Composite Rolling Test Control Method of Gear and Software by Guo Xiaodong, Zhang Hongli, Zhang Weiqing, Wang Ge, Huang Gang

“…The key techniques,such as automatically aligning tooth,automatic backlash adjust,electric closed coupling loading,measuring and analysis are solved. …”
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Conservative Management of Invasive Cervical Resorption: A Case Report by Youssef Abdullah Algarni

“…Clinically, it manifests as a pink stain on the cervical part of the tooth. It may be due to visualization of the densely vascularized granular tissue across the resorbed structure of the tooth. …”
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Influence of Surface Roughness of Spiral Bevel Gear on Oil Film Life of Starved Elastohydrodynamic Lubrication by Huang Shangren Huang Pengpeng

“…Taking the tooth surface of spiral bevel gear after grinding as study object, according to the grinding principle of spiral bevel gear, the grinding mask of tooth surface is solved, and the life prediction equation of the elastohydrodynamic lubrication oil film is established. …”
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Research on Contact Stiffness of Cycloid-pin Gear based on Monte Carlo Method by Suxun He, Yibin He, Yuchen Chen, Qiaosen Dai, Xiang Liu

“…In order to calculate the contact stiffness of cycloid-pin gear more accurately and guide its practical application， a method for calculating the contact stiffness of cycloid-pin gear based on Monte Carlo was proposed. In this method， the tooth profile functions of cycloid gear before and after the cycloid gear profile modification are established， and the influence of gear profile modification on the contact stiffness of cycloid gear is investigated. …”
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MESHING PERFORMANCE ANALYSIS OF TAPERED ROLLER ENVELOPING END FACE MESHING WORM DRIVE (MT) by WEN YuJie, LIAO HongHui, LIU ZaiXin, LI LingYu

“…The end face meshing worm drive with tapered roller envelope has many simultaneous meshing tooth pairs and can eliminate clearance. According to the gear meshing principle and differential geometry principle, the meshing mathematical model of the transmission pair is established, the worm tooth surface equation and meshing function are deduced, and the meshing performance calculation formula is obtained. …”
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Modal Analysis and Optimization Method of Flexspline of Harmonic Reducer by Yang Wang, Qianqian Liu, Xiaobiao Mu, Hao Wang

“…In response to the design requirements of miniaturization，lightweight and high resonance frequency of the flexspline，the inner diameter，aspect ratio，thickness-diameter ratio and tooth width coefficient of the flexspline are used as research variables. …”
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RELIABILITY OPTIMIZATION DESIGN ON SHEARER’S RANGING ARM GEAR TRANSMISSION SYSTEM by LI FengJiang, ZHANG Jie, LIAO YingHua, LI QingChen

“…In the process of design shearer ’s ranging arm gear transmission system,by using the method of reliability design theory,derived gear strength and stress assumed to obey normal distribution when tooth surface contact fatigue strength and tooth root bending fatigue strength were taken as constraint conditions,and the volume of gear system as objective function,then genetic algorithm optimization toolbox of MATLAB was used to solve the optimization mathematic model. …”
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Simulation of Double Circular Arc Profile Spiral Bevel Gear Form Grinding Machining based on VERICUT by He Zhiwei, Duan Jianzhong, Li Youzhi

“…The feasibility of machining double circular arc profile spiral bevel gear by numerical control forming grinding method is verified by VERICUT machining simulation.The tool path of the bevel gear and the tooth surface equation of the circular arc profile spiral bevel gear are studied，the axial cutting shape of the forming grinding wheel is obtained by the contact condition formula of the grinding surface and the tooth surface of the grinding wheel.Then，the selection criteria of the number of axes of the CNC forming gear grinding machine are proposed，and the models of the machine tool，forming grinding wheel and blank are established in VERICUT.Finally，the machining simulation of the double circular arc profile spiral bevel gear proves that the CNC forming grinding method can be used to process such gears，technical support for the application of CNC forming grinding on bevel gears.…”
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Analysis of Transmission Characteristic of Straight Bevel Gear and Zero Spiral Bevel Gear by Li Duo, Hu Yumei

“…According to the simulation results,the gear contact force,tooth surface contact stress,tooth root bending stress and vibration of large gear are compared and analyzed. …”
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Study on Active and Passive Control of Order Vibration for Electric Vehicle Power Train by Yuanyuan Zhang, Peng Yu, Jian Wang

