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Method for welding large-size thin-walled beryllium piece and aluminum alloy ring

A welding method and technology of aluminum alloy, applied in welding equipment, electron beam welding equipment, metal processing equipment, etc., can solve the problem of large penetration of welded joints, complicated pre-welding treatment process, and not suitable for large-sized thin-walled beryllium sheets and Aluminum alloy ring group welding and other problems, to achieve the effect of reducing welding deformation and reducing welding deformation

Active Publication Date: 2020-06-02
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned welding method for beryllium has complicated pre-weld treatment process, the application range of the obtained welded joint is limited, and it is not suitable for assembly welding between large-scale thin-walled beryllium sheets and aluminum alloy rings; therefore, it is urgent to design a large-size The welding method of the thin-walled beryllium sheet and the aluminum alloy ring is not only easy to operate, but also can control its deformation without welding cracks, and the welding joint has a large penetration depth, and it is especially suitable for welding methods used in high ambient temperatures. important

Method used

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  • Method for welding large-size thin-walled beryllium piece and aluminum alloy ring
  • Method for welding large-size thin-walled beryllium piece and aluminum alloy ring
  • Method for welding large-size thin-walled beryllium piece and aluminum alloy ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In Example 1, the specification of the beryllium sheet 1 is Φ90mm×1.2mm, the inner diameter of the aluminum alloy ring 2 is Φ90mm, and the ring width is 4mm.

[0055] A kind of welding method of large-scale thin-walled beryllium sheet and aluminum alloy ring of embodiment 1, comprises the following steps:

[0056] S1. Cleaning steps: use pickling and acetone / alcohol scrubbing to clean the parts to be assembled and welded between the beryllium sheet 1 and the aluminum alloy ring 2 to make the surface clean;

[0057] S2. Tack welding and clamping steps: Nest the beryllium sheet 1 in the aluminum alloy ring 2, and the beryllium sheet 1 and the aluminum alloy ring 2 are fitted together, and the beryllium sheet and the aluminum alloy ring are fixed and clamped by using positioning pliers 4 On the turntable 3, there are four positioning tongs 4, which are distributed in a circular array;

[0058] S3, tack welding preheating step: preheat the beryllium sheet 1 by vacuum elect...

Embodiment 2

[0065] In Example 2, the specification of the beryllium sheet 1 is Φ180mm×1.4mm, the inner diameter of the aluminum alloy ring 2 is Φ180mm, and the ring width is 4.5mm.

[0066] The welding method of a kind of large-scale thin-walled beryllium sheet and aluminum alloy ring of embodiment 2 comprises the following steps:

[0067] S1. Cleaning steps: use pickling and acetone / alcohol scrubbing to clean the parts to be assembled and welded between the beryllium sheet 1 and the aluminum alloy ring 2 to make the surface clean;

[0068] S2. Tack welding and clamping steps: Nest the beryllium sheet 1 in the aluminum alloy ring 2, and the beryllium sheet 1 and the aluminum alloy ring 2 are fitted together, and the beryllium sheet and the aluminum alloy ring are fixed and clamped by using positioning pliers 4 On the turntable 3, there are six positioning tongs 4, which are distributed in a circular array;

[0069] S3, tack welding preheating step: preheat the beryllium sheet 1 by vacuum...

Embodiment 3

[0076] In Example 3, the specification of the beryllium sheet 1 is Φ200mm×1.5mm, the inner diameter of the aluminum alloy ring 2 is Φ200mm, and the ring width is 5mm.

[0077] A kind of welding method of large-scale thin-walled beryllium sheet and aluminum alloy ring of embodiment 3 comprises the following steps:

[0078] S1. Cleaning steps: use pickling and acetone / alcohol scrubbing to clean the parts to be assembled and welded between the beryllium sheet 1 and the aluminum alloy ring 2 to make the surface clean;

[0079] S2. Tack welding and clamping steps: Nest the beryllium sheet 1 in the aluminum alloy ring 2, and the beryllium sheet 1 and the aluminum alloy ring 2 are fitted together, and the beryllium sheet and the aluminum alloy ring are fixed and clamped by using positioning pliers 4 On the turntable 3, there are six positioning tongs 4, which are distributed in a circular array;

[0080] S3, tack welding preheating step: preheat the beryllium sheet 1 by means of vac...

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Abstract

The invention discloses a method for welding a large-size thin-walled beryllium piece and an aluminum alloy ring, and belongs to the technical field of welding methods for beryllium pieces and aluminum alloy rings. The method for welding the large-size thin-walled beryllium piece and the aluminum alloy ring includes the following steps that positioned welding clamping is carried out, the berylliumpiece is nested in the aluminum alloy ring in a fit manner, and the beryllium piece and the aluminum alloy ring are clamped on a rotary table by positioning pincers; positioned welding is carried out, symmetrical positioned welding is conducted on the beryllium piece and the aluminum alloy ring by vacuum electron beam welding to form a positioned welding assembly; full weld clamping is carried out, the positioning pincers are disassembled, and the aluminum alloy ring of the positioned welding assembly is clamped on the rotary table by a positioning ring; and full welding is carried out, fullwelding is conducted on the beryllium piece and the aluminum alloy ring by vacuum electron beam welding to form a full welding assembly. Welding deformation of the beryllium piece and the aluminum alloy ring in the welding process can be restrained, welding cracks are not prone to occurring, and the obtained welded joint can also meet use requirements of high environment temperatures and other harsh environments.

Description

technical field [0001] The invention relates to a welding method for a large-size thin-walled beryllium sheet and an aluminum alloy ring, and belongs to the technical field of welding methods for a beryllium sheet and an aluminum alloy ring. Background technique [0002] Beryllium material has the characteristics of low density, high specific strength, high specific stiffness, and low thermal neutron absorption rate, and has been widely used in aviation, aerospace, instrumentation, nuclear industry and other fields. These applications may involve the welding of beryllium to other materials. However, the plasticity of beryllium is very poor, and its elongation is only about 3%. It is one of the most difficult materials to weld at present, and problems such as welding deformation and cracks are easy to occur during the welding process. When the diameter of the beryllium workpiece is large and the thickness is small, if the deformation of the workpiece is not controlled during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/04B23K15/00
CPCB23K15/0006B23K15/0013B23K15/002B23K15/0033B23K15/04
Inventor 李盛和吕学超窦作勇罗学健杨龙张志强郭兴根殷雪峰王晶
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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