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Artykuły w czasopismach na temat „ROLLING BALL”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Hewitt, Paul. "ROLLING BALL." Physics Teacher 45, no. 9 (2007): 534. http://dx.doi.org/10.1119/1.2809144.

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2

Королев, Альберт, Albert Korolev, Михаил Захарченко, Mihail Zakharchenko, Кристина Мищенко, and Kristina Mishchenko. "Technological increase of static load carrying capacity of local raceways in ball bearings through ball rolling-off." Science intensive technologies in mechanical engineering 2018, no. 12 (2018): 28–32. http://dx.doi.org/10.30987/article_5bf70416c07a10.01524769.

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The paper reports the consideration of the ball rolling-off mechanism of ball bearing rings. The regularities of the distribution of external combined load between balls are defined. There is offered a simulator of a rolling-ff process allowing the ratio definition between a load upon balls and acting factor including the angle of balls contact with a race and a correlation of a radial and axial external loads.

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3

Ulegin, К. А., K. N. Shvedov, А. N. Borodin, and V. Yu Rubtsov. "The new ball-rolling mill of EVRAZ NTMK – new possibilities for customers." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 76, no. 6 (2020): 602–8. http://dx.doi.org/10.32339/0135-5910-2020-6-602-608.

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In view of increase of ferrous and nonferrous ores mining, the need for grinding balls, used for the ores grinding in the process of concentration, is also increasing. Description of technical solutions, realized at accomplishment of an investment project at JSC EVRAZ NTMK, presented. The investment project on the technical modification of the rail and beam shop included construction of the new ball-rolling mil further to production of steel grinding balls. The new ball-rolling mill, which was put into operation in 2018, has a possibility to produce ball of diameter from 60 up to 120 mm with h

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4

Dumitrascu, Alina Corina, Gelu Ianus, and Dumitru Olaru. "Influence of the Contact Pressure on the Rolling Resistance Moments in Dry Ball-Race Contacts." Applied Mechanics and Materials 658 (October 2014): 305–10. http://dx.doi.org/10.4028/www.scientific.net/amm.658.305.

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Based on a theoretical model and an experimental methodology for defining the rolling resistance moments in a modified thrust ball bearing having only 3 balls, the authors experimentally investigated the influence of the Hertzian contact pressure on rolling resistance moments between a ball and a race. The experiments were realized with balls having diameters between 1.588 mm and 4.762 mm with maximum Hertzian pressure between 0.2GPa and 1GPa, operating for rotational speed between 60rpm to 210 rpm. The experiments evidenced that the measured values of the rolling resistance moments have highe

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5

Wang, Jiapeng, Baoyu Wang, Chaoyang Sun, and Chuanbao Zhu. "Numerical and experimental study for process improvement of cross-wedge rolling of bearing steel balls." MATEC Web of Conferences 401 (2024): 01003. http://dx.doi.org/10.1051/matecconf/202440101003.

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The uniaxial compression experiments were conducted on GCr15 bearing steel to obtain the flow stress curves under hot deformation conditions. Based on the results of uniaxial compression experiments, finite element modeling was conducted on the cross wedge rolling (CWR) of GCr15 bearing steel balls, and numerical simulation was conducted using Simufact Forming 16.0. The results show that the distribution of effective strain of existing CWR steel balls is uneven, which may lead to uneven quality of steel balls. In addition, the three principal stresses at the center of the steel balls are all t

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6

Octa, Dhea, Defi Astriani, Devia Purwaningrum, and Wiwik Suatin. "Metode Bermain Bola Bergilir (MB3) untuk Meningkatkan Interaksi Sosial Anak Down Syndrome." eL Bidayah: Journal of Islamic Elementary Education 6, no. 2 (2024): 53–64. https://doi.org/10.33367/jiee.v6i2.5715.

