Gas circulating device for blade micropore angle measurement

Abstract

A gas circulating device for blade micropore angle measurement comprises a base, a first shaft rotary table used for adjusting the horizontal rotating angle is fixedly installed on the base, and the first shaft rotary table is fixedly connected with a second shaft rotary table used for adjusting the vertical rotating angle through a first connecting arm; the second shaft rotary table is provided with a second connecting arm, the second connecting arm is detachably connected with a blade clamping base, the blade clamping base is detachably connected with an aero-engine blade, the base is connected with a gas recovery device in a lifting mode, and a powder box and a powder recovery box are arranged beside a workbench. According to the gas circulating device for blade micropore angle measurement, the measurement efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a device for measuring the real angle of small microholes on an aeroengine blade by using colored gas. Background technique [0002] For modern aero-engines, with the increasing performance, the working environment of various components, especially the blades, is getting worse and worse. Therefore, various technical means need to be used to deal with it. For example, for turbine blades, in order to ensure their To maintain good mechanical properties under high temperature and high pressure environment, it is necessary to cast the blade into a hollow structure, set the exhaust passage in the inner cavity, and process multiple The air film hole is connected to the inner cavity, so that the cold air entering the inner cavity can be ejected from the air film hole of the blade body, and while taking away a certain amount of heat from the blade body, a layer of cold air protection ...

AI Technical Summary

Problems solved by technology

[0010] 1. It can only judge whether the angle (that is, the processing parameters) adjusted by the fixture and / or machine tool is correct. For example, the angle is measured by processing a large hole of φ1 with a measuring rod. After the angle is qualified, the angle of a small hole with a diameter of φ0.25 is processed by default. Qualified, but the actual large hole of φ1 is not directly related to the diameter of φ0.25 (the parameter settings of the EDM equipment are different), this measurement method has a large error, usually between 1° and 1.5°

[0011] 2. The inner cavity of the aero-engine blade 100 has complex circuits and ribs. After the measuring rod enters the inner cavity, it is easy to interfere, causing the measuring rod to tilt to one side, and the measurement angle is inaccurate

[0012] 3. The aeroengine blades 100 are all made of high-temperature alloy materials, so the processing is difficult and the processing time is long. Usually, it takes about 15 minutes to process a φ1 hole

[0013] 4. The aero-engine blade 100 after processing the φ1 hole can only be scrapped, and 2 to 3 blades need to be scrapped for each batch of blade processing, and the price of each blade is 10,000 to 30,000, which causes great waste

[0015] But in the above-mentioned scheme that utilizes the rigid measuring pin to measure, although the data accuracy is high, on each blade of each batch, at least one of the air film holes in each group of the air film holes 21 21, the measuring needle is assembled, and the assembly of the measuring needle is relatively cumbersome, so the labor intensity of the workers is still relatively high, and because the assembly of the measuring needle takes a long time, the overall measurement efficiency needs to be improved

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