Friction stir butt welding device for large-thickness titanium-nickel dissimilar material and machining method of friction stir butt welding device

A technology of friction stir welding and friction stir, which is applied in the direction of metal processing equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problem of affecting the performance and application range of weldments, the upper and lower fillets are not effectively connected, and the structure of hybrid robots Complicated problems, to achieve the effect of improving welding efficiency, reducing axial pressure and increasing life

Pending Publication Date: 2020-07-17
TONGLING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent CN 103978304 A discloses a friction stir welding process for thick plates. By opening a symmetrical stepped groove on the thick plate, embedding strips of the same quality as the plate are embedded in the pit, and by layering the thick plate for many times with Fillet friction stir butt welding realizes butt welding between thick plates, but this method is not only complicated in process, but the main problem is that the upper and lower fillets are not effectively connected in the direction of plate thickness, which becomes the weak link of the entire weldment and affects the The performance and scope of use of weldments
However, the structure of the hybrid robot is complex and the price is high

Method used

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  • Friction stir butt welding device for large-thickness titanium-nickel dissimilar material and machining method of friction stir butt welding device
  • Friction stir butt welding device for large-thickness titanium-nickel dissimilar material and machining method of friction stir butt welding device
  • Friction stir butt welding device for large-thickness titanium-nickel dissimilar material and machining method of friction stir butt welding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 and 2 As shown, a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials includes a workbench, a friction stir welding mechanism and a laser heating mechanism. The surface of the workbench is provided with a heat shield 1, and the heat shield 1 The surface is used to place the alloy plate to be welded. By setting the heat shield 1, the temperature gradient in the thickness direction of the weld can be reduced, so that the bottom of the weld can also have sufficient softening effect, thereby increasing the material flow in the bottom area during the welding process And the flow rate, so that the dissimilar materials of titanium and nickel at the bottom can also be fully mixed, reducing various welding defects at the bottom, and improving the quality of the weld. The workbench also includes a fixed clamping device, which is convenient for fixing the heat shield 1 and the alloy plate to be welded on the surface of the work...

Embodiment 2

[0048] like image 3 and 4 As shown, a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials differs from Example 1 in that a hollow placement groove 31 is arranged inside the stirring head 3, and a hollow placement groove 31 is arranged inside the placement groove 31 There is a copper core electrode 34 that matches with it. The side surface of the copper core electrode 34 is wrapped with an insulating sleeve 33, and its bottom is in contact with the stirring pin 32 at the bottom of the stirring head 3. The input end of the copper core electrode 34 is connected to the set It is connected to one end of the pulse power supply outside the friction stir welding equipment; the surface of the heat shield 1 is provided with an insulating groove corresponding to the interface of the workpiece to be welded, and an elastic insulating heat insulating pad 11 matching with it is arranged in the insulating groove , the upper surface of the elastic insul...

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Abstract

The invention relates to a friction stir butt welding device for a large-thickness titanium-nickel dissimilar material and a machining method of the friction stir butt welding device. The friction stir butt welding device comprises a workbench and a friction stir welding mechanism, the workbench comprises a fixed clamping device, the friction stir welding mechanism comprises friction stir weldingequipment, the output end of the friction stir welding equipment comprises a stirring head, and a gas protection mechanism is arranged at the stirring head; the friction stir butt welding device further comprises a laser output mechanism, the laser output mechanism comprises a plurality of second laser output mechanisms arranged on the upper portion of the gas protection mechanism; and a hollow placement groove is formed in the stirring head. By arranging the laser output mechanism, the gas protection mechanism or a current heating mechanism in the stirring head of conventional friction stir butt welding equipment, the problem of insufficient softening of the bottom of a to-be-welded area only during surface laser heating is solved, and the axial pressure of the stirring head in the welding process can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of friction stir welding equipment, and in particular relates to a friction stir butt welding device and a processing method for large-thickness titanium-nickel dissimilar materials. Background technique [0002] Friction stir welding technology is a new type of solid phase joining technology developed by the British Welding Institute in 1991. The principle is that a stirring head with a special shaft shoulder is rotated at a certain speed and inserted into the part to be welded. Due to the heat generated by the friction between the stirring head and the weldment, the temperature of the material in the surrounding area of ​​the stirring head rises and reaches a thermoplastic state. , while rotating, the stirring head moves forward at a certain speed. At this time, the thermoplastic material will move along the direction of rotation of the stirring head under the action of the stirring head, and the material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/14B23K20/24B23K20/26B23K103/18
CPCB23K20/122B23K20/14B23K20/24B23K20/26B23K2103/18
Inventor 王东生徐礼锋刘玥季燕朱坤锋杨浩朱元洋肖睿张一驰
Owner TONGLING UNIV
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