Machining method for aero-engine tight-sealing labyrinth disc

Abstract

The invention provides a machining method for an aero-engine tight-sealing labyrinth disc. According to the machining method, the problem that when the labyrinth disc is machined through an existing machining method, deformation of the labyrinth disc is difficult to control, and thus the side of the labyrinth disc cannot be guaranteed can be solved. The machining method comprises the following steps that the positions, corresponding to labyrinth teeth, of a labyrinth disc blank are designed as the first technological edge, and the position, corresponding an upper spoke plate, of the labyrinthdisc blank is designed as the second technological edge; the labyrinth disc blank is clamped and positioned through the first technological edge, and a lower spoke plate and a hub are machined; the labyrinth disc blank is clamped and positioned through the second technological edge, and the labyrinth teeth are machined; and the labyrinth disc blank is clamped and positioned through a main installation datum surface of the lower spoke plate, the upper spoke plate is machined, and the labyrinth disc is processed.

Description

Technical field [0001] The invention relates to the processing field of aero-engine sealing grate discs, in particular to a processing method of aero-engine sealing grate discs. Background technique [0002] figure 1 It is a cross-sectional view of the sealed grate disk of a certain engine in the radial direction, which includes a hub 28, a lower spoke plate 29, an upper spoke plate 30 and a grate tooth 31 arranged from the inside to the outside. The upper part of the lower plate 30 is mainly installed At reference surface 21, the outer diameter of the grate disc is 540mm, and the thinnest part of the web is only 2.7mm. The material of the grate disc is powder high temperature alloy, and the grate disc is deformed very seriously during processing. In order to achieve the purpose of normal processing of the grate disc, it is customary to design the process edges of different structures at the largest outer circle of the grate disc, that is, to construct the boss, and then first ax...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a processing method for sealing the grate toothed disc of an aero-engine, which can solve the problem that it is difficult to control the deformation of the grate toothed disc by using the existing processing method, resulting in the size of the grate toothed disc cannot be guaranteed Problems, so that the processing quality of the grate tooth plate can be guaranteed

Images