Journal articles: 'Design, roller gear'

1

Tsay, D. M., N. J. Huang, and B. J. Lin. "Geometric Design of Roller Gear Cam Reducers." Journal of Mechanical Design 121, no. 1 (March 1, 1999): 172–75. http://dx.doi.org/10.1115/1.2829420.

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A roller gear cam. reducer, composed of a turret with rollers and a globoidal cam, is often used to provide high positioning precision at low cost. In this study, a simple procedure is given to generate the surface of the cam without solving any contact equations. The method is based on rigid body transformations between the cam and the turret roller. Analyses of the pressure angle and the principal curvature of the surface geometry are also accomplished. In addition, contact forces between the roller and cam, input torque, and the reducer efficiency are evaluated. An example of the procedure is given.

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Kwon, Soon-Man. "Roller Track Gear System Design based on Roller Gear Mechanism." Journal of manufacturing engineering & technology 23, no. 2 (April 15, 2014): 194–98. http://dx.doi.org/10.7735/ksmte.2014.23.2.194.

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3

Lisowski, Filip, and Jan Ryś. "A Methodology of Designing the Teeth Conjugation in a Planetary Roller Screw." Archive of Mechanical Engineering 63, no. 4 (December 1, 2016): 589–603. http://dx.doi.org/10.1515/meceng-2016-0033.

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Abstract The paper presents the methodology for designing the teeth conjunction of planetary gears in the planetary roller screw mechanism. A function of the planetary gears is to synchronize an operation of rollers in order to avoid axial displacements. A condition of the correct operation is no axial movement of rollers in relation to the nut. The planetary gears are integral parts of rollers and therefore an operation of the gear transmissions has a direct impact on cooperation of the screw, rollers and the nut. The proper design of gear engagements is essential for reducing slippage on surfaces of the cooperating threaded elements. For this purpose, in a designing method, both the limitations of operation and kinematic conditions of rollers’ operation have to be taken into account.

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Bai, S., and J. Angeles. "The design of spherical multilobe-cam mechanisms." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 2 (February 1, 2009): 473–82. http://dx.doi.org/10.1243/09544062jmes1154.

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Cam—roller mechanisms can be used in transmissions and robotic devices as an alternative to their bevel-gear counterparts. As bevel gears are used to couple shafts of intersecting axes, their cam-mechanism replacements are bound to have intersecting axes as well. This means that the contact surface of the cam must be conical, which leads to spherical cam mechanisms. Compared with gear transmissions, cam—roller mechanisms feature low friction, low backlash, and high strength. However, cam mechanisms may end up with a high pressure angle if negative action, a motion in which the cam is driven by mechanism rollers, occurs. This article reports the design of transmissions with spherical multilobe cams (MLCs), as a means to reduce the pressure angle. The kinematics of MLC, including profile generation, undercutting-avoidance, and transmission-quality evaluation, is studied here. A case study has been included, in which the synthesis of a spherical MLC transmission is undertaken as a means to improve the transmission quality of a spherical epicyclic gear train. This train was introduced with the purpose of producing a singularity-free, unlimited-workspace pitch—roll wrist.

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Hong-Sen, Yan, and Chen Hsin-Hung. "Geometry design of roller gear cams with hyperboloid rollers." Mathematical and Computer Modelling 22, no. 8 (October 1995): 107–17. http://dx.doi.org/10.1016/0895-7177(95)00160-4.

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SHEU, Kuen-Bao, and Ta-Shi LAI. "KINEMATIC ANALYSIS OF ROLLER DRIVES." Transactions of the Canadian Society for Mechanical Engineering 27, no. 4 (December 2004): 401–15. http://dx.doi.org/10.1139/tcsme-2003-0023.

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The roller drive is an epicyclic gearing that consists of both the planet gear and the annular sun gear with rollers as its teeth. The roller drive thus has the advantages of easy manufacturing and low cost, and also has attractive attributes including high speed reduction ratio, compact size, and light weight as an epicyclic gearing. In this paper, a mathematical modeling for the kinematic analysis based on the vector loop approach is developed. The position, velocity, and acceleration analyses for the roller drive are performed. Furthermore, an experimental test verifying the analysis results is achieved. The analysis results show that only a single pair of teeth is meshed during gearing. It also shows that the values of gear ratio are inherently fluctuated corresponding with the number of ring gear rollers. This undesirable fluctuation can be minimized if the selected values of the design parameters satisfy a specific four-linkage constraint.

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Dai, Zih-Chun. "Stresses Analysis of Roller Gear Drive." Journal of Physics: Conference Series 2141, no. 1 (December 1, 2021): 012001. http://dx.doi.org/10.1088/1742-6596/2141/1/012001.

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Abstract The roller worm gear drives have been widely adopted in numerous industrial applications such as robot joint reducer, heavy-duty production line. This study is to improve the performance of a roller gear drive by utilizing an iterative optimization scheme to improve the tooth profile of the hourglass worm gear in the roller gear drive. Dedicated design of the variable-pitch slot on the hourglass worm gear can remedy the power efficiency of the roller gear drive by enhancing the contact ratio dramatically. This research showed that the roller gear drive is a better mechanism for the high reduction ratio reducers. The CAD design and performance analysis of a roller gear drive by SolidWorks have provided the engineers an optimizing methodology.

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Wu, Tao, Guangchun Wang, Jin Li, and Ke Yan. "Investigation on gear rolling process using conical gear rollers and design method of the conical gear roller." Journal of Materials Processing Technology 259 (September 2018): 141–49. http://dx.doi.org/10.1016/j.jmatprotec.2018.04.034.

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Yan, Hong-Sen, and Hsin-Hung Chen. "Geometry design and machining of roller gear cams with cylindrical rollers." Mechanism and Machine Theory 29, no. 6 (August 1994): 803–12. http://dx.doi.org/10.1016/0094-114x(94)90079-5.

