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VARIABLE INERTIAL DAMPER AND ITS APPLICATION IN ZERO-DRIVE GEAR HOBBING MACHINE 被引量:4
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作者 LIU Runai ZHANG Genbao GONG Li HUANG Qiang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第3期439-441,共3页
A variable inertial damper, whose viscous damping coefficient can be adjusted by changing the gap between inertia wheel and motor spindle, is designed in servomechanism of zero-drive hobbing machine and is directly at... A variable inertial damper, whose viscous damping coefficient can be adjusted by changing the gap between inertia wheel and motor spindle, is designed in servomechanism of zero-drive hobbing machine and is directly attached on the motor spindle. The mathematical model of servo system with inertial damper is built. By using theoretical analysis and system simulation, it is demonstrated that the variable inertial damper with optimal damping coefficient and moment of inertia should lead to no resonance point in wider frequency range of exciting force. Therefore, its application in zero-drive hobbing machine makes this system not only achieve higher system stiffness to overcome load torque fluctuation, but also gain better stability. 展开更多
关键词 Variable inertial damper Zero-drive gear hobbing machine System stiffness
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YKJ3180H Economy NC Gear Hobbing Machine
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作者 China Association of Machine ToolsIndustry 《China's Foreign Trade》 1996年第10期40-40,共1页
The YKJ3180H Economy NC GearHobbing Machine is a new variety,developed recently by the ChongqingMachine Tools Works to meet clients’demands. Its most prominent feature is its highproduction efficiency ( able to compl... The YKJ3180H Economy NC GearHobbing Machine is a new variety,developed recently by the ChongqingMachine Tools Works to meet clients’demands. Its most prominent feature is its highproduction efficiency ( able to complete awork cycle automatically), high processingprecision (Grade 7 or higher according to theGB 10095) and its cost competitiveness. This product is used in the machinetool and machinery industries at automobiles,tractors, gears and gear box factories. It canbe used for processing spur gears and helicalgears, automatic radial feed wormwheels,tapered gears and crowning gears; so it isespecially applicable in factories usingcrowning gear couplings, such as metallurgy,mining, lifting transport and the chemicalmachinery. 展开更多
关键词 NC YKJ3180H Economy NC gear hobbing machine
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Research and Development on NC System of Gear-hobbing Machine based on Zero-programming Technology
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作者 HUANG He LIU Fu-hua +2 位作者 FENG Guo-qun LIU Liang CHEN Qing-lin 《International Journal of Plant Engineering and Management》 2016年第4期241-254,共14页
By the analysis of roller gear processing technology, combining with gear meshing mechanism and motion relationship, models for rolling gear machining parameter and zero-programming are established. In this paper, the... By the analysis of roller gear processing technology, combining with gear meshing mechanism and motion relationship, models for rolling gear machining parameter and zero-programming are established. In this paper, the automatic generation technology of NC program for CNC gear machining process has been studied and the zero-programming system architecture of open CNC gear-hobbing machine has been presented. In the design and development of the system, human computer interaction, programming algorithm and the design of each function module have bean done. Application test shows that the expected design requirements have been achieved. 展开更多
关键词 CNC gear-hobbing machine zero-programming open CNC system development
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Cutting Force Fluctuation Suppression and Error Homogenization of Noncircular Gear Hobbing Based on the Tool Shifting Method
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作者 Dazhu Li Jiang Han +1 位作者 Xiaoqing Tian Lian Xia 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2023年第4期167-179,共13页
The current research on noncircular hobbing mainly focuses on the linkage model and motion realization.However,the intermittent cutting characteristics of hobbing would increase uncertainties in the manufacturing proc... The current research on noncircular hobbing mainly focuses on the linkage model and motion realization.However,the intermittent cutting characteristics of hobbing would increase uncertainties in the manufacturing process.In this paper,a hobbing machining model with tool-shifting characteristics was proposed to solve the problems of cutting force fluctuation and inconsistency of tooth profile envelope accuracy at different positions of the pitch curve in noncircular gear hobbing.Based on the unit cutting force coefficient method,the undeformed chip volume generated by interrupted cutting was used to characterize the fluctuation trend of the hobbing force.The fluctuation characteristics of the cutting force generated by different hobbing models were compared and analyzed.Using the equivalent gear tooth and hob slotting numbers,an analysis model of the tooth profile envelope error of the noncircular gear was constructed.Subsequently,the tooth profile envelope errors at different positions of the pitch curve were compared and analyzed based on the constructed model.The transmission structure of the electronic gearbox was constructed based on the proposed hobbing model,and the hobbing experiment was conducted based on the selfdeveloped noncircular gear CNC hobbing system.This paper proposes a hobbing method that can effectively suppress the fluctuation of the peak and whole circumference cutting force and reduce the maximum envelope error of the whole circumference gear teeth. 展开更多
