Ultrasound-assisted heterogeneous material friction stirring lap-joint device and lap-joint method

A friction stir, heterogeneous material technology, used in welding/welding/cutting items, welding equipment, non-electric welding equipment, etc., can solve problems such as insufficient plastic flow, internal defects, hook defects, etc. The effect of eliminating groove defects and improving joint structure

Inactive Publication Date: 2018-02-16
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in friction stir welded joints of dissimilar materials, problems such as continuous brittle phases, internal defects, hook defects, and insufficient plastic flow still exist.

Method used

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  • Ultrasound-assisted heterogeneous material friction stirring lap-joint device and lap-joint method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as figure 1 As shown, an ultrasonic-assisted friction stir welding device for dissimilar materials in this embodiment includes an ultrasonic vibration device 1, a friction stir welding tool 2 and a movable worktable 3; an upper lap plate 4 and a lower lap plate 5 are formed The workpiece to be welded is fixed on the movable workbench 3 by a clamp, the friction stir welding tool 2 is placed above the overlapping area of ​​the workpiece to be welded, and the stirring needle of the friction stir welding tool 2 penetrates into the overlapping area, so that The rolling head of the ultrasonic vibrating device 1 acts on the overlapping area; the distance between the ultrasonic action center position of the rolling head of the ultrasonic vibrating device 1 and the welding center position of the stirring needle of the friction stir welding tool is 1000mm; the ultrasonic vibrating device 1 There is no direct rigid connection with the friction stir welding tool; the ...

Embodiment 2

[0028] Embodiment 2: This embodiment relies on the lapping device described in Embodiment 1 to realize, and this embodiment is realized through the following steps:

[0029] Step 1: Start the ultrasonic vibration device, and apply ultrasound to the starting position of the predetermined route;

[0030] Step 2: Start the friction stir welding tool, and insert the stirring needle at the starting position of the expected welding route;

[0031] Step 3: After the insertion is completed, the workbench runs along the established track to realize continuous welding;

[0032] Step 4: After the predetermined trajectory is completed, the stirring needle and the welding end position are separated from the weld;

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Abstract

The invention discloses an ultrasound-assisted heterogeneous material friction stirring lap-joint device and lap-joint method, and belongs to the technical field of welding. The technical scheme is characterized in that an ultrasonic device and a friction stirring welding device jointly act on a heterogeneous material joint, a continuous brittle phase in a traditional connection joint is broken, and effective connection of the heterogeneous material is achieved. The problems that due to the large material physical and chemical characteristic difference of the heterogeneous material joint, connection is difficult, and the inner defect and the continuous brittle phase are caused are solved, meanwhile, the material mobility and the welding temperature field in the friction stirring welding process of the heterogeneous material joint can be effectively improved, the hook structure, the heterogeneous material laminar flow, the groove defect and the continuous intermetallic compound in the heterogeneous material friction stirring joint are solved, the after-welding joint microstructure and the mechanical property are excellent, the trial range is wide, and the process operation is simple.

Description

technical field [0001] The invention relates to a friction stir lapping device and a lapping method for heterogeneous materials, in particular to an ultrasonic-assisted friction stir lapping device and a lapping method for heterogeneous materials, and belongs to the field of welding technology. Background technique [0002] In the fields of aviation, aerospace, and automobiles, new materials such as aluminum alloys, titanium alloys, ceramic materials, and composite materials have the advantages of high specific strength, high fracture toughness, etc., due to the consideration of weight reduction, cost reduction, and special performance. And was widely used. In the design of composite structures of dissimilar materials, the connection between the two is the key. It is difficult to meet the requirements of structural tightness and service performance by mechanical methods to connect dissimilar materials. In actual production, welding methods are widely used to realize the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/10B23K20/22
CPCB23K20/122B23K20/10B23K20/22B23K2103/18
Inventor 周利于明润蒋智华杨海峰黄永宪冯吉才
Owner HARBIN INST OF TECH AT WEIHAI
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