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A short-section welder with variable cross-section double-needle riveting enhanced friction stir welding

A friction stir, variable cross-section technology, used in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve problems such as joint embrittlement, hook defects, welding tool tip wear, etc., to increase stability, promote atomic diffusion, enhance The effect of mechanical properties

Active Publication Date: 2020-01-03
苏州万智新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a short-section welding tool for double-needle riveting with variable cross-section and enhanced friction stir welding, which can solve the problems of hook defects, wear of the tip of the welding tool, and intermetallic gaps at the continuous welding interface The compound layer embrittles the joint, etc.

Method used

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  • A short-section welder with variable cross-section double-needle riveting enhanced friction stir welding
  • A short-section welder with variable cross-section double-needle riveting enhanced friction stir welding
  • A short-section welder with variable cross-section double-needle riveting enhanced friction stir welding

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specific Embodiment approach 1

[0029] Combine below Figure 1-5 Describe this embodiment, a variable cross-section double-needle riveting strengthened friction stir short-section welding tool, including a clamping body and a stirring pin, the stirring pin is fixedly connected to the lower end of the clamping body, and the stirring pin includes a connecting key 4 , a large stirring needle 5, a narrow concave shoulder 6 and a small stirring needle 7, the connecting key 4 is a single-sided key or a double-sided key, the lower end of the large stirring needle 5 is provided with a narrow concave shoulder 6, and the connecting The key 4, the large stirring needle 5, the narrow concave shoulder 6 and the small stirring needle 7 are fixedly connected sequentially from top to bottom, and the large stirring needle 5 and the small stirring needle 7 are all conical structures with threads arranged in the circumferential direction; At the beginning of welding, when the welding tool is rotated and pressed down, the small...

specific Embodiment approach 2

[0031] Combine below Figure 1-5 Describe this embodiment, this embodiment will further explain Embodiment 1, the clamping body includes a clamping part 1, a heat dissipation part 2 and a wide concave shoulder 3, the clamping part 1, a heat dissipation part 2 and a wide concave shoulder Shaft shoulder 3 is fixedly connected sequentially from top to bottom, the clamping part 1 is provided with a clamping surface 1-1, the diameter of the clamping part 1 is smaller than the diameter of the heat dissipation part 2, and the heat dissipation part 2 is provided with The heat dissipation groove 2-1, the heat dissipation groove 2-1 is a spiral groove with 3 to 5 turns, the connecting key 4 is matched and connected in the keyway provided at the lower end of the wide concave shoulder 3, and the wide concave shoulder 3 A fastening threaded hole 8 is provided on the top, and the fastening threaded hole 8 communicates with the keyway at the lower end of the wide concave shoulder 3. The fast...

specific Embodiment approach 3

[0033] Combine below Figure 1-5 Illustrate this embodiment, this embodiment will further illustrate embodiment two, the material of the clamping body is one or more of high-speed steel, tool steel, tungsten-cobalt alloy steel and nickel-based alloy steel, the stirring The needle is selected from the same material as the steel to be welded.

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Abstract

The invention relates to a welding tool, in particular to a variable section double-needle-riveting strengthened friction-stirring short section welding tool. The variable section double-needle-riveting strengthened friction-stirring short section welding tool comprises a clamping body and a stirring needle. The stirring needle is fixedly connected to the lower end of the clamping body and comprises a connecting key, a large stirring needle body, a narrow U-shaped shaft shoulder and a small stirring needle body; the connecting key is a single-face key or a double-face key; the narrow U-shapedshaft shoulder is arranged at the lower end of the large stirring needle body; the connecting key, the large stirring needle body, the narrow U-shaped shaft shoulder and the small stirring needle bodyare fixedly connected sequentially from top to bottom; and the large stirring needle body and the small stirring needle body are each of a conical structure provided with a thread circumferentially.According to the variable section double-needle-riveting strengthened friction-stirring short section welding tool, the problems that in the overlap welding process of aluminum steel dissimilar metal,the hook defect is likely to occur, the sharp end of the welding tool is prone to being abraded, and an intermetallic compound layer at a continuous welding interface enables a joint to be embrittledare solved.

Description

technical field [0001] The invention relates to a welding tool, in particular to a variable cross-section double-needle riveting enhanced stir friction short-section welding tool. Background technique [0002] Structural parts of dissimilar materials such as aluminum / steel have important applications in the fields of aviation, shipbuilding, petrochemical, atomic energy, and vehicle manufacturing. performance requirements. In the field of automobile manufacturing, the use of aluminum-steel composite structures can improve the dynamic performance of the body, increase fuel economy, and reduce environmental pollution. , The upper hull is generally made of anti-rust aluminum alloy to reduce the weight of the hull and achieve lightweight. The joint between the deck and the hull involves welding of dissimilar materials of aluminum and steel. However, the thermal physical properties of dissimilar materials such as aluminum / steel are too different. During fusion welding, the joint...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/1255
Inventor 黄体方万龙马国栋吴泓阳吕宗亮刘鑫
Owner 苏州万智新能源科技有限公司
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