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Journal articles on the topic 'Flywheel tooth angle errors'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Zhao, Ning, and Hui Guo. "Research on Meshing of Face Gear Drive under Errors of Alignment and Machining." Applied Mechanics and Materials 44-47 (December 2010): 1948–51. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1948.

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The coordinate systems for cutting face gears and for meshing of face gear drive with involute cylindrical pinion. The tooth surface equation of face gear with machining errors is deviated, such as change of shaft angle, change of shortest distance between face gear and cutter tool axes, helix angle of cutter tool. Tooth contact analysis applied in the paper considered with the alignment error of the driving system. The tooth contact path and the transmission error of the face gear drive were simulated through the tooth contact analysis for different alignment errors and machining errors. The

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2

Tang, Jiqiang, Ying Wang, Bin Liu, and Xiaofeng Zhao. "Suppression of high-frequency disturbance to satellite by Vernier-gimballing magnetically suspended flywheel." Transactions of the Institute of Measurement and Control 41, no. 9 (2018): 2465–74. http://dx.doi.org/10.1177/0142331218801161.

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The high-frequency disturbance acting on a satellite decreases the satellite’s stability and pointing precision. The common flywheel is generally used to suppress it, but the number of the required flywheels is usually five or more and that will make the satellite overweight. The magnetically suspended flywheel (MSFW) with Vernier-gimballing capability (Vernier-gimballing MSFW) is proposed in this paper to suppress the high-frequency disturbance. In addition, a comparative simulation research has been done for a satellite controlled by Vernier-gimballing MSFW or reaction FW. It is worth noting

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3

Koumpia, Effimia, Athanasios E. Athanasiou, Theodore Eliades, and Michael Knösel. "Precision of a Reflectance Spectrophotometer in Measuring Anterior Tooth Color." Open Dentistry Journal 12, no. 1 (2018): 884–95. http://dx.doi.org/10.2174/1874210601812010884.

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Background: Intraorally, a common instrumental approach for measuring tooth color is reflectance spectrophotometry. Objective: To evaluate the precision of a reflectance spectrophotometer in accurately measuring anterior tooth color. Methods: The twelve labial surfaces of the anterior teeth of sixteen patients were measured spectrophotometrically (SpectroShadeTM Micro) on three non-consecutive days (1st, 2nd, 8th). Tooth color was converted to L*, a* and b* colorimetric values; intra-examiner repeatability was assessed in ΔΕ-units between two same day repeated measurements. Intra-examiner repr

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4

Todorovic, Aleksandar, Dejan Lisjak, Vojkan Lazic, and Aleksandra Spadijer-Gostovic. "Possible errors during the optical impression procedure." Serbian Dental Journal 57, no. 1 (2010): 30–37. http://dx.doi.org/10.2298/sgs1001030t.

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Introduction. Modern technologies offer a range of benefits and significantly improve specific therapeutic procedures in dentistry. However, despite gaining experience and training there are still some mistakes in their implementation. The aim of this study was to describe the most common errors during intraoral scanning, 'optical impression' procedure, during CAD-CAM technology for production of dental restorations. Material and Methods. Cerec? 3D CAD-CAM system for one visit tooth reconstruction by inlays, onlays, endocrowns, half and complete crowns and veneers from the ceramic material was

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5

Wu, Yu Ren, and Van The Tran. "Lead Crowning and Anti-Twist for Tooth Flank of a Heat Treated Helical Gear on Internal CNC Honing Machine." Applied Mechanics and Materials 799-800 (October 2015): 554–59. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.554.

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The internal gear honing is more popular than the external gear honing by its advantages such as higher contact surface and easier correct profile errors. It is usually applied for modifying the gear surface to compensate for the distortions after heat treatment process. However, the lead crowning and anti-twist tooth flank of a helical gear on internal CNC gear honing has not studied yet. Therefore, a novel method for lead crowning tooth flank of work gear surfaces is proposed by using a linear swivel angle function of the honing wheel and a variable pressure angle (VPA) honing wheel is also

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Meuleman, P. Klein, D. Walton, K. D. Dearn, D. J. Weale, and I. Driessen. "Minimization of transmission errors in highly loaded plastic gear trains." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 221, no. 9 (2007): 1117–29. http://dx.doi.org/10.1243/09544062jmes439.