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Socially, children with down syndrome experience difficulties in establishing social relationships with the environment. So social interaction is very important for children, especially children with special needs, one of which is down syndrome. This research aims to improve social interaction in children with down syndrome. One intervention that can be used to increase social interaction in children with down syndrome is the Rolling Ball Playing Method (MB3). The Rolling Ball Playing Method (MB3) is a modification of the ball relay game, in concept it is the same as rotating the balls in turn

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7

Chao, Paul C. P., Cheng-Kuo Sung, and Hui-Chung Leu. "Effects of Rolling Friction of the Balancing Balls on the Automatic Ball Balancer for Optical Disk Drives." Journal of Tribology 127, no. 4 (2005): 845–56. http://dx.doi.org/10.1115/1.2032992.

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This study is devoted to evaluating the performance of an automatic ball-type balance system (ABB) installed in optical disk drives (ODDs) with consideration of the rolling friction between the balancing balls and the ball-containing race of the ABB. Research has been conducted to study the performance of the ABB by investigating the nonlinear dynamics of the system; however, the model adopted to describe the rolling friction between the balancing balls and their race was a simple stick-slip type, which does not reflect the realistic contact dynamics, leading to an inaccuracy in predicting ABB

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8

Sun, Jian Lin, Zuo Xin Zhu, and Peng Fei Xu. "Study on the Lubricating Performance of Nano-TiO₂ in Water-Based Cold Rolling Fluid." Materials Science Forum 817 (April 2015): 219–24. http://dx.doi.org/10.4028/www.scientific.net/msf.817.219.

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A type of water-based cold rolling fluid has been developed by adding TiO2 nanoparticles. The tribological behavior of nanoTiO2 water-based rolling fluid was investigated by using four-ball machine. The worn surfaces of the steel balls were analyzed by using OLYMPUS laser confocal microscopy. Results indicate that nanoTiO2 nanoparticles significantly improved the anti-wear properties in the way of micro-ball bearing and perfecting the tribological behavior of water-based rolling fluid. The cold rolling experiment shows that the nanoTiO2 water-based rolling fluid had a good rolling lubricant pe

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9

Cross, Rod. "Transition from bouncing to rolling on a horizontal surface." American Journal of Physics 92, no. 8 (2024): 571–75. http://dx.doi.org/10.1119/5.0160345.

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If a ball is incident obliquely on a horizontal surface and is allowed to bounce more than once, then it is likely to bounce many times before it starts rolling along the surface. The number of bounces before rolling commences depends on the initial vertical speed and the normal coefficient of restitution. The transition from bouncing to rolling is examined using a simple theoretical model and is compared with experimental data obtained by filming the process with a video camera. We find that the final rolling speed is proportional to the initial horizontal speed of the ball and depends on the

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10

Dunn, Donald. "Get the Ball Rolling." IEEE Industry Applications Magazine 14, no. 3 (2008): 72–73. http://dx.doi.org/10.1109/mias.2008.918510.

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11

Harries, Judith. "Get the ball rolling." Practical Pre-School 2015, Sup179 (2015): 11–12. http://dx.doi.org/10.12968/prps.2015.sup179.11.

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12

White, Hilary. "Getting the ball rolling." Practical Pre-School 2014, Sup167 (2014): 7–8. http://dx.doi.org/10.12968/prps.2014.1.sup167.7.

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13

Anderson, G. Christopher. "SNO ball starts rolling." Nature 343, no. 6254 (1990): 104. http://dx.doi.org/10.1038/343104b0.

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14

Shvarts, D. L., I. K. Galim’yanov, and V. Yu Rubtsov. "Tuning Parameters of a Ball-Rolling Mill for Rolling of Grinding Balls." Russian Metallurgy (Metally) 2023, no. 13 (2023): 2230–36. http://dx.doi.org/10.1134/s0036029523700325.

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15

Przondziono, Joanna, and Jan Szymszal. "Steel Strips Flattening in Ball Rolling Mill." Solid State Phenomena 165 (June 2010): 153–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.165.153.

