A precision generating hobbing method for face-gear based on worm hob

2016 ◽  
Vol 231 (6) ◽  
pp. 1057-1071
Author(s):  
Yan-zhong Wang ◽  
Liang-wei Hou ◽  
Zhou Lan ◽  
Can-hui Wu ◽  
Qing-jun Lv ◽  
...  
Keyword(s):  
Machine Tool ◽  
Production Efficiency ◽  
Control Method ◽  
Gear Tooth ◽  
Tooth Surface ◽  
Machining Accuracy ◽  
Analysis Model ◽  
Face Gear ◽  
Gear Hobbing ◽  
The Face

In order to improve the machining accuracy and production efficiency of face-gear, a method of face-gear generating hobbing by worm is provided in this paper. The principle of face-gear hobbing worm is analyzed, and the mathematical model of the worm is presented based on the principle and the theory of meshing. Taking the hobbing needs into account, the special machine tool is provided, and the movement control method of face-gear hobbing by the worm on the machine tool is proposed. The equation of face-gear tooth surface is calculated, and the 3-D model of face-gear is established based on CATIA software. To reduce the face-gear tooth profile errors induced by ratio errors, an error analysis model of face-gear hobbing is established. The experiment is carried out, and the completed specimen is detected by Coordinate Measuring Machining (CMM). The processing parameter is amended according to the tooth flank detection results, and the maximum normal deviation of the whole tooth surface of the face-gear specimen is improved from 243.2 µm to 61.0 µm. Experiment results demonstrate that the method of face-gear hobbing by worm is an effective approach to achieve the precision face-gear with high dimensional accuracy.

The Derivation and Simulation of Curved Tooth Face Gear Tooth Theoretical Contract-Point Trace Line Equations

2013 ◽  
Vol 819 ◽  
pp. 100-104
Author(s):  
Xue Yu Peng ◽  
Qing Li ◽  
Tai Yong Wang
Keyword(s):  
Gear Tooth ◽  
Theoretical Equation ◽  
Tooth Surface ◽  
Face Gear ◽  
Machining Errors ◽  
The Face ◽  
Trace Line ◽  
Contact Situation ◽  
Meshing Process ◽  
The Ideal

The face gear tooth surface theoretical equation, based on the mesh of curved tooth face gear and involute worm, was deduced by means of differential geometry, meshing theory and so on. According to the conditions of the gear meshing, studying the ideal contract-point trace line theoretical equation under the conditions of no machining errors, installation errors and so on. By solving the equations and simulating in SOLIDWORKS, finally the tooth contact situation of face gear and cylindrical worm in the meshing process was got.

Study on Designing and Dressing of Worm for Grinding Process of Face Gear

2011 ◽  
Vol 86 ◽  
pp. 475-478
Author(s):  
Xiao Zhen Li ◽  
Ru Peng Zhu ◽  
Zheng Min Qing Li ◽  
Fa Jia Li
Keyword(s):  
Gear Tooth ◽  
Tooth Surface ◽  
Grinding Process ◽  
Coordinate Systems ◽  
Face Gear ◽  
Dressing Method ◽  
Solid Models ◽  
The Face ◽  
Relationship Of ◽  
Envelope Theory

In order to process the hardened face-gear, the worm for face-gear is studied. The research includes designing and dressing method of worm. According to the meshing relationship of face-gear, worm and shaper, coordinate systems of face-gear, worm and shaper are established. By envelope theory, the face-gear tooth surface are obtained, worm tooth surface and shaper tooth surface. The solid models of face-gear, worm and shaper were built, and the approach of dressing was simulated for hardened face-gear processed.

scholarly journals Precise modeling of complex tooth surface microtopography and multi-degree-of-freedom nonlinear friction dynamics for high-performance face gear

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041988107 ◽  
Author(s):  
Shuai Mo ◽  
Jiabei Gong ◽  
Guoguang Jin ◽  
Shengping Zhu ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Gear Tooth ◽  
Time History ◽  
Surface Friction ◽  
Low Noise ◽  
Gear Transmission ◽  
Degree Of Freedom ◽  
Tooth Surface ◽  
Nonlinear Dynamic Model ◽  
Face Gear ◽  
The Face

Face gear transmission is a kind of space-meshing mechanism that is mainly used in the field of aviation. Compared with traditional transmission, it has the advantages of stability, reliability, low noise, and strong carrying capacity. However, owing to its complex tooth surface, there are no means to accurately model the face gear. Likewise, research based on the geometry is difficult. Therefore, the tooth surface equation of the face gear is derived in this article based on the meshing theory. Based on the equations, the point cloud of the face gear tooth surface is calculated, the complex tooth surface is generated, and the face gear is accurately modeled. Moreover, taking tooth surface friction excitation into consideration, a multi-degree-of-freedom nonlinear dynamic model of face gear transmission system is established, using the adaptive variable step length Runge–Kutta method. As shown in the results, the bifurcation diagram, phase diagram, time history diagram, and Poincaré section diagram are combined to analyze the influence of tooth surface friction and meshing frequency on the dynamic characteristics of the system.

