Fire-water correcting technology of aluminum-magnesium alloy ship

A technology of aluminum-magnesium alloy and aluminum alloy plate, which is applied in the field of deformation correction and can solve problems such as not advocating the use

Active Publication Date: 2007-09-05
JIANGNAN SHIPYARD GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of water and fire correction with higher temperature is not recommended

Method used

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  • Fire-water correcting technology of aluminum-magnesium alloy ship
  • Fire-water correcting technology of aluminum-magnesium alloy ship
  • Fire-water correcting technology of aluminum-magnesium alloy ship

Examples

Experimental program
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Effect test

Embodiment 1

[0040] As shown in Figures 1 to 3, it is the phenomenon of "thin horse" bulging at the skeleton welding place that is often encountered in the hull plate or superstructure. The "thin horse" of the aluminum boat can even bulge up to 3mm, and its correction procedure is shown in Figure 8. The rectification method adopts linear heating, uses oxygen-acetylene mixed gas and medium nozzle as heating tool, and uses small tap water leather tube with control switch as cooling water tool. The process method is to use oxygen-acetylene flame to heat the aluminum plate, And then cooled with water, the distance between the flame and the aluminum plate is 30mm, the moving speed of the flame is 1500mm / min, the minimum distance between the flame and the cooling water is 40mm, and the heating temperature is controlled at 170-175°C. For the back of the B-shaped skeleton Backfire along the skeleton line, and backfire the back of the A-shaped skeleton along both sides of the skeleton line. After ...

Embodiment 2

[0042] As shown in Figures 4 to 5, the undulating wave deformation of the plate frame often occurs in the thin plate structure of the aluminum ship hull. The distance between the "peak" and "valley" of the wave can reach 15mm or even 25mm. This kind of deformation correction method is also mainly carried out by linear heating. Oxygen-acetylene mixed gas and a medium-sized nozzle are used as heating tools, and a small-sized tap water leather tube with a control switch is used as a cooling water tool. The process method is to use an oxy-acetylene flame to heat the aluminum plate, and then cool it with water. The flame The distance from the aluminum plate is 25mm, the moving speed of the flame is 1400mm / min, the minimum distance between the flame and the cooling water is 50mm, and the heating temperature is controlled at 165-170°C. In the first stage, at the skeletons on both sides of the protruding surface, the linear heating method is used for back burning, and gradually moves ...

Embodiment 3

[0044] Referring to Figures 6-7, it is the local bulging deformation of the hull. The thickness of the aluminum alloy plate is 6mm, and the dot-type heating method can be used for water and fire correction. Oxygen-acetylene mixed gas and medium-sized nozzles are used as heating tools, and Use a small tap water hose with a control switch as a cooling water tool. The process method is to use an oxy-acetylene flame to heat the aluminum plate and then cool it with water. The distance between the flame and the aluminum plate is 20mm, and the circular movement angular velocity of the flame is 120° / second, the minimum distance between the flame and the cooling water is 60mm. The heating temperature is controlled at 245-250°C. The diameter of the dot D=4t+10mm (t represents the plate thickness), but not more than 60mm, a=200~400mm, b=100~200mm. The heating starts from the place with small deformation, and moves to the place with large deformation in sequence. During the heating pro...

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Abstract

A water-fire technique for correcting the deformation of ship body made of Al-alloy features that after the deformed Al-alloy plate is heated by oxy-acetylene flame it is cooled by water. The distance between Al-alloy plate and flame is 20-30 mm. The moving speed of flame is 1200-1500 mm / min. The minimal gap between flame and cooling water is 40-60 mm.

Description

technical field [0001] The invention belongs to the field of deformation correction, and is a technology for correcting smoothness or smoothness on the shell or inner wall of an aluminum hull. Background technique [0002] Using aluminum alloy as the hull structure material can greatly reduce the weight of the hull, so that the speed can be increased under the same power of the main engine. It is generally used for high-speed ships. In recent years, some domestic shipyards have begun to build aluminum high-speed ships, thus breaking the state of dependence on imports of high-speed ships. [0003] As an aluminum alloy material for shipbuilding, aluminum-magnesium alloys such as 5083H321 or H116 are commonly used in domestic and foreign aluminum high-speed ships. After cold work hardening, they have high strength and light bulk density (2.66t / m 3 ), but its coefficient of linear expansion is large, twice that of steel, so the hull is easily deformed during the construction pr...

Claims

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Application Information

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IPC IPC(8): B21D1/12B21D1/00
Inventor 唐志祥
Owner JIANGNAN SHIPYARD GRP CO LTD
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