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An effective and efficient production method of narrow and thin strips made of steel, non-ferrous metals and their alloys is wire flattening in a ball rolling mill. In this device cylindrical rollers have been replaced with balls of diameter ca. 15 mm. Proper selection of deformation process parameters enables to obtain strips with the required geometrical characteristics. Experimental planning method was applied to evaluate the influence of flattening process technological parameters on strip geometrical features. Statistical analysis enabled to determine mathematical models of stainless stee

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16

Rubtsov, V. Yu, O. I. Shevchenko, V. V. Kurochkin, and A. S. Oparin. "Distribution of temperature fields and specific reductions at grinding balls rolling." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 7 (2019): 834–39. http://dx.doi.org/10.32339/0135-5910-2019-7-834-839.

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During the high hardness grinding balls production the following to the process parameters is the key requirement. The temperature and the deformation uniformity are main parameters at the high hardness grinding balls rolling. Reduction forces can be estimated by modeling, but in this case, they were determined analytically, based on the distribution of the real specific reduction force over the observed temperature fields on the surface of the ball. Revealed a significant increase in the temperature of ball during the cross-helical rolling from equator to the poles from 880 °С to 940 °С. Esta

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17

Yang, S.-C., and C.-K. Chen. "The surface geometry of rollers with skew rolling of steel balls." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 5 (2001): 523–32. http://dx.doi.org/10.1243/0954406011520922.

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The ball shaping process is considered from a geometric viewpoint as a meshing pair of conjugate surfaces at the precise rolling stage. This viewpoint offers a simple method and procedure for determining the groove design of each forming roll in the skew rolling process of steel balls. Based on the envelope theory, a shape design of the forming roll is a composite of two helical grooves with constant pitch and variable pitch. Through this method, the mathematical model of the forming rolls for skew rolling, which can be used to design and manufacture a skew roller for manufacturing steel balls

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18

Nabilah, Alfufatin. "Facilitating Mentally Retarded Students in Learning English Vocabulary through Rolling Ball Media at SLB BC Sasanti Wiyata Surabaya." IJET (Indonesian Journal of English Teaching) 13, no. 1 (2024): 29–39. https://doi.org/10.15642/ijet2.2024.13.1.29-39.

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Abstract, each student has different needs and characteristics, and teachers must adapt learning techniques according to the needs and characteristics of students for successful learning. Learning media is one of the methods or tools used in the teaching and learning process. This is done to stimulate learning patterns in order to support the success of the teaching and learning process so that teaching and learning activities can be effective in achieving the desired goals. This also applies when teaching mentally retarded students, teachers can use the media to change information effectively

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19

Li, Yiling, Yinhu Xi, and Yijun Shi. "Estimation of rolling friction coefficients in a tribosystem using optical measurements." Industrial Lubrication and Tribology 70, no. 4 (2018): 680–86. http://dx.doi.org/10.1108/ilt-04-2016-0087.

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Purpose This paper aims to present a method to measure the rolling friction coefficient in an easy and fast way. The aim is also to measure the rolling friction coefficient between a small steel ball and a cylindrical aluminum surface. Design/methodology/approach An analytical model of the tribosystem of a freely rolling ball and a cylindrical surface is established. The rolling friction coefficient is evaluated from images recorded by a high-speed camera. The coefficient between a 1.58-mm diameter steel ball and a cylindrical aluminum surface is measured. A background subtraction algorithm is

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20

Sui, Jie Ying, Yan Wen Gong, and Wen Feng Liu. "Research on a New Type of Rolling Ball Isolator." Advanced Materials Research 194-196 (February 2011): 1929–32. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1929.

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In this paper, a new type of rolling ball isolator was developed. The rolling ball isolator isolates horizontal earthquake with SMA dampers to restore to normal position, and dissipate energy. The optimization of SMA-Rolling ball isolator is studied. Adopt MATLAB to build the shear model, and contrasts the earthquake response between the isolated structure and the un-isolated structure.

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21

Brearley, Maurice N., and Neville J. De Mestre. "Rolling of a rigid ball on a horizontal deformable surface." ANZIAM Journal 46, no. 2 (2004): 249–64. http://dx.doi.org/10.1017/s1446181100013821.

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AbstractThe rolling of a ball on a horizontal deformable surface was investigated under the assumptions that the ball was a rigid sphere and the surface was elastic. Finite strain theory was used to develop theoretical results which were found to match observations well in cases where the ball and surface involved were such as to ensure no slipping at the region of contact, including a lawn bowl rolling on a grass rink and a billiard ball rolling on carpet. The theory did not match well the behaviour of a golf ball on a grass green because the ball was too light to enforce the no-slipping cond

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22

Ren, Xiao Zhong, and Yong Qing Liu. "Study on the Influence of Deforming Velocity on Steel Ball Quality Based on DEFORM." Applied Mechanics and Materials 117-119 (October 2011): 1806–9. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1806.

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The ball defects generated in skew rolling process have restricted to large extent the further application of skew rolling technology in ball manufacturing industry. Research was carried out so as to find the factors and laws of influencing on skew rolling ball quality. It was found by analyzing the forces exerting on the ball that the deforming velocity of ball had the largest influence on the resistance to deformation. Simulations were done respectively under different roller obliquities, different distances between two guide plates, and different rotation speeds of rollers by means of DEFOR

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23

Rubtsov, V. Yu, K. E. Sokolov, A. A. ,. Skorokhodov, and I. E. Lanovenko. "Development of ball production at EVRAZ NTMK JSC." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 80, no. 2 (2024): 15–24. http://dx.doi.org/10.32339/0135-5910-2024-2-15-24.

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In connection with expansion of mining production, the need for grinding balls. In connection with this, several new ball rolling mills were put into operation, one of which is the 60–120 mill at EVRAZ NTMK, which is currently one of the leading mills in this area. This ball rolling mill only mill where 5 grade large diameter balls are produced (100, 120 mm). The further development of grinding ball production is relevant, both in technology of their production, achieving high quality balls, energy processes efficiency and testing methods. Mill 60–120 has a high level of automation, including

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24

Cojocaru, Denis, Gelu Ianuș, Vlad Cârlescu, Bogdan Chiriac, and Dumitru Olaru. "Friction Torque in Miniature Ball Bearings." Lubricants 13, no. 1 (2025): 12. https://doi.org/10.3390/lubricants13010012.

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The problem of estimation the friction torque in operating miniature ball bearings lubricated with oil or grease is a complex one. Generally, in an angular contact ball bearing (ACBB), various types of losses can appear including losses caused by kinematics in ball-race contacts (rolling, sliding and pivoting), losses between the cage and the balls and between the cage and the guiding race and losses generated by lubricant, especially at high speeds. In the miniature ACBB, the applied loads have generally low values, and some losses can be ignored. In these circumstances, the most important co

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25

Smagala, Arkadiusz, and Krzysztof Kecik. "Nonlinear Dynamics Analysis of a Rolling Bearing." Journal Européen des Systèmes Automatisés 54, no. 1 (2021): 21–26. http://dx.doi.org/10.18280/jesa.540103.

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A numerical analysis of the nonlinear bearing model about two degrees of freedom has been presented in this paper. The contact between a ball and ring by Hertz theory is described. Influence of the number of balls, shaft rotation and clearance on the acceleration were investigated in detail. Three numbers of balls from 11 to 16 were analyzed. The clearance level in the range of 0-71μm has been studied. It has been shown that the acceleration responses are different, depending on the vibration direction and are usually higher when the radial internal clearance and the shaft speed are increased.

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26

Kuleshov, Alexander S., and Alexander A. Shishkov. "Integrability by quadratures of the problem of rolling motion of a heavy homogeneous ball on a surface of revolution of the second order." Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy 11, no. 2 (2024): 347–53. http://dx.doi.org/10.21638/spbu01.2024.208.