Analysis of Tooth Surface Temperature Field and the Influencing Factors of Face Gear Driven

2012 ◽  
Vol 430-432 ◽  
pp. 1405-1411
Author(s):  
Guo Qi He ◽  
Hong Zhi Yan ◽  
Wei Hu ◽  
Tao Liang Shu
Keyword(s):  
Surface Temperature ◽  
Gear Tooth ◽  
Tooth Surface ◽  
Face Gear ◽  
Friction Heating ◽  
The Face ◽  
Instantaneous Temperature ◽  
Measurement Experiment ◽  
Gear Contact ◽  
Surface Temperature Field

According to the theory of heat transfer, it analyzed the calculating method of tooth friction heating in the process of face gear tooth meshing. It emulational analyzes the thermal coupling of the face gear with ANSYS/LS-DYNA, and extracts the state of each engaged positions in the meshing process, emulate the temperature distribution & temperature changing trends in the process of face gear tooth meshing. Through the temperature measurement experiment the face gear contact, it verifies the correctness of the emulation results. Simultaneously, it also analyzes the influence to the surface temperature of face gear of rotation and load, In the case of other conditions remain unchanged, low-speed is an effective way to prevent instantaneous temperature rise.

The Influence of Gear Hobbing on Worm Gear Characteristics

2005 ◽  
Author(s):  
V. Simon
Keyword(s):  
Computer Program ◽  
Machine Tool ◽  
Finite Number ◽  
Gear Tooth ◽  
Worm Gear ◽  
Tooth Surface ◽  
Design Parameters ◽  
Tooth Contact ◽  
Gear Hobbing

A method is presented for the determination of the influence of gear hobbing on the precision and loaded tooth contact of worm gears. In order to get a worm gear set with fully conjugated teeth surfaces the gear teeth should be processed by a hob whose generator surface is identical to the worm surface. This requirement can be achieved by the use of a hob whose diameter is equal to the worm diameter and with infinite number of cutting edges. But because of the teeth in the hob are relieved, the diameter of the new hob should be slightly larger than the worm diameter to provide tool life. On the other hand, because of the finite number of hob teeth, the gear tooth surface, manufactured by such a hob, is not a smooth surface; it consists of a relatively big number of small parts of helical surfaces formed by the cutting edges of the hob. In this paper a method is presented for the determination of differences between the gear tooth surface processed by an oversized hob of finite number of teeth or by a flying tool, and the theoretically required gear tooth surface. Also the influence of hob oversize and machine tool settings on tooth contact pressure and transmission errors is determined. The full geometry and kinematics of gear tooth processing by an oversized hob or by flying tool is included. The theoretical background is implemented by a computer program. By using this program, the influence of relevant design parameters of worm gear set and hob and of machine tool settings on processed gear tooth errors and on loaded tooth contact of the worm gear pair is investigated and discussed. By another computer program the influence of cutter diameter and machine tool settings for pinion teeth processing on tooth contact pattern in spiral bevel gears is investigated and presented.

The Influence of Gear Hobbing on Worm Gear Characteristics

2007 ◽  
Vol 129 (5) ◽  
pp. 919-925 ◽  
Author(s):  
Vilmos Simon
Keyword(s):  
Machine Tool ◽  
Gear Tooth ◽  
Theoretical Background ◽  
Worm Gear ◽  
Tooth Surface ◽  
Design Parameters ◽  
Tooth Contact ◽  
Transmission Errors ◽  
Gear Hobbing

In this paper, a method is presented for the determination of the differences between the worm gear tooth surface processed by an oversized hob of finite number of teeth or by a flying tool, and the theoretically required gear tooth surface. The influence of hob oversize and machine tool settings on tooth contact pressure and transmission errors is determined. The full geometry and kinematics of gear tooth processing by an oversized hob or by a flying tool is included. The theoretical background is implemented by a computer program. By using this program, the influence of relevant design parameters of the worm gear set and the hob and of machine tool settings on processed gear tooth errors and on loaded tooth contact of the worm gear pair is investigated and discussed.

