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Stirring needle spiral groove gradually deepening type stirring head

A technology of spiral groove and stirring needle, which is applied in the field of friction stir welding, can solve the problems of insufficient heat production at the tip of the stirring needle and poor weld seam, and achieve the effects of simple and reliable structure, increased surface area, and improved welding quality

Pending Publication Date: 2020-01-17
HUNAN JOINFRONT WELDING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When faced with poor heat dissipation conditions or workpieces that require penetration, it is easy to cause insufficient heat production at the tip of the stirring needle, resulting in poor welds

Method used

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  • Stirring needle spiral groove gradually deepening type stirring head
  • Stirring needle spiral groove gradually deepening type stirring head
  • Stirring needle spiral groove gradually deepening type stirring head

Examples

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 to Figure 3 It shows an embodiment of the stirring needle spiral groove deepening type stirring head of the present invention, which includes a clamping part 1, a shaft shoulder part 2 and a stirring needle 3 connected in sequence, and a spiral groove 31 is opened on the peripheral side of the stirring needle 3, The groove depth between adjacent helical grooves 31 increases from the needle root portion 32 to the needle tip portion 33 . 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 increases the groove depth between the adjacent spiral grooves 31 in the direction from the needle base 32 to the needle tip 33. Compared with the singl...

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PUM

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Abstract

The invention discloses a stirring needle spiral groove gradually deepening type stirring needle. The stirring needle spiral groove gradually deepening type stirring needle includes a clamping part, ashaft shoulder part and a stirring needle connected in sequence. Spiral grooves are formed on the peripheral side of the stirring needle. The groove depth between adjacent spiral grooves increases from the root of the needle to the tip of the needle. The stirring head has the advantage that the structure is simple and reliable, and the welding speed and the welding quality can be improved.

Description

technical field [0001] The invention mainly relates to the friction stir welding technology, in particular to a stirring head with a gradually deepening spiral groove of a stirring pin. 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 techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
CPCB23K20/12B23K20/1255
Inventor 李贤清李志明周长兴钟南汤雨竹
Owner HUNAN JOINFRONT WELDING TECH
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