Relevant bibliographies by topics / Generating gear grinding

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Generating gear grinding'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Generating gear grinding"

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Kampka, Marco, Christoph Löpenhaus, and Fritz Klocke. "Development of a Methodology for Analyzation of the Influence of Pitch Diameter Shift on the Generating Gear Grinding Process." Advanced Materials Research 1140 (August 2016): 149–56. http://dx.doi.org/10.4028/www.scientific.net/amr.1140.149.

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In order to improve load carrying capacity and noise behaviour, case hardened gears are usually hard finished. One possible process for hard finishing of gears is generating gear grinding, which has replaced other grinding processes in batch production of small and middle sized gears due to high process efficiency. Especially generating gear grinding of large module gears with a module higher than mn > 8 mm can be challenging due to high process forces and the resulting excitation, which can influence gear quality negatively. TÜRICH suggested applying a pitch diameter shift during generating gear grinding to equal out the number of contact points between the left and right flanks of the gear with the grinding tool [1]. This qualitative approach is not sufficient to predict the process behaviour because it does not take the changing radii of the curvature of the involute into account and, therefore, the changing contact conditions along the gear profile. In this paper a methodology to quantify the influence of pitch diameter shift on the generating gear grinding process using a manufacturing simulation is introduced. Additionally this methodology is validated for one manufacturing test case.
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Hübner, Florian, Christoph Löpenhaus, Fritz Klocke, and Christian Brecher. "Extended Calculation Model for Generating Gear Grinding Processes." Advanced Materials Research 1140 (August 2016): 141–48. http://dx.doi.org/10.4028/www.scientific.net/amr.1140.141.

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Generally, hard finishing is the final step in manufacturing cylindrical gears. The most established processes for hard finishing are continuous generation grinding and discontinuous profile grinding [1]. Despite the wide industrial application of the continuous generation grinding process, only few scientific investigations exist. One possible reason for this are the complex contact conditions between tool and gear flank. Modelling the complex contact conditions between grinding worm and gear to calculate cutting forces, characteristic values as well as micro- and macroscopic gear geometry are the topics of this paper. The approaches are introduced and results for validation are presented and discussed.
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Guo, Hui, and Shu Yan Zhang. "Grinding Experiment Research of Face Gear with CNC Machine." Applied Mechanics and Materials 496-500 (January 2014): 503–6. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.503.

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A grinding method with CNC machine for face gears is studied. Firstly, the single indexing generating grinding method of face gear is introduced. Then, a grinding experiment of face-gear is performed on a CNC grinding machine with five degrees of freedom, and the tooth deviation is measured on gear measuring center. The tooth surface error is obviously decreased after grinding, and the precision of face gear tooth surface is improved significantly. Finally, a rolling test is performed which indicates that the contact path on face gear before grinding shows discontinuous because the surface deviation is over big. The contact path gets better after grinding.
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Schrank, Maximilian, Jens Brimmers, and Thomas Bergs. "Potentials of Vitrified and Elastic Bonded Fine Grinding Worms in Continuous Generating Gear Grinding." Journal of Manufacturing and Materials Processing 5, no. 1 (2021): 4. http://dx.doi.org/10.3390/jmmp5010004.

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Continuous generating gear grinding with vitrified grinding worms is an established process for the hard finishing of gears for high-performance transmissions. Due to the increasing requirements for gears in terms of power density, the required surface roughness is continuously decreasing. In order to meet the required tooth flank roughness, common manufacturing processes are polish grinding with elastic bonded grinding tools and fine grinding with vitrified grinding tools. The process behavior and potential of the different bonds for producing super fine surfaces in generating gear grinding have not been sufficiently scientifically investigated yet. Therefore, the objective of this report is to evaluate these potentials. Part of the investigations are the generating gear grinding process with elastic bonded, as well as vitrified grinding worms with comparable grit sizes. The potential of the different tool specifications is empirically investigated independent of the grain size, focusing on the influence of the bond. One result of the investigations was that the tooth flank roughness could be reduced to nearly the same values with the polish and the fine grinding tool. Furthermore, a dependence of the roughness on the selected grinding parameters could not be determined. However, it was found out that the profile line after polish grinding is significantly dependent on the process strategy used.
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Denkena, Berend, M. Reichstein, and F. Catoni. "Dressing of Vitreous Bonded Wheels for Continuous Generating Grinding of Gears." Key Engineering Materials 291-292 (August 2005): 201–6. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.201.

