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1. (WO2018201521) LASER SHOCK AND SUPERSONIC VIBRATION EXTRUSION CO-STRENGTHENING DEVICE AND METHOD

Pub. No.:    WO/2018/201521    International Application No.:    PCT/CN2017/084796
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri May 19 01:59:59 CEST 2017
IPC: C21D 1/09
C21D 7/04
B23P 9/02
Applicants: JIANGSU UNIVERSITY
江苏大学
Inventors: JIANG, Yinfang
姜银方
LI, Xin
李鑫
JIANG, Wenfan
姜文帆
HUANG, Jianyun
黄建云
GAN, Xuedong
甘学东
LI, Xu
李旭
QI, Hongfei
戚洪飞
YU, Wenjun
虞文军
Title: LASER SHOCK AND SUPERSONIC VIBRATION EXTRUSION CO-STRENGTHENING DEVICE AND METHOD
Abstract:
A laser shock and supersonic vibration extrusion co-strengthening device and method. The device comprises a laser assembly, a vibration assembly, a hydraulic assembly and a connecting assembly. The method strengthens a hole (7) formed in a metal sheet (5) simultaneously by laser shock strengthening and supersonic vibration extrusion strengthening; a mandrel (1) is in clearance fit with the hole to constrain the hole, so as to avoid distortion of the hole and a hole angle when the laser shock is performed on an outer surface of a workpiece and to improve the strengthening effect of a hole wall; when the laser shock is performed on the outer surface of the metal sheet, supersonic vibration is applied by the mandrel in the hole; and a three-dimensional pressure stress distribution nearby the hole wall at a certain depth is formed under an interaction produced by power ultrasound and laser shock waves having a certain frequency, amplitude and modality, so that an inner surface having higher anti-fatigue performance and being smoother is provided to the hole. Defects of a traditional strengthening process are overcome, and the problem in strengthening the hole separately through the laser shock or supersonic vibration extrusion is solved.