Relevant bibliographies by topics / Gear grinding modes

Contents

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

Academic literature on the topic 'Gear grinding modes'

Author: Grafiati
Published: 30 May 2022
Last updated: 19 July 2025

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Journal articles on the topic "Gear grinding modes"

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Novikov, Fedir, Volodymyr Polyanskyy, Oleksiy Yermolenko, Andrii Ivashura, and Oksana Yermolenko. "Improving the efficiency of gear grinding technology for mine conveyor drives." IOP Conference Series: Earth and Environmental Science 1348, no. 1 (2024): 012038. http://dx.doi.org/10.1088/1755-1315/1348/1/012038.

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Abstract The aim of this work is to develop a mathematical model of the gear grinding process using the method of high-performance profile copying and determine the optimal parameters of grinding modes according to the temperature criterion. It is shown that in order to ensure defect-free machining of gears under deep grinding conditions, it is necessary to significantly reduce the rate of the feed speed of the grinding wheel along the tooth of the gear wheel. For a grinding depth of 0.4 mm, it should be equal to 2.27 m/min. In this case, the machining productivity can be increased up to 5 tim
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Larshin, Vasily P., Olga B. Babiychuk, Oleksandr V. Lysyi, Serhii M. Verpivskyi, and Zhang Yunxuan. "Optimization of the precision gear grinding operation based on integrated information system." Herald of Advanced Information Technology 4, no. 4 (2021): 303–17. http://dx.doi.org/10.15276/hait.04.2021.2.

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In accordance with the principles of hierarchical management, a comprehensive two-level management system is presented for the development and manufacturing of products for the stages of pre-production (the upper level of the management hierarchy) and for the actual production stage (the lower level of the management hierarchy). At the stage of pre-production, the gear grinding operation design on the “MAAG” type machines was carried out. For this purpose, a technique for optimizing the gear grinding parameters for a two dish-wheel rolling scheme has been developed, a mathematical optimization
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Wang, Ya Hui, and Xiao Zhong Ren. "Dynamics Behaviors Analysis on the Column of Gear Grinding Machine." Advanced Materials Research 472-475 (February 2012): 1885–88. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.1885.

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Aiming at the issue on the development of gear form grinding machine, a method for analyzing the dynamic behaviors of the machine column was introduced. Based on the model of gear grinding machine developed before, a suitable finite element model of the column was established firstly. Modal analysis on the column was carried out by means of ANSYS software, and the first five natural frequencies and vibration modes of the column were obtained. According to the analysis results, some improvements on the original column structure were made. By comparing the static and dynamic behaviors of several
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Karavanova, A. G. "Selection of abrasive tools and cutting modes to improve the quality of gears and gear blocks." Glavnyj mekhanik (Chief Mechanic), no. 9 (September 4, 2023): 544–53. http://dx.doi.org/10.33920/pro-2-2309-03.

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The paper analyzes the advantages and disadvantages of tools for tooth grinding and tooth honing, the areas of their application are noted. The issues of correction and restoration of grinding wheels and hones are considered in detail, recommendations are given when choosing coolant and oils. It is noted that the accuracy and quality of gears and gear blocks depend on the correct choice of tools for finishing operations. A comparative analysis of the effect of the processing method on the surface quality of the teeth is carried out.
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Vorozhcova, Natal'ya, Vladimir Makarov, Aleksandr Gorbunov, and Elena Kolganova. "TECHNOLOGICAL CAPACITY UPDATING OF CONTINUOUS RUN-IN GEAR GRINDING METHOD." Bulletin of Bryansk state technical university 2021, no. 5 (2021): 15–22. http://dx.doi.org/10.30987/1999-8775-2021-5-15-22.

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The work purpose consists in the technological capacity updating of the method for cog-wheel continuous run-in gear grinding based on the purpose of efficient modes and characteristics of the worm disk. 
 The investigation methods are based on mathematical modeling and planning experiments. Machining aircraft cylindrical cog-wheels and special samples was carried out on modern NC machines, benches and plants with the use of up-to-date test equipment: coordinate inspection machine KIM R-100 “Klingelnberg”, profile meter MarSurf M300S “Mahr”, optical microscope Axiovert 400MAT “Zeiss”, elec
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Gorla, Carlo, Francesco Rosa, Edoardo Conrado, and Horacio Albertini. "Bending and contact fatigue strength of innovative steels for large gears." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 14 (2014): 2469–82. http://dx.doi.org/10.1177/0954406213519614.

