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The diameter of the welding rod for small playground equipment is selected according to the thickness of the workpiece to be welded

by:Jinma Rides     2021-08-20
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 more widely used; welding speed. Welding speed refers to the speed at which the electrode moves along the welding direction. The welding speed of manual arc welding is generally not specified, but is controlled by the welder according to the size of the weld and the characteristics of the electrode.
The number of welding layers. For manual arc welding of medium and thick steel plates, multi-layer welding should be used. For steels of the same thickness and other conditions remain unchanged, the number of welded layers increases, which is beneficial to improve the plastic toughness of the welded joint. The number of welded layers is determined based on practical experience. It is the ratio of the thickness of the steel to the diameter of the electrode (take an integer).
Arc voltage. The arc voltage mainly affects the melting width of the weld. The higher the voltage, the greater the melting width. The arc voltage is determined by the length of the arc. A long arc means a high arc voltage, and a short arc means a low arc voltage. In manual arc welding, the arc should not be too long, so the arc voltage is not high and the range of change is not large, generally 20-25V.
Welding current. One of the main factors affecting welding quality and productivity when welding current. Increasing the current can increase the penetration of the weld and increase the productivity. However, if the current is too large, the electrode core will overheat, the coating will fall off, and it will cause defects such as undercut, burn-through, and weld bead. At the same time, small playground equipment metal The structure will also change due to overheating; if the current is too small, it will easily cause defects such as incomplete penetration and pinch flooding.
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