SU607682A1

SU607682A1 - Electrode for air-arc cutting of metal

Info

Publication number: SU607682A1
Application number: SU762397498A
Authority: SU
Inventors: Георгий Леонтьевич Костенко; Евгений Михайлович Кравченко; Виктор Семенович Коцюбинский; Александр Григорьевич Пихай
Original assignee: Предприятие П/Я Г-4774
Priority date: 1976-08-23
Filing date: 1976-08-23
Publication date: 1978-05-25

Description

Изобретение может быть использовано при разделительной резке листового металла воздушно-дуговым способом.The invention can be used for separation cutting of sheet metal by the air-arc method.

Известен электрод дл воздушно-дуговой резки металла, выполненный в виде дискаKnown electrode for air-arc cutting of metal, made in the form of a disk.

1.one.

Применение этого электрода не позвол ет поддерживать постотизтво режимов резани , так как в процессе воздушно-дуговой резки измен етс угол резани (угол между поверхностью разрезаемотчэ металла и кромкой электрода), а следовательно, измен етс длина электрической дуги, что влечет за собой ухудшение устойчивости ее горени и, как следствие ухудшение качества реза и уменьшение производительности резани .The use of this electrode does not allow maintaining the post-pattern of cutting conditions, since during the process of air-arc cutting the cutting angle changes (the angle between the cutting surface of the metal and the electrode edge), and therefore the length of the electric arc changes, which leads to deterioration of its stability combustion and, as a consequence, deterioration of the cut quality and reduction in cutting performance.

С целью повышени качества реза путем обеспечени посто нства угла резани рабоча кромка предлагаемого электрода дл воздушно-дуговой резки металла выполнена по форме логарифмической спирали.In order to improve the cut quality by ensuring the constancy of the cutting angle, the working edge of the proposed electrode for air-arc cutting of metal is made in the form of a logarithmic spiral.

Форма рабочей кромки предлагаемого электрода описываетс уравнениемThe shape of the working edge of the proposed electrode is described by the equation

. где р - рассто ние от пентра . where p is the distance from the center

электрода до рабочей кромки; С - коэффициент, учитывающий ширину разрезаемого листа; - угол поворота электродаelectrode to the working edge; C - coefficient taking into account the width of the sheet being cut; - the angle of rotation of the electrode

вокруг центра вращени ; 0 - угол резани . around the center of rotation; 0 - cutting angle.

& 1попнение рабочей кромки электрода по форме такой спирали обеспечивает посто нство угла резаива по всей длине реза в силу посто нства угла между кромкой и касательной к ней.The & 1gap of the working electrode edge in the shape of such a helix ensures the constancy of the cutting angle along the entire cut length due to the constancy of the angle between the edge and the tangent to it.

На чертеже схематически изображен стнок дл воздушно-дуговой резки металла с использованием предлагаемого электродаThe drawing shows schematically a stack for air-arc metal cutting using the proposed electrode.

Claims

The machine contains electrodes 1 in the form of plates 2 rigidly fixed on the shafts, current leads 3 from power source 4 to the shafts and conductor 5 to the metal 6. The shaft 2 with the electrodes 1 co-amp is rotated one turn in opposite directions. Point A in the drawing is the point of contact of the electrode 1 with the metal being cut 6. The plot Am B of the logarithmic alcohol forms the working edge of the electrode. The cutting process is as follows. When electrode 1 is in contact with metal 6, an electric arc arises, the thermal energy of which melts m & tal. The removal of molten metal from the cut zone is carried out by feeding a stream of compressed air into it. Spiral vrashayushoy electrode compensates for the reaction, the urge of its supply in the direction of the cut, and the constancy of the angle between the working edge of the electrode and the tangent to it provides a constant arc length, and therefore the stability of its burning, which is the main quality jieaa and Biit high performance cutting. The expected economic effect from the implementation of the invention is 15 thousand rubles. The invention Electrode for air-arc cutting of metal, made in the form of a disk, characterized in that, in order to improve the quality of the cut by ensuring the constant angle between the surface of the metal being cut and the electrode edge, the working edge of the electrode is made in the form of a logarithmic spiral. Sources of information taken into account during the examination: 1. Copyright certificate SSSG number 235864, KJI. In 23 K 11/22, 1966.

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