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The Challenges of Generic Deburring vs. CAVF Deburring
Relative to gear hobbing, shaving, and/or post heat-treat grinding to generate accurate tooth morphology there may come a time wherein vibratory deburring is a requirement to remove adherent burrs.
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Changes Ahead in the Roughness Standards
I have written numerous articles on tooth flank surface roughness measurement. This is such a page-turner of a subject!
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Materials Matter : Roughness Measurement: Optical vs. Contact Stylus Profilometry
Optical profilometry will become an important tool for predicting gear performance with more research and development of an objective lens to fit into tooth spaces.
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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.
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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.
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Roughness Measurement Tips: The Scratch Pad
From the perspective of the shop floor environment, the previous Materials Matter column “Roughness Measurement Tips: 2 V 5” discussed the contact stylus 2-micron radius tip versus a 5-micron radius tip.
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Vibratory Media Compositions vs. Attrition and Density
The third in our multi-part series on vibratory processing of gears is focused on understanding how media of different compositions have varying attrition rates and densities, and why these are important in vibratory finishing of gears.
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Selecting media for optimum vibe bowl gear finishing
Choosing the best media depends on structure and shape of the tooth flank, and whether media components should be abrasive, non-abrasive, or a blend.
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Materials Matter: How to Set Up a Vibratory Bowl for Gear Finishing
The vibratory bowl is toroidal-shaped, consisting of a center hub surrounded by an OD wall. Direct drive machines have a motor and driveshaft set inside the center hub.
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Physical Characteristics of the Vibratory Bowl and How They Affect Processing Efficiency
Vibratory bowls are outfitted with hot-poured polyurethane liners and their durometer hardness is an oft-cited characteristic. But what is durometer hardness and how is it useful?
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Measuring Tooth Flank Roughness
Gear performance has continuously increased over the past two decades. Improvements in metals, heat treatments, geometry, and lubrication are just a few of the sources of these improvements.
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Materials Matter : Surface Finishing Rotorcraft Gearing
Rotorcraft gearboxes are designed with the utmost precision to withstand the tremendous demand and loads required to convert thousands of horsepower and RPM into hundreds of RPM and lift torque.
