scholarly journals Aspects of the Internal Gear Honing Process

2018 ◽  
Vol 70 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Rares Lupas ◽  
Livia Dana Beju
Keyword(s):  
Experimental Study ◽  
Gear Tooth ◽  
Modern Method ◽  
Cylindrical Gears ◽  
Gear Honing ◽  
Geometric Precision ◽  
Surface Precision ◽  
Finishing Processes ◽  
Internal Gear ◽  
State Of Art

Abstract The paper analyzes the process of internal honing of cylindrical gears, a new and modern method of finishing the gear tooth flanks. At the beginning, the kinematics of the process is being analyzed. By realizing the state of art, we were able to identify the main features of the process, its advantages in terms of surface precision and quality, the residual stresses and the wear of the flanks compared with other finishing processes. An experimental study of the geometric precision, the shape of the flanks and the roughness for honed surfaces compared to the unfinished ones, highlighted the value and the need of this process.

Theoretic and Experimental Study on the Accuracy of Gears by Generative Electrochemical Mechanical Finishing

2011 ◽  
Vol 487 ◽  
pp. 268-272
Author(s):  
Gui Bing Pang ◽  
D.M. Li ◽  
Wen Ji Xu ◽  
X. Adayi ◽  
L. Yang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Gear Tooth ◽  
Dimensional Accuracy ◽  
Thickness Direction ◽  
Gear Teeth ◽  
Cylindrical Gears ◽  
Working Performance

Gears’ accuracy has important influences on its working performance and life. Electrochemical mechanical finishing (ECMF) was applied to finish cylindrical gears. The influence of the generative type of ECMF was studied theoretically and experimentally on the shape of gear teeth, and on the dimensional accuracy between teeth, and that in the tooth thickness direction. The results indicate that the generative type of ECMF can improve the accuracy between teeth, as well, the dimensional accuracy of gear tooth and that in the thickness direction may be also improved.

scholarly journals Experimental study of the contribution of gear tooth finishing processes to friction noise

2017 ◽  
Vol 115 ◽  
pp. 70-77 ◽  
Author(s):  
S. Jolivet ◽  
S. Mezghani ◽  
M. El Mansori ◽  
R. Vargiolu ◽  
H. Zahouani
Keyword(s):  
Experimental Study ◽  
Gear Tooth ◽  
Friction Noise ◽  
Finishing Processes

The Research on Tooth Profile Total Deviation Measuring Method Based on Coordination Measuring Machine

2012 ◽  
Vol 184-185 ◽  
pp. 789-792
Author(s):  
Bing Li ◽  
Yu Lan Wei ◽  
Meng Dan Jin ◽  
Ying Ying Fan
Keyword(s):  
Mathematical Model ◽  
Data Processing ◽  
High Precision ◽  
Gear Tooth ◽  
Measuring Method ◽  
Tooth Profile ◽  
Cylindrical Gears ◽  
Total Deviation ◽  
Measuring Machine

Put forward a method that use scatter points which got in different places to measure the involution cylindrical gears, give a mathematical model that use the discrete points to sure the total deviation of gear tooth profile. The experience results show that this way is of high precision in measurement points, measurement an error data processing less intervention, etc.

Meshing Stiffness and Tooth Root Stress for Internal Cylindrical Gears With Thin Rim

2003 ◽  
Author(s):  
Jean-Pierre de Vaujany ◽  
Miche`le Guingand ◽  
Didier Remond
Keyword(s):  
3D Model ◽  
Statistical Design ◽  
Tension Stress ◽  
Tooth Root ◽  
Meshing Stiffness ◽  
Cylindrical Gears ◽  
Maximal Tension ◽  
Experiment Method ◽  
Internal Gear ◽  
Root Stress

The main objective of this study is to quantify the influence of the deformation of the rim of an internal gear on the meshing stiffness and the stress distribution in tooth fillets. The 3D model used is based on a method derived from the Finite Prism Method. Tooth bending effects and contact deformations are processed simultaneously. Scientific use of the software has resulted in formulating an equation to calculate the maximal tension stress in the tooth root. This formula has been obtained by using the statistical design of experiment method.

Estimation of Gear Friction Coefficient using Directional Parameter of Tooth Surface

2021 ◽  
pp. 1-27
Author(s):  
Junichi Hongu ◽  
Ryohei Horita ◽  
Takao Koide
Keyword(s):  
Friction Coefficient ◽  
Contact Surface ◽  
Gear Tooth ◽  
Correction Term ◽  
Tooth Surface ◽  
Oil Film ◽  
Tooth Surfaces ◽  
Frictional Coefficients ◽  
Finishing Processes ◽  
The Relationship

Abstract This study proposes a modification of the Matsumoto equation using a directional parameter of tooth surfaces to adapt various gear finishing processes. The directional parameters of a contact surface, which affect oil film formations, have been discussed in the field of tribology; but this effect has been undetermined on the meshing gear tooth surfaces having directional machining marks. Thus, this paper investigates the relationship between the gear frictional coefficients and the directional parameters (based on ISO25178) of their tooth surfaces with the various finishing processes; and modifies the Matsumoto equation by introducing a new directional parameter to augment the various gear finishing processes. Our findings indicate that through optimizing the coefficient of the correction term the include the new directional parameter, the calculated friction values using the modified Matsumoto equation correlate more highly to the experimental friction values than that using the unmodified Matsumoto equation.

