A micro-nano targeted repair device and method for electromagnetic composite field of the inner ring of aeronautical bearings

Abstract

The invention relates to a micro-nano targeted repair device for the inner ring of an aircraft bearing with an electromagnetic composite field, which includes a driving device, an ultrasonic shot peening device, a pulse current generator and a yoke coil device; the driving device includes a motor and a rotating shaft, and the motor drives the rotation The shaft drives the inner ring of the bearing to rotate synchronously; the ultrasonic shot peening device includes an ultrasonic shot peening chamber, an ultrasonic probe and a steel ball. The upper opening is placed at the lower end of the inner ring of the bearing to be processed; the pulse current generator generates pulse current on the inner ring of the bearing; the yoke coil device is used to excite a magnetic field around the inner ring of the bearing. The invention repairs the in-situ surface micro-nano damages formed during or after the ultrasonic impact surface nanometerization process, thereby homogenizing the deformation, phase transition and internal energy distribution of the nano-layer, and solving the micro-nano scale damage defect of the matrix in the macro-scale manufacturing The control problem breaks through the service performance and life limit of existing aviation bearings.

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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