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Friction stir welding method for aluminum alloy with fusion welding positioning welding seams

A technology of friction stir welding and tack welding, which is applied in the direction of welding/welding/cutting items, welding equipment, non-electric welding equipment, etc. It can solve the problems of difficult control of the joint group gap, unstable welding quality of friction stir welding, and high tooling requirements. , to achieve the effect of solving strict assembly clearance requirements, improving stability, product qualification rate and high production efficiency

Inactive Publication Date: 2018-09-28
辽宁忠旺铝合金精深加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, in order to solve the problems in the existing friction stir welding welding process, such as difficult control of the gap between joint groups, unstable friction stir welding welding quality, and high requirements for tooling, the present invention provides a welding machine with fusion welding positioning welds. Aluminum Alloy Friction Stir Welding Method

Method used

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  • Friction stir welding method for aluminum alloy with fusion welding positioning welding seams
  • Friction stir welding method for aluminum alloy with fusion welding positioning welding seams
  • Friction stir welding method for aluminum alloy with fusion welding positioning welding seams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of friction stir welding method of aluminum alloy with fusion welding tack weld figure 1 As shown, the method includes the following steps:

[0035] The specifications of the welding material of the workpiece to be welded are 6005A-T6 aluminum alloy extruded profiles of 2000mm*150mm*6mm, and the mass fraction of its chemical composition is shown in Table 1:

[0036] Table 1

[0037] Si

Mg

Fe

Cu

mn

Cr

Ti

Zn

Al

other

0.66

0.53

0.16

0.14

0.26

0.16

0.02

0.02

98.02

margin

[0038] A. Cleaning before welding:

[0039] a. Pre-cleaning: Use non-woven fabric to dip acetone or ethanol on the groove surface of the joint of two 6005A-T6 aluminum alloy profiles to be welded and the nearby 25mm area to clean the oil and dust on the surface of the workpiece to be welded;

[0040] b. Removal of oxide film: use an electric wire bowl brush to polish the groove surface of the welded joint of the pr...

Embodiment 2

[0052] The difference between embodiment 2 and embodiment 1 is that the welding process parameters of MIG fusion welding in step D are as shown in table 4:

[0053] Table 4

[0054] Welding method

filler metal

Wire diameter

Welding current

welding voltage

welding speed

Argon flow

MIG

ER5356

1.2mm

120A

19V

400mm / min

23L / min

[0055] The welding process parameters of friction stir welding in step F are as shown in Table 5:

[0056] table 5

[0057] Welding method

Embodiment 3

[0059]The difference between embodiment 3 and embodiment 1 is that the welding process parameters of MIG fusion welding in step D are as shown in table 6:

[0060] Table 6

[0061] Welding method

filler metal

Wire diameter

Welding current

welding voltage

welding speed

Argon flow

MIG

ER5356

1.2mm

150A

20V

500mm / min

27L / min

[0062] The welding process parameters of friction stir welding in step F are as shown in Table 7:

[0063] Table 7

[0064] Welding method

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Abstract

The invention belongs to the technical field of welding, and relates to a friction stir welding method for an aluminum alloy with fusion welding positioning welding seams. The friction stir welding method comprises the steps that a to-be-welded workpiece is subjected to pre-welding cleaning; the to-be-welded workpiece is coupled and assembled through a clamping tool; a groove is formed in a pre-welded point-fixed position; the groove is subjected to positioning welding; the welding seams are ground and cleaned; and the welding seams of the to-be-welded workpiece are subjected to friction stirwelding. A series of problems that in an existing friction stir welding process, joint coupled gaps are not liable to be controlled, the friction stir welding quality is unstable, and the requirementfor a tool is high are solved.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to an aluminum alloy friction stir welding method with fusion welding positioning welds. Background technique [0002] Friction stir welding is a solid-phase joining method proposed by the British Welding Institute in 1991. It has the advantages of beautiful welded joints, good comprehensive mechanical properties, small welding deformation, green environmental protection, and no welding materials. It is suitable for aluminum alloy welding. It has been widely promoted and applied in the fields of shipbuilding, aviation, aerospace and rail transportation. [0003] However, due to its technical characteristics, friction stir welding has extremely high requirements on the gap between the workpiece group, and rigid clamping of tooling is often used in production to achieve normal compression and lateral jacking. In some cases, tooling fixtures are not enough to meet the requirements or S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/26B23K103/10
CPCB23K20/12B23K20/26
Inventor 田春雨孙巍康铭徐玉君韩文宇金文福郭廷凯韦宝权杨睿
Owner 辽宁忠旺铝合金精深加工有限公司
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