Water jet peening method

Patent metadata

Field	Value
Publication number	US-10549323-B2
Application number	US-201715822976-A
Country	US
Kind code	B2
Filing date	Nov 27, 2017
Priority date	Feb 23, 2017
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A simple water jet peening method is usable for a smaller device, and allows use of an existing underwater washing machine. The method includes immersing an object in a water based washing liquid in a washing bath to have a processing surface at a distance of at least 100 mm and less than 300 mm from a liquid surface of the water based washing liquid, and jetting the water based washing liquid from a nozzle downward toward the object in the water based washing liquid contained in the washing bath.

First claim

What is claimed is:

1. A water jet peening method, comprising:
immersing an object in a water based washing liquid in a washing bath to have a processing surface at a distance of at least 100 mm and less than 300 mm from a liquid surface of the water based washing liquid; and
jetting the water based washing liquid from a nozzle downward toward the object in the water based washing liquid contained in the washing bath,
wherein the water based washing liquid is free of surfactant and contains an amine compound,
jetting the water based washing liquid from the nozzle includes jetting the washing liquid at a jet pressure of at least 15 MPa and not more than 35 MPa, and
jetting the water based washing liquid from the nozzle includes jetting the washing liquid while the nozzle has an end at a distance of at least 50 mm and not more than 250 mm from the liquid surface in the washing bath.

2. The water jet peening method according to claim 1 , wherein
jetting the water based washing liquid includes imparting compressive residual stress in the processing surface.

3. The water jet peening method according to claim 1 , wherein
the object comprises an aluminum alloy.

4. The water jet peening method according to claim 1 , wherein
jetting the water based washing liquid from the nozzle includes jetting the washing liquid while allowing a circulation obstruction to obstruct circulation of the washing liquid in the washing bath to reduce liquid surface waves.

5. The water jet peening method according to claim 2 , wherein
the object comprises an aluminum alloy.

6. The water jet peening method according to claim 1 , wherein
the water based washing liquid further contains an anticorrosive.

Assignees

• Sugino Mach

Inventors

• Sugita Koji
• Otani Shunji

Classifications

• B05B1/34

  designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl (designed to control volume of flow B05B1/30) · CPC title

• B05B1/02

  designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) · CPC title

• C21D7/06 Primary

  by shot-peening or the like · CPC title

• B24C1/10 Primary

  for compacting surfaces, e.g. shot-peening (for deforming sheet metal, tubes or profiles B21D31/06; as a metallurgical treatment C21D7/00, C22F1/00) · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title