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Welding electrode and method

A welding electrode and electrode technology, applied in welding equipment, electrode characteristics, welding medium and other directions, can solve the problem of reducing the life of the tip

Inactive Publication Date: 2007-08-15
HUYS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Third, since the electrodes in question are frequently used for spot welding galvanized steel sheets in automotive production, at welding temperatures, zinc from the galvanized steel sheets tends to migrate into the copper of the welding electrodes , this tendency is strongest in the contact area of ​​the electrodes, which tends to cause, undesirably, the formation of brass alloys on the electrode tips and tends to reduce tip life

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Embodiment Construction

[0032]The following description, and the embodiments described therein, are given by way of illustration of one or several specific embodiments of the principles of the present invention. These examples are provided to explain the principles of the invention, not to limit them. In this description, like parts are marked with the same reference numerals throughout the specification and drawings. The drawings are not necessarily to scale, and in some instances, scales may be exaggerated in order to more clearly describe certain features of the invention.

[0033] In this specification, the welding electrode may be either convex or concave, as described below. In either case (convex or concave), the welding electrode may have the general form of a body of revolution formed about the central axis. Considered from a polar cylindrical co-ordinate system, the rotating body has a long axis (or axial) which may be called the z-axis, and has a radial direction extending away from the ...

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Abstract

A welding electrode has a body having a shank and a contact region for placement against a workpiece during welding. A portion of the body may be formed on a parabolic profile. A coating is formed on the contact region. The coating may have a first layer, and a second layer formed over the first layer. The first and second layers may have different compositions. The electrode may have internally formed cooling finwork for interaction with a liquid cooling system.

Description

technical field [0001] The invention relates to the field of welding electrodes. Background technique [0002] Welding electrodes can be used in resistance welding. Resistance welding technology is widely used in industry, and an example of such an application is spot welding of car bodies. In that particular application, a welding gun equipped with a pair of cooperating working electrodes can be stepped over the welding path. Each step, the pair of electrodes approach the opposite sides of the workpiece to be welded, and a current passes between the two electrodes. The electrical resistance at the interface between the workpieces tends to cause localized heating to occur, causing the workpieces to melt locally to form a weld nugget. The electrode will now be removed from the workpiece. On a production line basis, these steps are performed in high-speed sequence and repeated for each successive welding position. [0003] In high-volume production, especially where robot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/04B23K35/30B23K11/30C23C30/00
CPCB23K35/36H05H2001/3478B23K35/0261C23C28/322H05H1/34B23K35/0272C23C28/34H05H2001/3436B23K35/325C23C28/321B23K11/3018C23C30/00C23C28/341C23C28/325H05H1/3436H05H1/3478
Inventor 奈杰尔·斯科奇默
Owner HUYS IND