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A friction stir welding stirring head with a cutting edge

A friction stir welding and cutting edge technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of uneven mixing of materials, achieve the effects of enhancing mechanical properties, mixing fully and uniformly, and increasing fluidity

Active Publication Date: 2018-07-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to invent a friction stir welding stirring head with a cutting edge in order to solve the problem that the existing stirring head in friction stir welding is prone to defects such as uneven material mixing when connecting dissimilar materials or materials with poor fluidity

Method used

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  • A friction stir welding stirring head with a cutting edge
  • A friction stir welding stirring head with a cutting edge
  • A friction stir welding stirring head with a cutting edge

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as Figure 1-4 shown.

[0022] A friction stir welding stirring head with a cutting edge, which mainly consists of a clamping handle 1, a transition cylinder 2, a shaft shoulder 3, a stirring needle 4, a cutting blade 5, a spiral groove 6, a blade groove 7 and a cutting edge 8 Composition, such as Figure 1-3 As shown, the clamping handle 1, the transition cylinder 2, the shaft shoulder 3 and the stirring needle 4 are sequentially connected, and the transition cylinder 2 is processed with several ring-shaped grooves that can reduce weight and facilitate heat dissipation. Processing has several spiral grooves 6 ( image 3 4 in the middle), the cross-sectional shape of the spiral groove 6 is U-shaped, and there are several blade grooves 7 on the left edge of the spiral groove 6, and several cutting blades 5 are installed in each blade groov...

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Abstract

The invention discloses a friction stir welding stir-welding head provided with cutting edges. The friction stir welding stir-welding head mainly comprises a clamping handle (1), a transition cylinder (2), a shaft shoulder (3) and a stir needle (4) which are sequentially connected, and is characterized in that the surface of the stir needle (4) is provided with a plurality of spiral grooves (6) which are axially arranged; the left side of each spiral groove (6) is provided with a plurality of blade grooves (7); a plurality of cutting blades (5) are arranged in each blade groove (7); cutting edges (8) of the plurality of cutting blades (5) in each spiral groove (6) form a spiral cutting edge; and the end surface, which is connected with the stir needle (4), of the shaft shoulder (3) is inwards concave so that plastic materials are favorably stored and redistributed. By adopting the friction stir welding stir-welding head, the fluidity of the plastic materials in the horizontal direction and the vertical direction is enhanced, so that the materials are more fully and uniformly mixed; the mechanical property of a connection area is enhanced; and the welding quality and connection speed of the connection area are greatly improved.

Description

technical field [0001] The invention relates to a tool for friction stir welding, in particular to a stirring head, in particular to a stirring head with a cutting edge which can improve the quality of friction stir welding seam. Background technique [0002] Friction stir welding is a high-efficiency, energy-saving, and environmentally friendly solid-phase joining technology. During the joining process, the high-speed rotating stirring head advances along the joint of workpiece materials with a certain amount of pressure and forward speed. The workpiece material is subjected to friction and strong plastic deformation in the contact area of ​​the shaft shoulder of the stirring head and the stirring pin, which generates heat and softens. Under the stirring action of the stirring pin, the softened material is extruded and deformed to produce flow, which is highly plastic The deformed material is gradually deposited on the back of the stirrer, thus completing the solid phase co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/1255
Inventor 左敦稳左立生叶赵伟黎向锋罗伦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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