특성에 관한 연구
류성기(Sungki Lyu),하휘파(HuiBo He),이상현(Sanghyun Lee),이동규(Donggyu Lee),손유선(Yusun Son) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
SCM415 alloy was implanted with nitrogen ions using plasma source ion implantation(PSII), at a dose range of 1×10 to 6×10¹?N?㎝?². Auger electron spectrometry(AES) was used to investigate the depth profile of the implanted layer. Friction and wear tests were carried out on a block-on-ring wear tester. Scanning electron microscopy(SEM) was used to observe the micro-morphology of the worn surface. The results revealed that after being implanted with nitrogen ions, the frictional coefficient of the surface layer decreased, and the wear resistance increased with the nitrogen dose. The tribological mechanism was mainly adhesive, and the adhesive wear tended to become weaker oxidative wear with the increase in the nitrogen dose. The effects were mainly attributed to the formation of a hard nitride precipitate and a supersaturated solid solution of nitrogen in the surface layer.