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Transmission errors (TEs) are an important source of unwanted noise and vibration in gear drives. Errors can result from geometrical inaccuracies and from elastic deformations. Plastic drives are often loaded in a way that produces high deflections relative to steel gears, and the elastic component of TE is relatively more important. Furthermore, plastic gears are often run in mesh with gears made from steel or other metals. In this case there is a large difference in tooth stiffness, which leads to unusual TE problems. The current paper discusses the origins of elastic TEs and means of their

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7

Wang, Zhi, Qing Chen, Jia Chun Lin, and Li Li Yang. "Study of the Dynamic Behavior of Face Gear Transmission System." Applied Mechanics and Materials 268-270 (December 2012): 1063–66. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1063.

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According to the gear meshing theory, the tooth surface equation of orthogonal face gear is derived and the mathematical model is established. Also the model was provided for simulating the bevel gear transmission system concerning the time variant stiffness and face gears errors under static load and cyclic loads. Through the model the computerized analysis of speed, angle and acceleration of gear real tooth surface could be accomplished. Rattle as discussed under condition of different static loads and the constant cyclic loads.

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8

Zhou, Jiaming, Fengyan Yi, Xiangyang Xu, Junbin Lai, Yanfang Liu, and Peng Dong. "Effect of Tooth Profile Modification on Dynamic Tooth Load of Planetary Gear Train." Shock and Vibration 2019 (December 10, 2019): 1–20. http://dx.doi.org/10.1155/2019/8156971.

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This paper aims at investigating the effects of tooth profile modification (TPM) on the dynamic response of planetary gear train (PGT). A numerical model is carried out to calculate two major excitation sources of PGT, time-varying mesh stiffness (TVMS), and transmission errors (TEs). On this basis, a linear time-varying dynamic model of a PGT considering TVMS, TEs, and TPM is developed. Dynamic deviation factor is further introduced to describe the dynamic response of the PGT. In this paper, TPM is only applied to the external meshes firstly. Effects of TPM parameters, such as amount of TPM,

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9

Wang, Hai Xia, Jia Dong Chang, and Lei Zhang. "Effect of Assembly Error on the Meshing Characteristic of Spacial Beveloid Gears." Advanced Materials Research 479-481 (February 2012): 2533–39. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2533.

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For the beveloid gears with intersecting axis and crossed axis coexisted in the marine gearbox with small down angle, contact analysis of the meshing gear pair taken the assembly error into consideration is proposed based on the nonlinear finite element analysis software Abaqus. Considering the central distance error, axial position error and the angle error, the FE model of beveloid gear pair with intersecting axis and crossed axis were established, respectively, and the tooth contact stress, the maximum influence factor and transmission error were calculated. The effects of these errors, the

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10

Wan, Peng, Jun Jie Guo, and Hai Tao Li. "Study on the Method of Error Identification and Compensation for Gear Measuring Center." Advanced Materials Research 482-484 (February 2012): 1821–28. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1821.

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Gear Measuring Center(GMC) is commonly used to test error of the tooth surface of the gear, whose geometric accuracy directly impacts on the accuracy of measurement. How to quickly and accurately detect space geometric error of the measuring machine and compensate becomes the essential means of high-precision measurements. According to the problem above, in the paper, three-beams laser detection technology is proposed. The detection of the geometric errors of the linear axis was achieved. The accurate measurement for the position and attitude of the plane mirror on measurement seat was achieve

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11

Liu, Guang Lei, Yue Jun Tian, and Ping Jiang. "Realization of Expected Direction Angle of SGM Spiral Bevel Gears Based on Local Synthesis." Applied Mechanics and Materials 37-38 (November 2010): 927–33. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.927.

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The authors propose an optimization method based on local synthesis to fulfill the expected contact path (ECP) at mean contact point (M) of spiral bevel gears. The method is a combination of local synthesis, tooth contact analysis (TCA) and application of optimization. Machine-tool settings based on local synthesis are found and contact path (CP) on tooth surface is formed. TCA extracts the information from CP and transforms it to a projected CP (PCP) by rotation in a plane across gear axis. An objective function is established by contrasting ECP to PCP. A program in Matlab language is develop

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12

Wang, Jianhong, Jian Wang, and Teik C. Lim. "Influence of assembly error and bearing elasticity on the dynamics of spur gear pair." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 11 (2015): 1805–18. http://dx.doi.org/10.1177/0954406215584632.

