A gas device for measuring the angle of small microholes in blades

Abstract

A gas device for measuring the angle of small microholes in blades, which includes a base for installation on the workbench of a digital horizontal projector, and a first shaft for adjusting the horizontal rotation angle is fixedly installed on the base The turntable, the first axis turntable is fixedly connected with the second axis turntable for adjusting the vertical rotation angle through the first connecting arm, the second axis turntable is equipped with a second connecting arm, and the second connecting arm is detachably connected with The blade holder is detachably connected to the blades of the aeroengine, the blade holder can be connected to an aerosol storage tank through a pipeline provided with a pressure valve, and the base can be lifted and connected with a gas converging device. The gas device for measuring the angle of small micro-holes of blades provided by the invention can directly measure the angle of the air film holes of the blades quickly and intuitively on a digital horizontal projector, and obtain the real angle data of the air film holes, The measurement efficiency is greatly improved.

Description

Technical field [0001] The present invention relates to the field of measurement technology, particularly to a device that measures the true angle of small micropores on the blades of an aero engine. Background [0002] For modern aero engines, with the increasing performance of the performance, the working environment of various components, especially the blades, is becoming more and more harsh, so it is necessary to use various technical means to cope, for example, for turbine blades, in order to ensure that they still maintain good mechanical properties in a high-temperature and high-pressure environment, it is necessary to cast the blades into a hollow structure, by setting up exhaust channels in the inner cavity, and processing multiple air film pores on the leaf body of the blade, especially on the exhaust side of the leaf body, to connect the inner cavity. So that the cold air entering the inner cavity can be sprayed out from the pores of the leaf body, while taking away ...

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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