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In this paper, we consider the problem of rolling of a heavy homogeneous ball on a perfectly rough surface of revolution. Usually, when considering this problem, it is convenient to specify explicitly the surface along which the center of the ball moves during rolling, instead of the surface along which the ball rolls. The surface on which the center of the ball moves is equidistant to the surface on which the ball is rolling. It is well known, that the considered problem is reduced to the integration the second order linear homogeneous differential equation. In this paper we assume, that the

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27

Klinkov, S. V., V. F. Kosarev, A. E. Chesnokov, A. V. Smirnov, and T. M. Vidyuk. "Investigation of Influence of Input Energy during Ball Milling of Aluminum Powder." Solid State Phenomena 313 (January 2021): 143–51. http://dx.doi.org/10.4028/www.scientific.net/ssp.313.143.

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Influence of the rate at which energy is applied to aluminum powder during its ball milling is investigated. Rolling granulation is a main process due to which treated particles achieve their unique morphology and microstructure. Drastic temperature rise at rapid ball milling leads to increase in plasticity and local melting of treated powder particles that result in their adherence to the surfaces of milling balls and mill cylinder walls. Mass of aluminum powder adhered to the ball surface is proportional to the total surface area of all balls loaded in mill.

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Klinkov, S. V., V. F. Kosarev, A. E. Chesnokov, A. V. Smirnov, and T. M. Vidyuk. "Investigation of Influence of Input Energy during Ball Milling of Aluminum Powder." Solid State Phenomena 313 (January 2021): 143–51. http://dx.doi.org/10.4028/www.scientific.net/ssp.313.143.

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Influence of the rate at which energy is applied to aluminum powder during its ball milling is investigated. Rolling granulation is a main process due to which treated particles achieve their unique morphology and microstructure. Drastic temperature rise at rapid ball milling leads to increase in plasticity and local melting of treated powder particles that result in their adherence to the surfaces of milling balls and mill cylinder walls. Mass of aluminum powder adhered to the ball surface is proportional to the total surface area of all balls loaded in mill.

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29

Riva’i, Muhamad, and Nanda Pranandita. "Analisa Kerusakan Bantalan Bola (Ball Bearing) Berdasarkan Signal Getaran." Manutech : Jurnal Teknologi Manufaktur 10, no. 02 (2019): 41–46. http://dx.doi.org/10.33504/manutech.v10i02.69.

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Measurement of the damage of elements in bearing can be by measuring the vibration generated in the form of a frequency signal when the pad is rotating. Measurement of vibration on the bearing by using vibration measuring instrument. Damage to the rolling bearing includes damage to the cage, outer ring, inner ring and balls. The rolling bearings used in this study are deep groove ball bearing type 6003 RS with internal diameter (d) = 17 mm, outer diameter (D) = 35 mm, bearing thickness (B) = 10, number of rolling elements (Nb) = 10 pieces, and the diameter of the rolling element (Bd) = 4.75 mm

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30

Lovell, M. R., M. M. Khonsari, and R. D. Marangoni. "The Response of Balls Undergoing Oscillatory Motion: Crossing From Boundary to Mixed Lubrication Regimes." Journal of Tribology 115, no. 2 (1993): 261–66. http://dx.doi.org/10.1115/1.2921000.

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There are many applications where determining the response of a slowly oscillating ball bearing becomes crucial. Many instrument pointing mechanisms, in particular those used for aerospace applications, contain ball bearings which sinusoidally oscillate at very slow rates over small angles. Prediction of the frictional response of these bearings is essential to designers, as the friction torque which they develop is an important factor for controlling space instruments. The friction torque associated with the motion of sinusoidally oscillating ball bearings has been found to trace out hysteres

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31

Wardani, Alfida Fitri, Jeckson Siahaan, and Yunita Arian Sani Anwar. "Pengembangan Modul Pembelajaran Berbasis POE (Predict-Observe-Explain) Berbantuan Media Rolling Ball pada Materi Senyawa Hidrokarbon." Chemistry Education Practice 7, no. 1 (2024): 173–79. http://dx.doi.org/10.29303/cep.v7i1.4974.

