Pre-welding anti-deformation device and method for dual-laser beam both-side simultaneous welding of 5A90 aluminum-lithium alloy T-shaped structure
An aluminum-lithium alloy and laser beam technology, applied in laser welding equipment, auxiliary devices, welding equipment, etc., can solve problems such as inability to adapt to needs, achieve the effects of preventing welding deformation, improving post-welding deformation, and improving mechanical properties
Inactive Publication Date: 2020-10-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0005] For the angular deformation of aluminum-lithium alloy double laser beam bilateral simultaneous welding, commonly used deformation control methods such as rigid fixation, cooling with welding, and post-weld correction cannot meet the needs
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[0020] The present invention provides a pre-welding anti-deformation device and method for double-sided synchronous welding of 5A90 aluminum-lithium alloy T-shaped structure with double laser beams. In order to make the purpose, effect and technical solution of the present invention more clear, refer to the accompanying drawings and compare the examples The present invention will be described in detail. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.
[0021] The present invention will be described in detail below through specific examples and in conjunction with the accompanying drawings.
[0022] The skin material of the double-laser beam bilateral synchronous welding of the T-shaped joint is 5A90 aluminum-lithium alloy, with a size of 405mm×60mm×2.5mm; in addition, the material of the stringer of the T-shaped joint is also 5A90 aluminum-lithium alloy, and the size is...
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Abstract
The invention relates to a pre-welding anti-deformation device and method for dual-laser beam both-side simultaneous welding of a 5A90 aluminum-lithium alloy T-shaped structure. The method comprises the following steps of adjusting the height of each bracket of a welding tooling platform before welding to ensure the levelness of the platform surface, placing a single-stringer T-shaped joint fixture on the platform, placing two thin aluminum sheets on the upper surface of the single-stringer T-shaped joint fixture, placing skin material on top of the thin aluminum sheets to form an included angle phi equal to 1.7 degrees with the upper surface of the fixture to eliminate post-welding deformation; placing the stringer perpendicular to the skin, and using the single-stringer T-shaped joint fixture to clamp the stringer to ensure that the position of the stringer is fixed relative to the skin; and using a flexible clamp to act in the middle of the skin to prevent the middle part of the skin from being arched after welding. The pre-welding anti-deformation device and method provided by the invention aim at the post-welding deformation problem of the dual-laser beam double-side synchronous welding adopted in the 5A90 aluminum-lithium alloy T-shaped structure, and obtain a T-shaped joint with good weld formation and no obvious welding deformation by presetting an anti-deformation angle before welding.
Description
technical field [0001] The invention relates to a pre-welding anti-deformation device and method for double-side synchronous welding of a T-shaped structure of a 5A90 aluminum-lithium alloy and belongs to the technical field of aluminum alloy welding deformation control. Background technique [0002] Due to a series of advantages such as low density, high elastic modulus, high specific strength, and good stress corrosion resistance, aluminum-lithium (Al-Li) alloys can be used in aerospace products to reduce aircraft body structure and reduce manufacturing and maintenance costs. Therefore, aluminum-lithium alloy is considered to be an ideal lightweight structural material for aerospace. [0003] Laser welding technology is currently a relatively advanced connection technology. Laser has the characteristics of high energy density, fast welding speed, small heat input, and good flexibility. At present, the European Airbus has successfully applied laser welding technology to th...
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IPC IPC(8): B23K26/26B23K26/70B23K37/04B23K31/00C22C21/08
CPCB23K26/26B23K31/003B23K37/0435B23K26/702C22C21/08
Inventor 占小红李云夏令余海松封小松夏佩云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS