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RISS 인기검색어
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- 저자 : Zhipeng Tong (검색결과 3 건)
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A helix slope deviation compensation model for milling small modulus copper electrode gears
Zhipeng Feng,Zhao-Yao Shi,Shoujin Lin,Aijun Tong,Peng Wang,Guoqing Wu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7
When a milling tool is used to mill small modulus copper electrode gears (SMCEG), the deformation is inevitable, thus leading to the helix slope deviation (HSD) of copper electrode gears (CEG). To compensate the influence of milling tool deflection (MTD) on the HSD, a universal HSD compensation model was established for different sizes of milling tools. First, using the principle of orthogonal experiment, a linear regression model of milling parameters and milling tool radius is established. Secondly, the average value of the HSD obtained by the gear measuring instrument is converted into the maximum of MTD according to the principle of helix line formation. The maximum deflections of the milling tools are used as the response value of the regression analysis to fit the maximum deflection curve of the milling tool. Through the reverse adjustment of the rotation angle of the rotating motor, the HSD compensation is realized. Finally, the model was verified by the milling tests. The results showed that the helix deviation reached the requirements of level 4 to 5 in GB/T 38192-2019, and proved the correctness of the established MTD model. The model is significant for milling SMCEG.
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Jiangang Liu,Zhipeng Tong,Gao-Hong Yu,Xiong Zhao,Haili Zhou 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.5
Non-circular gears with small curvature radius pitch curve are often used in the mechanical transmission of special motion path, but this kind of non-circular gear produces serious undercutting. Therefore, this research presented a kind of variable-involute and variable-cycloid composite tooth profile (VIVC-CTF). A transmission ratio curve of non-circular gear was designed by using Fourier function. The tooth profile equation of VIVC-CTF and its conjugate tooth profile equation were constructed on the basis of the normal and envelope methods. The influence of slip coefficient and ellipse eccentricity on the VIVC-CTF was investigated, and the variation of slip coefficient and eccentricity on the meshing line length, theoretical contact ratio, and pressure angle at pitch curve was analyzed. The meshing experiment of the VIVCCTF non-circular gear transmission mechanism was carried out on the basis of high-speed camera technology. The theoretical results of the transmission ratio were consistent with the experimental results.
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Tianxiang Sun,Kai Jin,Wei Wang,Wen Li,Tong Wang,Tengxun Yang,Jia Cheng,Zhipeng Zhao,Shougang Chen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
Here, a long-term anti-corrosive epoxy (EP) coating based on nano-hybrid filler was developed. The surfaceof graphene oxide (GO) was aminated with (3-aminopropyl) triethoxysilane (APTES), and then theporous covalent organic framework (COF) was in-situ grown on amino functionalized graphene oxide(FGO) nanosheets by Schiff-based reaction to prepare FGO-COF nanofillers. Different characterizationmethods proved the successful modification of GO nanosheets with COF particles. The excellent waterresistance of composite coatings was characterized through contact angle, adhesion, and water uptaketests. Transmission electron microscope (TEM) and molecular dynamics (MD) methods showed thatthe grafting of COF enhanced the dispersion and compatibility of GO in the coating. EIS measurements,salt spray analysis and cathodic delamination test indicated the significant improvements in the protectiveproperties of the composite coatings compared with pure EP coating. The low-frequency impedancemodulus of 1% FGO-COF composite coating reached higher than 6.8 109 Xcm2 after immersed in seawater for 60 days. In addition, the 1% FGO-COF composite coating performed only 34% delamination ratioafter 120 h cathodic delamination test.
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