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

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Problems solved by technology

Therefore, the use of water and fire correcti

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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Example Embodiment

[0039] Example 1

[0040] As shown in Figures 1 to 3, the "thin horse" phenomenon frequently encountered in the welding of the skeleton of the hull shell or superstructure. The aluminum boat "thin horse" bulges even up to 3mm, and the correction procedure is shown in Figure 8. The correction method uses linear heating, using oxygen-acetylene mixed gas and medium nozzles as heating tools, and using small tap water pipes with operating switches as cooling water tools. The process method is to use oxygen-acetylene flames to heat the aluminum plate. And then water cooling, where 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℃. Back-burning is performed along the skeleton line, and the back of the A-type skeleton is back-burned along both sides of the skeleton line. After the rectification of the plate fr...

Example Embodiment

[0041] Example 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 the "valley" of the wave can reach 15mm or even 25mm. This kind of deformation correction method also adopts linear heating. Use oxygen-acetylene mixed gas and medium nozzles as heating tools, and use small tap water pipes with operating switches as cooling water tools. The process method is to use oxygen-acetylene flames to heat the aluminum plates and then cool them with water. The distance to 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℃. In the first stage, at the frameworks on both sides of the protruding surface, back-burning is carried out by linear heating, and gradually moves to the protruding height in parallel. In th...

Example Embodiment

[0043] Example 3

[0044] Refer to Figures 6-7, which shows the partial bulging deformation of the hull. The thickness of the aluminum alloy plate is 6mm. The dot-type heating method can be used for water and fire correction. The oxygen-acetylene mixed gas and the medium nozzle are used as heating tools. Use a small tap water hose with a control switch as a cooling water tool. The process is to use an oxygen-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 flame's circumferential movement angular velocity is 120° / Sec, the minimum distance between flame and cooling water is 60mm. The heating temperature is controlled at 245~250℃. The diameter of the dot is 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 where the deformation is small and moves to the place where the deformation is large in sequence. During t...

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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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