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10

Gong, Qing Shan, Yue Min Wu, Shan Shan Liu, and Hong Xun Zhou. "Parametric Design and Kinematics Simulation of the Roller Gear Indexing Cam Mechanism." Applied Mechanics and Materials 722 (December 2014): 112–15. http://dx.doi.org/10.4028/www.scientific.net/amm.722.112.

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The working profile of the roller gear indexing cam is sophisticated space curved surface. It is difficult to get the 3D model with conventional cartography. In this paper, a parameter molding method of the roller gear indexing cam based on VB and UG is provided. A system is compiled.The Simulation and Kinematics Analysis of the roller gear indexing cam mechanism can be done after the parameters are completely set. It hopes that the flaw and other problem in design can be found though this simulation and kinematics analysis, which is facilitate the designer to improve the design in time.

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11

Yan, Hong-Sen, and Hsin-Hung Chen. "Geometry Design of Globoidal Cams With Generalized Meshing Turret-Rollers." Journal of Mechanical Design 118, no. 2 (June 1, 1996): 243–49. http://dx.doi.org/10.1115/1.2826876.

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This paper derives the generalized surface equation for cylindrical, conical, and hyperbolic meshing turret-rollers. Based on the generalized equation of meshing turret-rollers, generalized mathematical expressions of surface geometry for globoidal cams with cylindrical, conical, and hyperbolic meshing turret-rollers are derived using theory of conjugate surfaces, differential geometry, and coordinate transformation. A design example is presented for demonstrating procedures of surface generating of the globoidal cam. The result of this work is necessary for the computer-aided design and manufacturing of roller gear cams for industrial applications.

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12

Lustenkova, E. S. "PROCEDURE FOR CALCULATION AND DESIGN OF SPHERICAL ROLLER GEARS WITH DOUBLE-ROW PINION." Mechanics of Machines, Mechanisms and Materials 2, no. 55 (June 2021): 18–24. http://dx.doi.org/10.46864/1995-0470-2021-2-55-18-24.

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The article presents a method for calculating and designing spherical roller gears with a double-row pinion. The studied gears are analogs of planetary gears with a double-wheel pinion. They make it possible to implement a wide range of gear ratios. The advantages of spherical roller gears include small dimensions, low material consumption, and layout properties. A special feature of the proposed calculation algorithm is the search for optimal geometric gears parameters according to the criteria of maximum efficiency coefficient taking into account maximum load capacity for a given maximum radial dimensions. The main criterion of strength is fatigue endurance. The method includes design and verification calculations. It makes it possible to develop the small-sized speed reducers for low-speed drives for various purposes.

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13

Hernandez, S., S. Bai, and J. Angeles. "The Design of a Chain of Spherical Stephenson Mechanisms for a Gearless Robotic Pitch-Roll Wrist." Journal of Mechanical Design 128, no. 2 (June 6, 2005): 422–29. http://dx.doi.org/10.1115/1.2167653.

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Although bevel-gear robotic wrists are widely used in industrial manipulators due to their simple kinematics and low manufacturing cost, their gear trains function under rolling and sliding, the latter bringing about noise and vibration. Sliding is inherent to the straight teeth of the bevel gears of these trains. Moreover, unavoidable backlash introduces unmodeled dynamics, which mars robot performance. To alleviate these drawbacks, a gearless pitch-roll wrist is currently under development for low backlash and high stiffness. The wrist consists of spherical cam-rollers and spherical Stephenson linkages, besides two roller-carrying disks that drive a combination of cams and Stephenson mechanisms, the whole system rotating as a differential mechanism. The paper focuses on the design of the chain of spherical Stephenson mechanisms. The problem of the dimensional synthesis is addressed, and interference avoidance is discussed. An embodiment of the concept is also included.

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14

Belousov, Yuri V. "Method for determining the optimal parameters of the chain transmission, taking into account the design of the drive chain." RUDN Journal of Engineering Researches 22, no. 1 (August 27, 2021): 72–83. http://dx.doi.org/10.22363/2312-8143-2021-22-1-72-83.

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Goal . Develop the design of the drive plate chain and methods for determining the optimal parameters of the chain transmission. Methods. Analysis of the designs of standard drive bushing and roller chains, as well as the drive plate chain with internal engagement. Determination of ways to increase the durability of these chains and chain gears from the condition of ensuring the wear resistance of their hinges and increasing their technical and economic indicators. Results . The analysis of designs of standard drive bushing-roller chains and drive plate chains with internal gearing is performed. A promising design of the drive plate chain has been developed. The optimization of transmission parameters, both with standard chains, and with the chain proposed by the authors, providing an increase in their durability and efficiency. In this regard, a method has been developed for determining the greatest elongation of standard chain links, as well as the chain developed by the authors, from the condition of wear resistance of their hinges. A method for determining the optimal transmission ratio of these chain gears has also been developed. It is established that the gear ratio of the transmission with the drive plate chain developed by the authors is determined primarily by the accuracy of manufacturing its hinges. With sufficiently precise manufacturing of chain hinge parts, the gear ratio can be significantly increased, up to u=10 and higher. This will allow you to use gears equipped with this chain in drives with a large gear ratio.

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15

Liu, Yan Song, and Wei He. "The Study on Dynamic Simulation of the Roller Gear Indexing Cam." Advanced Materials Research 503-504 (April 2012): 44–47. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.44.

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The roller gear indexing cam has irreplaceable superiority in the high-accuracy and high-speed indexing motion, but it can not keep the system’s good dynamic characteristics to improve machining accuracy of cam only. This paper studies the dynamic simulation of the roller gear indexing cam by means of virtual prototype technology, rigid multi-body dynamics, and contact mechanics, and the influences of this system’s parameters on dynamic responds of the mechanism. These works are valuable for designers, makers and users to optimal design, test, and make the mechanism, and give a new method for studying dynamics of roller gear indexing cam.

