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A mathematical model to compute the processing limit speed at laser material processing, assisted by an active gas jet

M. PEARSICĂ1,* , C.G. CONSTANTINESCU1, M.D. BENŢA2, C. STRÎMBU1, C. MIHAI2

Affiliation

  1. “Henri Coandă” Air Force Academy, Electronic Department, 160 Mihai Viteazu St, 500183 Brasov, Romania
  2. “Transilvania” University, 29 Eroilor St, 500036 Brasov, Romania

Abstract

This work is going to show a suitable method of determining a model of the limit processing speed, appropriate to laser material processing assisted by an active gas jet. In this purpose the multivariable regressive functions method was used, considering that process dependent variables as functions of independent ones represent surfaces in variables dimensional space. The most relevant input parameters of materials laser processing are the laser power, the assisting gas pressure, the thickness, and the material nature. An indirect way may be used to determine the processing limit speed, function of temperature distribution in the material. The mathematical model analyzed is based on the heat transfer equation in a homogeneous medium heathen by a laser beam. The theoretical results obtained by using the proposed method were confirmed by the practical ones..

Keywords

Laser, Processing limit speed, Regressive function, Heat equation, Temperature distribution.

Submitted at: July 5, 2011
Accepted at: Sept. 15, 2011

Citation

M. PEARSICĂ, C.G. CONSTANTINESCU, M.D. BENŢA, C. STRÎMBU, C. MIHAI, A mathematical model to compute the processing limit speed at laser material processing, assisted by an active gas jet, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 9, pp. 1135-1144 (2011)