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RISS 인기검색어
- 검색키워드
- 저자 : Rongjing Hong (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Research on the design of skiving tool for machining involute gears
Erkuo Guo,Rongjing Hong,Xiaodiao Huang,Chenggang Fang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
Although the power skiving of gear process has demonstrated excellent capability in the latest research, the key to the successful applicationof skiving is the design of suitable tools. We propose a method to design and calculate the skiving tool for machining involutegears. First, according to the principle of power skiving for internal gear, the helical skiving cutter was designed with the modificationcoefficient and the tapered teeth that were oriented under a helix angle. The structure can avoid friction and interference, as well as ensurethe even cutting load during the processing of skiving. Then, the kinematical model of power skiving was established and the profile ofcutter with a rake angle was calculated based on the crossed helical gear engagement theory. Finally, using a helical cutter to simulate themachine for an internal spur gear, the results demonstrate that the proposed design method of skiving cutter can avoid interference andmeet the requirement of power skiving.
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A correction method for power skiving of cylindrical gears lead modification
Erkuo Guo,Rongjing Hong,Xiaodiao Huang,Chenggang Fang 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.10
The latest research clearly demonstrates the excellent capability of the gear skiving technology. To improve the twisted flanks of cylindricalgears when performing a lead modification in skiving process, a correction method is proposed. First, a kinematic model ofpower skiving and correction tooth surface are established based on the engagement principle of crossed helical gear. The phenomenonof flank twist in the skiving process is investigated and the counter lines of modified error on both flanks are obtained. Then, a correctionmethod for cylindrical gears lead modification is proposed to correct the twisted tooth flanks by optimizing the cutter profile. In thismethod, the cutter profile is formulated as B-spline curves using a curve fitting technique, and a sensitivity matrix and correction polynomialcoefficients are derived. Thus, the skiving tooth flank can be approximated to the desired tooth flank by adjusting the coefficientsof the polynomials. Finally, a numerical example shows that the optimization method of cutter profile can effectively reduce the modifiederrors as well as improve the modification twist in gear skiving process.
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Jin Ge,Hong Rongjing,Lu Yuquan,Gholinia Fatemeh 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4
Severe climate change, caused by the rise of industry and human activities, is one of the world's major issues affecting energy-generating resources. Anticipating hydropower potential is essential for developing, managing, and operating an optimal hydropower plant. The hydropower potential over the next 20 years is estimated in this study based on climate change. In addition, a novel approach for more accurate runoff estimation has been developed in this work, based on the direct influence of runoff on hydropower potential. The Modified Aquila Optimizer (MAO) algorithm was used to optimize this Deep Learning Neural Network (DLNN) model. The runoff is expected to decrease in the following years, according to the improved model's simulation. The rate of change of hydropower potential will fluctuate from a minimum of around − 112.4 MW to a high of about − 171.23 MW, according to predictive potential predictions. Rising temperatures and reduced rainfall in the following years will cause these negative changes in hydropower capacity.
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Xuehai Gao,Xiaodiao Huang,Hua Wang,Rongjing Hong,Jie Chen 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.10
The carrying capability and the service life of a four-point-contact slewing bearing are influenced significantly by its raceway geometry parameters. In this paper, the carrying capability is characterized by the maximal contact stress in the paper. The usual industry practice is to specify the service life as the L10 life. The geometry parameters, cross section clearance, ratio of curvatures, rolling ball diameter,and initial contact angle, are also considered. The sensitivity of each parameter influencing the carrying capability and the service life is discussed as well. The results show an interesting phenomenon, indicating that the maximal contact load and the maximal stress do not always have the same varying trend when discussed parameters vary. The developed design can be utilized as a reference for an optimal slewing bearing design. If a slewing bearing of high static carrying capability is required, it can be designed with large ratio of curvatures and rolling ball diameter. In terms of service life, the cross section clearance and the initial contact load should also be considered.
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