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Zhou, Yi Qi, Wei Xiao Tang, H. Zhang, and B. C. Shi. "Web Based Virtual Design of Dynamics of Roller Gear Cam System." Materials Science Forum 471-472 (December 2004): 677–81. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.677.

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The remote virtual design system based on B/S framework is investigated in the paper. On reviewing the current virtual design system situation, the control system dynamics simulation is integrated into the virtual design system of roller gear cam mechanism. Simulink and Matlabserver are employed to realize the dynamics simulation for the system, and COM and VRML technologies are used to browse the virtual model on the network platform. The prototype system indicates that the system can serve as an effective tool for designing roller gear cam mechanism with the better properties of interactive dynamics performance design and expansion usage.

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17

Jang, Si Youl, and Wan Choi. "A Study on the Contact Behaviors of Infinitely Variable Transmission System with Full Toroidal Shapes of Disks." Key Engineering Materials 297-300 (November 2005): 351–56. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.351.

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The torque of the continuously variable transmission system with friction drive mechanism is transmitted by contacting roller with input and output disks. For the higher transmitted torque, it is necessary to apply large load in order to get higher friction force, which in turn generates severe high stress on the contact surfaces of roller and disks. The toroidal type CVT system has simple component arrays that have three contact points between roller and each input or output disk to get the torque transmitted. However, compact assembly design of the three sets of rollers contacting with input and output disks needs the roller to stay with unsymmetrical angled position with each other. Therefore, the contact shapes between roller and disk vary according to the transmission ratio and should be investigated to avoid the excessive contact stress over than ~1.8 GPa. In this study, the contact geometries of roller and disks in the toroidal type CVT system are computed during the gear ratios. The contact area of which the size depends on the material elasticity, curvatures of roller and disk, and applied load are all of elliptic shapes because of the convex and concave curvatures of roller and disk shapes, respectively. From the computed results considering the size of roller diameter, roller stroke and applied load, it is found that the shapes of contact area changes the sizes of major and minor elliptical diameters in the rolling direction during the gear ratios due to the unsymmetrical angled position of roller.

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18

Yu, Ke Qiang. "The Designment of Double-Roll Cake Breaker." Advanced Materials Research 734-737 (August 2013): 2694–98. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.2694.

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This paper combined the actual situation of crushed soybean processing, for the The double-roll cake breaker and structural design of the shafts, gears, gear plate and flexible institutions were discussed and final using UG software animation simulation,Provides a theoretical foundation for the future research for efficient processing of soybean cake breaker. Key words: double-roller, cake breaker,design.

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Wu, Linping, Shangjun Ma, Qi Wan, and Geng Liu. "Dynamic Model of Planetary Roller Screw Mechanism with Considering Torsional Degree of Freedom." MATEC Web of Conferences 306 (2020): 01003. http://dx.doi.org/10.1051/matecconf/202030601003.

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To predict accurately the dynamics performance of planetary roller screw mechanism, it is necessary to establish its streamline and engineering-compliant dynamic model, which is the basis of mechanical design and precision control of the system. In this paper, the relative displacement between roller and ring gear along the line of action is deduced and the relationship between nature frequencies and the number of rollers is discussed. Considering the torsional stiffness of all components and the thread mesh stiffness based on the Hertzian contact theory, the purely torsional model for planetary roller screw mechanism is presented to reveal the natural frequencies and vibration mode characteristics of the system. The results show that the natural properties of undamped system in planetary roller screw mechanism are mainly reflected by two typical vibration modes: rotational mode and roller mode.

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20

Alamsah, Safingi, Yaser Krisnafi, Arif Baswantara, Berbudi Wibowo, and Regil Kentaurus Harryes. "The MEKANISASI BAGAN TANCAP MENGGUNAKAN ROLLER PENGANGKAT JARING DI PANGANDARAN, JAWA BARAT." Marine Fisheries : Journal of Marine Fisheries Technology and Management 12, no. 2 (March 11, 2022): 195–205. http://dx.doi.org/10.29244/jmf.v12i2.33567.

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Pangandaran is located in the southern coast of the Java Island. Some of Pangandaran fishers operate lift net (bagan) to catch fish and shrimp. During hauling process, the net is lifted manually using a roller that potentially harm the fishers. The purpose of this study was to design a mechanical roller that applicable for lift net. The analysis of design requirement, such as calculation of torque, horse power, and reduction power with gear mechanism for operating the roller were applied in this research. The results showed that the net lifting operation required 4.8 HP or 3.6 KW of diesel engine to power a hydraulic pump. For the maximum load, when the net is fully loaded with fish, the operation required 67.91 HP or 50.64 KW. It means power from the diesel motor was not enough to support at maximum load. Therefore, a gear mechanism with a ratio of 1:14 was applied. However, this method reduces the angular speed of the gear which leads to reduction on net pulling speed. Keywords: Lift net, hydraulic, horse power, power, and lifnet roller

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21

Lo, Jie-Shing, Ching-Haun Tseng, and Chung-Biau Tsay. "NON-UNDERCUTTING CONDITIONS OF ROLLER GEAR CAMS." Transactions of the Canadian Society for Mechanical Engineering 26, no. 4 (December 2003): 413–34. http://dx.doi.org/10.1139/tcsme-2002-0025.

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The undercutting conditions in a planar cam can be predicted by comparing the radius of the curvatures of the pitch curves with the radius of the cutter. For the complexity of the spatial cam generation, the principle radius of the curvatures and the directions of the generated cam surface are different from point to point along the pitch curve so that predicting the undercutting condition becomes very difficult. The undercutting conditions on the roller gear cams use the concept of limiting conjugate motion generation. In this study, the feasible design region without undercutting is presented. The investigation results are very useful to the designer and the manufacturing engineer for understanding the undercutting characteristics of the roller gear cam.

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Chang, De Gong, R. Zong, and Cong Feng An. "Dynamics Simulation Analysis of Roller Gear Indexing Cam Mechanism with Friction Gap." Advanced Materials Research 426 (January 2012): 213–17. http://dx.doi.org/10.4028/www.scientific.net/amr.426.213.