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Large gears for wind turbine gearboxes require high performances and cost-effective manufacturing processes. Heat distortion in the heat treatment phase and the consequent large grinding stock are responsible for high manufacturing costs due to reduced productivity. A research project aimed at the identification of new materials, manufacturing and heat treatment processes has been performed. Air quenchable alloy steels, combined with a specifically developed case hardening and heat treatment process, have been identified as an interesting solution, both from the point of view of cost effective
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Клепиков, Виктор, Viktor Klyepikov, Александр Черепахин, and Alyeksandr CHyeryepakhin. "Optimization of spline hole broach processes and grinding of cylindrical surfaces in hardened cog-wheels." Science intensive technologies in mechanical engineering 1, no. 8 (2016): 32–36. http://dx.doi.org/10.12737/20813.

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One of the factors affecting considerably gear cutting accuracy consists in technological basis quality. The largest influence upon treatment accuracy of a reference hole have broach wear and errors in hole grinding. In the paper there are shown the investigation results of technological parameter effect upon broach stability and accuracy in broach treatment and grinding of a reference splined hole. The developed model of a process and a tool test allowed defining optimum parameters from the point of view of the treatment accuracy, surface layer parameters and life of a tool and cutting modes.
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Tonkonogyi, Volodymyr, Oleksiy Yakymov, Liubov Bovnegra, and Fеdir Nоvikоv. "SURFACE TEMPERATURES AND VACATION BURNS OCCURRING DURING GRINDING OF CEMENTED GEARS WITH TWO DISHED WHEELS ON DIFFERENT PARTS OF THE MACHINED INVOLUTE PROFILE." Cutting & Tools in Technological System, no. 99 (November 21, 2023): 119–39. http://dx.doi.org/10.20998/2078-7405.2023.99.12.

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To increase grinding productivity with the provision of specified physical and mechanical properties of the surface layer of the surface layer of the processed part it is necessary to know the temperature on the surface of the workpiece, since its value depends on the depth of the defective surface layer. In the work theoretically justified the difference of surface temperatures in the initial (at the base), in the middle (on the dividing circle) and final (at the top) points of involute profile of the gear tooth when grinding with two disc wheels on the zero scheme. The difference in temperat
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Safarov, Damir, Aleksey Kondrashov, and Ayrat Fashudtinov. "TOOTH LEG EXCESSIVE UNDERCUT ELIMINATION IN HELICAL CYLINDRICAL GEARS WITH PROTUBERANCE OF HOBBING CUTTER BASED ON GRAPHIC RUN-IN." Bulletin of Bryansk state technical university 2021, no. 7 (2021): 19–27. http://dx.doi.org/10.30987/1999-8775-2021-7-19-27.

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In the paper there are considered procedures for designing a transition curved tooth leg of helical cylindrical gears. A significant parameter of a transition curve is a diameter of boundary points. The boundary point diameter belongs to a bottom point of the involute profile of the teeth side surface of a gear ring. The boundary point position must be lower of the design end point of the involute profile defined by the designer of gearing. A diameter value depends upon a great number of production factors: a profile and wear of a grinding disk, setting up parameters, teeth machining modes of
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Zhang, Yikun, and Yongping Liu. "Simulation of VERICUT-based Generating Grinding of Involute Beveloid Gears." Academic Journal of Science and Technology 5, no. 2 (2023): 74–78. http://dx.doi.org/10.54097/ajst.v5i2.6285.

