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Method and system for detecting nozzle and electrode wear

A technology of electrodes and nozzles, which is applied in the system field of nozzles and electrodes loss, can solve problems such as waste, low efficiency, waste of additional costs, etc., and achieve the effect of prolonging life

Inactive Publication Date: 2003-07-09
THE ESAB GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Determining nozzle or electrode wear based on factors such as arc voltage variations can be wasteful and inefficient by not being able to accurately determine when the nozzle piece or electrode needs to be replaced, which in turn leads to unnecessary waste and additional cost

Method used

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  • Method and system for detecting nozzle and electrode wear
  • Method and system for detecting nozzle and electrode wear
  • Method and system for detecting nozzle and electrode wear

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Embodiment Construction

[0020] The invention will now be described in more detail with reference to the accompanying drawings. A preferred embodiment is shown in the drawing. The present invention, however, is capable of many embodiments and is therefore not to be considered limited to the examples given herein; the purpose of these examples is only to make the description of the invention more complete and complete and to inform the scope of the invention Those skilled in the art. Throughout the drawings, the same reference numerals refer to the same parts.

[0021] see now figure 1 , which shows a plasma arc cutting torch 10 . Plasma arc cutting torch 10 includes a nozzle member 12 and a tubular electrode 14 defining a longitudinal axis.

[0022] There are many different plasma arc torches equipped with the components used in the invention cited above. Since these torches are conventional and well known, they will not be described here. Similarly, there are many different types of power suppl...

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PUM

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Abstract

A system and method for detecting nozzle and electrode wear of plasma arc torches in which the average change in the stand-off between the electrode or the nozzle assembly of the plasma arc torch and a workpiece is monitored, and corrective measures are taken once the average change in the stand-off of the electrode and nozzle assembly exceeds a predetermined value. The corrective measures may include changing the arc voltage of the plasma arc torch, modifying the speed at which the plasma arc torch travels, modifying the average current of the power supply of the plasma arc torch, or the flow rate of the plasma supply gases or cut water of the plasma arc torch. The number of corrections is monitored so that after a predetermined number of such corrections, the system and method notifies an operator or the plasma arc torch itself that the electrode or surrounding nozzle requires replacement.

Description

technical field [0001] The present invention relates to a system and method for automatically detecting nozzle and electrode wear of a plasma arc cutting torch. Background technique [0002] The technique of cutting a metal workpiece into a desired shape using a plasma arc torch is well known in the art. As described by Carkhuff in US Pat. No. 5,216,221, a plasma arc torch applies a high voltage to an electrode to create an arc from the electrode and through a central bore of a nozzle member. A gas flow is created between the electrode and the nozzle member, which in turn generates a plasma flow through the central hole to the workpiece located below the nozzle member. [0003] During the working process, the cutting operation of the workpiece requires precise positioning of the plasma arc cutting torch, especially the precise positioning of the electrode and nozzle of the plasma arc cutting torch. Appropriate means may be provided to pass the torch or torches precisely ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/00B23K10/00G01B21/00H05H1/34
CPCB23K10/006H05H1/36H05H2001/3494H05H1/3494
Inventor 托马斯·F·奥克利
Owner THE ESAB GROUP
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