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Based on multi-body dynamics theory, this paper uses ADAMS to carry on the dynamic simulation for assembly model of roller gear indexing cam mechanism in the case of frictionless and consideration of friction gap, detailed analysis of the gap generated by friction has influence on contact transmission of cam mechanism, and obtained the movement rule curves of angular velocity and angular acceleration and some valuable conclusions. It provided theoretical basis and reference for the subsequent design and research of roller gear indexing cam mechanism.

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Soong, Ren-Chung. "A CAM-GEARED MECHANISM FOR RIGID BODY GUIDANCE." Transactions of the Canadian Society for Mechanical Engineering 41, no. 1 (March 2017): 143–57. http://dx.doi.org/10.1139/tcsme-2017-1010.

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A cam-geared mechanism, consisting of a disk cam with a radially translating roller follower, a disk cam with an oscillating roller follower and an elementary planetary gear train is proposed for rigid body guidance. A design method of cam profile based on inverse kinematic analysis was also proposed. An example is provided to show the feasibility and effectiveness of this proposed method. The advantages of the new design include its simple, compact structure and simple design procedure.

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Panmiya, Navinbhai D., and Prof C. V. Patel. "Design and Development of Hub-less Wheel." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 147–49. http://dx.doi.org/10.22214/ijraset.2022.41832.

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Abstract: The present invention is related to a cycle or an engine-driven vehicle that moves on a bearing surface and more particularly on a road. In the case of a motorcycle, the front steering wheel is fitted with a first crown-shaped roller bearing being comprised of an outer annular element that supports the rim and an interior annular element that is connected to an arm. The carries at its front end a second crown-shaped roller bearing of which the interior elements are made integral by way of a lug of the interior annual element of the roller bearing and of which the interior annular elements of bearing is made integral with the arms device allow transmitting the steering force at a point located as close as possible to the contact area between the rim and the road. In addition to that, the vehicle device becomes more compact. due to hub mass, it is difficult in comparison to without hub, which can be easily steered in manual, The power is transmitted with the aid of gear Drive mechanism which is more efficient that the chain mechanism. Keywords: Hub-lees Wheel, Rim, Tire, Try Wheel, Roller

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Wu, Tao, Guangchun Wang, Jin Li, and Ke Yan. "Structure design and effects of conical gear roller on restraining rabbit ear defects during gear rolling." International Journal of Advanced Manufacturing Technology 103, no. 1-4 (April 27, 2019): 1621–31. http://dx.doi.org/10.1007/s00170-019-03730-1.

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Gao, Chang Yin, and Wan Quan Li. "Design of the Pinch Machine for Battery Grid Continuous Casting Machine Based on Link and Floating Gear Mechanism." Key Engineering Materials 474-476 (April 2011): 2258–62. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.2258.

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In order to realize pinch during the production of the continuous casting battery grid, using the link and floating mechanism a pinch machine is designed which can automatically adjust the roll gap and pinch tension. First the structure of the grid pinch machine is introduced ,in which adopts the dual drive roller to achieve the upper and lower pinch roll and pinch roll to rotate in accordance with the same speed, but in the opposite direction. The pinch force generates by the fiction force between the grid plate and the upper and lower pinch roller. By means of the shifting bearing and spring the position of the upper pinch roller is controlled and the roll gap adjustment mechanism adopts the link and floating gear mechanism which results in structure simplification , high reliability, Low cost, stable, long life and low noise. Finally, according to the design principle of the pinch machine, using the theoretical mechanics and the Euler formula the pinch roller tension, tension roller tension and pinch pressure are calculated. The pinch machine has made it possible to achieve the manufacturing system of continuous casting battery grid.

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Sin, Jung-Ho, Dong-U. Gang, and Ho-Eop Yun. "A Study on Shape Design of Cylindrical Cam with Rotating Roller Follower in Roller-Gear-Cam Mechanism." Transactions of the Korean Society of Mechanical Engineers A 26, no. 8 (August 1, 2002): 1527–33. http://dx.doi.org/10.3795/ksme-a.2002.26.8.1527.

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Cheng, Xiu Quan, Ling Yan Sun, and Qin Xiang Xia. "Processing Parameters Optimization for Stagger Spinning of Trapezoidal Inner Gear." Advanced Materials Research 189-193 (February 2011): 2754–58. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2754.

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Spin-forming of trapezoidal inner gear is a new technology of the near-net forming in gear manufacturing field. Processing parameters, such as the initial thickness of blank and radial reductions of each roller, greatly influence the forming quality of spun part. The forming quality of trapezoidal inner gear involves the filling status of gear tooth and dimensional accuracy of root circle. An approach for processing parameter optimization of the forming quality of the trapezoidal inner gear stagger spinning is proposed. The proposed approach integrates the orthogonal experiment design, gray relational analysis, and analysis of variance (ANOVA). The experiment result indicates that the proposed approach is effective in determining the optimized processing parameters for the stagger spinning of trapezoidal inner gear.

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Wu, Jun Fei, Xin Zhou, and Hao Zhang. "The FEA of New Type Roller Movable Teeth Reducer." Applied Mechanics and Materials 152-154 (January 2012): 603–8. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.603.

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The structure and operating principle of rolling movable teeth reducer are introduced in this paper. The model of roller movable teeth reducer is established by Pro/E software , and the statics and modal analysis is made by ANSYS[1 2] software. The simulation results show that the loaded components of roller movable teeth reducer tallies with the theoretical computation and verify the mechanical characteristics of virtual prototype. Through modal analysis of Roller movable teeth reducer transmission Parts, such as the center wheel, roller movable teeth, the shock wave, and retainer, the vibration characteristics frequency of the roller gear reducer is obtained. This can avoid the working band of large deformation of bending and torsion It provides a basis for the optimization design and engineering analysis of reducer[2].

