Welding electrode with structural surface

A technology of welding electrodes and electric sparks, which is applied in the direction of welding medium, electrode manufacturing, manufacturing tools, etc., can solve the problems of fast wear of guide parts, hindering the current transmission of welding rods and electrodes, rough shell, etc., and achieve the effect of high electric corrosion

Inactive Publication Date: 2006-01-18
BERKENHOFF GMBH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this electrode is that the surface is irregular and cracked by roughening, which prevents the electrode from guiding and delivering current to the electrode.
On the one hand, such a shell is very rough and hard, so that the guide wears out rather quickly, and on the other hand, vibrations are also generated in the electrode, which in turn negatively affects the current transmission
This vibration is also disadvantageous for the electrode guidance in the gap, because the electrode is forced to vibrate, which can cause a short circuit

Method used

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  • Welding electrode with structural surface
  • Welding electrode with structural surface
  • Welding electrode with structural surface

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Embodiment Construction

[0012] exist figure 1 In , the reference sign 1 denotes the core of the electrode, which may consist of copper, brass or, for example, a composite electrode such as a steel core wire surrounded by a copper layer. A shell 2 whose surface is structured is applied to the core 1 . exist figure 2 , 3 In , this structure is a helical structure. It is also possible to design this helix with a significantly higher pitch, up to the dimples running perpendicular to the electrode axis. After completion of the shell 2 with a structured surface, eg made of β-brass, the depressions 3 on the shell 2 are filled with a filler 4 made of metal or a metal alloy, which can be made of Made of gamma-brass rich in zinc, or pure zinc. In addition, zinc alloys containing 90% or more of zinc may also be used. The only prerequisite is that the filler 4 volatilizes very rapidly during the galvanic erosion, so that the actual structured surface of the shell 2 can be used for the subsequent galvanic ...

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Abstract

In order to achieve a reduction in wear of the wire guide rollers, apart from an improvement in the cutting speed and an improvement in current conduction, a wire electrode for spark erosion cutting of metals etc., comprising either a homogenous centre (1) made of a metal or of a metal alloy, or a composite centre, is provided with a sheath coating (2) whose surface is structured, wherein the indentations (3) created by the structure, are filled by a filler (4) made of an easily vapourable metal or of a metal alloy, so as to achieve a surface with little peak-to-valley height, i.e. with little surface roughness.

Description

technical field [0001] The invention relates to an electrode for electric discharge cutting of metals, conductive ceramics, etc., having a homogeneous or composite core made of metal or metal alloy and at least one sheath which wears away in galvanic erosion. Background technique [0002] When using welding electrodes, it has been found that welding electrodes with a sheath, such as beta-brass or gamma-brass, have a higher cutting efficiency than electrodes without such a sheath. This is based on the presence of a large amount of zinc in the β / γ-shell, which is buried in the microstructure. The disadvantage of such electrodes with a shell of β-brass or γ-brass is that the shell with a body-centered cubic lattice is significantly more deformable than a core usually made of face-centered cubic α-brass, which This results in local tearing of the surface of the covered electrode. In this case, as experiments have shown, cracks are advantageous in certain respects, since the cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/02B23K35/22B23H7/08C22C9/04
CPCB23H7/08
Inventor H·格罗斯B·巴特尔T·内特C·迪特里希
Owner BERKENHOFF GMBH
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