关键词 Noncircular gear gear hobbing Cutting force Envelope error machining model
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CLASSIFICATION OF GEAR FAULTS USING HIGHER-ORDER STATISTICS AND SUPPORT VECTOR MACHINES 被引量:6
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作者 Lai Wuxing Zhang Guicai Shi Tielin Yang ShuziSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074, China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2002年第3期243-247,共5页
Gears alternately mesh and detach in driving process, and then workingconditions of gears are alternately changing, so they are easy to be spalled and worn. But becauseof the effect of additive gaussian measurement no... Gears alternately mesh and detach in driving process, and then workingconditions of gears are alternately changing, so they are easy to be spalled and worn. But becauseof the effect of additive gaussian measurement noises, the signal-to-noises ratio is low; theirfault features are difficult to extract. This study aims to propose an approach of gear faultsclassification, using the cumulants and support vector machines. The cumulants can eliminate theadditive gaussian noises, boost the signal-to-noises ratio. Generalisation of support vectormachines as classifier, which is employed structural risk minimisation principle, is superior tothat of conventional neural networks, which is employed traditional empirical risk minimisationprinciple. Support vector machines as the classifier, and the third and fourth order cumulants asinput, gears faults are successfully recognized. The experimental results show that the method offault classification combining cumulants with support vector machines is very effective. 展开更多
关键词 Support vector machine gear Fault diagnosis CUMULANT FEATUREEXTRACTION
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A precision generating hobbing method for face gear with assembly spherical hob 被引量:4
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作者 WANG Yan-zhong CHU Xiao-meng +3 位作者 ZHAO Wen-jun WANG Zhuo SU Guo-ying HUANG Yi-zhan 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第10期2704-2716,共13页
In order to improve the processing precision and shorten the hob manufacturing cycle of the face gear,a precision generating hobbing method for face gear with the assembly spherical hob is proposed.Firstly,the evoluti... In order to improve the processing precision and shorten the hob manufacturing cycle of the face gear,a precision generating hobbing method for face gear with the assembly spherical hob is proposed.Firstly,the evolution of the cylindrical gear to spherical hob basic worm is analyzed,then the spherical hob basic worm is designed,thus the basic worm and spiral angle equation of spherical hob are obtained.Secondly,based on the design method of the existing hob,the development method of the assembly spherical hob is analyzed,the cutter tooth and the cutter substrate of the assembly hob are designed,and the whole assembly is finished.Thirdly,based on the need of face gear hobbing,a numerical control machine for gear hobbing is developed,and the equation of the face gear is obtained.Fourth,for reducing the face gear processing errors induced by equivalent installation errors,the error analysis model is established and the impacts of each error on the gear tooth surface are analyzed.Finally,the assembly spherical hob is manufactured and the gear hobbing test is completed.According to the measurement results,the processing parameters of face gear hobbing are modified,and the deviation of tooth surface is significantly reduced. 展开更多
关键词 face gear spherical hob basic worm assembly spherical hob error analysis hobbing machine
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Mathematical Model and Machining Method for Spiral Flute Rake Faces of Hourglass Worm Gear Hob 被引量:1
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作者 YANG Jie LI Haitao +2 位作者 RUI Chengjie HUANG Yi ZHANG Xiaodi 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2019年第3期401-412,共12页
