United Technologies Corporation

Pratt & Whitney Services Pte Ltd.

Kim Wei Cheah

Wai Tuck Chow

Thomas Tan

Ting Cher Ng

Chua Boon Beng

An exemplary shroud milling method includes milling a convex side of a shroud, milling a concave side of the shroud, and holding a shroud within a common fixture when milling the convex side and when milling the concave side.

Turbine shroud milling

A method of injecting laser-blocking material into a workpiece includes communicating molten laser-blocking material through the workpiece as the workpiece is subjected to at least a partial vacuum within an enclosed environment such that the partial vacuum expands any air bubbles in the laser-blocking material and transports the air bubbles out of the workpiece.

Vacuum degassing laser-blocking material system and process

A method comprises identifying an engine-run tip position for an airfoil having a tip section and a root section. The engine-run tip position is displaced and rotated with respect to a nominal position, as defined with respect to the root section before engine running. A airfoil tip is formed on the airfoil, and a machining datum is defined adjacent the airfoil tip. The tip section is translated and rotated to locate the airfoil tip in the nominal position, without respect to a location of the root section. The tip section is restored to a nominal profile by machining the airfoil tip along a machining path defined with respect to the machining datum, wherein the machining path is independent of the displacement and rotation of the engine-run tip position and independent of the position of the root section.

Tip fabrication for rotor blade or stator vane airfoil

An example component polishing method includes polishing a component protecting portions of the component during the polishing using a barrier spaced from the component. The barrier is configured to move together with the component during the polishing.

Polishing assembly and method for polishing using a platform and barrier in a tumbling process

An example component polishing method includes polishing a component, and protecting at least a portion of a component during the polishing using a sacrificial mask. Some of the sacrificial mask is removed during the polishing.

Growing community of inventors

Singapore, Singapore

Kim Wei Cheah