电弧电磁收缩装置设计

IF 0.3 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Soldagem & Inspecao Pub Date : 2020-01-01 DOI:10.1590/0104-9224/si25.39

Miguel Guilherme Antonello, A. Bracarense

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引用次数: 5

摘要

摘要:两个电极之间的电位差导致电流打破该空间气体的介电屏障，从而产生等离子体放电，称为电弧。其结果是光度和温度的增加。电弧用于焊接，通常一个电极为直径小的圆柱形，另一个电极为面积大的圆柱形。由于这种配置，电弧的侧面具有钟形，并在与工件(焊池)接触时形成圆形压痕。通过使用电磁力，可以改变这种圆形压痕，从而完全改变焊接池的行为和几何形状。本文介绍了一种能使电弧的截面积由圆形变为椭圆形的电磁缩弧装置的研制和构造。本文主要进行了改变电弧形状所产生的电磁场的仿真、电弧收缩装置的研制以及该电弧收缩装置在板珠上的应用。结果表明，电磁力使电弧的横向轮廓由圆形变为椭圆形，提高了电弧的比功率，使电弧的定向更加精确。此外，改变椭圆的方向也会导致焊头的穿透和宽度的不同。

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Device Design for Electric Arc Electromagnetic Constriction

Abstract: The difference of potential between two electrodes results in electric current breaking the dielectric barrier of the gas in this space causing a plasma discharge called electric arc. As a result, there is luminosity and an increase in temperature. Electric arc is used for welding and usually one of the electrodes is cylindrical with small diameter and the other with large area. Because of this configuration, the side section of the electric arc has a bell shape and forms a circular impression in contact with the work piece (the weld pool). With the use of electromagnetic forces, it is possible to change this circular impression, completely changing the behavior and consequently the geometry of the weld pool. This article presents the development and construction of a device for the electromagnetic constriction of the electric arc, capable of changing the cross section of the impression from circular to elliptical. The steps performed in the article were the simulation of the electromagnetic fields generated to change the electric arc shape, the development of the arc constriction device and the application of this electromagnetic constriction in beads on plate. The results show that the electromagnetic forces change the transverse profile of the arc from circular to elliptical, enabling the increase in specific power and a more precise orientation of the electric arc. Also, changing the orientation of the ellipse results in different penetration and width of the bead.

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来源期刊

Soldagem & Inspecao 工程技术-冶金工程

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

12 weeks

期刊介绍： The Journal Soldagem & Inspeção (S&I) js a techno-scientific journal created in 1995. Printed issues of this journal are distributed free of charge to libraries in Brazil, Latin America and the Iberian Peninsula. It has been printed regularly every quarter since September, 2002, and, since the beginning of 2007, its electronic version is available in the address: (http://www.abs-soldagem.org.br/s&i/). The journal is sponsored by the Brazilian Welding Association (ABS). Since its creation several well known professionals working in welding contributed with the Journal Soldagem & Inspeção and its editorial board crosses the Brazilian borders. During its evolution the Journal received ta special contribution from the Editors-in-chief : Ronaldo Paranhos, Américo Scoti, Paulo Modenesi e Alexandre Bracarence. Since January 2012 the Editor-in-chief is Ana Sofia C. M. D’Oliveira, Full professor at Universidade Federal do Paraná (UFPR) . Her work focus mainly on Hardfacing and Physical Metallurgy. The jornal Soldagem & Inspeção also counts with 10 Associate Editors and a fix Editorial board of referees. short-term (Ad Hoc) referees can be invited to evaluate some papers submitted to the journal. The Soldagem & Inspeção journal is the scientific divulgation channel of the Brazilian Welding Association (ABS). It aims to publish original papers related to the scientific and technological development of welding, inspection, and related fields. Review papers or letters on current and controversial subjects are also published in the Journal. Its abbreviated title is Soldag. insp. (Impr.), which should be used in bibliographies, footnotes and bibliographical references and strips.