Small resistance spot welder for metal plate welding

The foot-operated spot welder adopts the foot-operated lever to apply pressure, which is easy to operate and quick to reflect, and suitable for all kinds of welding with precise positioning and complex shape. Occasion. Microcomputer control system, precise control of welding time and welding current, easy to adjust. Highly conductive silicon steel sheet, secondary overall structure, large output current, energy saving and environmental protection. The foot-operated spot welder is widely used in high quality welding of various kinds of metal handicrafts such as nets, baskets, plates, etc.

Since the contact area of the electrode determines the current density, the resistivity and thermal conductivity of the electrode material relate to the generation and dissipation of heat. The shape and material of the electrode has a significant effect on the formation of the nucleus. As the electrodes are deformed and worn, the contact area increases and the strength of the joint decreases. Oxides, dirt, oil and other particles on the workpiece surface increase the contact resistance. Overly thick oxides may even prevent the passage of current. Localized conduction, due to high current density, results in spattering and surface burnout. Thorough cleaning of the workpiece surface is therefore essential to ensure a quality joint. Spot welding is a method of resistance welding in which the base metal is melted by resistance heat to form a solder joint by assembling the joint and pressing it between two electrodes. . Spot welding is mostly used for the connection of thin boards, such as aircraft skins, aircraft engine sparklers, car cab housings, etc. The spot welder welding transformer is a spot welding appliance, which has only one loop in its secondary. The upper and lower electrodes and electrode arms are used both to conduct welding current and to transfer power. Cooling water circuit through the transformer, electrode and other parts to avoid fever welding, should first pass the cooling water, and then turn on the power switch. The quality of the electrode directly affects the welding process, welding quality and productivity. The electrode material is made of copper, cadmium bronze, chrome bronze, etc. The shape of the electrode is various, which is mainly determined according to the shape of welding parts. When installing the electrode, pay attention to the upper and lower electrode surface to keep parallel; the electrode plane should be kept clean, commonly used abrasive cloth or file to repair.