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Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate

A technology of resistance spot welding and galvanized steel sheet, applied in resistance welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of undiscovered galvanized sheet steel, reduce temperature, improve corrosion resistance, and prolong service life Effect

Inactive Publication Date: 2012-09-19
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no reports on process gasket materials suitable for galvanized steel sheets have been found so far

Method used

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  • Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate
  • Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate
  • Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate

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Embodiment Construction

[0023] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0024] Such as figure 1 As shown, a method for prolonging the service life of electrodes for resistance spot welding of galvanized steel sheets is to insert an upper layer of copper between the upper electrode 1 and the upper galvanized steel sheet 3 to be welded when the galvanized sheet steel resistance spot welding is connected. A nickel alloy process gasket 2 is inserted between the lower electrode 6 and the lower layer of galvanized 4 to be welded, and the lower copper-nickel alloy process gasket 5 is inserted.

[0025] The inventive method specifically comprises the steps:

[0026] Between the upper elect...

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Abstract

The invention relates to a method for prolonging the service life of a resistance spot welding electrode of a galvanized thin steel plate; when the galvanized thin steel plate is connected by resistance spot welding, an upper layer Cu-Ni alloy process gasket is inserted between a top electrode and an upper layer galvanized steel plate to be welded, and a lower layer Cu-Ni alloy process gasket is inserted between a lower electrode and a lower layer galvanized steel plate to be welded; each Cu-Ni alloy process gasket comprises the following components by mass percent: 40-45% of Ni, 1-1.5% of Mn and the balance of Cu, and respectively has the resistivity within the range of 0.45-0.51 and the thickness within the range of 0.05-0.2mm. The method can effectively reduce the temperature of the end surface of the electrode, and reduces the abrasion of the electrode, thus prolonging the service life of the electrode; the Cu-Ni alloy process gaskets hardly have alloying reaction with electrode material, so that the abrasion is further reduced; the formation and growth of spot welding nugget can be promoted by the self resistance heat of the Cu-Ni alloy process gaskets, so that the quality of a spot-welded joint can be improved, and the current needed by welding is reduced, and the energy consumption is lowered.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for reducing the temperature of an electrode end surface of a resistance spot welding electrode of a galvanized thin steel plate and improving the service life of the electrode. Background technique [0002] In order to meet the needs of automobile lightweight, safety and fuel economy, a large number of galvanized high-strength thin steel sheets are used in body manufacturing. Resistance spot welding is an important thin-plate joining technology and the main welding assembly method in car body manufacturing. Compared with uncoated steel sheets, spot welding galvanized steel sheets requires stronger welding specifications, and the galvanized layer is easy to alloy with the electrode, which causes serious electrode wear. As the thickness of the steel plate becomes thinner (<0.6 mm), the heat in the welding area is more easily conducted to the electrode cap, resulting ...

Claims

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Application Information

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IPC IPC(8): B23K11/11B23K11/34
Inventor 张延松赵杨洋王培中陈关龙来新民
Owner SHANGHAI JIAO TONG UNIV
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