To improve the cutting performance of an hourglass worm gear hob and the accuracy of the resulting worm gear,the rake angles of the teeth on the pitch circle should be reduced.A method of forming the spiral flutes by ... To improve the cutting performance of an hourglass worm gear hob and the accuracy of the resulting worm gear,the rake angles of the teeth on the pitch circle should be reduced.A method of forming the spiral flutes by using a variable transmission ratio was developed.This method ensures that the rake angles on the indexing torus of each tooth are approximately 0°.Based on the gear meshing theory and the hourglass worm forming method,the discretization mathematical model of the rake face of a planar double enveloping worm gear hob was established by using cylindrical generating surface,and the feed parameters for machining the rake face for a variable transmission ratio were obtained.The spiral flute was simulated and the hob was machined on a four axis CNC milling machine.A contourgraph was used to measure the rake angle.The measurement results showed that the proposed method can reduce the absolute value of the rake angle on both sides of the cutting teeth,which can be used for machining the spiral flute rake face of an hourglass worm gear hob. 展开更多
关键词 HOURGLASS WORM gear hob cylindrical generating surface SPIRAL FLUTE RAKE face RAKE angle
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Virtual System Solution of CNC Machine for Spiral Bevel and Hypoid Gears 被引量:3
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作者 张威 王太勇 +1 位作者 熊越东 罗珺 《Transactions of Tianjin University》 EI CAS 2006年第5期373-377,共5页
A virtual computerized numerical control C CNC) processing system is built for spiral bevel and hypoid gears. The pre-designed process of the solution to locate the way of realization is investigated. A kind of combi... A virtual computerized numerical control C CNC) processing system is built for spiral bevel and hypoid gears. The pre-designed process of the solution to locate the way of realization is investigated. A kind of combined programming method and principle of solid modeling are chosen. Multienvironmental programming thought and the inter-connected mechanisms between different environments are applied in the proposed system. The problems of data exchange and compatibility of modules are settled. Environment of the system is founded with object oriented programming thought. AutoCAD is located as the graphic environment. Matlab is used for editing the computation module. Virtual C ++6.0 is the realization environment of the main module. Windows is the platform for realizing the multi-environmental method. Through establishing the virtual system based windows message handling mechanism and the component object model, the application of multienvironmental programming is realized in the manufacture system simulation. The virtual gear product can be achieved in the accomplished software. 展开更多
关键词 virtual machining simulation MANUFACTURE spiral bevel and hypoid gear multi-environmental programming
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STUDY ON WEAR AND DESTRUCTION OF HOB IN GEAR HOBBING
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作者 Liu Dawei Research Centre of Vehicle and Traffic Engineering, Qingdao University, Qingdao 266071, ChinaChen Jing Lu Shaofang Jilin University 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2002年第4期376-379,共4页
The wear and destruction appearances of hobs are researched. The reasons ofthe wear and destruction of hob are analyzed. And the influence of the change of the hobbing forceand the hobbing temperature on the wear and ... The wear and destruction appearances of hobs are researched. The reasons ofthe wear and destruction of hob are analyzed. And the influence of the change of the hobbing forceand the hobbing temperature on the wear and destruction of hob in gear hobbing is also analyzed. Ingear hobbing, the main wear mechanisms are adhesion and ploughing when cutting the 20CrMnTi gearusing W18Cr4V high-speed steel hob. 展开更多
关键词 gear hob gear hobbing wear and destruction wear mechanism
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Comparative Study of Novel Axial Flux Magnetically Geared and Conventional Axial Flux Permanent Magnet Machines 被引量:2
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作者 Mohammed F.H.Khatab Z.Q.Zhu +1 位作者 Hua-Yang Li Yue Liu 《CES Transactions on Electrical Machines and Systems》 2018年第4期392-398,共7页
In this paper,a performance comparison between the novel axial flux magnetically geared machines(AFMG)and the conventional axial flux YASA machine is presented.The AFMG and YASA machines have the same stator construct... In this paper,a performance comparison between the novel axial flux magnetically geared machines(AFMG)and the conventional axial flux YASA machine is presented.The AFMG and YASA machines have the same stator construction in which segments are equipped with concentrated windings to form the stator.However,the AFMG machine has two rotors with different pole-pair numbers.Magnetic gear effect can be obtained to increase the torque density.The performance comparisons at no-load and on-load conditions are then studied by 3D-finite element analysis(FEM).Moreover,both machines are prototyped,tested and compared. 展开更多
关键词 Axial flux magnetically geared machine finite element analysis performance comparison YASA machine
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Design and Machining of Combination Gear Cutter Hob
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作者 龚振起 常伟 龚海涛 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1997年第4期20-24,共5页
