Magnetic auxiliary welding device and method

An auxiliary welding and connecting rib technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of weakening the softening effect of the melting area, indentation of parts, and affecting the appearance quality of parts, etc., to increase the microhardness , Improve the effect of nugget shape
CN112077434AActive Publication Date: 2020-12-15CRRC QINGDAO SIFANG CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CRRC QINGDAO SIFANG CO LTD
Publication Date
2020-12-15

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Abstract

Embodiments of the invention provide a magnetic auxiliary welding device and method. The welding device comprises a first electrode, a second electrode, a substrate, a first to-be-welded workpiece, asecond to-be-welded workpiece and magnetic units, wherein the first to-be-welded workpiece and the second to-be-welded workpiece are arranged between the first electrode and the substrate in an overlapped mode; the second electrode and the second to-be-welded workpiece abut against the substrate; the magnetic units are annularly arranged on the outer side of the first electrode; the first electrode abuts against the surface of the first to-be-welded workpiece, and nuggets are formed between the first to-be-welded workpiece and the second to-be-welded workpiece; and the magnetic units are usedfor stirring the nuggets. According to the embodiments of the invention, the magnetic units are arranged around the electrodes, the stirring magnetic field for stirring the nuggets is generated in theto-be-welded workpieces, and the three-dimensional coincidence real-time regulation and control is carried out on the welding area under the interaction of the stirring magnetic field and the weldingcurrent, so that the microhardness of the internal structures of the nuggets is increased in mechanism, the nugget form is improved, and the softening effect of a melting area in the axial directionis weakened to reduce indentations.
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Description

technical field

[0001] The invention relates to the field of welding technology, in particular to a magnetic-assisted welding device and a welding method. Background technique

[0002] Welding is an important process in the manufacture of rail vehicles, and resistance spot welding plays an important role in rail vehicle welding. The resistance spot welding process is the core joining process of thin-walled structures such as car bodies due to its advantages of high efficiency, low cost, and easy automation. However, resistance spot welding joints are prone to joint softening and local overheating, resulting in deep indentation and obvious burn marks, which seriously affect the surface quality of solder joints. For parts with high appearance requirements (such as unpainted stainless steel subway side walls, etc.), the common treatment method is to use single-sided resistance spot welding technology, supplemented by manual mechanical or chemical trace removal treatment after ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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