Automatic welding method for aluminum alloy thin plates

A welding method and aluminum alloy technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve problems such as unsatisfactory results, large residual stress, and large deformation of the base metal, so as to improve the quality of MIG welding and reduce the welding layer The effect of small number and welding deformation

Active Publication Date: 2018-09-18
辽宁忠旺铝合金精深加工有限公司
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Problems solved by technology

[0005] In view of this, the present invention solves the problem that large residual stress is easily generated when MIG welding is used to weld aluminum alloy sheets in the prior art, resulting in large deformation of the base metal after welding. Although fine-tuning can be carried out through subsequent shaping, the result is still the same. Unsatisfactory problem, provide an automatic welding method for aluminum alloy sheet

Method used

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  • Automatic welding method for aluminum alloy thin plates
  • Automatic welding method for aluminum alloy thin plates
  • Automatic welding method for aluminum alloy thin plates

Examples

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Embodiment 1

[0027] An automatic welding method for aluminum alloy sheets, comprising the steps of:

[0028] A. Preparation before welding: The aluminum alloy thin plate profile is extruded integrally through an extrusion die. The cross-sectional structure of the aluminum alloy thin plate is as follows: figure 1 As shown, the aluminum alloy sheet profile after integral extrusion is cut equidistantly, wherein the width of the aluminum alloy sheet profile is 250mm, the thickness is 5mm, and the length is 3.5m;

[0029] B. Pretreatment: The groove form of the joint of the aluminum alloy sheet is designed as a Y-shaped groove with a depth of 3 mm on the front. The cross-sectional structure of the welding groove of the aluminum alloy sheet is as follows figure 2 As shown, the inclination angle of the groove is 30°. In this way, on the basis of ensuring that the weld strength meets the standard, the heat input of welding is minimized, and the oil on the surface of the aluminum alloy sheet is cl...

Embodiment 2

[0035] The difference between embodiment 2 and embodiment 1 is that in step D, a hydraulic clamping tool is provided at every 350 mm outside the aluminum alloy sheet.

Embodiment 3

[0037] The difference between embodiment 3 and embodiment 1 is that in step E, the welding current is 195A, the welding voltage is 18.5V, and the welding speed is 110cm / min.

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Abstract

The invention belongs to the technical field of welding, and relates to an automatic welding method for aluminum alloy thin plates. The automatic welding method comprises the steps of pre-welding preparation for equidistant cutting of the aluminum alloy thin plates, pre-treatment of a groove at the butt joint of the aluminum alloy thin plates, uniform clamping of a hydraulic clamping tool for thealuminum alloy thin plates, welding of the aluminum alloy thin plates after being clamped by the automatic welding method and post-welding shaping of small-scale flame repairing. The problems that inthe prior art, relatively large residual stress is prone to being generated when MIG is adopted to weld the aluminum alloy thin plates, large deformation of the base metal is generated after the completion of the welding, and subsequent shaping can be used for fine-tuning but the result is still not satisfactory are solved.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to an automatic welding method for aluminum alloy thin plates. Background technique [0002] With the rapid development of the high-speed railway industry in recent years, the welding of aluminum alloys for rail vehicles has become a new research hotspot. Aluminum alloy is the key material for the manufacture of high-speed EMUs. The welding quality of aluminum alloy is the basis for determining the long-term safe operation of high-speed trains, and is of great significance for improving the operating life of high-speed trains. As a key process in the manufacture of high-speed train bodies, aluminum alloy welding plays a very important role. How to improve the welding quality of aluminum alloy has become the key in the manufacture of aluminum alloy car body. Aluminum alloy thin-wall welded structures are light in weight, corrosion-resistant, excellent in processing performance, and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/235B23K37/04B23P15/00
CPCB23K9/173B23K9/235B23K37/0408B23P15/00
Inventor 齐芃芃张德伟徐鑫
Owner 辽宁忠旺铝合金精深加工有限公司
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