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Soldagem & Inspeção

versão impressa ISSN 0104-9224

Resumo

CUNHA, Tiago Vieira da  e  BOHORQUEZ, Carlos Enrique Niño. Device for the arc pressure measurement and its application on the TIG welding process study. Soldag. insp. [online]. 2014, vol.19, n.2, pp.152-158. ISSN 0104-9224.  http://dx.doi.org/10.1590/0104-9224/SI1902.07.

Considering the importance of the stagnation pressure of the arc in the formation of the weld pool or defects in the weld bead, and the difficulties associated with its measurement, mainly due to the high temperatures present in the arc, there was developed in this work a device designed to measure this pressure and an initial application in order to better understand the behavior of the pressure exerted by the arc on the surface of the weld pool. Experiments were realized in this study to identify the radial distribution of the stagnation pressure and its magnitude according to some welding variables, namely piece-electrode distance and size of the gas nozzle. The results indicate that the stagnation pressure of the arc is strongly influenced by the piece-electrode distance and to a lesser degree, the size of the gas nozzle and its radial distribution can be described by a Gaussian curve.

Palavras-chave : Stagnation pressure; Pressure measurement; voltaic Arc.

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