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Penelitian ini bertujuan untuk mengembangkan modul pembelajaran berbasis POE (Predict-Observe-Explain) berbantuan media rolling ball pada materi senyawa hidrokarbon yang layak dan praktis. Penelitian ini merupakan penelitian pengembangan yang menggunakan model 4D. Hasil analisis data menunjukkan bahwa nilai validitas modul pembelajaran berbasis POE (Predict-Observe-Explain) berbantuan media rolling ball pada materi senyawa hidrokarbon menggunakan indeks aiken sebesar 0,84 dengan kategori sangat layak. Kepraktisan modul pembelajaran berbasis POE (Predict-Observe-Explain) berbantuan media rollin

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32

Ren, Xiao Zhong, Yong Qing Liu, and Yu Rong Jin. "Optimization of Screw Rolling Ball Process Parameters Based on Orthogonal Test." Applied Mechanics and Materials 201-202 (October 2012): 1190–93. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.1190.

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The selection and optimization of screw rolling ball process parameters were analyzed and discussed. The inner stress of ball is the major factor that affects the ball quality during screw rolling of ball. The inner stress is apt to be affected by other related process parameters. In practical, there is no specific measure to determine the parameters. In view of this situation, the influences of roller obliquity, rolling temperature, speed of roller and the outlet distance between guide boards and other parameters on the inner stress of ball were analyzed respectively through orthogonal test.

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33

Riva’i, Muhamad, and Nanda Pranandita. "Analisa Getaran Akibat Kerusakan Deep Grove Ball Bearing Seri 6003RS." Manutech : Jurnal Teknologi Manufaktur 9, no. 02 (2019): 39–43. http://dx.doi.org/10.33504/manutech.v9i02.44.

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Measurement of the damage of elements in bearing can be by measuring the vibration generated in the form of a frequency signal when the pad is rotating. Measurement of vibration on the bearing by using vibration measuring instrument. Damage to the rolling bearing includes damage to the cage, outer ring, inner ring and balls. The rolling bearings used in this study are deep groove ball bearing type 6003 RS with internal diameter (d) = 17 mm, outer diameter (D) = 35 mm, bearing thickness (B) = 10, number of rolling elements (Nb) = 10 pieces, and the diameter of the rolling element (Bd) = 4.75 mm

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34

Kotenok, V. I., S. I. Podobedov, P. N. Tugushev, and S. A. Berestnev. "Creation of ball rolling complexes for production of small diameter grinding bodies." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 76, no. 11 (2020): 1113–18. http://dx.doi.org/10.32339/0135-5910-2020-11-1113-1118.

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Increasing volume of industrial processing of ores with decreased content of extracted elements resulted in a necessity of large volumes of their fine grinding for effective enrichment. Since the fine grinding can be provided only by application of small diameter grinding bodies (balls and cylpebs), a demand sharply arose for grinding bodies of small diameter (less 40 mm). However, the demand turned out to be unsatisfied because of absence of necessary equipment. To solve the problem, the All-Russian research, development and designing Institute of metallurgical machine building after academic

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35

Liu, Yongzhen, and Yimin Zhang. "A research on the time-varying stiffness of the ball bearing considering the time-varying number of laden balls and load distribution." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 12 (2018): 4381–96. http://dx.doi.org/10.1177/0954406218811869.

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In response to the fact that not all rolling balls are laden when the angular contact ball bearing working under the condition with certain combined loads especially when the axial preload is not large enough, an analytical method for the determination of the time-varying stiffness of angular contact ball bearing considering the effect of time-varying number of laden balls and load distribution is proposed in this paper. According to the definition of the stiffness, the time-varying stiffness under different sets of combined loads is obtained by the implicit function derivation method. Only th

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36

Gray, Jean. "Keep the pay ball rolling." Nursing Standard 18, no. 10 (2003): 3. http://dx.doi.org/10.7748/ns.18.10.3.s1.

