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V-shaped gradient joint welding method

An interface and gradient technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of high welding cost and weak joint performance, and achieve the effect of good weld forming quality, high welding efficiency and low cost

Active Publication Date: 2019-12-20
东北大学秦皇岛分校
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Problems solved by technology

[0005] Aiming at the shortcomings of weak joint performance and high welding cost in the current method of suppressing friction stir lap welding defects, the present invention proposes a method based on V-shaped gradient interface welding

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Embodiment Construction

[0017] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0018] figure 1 The middle is the schematic diagram of the welding process;

[0019] Before welding, it is necessary to prepare the upper lapping plate 1 and the lower lapping plate 2; the upper lapping plate 1 is the welding material, and the lower lapping plate 2 is the product to be welded, and the upper lapping plate 1 and the lower lapping plate 2 can be The same material with the same melting point may also be different materials with different melting points.

[0020] After the lower lapping plate 2 is ready, a groove 3 is opened in the area to be welded of the lower lapping plate, and the groove 3 is opened along the track of the area to be welded, wherein the track of the groove 3 is located within the track of the area to be welded; Preferably, the cross section of the shape of the groove 3 is a V-shaped structure, formi...

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Abstract

The invention provides a V-shaped gradient joint welding method, and relates to the technical field of friction stir welding. The V-shaped gradient joint welding method is mainly applied to lap jointwelding of various materials in friction stir welding. The specific method comprises the following steps that before welding, a V-groove is machined on a lower plate that needs to be welded, and a V-shaped gap occurs between an upper splice plate and a lower splice plate. During welding, the upper plate material fills the V-shaped gap under the action of a welding tool, so that the local originalsurface contact lap joint between the upper plate and the lower plate is converted into an inclined joint with a gradient, the welding tool is adopted to fully stir friction and weld the joint, the common joint migration phenomenon in the traditional friction stir welding process can be effectively inhibited, and the high-quality friction stir welding head can be obtained.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to a method for suppressing welding defects during friction stir lap welding. Background technique [0002] Since it was invented in 1991, friction stir welding has been widely used in aerospace, rail transit, automobile and ship due to its advantages of small stress and deformation after welding, good mechanical properties of joints, wide application range, high efficiency, low cost and no pollution to the environment. , Power electronics and other industries have been widely used. [0003] In the welding process of structural parts, the lap joint structure is a common joint form. With the expansion of the application range of friction stir welding, the welding of lap joint structures has become a common form of friction stir welding. However, in the process of friction stir welding, the plasticized metal not only flows in the horizontal direction driven by the rotat...

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/122
Inventor 张会杰孙舒蕾汪应玲刘旭张豪纪子杰
Owner 东北大学秦皇岛分校
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