This paper takes the escapement plate of a mechanical pendulum clock as an example,analyses the design of combination form cutter hob for special profile gears, selection of parameters and calculation for tooth profil... This paper takes the escapement plate of a mechanical pendulum clock as an example,analyses the design of combination form cutter hob for special profile gears, selection of parameters and calculation for tooth profile coordinates and discusses the grinding of cutter hob tooth profile on optical contour grinder. 展开更多
关键词 Special profile gear ESCAPEMENT plate COMBINATION form CUTTER hob roughing TOOTH finishing TOOTH optical contour grinder
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Research on Applying Nano Cutting Oils in Spur Gear Hobbing Process
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作者 Tuan Ngo Vi Hoang Sinh Hoang 《World Journal of Engineering and Technology》 2017年第2期286-298,共13页
Nanolubricant mixing the normal lubricant with nanoparticles, gradually becomes a new trend study for metal cutting enhancement. An addition of the nanoparticles improves lubricating properties and convective heat tra... Nanolubricant mixing the normal lubricant with nanoparticles, gradually becomes a new trend study for metal cutting enhancement. An addition of the nanoparticles improves lubricating properties and convective heat transfer coefficient (cooling properties) of nanolubricants. In the present work, nanolubricant is formulated by using dispersions of 0.3% Al2O3 nanoparticles in normal industrial oil VG46 for enhancement of gear machining performance of SCM420 steel. Comparative study of flank wear, crater wear and gear profile error in gear hobbing with normal oils in the existing production line as well as nanolubricant is studied. This study clearly reveals that tool wear, and gear profile error are reduced by the use of nanolubricant compared to that of normal oils. The paper results not only contribute the deeper understanding of the novel performance of nanoparticles in conventional cutting fluids, but also show a very promising solution to achieve the engineering economy effectiveness in gear machining. 展开更多
关键词 gear hobbing CUTTING Fluid NANOFLUID Nanolubricant SCM420 Steel AL2O3
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YK 7425 GEAR GRINDING MACHINE
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《China's Foreign Trade》 1996年第11期61-61,共1页
This is a newly developed product,CNC gear grinding machine basedon original Y 7125 A large planargear grinding machine, produced by theQinchuan Machine Tool Works. It is chieflyused for grinding the involute tooth pr... This is a newly developed product,CNC gear grinding machine basedon original Y 7125 A large planargear grinding machine, produced by theQinchuan Machine Tool Works. It is chieflyused for grinding the involute tooth profilesof gear-shaping cutters, gear-shaving cuttersand master gears, and is also used for grindinghigh precision spur and helical gears. It issuitable for the departments of the automobiles,tractors, aircraft, machine tools and toolmanufacturing industries. 展开更多
关键词 CNC gear YK 7425 gear GRINDING machine
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Investigation of Nanofluids as Potential Cutting Fluids in Gear Hobbing Processes of AISI 4118 Steel
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作者 Hoang Vi Ngo Minh Tuan Tran The Long 《Journal of Mechanics Engineering and Automation》 2016年第4期180-185,共6页
The present work focuses on the performance of nanofluids called CN46-NanoAl2O3.80 formulated by using dispersions of nano aluminum oxide (Al2O3) in the ISO VG46 industrial oil on machining performance during gear h... The present work focuses on the performance of nanofluids called CN46-NanoAl2O3.80 formulated by using dispersions of nano aluminum oxide (Al2O3) in the ISO VG46 industrial oil on machining performance during gear hobbing of AISI 4118 steel. In machining gears, hobbing is one of the most important processes, especially to produce various gear shapes for adapting to diverse applications. However, the demand for high quality brings attention to product quality, particularly the roughness of the machined gear surface because of its effect on product appearance, function, and reliability. For additional improvement, applying nanofluids may produce superior product quality, as the rolling action of billions of nanoparticle units in the tool chip interface can significantly decrease the friction led to reduce the cutting forces. In addition, the characteristics of heat transfer of nanoparticles can contribute to reduce tool wear. In this experimental study, the performance of nanolubricant compared with the case of using ordinary cutting-fluid systems in the existing production line is investigated. The experimental results reveal that the tool life of the hob is significantly enhanced of 55.2%, gear surface roughness is smaller (27.3%), and gear accuracy is significantly increased by using the nanofluid. This result, therefore, shows a promising solution to achieve the engineering-economy effectiveness in gear machining. 展开更多
关键词 CN46-NanoAl2O3.80 gear hobbing gear surface roughness cutting fluid nanofluid.
