Three-coordinate curved surface compensation detection method for integral blade ring

Abstract

The invention discloses a three-coordinate curved surface compensation detection method for an integral blade ring. The method comprises the following steps: step 1, clamping and aligning, and establishing a probe; 2, performing digital-analog processing, and segmenting theoretical position data points ; 3, establishing a coordinate system and adjusting the coordinate system; 4, allowing the blade profile to be subjected to surface sweeping; 5, compensating and correcting the blade profile scanning points; 6, evaluating the blade profile parameters by adopting blade profile analysis software; and 7, evaluating and analyzing the profile tolerance of a runner by adopting a conversion evaluation mode. According to the method, the problem of poor detection precision of complex parameters of blisk parts such as integral blade rings is solved, cosine errors caused by two-dimensional section scanning are eliminated, the integrity of measured data is ensured, the detection efficiency and accuracy are effectively improved, and the application of a three-dimensional compensation technology on a coordinate measuring machine is realized.

Description

technical field [0001] The invention relates to the technical field of airfoil parameter detection, in particular to a three-coordinate curved surface compensation detection method for an integral leaf ring. Background technique [0002] Most of the blades are strongly twisted, thin-walled, and free and complex curved surfaces, which require high detection accuracy. Airfoil parameters mainly refer to the profile and geometric dimensions of the profile, usually including: profile of the basin, profile of the back, profile of the leading edge, profile of the trailing edge, chord length, maximum thickness, thickness of the leading edge, thickness of the trailing edge, Torsion angle, conversion torsion angle, etc. The three-dimensional two-dimensional cross-sectional scanning of the blade surface has a certain cosine error, that is, the Z value of the center of the sphere is kept unchanged at the position of the theoretically required section height value to scan the blade body...

AI Technical Summary

Problems solved by technology

[0004] The three-dimensional scanning of the flow channel on the axis of the engine or along the direction of the flow channel is prone to the phenomenon of "offset" theoretical position of the actual measurement point during general evaluation, the efficiency of subsequent data and result evaluation is low, and the oblique compensation will have deviations, such as image 3 shown

[0005] Due to the measurement error of the three-dimensional two-dimensional cross-sectional scanning of the overall leaf ring, the deviation of the flow channel scanning, etc., the data deviation of the leaf shape detection of the part is caused and the detection efficiency is low.

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