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Grinding is a final step in the production chain of gears and therefore determines the quality of the product. In the industrial practice gears are cut - generally by means of a hobbing process - and their surface is hardened through a heat treatment, which has the target of increasing the wear resistance of the tooth flanks. Grinding is therefore necessary to remove the material distortions originating during the heat treatment and to fulfill dimensional and quality requirements. Usually only gears with high quality requirements are ground. Otherwise grinding is not carried out to reduce the production costs. In the recent years however the percentage of ground gears has been growing continuously due to the rising demands on load capacity, quiet running and life time as well as the increasing performance offered by the grinding processes. Generating grinding by means of cylindrical grinding worms shows the highest potential among the existing processes for gear grinding due to the high material removal performance that can be achieved. In order to use dressable worms efficiently the dressing technology has to be optimized. The present contribution describes the technology for dressing vitreous bonded grinding worms. This process is based on the use of form dressing rollers by means of which the grinding worm geometry and topography are generated. The investigations are aimed at analyzing the influence of the dressing parameters, in particular the speed ratio between dressing and grinding tool, and the attainable gear quality and surface properties. The results show significant dependencies between the dressing strategy and the grinding results.
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Ophey, Matthias, Christoph Löpenhaus, and Fritz Klocke. "Influence of Dressing Tool Specification on Dressing Tool Wear for Generating Gear Grinding." Advanced Materials Research 1140 (August 2016): 228–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1140.228.

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One research objective for generating gear grinding is to increase economic efficiency and productivity of the process. Furthermore, the gear quality must be equal or higher compared to the non optimised process. In addition to the grinding process and the grinding tools, the dressing process can be suitable to lead to an increase of efficiency of generating gear grinding. Due to the variety of dressing tool specifications process users have the problem of selecting the best fitting dressing tool for their demands. Therefore, it is necessary to know the interactions of dressing tool specification and dressing tool wear. But the influence of the dressing tool specification onto dressing tool wear has yet not been sufficiently investigated for generating gear grinding.
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Huang, Yin Hui, and Liu Lei. "Spiral Involutes and its Application in Gear Transmission." Advanced Materials Research 228-229 (April 2011): 106–13. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.106.

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Involute helical gears mesh based on the intersections of involute helicoids. However, spiral involutes on the tooth surface do not participate in meshing directly. A new type of gear drive, the spiral involute gear drive is proposed that works on contact of spiral involutes. The generation of tooth profile is introduced in detail. Through relative-stagnation method spiral involutes prove to have conjugation characteristics. To testify whether the transmission ratio of cylindrical spiral involute gears is constant, simulation is implemented in commercial codes ADAMS based on solid models of a pair of spiral involute gears. The computed results show that this novel gear drive can achieve a constant transmission ratio. Due to transmission with uniform velocity, cylindrical spiral involute gears can be used in transmission between intersecting axes, so that generating milling and generating grinding can be achieved.
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Ren, Zhong Yi, and Bi Qiong Jiang. "Disk Form Grinding Wheel 3D Parametric Modeling of Quadruple-Arc Gear Based on OpenGL." Advanced Materials Research 753-755 (August 2013): 1258–61. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.1258.

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Arc-gear tooth profile is complex, especially quadruple-arc gear, it cant be grinding by generating method, form grinding method is still has some difficult in wheel dressing. In this article, the author use software VC++6.0 and OpenGL developed a new and special gear software, when the tooth number and modulus of arc-gear to be machined and grinding wheel diameter is given, this software can generate disk form grinding wheel 3D model,this software is useful to arc-gear form grinding wheel dressing.
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Liu, Chien-Sheng, and Yang-Jiun Ou. "Grinding Wheel Loading Evaluation by Using Acoustic Emission Signals and Digital Image Processing." Sensors 20, no. 15 (2020): 4092. http://dx.doi.org/10.3390/s20154092.

