Resistive spot welding process

A technology of resistance spot welding and process, applied in the direction of resistance welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of low production efficiency, unsightly appearance, high cost, etc., and achieve fast heat generation, high connection strength, and heat-affected zone small effect

Inactive Publication Date: 2005-09-28
武佩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the traditional spot welding process cannot weld insulating materials and steel or stainless steel, the following connection methods are often used: (1), riveting or bolt connection, in this method, there are rivet heads or bolt heads on both sides of the workpiece, and the surface of the workpiece Uneven, unattractive, affecting use; and many processes, low production efficiency
(2) Gluing method, the joint of this method can only be used at low temperature, and the strength is poor, the cleaning requirements on the surface of the workpiece are high, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: A resistance spot welding process, the process conditions are as follows: add connecting parts between the welded parts. The material of the weldment is steel, and the shape of the connecting piece is a thin ring. The diameter of the outer ring of the thin ring connecting piece is 0.7 times the diameter of the electrode, the diameter of the inner ring is 0.2 times the diameter of the electrode, and the thickness is 0.5 times the minimum thickness of the workpiece. times. When welding, the steel or stainless steel sheet ring is placed between two layers of weldment, and spot welded with the electrode.

Embodiment 2

[0013] Embodiment 2: A resistance spot welding process, the process conditions are as follows: add connecting parts between the welded parts. The material of the weldment is stainless steel, and the shape of the connector is a thin circular ring. The diameter of the outer ring of the thin circular ring connector is 0.9 times the diameter of the electrode, the diameter of the inner ring is 0.4 times the diameter of the electrode, and the thickness is 1 times the minimum thickness of the workpiece. times. When welding, the stainless steel or steel sheet ring is placed between two layers of weldment, and spot welded with the center of the electrode.

Embodiment 3

[0014] Embodiment 3: A resistance spot welding process, the process conditions of which are as follows: add connecting parts between the welded parts. The material of the weldment is stainless steel, and the shape of the connecting piece is a thin ring. The diameter of the outer ring of the thin ring connecting piece is 0.8 times the diameter of the electrode, the diameter of the inner ring is 0.3 times the diameter of the electrode, and the thickness is 0.8 times the minimum thickness of the workpiece. times. When welding, the stainless steel or steel sheet ring is placed between two layers of weldment, and spot welded with the center of the electrode.

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PUM

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Abstract

The resistive spot welding process has connecting parts added between the welded parts of steel, including stainless steel. The present invention has the advantages of the contact between the connecting part and the welded parts resulting in concentrated welding current, fast heating, small electrode force and less pressure impression; the combination of the fast molten connecting part with the welded parts resulting in less heat area influence, high strength and large welding kernel; capacity of welding high electric conductivity and high heat conductivity material as well as non-metal material to steel including stainless steel; and higher connecting strength and higher surface quality compared with riveting and adhering.

Description

Technical field: [0001] The invention relates to a welding process, in particular to a resistance spot welding process with a connecting piece. Background technique: [0002] Resistance spot welding relies on the resistance heat of the workpiece itself (mainly the heat generated by the contact resistance between the workpieces) to realize the welding of thin metal plates made of steel, stainless steel and aluminum, and is widely used in manufacturing industries such as automobiles and aviation. Traditional resistance spot welding does not need to add any additional materials. In order to make better contact between the workpieces, a greater pressure is applied between the electrodes, so there are indentations on the workpiece after welding, which affects the appearance of the workpiece; there is a heat-affected zone, The metal in the heat-affected zone is easy to be brittle; and the size of the weld nugget is related to the thickness of the workpiece. When the workpiece is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11
Inventor 武佩韩宝生
Owner 武佩
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