Water jet peening device
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTakaharu Maeguchi, Yuichiro Nomura, Kazuya Tsutsumi, Nobuyuki Hori
Life of this patent
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Abstract
A water jet peening device includes a sealed vessel provided to cover a surface of a welded portion, and adapted to be in a sealed state where an internal pressure is higher than an outside, a jet nozzle adapted to jet high-pressure water to create a cavitation bubble toward the surface of the welded portion, inside the sealed vessel, and a pressure control hole adapted to be able to adjust the internal pressure of the sealed vessel. The water jet peening device can efficiently reform a tensile residual stress on the surface of the welded portion to a compressive residual stress.
Claims10
A water jet peening device comprising:
- a jet nozzle adapted to jet a high-pressure fluid to create a cavitation bubble toward a surface to be executed;
- and
- a screen arranged in a periphery of the jet nozzle, wherein
- the jet nozzle diagonally jets the fluid against the surface to be executed, and
- the screen is arranged on the surface to be executed, the surface to be executed being positioned at a downstream side in a flow direction of the fluid jetted against and flowing on the surface to be executed,
- wherein the screen is formed into an arc shape that surrounds the jet nozzle.
A water jet peening device comprising:
- a jet nozzle adapted to jet a high-pressure fluid to create a cavitation bubble toward a surface to be executed;
- a screen arranged in a periphery of the jet nozzle;
- and
- a rotation mechanism adapted to relatively rotate the screen centered at the jet nozzle, wherein
- the jet nozzle diagonally jets the fluid against the surface to be executed, and
- the screen is arranged on the surface to be executed, the surface to be executed being positioned at a downstream side in a flow direction of the fluid jetted against and flowing on the surface to be executed.
Dependencies are inferred from the claim text.