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37

Cantrill, Dante, and Anthony Powell. "To Keep the Ball Rolling." Rocky Mountain Review of Language and Literature 39, no. 2 (1985): 157. http://dx.doi.org/10.2307/1347339.

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Bokor, Nándor. "A rolling ball magic trick." Physics Education 54, no. 1 (2018): 015011. http://dx.doi.org/10.1088/1361-6552/aaea0d.

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39

Liang, Hung–Hua, Po–Li Wei, and Ming–Te Huang. "“Rolling Ball” in the Abdomen." Gastroenterology 140, no. 3 (2011): e9-e10. http://dx.doi.org/10.1053/j.gastro.2010.03.060.

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Pater, Zbigniew, Janusz Tomczak, Łukasz Wójcik, and Tomasz Bulzak. "Physical Modelling of the Ball-Rolling Processes." Metals 9, no. 1 (2019): 35. http://dx.doi.org/10.3390/met9010035.

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The objective of the article was to present the state of the problem of physical modelling of the hot-working processes with plasticine as the model material. It was stated that the aforementioned method can prove helpful in analyzing complex plastic forming processes such as cross rolling and helical rolling of balls. In order to confirm this hypothesis, an attempt at forming steel balls with diameters of 40 mm (cross rolling) and 57 mm (helical rolling) under laboratory conditions was made. Further on, these processes were conducted in model form using special model rolling mills and 3D prin

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41

Zhou, Jing Ling, Wei Ming Zuo, Xiao Yang Chen, and Guo Qing Wu. "Experimental Study of Rolling Contact Fatigue Life of Zirconia Ceramic Ball." Advanced Materials Research 152-153 (October 2010): 1272–75. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1272.

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A newly developed pure rolling fatigue test rig with three contact points for bearing balls was used to perform rolling contact fatigue (RCF) tests and the fatigue properties of two kinds of zirconia ceramic balls produced with different materials composition and identical technologies were compared. Ball surfaces were examined after failure with optical microscopy and scanning electron microscopy. It was identified by tests that the failure mode of zirconia ceramic balls was surface spall. Life tests data, summarized in accordance with the Weibull theory, showed that the life of two kinds of

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42

Bogdevičius, Marijonas, and Viktor Skrickij. "Investigation of Dynamic Processes in Ball Bearings with Defects." Solid State Phenomena 198 (March 2013): 651–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.651.

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The paper considers the dynamics of ball bearings with defects. A mathematical model of a ball bearing with defects is offered. The performed theoretical and experimental investigations of ball bearings with defects are described. Five cases of various defects are investigated, including the defective outer race, the defective inner race, the defective rolling element, the defective inner and outer races, the rolling element and a separator, the worn-out ball bearing.

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43

Ene, Gheorghe, and Iuliana-Marlena Prodea. "Calculus of the Required Driving Power for Tube Ball Mills." Revista de Chimie 59, no. 1 (2008): 106–12. http://dx.doi.org/10.37358/rc.08.1.1717.

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This paper presents the determining of the necessary driving power for tube ball mills, regarding frequently used working conditions: by rolling balls and by falling down balls, on parabolic trajectory. To make easier the calculation of driving power, the established correlations where used in Blanc formula.

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44

Zhang, Jingwei, Yanling Zhao, and Xiaonan Zhang. "Stability investigations of cageless ball bearings considering balls and outer rings with variable diameter raceways." Advances in Mechanical Engineering 14, no. 11 (2022): 168781322211356. http://dx.doi.org/10.1177/16878132221135685.

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The reducer raceway in the inner raceway of the outer ring of the cageless bearing can effectively make the rolling automatically discrete; nevertheless, it is unclear how this impacts the rolling. This work examines the influence of three types of reducer raceway structure form and prevent position on the mutual discrete stability of rolling bodies using numerical simulation and experiment. By analyzing the phase diagrams of rolling body velocity-displacement and inner ring velocity-displacement, it is discovered that the bearing area increases the stability of a single elliptical or shuttle-

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45

Nélias, D., and T. Yoshioka. "Location of an acoustic emission source in a radially loaded deep groove ball-bearing." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 212, no. 1 (1998): 33–45. http://dx.doi.org/10.1243/1350650981541877.