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Based on the principle of generating grinding, VERICUT is used for generating grinding of involute beveloid gears. Firstly, the tooth surface equation of the involute beveloid gears is derived according to the principle of involute beveloid gears forming and gear meshing theory, and the theoretical model of the involute beveloid gear is established; secondly, the CNC conical gear grinding machine model, grinding wheel tool model and tooth blank are built in UG and imported into VERICUT, and the CNC machining program of the generating grinding is written to carry out the generating grinding sim
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Dissertations / Theses on the topic "Gear grinding modes"

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Ліщенко, Наталя Володимирівна. "Підвищення продуктивності профільного зубошліфування на верстатах з ЧПК на основі адаптації елементів технологічної системи". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37663.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.02.08 – технологія машинобудування. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018. Дисертація присвячена рішенню важливої науково-технічної проблеми підвищення продуктивності бездефектного профільного зубошліфування на верстатах з ЧПК на основі розробки відповідних технологічних передумов та підсистем проектування, моніторингу і технологічної діагностики операції, які дозволяють виконувати адаптацію елементів технологічної системи до більш високої продуктивності. Для ц
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Ліщенко, Наталя Володимирівна. "Підвищення продуктивності профільного зубошліфування на верстатах з ЧПК на основі адаптації елементів технологічної системи". Thesis, Одеська національна академія харчових технологій, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37665.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.02.08 – технологія машинобудування. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018. Дисертація присвячена рішенню важливої науково-технічної проблеми підвищення продуктивності бездефектного профільного зубошліфування на верстатах з ЧПК на основі розробки відповідних технологічних передумов та підсистем проектування, моніторингу і технологічної діагностики операції, які дозволяють виконувати адаптацію елементів технологічної системи до більш високої продуктивності. Для
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Jiang, Yue-fong, and 蔣岳峰. "A STUDY ON THE MATHEMATICAL MODEL OF A FIVE-AXIS CNC GEAR PROFILE GRINDING MACHINE." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/x4hmk4.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>98<br>There are three methods for finishing cylindrical gears, finish hobbing, finish shaving, and finish grinding. Grinding processes can be further divided into two types: form grinding and generating grinding. In the form grinding process, it is the line contact between the grinding wheel and the gear surface. In addition, because of advances in higher efficiency and easier way to achieve the purpose of flank correction through the wheel modification, compared with the generating grinding process, the form grinding is suitable for gears with large-size and large-m
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Hsieh, Tung-Han, and 謝東翰. "Mathematical Model of The Six-Axis CNC Machine for Grinding Cutting Tools of Hypoid Gear." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/76722477212121657892.

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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>103<br>This paper aims at building a mathematical model of the six-axis CNC machine for grinding cutting tools of hypoid gear, is based on the Oerlikon’s grinding machine, and input STL file to build the model of machine on VERICUT 7.3, and verify the mathematical model of cutting edge which derived by Lee, Yi-Hui, the student from Department of Mechanical Engineering of National Chung Cheng University. Using Mathematica 9.0 output point data of cutting edge to check the positions; input the designed parameters to calculated the displacement and angle, and simulat
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GUO, YI-YU, and 郭憶妤. "Development an outsourcing selection model based on manufacturing time and process quality - A case study of grinding process of gear." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/pespm4.

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碩士<br>國立勤益科技大學<br>工業工程與管理系<br>105<br>Small and medium-sized enterprises are up to 95% of machinery industry in Taiwan, it shows that they developed professional job assignment and formed industrial clusters. But facing intense economic competition, manufacturers must improve production flexibility and respond quickly to the market for satisfying customers' needs. In that case outsourcing is one of manufacturers' common way to improve production efficiency. Therefore, this paper will construct the outsourcing vendor selection matrix by a case study of grinding process of gear, because the gear
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Book chapters on the topic "Gear grinding modes"

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Rajaei, Ali, Marco Becker, Yuanbin Deng, et al. "Materials in the Drive Chain – Modeling Materials for the Internet of Production." In Internet of Production. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-98062-7_23-1.

