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Connecting method of steel-aluminum composite joints for naval ship

A steel-aluminum composite, joint connection technology, applied in welding/welding/cutting items, welding equipment, welding accessories, etc., can solve problems such as easy cracking at joints, reduce welding defects, stably control welding heat input, and improve effect of force

Inactive Publication Date: 2020-10-13
CHINA SHIP DEV & DESIGN CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a steel-aluminum composite joint connection method for ships, which can ensure the effective connection of steel bulkheads and aluminum alloy bulkheads at the steel-aluminum joints. It can also solve the problem that the joints are easy to crack due to improper welding methods

Method used

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  • Connecting method of steel-aluminum composite joints for naval ship
  • Connecting method of steel-aluminum composite joints for naval ship
  • Connecting method of steel-aluminum composite joints for naval ship

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] Such as figure 2 As shown, the butt connection method of steel-aluminum composite joints includes the following steps:

[0030] Step 1. Open semi-oblong holes with a size of 15mm×5mm and a chamfering radius of R5mm on the steel wall 20 and the aluminum alloy wall 30 respectively. The length of the opening can be adjusted according to the size of the weld leg and the butt gap, but it should be ensured that the distance between the end of the opening and the end wall of the weldment is greater than the size of the weld leg. This can ensure that the fillet welding at the end of the bulkhead is completed without damaging the boundary layer of the steel-aluminum composite joint, and avoiding the delamination of the boundary layer due to the welding effect.

[0031] Step 2. Set a gap of 6mm at the butt joint of the steel-aluminum composite joint 10, then weld the steel layer 11 of the steel-aluminum composite joint 10 to the steel wall 20, weld the aluminum alloy layer 13 t...

no. 2 example

[0036] Such as Figure 4 As shown, the steel-aluminum composite joint 10 is connected by fillet connection, including the following steps:

[0037] Step 1. Cut two steel-aluminum composite joints 10 at angles of 45 degrees at the ends of the corner joints.

[0038] Step 2. Open fan-shaped openings with chamfering radius R10mm on the steel wall 20 and the aluminum alloy wall 30 respectively. The radius of the fan-shaped opening can be adjusted according to the size of the weld leg and the butt joint gap, but it should be ensured that the distance between the end of the opening and the end wall of the weldment is greater than the size of the weld leg.

[0039] Step 3. Set a gap of 6mm at the fillet connection of the steel-aluminum composite joint 10, then weld the steel layer 11 of the steel-aluminum composite joint 10 to the steel wall 20, weld the aluminum alloy layer 13 to the aluminum alloy wall 30, and not weld the gap. When welding, arc starting small blocks 40 and arc e...

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Abstract

The invention relates to a connecting method of steel-aluminum composite joints for a naval ship. The connecting method comprises the steps that S1, openings are formed in areas, corresponding to thejunction between the steel-aluminum composite joints, of a steel wall and an aluminum alloy wall correspondingly to ensure that the distance from the ends of the openings to the end of a welding partis larger than the size of a welding foot; S2, a certain gap is formed in the junction between the steel-aluminum composite joints, then a steel layer of the steel-aluminum composite joint is welded to the steel wall, an aluminum alloy layer is welded to the aluminum alloy wall, the gap is not welded, and during welding, an arc-striking small block and an arc-extinguishing small block are arrangedon the two sides of a groove correspondingly; S3, angle-wrapping welding is carried out at the openings; and S4, the gap between the two steel-aluminum composite joints is injected and filled with structural adhesive to ensure the sealing performance of a welded seam. The ends of the openings of a bulkhead are subjected to angle-wrapping welding, effective connection between the bulkhead and thesteel-aluminum composite joints can be ensured while cracking of the steel-aluminum composite joints due to welding is avoided, through angle-wrapping welding, water vapor and the like are prevented from entering the welded seam along the ends of the openings, meanwhile, the force bearing condition of the ends can be improved, and stress concentration is avoided.

Description

technical field [0001] The invention relates to the technical field of hull structure design, in particular to a steel-aluminum composite joint butt joint and fillet joint connection method for ships. Background technique [0002] Due to the characteristics of low density, high strength, high stiffness and corrosion resistance, aluminum alloys are widely used in light and secondary bulkheads of ships. The deck material of a ship is usually steel. In order to connect the aluminum alloy bulkhead to the deck, steel-aluminum composite joints are usually used. Such as figure 1 As shown, the steel-aluminum composite joint 10 is formed by explosive welding of three materials: a steel layer 11, an aluminum layer 12, and an aluminum alloy layer 13. When connecting specifically, the steel layer 11 of the steel-aluminum composite joint 10 is connected to the steel wall 20, and the aluminum alloy Layer 13 is connected to aluminum alloy wall 30 . The width and thickness of the steel l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/235B23K9/32B23K33/00B23K103/20
CPCB23K9/02B23K9/235B23K9/32B23K33/00B23K2103/20
Inventor 汤刚梅国辉骆伟朱明罡闫小顺
Owner CHINA SHIP DEV & DESIGN CENT
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