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In the manufacturing industry, grinding is used as a major process for machining difficult-to-cut materials. Grinding is the most complicated and precise machining process. For grinding machines, continuous generating gear grinding machines are widely used to machine gears which are essential machine elements. However, due to its complicated process, it is very difficult to design a reliable measurement method to identify the grinding wheel loading phenomena during the grinding process. Therefore, this paper proposes a measurement method to identify the grinding wheel loading phenomenon in the grinding process for continuous generating gear grinding machines. In the proposed approach, an acoustic emission (AE) sensor was embedded to monitor the grinding wheel conditions; an offline digital image processing technique was used to determine the loading areas over the surface of Al2O3 grinding wheels; and surface roughness of the ground workpiece was measured to quantify its machining quality. Then these three data were analyzed to find their correlation. The experimental results have shown that there are two stages of grinding in the grinding process and the proposed measurement method can provide a quantitative grinding wheel loading evaluation from the AE signals online.
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Li, Ping, and Bang Jun Wang. "Analysis of Grinding Angle Based on Grinding Machine." Advanced Materials Research 411 (November 2011): 130–34. http://dx.doi.org/10.4028/www.scientific.net/amr.411.130.

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The value of grinding angle of grinding machine directly affects working efficiency and processing precision of gear grinding machines. A mathematical model of Generating Motion is established by analyzing and studying working principle and machining processes of the grinding machine. Equations of Generating Motion had been determined when the grinding machine was working. Then the relationship between grinding angle and Generating Motion was gotten and the optimal value of the grinding angle was finally obtained.
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Dissertations / Theses on the topic "Generating gear grinding"

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Domare, Emma. "Generating gear grinding : An analysis of gringing parameters's effect on gear tooth quality." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68637.

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Generating gear grinding is a method used for hard machining of gearbox gears. It facilitates a productive gear manufacturing with tight tolerances regarding surface roughness and geometrical accuracy. However, if the grinding is done with incorrect parameters, so called grinding burns can arise with consequences such as changes in surface hardness, changes in residual stress levels, surface embrittlement and compromised fatigue strength. This thesis investigates the gear tooth quality resulting from grinding parameters contributing to an improved grinding time. A literature study will cover gear geometries and material, grinding wheel properties, influences by grinding parameters and several verification methods. An experimental test will then be used to put four different grinding parameters to the test. The results showed that an increased cutting speed indicated finer surface roughness andincreased Barkhausen noise but showed no influence on gear geometry. Increasing both rough and fine feed rates resulted in a minor increase in geometry deviation but no significant difference in surface roughness. Large variations within the different verification method results related to grinding burns madeit difficult to draw conclusions regarding the experimental factors chosen. However, several factors apart from the experimental ones varied in the testing were believed to have significant influence, such as the flow of the cooling fluidand the amount of retained austenite from the carburizing process. In fact, the trends which seemed to be connected to these factors could be seen in both Barkhausen noise analysis, hardness measurementsand microstructure.
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Jermolajev, Štěpán. "Kontinuální odvalovací broušení čelního ozubení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230504.

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The diploma thesis deals with the technology of continuous generating gear grinding. With reference to this technology, used grinding wheels and grinding machines are described. A detailed analysis is devoted to the technological parameters of the grinding process and their influence on the resultant tooth flank surface integrity. In order to verify described rules, the diploma thesis contains results of practical experiments as well.
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Kimme, Simon. "Simulation des Wälzschleifens und dessen Einfluss auf die Flankentopografie und Verzahnungsakustik." Verlag Wissenschaftliche Scripten, 2018. https://monarch.qucosa.de/id/qucosa%3A71531.