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AbstractIn this chapter, the focus lies on a predictive description of the material response to the thermomechanical loads within different process steps by means of physical and data-driven models. The modeling approaches are demonstrated in examples of innovative production technologies for components of a drive chain: Fine blanking of parts; powder metallurgical (PM) production of gears; open-die forging and machining of drive shafts. In fine blanking, material, process, and quality data are acquired to model interactions between process and material with data-driven methods. Interpretable machine learning is utilized to non-destructively characterize the initial material state, enabling an optimization of process parameters for a given material state in the long-term. The PM process chain of the gear includes sintering, pressing, surface densification, case hardening, and finishing by grinding. Several modeling and characterization approaches are applied to quantitatively describe the microstructure evolutions in terms of porosity during sintering, density profile after cold rolling, hardness and residual stresses after heat treating and grinding and the tooth root load bearing capacity. In the example of the open-die forging, a knowledge-based approach is developed to support the decision-making process regarding the choice of the proper material and optimized pass schedules. Considering the microstructure of the forged shaft, the elastoplastic material behavior is described by a dislocation-based, multiscale modeling approach. On this basis, process simulations could be carried out to predict the process forces, chip form, residual stresses, and the tool life among other output data.
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Rajaei, Ali, Marco Becker, Yuanbin Deng, et al. "Materials in the Drive Chain – Modeling Materials for the Internet of Production." In Internet of Production. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-44497-5_23.

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AbstractIn this chapter, the focus lies on a predictive description of the material response to the thermomechanical loads within different process steps by means of physical and data-driven models. The modeling approaches are demonstrated in examples of innovative production technologies for components of a drive chain: Fine blanking of parts; powder metallurgical (PM) production of gears; open-die forging and machining of drive shafts. In fine blanking, material, process, and quality data are acquired to model interactions between process and material with data-driven methods. Interpretable machine learning is utilized to non-destructively characterize the initial material state, enabling an optimization of process parameters for a given material state in the long-term. The PM process chain of the gear includes sintering, pressing, surface densification, case hardening, and finishing by grinding. Several modeling and characterization approaches are applied to quantitatively describe the microstructure evolutions in terms of porosity during sintering, density profile after cold rolling, hardness and residual stresses after heat treating and grinding and the tooth root load bearing capacity. In the example of the open-die forging, a knowledge-based approach is developed to support the decision-making process regarding the choice of the proper material and optimized pass schedules. Considering the microstructure of the forged shaft, the elastoplastic material behavior is described by a dislocation-based, multiscale modeling approach. On this basis, process simulations could be carried out to predict the process forces, chip form, residual stresses, and the tool life among other output data.
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Rasulov, Nariman, Arastun Mammadov, Mursal Alakbarov, and Elgun Shabiyev. "The Issues of Improving Surface Quality and Productivity in the Grinding with Copy Method of Shaped and Tooth Surfaces." In Advances in Grinding - Recent Trends and Applications [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004849.

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Grinding of machine and responsible equipment parts, gear surfaces with various purpose shapes provided in the construction of tools, as well as gear surfaces provide high processing accuracy and productivity. At this time, the positioning angles of the elemental regions of the workpiece to be grinded in the cutting zone differ from each other, the actual cutting depth varies along the shaped profile, and due to inheritance, similar processing errors occur on the grinded surface, processing efficiency is not ensured. In this work, the mechanism of the change of cutting depth during grinding of shaped surfaces by copying is investigated, the direction of ensuring its maximum regularity along the shaped profile is determined, the issue of improving the quality and efficiency of grinding is solved by using the technological possibilities of the operation, despite the reduction of the number of working trips, grinding should be carried out in relatively light modes and it is possible to ensure similar quality of grinding. By placing the tooth of the gear to be grinded at an angle the roughness of the processed surfaces during grinding is smaller compared to tooth grinding with the existing method and the quality is correspondingly high.
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Zhao, Liyuan, Yu Xue, Xiaonan Wang, Qingyu Zhang, and Xinjunan Shen. "Study on the Issue of Tooth Root Step After Gear Grinding." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220451.

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Gear transmission is the most widely used transmission form in shearer. It has the characteristics of accurate transmission, high efficiency, compact structure, safe and reliable work, long service life and so on. The manufacturing level of gears also reflects the technical level of an enterprise producing shearers. With the development of shearers to high-power models, gear transmission is also developing in the direction of high precision, large load-bearing and long life. However, gears are subject to many factors such as load, working environment and so on. The tooth root of shearer is easy to be ground because the tooth root is not ground. The tooth root is discussed by analyzing the design of the Hob, the allowance of the retained grinding, the parameter setting of the gear grinder and the deformation of heat treatment. At the same time solving a major problem of how to avoid grinding the tooth root and grinding steps in the actual production of gears, and also lays a solid foundation for improving the service life of gears.
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Conference papers on the topic "Gear grinding modes"

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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
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Jin, Tan, Jun Yi, and Rui Cai. "Investigation on the Grinding Force, Power and Heat Flux Distributions Along the Tooth Profile in Form Grinding of Gears." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8707.

