Documenti tecnici
Documenti tecnici
A Novel Approach to the Refurbishment of Wind Turbine Gears
Multi-megawatt wind turbine gearboxes operate under demanding environmental conditions including considerable variation in temperature, wind speed, and air quality.
Documenti tecnici
Superfinishing and its Effect on Micropitting
Micropitting is a prominent failure mechanism for both highly stressed case carburized gears and bearings that operate consistently in low speed, low load environments where boundary conditions predominate.
Documenti tecnici
The Impact of Surface Condition and Lubricant on Gear Tooth Friction
Frictional losses in gear boxes are of significant interest to gear box designers as these losses transform into heat. The direct result is a reduction in the fuel efficiency of the vehicle involved.
Documenti tecnici
An Evaluation of the New Rapid ISF® Process for Rear-Axle Gears
The benefits gained by Superfinishing rear-axle gearsets using traditional chemically accelerated vibratory finishing is well documented.
Documenti tecnici
Superfinishing Rear Axle Gears – A Significant Step Toward Reducing Automotive Greenhouse Gas Emissions
New regulations make it imperative that the European and US automotive industries meet strict, lower greenhouse gas emission standards.
Documenti tecnici
Comparative Corrosion Characteristics of Ground and Superfinished Gear Steels
The described effort was undertaken to assess the impact of the isotropic superfinishing (ISF®) process on the corrosion resistance of a variety of gear steels.
Documenti tecnici
The Effect of the Surface Roughness Profile on Micropitting
A wide choice of surface roughness parameters is available to characterize components, such as gears or bearings, with the goal of predicting the performance of such metal–to–metal contacting parts.
Documenti tecnici
High Speed, Automatable Superfinishing of Rear-Axle Hypoid Gears
By: Michael Frechette, Gary Sroka, Matt Bell-REM Surface Engineering and REM Research Group Technical Papers and White Papers The benefits […]
Documenti tecnici
A Novel Approach to the Refurbishment of Wind Turbine Gears
By: M. Michaud, REM Surface Engineering, G. J. Sroka and R. E. Benson, REM Research Group Technical Papers and White […]
Documenti tecnici
Gear Corrosion During the Manufacturing Process
By: O. El-Saeed and G. Sroka, REM Chemicals Inc. and G. Blake Rolls-Royce Corporation
Abstract
No matter how well gears are designed and manufactured, gear corrosion can occur that may easily result in catastrophic failure. Since corrosion is sporadic and a rare event and often difficult to observe in the root fillet region or in finely pitched gears with normal visual inspection, it may easily go undetected. This paper presents the results of an incident that occurred in a gear manufacturing facility several years ago that resulted in pitting corrosion and intergranular attack (IGA). It showed that superfinishing can mitigate the damaging effects of IGA and pitting corrosion, and suggests that the superfinishing process is a superior repair method for corrosion pitting versus the current practice of glass beading.
Documenti tecnici
The Effect of Superfinishing on Gear Micropitting, Part I
The most common failure mechanism of highly stressed case carburized gears is micropitting (gray staining). The standard FZG gear test (FVA Work Sheet 54) is generally used to determine the micropitting load capacity of gear lubricants.
Documenti tecnici
Superfinishing Motor Vehicle Ring and Pinion Gears
Today, the motor vehicle market is focusing on “lubed for life” differentials requiring no service for the life of the vehicle. Still, differentials are prone to develop problems of one sort or another since they are used to transmit a heavy torque through a right angle.