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In der vorliegenden Arbeit wird ein Simulationsmodell entwickelt und validiert, welches die Hartfeinbearbeitung von Zahnrädern durch kontinuierliches Wälzschleifen abbildet. Dabei liegt ein besonderer Schwerpunkt auf der in fehlerbehafteten Prozessen erzeugten Flankentopografie und deren Bewertung hinsichtlich periodischer Strukturierung und des daraus resultierenden Einflusses auf den Drehfehler. Bei der Betrachtung verschiedener Prozessabweichungen zeigt sich eine starke Abhängigkeit der erzeugten Flankentopografien von verschiedenen Prozessparametern. Die simulativ erzeugten Flanken werden bezüglich periodischer Anteile der Strukturierung mit neuen Methoden analysiert und unter Berücksichtigung aller Zähne in einer Drehfehlersimulation hinsichtlich des Einflusses auf den Drehfehler bewertet. Zur Validierung des Simulationsmodells wird die Fertigung mit gezielter Schwingungsüberlagerung genutzt und Vergleiche sowohl bezüglich der erzeugten Flankentopografie als auch des Drehfehlers gezogen.:1 Einleitung 2 Stand der Wissenschaft und Technik 3 Ziel und Struktur der Arbeit 4 Analyse von periodisch strukturierten Zahnflankentopografien 5 Simulationsmodell 6 Simulationsergebnisse 7 Validierung anhand von Versuchen 8 Zusammenfassung und Ausblick<br>In this thesis a simulation model representing the hard fine machining of gears by continuous gear grinding is developed and validated. Special emphasis is put on the flank topography generated in faulty processes and its evaluation with respect to periodic structuring and the resulting influence on the transmission error in gear mesh. When considering different process deviations, a strong dependence of the generated flank topographies on different process parameters becomes apparent. The simulated flanks are analysed with new methods regarding periodic parts of the structuring and are evaluated in a gear mesh simulation regarding the influence on the transmission error, taking all teeth into account. For the validation of the simulation model, the manufacturing with targeted vibration superposition is used and comparisons are made with regard to the generated flank topography as well as the transmission error.:1 Einleitung 2 Stand der Wissenschaft und Technik 3 Ziel und Struktur der Arbeit 4 Analyse von periodisch strukturierten Zahnflankentopografien 5 Simulationsmodell 6 Simulationsergebnisse 7 Validierung anhand von Versuchen 8 Zusammenfassung und Ausblick
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OU, YANG JIUN, and 歐陽俊. "Analysis of Grinding Loading Phenomenon Using Acoustic Emission Sensor for Continuous Generating Gear Grinding Machine." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6rnkca.

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Chen, Wei-Liang, and 陳威良. "Study On The Tooth Surface Topology Error Of Gear Grinding Worm Due To Assembly Error Of Dressing Device On The Continuous Generating Gear Grinder." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/21531251463119485428.

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碩士<br>國立中正大學<br>機械工程系研究所<br>104<br>In modern industrial development, people also more and more attach this field of precision mechanical. Moreover, the gear grinding machine is no exception. Its advantages are grinding processing with high-precision and easily using tooth surface modification. Because generating gear grinding with grinding worm which is high efficiency by continuous indexing generating, it becomes extremely important in the market of high efficiency and high precision when enhance the machine tool precision. This content is about the accuracy of tooth and higher precision under high demand condition. Therefore, using gear grinding machine that provided by the industry to design and simulate dressing. By applying sensitivity analysis method, constructing flank topographic and discussing about the effects on gear grinding machine dresser system. After using the error sum of squares (SSE) screened to independent error coefficients establish sensitivity matrix. Using a pseudo inverse matrix (Pseudo-Inverse) method to obtain the error coefficient position at machine. Users not only can select their own coefficients that are within tolerance range but also do the action of adjust.
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Huang, Shih-huei, and 黃詩惠. "Study on the Tooth Profile Generation of the Gear Grinding Machine with Grinding Worm." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/72248326149395138588.

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碩士<br>國立中正大學<br>機械工程學系暨研究所<br>100<br>The generating gear grinding with grinding worm is a high efficiency gear tooth form finishing process by continuous indexing generating. 　　Mathematical model for the generation of the gear grinding machine is established according to the real gear grinder in this thesis. The motion of each axis in the mathematical model is derived according to the electronic gear box (EGB) function in the controller of grinder. Four specialized curve tables, which are used to make tooth flank modification, are also included in the mathematical model. 　　The developed simulation software can be applied to obtain the simulated ground surface which is generated with the machine settings of the real gear grinder. The result of this study is the basis of further study on the tooth profile modification.
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Chen, Gwan-Hon, and 陳冠宏. "Study on the Tooth Flank Modification of Cylindrical Gears Manufactured by the Continuous Generating Grinding Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/2ww8f8.

