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Multi-layer forged and pressed stirring head for friction stir welding

A friction stir welding and stirring head technology, which is used in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of uneven depth direction of weld structure and increased flash, and achieve uniform depth direction and reduce forging. The effect of pressure, up and down flow is sufficient

Pending Publication Date: 2020-01-14
HUNAN JOINFRONT WELDING TECH
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Problems solved by technology

[0005] The forging pressure of the existing ordinary stirring head on the weld metal mainly comes from the shaft shoulder. When performing friction stir welding on thick plates, the forging pressure from the surface of the weld to the root of the weld decreases successively. In order to form a good weld structure, it is necessary to pass The method of increasing the amount of down pressure increases the top force, which in turn causes the flash to increase, and the weld structure is uneven in the depth direction

Method used

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  • Multi-layer forged and pressed stirring head for friction stir welding
  • Multi-layer forged and pressed stirring head for friction stir welding
  • Multi-layer forged and pressed stirring head for friction stir welding

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 to Figure 4 It shows an embodiment of the multi-layer forging type stirring head used for friction stir welding of the present invention, including the clamping part 1, the shaft shoulder part 2 and the stirring pin 3 connected in sequence, and the peripheral side of the stirring pin 3 is provided with a spiral The top surface of the groove 31 and the spiral groove 31 forms a forging surface 32 . During welding, the clamping part 1 is used for clamping, the stirring pin 3 generates heat energy through rotational friction, and the shoulder part 2 is used to form forging. Compared with the traditional structure, the stirring head forms a multi-layer spiral groove 31 on the peripheral side of the stirring needle 3, and the top surface of the spiral groove 31 forms a forging surface 32, which is brought by the multi-laye...

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Abstract

The invention discloses a multi-layer forged and pressed stirring head for friction stir welding. The stirring head comprises a clamping part, a shaft shoulder part and a stirring needle, wherein theclamping part, the shaft shoulder part and the stirring needle are sequentially connected, a spiral groove is formed in the circumferential side of the stirring needle, and the top surface of the spiral groove forms a forged and pressed surface. The stirring head has the advantages that the structure is simple and reliable, the uniformity of welding seam tissues is improved, and the pressing amount and the thickness of a welding flange can be reduced.

Description

technical field [0001] The invention mainly relates to friction stir welding technology, in particular to a multi-layer forging type stirring head for friction stir welding. Background technique [0002] In the friction stir welding process, the interaction between the stirring head and the workpiece material generates heat, and the workpiece material around the stirring head is heated to a plasticized state to form a weld. The heat mainly includes the friction between the shaft shoulder and the stirring needle and the base material Heat generation and plastic deformation heat generated by stirring and extruding workpiece materials. During the friction stir welding process, the temperature field of the workpiece is unevenly distributed, showing the law that the temperature at the shaft shoulder of the stirring head is the highest and gradually decreases toward the end surface of the stirring pin. [0003] Stirring head is the core of friction stir welding technology. It in...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/12B23K20/1255
Inventor 李志明周长兴李贤清钟南汤雨竹
Owner HUNAN JOINFRONT WELDING TECH
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