1. Welding principle
Projection welding: By pre-processing convex points on the workpiece, the current is concentrated on these convex points during welding, so that the convex points are melted and combined. Projection welding uses the principle of current concentration to improve the utilization efficiency of thermal effect.
Spot welding: Directly apply current and pressure to two metal surfaces to melt and weld the local metal together. Spot welding does not require additional convex point structure and is suitable for thinner metal plates.
2. Welding effect
Projection welding: The weld formed is circular and has a smooth surface, which is suitable for occasions requiring high sealing and strength.
Spot welding: The weld formed is straight and has obvious unevenness on the surface, which is suitable for connecting wires, terminals, etc.
3. Electrode wear and maintenance
Projection welding: Since the current is concentrated on the convex points during welding, the wear between the electrode and the workpiece is small, and it usually has a longer service life, which reduces the maintenance cost of the equipment.
Spot welding: The electrode directly contacts the workpiece and is easily worn. It needs to be replaced or polished frequently to ensure the welding quality.
4. Application scenarios
Projection welding: The advantages are high welding strength and good sealing, but the disadvantages are large thermal deformation during welding and difficulty in accurately controlling the welding position. It is suitable for scenarios that require multi-point welding and high-precision connection, such as automobile frames, electrical components, hardware, etc. Projection welding can complete the welding of multiple welding points at the same time, and can meet specific welding needs by adjusting the shape of the projections.
Spot welding: It is widely used in electronics, electrical appliances, hardware and other industries, mainly used for single-point welding of connecting wires, terminals and thinner metal plates. The advantages of spot welding are low cost, easy operation, and suitable for automated assembly line operations. But the disadvantage is that the welding strength is relatively low, and it is not suitable for occasions requiring higher loads and sealing performance.
FANMETAL TECH CO LTD is mainly engaged in the production and sales of Tungsten alloy, Molybdenum alloy, Cemented carbide, sputtering target, Titanium alloy, Tantalum zirconium , Iridium, and Cobalt alloy. We can provide customers with high-quality tungsten copper alloy spot welding electrodes. The size, specifications and shapes can be customized according to the drawings provided by customers.
