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Advancing rocket propulsion through Additive Manufacturing, novel surface finishing technologies and public-private partnerships
“Traditionally, it takes many months to manufacture, test and deliver a conventional combustion chamber. We can reduce that time considerably,” […]
Technical Papers
Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing
Abral = a proprietary, abrasive vibratory finishing process AEO = all engines operative OEI = one engine inoperative CAVF = […]
Technical Papers
Report of the Condition of a General Electric Transportation Systems Gearbox
Wind power plant operation and maintenance (O&M) costs remain an appreciable contributor to the overall cost of wind energy, with a capacity-weighted average of $11/megawatt-hour (MWh) for projects installed since 2000 and $9/MWh for projects installed since 2010 [1].
White Papers
Rotorcraft Gearbox Regulations: LOL (not what you think)
The European Union’s CS-29 Amendment 7 places more stringent and rigorous testing requirements for certification of Category A type pressurized gearboxes under loss of lubrication conditions compared to the previous regulation.
White Papers
Materials Matter : Roughness Measurement Tips: Calibration, the Razor Blade Test
If a problem is found with a contact stylus profilometer during routine check with a Rubert-Song specimen, do a little troubleshooting before sending it off for calibration and recertification.
White Papers
Roughness Measurement Tips: The Scratch Pad
The scratch pad Due to the increasing quality of engineered surfaces, roughness measurement capability developed greatly during the second half […]
Technical Papers
A Comparison of Surface Roughness Measurement Methods for Gear Tooth Working Surfaces
1 Introduction Surface roughness is a critical parameter for gears operating under a variety of conditions. It directly influencesfrictionandcontacttemperature,andthereforehasanimpactonvariousfailuremodessuchas macropitting, micropitting, […]
White Papers
Vibratory Media Compositions vs. Attrition and Density
WHAT IS ATTRITION RATE? Attrition rate is the rate at which media decomposes during the vibratory run. More abrasive media […]
White Papers
Selecting media for optimum vibe bowl gear finishing
Aluminum oxide grit used in abrasive ceramic media. Finally, spherical media offers the least efficient contact pattern possible, contacting a […]
White Papers
Materials Matter: How to Set Up a Vibratory Bowl for Gear Finishing
SETTING UP THE VIBE BOWL FOR OPTIMUM GEAR-FINISHING PERFORMANCE Amplitude is a commonly cited tool for gauging the correct machine […]
White Papers
Physical Characteristics of the Vibratory Bowl and How They Affect Processing Efficiency
Durometer hardness is measured using durometer tester. Activating a durometer tester depresses a spring loaded indenter pin which deflects the […]
White Papers
Measuring Tooth Flank Roughness
The wide capability range of available roughness measurement equipment. Poor roughness measurement equipment maintenance. Ambiguous roughness specification. Imprecise roughness measurement […]
Technical Papers
Surface Treatment of Powder-Bed Fusion Additive Manufactured Metals for Improved Fatigue Life
Introduction The high-cycle fatigue (HCF) properties of metallic materials made by additive manufacturing (AM) have received considerable recent interest (Ref […]
White Papers
Materials Matter : Surface Finishing Rotorcraft Gearing
Great strides have been made in transmission designs recently, which incorporate many advanced technologies such as ISF. This has been […]
