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Friction stir welding device and welding method

A friction stir welding and welding method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of difficult long-term welding of stirring heads and low life of stirring heads, and reduce local residual stress and micro-cracks. Tendency, avoid local quenching, and have the effect of high heat transfer efficiency

Pending Publication Date: 2020-10-13
YANTAI CONGLIN PRECISION MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a friction stir welding device and welding method to solve the problem that the stirring head of the existing friction stir welding device is difficult to achieve long-term welding and the life of the stirring head is low

Method used

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  • Friction stir welding device and welding method
  • Friction stir welding device and welding method
  • Friction stir welding device and welding method

Examples

Experimental program
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Effect test

Embodiment approach 1

[0060] pass Figure 1 to Figure 2 The shown friction stir welding device welds TA15 titanium alloy with a thickness of 1.5mm. The diameter of the stirring part 1 can be set to Φ10mm. At this time, the inert gas can be argon, the flow rate of argon is 5L / min, and the temperature of argon is 3 °, the cone angle of the first accommodation space 12 of the stirring part 1 is 4 °, the volume of the cooling medium 13 accounts for 26% of the volume ratio of the first accommodation space 12, and the cooling medium 13 is selected from sodium-potassium alloy, the quality of sodium and potassium The scale is 1.5. pass Figure 1 to Figure 2 The friction stir welding device shown can realize the welding length of TA15 titanium alloy is 11 meters, the static mechanical properties of the TA15 friction stir joint can reach 90% of the base metal, and the surface of the weld seam presents a silver-white metallic luster.

Embodiment approach 2

[0062] pass Figure 1 to Figure 2 The shown friction stir welding device welds a TC4 titanium alloy with a thickness of 6mm. The diameter of the stirring part 1 can be set to Φ15mm. At this time, the inert gas can be argon, the flow rate of argon is 20L / min, and the temperature of argon is -5 °, the cone angle of the first accommodation space 12 of the stirring part 1 is 4 °, the volume of the cooling medium 13 accounts for 30% of the volume ratio of the first accommodation space 12, and the cooling medium 13 is selected from sodium-potassium alloy, the quality of sodium and potassium The scale is 3. pass Figure 1 to Figure 2 Shown friction stir welding device can realize that the welding length of TC4 titanium alloy is 8 meters, and the life-span of the TC4 titanium alloy that the stirring head welding thickness of existing welding device is 6mm is 5 meters, the stirring part 1 of the embodiment of the present invention Lifespan increased by 60%.

[0063] see image 3 , ...

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Abstract

The embodiment of the invention provides a friction stir welding device and a welding method. The friction stir welding device comprises a stirring part and a clamping part, wherein one end of the stirring part is provided with a shaft shoulder, and the interior of the stirring part is provided with a closed first containing space for containing a cooling medium; and the clamping part is providedwith a second containing space, one part of the stirring part is located in the second containing space, the other part of the stirring part is located outside the second containing space, the clamping part is provided with a cooling channel, the cooling channel communicates with the second containing space and surrounds the stirring part, an outlet of the cooling channel is formed close to one end of the stirring part, an inlet of the cooling channel is formed close to the other end of the stirring part, inert gas guided in through the inlet of the cooling channel cools the exterior of the stirring part, and inert gas is guided to the to-be-welded area through the outlet of the cooling channel to conduct gas protection on the to-be-welded area, in this way, the interior and the exterior of the stirring part can be effectively cooled, and the service life of the stirring part can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to a friction stir welding device and a welding method. Background technique [0002] Friction stir welding is a solid phase joining technology, which has been widely used in the welding of aluminum alloys and copper alloys because it can overcome the common defects of traditional fusion welding. The performance of the friction stir welded joint of titanium alloy is excellent, which can reach more than 90% of the performance of the base metal, so it has gradually become a research hotspot. However, in the friction stir welding process of titanium alloy, since titanium alloy is a material with a high melting point, the temperature in the welding area is very high, and the stirring head used for friction stir welding in the existing friction stir welding device is difficult to achieve long-term welding, and Stirring head life is low. Contents of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
CPCB23K20/1245B23K20/1275
Inventor 张培栋马桂元
Owner YANTAI CONGLIN PRECISION MACHINERY