“…Finally， order vibration control effect after tooth modification is verified by establishing electric vehicle power train mechanical simulation model. …”
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Association of Mesiodentes and Dens Invaginatus in a Child: A Rare Entity by A. N. Sulabha, C. Sameer

“…Mesiodens is a supernumerary tooth, in the central region of premaxilla between two central incisors. …”
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Kinematic Characteristic Analysis of Hypoid Gear based on Two Kinds of Eigenfunction by Bingyang Wei, Ke Zhang, Bo Zhang, Yuliang Guo

“…It lays a foundation for further topological design and meshing performance control of tooth surface.…”
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Study on the Crack Propagation Life of the High-speed Train Gear by Li Gang, Li Xiuhong, Ren Jiajun, Qin Xiaofeng, Pang Yinming

“…The crack propagation characteristic property of the high-speed train gears is researched,the location of crack initiation is determined by a statics analysis and building gear pair model in the ABAQUS software.A finite element model of helical gear pair with crack at tooth root is established by ABAQUS software,then the stress intensity factor of the different nodes of crack tip is calculated based on the theory of linear elastic fracture mechanics.Then,the way and the growth trajectory of the crack is studied,the propagation life of the crack at tooth root are obtained by calculation.Based on the obtained result,the influence of load magnitude and other factors on the crack propagation life is discussed.The study indicate that the crack expands slowly at first and then faster and faster,the influence of load magnitude on the crack propagation life is obvious.…”
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Research on Laser Precision Measurement of Helical Angle of Helical Cylindrical Gear by Zi Hao, Song Aiping, Chu Yuegang, Zhou Ye, Yu Chenwei

“…According to the least square method， the collected points on the measured helical gear end section are fitted into a smooth curve （tooth profile）， and the intersection points between the curve and the indexing circle are obtained. …”
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Drawing Analysis and Calculation of Root Transition Curves of Root Cutting Gears by Zhou Yanfang, Zhang Wei, Hou Keqing

“…According to the parameters and geometric dimensions of the gear, the parametric equations of the transition curve and involute line of the root cutting gear are established based on the principle of machining the gear with the generating method, the tooth shape diagram of the root cutting gear is accurately drawn, and the minimum chord tooth thickness and maximum root cutting radius are accurately calculated with the Matlab software. …”
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Influence of Engagement Algorithm and Structure Parameter on Harmonic Drive by Luo Ji, Sha Chun

“…In order to analyze the influence of the engagement algorithm and structure parameter on the transmission performance of harmonic drive（ HD）,the involute tooth profile is used for the HD,an exact engagement algorithm and its approximation are obtained based on the envelope theory and the exact calculations for the rotation angles of flexspline（ FS）,moreover,the conjugate existent domain（ CED） and the conjugate tooth profile（ CTP） that based on the aforementioned algorithm are studied,furthermore,the influence of the wave generator（ WG） and the coefficient of radial displacement are researched here. …”
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Simulation of Quadruple-arc Gear Form Grinding Machining based on VERICUT by Ren Zhongyi, Zhao Yi, Duan Jianzhong

“…According to the principle of form grinding,the VERICUT software is used to simulate the machining of quadruple- arc tooth profile gear. Firstly,according to the NC gear grinding machine,the machine tool model,gear blank model is set up and on the basis of the quadruple- arc tooth profile gear form grinding wheel cross- sectional shape,grinding wheel model is established,with reference to the machine tool structure and form grinding motion,NC simulation program is written. …”
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STUDY OF CONTACT FATIGUE STRENGTH FOR ISOTROPIC BARREL FINISHING GEAR by ZHAO GuangHui, LIU ShiJun, LI JiQiang, XU WenBo, LIU Jie, WANG XiaoPeng

“…After the barrel finishing of the tooth surface,the micro-surface is isotropic. According to the Hertz theory and the theory of contact fractal strength of gears,the influence of microstructure contact stress calculation was discussed. …”
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Research of On-line Detection System of End-face Run-out of Synchronizer Gear Set by Shen Kai, Liu Feifei, Meng Dejiao

“…An on-line detection instrument for synchronizer tooth sets is designed. The instrument can better complete the data acquisition,run-out error processing and display. …”
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An Improved Method of Gear Geometry Contact Simulation by Wang Zhengrong, Du Jinfu, Liu Kai, Wen Jianshuang

“…To solve the problem of the contact ellipse in the geometric contact simulation of gear teeth which needs the numerical approximation of the quadratic approximation of the tooth surface and the complicated curvature derivation,the method of contact ellipse calculation based on numerical iteration is proposed. …”
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