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博士<br>國立中正大學<br>機械工程系研究所<br>104<br>Tooth modified a ground helical gear is usually done on the modern gear finishing machine since the demand for assembly precision and smooth working. And using generated grinding machine is the most stable and efficient method. Modern gear grinding machine equipped with CNC dresser. In this paper, study on the modified gear tooth surface grinding by gear grinding machine and its dressing disk. Hence, we propose a tooth flank modified method for helical gears that uses a diagonal (combined tangential and axial) feed on a grinding machine with a variable grinding worm obtained by adjusting the axial, radial, and tangent feed of the dressing disk with respect to the rotating angle of the grinding worm. Since all the required corrective motions for the proposed multi-axis dressing method are existing CNC controlled axes on modern gear grinding machines, it can easily be implemented without extra cost to modify the grinder hardware. By setting the polynomial of multi-axis dressing grinding worm, polynomial of dresser profile, and polynomial of grinding feed. Then solve the coefficients of these polynomial with sensitivity analysis and singular value decomposition method are proposed and supplemented to modified work gear. This multi-axis dressing method not just correcting common twisted error in gear crowned tooth flank, more to control direction and magnitude of the twisted error. The three numerical examples used to validate the proposed method clearly show its ability to reduce or control tooth flank twisted error in crowned helical gear. We found that the gear pair have a better performance from the control of their twisted error.
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Book chapters on the topic "Generating gear grinding"

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Denkena, Berend, M. Reichstein, and F. Catoni. "Dressing of Vitreous Bonded Wheels for Continuous Generating Grinding of Gears." In Advances in Abrasive Technology VIII. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-974-1.201.

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Brecher, C., F. Klocke, M. Brumm, and F. Hübner. "Local simulation of the specific material removal rate for generating gear grinding." In International Gear Conference 2014: 26th–28th August 2014, Lyon. Elsevier, 2014. http://dx.doi.org/10.1533/9781782421955.466.

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Teixeira, P. H. O., C. Lopenhaus, C. Brecher, and T. Bergs. "Discretization of the contact conditions considering the grain engagement for generating gear grinding." In International Conference on Gears 2019. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023556-1739.

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Kai, X., and L. Guolong. "A compensation method of tooth surface error in continuous generating grinding based on the virtual-axis." In International Conference on Gears 2017. VDI Verlag, 2017. http://dx.doi.org/10.51202/9783181022948-1153.

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Conference papers on the topic "Generating gear grinding"

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Hübner, Florian, Fritz Klocke, Christian Brecher, and Christoph Löpenhaus. "Development of a Cutting Force Model for Generating Gear Grinding." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47424.

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One key component of powertrains is gears which are used in a continuously increasing quantity with improving quality. A productive process for finishing gears is the generating gear grinding process. The process is used mainly for large-batch production of small or mid-size gears after case hardening, especially in the automotive sector. Currently, the knowledge regarding the generating grinding process is limited and research is based mostly on empirical studies. The reasons for this are complex contacting conditions as well as the undetermined interactions between various process parameters. This paper focusses on current questions about generating gear grinding such as new approaches for a simulation based process design in consideration of cutting forces as well as the changing contact conditions.
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Guo, Hui, Ning Zhao, and Shuyan Zhang. "Generation Simulation and Grinding Experiment of Face-Gear Based on Single Index Generating Method." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12566.

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A mathmatical model of generating face-gear by grinding disk is developed. The influence of all kinds of errors of alignment and profile on face-gear flank deviation is considered and investigated in this model, such as offset error and pressure angle error of grinding disk, location error of virtual pinion axis. A optimization method for decreasing flank deviation is proposed. The corresponding correction parameters of machine which can be used for manufacturing face gear can be computed by this optimization method. In this method, the square sum of tooth surface deviation is taken to be the objective function. A grinding experiment of face-gear is performed on a CNC grinding machine with five degrees of freedom, and the tooth flank deviation is measured on gear measuring center. The flank deviation is very large due to some alignment errors in the beginning. When the grinding machine is adjusted by optimization computation results mentioned above, the measurement results show that the deviation of grinded face-gear flank is reduced substantially. The benefit is to improve the grinding quality of face-gear by this method.
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Tang, Jinyuan, Changjiang Zhou, and Changde Wu. "Studies on FEM Geometrical Model of Gear Machined by Pre-Grinding Hob With Protuberance." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34914.

