Title:
ULTRASONIC IMPACT SURFACE NANO-STRENGTHENING DEVICE AND METHOD FOR AERO-ENGINE BEARING INNER RING
Document Type and Number:
WIPO Patent Application WO/2022/233085
Kind Code:
A1
Abstract:
The present invention relates to an ultrasonic impact surface nano-strengthening device for an aero-engine bearing inner ring. The ultrasonic impact surface nano-strengthening device comprises: a driving device comprising an electric motor and a rotary shaft, with a bearing inner ring to be machined being mounted on the rotary shaft, and the electric motor driving the rotary shaft to drive the bearing inner ring to rotate synchronously; and an ultrasonic shot peening device comprising an ultrasonic shot peening cavity, an ultrasonic probe and a steel ball, the ultrasonic probe extending into the ultrasonic shot peening cavity from a lower end opening, the steel ball covering an upper surface of the ultrasonic probe, and an upper end opening of the ultrasonic shot peening cavity being arranged at a lower end of the bearing inner ring to be machined to achieve clearance-fit. In the present invention, a fixture that is vertically adjustable and is mounted in a split manner is used to solve the problem of ultrasonic shot peening being unsuitable for the manufacturing of bearings due to the limitations of generation and vibration devices and the shot peening direction thereof; and a cambered cavity is used to achieve precise clearance-fit with a raceway of the bearing inner ring, a speed-adjustable electric motor is used to achieve variable-speed rotation, the shot peening distance is vertically adjustable to achieve an adjustable process parameter, and ultrasonic impact is successfully applied to the the aero-engine bearing inner ring so as to generate a surface nano-layer of a certain thickness on a surface of the raceway.
Inventors:
YIN FEI (CN)
HUA LIN (CN)
YANG CHANG (CN)
HUA LIN (CN)
YANG CHANG (CN)
Application Number:
PCT/CN2021/105626
Publication Date:
November 10, 2022
Filing Date:
July 10, 2021
Export Citation:
Assignee:
UNIV WUHAN TECH (CN)
International Classes:
C21D7/06
Foreign References:
| CN109097544A | 2018-12-28 | |||
| CN107739798A | 2018-02-27 | |||
| CN107488778A | 2017-12-19 | |||
| CN107630128A | 2018-01-26 | |||
| CN107574293A | 2018-01-12 | |||
| CN112662966A | 2021-04-16 | |||
| CN112680579A | 2021-04-20 | |||
| CN103231202A | 2013-08-07 | |||
| US20090301152A1 | 2009-12-10 | |||
| JP2006346775A | 2006-12-28 |
Attorney, Agent or Firm:
HUBEI WUHAN YONGJIA PATENT AGENCY CO., LTD. (CN)
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