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Gonza´lez-Palacios, M. A., and J. Angeles. "The Design of a Novel Mechanical Transmission for Speed Reduction." Journal of Mechanical Design 121, no. 4 (December 1, 1999): 538–43. http://dx.doi.org/10.1115/1.2829495.

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The design of a novel transmission for speed reduction is reported in this paper. The transmission is based on the layout of pure-rolling indexing cam mechanisms, for it is intended to eliminate backlash and friction, which are the main drawbacks of gear transmissions. The design relies on a unified methodology for indexing cam mechanisms, whereby the same procedure is used to design planar, spherical, and spatial mechanisms. Two versions of the speed reducer, that we term Speed-o-Cam, are described here, namely, planar, to couple shafts of parallel axes, and spherical, to couple shafts of intersecting axes. By means of a cascade of two planar versions of Speed-o-Cam, moreover, coaxial shafts can be coupled. Moreover, contrary to other alternatives to gear transmissions, such as harmonic drives or epicyclic transmissions, Speed-o-Cam caters to shafts with either parallel or intersecting axes; in the latter case, moreover, the angle at which the axes intersect can vary from 0° to 180° continuously. The design with shaft axes at 0° leads to an internal cam, i.e., one with its axis external to the axes of the follower and the roller in contact; for shaft axes at 180°, the design leads to an external cam, i.e., one with its axis lying between those of the follower and the roller in contact.

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Wang, Wu Guang. "Reliability and Efficiency Calculation for Drive System of Multi-Bush Roller Ironing Machine." Applied Mechanics and Materials 741 (March 2015): 541–45. http://dx.doi.org/10.4028/www.scientific.net/amm.741.541.

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In this paper, formula for calculating the reliability of single-chain drive system and formula for calculating the reliability and efficiency of drive system of multi-roller ironing machine are presented based on reliability design theory and the theory of mechanical efficiency calculation. The results illustrate that the reliability and efficiency of existing drive system are lower. Therefore, improvement measures are proposed: use high-quality bush roller chain that shall be regularly maintained and changed; the chain drive shall be replaced with gear drive.

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Grujicic, M., V. Chenna, R. Galgalikar, J. S. Snipes, S. Ramaswami, and R. Yavari. "Computational analysis of gear-box roller-bearing white-etch cracking." International Journal of Structural Integrity 5, no. 4 (November 11, 2014): 290–327. http://dx.doi.org/10.1108/ijsi-10-2013-0028.

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Purpose – A simple economic analysis has revealed that in order for wind energy to be a viable alternative, wind-turbines (convertors of wind energy into electrical energy) must be able to operate for at least 20 years, with only regular maintenance. However, wind-turbines built nowadays do not generally possess this level of reliability and durability. Specifically, due to the malfunction and failure of drive-trains/gear-boxes, many wind-turbines require major repairs after only three to five years in service. The paper aims to discuss these issues. Design/methodology/approach – The subject of the present work is the so-called white etch cracking, one of the key processes responsible for the premature failure of gear-box roller-bearings. To address this problem, a multi-physics computational methodology is developed and used to analyze the problem of wind-turbine gear-box roller-bearing premature-failure. The main components of the proposed methodology include the analyses of: first, hydrogen dissolution and the accompanying grain-boundary embrittlement phenomena; second, hydrogen diffusion from the crack-wake into the adjacent unfractured material; third, the inter-granular fracture processes; and fourth, the kinematic and structural response of the bearing under service-loading conditions. Findings – The results obtained clearly revealed the operation of the white-etch cracking phenomenon in wind-turbine gear-box roller-bearings and its dependence on the attendant loading and environmental conditions. Originality/value – The present work attempts to make a contribution to the resolution of an important problem related to premature-failure and inferior reliability of wind-turbine gearboxes.

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Li, Jia Qing, and Dong Xie. "Study on Adhesion Property in the Process of Vibrating Compaction." Applied Mechanics and Materials 577 (July 2014): 178–81. http://dx.doi.org/10.4028/www.scientific.net/amm.577.178.

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In order to be convenient for engineering calculations, the relative experiment was designed after analyzing the reasons why the adhesion force on the front wheel of the single vibratory road roller changes in the process of vibratory compaction. According to the result of the experiment, a concept of effective adhesion coefficient is put forward and a calculation method of it is provided. Draw a conclusion that the utilization rate of adhesion coefficient is highest in two gear and hope that it has a positive effect on the parameter design of vibratory roller and engineering applications.

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Lin, Psang Dain, and Ming Far Lee. "Applications of D-H Notation in Machining and On-Line Measurement of Roller-Gear Cams on 5-Axis Machine Tools." Journal of Manufacturing Science and Engineering 119, no. 3 (August 1, 1997): 393–401. http://dx.doi.org/10.1115/1.2831119.

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A kinematic model is presented to aid in the design of cam-profiles and determine the NC data equations using Denavit-Hartenberg (D-H) notation to produce and to measure the dimension accuracy of roller-gear cams on 5-axis machine tools. First, cam profiles are determined based on the conjugate surface theory. Then, D-H notation is employed in the derivation of machine tool ability functions and in the generation of the desired cutter/measuring-probe location matrices. The desired NC data equations are obtained by solving the link variables of the machine tool by equating the machine tool ability function with the tool location matrices. The resultant cutting speed and material-removal rate during machining are also investigated. To verify the validity of this methodology, a designed roller-gear cam was machined and its surfaces were measured through the on-line measurement system equipped with a touch-trigger probe on a 5-axis machine tool. This methodology combines the cam design, machining, and measurement techniques, thus making the production process more flexible, automatic, and controllable.

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Grujicic, M., V. Chenna, R. Yavari, R. Galgalikar, J. S. Snipes, and S. Ramaswami. "Multi-length scale computational analysis of roller-bearing premature failure in horizontal-axis wind turbine gear boxes." International Journal of Structural Integrity 6, no. 1 (February 2, 2015): 40–72. http://dx.doi.org/10.1108/ijsi-04-2014-0016.