Experimental study of pin surface precision on lubrication behavior of pin–bush pairs in industrial roller chains

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ansheng Zhang ◽  
Mingyu Zhang ◽  
Jing Wang ◽  
Jianjun Zhang ◽  
Zhaohua Shang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Design Methodology ◽  
Industrial Applications ◽  
Experimental Basis ◽  
Reciprocating Motion ◽  
Content Type ◽  
Oil Supply ◽  
Machining Errors ◽  
Surface Precision ◽  
Straightness Error

Purpose The purpose of this paper is to study the influence of surface precision on the lubrication state of the roller chain under adequate and rare oil supply conditions, respectively. Design/methodology/approach The straightness error and roughness error of the pin generatrices were measured and the influence of surface precision on the lubrication behavior under steady state and reciprocating motion was studied through optical interference experiments. Findings The lubrication state is strongly influenced by the surface precision of the roller surface both under adequate oil supply and rare oil supply conditions. Originality/value In industrial applications, the machining errors of parts cannot be completely eliminated. Studying the influence of the surface precision on the lubrication behavior of pin–bush pairs can provide the experimental basis for the optimal design of the bush roller chains.

Manufacturing Process for Circular-Arc Curvilinear Cylindrical Gears with Predesigned Fourth Order Transmission Error

2010 ◽  
Vol 37-38 ◽  
pp. 623-627 ◽  
Author(s):  
Jin Zhan Su ◽  
Zong De Fang
Keyword(s):  
Fourth Order ◽  
Gear Tooth ◽  
Transmission Error ◽  
Circular Arc ◽  
Cylindrical Gears ◽  
Polynomial Curve ◽  
Order Polynomial ◽  
Tooth Surfaces ◽  
The Stability ◽  
Fourth Order Polynomial

A fourth order transmission error was employed to improve the stability and tooth strength of circular-arc curvilinear cylindrical gears. The coefficient of fourth order polynomial curve was determined, the imaginary rack cutter which formed by the rotation of a head cutter and the imaginary pinion were introduced to determine the pinion and gear tooth surfaces, respectively. The numerical simulation of meshing shows: 1) the fourth order transmission error can be achieved by the proposed method; 2) the stability transmission can be performed by increasing the angle of the transfer point of the cycle of meshing; 3) the tooth fillet strength can be enhanced.

Rating Gear Strength

1981 ◽  
Vol 103 (2) ◽  
pp. 516-527 ◽  
Author(s):  
G. Castellani ◽  
V. P. Castelli
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Gear Tooth ◽  
Correction Factors ◽  
Iso Standards ◽  
Gear Teeth ◽  
Root Parameters ◽  
Involute Gear ◽  
Tooth Form ◽  
Internal Gear

Synthetic formulas are written suitable to represent and compare the AGMA and ISO Standards for rating gear tooth strength. The corresponding tooth form and stress correction factors are compared for different kinds of involute gear teeth. A unified procedure is given to enable computing of the root parameters for teeth generated by any kind of tool which completes the ISO method, extending it to the case of shaped teeth. Both AGMA and ISO methods are also applied to the calculation of the aforesaid factors for internal gear teeth. In this case reliability is checked by finite element method. The comparison shows that research is necessary to review some items relating to calculation of stress correction factors.

The Deformation Analysis on Tooth Profiles with Electroplated CBN Hard Gear-Honing-Tools

2012 ◽  
Vol 426 ◽  
pp. 159-162 ◽  
Author(s):  
Man Dong Zhang ◽  
H.H. Zhao ◽  
Ming Lv
Keyword(s):  
Gear Tooth ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Deformation Analysis ◽  
Normal Deformation ◽  
Gear Honing ◽  
Important Means ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Exact Analytical Method

Using electroplating CBN hard gear-honing-tools with standard involute, the vicinity of the workpiece tooth pitch circle will be a “mid concave” error, the root of the tooth will be a “dig root” error generally. For the formation factors of the error are more complex, it is difficult to calculate errors with an exact analytical method. To this end, by using Pro/E and ANSYS software, the contact analysis of electroplating CBN hard honing process was simulated. The honed tooth surface normal deformation analysis was the important means to determine extent of tooth profile error, through the normal deformation analysis based on simulation results, the location and extent of normal deformation was determined. Practice shows that the location and extent of the normal deformation has been a certain relationship with processing gear tooth profile errors. It is provided a theoretical basis to make the gear-honing tooth surface modification as possible.

Probe Position Planning for Measuring Cylindrical Gears on a Four-Axis CNC Machine

2012 ◽  
Vol 579 ◽  
pp. 297-311
Author(s):  
Yi Hui Lee ◽  
Shih Syun Lin ◽  
Yi Pei Shih
Keyword(s):  
Mathematical Models ◽  
Gear Tooth ◽  
Experimental Result ◽  
Tooth Surface ◽  
Measuring Process ◽  
Profile Grinding ◽  
Cylindrical Gears ◽  
Large Size ◽  
Grinding Machine ◽  
Gear Profile

During large-size gear manufacturing by form grinding, the actual tooth surfaces will differ from the theoretical tooth surface because of errors in the clamping fixture and machine axes and machining deflection. Therefore, to improve gear precision, the gear tooth deviations should be measured first and the flank correction implemented based on these deviations. To address the difficulty in large-size gear transit, we develop an on-machine scanning measurement for cylindrical gears on the five-axis CNC gear profile grinding machine that can measure the gear tooth deviations on the machine immediately after grinding, but only four axes are needed for the measurement. Our results can serve as a foundation for follow-up research on closed-loop flank correction technology. This measuring process, which is based on the AGMA standards, includes the (1) profile deviation, (2) helix deviation, (3) pitch deviation, and (4) flank topographic deviation. The mathematical models for measuring probe positioning are derived using the base circle method. We also calculate measuring positions that can serve as a basis for programming the NC codes of the measuring process. Finally, instead of the gear profile grinding machine, we used the six-axis CNC hypoid gear cutting machine for measuring experiments to verify the proposed mathematical models, and the experimental result was compared with Klingelnberg P40 gear measuring center.

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