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The elasticity and geometrical errors of precision elements are one of the major factors affecting vibration responses in geared transmission systems. In this study, the influences of assembly error and bearing elasticity on the spur gear dynamic behavior are analyzed. A lumped parameter model for spur gear pair is formulated by representing the bearing elasticity with infinitesimal spring elements and tooth stiffness time function as rectangular waveform. The nonuniform tooth contact load is also considered. The severity of assembly error is assumed to be sufficiently small such that no parti

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13

Faraj, Bestoon Mohammed. "Estimation Accuracy of Root Canal Curvatures from Different Dental Diagnostic Imaging Techniques: An In Vitro Experimental Study." BioMed Research International 2021 (January 13, 2021): 1–8. http://dx.doi.org/10.1155/2021/6699635.

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In clinical endodontics, preoperative estimation of root canal curvature is crucial regarding the prevention of iatrogenic errors. Reproduction of the two-dimensional radiographic images causes certain proximal view curvatures not seen. Therefore, the present study is aimed at investigating the degree of root canal curvature identified in different radiographic views. A total of 60 human permanent single-rooted teeth with varying degrees of curvature were selected. The root canal curvature for each tooth was measured on cone-beam computed tomography (CBCT) images (clinical view), standard digi

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14

Yu, Shui Qin, Zhi Yong Wang, and Jian Tang. "First-Order Proportional Modification Parameters for Spiral Bevel Gears Manufactured by Spread Blade Method." Applied Mechanics and Materials 246-247 (December 2012): 118–21. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.118.

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The proportional modification parameters are useful for modifying the tooth form errors of spiral bevel gears. Based on the mathematical model for calculating the machine setting parameters and according to the relative position relationship between cutter and workpiece and the curvature and vector of calculation point, the formulae for calculating the first-order proportional modification parameters for gears machined by spread blade method was deduced. The proportional modification parameters can make the pressure angle or spiral angle of the concave flank and the convex flank produce unifor

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15

Syzrantsev, V. N., E. Y. Moskvina, and L. A. Chernaya. "A Method of Profile Modification of the Tooth Surface of Semi-Rolled Pan Gear." Proceedings of Higher Educational Institutions. Маchine Building, no. 05 (722) (May 2020): 32–40. http://dx.doi.org/10.18698/0536-1044-2020-5-32-40.

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The use of drives based on pan precession gears with a small shaft angle in which multiple-tooth meshing is implemented significantly increases the efficiency and transmitted torque in oil and gas equipment. It also and reduces the breakaway torque by almost an order in comparison with worm gears. The production of pan gears in the semi-rolled version significantly simplifies tooth cutting technology. To exclude the possibility of edge contact of the teeth coming into meshing due to their contact and bending deformations, it is necessary to carry out profile correction of the teeth. To address

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16

Cai, Y. "Simulation on the Rotational Vibration of Helical Gears in Consideration of the Tooth Separation Phenomenon (A New Stiffness Function of Helical Involute Tooth Pair)." Journal of Mechanical Design 117, no. 3 (1995): 460–69. http://dx.doi.org/10.1115/1.2826701.

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In this paper, an exact vibration model for helical gear pairs, is developed assuming no spacing error and no shaft run-out, in consideration of nonlinear tooth separation phenomenon. Inside the model, a simple modified stiffness function, including the effect of tooth numbers and addendum modification coefficients, is proposed for a helical involute tooth pair. This new stiffness function is verified by comparing its results with theoretical calculation and experiment. The rotational vibration of helical gear pairs with comparative narrow face width is simulated clearly on a 16-bit personal c

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17

Tran, Van-The. "Generation of a double-crowned involute helical gear with twist-free tooth flanks by a CNC hobbing machine with three synchronous axes." Vietnam Journal of Mechanics 39, no. 2 (2017): 97–108. http://dx.doi.org/10.15625/0866-7136/8005.

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In the conventional hobbing process, a double-crowned involute helical gear is generated by the hob cutter with parabolic-curve tooth profiles for the cross-profile crowning and varied the center distance between the hob and work gear for the longitudinal crowning. Therefore, to cut a double-crowned helical gear not only requires at least four synchronous axes and hob cutter regrinding (which increases production costs) but also induces twisted tooth flanks on the generated work gear. In this paper, I propose a hobbing method by applying a modified work gear rotation angle that enables double-

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18

Dong, Hao, Ling-ling Duan, Jun-an Zhang, and Zhou Fang. "Load-Sharing Characteristics of Power-Split Transmission System Based on Deformation Compatibility and Loaded Tooth Contact Analysis." International Journal of Aerospace Engineering 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/305808.

