A method for machining the profile surface of an aviation compressor cover

Abstract

The invention discloses an aero-compressor cover contour surface machining method. According to the situation that a part contour surface is provided with interrupted holes and a hard coating layer, the contour surface machining method furthest decreases cutting force applied to a part by a cutter, the contour surface is prevented from deformation due to the action of external force, and the qualified size of the contour surface is ensured. Therefore, cutter vibration and cutter relieving in machining of the interrupted holes by the cutter are avoided, excessive cutting force generated in machining of the hard coating layer by the cutter is eliminated, and cutting deformation and stress release deformation of the part are effectively controlled or reduced.

Description

technical field [0001] The invention relates to the technical field of contour surface processing, in particular to a method for processing the contour surface of an aviation compressor cover. Background technique [0002] The material of the existing compressor cover is a deformed superalloy, a large diameter, an ultra-thin wall thickness (0.5-2mm), and an annular part with high contour surface accuracy. Such parts have irregular shapes, uneven wall thickness and surface Hard coating, insufficient structural rigidity, poor machinability, and the contour surface is easily deformed by external force. Such parts are mainly used in the field of aero-engine manufacturing. [0003] A certain type of compressor cover in a certain company, size: φ450mm×φ230mm×100mm, minimum wall thickness: 0.5mm, is an ultra-thin-walled annular part, with irregular shape and poor structural rigidity; the material is nickel-based superalloy, and the tool machinability is poor, easy to Deformed by ...

AI Technical Summary

Problems solved by technology

[0005] The problems caused by processing are as follows: ①Due to the existence of intermittent holes, the tool constitutes intermittent cutting, and there are phenomena of tool vibration and tool yielding. At the same time, the cutting force applied to the part is uneven; the tool is easy to wear, which increases the cutting force, and the inner contour of the part Surface, contour reference end face A, and end face at the first discontinuous hole are deformed by cutting force;

[0006] ②Due to the large diameter and thin wall of the part, there are tool vibration and tool clearance phenomena on the contour surface of the part, and the flatness, parallelism and surface contour degree relative to the reference cannot be guaranteed;

[0007] ③ After the part is removed, the part is in a free state, due to the release of cutting stress, the size of the part contour surface is inconsistent with the size measurement result under the clamp restraint state, and the size is seriously out of tolerance, which cannot be guaranteed to be qualified;

[0008] ④Due to the high hardness of the sprayed coating, uneven surface and uneven coating thickness, the cutting force of the tool is uneven, and the parts are irregularly deformed by the cutting force

[0010] ① It is impossible to avoid the phenomenon of tool vibration and tool letting when the tool is machining intermittent holes;

[0011] ② It is impossible to eliminate the excessive cutting force generated when the tool is processing the hard coating;

[0012] ③Unable to effectively control or reduce the cutting deformation and stress release deformation of parts

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