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Method and device for dissimilar metal friction-stir welding

A technology of friction stir welding and friction stir, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve problems such as poor welding effect, reduce the generation of intermetallic compounds, reduce welding stress, Avoid the effect of prefilling

Inactive Publication Date: 2020-06-26
HARBIN WANZHOU WELDING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor welding effect when the welding performance of the existing materials is relatively large, the present invention further provides a method for friction stir welding of dissimilar metals

Method used

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  • Method and device for dissimilar metal friction-stir welding
  • Method and device for dissimilar metal friction-stir welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The friction stir welding method for dissimilar metals butt-filling static shaft shoulders in this embodiment specifically includes the following steps:

[0034] Step 1. Clamp the plate to be welded on the fixture of the friction stir welding machine, and reserve a wire filling gap between the two plates to be welded. When the welding wire is filled into the reserved gap, the welding wire is positioned and pressed by the static shoulder. , the thickness of the plate to be welded is L, and the reserved wire filling gap is h, h=0.1L.

[0035] Step 2: Install the stirring tool and the stationary shoulder, select a suitable welding wire according to the material of the plate to be welded, and send the welding wire to the reserved gap through the wire feed wheel in the stationary shoulder; a wire feeder is installed in the stationary shoulder The wire feeding mechanism sends the welding wire to the reserved gap before the stirring head arrives, and presses the welding wire i...

Embodiment 2

[0040] The friction stir welding method for dissimilar metals butt-filling static shaft shoulders in this embodiment specifically includes the following steps:

[0041] Step 1. Clamp the plate to be welded on the fixture of the friction stir welding machine, and reserve a wire filling gap between the two plates to be welded. When the welding wire is filled into the reserved gap, the welding wire is positioned and pressed by the static shoulder. The thickness of the plate to be welded is L, and the reserved wire filling gap is h, h=1.5L.

[0042] Step 2: Install the stirring tool and the stationary shoulder, select a suitable welding wire according to the material of the plate to be welded, and send the welding wire to the reserved gap through the wire feed wheel in the stationary shoulder; a wire feeder is installed in the stationary shoulder The wire feeding mechanism sends the welding wire to the reserved gap before the stirring head arrives, and presses the welding wire int...

Embodiment 3

[0047] The friction stir welding method for dissimilar metals butt-filling static shaft shoulders in this embodiment specifically includes the following steps:

[0048] Step 1. Clamp the plate to be welded on the fixture of the friction stir welding machine, and reserve a wire filling gap between the two plates to be welded. When the welding wire is filled into the reserved gap, the welding wire is positioned and pressed by the static shoulder. The thickness of the plate to be welded is L, and the reserved wire filling gap is h, h=L.

[0049] Step 2: Install the stirring tool and the stationary shoulder, select a suitable welding wire according to the material of the plate to be welded, and send the welding wire to the reserved gap through the wire feed wheel in the stationary shoulder; a wire feeder is installed in the stationary shoulder The wire feeding mechanism sends the welding wire to the reserved gap before the stirring head arrives, and presses the welding wire into t...

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Abstract

The invention relates to a method for dissimilar metal friction-stir welding. The method specifically comprises the following steps: step I of clamping to-be-welded boards onto a clamp of a friction-stir welding machine, and reserving a wire filling gap between the two to-be-welded boards; step II, mounting a stirring tool and a static shaft shoulder, selecting a proper welding wire according to the material of the to-be-welded boards, and feeding the welding wire into the reserved seam through a wire feeding wheel in the static shaft shoulder; step III, setting welding parameters, and starting the welding machine and the wire feeding mechanism to weld; and step IV, withdrawing the wire feeding mechanism to pull off the welding wire after welding is accomplished, stopping the wire feedingmechanism, and stopping the welding machine. The method adopts a static shaft shoulder way to weld. The static shaft shoulder can provide relatively great upsetting force to a welding seam region, andexcessive welding heat is absorbed to refine crystal grains; and structural binding strength is improved through extra upsetting force provided by the static shaft shoulder, so that quality of a welding joint is improved.

Description

technical field [0001] The invention relates to the field of friction stir welding, in particular to a method and device for friction stir welding of dissimilar metals butt-filling static shaft shoulders. Background technique [0002] Many auto companies use aluminum alloys instead of steel to reduce vehicle weight, thereby achieving energy conservation and emission reduction. Therefore, the welding quality of aluminum-steel is an important factor affecting the structure of aluminum-steel. In the process of friction stir butt welding of dissimilar materials such as aluminum and steel, due to the large difference in the thermophysical properties of the two materials, it is easy to burn through one side when using traditional fusion welding for welding. As an advanced joining technology, friction stir welding has the advantages of high welding quality, low welding stress, green and pollution-free, and is widely used in the connection of dissimilar materials. However, for mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/227B23K103/20
CPCB23K20/122B23K20/1245B23K20/2275B23K2103/20
Inventor 万龙温琦黄体方孙光辉吴立刚
Owner HARBIN WANZHOU WELDING TECH CO LTD
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