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In order to implement the uniform load distribution of the power-split transmission system, a pseudostatic model is built. Based on the loaded tooth contact analysis (LTCA) technique, the actual meshing process of each gear pair is simulated and the fitting curve of time-varying mesh stiffness is obtained. And then, the torsional angle deformation compatibility conditions are proposed according to the closed-loop characteristic of power flow, which will be combined with the torque equilibrium conditions and elastic support conditions to calculate the transfer torque of each gear pair. Finally,

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19

Zhan, Jiaxing, and Mohammad Fard. "Effects of helix angle, mechanical errors, and coefficient of friction on the time-varying tooth-root stress of helical gears." Measurement 118 (March 2018): 135–46. http://dx.doi.org/10.1016/j.measurement.2018.01.021.

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20

Cao, Junjun, Junliang Cao, Zheng Zeng, and Lian Lian. "Nonlinear multiple-input-multiple-output adaptive backstepping control of underwater glider systems." International Journal of Advanced Robotic Systems 13, no. 6 (2016): 172988141666948. http://dx.doi.org/10.1177/1729881416669484.

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In this article, an adaptive backstepping control is proposed for multi-input and multi-output nonlinear underwater glider systems. The developed method is established on the basis of the state-space equations, which are simplified from the full glider dynamics through reasonable assumptions. The roll angle, pitch angle, and velocity of the vehicle are considered as control objects, a Lyapunov function consisting of the tracking error of the state vectors is established. According to Lyapunov stability theory, the adaptive control laws are derived to ensure the tracking errors asymptotically c

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21

Mo, Shuai, Ting Zhang, Guoguang Jin, Zhanyong Feng, Jiabei Gong, and Shengping Zhu. "Influence mechanism of multi-coupling error on the load sharing characteristics of herringbone gear planetary transmission system." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 4 (2019): 792–816. http://dx.doi.org/10.1177/1464419319848175.

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The load sharing characteristics of the herringbone planetary transmission system are a key indicator for evaluating the bearing stability and reliability of each planet gear in the transmission system. The value of the load sharing coefficient is closely related to the manufacturing error and the assembly error in gear processing and assembly process. Therefore, it is indispensable to study the influence mechanism of these errors on the load sharing characteristics of the transmission system. Nevertheless, researches on the multi-coupling transmission error to the load sharing characteristics

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22

Umeyama, M., M. Kato, and K. Inoue. "Effects of Gear Dimensions and Tooth Surface Modifications on the Loaded Transmission Error of a Helical Gear Pair." Journal of Mechanical Design 120, no. 1 (1998): 119–25. http://dx.doi.org/10.1115/1.2826663.

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Analysis of the loaded transmission error proved that the actual contact ratio and the effective contact ratios are the valid indices. In order to calculate the loaded transmission error, deformations of a pair of teeth are estimated using Hertzian formulas for the approach deformation and approximate formulas based on the FEM for the bending deflection. The actual contact ratio εr is defined using the rotational angle during which a tooth pair is actually in contact with each other. εr increases with the increase of applied loads. The effective contact ratio, εn, is determined geometrically b

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23

Hao, Dong, Zhang Hao-qin, Zhao Xiao-long, and Duan Ling-ling. "Study on the load-sharing characteristics of face-gear four-branching split-torque transmission system." Advances in Mechanical Engineering 13, no. 4 (2021): 168781402110099. http://dx.doi.org/10.1177/16878140211009984.

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In order to solve the load-sharing characteristics of face-gear four-branching split-torque transmission system (FGFBSTTS), the static load-sharing mechanical analysis model was established. In the model, the deformation coordination conditions of torsional angle and torque balance condition were considered. By using Loaded Tooth Contact Analysis (LTCA) technology of face gear and herringbone gear, the time-varying meshing stiffness was calculated. The influences of manufacturing errors, installation errors, I-stage pinion floating, II-stage pinion spline clearance floating, and radial limit r

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24

Sun, Xiaoyu, Yanping Liu, Yongqiang Zhao, and Ming Liu. "EHL Analysis of Spiral Bevel Gear Pairs considering the Contact Point Migration due to Deformation under Load." Mathematical Problems in Engineering 2020 (June 22, 2020): 1–19. http://dx.doi.org/10.1155/2020/2047876.

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The actual contact point of a spiral bevel gear pair deviates from the theoretical contact point due to the gear deformation caused by the load. However, changes in meshing characteristics due to the migration of contact points are often ignored in previous studies on the elastohydrodynamic lubrication (EHL) analysis of spiral bevel gears. The purpose of this article is to analyze the impact of contact point migration on the results of EHL analysis. Loaded tooth contact analysis (LTCA) based on the finite element method is applied to determine the loaded contact point of the meshing tooth pair

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25

Makandar, Saleem D., Mohammed Imran Khaiser, Sneha R. Mali, et al. "Plywood Jig—A New Technique for Root Canal Curvature Measurement." Applied Sciences 11, no. 9 (2021): 3999. http://dx.doi.org/10.3390/app11093999.