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Conjugate curves are cut by the different parts of a pre-grinding hob with protuberance, appearing in subsection nonlinearly, which makes the combined fillet curves difficult to describe with explicit equations and makes the tooth profile complex. Due to the complex tooth profile, the general CAD/CAE methods of geometrical modeling and structure analysis are rarely applied in the strength calculation and transmission performance study. Based on the generating principle, conjugate curve equations of the gear, cut by the pre-grinding hob, are derived. These conjugate curves cut by the different parts of the hob are solved, compressed, linked and synthesized numerically, and then the shape of complex tooth profile are calculated exactly. Combined by strong numeric calculating performance of MATLAB and the facility of ANSYS’S APDL, compositely modeling program with MATLAB full-text data files and APDL is developed based, then FEM (Finite Element Method) geometrical model of tooth profile machined by pre-grinding hob accurately established. According to the built gear model, the relations of bending strength to grinding allowance are researched. The studies show that the grinding allowance of the optimum bending strength is not in allowance value recommended by the pre-grinding JB/T Standard 7968.1-95. The surface quality of gear ignored, less pre-grinding allowance usually leads to more optimal bending strength.
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Chengjie, Rui, Li Haitao, Yang Jie, Wei Wenjun, and Dong Xuezhu. "Research on Incomplete Design and Generating Theory of the Relief Surfaces of Dual-Cone Double Enveloping Hourglass Worm Gear Hob." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67051.

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The relief surfaces of the cutting teeth of a dual-cone double enveloping hourglass worm gear hob cannot be ground automatically until now because all of teeth have different profiles and different spiral angles with each other. The land width and the relief angle of the hob are two important factors when using the hob to hob a worm gear. In order to improve the precision of this type worm pair, the land width and the relief angle of the hob need to be machined accurately and effectively. For the purpose that the land width and the relief angle could be machined precisely, an incomplete design and generating theory of the relief surfaces of the dual-cone double enveloping hourglass worm gear hob is put forward in this paper. The mathematical model of the incomplete design and generating theory of the relief grinding of the hob is built. According to the model, a series of data of the motion parameters when grinding different points of the land edges of the different hob teeth are solved out. Using those data of the motion parameters on a four-axis hourglass worm-grinding machine, a machining simulation is built and the results of the simulation show that the relief surfaces of the hob can be ground continuously, and the land width and the relief angle are consistent with the design.
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Tan, Jie. "Face Gearing With a Conical Involute Pinion: Part 2 — The Face Gear: Meshing With the Pinion, Tooth Geometry and Generation." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/ptg-48038.

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Definition of the face gearing with a conical involute pinion starts with the basic rack. The pinion and the face gear are obtained as the result of true conjugate generation, with generating action described by the equation of meshing. The limiting conditions of undercutting, interference and pointing on the face gear tooth are determined. A new method is proposed for continuous generation of the face gear with an intermediate member, which, together with state of the art CNC technologies, allows practical grinding, hobbing or shaving of the face gear. A mathematical model is established which relates the basic plane, the pinion, the intermediate member and the face gear with true conjugate action, thereby determining the relative position and motion between any two of the four members. Design considerations are discussed. A numerical example is given.
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Nemcek, Milos, and Zdenek Dejl. "Geometric Calculations of the Chamfered Tip and the Protuberance Undercut of a Tooth Profile." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47305.

