Transmission Errors and Noise of Spur Gears Having Uneven Tooth Profile Errors

1979 ◽  
Vol 101 (2) ◽  
pp. 268-273 ◽  
Author(s):  
I. Yuruzume ◽  
H. Mizutani ◽  
T. Tsubuku
Keyword(s):  
Testing Machine ◽  
Spur Gear ◽  
Tooth Profile ◽  
Spur Gears ◽  
Profile Error ◽  
Gear Noise ◽  
Transmission Errors ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Gear Rolling

The problems of involute spur gear noise and transmission errors are studied by meshing m3, 40z spur gears. Five kinds of tooth profile errors, such as convex, concave and wave-like, were formed on the test gear teeth by grinding. The value of each tooth profile error is divided into 3 grades, according to the Gear standards of JIS. Transmission errors of 15 test gears and a master gear were measured by a single flank gear rolling tester with a planetary gear system. Gear noise and strains near tooth fillets were measured by running these test gears on a gear noise testing machine with a power absorbing system, in an anechoic room. This paper presents experimental results and studies of the influence of tooth profile error forms on single flank rolling errors, situation of tooth contacts and gear noise while running.

Compact Design of High-Contact-Ratio Spur Gears

2020 ◽  
Author(s):  
Tuan H. Nguyen
Keyword(s):  
Spur Gear ◽  
Operating Parameters ◽  
Spur Gears ◽  
Bending Stress ◽  
Contact Ratio ◽  
Dynamic Design ◽  
Compact Design ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Root Stress

Abstract This study presents a computer simulation for the dynamic design of compact high-contact-ratio spur gear transmissions. High contact ratio gears have the potential to produce lower dynamic tooth loads and minimum root stress but they can be sensitive to tooth profile errors. The analysis presented in this work was performed by using the NASA gear dynamics code DANST (Dynamic Analysis of Spur Gear Transmissions). In the analysis, the addendum ratio (addendum/diametral pitch) was varied over the range 1.30 to 1.40 to obtain a contact ratio of 2.00 or higher. The constraints of bending stress limit and involute interference provide the main criteria for this investigation. Compact design of high-contact-ratio gears with different gear ratios and pressure angles was investigated. Comparison of compact design between low-contact-ratio and high-contact-ratio gears was conducted. With the same operating parameters, high-contact-ratio gears appear to have much more compact design than low-contact-ratio gears. For compact design of high-contact-ratio gears, a diametral pitch of 6.00 appears to be the best choice for an optimal gear set.

A Study on Reducing the Gear Tooth Profile Error by Finish Roll Forming

2003 ◽  
Author(s):  
Seizo Uematsu ◽  
Sung-Ki Lyu ◽  
Donald R. Houser ◽  
Ju-Suck Lim ◽  
Long Lu
Keyword(s):  
Gear Tooth ◽  
Tooth Profile ◽  
Roll Forming ◽  
Angle Error ◽  
Profile Error ◽  
Pressure Angle ◽  
Modification Factor ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Evaluation Parameters

This paper deals with the tooth profile error of spur gears that have been finished by roll forming. First, we present experimental data that confirms that the tooth profile error is a synthesis of a concave error and a pressure angle error. Since various types of tooth profile errors appear in the experiments, evaluation parameters are introduced for rolling gears so that profile quality may be objectively evaluated. Using these evaluation parameters, the relationship among the tooth profile error, the addendum modification factor (A. M. factor), and the tool loading force are verified. The character of concave error, pressure angle error and tool loading force of finish roll forming by using a forced displacement method are verified. This study makes clear that the tool loading force of finish roll forming is a very important factor that affects involute tooth profile error. The results of the experiment and analysis show that the proposed method reduces both concave and pressure angle errors.

The Influence of the Center-to-Center Distance on the Accuracy of the Serration with the New Gear Hob

2012 ◽  
Vol 217-219 ◽  
pp. 1908-1911
Author(s):  
Ling Li Jin ◽  
Feng He Ma ◽  
Fu Hua Peng
Keyword(s):  
Mathematical Model ◽  
Spur Gear ◽  
Tooth Profile ◽  
Gear Cutter ◽  
New Type ◽  
Set Up ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Profile Accuracy ◽  
Center Distance

A gear meshing mathematical model was set up according to the tooth profile normal line method. The influence of the gear cutter-workpiece center distance on the tooth profile accuracy was discussed in spur gear cutting using a new type of gear cutter, with the center distance errors being ±0.005, ±0.01, ±0.02 and ±0.04 respectively. The results show that the machined tooth profile errors at the root circle is less than 1μm, while errors at other parts of the tooth profile are even smaller.

Tooth Surface Fatigue of AISI9310 Steel Spur Gears

1992 ◽  
Author(s):  
H. Kotorii
Keyword(s):  
Service Life ◽  
Surface Hardness ◽  
Load Cycle ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Spur Gears ◽  
Gear Teeth ◽  
Surface Fatigue ◽  
Profile Errors ◽  
Tooth Profile Errors

Abstract With a JIS 0 class Spur Gears of AISI9310 steel, module 4, presure angle 25 degree tooth profile, the numbers of pinion teeth 21 / gear teeth 29 carburized and tooth surface hardness HRc 59, the relationships of the load and the service life (S-N) diagram were investigated by running test on the power-circulated type gear tester. MIL-L-23699 equivalent synthetic oil at 50° C were fed at a ratio of 0.8 l/min and circumferential velocity of 8.8 m/sec. Also the running performance of the gears, variation of tooth profile errors, affairs of damage, etc. were examined. Types of tooth surface fatigue mere scoring, spalling, or micropitting. A durability limit of Hertz-stress was assumed to be around 2GPa at the load cycle of 108.

Study on Tooth Profile Errors of Flexible Wheel Cold Rolling Machining

2012 ◽  
Vol 229-231 ◽  
pp. 2463-2466
Author(s):  
Xiang Hong Yang ◽  
Shu Zhong Lin
Keyword(s):  
Cold Rolling ◽  
Rolling Process ◽  
Tooth Profile ◽  
Contact Points ◽  
Optimization Of Process Parameters ◽  
Rolling Quality ◽  
Rolling Wheel ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Gear Rolling

The harmonic gear cold rolling process is an effective method to solve mass production. However, tooth profile quality problems greatly hinder the development of the process. Based on engagement theory, the dynamic characteristics of the rolling process and flexible wheel rolling tooth profile errors caused by the changes of the number of contact points were analyzed and studied, and the process methods were put forward to eliminate or reduce tooth profile errors in this paper, which has an important significance in analysis of rolling tooth profile errors, modification shape of the rolling wheel, optimization of process parameters and improvement of gear rolling quality.

Research on the theoretical tooth profile errors of gears machined by skiving

2016 ◽  
Vol 97 ◽  
pp. 1-11 ◽  
Author(s):  
Zheng Guo ◽  
Shi-Min Mao ◽  
Xiao-E Li ◽  
Zhong-Yi Ren
Keyword(s):  
Tooth Profile ◽  
Profile Errors ◽  
Tooth Profile Errors

An investigation into the effect of tooth profile errors on gear rattle

2010 ◽  
Vol 329 (17) ◽  
pp. 3495-3506 ◽  
Author(s):  
J.R. Ottewill ◽  
S.A. Neild ◽  
R.E. Wilson
Keyword(s):  
Tooth Profile ◽  
Profile Errors ◽  
Tooth Profile Errors ◽  
Gear Rattle
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