Special fixture for welding multi-weld blade ring parts and welding deformation control method

Abstract

The invention discloses a special fixture for welding a multi-weld blade ring part and a welding deformation control method. The fixture ensures that an outer casing, an inner ring and blades meet drawing requirements after being assembled; the height positions of the outer casing and the inner ring are ensured by controlling the distance and tolerance between the bottom surface of a positioning ring and the bottom surface of an inner positioning ring; the axial position and the radial position of the outer casing are controlled through the positioning ring and an upper support ring; the outer casing is attached to the positioning ring through pressing of a movable pressing plate, and the upper support ring is attached to the outer casing through a baffle; the axial position and the radial position of the inner ring are controlled through the inner positioning ring and a compression ring; the inner ring is compressed by the compression ring through a hexagonal head compression screw; the position of an upper positioning ring is limited through the end surface position of a large support column; and through the technological processes of part assembly, argon arc positioned welding, three-coordinate measurement, electron beam welding, nondestructive inspection, vacuum heat treatment, size inspection and the like, welding deformation is effectively reduced, and the dimensional accuracy and the use performance of parts are improved.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a special welding jig and welding deformation control method for leaf ring parts with multiple welds. Background technique [0002] The aero-engine stator assembly belongs to the multi-welded leaf ring parts, and there are five levels in total, namely zero level, one level, two level, three level and four level, among which the zero level structure is as follows figure 1 Shown: It consists of outer case, inner ring and 80 blades. The blade edge plate and the outer ring are connected by electron beam welding. The tip of the blade is inserted into the hole of the inner ring. After welding, the tip of the blade is connected to the inner ring by pouring glue ; In order to ensure the performance of the engine and meet the requirements of the intake air flow, the chord angle dimension of the stator assembly in the blade section ( figure 2 Medium size ①31°40′±30′), blade section ...

AI Technical Summary

Problems solved by technology

In the early stage of production, the normal delivery of the product has been affected due to the serious deformation of the blade and the inner flow channel of the outer ring

Images