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Friction stir butt welding device for high-resistivity alloy and processing method

A friction stir welding and friction stir technology, which is applied in metal processing equipment, non-electric welding equipment, welding equipment, etc., can solve problems such as hindering the large-scale popularization and application of current-assisted friction stir welding, insignificant Joule effect, and low resistivity. Achieve the effect of reducing welding defects, improving weld quality and reducing temperature gradient

Pending Publication Date: 2020-07-17
TONGLING UNIV
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Problems solved by technology

[0005] Current-assisted friction stir welding speeds up the softening of materials by generating Joule heat and changing the electroplasticity of materials by applying an external current. However, the welding objects of friction stir welding are mostly metals with low resistivity. High-intensity electric current is required to produce the effect
High-intensity current will also bring about high energy consumption, which also hinders the large-scale application of current-assisted friction stir welding.

Method used

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  • Friction stir butt welding device for high-resistivity alloy and processing method

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Embodiment 1

[0029] Such as figure 1As shown, a friction stir butt welding device for high-resistivity alloys includes a workbench, a friction stir welding mechanism and a rolling electrode assembly. The workbench is used to place and fix workpieces to be welded, and the workpieces to be welded include No. 1 workpiece 2 and No. 2 workpiece 3, the No. 1 workpiece 2 and No. 2 workpiece 3 are laid side by side on the surface of the worktable, and the mutual contact positions form a docking interface 23; Heat shield 1, by setting the heat shield 1, the temperature gradient in the thickness direction of the workpiece to be welded can be reduced, so that the bottom of the workpiece to be welded also has a sufficient softening effect, thereby enhancing the flow and flow of the material in the bottom area of ​​the workpiece during welding Quantity, so that the bottom material is fully mixed, reducing welding defects at the bottom of the workpiece, and improving welding quality.

[0030] The conta...

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Abstract

The invention relates to a friction stir butt welding device for a high-resistivity alloy and a processing method. The friction stir butt welding device comprises a worktable and a friction stir welding mechanism, the worktable is used for placing and fixing to-be-welded workpieces, the to-be-welded workpieces comprise a first workpiece and a second workpiece which are flatly laid on the surface of the worktable in parallel, a butted interface is formed at the mutual-contact position, the friction stir welding mechanism comprises friction stir welding equipment arranged above the worktable, astirring head of the friction stir welding equipment is located over the butted interface of the to-be-welded workpieces, the bottom of the butted interface is further provided with a copper plate electrode, and the device further comprises a rolling electrode assembly. By arranging a copper core electrode, the copper plate electrode and a second power supply, a large direct current is applied tothe butted interface of the workpieces, the workpieces are softened by joule heat generated by the large direct current, meanwhile plasticity and liquidity of the workpieces are improved, and the purposes of prolonging the life of the stirring head and increasing the welding speed are achieved.

Description

technical field [0001] The invention belongs to the technical field of friction stir welding, and in particular relates to a friction stir butt welding device for high-resistivity alloys and a processing method thereof. Background technique [0002] Composite friction stir welding uses an auxiliary heat source to provide additional heat input for friction stir welding, thereby improving the application range and adaptability of friction stir welding. In recent years, researchers have successively developed laser, current, arc, induction, ultrasonic and other energy-assisted friction stir welding. Among them, current-assisted friction stir welding is an external heat-assisted friction stir welding technology invented by using high-intensity current to cause material softening. It is a current output device added to the traditional process of friction stir welding. High-intensity current passes through the stirring needle and the weldment at its lower end. The Joule heat gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/26
CPCB23K20/122B23K20/123B23K20/26
Inventor 王东生徐礼锋杨浩朱元洋肖睿张一驰
Owner TONGLING UNIV
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