Micro-hole strengthening method combining cone pressure and laser impact

A laser shock strengthening and laser shock technology, used in the field of surface strengthening of parts, can solve the problems of uneven stress distribution in the thickness direction, difficult to remove the mandrel, unable to guarantee the hole wall, etc., to improve the fatigue life and stress corrosion resistance performance, use Increases life and strength, reduces thermal damage
CN103014276AActive Publication Date: 2013-04-03JIANGSU UNIV
5 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2013-04-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a micro-hole strengthening method combining cone pressure and laser impact, and belongs to the technical field of surface strengthening of parts, wherein the strengthening method comprises the following steps of: implementing laser impact strengthening on a position to be processed with holes of a plate material / workpiece, pressing the position to be processed with the holes into the plate material / workpiece by a conical pressure head with comparatively high hardness, and processing micro-holes on the plate material / workpiece; or pressing into the position to be processed with the holes of the plate material / workpiece by the conical pressure head with the comparatively high hardness, drawing out the conical pressure head, implementing laser strengthening treatment on the position to be processed with the holes on the back surface / opposite surface and surrounding parts thereof, and punching the plate material / workpiece. According to the method disclosed by the invention, the problem of poor depth of a pressure stress layer or pulling stress generated after processing the position to be processed with the holes of the plate material by single laser impact strengthening, and the problem on micro-hole strengthening of some plate material-type parts which just permit the laser plate material strengthening on single surface are solved at the same time, so that the processed micro-holes have the pressure stresses in a thickness direction.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of surface strengthening of parts, relates to laser shot peening strengthening and pressing treatment on the surface of parts, and provides a small hole strengthening method combining cone pressure and laser shock. Background technique

[0002] In mechanical structures in aerospace and other fields, holes play an important role in mechanical connection mechanisms. Generally speaking, holes are often the stress concentration parts of the whole part. Components often start to fail at the hole position, resulting in the scrapping of the entire part. In other words, the lifetime of the entire component is reduced due to the lifetime of the hole itself. Therefore, there is an urgent need for an effective small hole strengthening process, the purpose of which is to improve the mechanical properties of parts with holes, so that they can be safer, more reliable and have a longer fatigue life during use.

[0003] ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More