Welding method for one-side welding double-face forming of aluminum alloy plates

A technology of single-sided welding and double-sided welding, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problem that there is no suitable welding method for aluminum alloy panel in narrow space, and achieve the effect of less welding pores

Inactive Publication Date: 2020-01-10
SHANGHAI SHIPBUILDING TECH RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a welding method suitable for single-sided welding and double-sided forming of aluminum alloy plates, so as to overcome the deficiency in the prior art that there is no suitable welding method for aluminum alloy panels in narrow spaces

Method used

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  • Welding method for one-side welding double-face forming of aluminum alloy plates
  • Welding method for one-side welding double-face forming of aluminum alloy plates
  • Welding method for one-side welding double-face forming of aluminum alloy plates

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Embodiment 1～3

[0025] Before welding, use mechanical methods to remove the oxide film on the surface within 30mm on both sides of the weld, and clean it with absolute ethanol. Welding should be carried out under the condition that the ambient temperature is not less than 0°C and the relative humidity is not higher than 85%. Welding adopts single-sided multi-layer multi-pass welding method, which is divided into root welding and cover welding; the welding process parameters of Examples 1-3 are shown in Table 1.

[0026] The welding process parameter of table 1 embodiment 1~3

[0027]

[0028] During multi-layer multi-pass welding, the temperature between passes is strictly controlled at about 50°C, and the heat input of welding is controlled at 3.9-5.8KJ / cm; After the welding is completed, use a milling cutter to clean the weld seam before proceeding to the next welding. When the multi-joint arc is started, use a milling cutter to grind the arc ending point, start the arc before the arc e...

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Abstract

The invention provides a welding method for one-side welding double-face forming of aluminum alloy plates. The welding method is characterized in that the two aluminum alloy plates are subjected to MIG welding at a mean position, a symmetric one-face V-type groove is adopted, the one-side angle of the groove is 30 degrees-35 degrees, the bottom gap width of the groove is 5 mm-7 mm, and a stainlesssteel or aluminum alloy liner is additionally arranged on the back face. The method is especially suitable for one-side welding double-face forming of 6 mm 5083-H116 aluminum alloys, and the problemabout welding in a narrow space of a ship is solved; the appearance of a weld joint meets the quality requirements, and no remarkable surface defects exist; and welding air pores are fewer, and the internal quality X-ray detection grade of the weld joint is not lower than the grade I.

Description

technical field [0001] The invention belongs to the technical field of welding aluminum alloy materials, and in particular relates to a welding method for single-side welding and double-side forming of aluminum alloy plates. Background technique [0002] Due to its small specific gravity, good corrosion resistance, and easy processing, aluminum alloys are widely used in ships. At present, aluminum alloy materials for ships in my country are mainly 5083 plates and 6082 profiles. With the increase of ships' requirements on speed, loading capacity and structural weight, the demand for high-strength and corrosion-resistant aluminum alloys is becoming more and more urgent. [0003] Many ships in service in my country have cracks in varying degrees in the empty space ribs and side longitudinals. The cracks and cracks are mainly concentrated in the longitudinals and brackets, and a small part of them appear in the floors. The main forms of damaged welds are cracks or breaks at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/23B23K35/28
CPCB23K9/173B23K9/23B23K35/288
Inventor 兰玲阎璐蒋荣勤王高飞宋金英朱国斌周鸿翔
Owner SHANGHAI SHIPBUILDING TECH RES INST
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