Article
Green & Sustainable Science & Technology
Vishal Kharka, Neelesh Kumar Jain, Kapil Gupta
Summary: This study evaluates the sustainability and performance of gear hobbing under different lubrication environments. The results show that hobbing with minimum quantity lubrication significantly reduces lubricant consumption, extends hob cutter life, improves productivity, and reduces energy consumption compared to hobbing with flood lubrication. Additionally, spur gears manufactured with minimum quantity lubrication have higher quality.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Felix Steinmeyer, Dorothee Hueser, Rudolf Meess, Martin Stein
Summary: The novel physical measurement standard (PMS) for roughness measurements on involute gears bridges the gap between roughness measurements on planar surfaces and gear measurements, providing calibrated roughness values for various parameters and allowing measurements with both classic profilometers and gear measurement systems.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Zeliang Xiao, Xi Shi, Xi Wang, Xiaolong Ma, Yunting Han
Summary: The lubrication performance of herringbone gear is degraded by increased pressure and temperature rise due to larger tooth surface roughness and rotational speed. In the start-stop phase, the tooth wear depth of herringbone gear may be greatly reduced with a larger start-stop acceleration. Overall, the research indicates that large tooth surface roughness is more likely to cause thermo-mechanical and wear failures in herringbone gear drive compared to high load.
Article
Engineering, Mechanical
Mingyang Wu, Jianyu Zhang, Chunjie Ma, Yali Zhang, Yaonan Cheng
Summary: Contour bevel gears are widely used in automobile manufacturing, shipbuilding, and construction machinery due to their high coincidence, low noise, and large bearing capacity. However, poor surface quality reduces the effective contact area between gear mating surfaces, affecting fit stability and transmission accuracy. Therefore, optimizing the surface quality of contour bevel gears is of great significance.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Yan He, Wei Zhang, Yu-Feng Li, Yu-Lin Wang, Yan Wang, Shi-Long Wang
Summary: The existing roughness measurement methods based on machine vision are unable to accurately measure irregular components with complex shapes, such as helical gears. This paper proposes a novel visual approach for roughness measurement of helical gears, utilizing a region of interest extraction method and convolutional neural network evaluation for improved accuracy and efficiency. The accuracy and generality of this approach are validated through comparison with stylus device-based measurements in two cases of helical gear and leadscrew roughness.
Article
Engineering, Aerospace
Wieslaw Budzisz, Adam Marciniec
Summary: Achieving roughness parameters and non-directional surface texture on tooth flanks is crucial for the durability and performance of highly loaded gears. Despite various well-known finishing techniques, there is still a lack of a simple method that can be applied to optimize cost, time, and waste in the manufacturing process. This study investigates the use of Stream Finishing (SF), a non-chemical, abrasive process, for removing material from gear teeth flanks. The surface condition before and after applying the SF process parameters is examined. Defining the proper manufacturing process for obtaining the required gearbox durability and optimizing parts cost is important for transmission groups, and process parameter definition should be determined individually for each application.
Article
Metallurgy & Metallurgical Engineering
Xiu-jiang Shi, Xi-qun Lu, Tao He, Wen Sun, Qing-shun Tong, Xuan Ma, Bin Zhao, Dong Zhu
Summary: This paper investigates the friction and flash temperature in marine transmission gears, using a numerical solution procedure and mixed lubrication simulation to analyze the influence of different surface roughness. It is observed that heavy load and low rotational velocity conditions lead to significantly increased friction and temperature, while optimizing gear design parameters can greatly improve performance.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Engineering, Mechanical
Jiang Zhao, Wei Sheng, Zhengminqing Li, Hong Zhang, Rupeng Zhu
Summary: Considering tooth surface micro-morphology, a coupling analysis model for wear characteristics of involute gear under mixed lubrication was established. The mixture of squalane base oil and polyisoprene showed higher film thickness and lower coefficient of friction compared to polyalphaolefin oil and mineral oil. Increasing lubricant viscosity was found to reduce direct rough contact area and load ratios, thereby reducing wear.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Xin Yu, Yunyun Sun, Shijing Wu
Summary: In this study, a generalized close-formed model of the friction coefficient between fractal surfaces in mixed lubrication is presented. A mathematical transformation from asperity area to oil film thickness is conducted to establish an analytical fractal model of oil film thickness. A dynamic film thickness model with external load under the determination of the surface roughness is proposed. The effects of fractal parameters and important working parameters on friction coefficient are analyzed, and comparison with experimental data is conducted. This work provides a general analytical expression for friction coefficient in mixed lubrication with explicit form and wide applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Xin Pei, Wei Pu, Jialong Yang
Summary: This paper investigates the meshing behaviors of spur gears with pit defects, revealing that defects can increase the asperity contact ratio, cause fluctuations in contact stiffness and normal distance. The dimensions and depth of defects have different impacts on these parameters.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Pan Wang, He Liang, Liang Jiang, Linmao Qian
Summary: Surface roughness has a significant impact on friction and wear, especially at the nanoscale. This study investigates the effect of nanoscale surface roughness on sliding friction and wear. The research reveals that reducing surface roughness decreases friction and wear in mixed lubrication, but excessively low roughness can lead to friction failure. The findings enhance our understanding of the role of surface roughness in tribology.
Article
Engineering, Mechanical
Xin Pei, Wei Pu, Zhongzheng Wang
Summary: In this study, a transient mixed lubrication model and a two-dof-torsional dynamic model for spiral bevel gears are proposed to analyze the gear surface defects during manufacturing and service. The results show that the surface defect significantly affects the meshing process of spiral bevel gears and changes the dynamic response, providing a theoretical reference for identifying early failures caused by defects based on dynamic signals.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Wen Sun, Xiujiang Shi, Deliang Hua, Renze Li, Xuan Ma, Bin Zhao, Xiqun Lu
Summary: Marine transmission gears often face severe working conditions, leading to stress concentration and potential wear issues. Optimizing gear parameters and surface treatments can improve the stress state and contact effect of gears. The combination of different materials has a significant impact on the maximum stress and friction coefficients of gears.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2021)
Article
Engineering, Electrical & Electronic
Jiang Zhao, Xiaofeng Yu, Wei Sheng, Zhengminqing Li, Hong Zhang, Rupeng Zhu
Summary: In this study, a dynamic behavior prediction model of the gear transmission system was established, considering the effects of tooth surface wear. The wear characteristics of the gear pair along the meshing line were analyzed through simulations, and the impacts of wear conditions, operating torque, and speed on the dynamic characteristics were discussed. The results showed that the transmission error and vibration displacement amplitude increased gradually with the wear degree, and the fluctuation of gear dynamic characteristics intensified. The fluctuation of gear dynamic characteristics increased with the increase in torque, and initially increased and then decreased with the increase in rotating speed.
Article
Chemistry, Analytical
Sujeet Kumar Chaubey, Neelesh Kumar Jain, Kapil Gupta
Summary: This paper presents the development of a lightweight aluminium gear of miniature size using wire-assisted thermoelectric erosion machining (WTEM). The experiment successfully confirmed the manufacturing quality parameters and surface roughness of the miniature gear, while investigating the influence of WTEM parameters on surface roughness.
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)