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Purpose – To make wind energy (one of the alternative-energy production technologies) economical, wind-turbines (convertors of wind energy into electrical energy) are required to operate, with only regular maintenance, for at least 20 years. However, some key wind-turbine components (especially the gear-box) often require significant repair or replacement after only three to five years in service. This causes an increase in both the wind-energy cost and the cost of ownership of the wind turbine. The paper aims to discuss these issues. Design/methodology/approach – To overcome this problem, root causes of the gear-box premature failure are currently being investigated using mainly laboratory and field-test experimental approaches. As demonstrated in many industrial sectors (e.g. automotive, aerospace, etc.) advanced computational engineering methods and tools cannot only complement these experimental approaches but also provide additional insight into the problem at hand (and do so with a substantially shorter turn-around time). The present work demonstrates the use of a multi-length-scale computational approach which couples large-scale wind/rotor interactions with a gear-box dynamic response, enabling accurate determination of kinematics and kinetics within the gear-box bearings (the components most often responsible for the gear-box premature failure) and ultimately the structural response (including damage and failure) of the roller-bearing components (e.g. inner raceways). Findings – It has been demonstrated that through the application of this approach, one can predict the expected life of the most failure-prone horizontal axis wind turbine gear-box bearing elements. Originality/value – To the authors’ knowledge, the present work is the first multi-length-scale study of bearing failure in wind-turbines.

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Chen, Chao, and Jorge Angeles. "Optimum Kinetimatics Design of Drives for Wheeled Mobile Robots Based on Cam-Roller Pairs." Journal of Mechanical Design 129, no. 1 (August 2, 2006): 7–16. http://dx.doi.org/10.1115/1.2359476.

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This paper proposes innovative drives for omnidirectional and quasi-omni-directional wheeled mobile robots. A novel epicyclic cam transmission is developed to transmit motion in the drives, with some advantages over its gear-train counterparts: low friction, high stiffness, and high precision. In this work, three new indices, the contact ratio in cam transmissions, the generalized transmission index, and the total transmission index, are proposed to evaluate the force and motion transmission qualities. Furthermore, the first two indices are the objective functions of the design of the dual-wheel transmission, the final design thus achieving the best transmission performance. The reported drives have been virtually prototyped.

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Chen, C.-G., and S.-T. Chiou. "Surface design of roller gear cam mechanisms with a turret in both translation and rotation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 6 (June 1, 2008): 1071–80. http://dx.doi.org/10.1243/09544062jmes855.

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Roller gear cam mechanisms (RGCMs) are used extensively as automatic tool changers of machining centres or as indexing mechanisms in various machinery. However, almost all the existing RGCMs have a turret in a rotational motion only. Thus for example, when they are used as a part of automatic tool changers, the translational motions of the tools have to be given by other mechanisms. An RGCM with a turret which can move with both translation and rotation simultaneously is proposed; such an RGCM may simplify the structure of some machines. By using D-H homogeneous coordinate transformation matrices, and applying the theory of conjugate surfaces, the model for the surface design of the RGCM is developed. Two examples are included to demonstrate the usages of the model and to verify its correctness.

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Olusegun, H. D., A. S. Adekunle, I. O. Ohijeagbon, K. A. Akande, and B. G. Mohammad. "Design, fabrication and evaluation of fish meal pelletizing machine." Journal of Science and Technology (Ghana) 37, no. 1 (February 12, 2018): 51–63. http://dx.doi.org/10.4314/just.v37i1.5.

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A 113.1kg/h fish meal pellet processing machine which produced 4mm diameter pellet, with an average length of 6mm was designed and fabricated. Design values of 210 was used for the maximum angle that the hopper wall formed with the vertical in the discharge zone, a critical stress of 1.3kPa of the ground particulate materials, and a density of 2.4521kg/m3 of the particulate materials, were used to obtain a hopper smallest outlet diameter of 12.7cm with a capacity of 24,118cm3 which proved efficient for the pelletizing machine. Two 3-cm diameter shafts carried the speed reduction gears with the perforated disc attached to the roller cutters on one end, while at the other end a 5hp motor was connected to the speed reduction gear by pulleys with diameters of 6cm and 12cm respectively. The speed reduction was 1:5 over a motor speed of 2000rpm. The fish meal pelletizing machine utilized 4kg of ingredients to produce 3.77kg pellets at an efficiency of 94.2%. The percentage loss due to unprocessed ground particulate materials was 5.8%.The moisture content of the fish meal pellets after 7days of drying in open air was 26.5% (wet basis). When tested for floatation, the pellets stayed afloat for 9 days, while the un-dried pellets only remained afloat for 2days. A combination of the weight of the twin roller cutters and the addition of some starch to the ground particulate materials assisted the compacting and gelatinization of pellet formed. This machine will be useful to medium and small scale aquaculture farmers and also reduce the need for foreign sources of fish meal in the aquaculture industry, thus conserving foreign exchange.Keywords: Ground particulate materials; mixing; compacting; gelatinizing; pelletizing

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Fang, Hui Min, and Gang Zhao. "The Development of Database System of Parameter and Coefficient for the Common Shafting Parts." Applied Mechanics and Materials 496-500 (January 2014): 1752–56. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1752.

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This article illustrates with the criterion of the common shafting accessorys design, using the Visual C++ and the Access to primarily set up the parameters and coefficients database of the shafting accessories, which are mostly the gear and the conical roller gearing. Setting up its function as demanding, appending and deletion, etc. Making the data processing for mechanical design and other fields conveniently. Through this research and exploitation, It can account for setting up the parameters and coefficients database of the standard accessory is necessary and really count for engineering.

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Romanyuk, N. N., V. N. Yednach, and S. A. Voynash. "Influence of the shape of potato tubers on the quality of separation into fractions by the working bodies of potato sorting machines." Traktory i sel'hozmashiny 1, no. 4 (2020): 35–44. http://dx.doi.org/10.31992/0321-4443-2020-4-35-44.

