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Method and device for plasma cutting or plasma welding with laser support

A plasma welding and plasma technology, applied in the direction of plasma welding equipment, laser welding equipment, welding equipment, etc., can solve the problems of fluctuation and plasma beam expansion, small collision rate of charged particles, poor cutting results, etc.

Active Publication Date: 2016-08-24
TRUMPF WERKZEUGMASCHINEN GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the radial distance from the central region increases, the collision rate of charged particles becomes significantly smaller and the temperature, density, and conductivity of the plasma torch decrease
This causes fluctuations and enlargement of the plasma beam
During plasma cutting, this instability and the enlargement of the edge region of the plasma beam can produce irregular and thus poor cutting results

Method used

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  • Method and device for plasma cutting or plasma welding with laser support
  • Method and device for plasma cutting or plasma welding with laser support
  • Method and device for plasma cutting or plasma welding with laser support

Examples

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Embodiment Construction

[0044] FIG. 1 shows a plasma beam 1 which extends between a pointed electrode 2 serving as cathode and a metal workpiece 3 (plate) serving as anode and which is used for cutting ground depending on the application. Alternatively, the workpiece 3 is processed by welding. The plasma beam 1 has a central, radially inner region 4, in the center of which runs a central axis M which represents the shortest connecting line between the tip electrode 2 and the workpiece 3 and which It is consistent with the central axis of the rod-shaped electrode 2 . The collision rate of charged (ionized) particles 5 of the plasma gas (argon in the present example) is particularly high in the central region 4 of the plasma beam 1 . The high collision rate leads to high temperature and high conductivity of the plasma in the central region 4, which is strongly contracted and stable in shape, that is to say the plasma is typically substantially in thermodynamic equilibrium.

[0045] As the radial dist...

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Abstract

Methods, devices and systems for laser-supported plasma cutting or plasma welding of a workpiece. In one aspect, a method includes producing a plasma beam which extends in an expansion direction between an electrode and a processing location on the workpiece, the plasma beam having, with respect to a center axis of the plasma beam that extends in the expansion direction, an inner central region and an outer edge region, and supplying laser radiation to the outer edge region of the plasma beam. The laser radiation supplied to the outer edge region extends parallel with the center axis of the plasma beam.

Description

technical field [0001] The invention relates to a method and a device for plasma cutting or plasma welding with laser support. [0002] In plasma cutting or plasma welding, an electric arc is ignited between the cathode and anode. A hot plasma or a plasma beam of plasma gas having a temperature of more than 20,000 K is generated here by impact ionization. When plasma cutting or plasma welding metal workpieces, the cathode is usually arranged in the processing head, while the conductive workpiece to be processed forms the anode. Background technique [0003] Due to the generally adopted pointed shape of the cathode and the resulting electric field line density distribution, on the shortest connecting line between the cathode and the anode (the connecting line corresponds to the center axis of the plasma beam) and on the plasma torch or In the central region of the plasma beam adjoining the central axis, the collision rate of charged particles in the plasma is particularly h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/073B23K26/14B23K28/02B23K10/00
CPCB23K28/02B23K10/00B23K10/02B23K26/0734B23K26/348
Inventor A·波普T·黑塞T·凯泽
Owner TRUMPF WERKZEUGMASCHINEN GMBH & CO KG