Oil-coated passivation film galvanized steel sheet welding process

A galvanized steel sheet, welding process technology, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problem of unfavorable oil-coated passivation film galvanized steel sheet welding, oil-coated passivation film galvanized steel sheet welding difficulty, welding effect It can achieve the effect of good welding effect, low cost, high efficiency and high degree of automation

Inactive Publication Date: 2020-11-03
PANGANG GROUP RESEARCH INSTITUTE CO LTD
4 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The welding between oil-coated galvanized steel sheets is usually manual arc full welding. Since there is a layer of oil-coated passivation film on the surface of oil-coated galvanized steel sheets, the surface of oil-coated galvanized steel sheets The zinc layer has a very low...
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Method used

By adopting resistance electric welding process of the present invention, each spot welding joint nugget diameter is between 3.1-4.5mm, and its spot welding joint nugget meets standard requirements, and the shear performance of spot welding joint is detected, every The shear resistance force of each spot welding joint is greater than 2.0kN, the shear resistance performance is good, the welding effect is good, and the welding effect has been significantly improved. Moreover, the resistance welding process has a simple principle, low technical re...
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Abstract

The invention relates to the technical field of galvanized steel sheet welding, in particular to an oil-coated passivation film galvanized steel sheet welding process. Oil-coated passivation film galvanized steel sheets are welded through a resistance spot welding mode; and equipment and parameters thereof during resistance spot welding are that a welding machine is a single-phase rectification type direct-current spot welding machine, an electrode is made of a Cr-Zr-Cu alloy, the diameter range of the end face of an electrode is 5-7 mm, the welding current range is 9.7-11.0 kA, the time rangeof each time of spot welding is 1-1.8 s, and the electrode pressure range is 2.5-3.5 kN. By the adoption of the resistance electric welding process, the nugget diameter of each spot-welded joint ranges from 3.1-4.5 mm, a nugget of each spot-welded joint meets the standard requirement, the shear resistance of each spot-welded joint is detected, the shear resistance of each spot-welded joint is larger than 2.0 kN, the shear resistance is better, the welding effect is remarkably improved, and welding of the large-scale oil-coated passivation film galvanized steel sheets is facilitated.

Application Domain

Welding/cutting media/materialsSoldering media +1

Technology Topic

Welding jointAlloy electrode +11

Examples

  • Experimental program(8)

Example Embodiment

[0015] Example 1
[0016] When welding between galvanized steel plates with oil-coated passivation film, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: The welding machine is a single-phase rectifier DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, electrode end diameter is 6mm, welding current is 9.9kA, spot welding time is 1.2s, electrode pressure is 2.5kN.
[0017] After the welding is completed, the nugget diameter of the spot welded joint is 3.36mm, and the shear resistance of the spot welded joint is tested. The shear resistance of the spot welded joint is 2.086kN.

Example Embodiment

[0018] Example 2
[0019] When welding between galvanized steel plates with oil-coated passivation film, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: The welding machine is a single-phase rectifier DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, the electrode end face diameter is 5mm, the welding current is 9.7kA, the spot welding time is 1s, and the electrode pressure is 2.5kN.
[0020] After the welding is completed, the nugget diameter of the spot welded joint is 3.12mm, and the shear resistance of the spot welded joint is tested. The shear resistance of the spot welded joint is 2.085kN.

Example Embodiment

[0021] Example 3
[0022] When welding between galvanized steel plates with oil-coated passivation film, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: The welding machine is a single-phase rectifier DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, the electrode end surface diameter is 6mm, the welding current is 10.2kA, the spot welding time is 1.2s, and the electrode pressure is 2.5kN.
[0023] After the welding is completed, the nugget diameter of the spot welded joint is 3.94mm, and the shear resistance of the spot welded joint is tested. The shear resistance of the spot welded joint is 2.291kN.

PUM

PropertyMeasurementUnit
Thickness6.0mm
Surface diameter6.0mm
Diameter3.36mm

Description & Claims & Application Information

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