RESEARCH AND VERIFICATION OF CONTACT STRESS CALCULATION METHOD FOR FIVE-BALL FATIGUE TESTING MACHINE by JIAO Yan, YU QingJie, HAN Song, LIU JinLing, ZHAO SiYang

“…To accurately calculate the contact stress of the five-ball fatigue testing machine tooling,the tooling design contact angle is determined by the geometric size relationship. …”
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Tooth Contact Analysis and Adjustment Calculation of Real Tooth Surfaces of Hypoid Gears by Han Kunpeng, Yang Jianjun

“…Based on the two-dimension golden section method for increasing the density of gear grid mesh points, the contact analysis algorithm for discrete real gear surface is established to carry out the contact information of real gear surface and adjust parameters of contact patterns, which is applied for adjusting of machining-tool settings conveniently. In the end, a hypoid gear pair of automobile driving axles is used to verify the feasibility and correctness of the proposed algorithm by rolling tests, which shows that the contact pattern by discrete tooth contact analysis is consistent with the real rolling test.…”
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Optimization Design for Gear Pair Transmission with Considering Torsional Stiffness Constraint by Han Lin, Xu Lixin

“…The torsional stiffness of gear pair transmission chain usually employed in rotary table plays an important role in both static and dynamic characteristics of machine tools. Taking the gear pair transmission chain as study object,considering the mesh stiffness of gear pair & torsional stiffness of shaft,a general mathematical model for torsional stiffness of gear pair transmission chain is established. …”
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Dynamics Simulation and Fatigue Life Analysis of Precision Servo Reducer by Liu Xinmeng, Zhang Liyong, Wang Changlu, Yang Huibo

“…The characteristic of precision planetary reducer are small size,high precision,small backlash and high stiffness.So it is widely used in robotics,machine tools,medical,military,printing and other industries.But the fatigue failure is easily to occur in precision planetary reduce for its small module,wide speed range and variable load.According to the characteristic of precision servo reducer,the gear dynamic meshing force and fatigue life of planetary gear train are obtained through the dynamics and collaborative simulation.The results show that the sun gear which is the weakness of system can well meet the design requirements.This method which using the dynamic meshing force to analyze the fatigue life of precision servo reducer is more in line with the actual working condition of the reducer.And it can provide the basis for product design and development.…”
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A Milling Method for Elliptic-arc-tooth-trace Cylindrical Gear by Zhao Kunpeng, Song Aiping, Dou Chaoran, Zi Hao Chu, Yuegang

“…The forming processes of the machining tools and elliptic-arc-tooth-trace are analyzed by the rack and pinion model,and the milling principle is put forward according to which the milling of the gear is completed. …”
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Stiffness Model and Experimental Study of Hydrostatic Spindle System considering Rotor Swing by Runlin Chen, Xingzhao Wang, Chen Du, Jun Zha, Kai Liu, Xiaoyang Yuan

“…For high-end CNC machine tools, the stiffness of the spindle system is one of the most important performance indicators. …”
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Complementary Machining – Machining Strategy for Surface Modification: A Review by Thabo Mathonsi, Rudolph Frans Laubscher

“…As a result, a variety of hybrid techniques have been created, such as complementary machining, which has the benefit of using conventional machine tools and their associated cutting tools. The study on complementary machining is reviewed in the article. …”
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Hobbing Error and Adjustment of Worm-gear Tooth Surface by Lu Jianwei, Chen Ningxin

“…At present,there are two different kinds of worm-gear hobs in domestic: outer diameter increment hob and pitch diameter increment hob.The outer diameter increment hob has been eliminated a long time ago in the most of the developed industrial countries because of its short service life.However,the pitch diameter increment hob needs to set mounting tilt angle and manufacturing center distance that differs from nominal center distance during hobbing.And following the hob reshaping that reduces the hob pitch diameters,the tilt angle and manufacturing center distance have to be re-calculated and adjusted.Any incorrectness of those two settings will cause worm-gear tooth surface error.The calculation equations of tilt angle and manufacturing center distance are introduced,the error of worm-gear tooth surface caused by the above incorrectness machining parameters settings are analyzed.Two calculation examples,one for single head worm-gear and another for multi-starts of worm are given readers to reveal the distribution of the worm gear tooth surface error,the basis for correcting the machining tool parameter error is provided.…”
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Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic by Runlin Chen, Qin Han, Menghao Zhang, Yanchao Zhang, Longlong Li, Yahui Cui

