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Advancing rocket propulsion through Additive Manufacturing, novel surface finishing technologies and public-private partnerships

Whilst Additive Manufacturing is undoubtedly having a huge impact on the design and manufacture of rocket propulsion systems, most notably combustion chambers and nozzles, the Achilles’ heel of all AM process is currently as-built surface finish.

Advancing-rocket-propulsion-through-Additive-Manufacturing

Technical Papers

Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing

The wind turbine, aerospace, and helicopter gear industries recognize the importance of surface finish and surface texture for maximizing component and system performance.

Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing

Technical Papers

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.

Technical Papers

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.

Technical Papers

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.

Technical Papers

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.

Technical Papers

The Capacity of Superfinished Vehicle Components to Increase Fuel Economy

The lubricant industry is emphasizing the use of low-viscosity lubricants to increase fuel economy. Fuel mileage increases as high as 8% are claimed when conventional engine and driveline lubricants are replaced with new generation products.

Technical Papers

Evaluation of Isotropic Superfinishing on a Bell Helicopter Model 427 Main Rotor Gearbox

The surface finish of a gear tooth is a critical factor in the wear, durability, noise generation, and efficiency of modern helicopter transmissions.

Technical Papers

Isotropic Superfinishing of S-76C+ Main Transmission Gears

Isotropic Superfinishing is a chemically accelerated vibratory finishing process that is capable of generating surface finishes with an Arithmetic Mean Roughness (Ra)< 3 min.

Technical Papers

Repair of Helicopter Gears

In order to reduce costs by extending the operational life of the sun and input pinion gears of a helicopter transmission, scraped gears were subject to a superfinishing process.

Technical Papers

Evaluation of the Scuffing Resistance of Isotropic Superfinished Precision Gears

The high performance required from aerospace gears places stringent requirements upon the metallurgical quality, geometry, and surface finish of mating parts.

Technical Papers

Horsepower Retention by ISF (Isotropic Superfinishing) of Automotive Racing Components

Automotive power and drivetrain components typically transfer the energy from fuel combustions through a series of metal-to-metal mechanical components.

Technical Papers

Effect of Superfinishing on Scuffing Resistance

A fundamental understanding of gear scuffing has been promoted for a number of years by the use of twin disc scuffing rigs.

Technical Papers

The Reduction of Parasitic Friction in Automotive Gearbox and Drive Train Components by the Isotropic Superfinish

Microscopic examination of the traditionally ground tooth surfaces of automotive transmission gears reveals a micro-roughness, and unidirectional pattern corresponding to the direction of the gear tooth grinding operation.

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