ULTRASONIC PEENING METHOD AND FLOATING BUILDING

• Main Authors: DEGUCHI, TAKANORI, KANO, DAICHI, KOSHIO, KEISUKE, SHIMODA, TAICHIRO, FUKUOKA, TETSUJI, INAMURA, FUMIHIDE, MOURI, MASASHI, OKADA, TETSUO, HARA, JUNYA
• Format: Patent
• Language: English; French; Japanese
• Published: 20.10.2011
• Subjects: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; EQUIPMENT FOR SHIPPING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GRINDING; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; POLISHING; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

An ultrasonic peening method which, in order to improve the fatigue strength of the weld (3) between a floating building (1) and a structure (2) welded to the floating building (1), applies an impact to the weld (3) by a pin (4) vibrated by an ultrasonic wave. The ultrasonic peening method comprises: a building construction step for constructing the floating building (1); a structure welding step for attaching the structure (2) to the floating building (1) by welding; a building launching step for lowering the floating building (1), to which the structure (2) has been attached, into water; and an ultrasonic peening step for applying ultrasonic peening to the weld (3) of the floating building (1) having buoyancy. La présente invention concerne un procédé de martelage ultrasonique qui, afin d'améliorer la résistance à la fatigue du soudage (3) entre une construction flottante (1) et une structure (2) soudée à la construction flottante (1), applique un impact au soudage (3) au moyen d'une broche (4) amenée en vibration par le biais d'une onde ultrasonique. Le procédé de martelage ultrasonique comprend : une étape de construction de bâtiment pour construire la construction flottante (1) ; une étape de soudage de structure pour fixer la structure (2) à la construction flottante (1) par soudage ; une étape de lancement à l'eau de la construction pour faire descendre la construction flottante (1) à laquelle la structure (2) a été fixée dans l'eau ; et une étape de martelage ultrasonique pour appliquer un martelage ultrasonique au soudage (3) de la construction flottante (1) ayant une bouée.