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A kind of spot welding welding method and spot welding joint

A spot welding and welding head technology, applied in the field of high-strength steel plate welding, can solve the problems that spot welded joints are difficult to achieve strength grade, and spot welded joints are prone to breakage, etc., so as to improve cross tensile strength, reduce stress concentration, Ease of testing

Active Publication Date: 2022-04-15
GEELY AUTOMOBILE INST NINGBO CO LTD +1
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Problems solved by technology

[0003] At present, when resistance spot welding is performed on high-strength steel plates, the strength of the spot-welded joint is difficult to reach the strength level corresponding to the base metal, and, in the cross tensile strength test, as the strength of the base metal increases, the nugget of the spot-welded joint more prone to breakage

Method used

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  • A kind of spot welding welding method and spot welding joint
  • A kind of spot welding welding method and spot welding joint
  • A kind of spot welding welding method and spot welding joint

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] see figure 1 , The invention provides a spot welding welding method. First, the plate group 3 is placed between the first electrode 4 and the second electrode 5, the plate group 3 includes at least two stacked steel plates, and at least one of the two adjacent steel plates is a high-strength steel plate. Then, the first electrode 4 and the second electrode 5 are respectively pushed to opposite sides of the plate set 3 until they respectively abut against the opposite two sides of the plate set 3 . Next, an external force is applied to the first electrode 4 and / or the second electrode 5, so that the first electrode 4 and the second electrode 5 move closer to each o...

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Abstract

The invention provides a spot welding welding method. The plate group is placed between the first electrode and the second electrode. During spot welding, the first electrode and the second electrode clamp the plate group and exert pressure on the plate group. At the same time, the first electrode and the second electrode are energized according to the preset current value, and the first energization process, the energization stop process and the second energization process are sequentially performed. After the spot welding is completed, the first electrode and the second electrode The electrodes can be released to remove the spot-welded plate pack. The present invention also provides a spot welding joint prepared by the above spot welding method.

Description

technical field [0001] The invention relates to the technical field of welding of high-strength steel plates used in automobiles, in particular to a spot welding method and a spot welding joint. Background technique [0002] With the goal of reducing the weight of automobiles, high-strength steel plates with a strength of more than 340MPa are widely used. On the other hand, in order to ensure the safety of occupants in the event of a collision, the application of high-strength steel plates has also been expanded to key parts of automobiles, especially ultra-high-strength steels above 1 GPa have become a current research hotspot. [0003] At present, when resistance spot welding is performed on high-strength steel plates, the strength of the spot-welded joint is difficult to reach the strength level corresponding to the base metal, and, in the cross tensile strength test, as the strength of the base metal increases, the nugget of the spot-welded joint The region is more pron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/11B23K11/36
CPCB23K11/115B23K11/36
Inventor 渡辺吾朗罗时清丁华冯波张杰黄露
Owner GEELY AUTOMOBILE INST NINGBO CO LTD
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