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Many agricultural producers are faced with problems of sorting flat and oval potato tubers into size fractions using roller sorting surfaces. The paper studies the influence of the shape of potato tubers on the speed of their orientation relative to the calibrating holes, and, as a consequence, the performance indicators of machines and the quality of the process performed. The aim of the study is to determine the causes of damage to tubers during sorting and ways to eliminate them. There was substantiated the relationship between the kinematic parameters of the roller surfaces of potato sorting machines and the shape of tubers, which makes it possible to reduce damage and improve the quality of sorting potatoes into fractions. A number of experiments were carried out to deter-mine the relationship between the shape of tubers and the kinematic parameters of the roller surface. In the first experiment, the number of tubers that will pass through the calibrating slot in a certain time was determined at different gear ratios in the drive of the rollers of the calibrating surface. In the second experiment, the time was found for a certain number of tubers of various shapes to pass through the calibrating surface. The graphs of the experimental dependences of the number of tubers of 43 mm thick passed into the calibrating gap between the rollers of 42 mm in 5 seconds on the ratio of the peripheral speeds between the rollers are presented. And the graphs of the dependence of the change in the time of passage of a group of tubers with a thickness of 40 and 42 mm through the gap between the rollers with a width 42 mm from the ratio of the peripheral speeds between the rollers are given. Based on the carried out studies, it was found that the ratio of the peripheral speeds of adjacent rollers, forming the calibrating slot, have a significant effect on the quality of the separation of tubers into fractions and are the cause of damage influenced by deformation. The presented analysis makes it possible to assess the influence of the shape of the tuber on the quality of the separation of tubers by roller calibrating surfaces of potato sorting machines, and also indicates the ways of improving the design of equipment for the finalization of potatoes after har-vest and before sale.

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Chen, Chao, Xiang Zhang, and Jorge Angeles. "Kinematic and Geometric Analysis of a Pure-Rolling Epicyclic Train." Journal of Mechanical Design 129, no. 8 (August 12, 2006): 852–57. http://dx.doi.org/10.1115/1.2735343.

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This paper reports an innovative design of epicyclic (planetary) cam trains based on pure-rolling contact, intended to overcome the drawbacks of gear trains, such as Coulomb friction and backlash. The kinematic relations of the mechanism with a given speed-reduction ratio are analyzed; accordingly, the profiles of the sun cam and ring cam, key elements of the mechanism, are obtained. Furthermore, the condition for undercutting avoidance of the ring cam is derived. For mechanical design, different layouts of the epicyclic cam trains are discussed for the structure and transmission optimization. Finally, an epicyclic cam-roller speed reducer is designed and prototyped.

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Jiang, Dong Hua, Dong Wei Shao, and Ji Yi Luan. "The Optimum Design on the Roller Chain Drive of the Machine for Supplementing the Traditional Chinese Pills." Advanced Materials Research 430-432 (January 2012): 1378–81. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1378.

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The roller chain drive of the machine for supplementing traditional Chinese pills has movement characteristics of gear drive and belt drive, and its movement is a little complex, so interior point penalty function method is applied in the optimum design of chain. First of all, the optimizing mathematical model is built by applying the interior point penalty function method, and the design variables, the target function and constraints are proposed, and then the optimal solution for key parameters of drive chain is obtained by the iterative, which will provide the reference and basis for the research on big drive power and the least rows number of drive chain.

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Zhang, Yuhua, and Joong-Ho Shin. "A Computational Approach to Profile Generation of Planar Cam Mechanisms." Journal of Mechanical Design 126, no. 1 (January 1, 2004): 183–88. http://dx.doi.org/10.1115/1.1637652.

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A new approach, called a Relative Motion Method (RMM), is proposed for designing the shape of the disk cam, which uses the relative velocity and the relative acceleration of a follower respect to a cam to discover the profile coordinate, the pressure angle and the radius of curvature on the cam. It is characterized by the procedures of automatic derivation and solution with computers and the suitability not only for general disk cams with different kinds of follower, such as sharp edge follower, roller follower, flat-faced follower, and so on, but also for the double-disk conjugate cams, single-disk conjugate cams and roller gear conjugate cams. A program for design automation of shape of the disk cam and the kinematics simulation of this kind of mechanism has been developed using the proposed approach with C++ language. Finally, an example is given.

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Xu, Lan Ying, Yong Mao, and Qiang Wu. "Analysis of Bearing Mechanics Characteristic of Wind Turbine." Key Engineering Materials 621 (August 2014): 188–94. http://dx.doi.org/10.4028/www.scientific.net/kem.621.188.

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The transmission gear, bearing and hub and important component of wind field prone to fatigue failure under thermal load and alternating stress. The core component of MW class wind turbine gear box is bearing parts, according to the Betz principle bearing dynamic characteristic is analyzed including deduction and calculation of axial force and radial force, this paper simulates contact stress under the typical conditions of cylindrical roller bearing by finite element method, meanwhile analyzes the stress variation of the rolling body and a holding frame, the simulation results show that bearings bear a greater impact load in the starting process, retainer and rolling body produce large instantaneous stress value in the process, while the stress value is relatively small in the smooth operation and at braking speed, The simulation results has some practical value in engineering of optimization design.

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Osama, Muhammad, Najam Waseem, and Emran Ullah. "Alternative for Renewable Energy." JOURNAL OF NANOSCOPE (JN) 2, no. 2 (December 23, 2021): 151–61. http://dx.doi.org/10.52700/jn.v2i2.40.

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Importance of renewable energy resources has increased since the discussion on climate change has evolved from a lesser-known fact to a global issue. Heavy traffic across the globe has increased abruptly. Utilization of the energy generated by the interference of wheels of a moving vehicle and a speed breaker. A roller conveyor would serve as a part of the road that is embedded as a speed breaker. Millions of cars pass through the national highways if we are to implement the system or the project which is under consideration by means of the “Power generation by using the speed breakers”. The apparatus would consist of a roller conveyor attached to a full-fledged mechanical gear operational on the rack and pinion mechanism. The product design is assembled to acquire less space and provide more useful energy. The product design is feasible and can be implemented across the globe anywhere on the highways. The whole concept is based upon the electromechanical principles of physics mainly. Keywords: Renewable energy, electromagnetism, electrical power, energy demands, speed breakers.