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The successful outcome of endodontic treatment is dependent on complete cleaning, shaping as well as three dimensional obturation of the root canal system. A conventional radiograph is a two-dimensional replication of a three-dimensional object and does not provide any conclusive evidence for canal curvatures. An accurate knowledge of the tooth anatomy and curvature is essential to avoid procedural errors. 100 freshly extracted human teeth were used in this study. Digital images were obtained using the plywood JIG and Schneider’s technique. These images were analyzed using the VixWin Pro digit

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26

Faassen, R. P. H., N. van de Wouw, H. Nijmeijer, and J. A. J. Oosterling. "An Improved Tool Path Model Including Periodic Delay for Chatter Prediction in Milling." Journal of Computational and Nonlinear Dynamics 2, no. 2 (2006): 167–79. http://dx.doi.org/10.1115/1.2447465.

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The efficiency of the high-speed milling process is often limited by the occurrence of chatter. In order to predict the occurrence of chatter, accurate models are necessary. In most models regarding milling, the cutter is assumed to follow a circular tooth path. However, the real tool path is trochoidal in the ideal case, i.e., without vibrations of the tool. Therefore, models using a circular tool path lead to errors, especially when the cutting angle is close to 0 or π radians. An updated model for the milling process is presented which features a model of the undeformed chip thickness and a

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27

Dmitrienko, Tatyana, Dmitry Domenyuk, Mikhail Porfyriadis, Anna Arutyunova, Andrey Kondratyuk, and Roman Subbotin. "CONNECTION BETWEEN CLINICAL AND RADIOLOGICAL TORQUE OF MEDIALINCISORS AT PHYSIOLOGICAL OCCL." Archiv Euromedica 9, no. 1 (2019): 29–37. http://dx.doi.org/10.35630/2199-885x/2019/9/1/29.

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Aim. To determine the link between the clinical and radiological torque of the medial incisors in cases with physiological occlusion. Materials and methods. A measurement of the clinical torque values was performed (whereas the torque is defined as the deviation of the tooth crown vestibular surface from the occlusal plane) in 98 people with physiological occlusion and a full set of permanent teeth. When measuring the clinical incisor torque, three methods were employed. The first method allowed studying teeth torque in relation to the occlusal plane on the cast jaw models using the ArcoZet eq

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28

Liang, Chengcheng, Chaosheng Song, Caichao Zhu, Yawen Wang, Siyuan Liu, and Ruihua Sun. "Investigation of Tool Errors and Their Influences on Tooth Surface Topography for Face-Hobbed Hypoid Gears." Journal of Mechanical Design 142, no. 4 (2019). http://dx.doi.org/10.1115/1.4044745.

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Abstract Tool errors are inevitable in an actual gear-manufacturing environment and may directly affect the accuracy of machined tooth surfaces. In this paper, tool errors including spheric radius, pressure angle, rake angle, regrind angle, and cutting side relief angle errors for three-face blade are defined and considered to establish the accurate tooth surface mathematical model for face-hobbed hypoid gears based on the manufacturing process and the meshing theory. The simulation flowchart for tooth surface modeling and tooth surface topography deviation analysis are proposed and performed.

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29

Li, Shuting. "Contact Stress and Root Stress Analyses of Thin-Rimmed Spur Gears With Inclined Webs." Journal of Mechanical Design 134, no. 5 (2012). http://dx.doi.org/10.1115/1.4006324.

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Loaded tooth contact analysis (LTCA), deformation, and stress calculations of three types of thin-rimmed spur gears with inclined webs at the left side, the center, and the right side of the tooth are conducted in this paper with finite element methods (FEM) combined with a mathematical programming method when these gears are engaged with a solid mating gear. The contact stresses on the tooth surfaces, the bending stresses at the tooth roots, and the joint stresses of the rim and the web are analyzed as the web position and the web angle are changed. It was found that the web position and the

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30

Tran, Van-The, Ruei-Hung Hsu, and Chung-Biau Tsay. "Tooth Contact Analysis for a Double-Crowned Involute Helical Gear With Twist-Free Tooth Flanks Generated by Dual-Lead Hob Cutters." Journal of Mechanical Design 137, no. 5 (2015). http://dx.doi.org/10.1115/1.4029586.

