Aero-engine bearing inner ring electromagnetic composite field micro-nano targeted repairing device and device

Abstract

The invention relates to an aero-engine bearing inner ring electromagnetic composite field micro-nano targeted repairing device. The device comprises a driving device, an ultrasonic shot blasting device, a pulse current generator and a magnet yoke coil device. The driving device comprises a motor and a rotating shaft, and the motor drives the rotating shaft to drive a bearing inner ring to synchronously rotate. The ultrasonic shot blasting device comprises an ultrasonic shot blasting cavity, an ultrasonic probe and a steel ball, the ultrasonic probe extends into the ultrasonic shot blasting cavity from a lower end opening, and the steel ball is arranged on the ultrasonic probe. An upper end opening of the ultrasonic shot blasting cavity is formed in the lower end of the to-be-machined bearing inner ring. The pulse current generator generates pulse currents on the bearing inner ring. The magnet yoke coil device is used for exciting a magnetic field around the bearing inner ring. According to the device, in-situ surface micro-nano damage formed in the ultrasonic peening surface nanocrystallization process or after the ultrasonic peening surface nanocrystallization process is repaired, and therefore homogenization of deformation phase change and internal energy distribution of a nanolayer is achieved, the problem of matrix micro-nano scale damage defect control in macroscale manufacturing is solved, and the existing aero-engine bearing service performance and service life limits are broken through.

Description

technical field [0001] The invention relates to the technical field of nano-strengthening tooling on the surface of workpieces, in particular to a micro-nano targeted repair device and method for the inner ring of an aircraft bearing with an electromagnetic composite field. Background technique [0002] Hangfa bearings are the core components of aero-engines. Due to their extreme working conditions and complex manufacturing processes, their extremely high service performance and life guarantee are frontier challenges in the manufacturing field. Studies have shown that the main failure modes of aero-engine bearings are surface damage and fracture, and the existing forming and heat treatment processes are difficult to achieve revolutionary improvements in the performance of the raceway surface and substrate of aero-engine bearings. The performance and life of Hangfa bearings have reached the limit and it is difficult to break through, which has become an international problem ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an electromagnetic composite field micro-nano-targeting method for the inner ring of the aircraft bearing ring in view of the difficulty in controlling the micro-nano-scale damage defects of the matrix in the macro-scale manufacturing (such as shot peening) of the currently processed bearing rings. The repair device and method repair the in-situ surface micro-nano damage formed during or after the ultrasonic impact surface nano-scale, so as to homogenize the deformation, phase transition and internal energy distribution of the nano-layer, and solve the problem of matrix micro-nano damage in macro-scale manufacturing. Scale damage defect control problem, breaking through the service performance and life limit of existing aviation bearings

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