A Composite Strengthening Method for Thin-Walled Wheels

Abstract

The invention belongs to the technical field of part surface treatment, and relates to a thin-wall wheel disc shot blasting device and a compound reinforcement method which are suitable for aero-engines. The thin-wall wheel disc shot blasting device comprises a pedestal, a right support, a left support, a main shaft, a transmission system, a driving motor, and a wedge peg; the lower end of the right support and the lower end of the left support are arranged on the pedestal through welding; the upper end of the right support and the right end of the main shaft are connected using a bearing; theupper end of the left support and the left end of the main shaft are connected suing a bearing; the main shaft and the inner rings of the bearings are connected through interference fit in a detachable manner; the upper end of the transmission system is connected with the main shaft; the lower end of the transmission system is connected with the driving motor; the driving motor is used for driving the main shaft to rotate around a main shaft axis through the transmission system. According to the thin-wall wheel disc shot blasting device, a wheel disc is suspended in the air using the supports, and is driven to rotate with the main shaft, so that it is beneficial for enlarging of spray gun posture adjustment range, enlarging of spray angle selection range, increasing of shot blasting reachability of interference parts such as tenon teeth, and is especially beneficial for reducing of disc member deformation.

Description

technical field [0001] The invention belongs to the part surface treatment technology, and relates to a compound strengthening method suitable for a thin-walled wheel disk of an aero-engine. Background technique [0002] The service environment of thin-walled discs of aero-engines is very harsh, and is subject to multiple factors such as high stress, high speed, and high temperature. The risk of fatigue failure due to structural and surface stress concentration effects is high. Shot peening is an effective method to improve the fatigue performance of thin-walled roulette. A large number of high-speed projectiles are used to hit the surface of the material, causing repeated elastic-plastic deformation on the surface of the material, forming a certain depth of tissue strengthening layer and residual compressive stress layer, thereby improving A processing method for the overall fatigue performance of materials. Due to the remarkable anti-fatigue effect, the shot peening proce...

AI Technical Summary

Problems solved by technology

At present, there are three deficiencies in the traditional shot peening process of thin-walled roulette: 1) The process is single, and different process parameters cannot be adopted according to the structural strength of different parts of the thin-walled roulette, and there is a problem of sacrificing fatigue performance in order to control deformation. As a result, the shot peening effect cannot be fully utilized; 2) The size of the thin-walled roulette is out of tolerance after shot peening, because the traditional method adopts the method of shot peening on both sides of the roulette sequentially, resulting in serious deformation of the roulette; 3) The tenon and groove after shot peening The surface roughness of the disc center is too large, resulting in a significant local surface stress concentration factor, and there is a high risk of high-cycle and low-cycle fatigue failure

Images