Spot welding method and application thereof in aluminum alloy and steel

An aluminum alloy sheet, aluminum alloy technology, applied in welding equipment, resistance welding equipment, metal processing equipment and other directions, can solve the problems of large expansion coefficient, easy generation of pores and cracks, poor weldability of aluminum alloys, etc., to achieve improved fatigue performance, The effect of increased tensile strength and increased connection area

Inactive Publication Date: 2013-10-16
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The weldability of aluminum alloys, due to the large linear expansion coefficient of aluminum, is prone to pores and cracks during the condensation process after welding. During the process, pores and deformation are easy to occur, and pits are formed around the molten pool, which affects the welding quality. Therefore, the welding of aluminum alloys Poor sex

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  • Spot welding method and application thereof in aluminum alloy and steel
  • Spot welding method and application thereof in aluminum alloy and steel
  • Spot welding method and application thereof in aluminum alloy and steel

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Embodiment Construction

[0014] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0015] The first group, welding 7075 aluminum alloy sheet (thickness 1mm, length 100mm, width 30mm, lap joint length 30mm), according to the lap joint method, drill a hole at the center of the lap joint and then press the metal rod into it. The metal rod material is 5052 aluminum Alloy, diameter 3mm, length 3mm

[0016] The second group, welding Q235 steel (thickness 2mm, length 100mm, width 30mm, lap joint length 30mm), filled metal rod Q235 steel (diameter 3mm, length 6mm)

[0017] The third group, welding 5052 aluminum alloy (thickness 2mm, length 100mm, width 30mm, lap joint length 30mm), filler metal rod 5052 aluminum alloy (diameter 3mm, length 6mm)

[0018] The fourth group, welding DP600 super-strength steel (thickness 2mm, length 100mm, width 30mm, lap joint length 30mm), filler metal rod Q235 steel (diameter 3mm, length 6mm)

[0019] C...

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Abstract

The invention discloses a spot welding method. Aiming at aluminum alloy plates, aluminum alloy and various steel dissimilar materials, the method adds a solid adding material which is generally a rivet in a welded plate and then carries out spot welding at the riveting place. The tensile strength of a spot-welding lap joint which is welded with the method is higher than that of a spot-welding test piece which is welded under same parameters, meanwhile the welding quality of the spot-welding lap joint is good, and the spot-welding lap joint does not have obvious cracks or gas holes.

Description

technical field [0001] The invention relates to resistance spot welding welding technology, more specifically, relates to the technical field of aluminum alloy and steel plate spot welding welding technology. Background technique [0002] The resistance spot welding system adopts the principle of double-sided double-point overcurrent welding. When working, two electrodes pressurize the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes, and the welding current flows from one electrode to the other. Instant resistance heat is formed at the two contact resistance points to melt the materials to be welded to achieve the purpose of combining them. High efficiency, low energy consumption, high output, simple operation and other advantages are widely used in aerospace, electronics, automobiles, household appliances, etc. industry. The weldability of aluminum alloys, due to the large linear expansion coefficient of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11B23K11/34B23K11/16
Inventor 罗震罗玉璨冯悦峤段瑞
Owner TIANJIN UNIV
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