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This paper describes a deep groove ball-bearing analysis which has been developed to simulate acoustic emission occurring during ball-bearing operation. The computer simulation is useful to clarify experimental research on rolling contact fatigue initiation using the acoustic emission technique. Results show the ability of the method to detect and to locate a subsurface defect, due to rolling contact fatigue, before the rolling bearing failure occurs. The subsurface defect can be accurately located within the inner ring of a deep groove ball-bearing operating under radial load.

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Hierrezuelo, J., and C. Carnero. "Sliding and rolling: the physics of a rolling ball." Physics Education 30, no. 3 (1995): 177–82. http://dx.doi.org/10.1088/0031-9120/30/3/009.

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Karaszewski, Waldemar. "Crack Propagation in Zirconia MgO-PSZ Ceramic Material." Key Engineering Materials 490 (September 2011): 54–63. http://dx.doi.org/10.4028/www.scientific.net/kem.490.54.

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The properties of ceramic materials such as elevated hardness, high temperature capability, low coefficient of thermal expansion are of interest for rolling element materials. Widely used ceramic materials in engineering applications are silicon nitride, zirconia and alumina. The paper presents an experimental study of the fatigue life of MgO-PSZ ceramic material in lubricated contact with defined types of cracks. A ceramic angular contact bearing operation was simulated using a four-ball machine. Zirconia balls were artificially damaged with pre-cracks. Ringformed pre-cracks were propagated o

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Nagarajan, Balasubramanian, and Sylvie Castagne. "Microstructure Study of Nickel-Based Superalloys after Deep Cold Rolling." Materials Science Forum 879 (November 2016): 169–74. http://dx.doi.org/10.4028/www.scientific.net/msf.879.169.

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Mechanical surface treatments are conducted on aerospace components in order to improve their fatigue life through inducing compressive residual stresses, cold work and smoother surface finish. The microstructures of the component surface and subsurface after treatment influence the crack nucleation and crack propagation significantly. This paper studies the effect of Deep Cold Rolling (DCR), a subsurface process using hydrostatically controlled balls, on the resulting microstructure of RR1000, a nickel-based superalloy used in high temperature aerospace applications. In this study, DCR of RR1

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Hu, Rui, Zuo Min Liu, and Chun Xia Xu. "The Effects of Young’s Modulus of Materials on the Rolling Resistance Characteristics of Ball Bearing." Applied Mechanics and Materials 44-47 (December 2010): 2307–11. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2307.

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The effects of Young’s modulus of materials on the rolling resistance characteristics of ball bearing have been investigated by experimental,analytical and numerical method. Results show that the Young’s modulus of ball bearing greatly affects its rolling resistance characteristics and the characteristic values of the rolling resistance characteristics will decrease with the increase of the Young’s modulus of ball bearing, for example, the elastic power consumption of the ZrO2 bearing is about 80 percent of the GCr15 bearing, and that the effects mainly reflects on three aspects: the elastic h

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Georgeson, J. D., and D. K. Lieu. "Inspection of Roller Bearing Surfaces with Laser Doppler Vibrometry." Journal of Engineering for Industry 114, no. 1 (1992): 123–25. http://dx.doi.org/10.1115/1.2899750.

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Laser Doppler Vibrometry is presented as an effective method of measuring surface profiles of rolling contact bearing balls. An experimental setup and signal processing algorithm are used to obtain digitized surface profiles and statistical measurements of ball surfaces. Tests are made on two different grades of high precision balls and the results are compared. Measurements are presented that match lobed ball frequency results with a resolution of 0.025 microns. The method is well suited for a manufacturing environment because of its durability, simplicity, and high speed.

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