Kinematic Study of the Face Gear

1990 ◽  
Author(s):  
Yih-Jen Dennis Chen
Keyword(s):  
Computer Program ◽  
Mathematical Description ◽  
Design Automation ◽  
Gear Tooth ◽  
Tooth Surface ◽  
Face Gear ◽  
Gear Drive ◽  
Face Width ◽  
Kinematic Study ◽  
The Face

Abstract This paper presents the kinematic study of the face gear drive system. The study includes three different configurations which are: (1) the on-center orthogonal face gear drive, (2) the on-center non-orthogonal face gear drive, and (3) the offset orthogonal face gear drive. The mathematical description for the gear meshing and the resulting face gear tooth surface is developed. This paper also presents the criteria for detecting the limitation of the effective face width due to tooth pointing and undercutting. The technique presented is applied to develop a computer program. This design automation tool allows visualizing the gear meshing and tooth geometry of the face gear drive.

Multistep Method for Grinding Face-Gear by Worm

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Yuansheng Zhou ◽  
Jinyuan Tang ◽  
Heng Zhou ◽  
Feng Yin
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Models ◽  
Gear Tooth ◽  
Original Method ◽  
Multistep Method ◽  
Tooth Surface ◽  
Contact Lines ◽  
Face Gear ◽  
Grinding Method ◽  
The Face

With the original worm grinding method to manufacture face-gear, the mathematical models of shaper, worm, and face-gear are established at the beginning. Subsequently, a problem of the original grinding method is illustrated that the working part of the face-gear tooth surface may not be covered completely. To overcome this problem, multistep grinding method for completely grinding the whole working part is proposed by studying contact lines of the tooth surface and singularities of the worm thread surface. The proposed method is verified in matlab with theoretical analysis. Finally, the simulations of the original method and the multistep method in the vericut software verify the feasibility and correctness of the proposed method. The study provides an effective and precise approach to grinding the face-gear.

Virtual Evaluation for Machine Tool Design

2008 ◽  
Author(s):  
Masahiko Mori ◽  
Zachary I. Piner ◽  
Ke Ding ◽  
Adam Hansel
Keyword(s):  
Machine Tool ◽  
Fluid Dynamic ◽  
Dynamic Performance ◽  
Digital Simulation ◽  
Machining Accuracy ◽  
Analysis Model ◽  
Simulation Accuracy ◽  
Theoretical Simulation ◽  
Physical Experiments ◽  
Static Rigidity

This paper presents the virtual machine tool environment Mori Seiki established for the evaluation of static, dynamic, and thermal performance of Mori Seiki machine tools. In this system environment, machining accuracy and quality are the main focus for each individual analysis discipline. The structural analysis uses the Finite Element Method (FEM) to monitor and optimize the static rigidity of the machine tool. Correlation between physical experiments and digital simulation is conducted to validate and optimize the static simulation accuracy. To accurately evaluate and effectively optimize dynamic performance of the machine tool in the virtual environment, the critical modal parameters such as damping and stiffness are calibrated based on experimental procedures which results in precise setup of the frequency response models. Computational Fluid Dynamic (CFD) analysis model is built in the environment so that the thermal perspective of the machine tool is evaluated and thermal deformation is monitored. This paper demonstrates compatibility of the digital simulation with physical experiments and success in integrating theoretical simulation processes with practical Mori Seiki machine tool development.

A new geometry definition and generation method for a face gear meshed with a spur pinion

2021 ◽  
pp. 095440542110609
Author(s):  
Xian-Long Peng
Keyword(s):  
Ruled Surface ◽  
Tooth Surface ◽  
Face Gear ◽  
Absolute Deviation ◽  
Numerical Examples ◽  
Gear Teeth ◽  
The Face ◽  
Geometry Feature ◽  
Tooth Flank ◽  
Straight Lines

The conventional tooth surface of a face gear is difficult to manufacture, and the cutter for the face gear cutting is not uniform even though the parameters of the pinion mating with the face gear slightly change. Based on the analysis of the geometry features of the tooth surface, a new developable ruled surface is defined as the tooth flank of the face gear, for which the most important geometry feature is that the flank could be represented by a family of straight lines, hence it could be generated by a straight-edged cutter. The mathematical models of the new ruled tooth surface, the cutter and the generation method are presented, the deviation between the ruled surface and the conventional surface, the correction of the ruled surface to reduce the deviation are investigated through numerical examples. The manufacturing process is simulated by VERICUT software, and the results demonstrate that even when the principle deviation is added to the machined deviation, the absolute deviation is on the micro-scale. The meshing and contact simulation shows that the new surface could obtain good meshing performance when the number of face gear teeth is greater than three times the number of pinion teeth. This research provides a new method for manufacturing face gears.

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