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To double-crown an involute helical gear, a hobbing method is proposed by setting the hob's diagonal feed motion as a second-order function of hob's traverse movement and modifying the tooth profile of hob cutter into a dual-lead form with pressure angle changed in its longitudinal direction. Merits of the proposed double-crowning method are also verified by using three computer simulation examples to illustrate and compare the topographies of tooth flanks, contact ellipses, and transmission errors under various assembly errors of the double-crowned gear pairs with those produced by using the

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Sun, Ruihua, Chaosheng Song, Caichao Zhu, Siyuan Liu, and Changxu Wei. "Tooth Surface Modelling and Mesh Behaviors for Paralleled Beveloid Gears." Journal of Mechanical Design 142, no. 5 (2019). http://dx.doi.org/10.1115/1.4045141.

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Abstract This paper proposed a new tooth surface modeling method for beveloid gear based on the real cutter surface using two orthogonal variables. Then, the analytical mesh model with and without misalignments were derived and solved to study the influences of geometry design parameters on contact behaviors for paralleled beveloid gear pair. Loaded tooth contact analysis is used to validate the proposed mesh model by abaqus software, and the error is below 5%. Results suggest that the increase in pressure, cone, and helical angles enlarge the contact area for meshing without misalignments. Th

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32

Kolivand, M., and A. Kahraman. "An Ease-Off Based Method for Loaded Tooth Contact Analysis of Hypoid Gears Having Local and Global Surface Deviations." Journal of Mechanical Design 132, no. 7 (2010). http://dx.doi.org/10.1115/1.4001722.

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Actual hypoid gear tooth surfaces do deviate from the theoretical ones either globally due to manufacturing errors or locally due to reasons such as tooth surface wear. A practical methodology based on ease-off topography is proposed here for loaded tooth contact analysis of hypoid gears having both local and global deviations. This methodology defines the theoretical pinion and gear tooth surfaces from the machine settings and cutter parameters, and constructs the surfaces of the theoretical ease-off and roll angle to compute for the unloaded contact analysis. This theoretical ease-off topogr

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33

Ratanasumawong, Chanat, Shigeki Matsumura, Tetsuo Tatsuno, and Haruo Houjoh. "Estimating Gear Tooth Surface Geometry by Means of the Vibration Measurement: Distinction of the Vibration Characteristics of Gears With Tooth Surface Form Error." Journal of Mechanical Design 131, no. 10 (2009). http://dx.doi.org/10.1115/1.3184692.

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Tooth surface measurement is an important way to verify the quality of produced gears. To reduce inspection time and cost, only a few tooth profiles and traces on some teeth are inspected. Measured data are not likely representatives of all gear teeth because errors may occur in assembly procedure and affect tooth contact condition. Frequently, tooth surface measuring data cannot show contact condition and used to predict gear vibration accurately. Field inspection method whose measured results relate directly to the meshing condition is required. This paper derives the relationship between me

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34

Kolivand, M., H. Ligata, G. Steyer, D. K. Benedict, and J. Chen. "Actual Tooth Contact Analysis of Straight Bevel Gears." Journal of Mechanical Design 137, no. 9 (2015). http://dx.doi.org/10.1115/1.4031025.

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Theoretically, spherical involutes are used as one of the base topographies for straight bevel gears. Actual bevel gears, however, have deviations from their intended topographies due to manufacturing errors, heat treatment deviations, and finishing processes. Measuring the physical parts with coordinate measuring machines (CMMs), this study proposes a new approach to capture such deviations. The measured deviations from spherical involute are expressed in form of a third-order two-dimensional (2D) polynomial function and added to the base topography to duplicate the geometry of the actual par

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35

Matsumura, Atsushi, Tamaki Nakano, Shinji Ono, Akihiro Kaminaka, Hirofumi Yatani, and Daijiro Kabata. "Multivariate analysis of causal factors influencing accuracy of guided implant surgery for partial edentulism: a retrospective clinical study." International Journal of Implant Dentistry 7, no. 1 (2021). http://dx.doi.org/10.1186/s40729-021-00313-2.

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Abstract Background In dental implant treatment, the placement position of the implant body is important. The hypothesis is that there are factors that have a greater impact than the factors that have been studied so far. Material and Methods The deviation between planned and actually placed implants was measured three-dimensionally by modified treatment evaluation method in 110 patients who underwent implant placement with guided surgery for partial edentulism. Ten factors that seemed to affect errors in placement were selected: the type of tooth, type of edentulism, distance from the remaini

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