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YKJS5132 Digital-controlled Gear Shaping Machine
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《China's Foreign Trade》 1997年第11期39-39,共1页
The YKJS5132 digitalcontrolled gear shaping machine is made by the Hubei Yichang Yangtze Machine Tool Plant. Its main features are: The major movement adopts a gear shift device for stepless speed readjustment The num... The YKJS5132 digitalcontrolled gear shaping machine is made by the Hubei Yichang Yangtze Machine Tool Plant. Its main features are: The major movement adopts a gear shift device for stepless speed readjustment The number of cut stroke can be preset. Crude or fine processing uses automatic gear shift. The feedehain is short and stable. The cycle movement 展开更多
关键词 CYCLE YKJS5132 Digital-controlled gear Shaping machine
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YM7132A——GEAR GRINDING MACHINE WITH CONICAL GRINDING WHEEL
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《China's Foreign Trade》 1996年第1期33-33,共1页
The YM7132A gear grindingmachine with a conical grindingwheel is used for grindingcylindrical spur and helical involutegears,especially for hardenedprecision gears of small andmedium sizes.
关键词 gear GRINDING machine WITH CONICAL GRINDING WHEEL YM7132A
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YK7232——GEAR GRINDING MACHINE WITH WORM GRINDING WHEEL
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《China's Foreign Trade》 1996年第1期33-33,共1页
The machine is used for precisiongrinding of hardened cylindricalgears with medium module inbatches for the industries ofaircraft,automobile,machine tool,gear box and various transmissiondevices.
关键词 gear GRINDING machine WITH WORM GRINDING WHEEL YK7232
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Y9420 Gear Chamfering Machine
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作者 China Association of Machine ToolsIndustry 《China's Foreign Trade》 1996年第10期40-40,共1页
Y9420 Gear Chamfering Machine is ahigh efficiency machine tool designedby the Chongqing Machine ToolsWorks to meet market demand. The machineemploys the principle of cool extrusion anduses a special chamfering tool wh... Y9420 Gear Chamfering Machine is ahigh efficiency machine tool designedby the Chongqing Machine ToolsWorks to meet market demand. The machineemploys the principle of cool extrusion anduses a special chamfering tool which drivesthe work piece to rotate and achievechamfering. It features no tool tracks and noburr on the ends. Multiple cutters can beused to process cluster gears, and thechamfering can be realized on either oneside of the tooth or on both. It is an idealpiece of equipment for automobiles, machinetools and gears manufacture to chamfer anddeburr disk type gears, spur and helical shaftgears and cluster gears. 展开更多
关键词 Y9420 gear Chamfering machine
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YK7250 Gear Grinding Machine With Worm-Grinding Wheel
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《China's Foreign Trade》 1997年第10期28-28,共1页
The YK7250 gear grinding machine with worm grinding wheel is manufactured by the Qinchuan Machine Tool Group Co., Ltd. in Baoji City, Shaanxi Province.
关键词 YK7250 gear Grinding machine With Worm-Grinding Wheel
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STUDY ON THE CUTTING TEMPERATURE IN GEAR HOBBING
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作者 Liu, Dawei Bai, Zhimin Guo, Hongqi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 1999年第2期63-68,共6页
According to work tool thermocouple principle,the equipment for measuring hobbing temperature is developed.The changing character of cutting temperature in gear hobbing,the relation between cutting conditions and hob... According to work tool thermocouple principle,the equipment for measuring hobbing temperature is developed.The changing character of cutting temperature in gear hobbing,the relation between cutting conditions and hobbing temperature,and the influence of cutting conditions on hobbing temperature are discussed by means of experiments.All these have provided the reference standards for the equitably selecting cutting conditions and geometrical parameter of hob,prolonging the life of gear hobs,and predicting processes of gear hobbing. 展开更多
关键词 gear hobbing Cutting temperature Cutting conditions
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