Device and method for measuring angle of tenon pressure surface of dovetail blade

Abstract

The invention relates to a device and method for measuring the angle of the tenon pressure surface of a dovetail blade. It includes a base, on which a positioning block is installed, and an inclined plane is arranged on the base. The inclined plane connects with the left end face of the positioning block to form an acute angle area. The positioning block is equipped with a horizontal dial indicator and a movable measuring pin that can slide. The movable measuring pin is perpendicular to the left end face of the positioning block, and the left end of the movable measuring pin extends to the acute angle area, and the right end is connected to the fixed axis to rotate The displacement of the movable measuring pin is transmitted to the lever of the dial indicator head; below the movable measuring pin, two positioning pins are fixedly installed at the left end of the positioning block, and the ends of the positioning pins are flush with the ends of the movable measuring pin. In the present invention, the standard part or the tenon pressure surface to be measured will push the movable measuring pin to slide, and the displacement will be transmitted to the dial gauge through the lever, and the angle difference between the tenon pressure surface angle and the standard part can be obtained by direct measurement, and the pressure surface can be obtained through calculation Angle actual value, convenient and accurate measurement.

Description

【Technical field】 [0001] The invention belongs to the measurement technology of aero-engines, and in particular relates to a device and method for measuring the pressure surface angle of a tenon of a dovetail blade. 【Background technique】 [0002] Blades are a very important type of aero-engine parts and play a key role in the performance of the engine. The angle of the pressure surface is required to be 60°±4’, and its actual value needs to be tested. When testing the tenon of dovetail blades, there are generally two measurement methods. The first one is to detect a single element of the tenon, which includes the width of the dovetail node, the angle of the dovetail, and the straightness of the dovetail. This detection method directly measures the measured The actual value of the size; the second is to check the tenon comprehensive elements, which includes projection inspection, tenon comprehensive gauge inspection, etc., among which the projection inspection is to project...

AI Technical Summary

Problems solved by technology

When testing the tenon of dovetail blades, there are generally two measurement methods. The first one is to detect a single element of the tenon, which includes the width of the dovetail node, the angle of the dovetail, and the straightness of the dovetail. This detection method directly measures the measured The actual value of the size; the second is to check the tenon comprehensive elements, which includes projection inspection, tenon comprehensive gauge inspection, etc., among which the projection inspection is to project the two pressure surfaces, and the tenon comprehensive gauge is measured by two measures, one large and one small. The qualified tenon can be snapped in, so these testing methods can only judge whether the comprehensive size of the tenon is qualified, and cannot get the actual value

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