Measuring method and fixture used for measuring blade internal structure

Abstract

The invention provides a measuring method used for measuring the internal structure of a blade and a used jig. Internal parts of a turbine blade comprise a turbulence column and a rib type structure. The measuring method comprises the steps that a gas turbine first-level guide blade is clamped on an auxiliary jig; the jig is clamped on a B turret of a composite optical coordinate machine; a TP200 touch probe measuring jig is called to establish an initial coordinate system; when measuring is carried out, a corresponding button of a control box is pressed to reduce measurement force; according to the design drawing of the auxiliary jig, the initial coordinate system is translated and rotated, so that a measurement coordinate system is consistent with a blade detection coordinate system; B and C turrets are adjusted, so that angles among the turbulence column to be measured, a rib and the Z axis of an instrument machine coordinate system are minimum and projection errors are reduced; an optical lens of the composite optical coordinate machine is used to measure structure parameters of the turbulence column, the rib type structure and the like in a cavity of the gas turbine first-level guide blade.

Description

technical field [0001] The invention relates to the field of compound optical coordinate machine measurement, in particular to a machine measurement method for measuring the internal structure of a blade and a used fixture. Background technique [0002] The performance of an aero-engine largely depends on the quality of the blades. Gas turbine guide blades have a large number, complex shapes, high requirements, difficult processing, and are prone to failures. They have always been the key to the production of engine factories. The gas produced in the combustion chamber first passes through the guide blades of the gas turbine, and the temperature of the gas increases, which can increase the output power per unit volume of the engine. However, the increase of gas temperature will bring a series of serious problems to the operation of the engine. Therefore, it is necessary to improve the cooling effect of the turbine blades during operation. Only by improving the performance of...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a mechanical measurement method for measuring the internal structure of the blade and the used fixture to solve the technical problem in the prior art that it is impossible to accurately measure the outline and size of spoiler posts and ribs on the inner wall of the turbine blade

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