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This paper investigates the distributions of grinding force, power consumption and heat flux along the tooth profile in precision form grinding of gears. A semi-analytical grinding force model has been established considering the static and dynamic chip formation forces and also the sliding force. Variation of the local contact conditions between the wheel and gear flank along the gear tooth profile, including the local depth of cut, local wheel diameter, local wheel speed and also the equivalent wheel diameter has been analyzed. Combining the variation of local contact conditions with the sem
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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
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Jolivet, S., S. Mezghani, M. El Mansori, and H. Zahouani. "Numerical Simulation of Tooth Surface Finish Effects on Gear Noise." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20575.

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Due to the rapid development of electric and hybrid motorisations, gear manufacturers have encountered an increasing need to create high level quality gear flanks. While the main goals are to increase the load-carrying capacity and the wear resistance, reducing gear noise has become more and more important. To answer this, macro- and micro-geometry defects have long been studied as well as their effect in amplifying the vibrations of gears. However, the impact of tooth flanks micro-scale roughness on gear noise has not well been studied and understood, even though the teeth surface contacts ar
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Kim, David H. "Simulation of Plunge Shaving Operation for Spur and Helical Gear, and Tooth Contact Analysis of Finished Gear Drive." 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-48032.

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A math model of the re-sharpening operation of shaving cutter by grinding disk, and the plunge shaving process for spur and helical gears has been developed. It has been achieved by three steps: a parametric representation of grinding disk surface, the derivation of shaving cutter surface as a function of grinding disk surface and re-sharpening motion parameters, and the derivation of the finished gear surface as a function of cutter surface and synchronized plunge shaving motion parameters. The study is complemented with a methodology of determining the bearing contact as a set of instantaneo
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Gorla, Carlo, and Francesco Rosa. "Form Grinding of Helical Gears: Effects of Disk Shaped Tools Plunging." 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-48093.

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Following the example of aerospace transmissions producers, nowadays, more and more industrial fields are interested in reducing transmission noise and vibration and in increasing operating life. This requires a precise understanding of the real transmission behavior since the first steps of the design process. The usual approach is to apply theoretical meshing loads and to compute web, rim and supporting structures deflections by one of the several available methods (i.e. Finite Element Method), in order to predict stresses and deformations. But these calculations usually neglect that deforma
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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
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Mayer, John E., Angie H. Price, Ganesh K. Purushothaman, and Sanjay V. Gopalakrishnan. "Specific Grinding Energy Causing Thermal Damage in Precision Gear Steels." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0703.

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Abstract Thermal damage (burn) in carburized and hardened precision gear steels caused by grinding was investigated. Excessive grinding temperatures cause grinding bum and result in excessive scrappage. AISI 9310 and X53 gear steels, used in helicopters and tilt-rotor aircraft, respectively, were prepared and heat-treated by a production partner. Grinding tests were conducted on these steels. Nital etching was used to detect grinding burn. Models were established to predict onset of thermal damage for AISI 9310 and X53 steels based on specific grinding energy determined from grinding force mea
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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
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Shu, Q. Y., Q. Y. Qiu, P. E. Feng, and L. Cao. "A Novel Error Detection and Compensation Method of Hourglass Worm Gear Hob." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88644.

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The double enveloping hourglass worm gear pair is a type of transmission, which has many traits, such as more teeth in mesh for transmission, higher contact quality, better lubrication condition and so on. Therefore, it has higher efficiency of transmission, stronger bearing capacity and longer work life. But the manufacturing difficulty of the worm gear hob has limited its popularization and application. Unlike the traditional worm gear hob which can use the principle of optical projection to detect the hob shaft section and compare with its mathematical model, currently, there is no standard
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