Numerically controlled drilling and milling processing method for runner of blisk of engine

Abstract

The invention provides a numerically controlled drilling and milling processing method for a runner of a blisk of an engine. The main technical flow before drilling and milling the runner comprises the following steps: lathing each surface of a blank, performing nondestructive testing, lathing inner and outer cavities of the blisk, finely milling a needed periphery and an axial benchmark, drilling and boring an angular datum hole, drilling and milling the runner and inspecting. A part and a fixture are in peripheral seam allowance fit to limit a radial degree of freedom of the part; an end face gland and a central pull bar axially limit an axial degree of freedom of the part; and a precise positioning pin angularly limits an angular degree of freedom of the part. The method has the advantages that: by applying the drilling and milling processing method to a part machining process of the blisk of the engine having the material removing rate of over 90 percent, the method improves the processing efficiency, shortens the manufacturing period of the product, and provides a new technical means for removing a large amount of remainder materials of the blisk; and the processing of a high-temperature alloy, a titanium alloy and other difficult-to-process materials shows that the material is more difficult to process, the removing rate is bigger and the effect is more obvious.

Description

Technical field [0001] The present invention relates to the technical field of multi-axis numerical control drilling and milling processing, and in particular provides a numerical control drilling and milling processing method for an engine blisk flow passage. Background technique [0002] Increasing the thrust-to-weight ratio of the engine is of great significance to the flight speed and flexibility of the aircraft, and weight reduction is the most important way to increase the engine thrust-to-weight ratio. The integral blisk, one of the key parts of the latest structural parts for weight reduction, is mostly made of typical difficult-to-machine materials such as high-temperature alloys and titanium alloys. The parts are characterized by thin webs, large-size wide-chord blades, large torsion angles, and complex and weakly rigid structural parts with long cantilevers, which bring greater difficulty to process manufacturing. [0003] As the performance requirements of advanced eng...

AI Technical Summary

Problems solved by technology

In addition, the material removal rate of the blisk is as high as 90%, so advanced manufacturing technology and new manufacturing technology support must be given to such high-precision and complex structural parts, otherwise it will be difficult to meet product requirements

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