NDLI: Optimization of plasma arc cutting of mild steel thin plates

Content Provider	IEEE Xplore Digital Library
Author	Colombo, V. Concetti, A. Ghedini, E. Dallavalle, S. Fazzioli, R. Vancini, M.
Copyright Year	2008
Description	Author affiliation: Dept. of Mech. Eng., Univ. di Bologna, Bologna (Colombo, V.; Concetti, A.; Ghedini, E.)
Abstract	Summary form only given: Plasma arc cutting (PAC) is a widely used industrial process for the cutting of different types of metals in several operating conditions. PAC is considered a challenging technology compared to its main competitors: oxy-fuel and laser cutting, in particular for cutting of mild steel in the thickness range 8-40 mm. PAC of mild steel thin plates through a Cebora HQC Plasma Prof 164 plasma source, operating in the range 25-120 A, with a Cebora CP250G plasma torch have been studied. PAC of mild steel thin plates (thickness in the range 1-3 mm) is characterized by low current levels (25-45 A) and the use of $O_{2}$ both as plasma gas and secondary gas. The aim of the work is the optimization of PAC of mild steel thin plates, both in terms of cut quality and performances of the consumables, to achieve cut quality standards and productivity levels usually obtainable through laser cutting processes. The first part of the work points out the main critical aspects of the considered cutting process, concerning both the obtained qualitative standards and the performances of the consumables, in particular of the nozzle, in terms of its service life. In the second part of the work, the optimization the process has been carried out through the simultaneous planning and analysis of experimental tests and numerical simulations. Experimental tests have allowed a better design of consumables, in particular nozzle, electrode and diffusers, and to optimize current profiles, in particular pilot arc current levels; while modelling and numerical simulation have allowed a better understanding of the physical phenomena concerning the critical aspects initially pointed out and to detect successful design solutions. The integration of the results of these two activities has allowed to overcome the critical aspects initially pointed out, improving plasma jet constriction and reducing plasma jet instabilities, leading to a better cut quality and performances of the consumables.
Starting Page	1
Ending Page	1
File Size	34069
Page Count	1
File Format	PDF
ISBN	9781424419296
ISSN	07309244
DOI	10.1109/PLASMA.2008.4590969
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasmas Optimization Standards Numerical simulation Laser beam cutting Electrodes Conferences
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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