Closed loop control of penetration depth during CO2 laser lap welding processes

Abstract

In this paper we describe a novel spectroscopic closed loop control system capable of stabilizing the penetration depth during laser welding processes by controlling the laser power. Our novel approach is to analyze the optical emission from the laser generated plasma plume above the keyhole, to calculate its electron temperature as a process-monitoring signal. Laser power has been controlled by using a quantitative relationship between the penetration depth and the plasma electron temperature. The sensor is able to correlate in real time the difference between the measured electron temperature and its reference value for the requested penetration depth. Accordingly the closed loop system adjusts the power, thus maintaining the penetration depth.


Tutti gli autori

  • Sibillano T.; Rizzi D.; Mezzapesa F.P.; Lugarà P.M.; Konuk A.R; Aarts R.; Huis in't Veld B.; Ancona A.

Titolo volume/Rivista

Sensors


Anno di pubblicazione

2012

ISSN

1424-8220

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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