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Ultrasonic peening method and floating building

A construction method, ultrasonic technology, applied in shipbuilding, manufacturing tools, metal processing, etc., can solve the problems of reducing the compressive stress field, reducing the improvement effect of ultrasonic shot peening fatigue strength, etc., to achieve the reduction of suppression effect, high efficiency ultrasonic shot peening The effect of construction

Active Publication Date: 2012-12-26
JAPAN MARINE UNITED CORP +2
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Problems solved by technology

Therefore, there is the following problem: even if the ultrasonic shot peening is carried out in the construction stage on land to form a compressive stress field at the welded part, the tensile stress field formed by the buoyancy after launching somewhere reduces the compressive stress field and reduces the ultrasonic shot peening zone. The improved effect of fatigue strength

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  • Ultrasonic peening method and floating building
  • Ultrasonic peening method and floating building
  • Ultrasonic peening method and floating building

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Embodiment Construction

[0067] Next, an embodiment of the present invention will be described using FIGS. 1 to 4 . Here, Fig. 1 shows the ultrasonic shot blasting construction method of the embodiment of the present invention, Figure 1A is the building construction process, Figure 1B It is a structure welding process, Figure 1C It is the building launching process, Figure 1D It is the ultrasonic shot peening process. FIG. 2 is a diagram showing a floating structure according to an embodiment of the present invention, Figure 2A Represents a side view of a container ship, Figure 2B The above diagram representing a container ship. image 3 It is an enlarged perspective view of part III in FIG. 2 . Fig. 4 is a schematic diagram for explaining the ultrasonic shot peening process, Figure 4A A perspective view showing a welded part before ultrasonic shot peening, Figure 4B A perspective view showing a welded portion during ultrasonic shot peening, Figure 4C A perspective view showing a weld...

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Abstract

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.

Description

technical field [0001] The present invention relates to an ultrasonic shot blasting construction method and a floating structure, in particular to an ultrasonic shot blasting construction method suitable for floating structures such as container ships and a floating construction with ultrasonic shot peening carried out by the ultrasonic shot blasting construction method things. Background technique [0002] Currently, ultrasonic impact treatment (hereinafter referred to as "ultrasonic shot peening") is known as a technique for improving the fatigue strength of welded parts of structures such as ships, offshore equipment, and bridges. This technology is to use ultrasonic waves as a vibration source and continuously hit the welded part with a pin with a radius R at the front end to form a residual compressive stress field, improve the shape of the weld toe by transferring the R shape of the pin, and improve the fatigue strength of the weld toe (for example, Refer to Patent Do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/00B24C1/10B63B9/06C21D7/06
CPCB24B39/006B23K2203/04C21D9/50C21D7/06B23K31/02B23K31/00B23K2201/18B63B9/06B24B1/04B23K2101/18B23K2103/04B63B73/43
Inventor 毛利雅志冈田哲男出口贵则下田太一郎原纯哉稻村文秀加野大地福冈哲二小汐启介
Owner JAPAN MARINE UNITED CORP
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