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Nowadays special modified tools are mostly used for rough or semi-finishing milling in the mass production of ground or shaved gears today. These modifications ensure the desired chamfer at the head or the undercut at the bottom of the gear tooth. Diameters of the beginning and the end of the operational involute (exact knowledge of them is necessary for the calculation of important meshing parameters) are found by using several techniques. The first one is the simulation of the generating action of a hob tooth using suitable graphic software with the subsequent measuring of these diameters from the envelope of hob tooth positions which was created. The second one is measuring directly on the gear manufactured using a measuring device. These simulations or measuring are often not performed and the tool with recommended parameters of the protuberance or the ramp is simply chosen by an educated guess [1]. But it is not an acceptable technique in a mass production (car industry). Standard DIN 3960 [2] gives a certain manual for the determination of these diameters. It suggests the iterative method for the calculation of the chamfer beginning circle diameter but without a reliable guideline. And as regards the protuberance, it refers to the correct calculation only in theory. This paper deals with the computing method to determine diameters of the beginning and the end of the function part of a tooth flank involute. It is designed for a specified tool with modifications for creating the chamfer or the protuberance undercut. The paper also takes into account the necessary shaving (grinding) stock or the backlash. Furthermore it refers to possible problems when the basic profile of the generating tool with the protuberance is designed from the basic rack tooth profile.
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Gonzalez-Perez, Ignacio, Alfonso Fuentes, Faydor L. Litvin, Kenichi Hayasaka, and Kenji Yukishima. "Application and Investigation of Modified Helical Gears With Several Types of Geometry." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34027.

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Involute helical gears with modified geometry for transformation of rotation between parallel axes are considered. Three types of topology of geometry are considered: (1) crowning of pinion tooth surface is provided only partially by application of a grinding disk; (2) double crowning of pinion tooth surface is obtained applying a grinding disk; (3) concave-convex pinion and gear tooth surfaces are provided (similar to Novikov-Wildhaber gears). Localization of bearing contact is provided for all three types of topology. Computerized TCA (Tooth Contact Analysis) is performed for all three types of topology to obtain: (i) path of contact on pinion and gear tooth surfaces; (ii) negative function of transmission errors for misaligned gear drives (that allows the contact ratio to be increased). Stress analysis is performed for the whole cycle of meshing. Finite element models of pinion and gear with several pairs of teeth are applied. A relative motion is imposed to the pinion model that allows friction between contact surfaces to be considered. Numerical examples have confirmed the advantages and disadvantages of the applied approaches for generation and design.
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8

Hongu, Junichi, Hiroki Noborio, Takao Koide, and Atsutaka Tamura. "Stylization for Gear Tooth Surfaces With Different Machining Processes Using Graphic Analysis." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97776.

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Abstract This study proposes a stylization method for gear tooth surface using slices of 2-dimensional spectrum. Focusing on a contour (or a slice in the z direction) of the curved surface generated by the 2-dimensinal spectrum, we could approximate the contour to a closed curve, and obtain the ‘scale’ parameter and the ‘shape’ parameter such as a radius, an aspect ratio, etc. which form the closed curve. To determine the flexibility of the proposed method for stylizing the surface texture of gear, this paper shows the approximating the 2-dimensional spectrums which are obtained by frequency analysis of the surface textures of gears with different machining processes using closed curve. As a result of the template matching using astroid, it was found that the astroid can approximate the contour of the 2-dimensinal power spectrum of the gear tooth surface with five machining processes, hob, generation grinding, form grinding, hone and barrel.
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9

Litvin, Faydor L., and David H. Kim. "Computerized Design and Generation of a Helical Gear Drive in Substitution of a Worm-Gear Drive." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0074.

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Abstract The design and generation of a gear drive formed by an involute helical gear and an involute worm is considered. Such a drive is applied as a low-power one in substitution of a conventional worm-gear drive. The authors have developed the geometry of the drive, simulated the meshing and contact via a computer program, and have developed the design of the grinding (cutting) wheel for generation of the worm. A numerical example is provided for illustration of the developed theory.
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10

Amini, Naser, and B. G. Rosén. "Surface Topography and Noise Emission in Gearboxes." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-3790.

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Abstract This paper, by the experimental investigation, deals with the effect of different surface topographies on noise generation in gears. Results from the noise assessment of one gear before and after honing are discussed. The honing operation was applied to the gear after the grinding. The gear was tested in an actual gearbox, operated in a test rig. Running conditions were systematically changed during the test; however, the same conditions were utilized for the gear before and after honing. The aim of the study was to identify the mechanism of the expected noise reduction, with surfaces being evaluated in 3D. The following results have been obtained: The total energy in the noise decreases significantly. The magnitude of the tooth-mesh frequency dose not change, but the level of its higher harmonics decreases significantly. These reductions are especially significant, when running at higher rotational speeds or when the applied torque is increased.
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