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APPARATUS FOR DETERMINING THICKNESS AT DISCRETE POINTS ON A TURBINE BLADE

IP.com Disclosure Number: IPCOM000252453D
Publication Date: 2018-Jan-12
Document File: 3 page(s) / 543K

Publishing Venue

The IP.com Prior Art Database

Abstract

The apparatus allows for measuring thickness at discrete points on an airfoil without requiring Coordinate-Measuring Machine (CMM) or other complex or expensive methods. The apparatus fixtures against the blade dovetail or other datum features and contains holes positioned to measure blade thickness in the appropriate direction and at multiple locations. A micrometer or other similar tool can then be inserted in the inspection holes to determine the blade thickness at all locations of interest. The apparatus can be configured to work with shrouded or unshrouded blades.

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APPARATUS FOR DETERMINING THICKNESS AT DISCRETE POINTS ON A TURBINE BLADE

ABSTRACT

The apparatus allows for measuring thickness at discrete points on an airfoil without requiring

Coordinate-Measuring Machine (CMM) or other complex or expensive methods. The apparatus

fixtures against the blade dovetail or other datum features and contains holes positioned to

measure blade thickness in the appropriate direction and at multiple locations. A micrometer or

other similar tool can then be inserted in the inspection holes to determine the blade thickness at

all locations of interest. The apparatus can be configured to work with shrouded or unshrouded

blades.

BACKGROUND

The thickness of gas turbine blades plays a key role in determining the part’s performance and

mechanical capability. These dimensions are captured during production via methods such as

CMM which characterize the entire airfoil, but it can sometimes be necessary or desired to check

a subset of dimensions once a part has been fielded. This can be a costly and time-consuming

effort if the blades must be disassembled from the rotor and/or shipped to a separate facility

which has the capability to perform such measurements. This invention allows for airfoil

thickness to be measured quickly, easily and accurately at the points of interest. The tool can be

manufactured by conventional means or additively, allowing for easy customization so it can be

used with different components or if the points of interest change over tim...