Results 41 to 50 of about 1,977,712 (188)

Meshing characteristics of variable hyperbolic circular-arc tooth trace cylindrical gears with cutter errors [PDF]

open access: yesMechanical Sciences
We investigate the relationship between cutter errors and meshing characteristics of the variable hyperbolic circular-arc tooth trace (VH-CATT) cylindrical gears. Firstly, based on the tooth surface forming principle, the tooth surface mathematical model
D. Ma, J. Long, Z. Zhu
doaj   +1 more source

Gastroesophageal reflux disease and tooth erosion [PDF]

open access: yes, 2012
The increasing prevalence of gastroesophageal reflux disease (GERD) in children and adults, and of “silent refluxers” in particular, increases the responsibility of dentists to be alert to this potentially severe condition when observing unexplained ...
Kaidonis, J.   +5 more
core   +1 more source

Comparison of Tooth Size Discrepancy of Three Main Ethnics in Malaysia with Bolton's Ratio [PDF]

open access: yes, 2014
The objective of this study was to investigate the applicability of Bolton's ratios in orthodontic population of Malaysian main ethnics; Malay, Chinese and Indians.
Othman, S. A., Abd Rahman, A. N. A.
core   +1 more source

Design and Mechanical Behavior Analysis of the Locking Mechanism on Jackup Drilling Platform

open access: yesShiyou jixie, 2015
The jackup drilling platform uses widely the worm and worm wheel driven tooth-shape wedge-type locking system.The studies on the drilling platform gear and rack lifting system have been focused on the stability,but seldom on the stress and strain of the ...
Zhou Xin
doaj  

Tooth Surface Contact Analysis of the Face Gear Pair Involving the Worm Wheel Installation Error

open access: yesJixie chuandong, 2016
The actual tooth surface equation is established considering the worm wheel installation errors based on a five- axis linked CNC grinding machine. The tooth contact analysis( TCA analysis) on the actual tooth surface of face gear and pinion tooth surface
Cui Wei, Tang Jinyuan, Zhou Zhenyu
doaj  

齿轮传动中的齿面接触斑点分析与质量控制

open access: yesJixie chuandong, 2009
The evaluation method of the gear tooth sueface contact pattern and the new and old definition of the tooth surface contact pattern are introduced and compared.The evaluation method of the gear tooth surface contact pattern is proposed.Forming reason for
罗太景
doaj  

An international survey of daily disposable contact lens prescribing

open access: yes, 2013
Free to read\ud \ud Purpose\ud \ud The aim was to determine the extent of daily disposable contact lens prescribing worldwide and to characterise the associated demographics and fitting patterns.\ud \ud Methods\ud \ud Up to 1,000 survey forms were sent ...
Morgan, Philip B.   +3 more
core   +1 more source

Load Tooth Contact Analysis for Arc Tooth Face Gear Considering Assembly Misalignment

open access: yesJixie chuandong, 2015
The generating method is adopted for processing arc tooth face gear to ensure the meshing precision of arc tooth face gear pair. The tooth face contact model is established with assembly misalignment.
Cui Yanmei, Fang Zongde, Wang Xing
doaj  

Tooth Contact Analysis of Herringbone Rack Gears of an Impulse Continuously Variable Transmission

open access: yesInternational Journal of Automotive Science and Technology, 2021
Finite element based tooth contact analysis of a rack and pinion system of an impulse continuously variable transmission is performed in this study. The rack and pinion system are designed with involute profile herringbone tooth profiles.
Zhi Geng, Gang Li̇
doaj  

考虑边缘接触直齿面齿轮传动轮齿接触分析

open access: yesJixie chuandong, 2009
The tooth edge contact of face gear drive with spur pinion isunavoidable. The meshing of face gear drive with spur pinion is investigated. A mathematical model and a constraint condition are developed, by which the contact points on tooth edge could be ...
沈云波, 方宗德, 赵宁, 魏冰阳
doaj  

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