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The diameter of the electrode of the small playground equipment is selected according to the thickness of the workpiece to be welded

by:Jinma Rides     2022-09-07
Welding technology for small playground equipment: electrode diameter. The diameter of the electrode is mainly selected according to the thickness of the workpiece to be welded. The thinner the workpiece, the thinner the electrode used; the thicker the workpiece, the thicker the electrode used. Electrodes with a diameter of 3-5mm are widely used; welding speed. Welding speed refers to the speed at which the electrode moves in the welding direction. The welding speed of manual arc welding is generally not specified, but is mastered by the welder according to the size of the weld and the characteristics of the electrode.
Welding layers. In the manual arc welding of medium and thick steel plates, multi-layer welding should be used. For steel of the same thickness, when other conditions remain unchanged, the number of welding layers is increased, which is beneficial to improve the plastic toughness of the welded joint. The number of welding layers is determined according to practical experience. is the ratio of the thickness of the steel to the diameter of the electrode (integer).
arc voltage. The arc voltage mainly affects the weld melting width. The higher the voltage, the larger the melting width. The arc voltage is determined by the arc length, the arc voltage is high when the arc is long, and the arc voltage is low when the arc is short. During manual arc welding, the arc should not be too long, so the arc voltage is not high and the variation range is not large, generally 20-25V.
Welding current. Welding current is one of the main factors affecting welding quality and productivity. Increasing the current can increase the penetration depth of the weld and improve the productivity, but if the current is too large, the core of the electrode will be overheated, the coating will fall off, and it will cause defects such as undercut, burn-through, and welding. The structure will also change due to overheating; if the current is too small, it is easy to cause defects such as incomplete penetration and pinch flooding.
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