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Fiyebo, S. A. B., Osagie Ibhadode, M. O. Fabiyi, and Adebayo Adekunle. "Reverse Engineering Approach for the Design of Gear-box for a Hand-guided Vibratory Roller Soil-Compactor." International Journal of Engineering Research and Advanced Technology 06, no. 10 (2020): 30–48. http://dx.doi.org/10.31695/ijerat.2020.3655.

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Chang, Zong Yu, Yu Hu Yang, Ce Zhang, Shou Bin Ding, Bin Zhang, Deng Shan Tan, and Chun Tao Zhu. "Geometry Modeling for Indexing Cams Based on Screw Theory and Product of Exponential Formula." Materials Science Forum 505-507 (January 2006): 991–96. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.991.

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This paper proposes a method of geometry modeling for indexing cam mechanism by using screw theory and exponential product formula. Kinematic analysis based on screw theory is introduced firstly. Then, method to model surface of indexing cams is presented when screw theory and exponential product formula are applied. The paper gives examples to obtain the geometry models of roller gear cam, barrel indexing cam and parallel indexing cam. Our work suggests that this method can avoid the burdensome work on building coordinate systems, transformation matrixes and understanding on the mechanism. Moreover, this method can be used to innovate and design new types of indexing mechanism.

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Rakhmanov, S. P., and V. V. Povorotniy. "System dynamics of a pipe pilger CRM working stand." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 6 (July 26, 2019): 725–34. http://dx.doi.org/10.32339/0135-5910-2019-6-725-734.

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Efficiency of the pilger cold rolling of pipes process realization can be increased both by perfection of the rolling process and by a selection of rational parameters of the base technological equipment and the mills functioning regimes. Particular attention should be paid to the increase of reliability of functioning, increase of high-speed and productivity of pipe cold rolling mills (CRMs). Results of the system analysis of dynamics of pipe CRM working stand of various designs presented. A calculation algorithm elaborated and differential equations of the pipe CRM working stand obtained. Pictures of dynamic motions for selected pipe CRM working stand obtained. The analysis of theoretical studies showed, that for stabilization of the stand base elements it is necessary to increase the rigidity of the working stand correspondent elements. It was shown, that the stand rigidity increase reached by arrangement longitudinal bridge of variable thickness, connecting the internal and external structure’ casing. An optimal design roller actuator elaborated. Implementation of the actuator will enable to accomplish the technological process more effectively, since the unit’ elements can adopt all possible inaccuracy of the working stand manufacturing and assembling, as well as housing post deformation. It was ascertained, that the roller actuator of optimal design, above all, plays a role of an emergency gear of the pipe CRM working stand. The studies revealed that increase of productivity and quality of the manufactured products reached mainly by application of the working stand of rational design at the pipe CRM. The industrial running the modified variant of working stand design during eight years to roll hard-deformed steels and alloys confirm its high efficiency at production of precision high quality pipes.

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Tamamoto, Takumi, Keita Takeuchi, and Koichi Koganezawa. "Development of Gripper to Achieve Envelope Grasping with Underactuated Mechanism Using Differential Gear." Journal of Robotics and Mechatronics 30, no. 6 (December 20, 2018): 855–62. http://dx.doi.org/10.20965/jrm.2018.p0855.

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In a previous study, we developed a seven-axis multi-joint gripper (MJG) with a mechanism for varying the joint stiffness and showed that it was capable of dexterous grasping. In this research, we expand this design by introducing a hand with several multi-jointed fingers. The mechanism of grasping with this hand involves the use of serially connected differential gear systems (DGSs). The DGSs are controlled by only two actuators: one for driving the joints simultaneously and the other for adjusting the stiffness of all of the joints. The hand is shown to successfully grasp and envelope objects of some shapes without sensory feedback and handle objects by pinching them with the finger tips and subsequently transitioning to an envelope grasp. The mechanism that significantly contributes to this result is the tip roller attached to the fingertip. It is incorporated into the joint drive mechanism using a DGS. These functionalities are considerably advantageous in scenarios where information about the objects to be grasped, such as the shape and precise position, cannot be obtained.

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Toshov, Javokhir, Bakhtiyor Baratov, and Umid Baynazov. "Method of calculating the gear ratios of the cones of tricone drill bits." E3S Web of Conferences 201 (2020): 01012. http://dx.doi.org/10.1051/e3sconf/202020101012.

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The process of rock destruction under dynamic impact on it through two technological criteria in the form of specific contact and specific volumetric fracture works is evaluated. Specific contact and specific volumetric fracture work are used to study the physical and mechanical properties of rocks. The efficiency of rock destruction during well drilling with tricone bits functionally depends on the relative specific contact and specific volumetric fracture work. It is stated that the criteria for evaluating the performance of tricone bits in certain forms are functions of the triad: bit-rock-energy. The disclosed physical nature of the kinetic criteria and the obvious functional dependence on the geometric parameters of these drill bits are an objective basis for constructing a methodology for improving the dynamics of new designs and modifications. The parameters of the kinetic passport of the bit are calculated and presented in tabular and graphical forms as functions corresponding to their coordinates of the cones of the roller cutters and the bottom of the well. Experience in solving optimization problems based on a comparative analysis of kinetic (dynamic) criteria has shown that a) when improving almost any design of a cone bit, it is necessary to use the initial geometrical parameters of the buttons and their number b) to ensure that the supports of adjacent cones are equally loaded along the path of leveling the minimum volumetric fracture work of crowns adjacent cones.

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Journal articles on the topic 'Design, roller gear'

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