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US 6,855,208 B1Granted
Method and devices for peening and cleaning metal surfaces
AssigneeJapan Science and Technology Corporation
InventorHitoshi Soyama
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AssigneeJapan Science and Technology Corporation
InventorHitoshi Soyama
Estimating the term…
This invention relates to a metal part and other surface modification method suitable for the machining industry in which shot peening is typically used to refine the surface of a metal part (to introduce compressive residual stresses, to enhance fatigue strength, to harden the workpiece) and for fields in which parts need be cleaned. According to the present invention, workpiece W is placed within a first vessel which is filled with a fluid. The first vessel is pressurized by controlling the flow rate of the fluid flowing in the first vessel from nozzle 4 distant from said workpiece on the surface and of the fluid flowing from first vessel. Thus, the collapsing impact force of cavitation bubbles is increased so that the machined part will have its surface strengthened and cleaned by applying a peening effect to the surface of the part with said impact force.
A metal part and other surface modification and cleaning method, comprising the steps of placing the part within a first vessel, wherein the first vessel is filled with a first fluid, placing said first vessel within a second vessel, wherein the second vessel is filled with a second fluid, generating cavitation by injecting pressurized first fluid from a nozzle separated from said part surface in said first vessel so that the collapsing impact force of bubbles formed from the cavitation strengthens and cleans the surface of the treated part by applying a peening effect to the surface of the part;
A metal part and other surface modification device comprising:
Dependencies are inferred from the claim text.