“…In order to research the influence of the time-varying stiffness of rolling bearings on the precision of spindle rotation of machine tools， a time-varying stiffness model of rolling bearings are established by considering the radial clearance. …”
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n-FFT COMPRESSED SENSING ALGORITHM OF SMART DIMENSIONALITY REDUCTION METHOD AND ITS APPLICATION IN FEATURE EXTRACTION AND CLASSIFICATION OF GEAR SYSTEM by CHEN Xiao, HUANG ChuanJin

“…Mechanical transmission is widely used in vehicles,machine tools,construction machinery and other engineering fields,the study of mechanical transmission reliability,damage mechanism,fault diagnosis and signal processing method has great significance and value.The traditional signal processing algorithms,such as FFT algorithm,the fast Fourier transform algorithm,since its fast speed,stable spectrum analysis,has been widely used in engineering. …”
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Investigation of Sliding Mode Control in the Nonlinear Modeling of Cordless Jigsaws by Sándor Apáti, György Hegedűs, Sándor Hajdu, Péter Korondi

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A Hybrid Chatter Detection Method Based on WPD, SSA, and SVM-PSO by Erhua Wang, Peng Yan, Jie Liu

“…It affects the machining accuracy of products and decreases the processing efficiency of machine tools. Thus it is very crucial to develop an effective condition monitoring system to extract the chatter feature before chatter vibration grows. …”
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Mechanism of Drag Reduction in Floating Plate of Paddy Field Based on CFD by Xiaoze Yu, Baofeng Zhang, Jiahan You

“…In order to study drag reduction mechanism in mud parts’ operation of surface machine tools for paddy field, this paper takes floating plate, the main working part of laminating mechanism, as the research object and systematically analyzes the mechanism of action of elevation angle, curved angle, penetrating angle, and local microstructure of floating plate on working resistance and local fluid flow characteristics of the laminating structure based on VOF model in Fluent. …”
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EXPERIMENTAL RESEARCH ON FOIL HYDRODYNAMIC AIR BEARING by LONG Chao, ZHANG YueChun, PENG RuiTao, HU YuNong

“…Because of its superior dynamic performance, it is widely used in high-speed turbine machinery, high-precision machine tools, aviation, aerospace, national defense and other high-end equipment fields. …”
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Effect of a Rapid Tooling Technique in a 3D Printed Part for Developing an EDM Electrode by Turki Alamro, Mohammed Yunus, Rami Alfattani, Ibrahim A. Alnaser

“…However, CCF can get spoiled as high temperatures are generated on the machining tool, and the plastic core hardly sustains such high temperatures.…”
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Analysis of Dynamic Characteristics of Grease-Lubricated Tapered Roller Bearings by Zheng-Hai Wu, Ying-Qiang Xu, Si-Er Deng

“…Tapered roller bearings (TRBs) are applied extensively in the field of high-speed trains, machine tools, automobiles, etc. The motion prediction of main components of TRBs under grease lubrication will be beneficial to the design of bearings and the selection of lubricating grease. …”
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Machine-Vision-Based Enhanced Deep Genetic Algorithm for Robot Action Analysis by Guifeng Wang, Lu-ming Zhang, Yichuan Sheng

“…The machine-driven products processed by CNC machine tools are divided into multiple parts, which are often transmitted to unqualified processing crystals due to the error of the part’s posture, thus affecting the projection effect. …”
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Modeling and Simulation of Process-Machine Interaction in Grinding of Cemented Carbide Indexable Inserts by Wei Feng, Bin Yao, BinQiang Chen, DongSheng Zhang, XiangLei Zhang, ZhiHuang Shen

“…Commonly, the process and machine tools were dealt with separately, which does not take into consideration the mutual interaction between the two subsystems and thus cannot represent the real cutting operations. …”
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Melting behaviour and crystallisation kinetics of carbon-fibre-reinforced low-melting poly(aryl ether ketone) by Jan-Lukas Stüven, Sebastian Heimbs, Carsten Schmidt

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THE RELATIONSHIP BETWEEN NOISE INTENSITY AND WORKER CHARACTERISTICS WITH HEARING DISORDERS IN DENTAL LABORATORY JAKARTA by Sri Wiwik Wiyanti, Endang Prawesthi, Mujiwati Mujiwati

“…Background: Along with the development of processing goods using machine tools and equipment as well as the use of chemicals, one of the impacts is loud or noisy sound, which can be interpreted as unwanted sound or exceeding threshold and has an opportunity to damage hearing so that can be detrimental. …”
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