About Resistance Welding Machine (Spot Welding Machine) Introduction
Resistance welding is a high-speed method of joining metals by applying pressure and electrical heat under accurate controls.
The upper and lower electrodes are pressed against the workpiece, creating a certain resistance under pressure, and the welding current through the workpiece, the welding current is passed through the wrokpiece to generate heat energy, which causes the two workpieces to reach the same melting point and welding, then pressurized and close-fitting, froming a resistance welding in a fraction of a few second.
Resistance Welding Machine (Spot Welding Machine) Features
- When welding the workpiece, increase the pre-pressure to eliminate gaps between workpieces and make them fit tightly. It does not require any filler metals and gases.
- Simple operation, low deformation of the workpiece, the fast welding process and does not require any high skilled operators or professional technicians.
- The power required to operate is less to ensure the safe and no pollution working environment.
- It is suitable for welding mode of mass production due to its fast welding speed.
- Through the preheated pulses melt the plasticity of the workpiece, softening it for a tight fit and prevent spattering.
- It can assembly PLC device combine with AI calculate control system which will accurate control welding current and reduce CO2 exhaust.
How to operate the Resistance Welding Machine (Spot Welding Machine)?
The principle of double-sided, two-point overlapping welding is adopted. When welding the workpiece, the upper and lower electrodes are pressed against the workpiece, creating a certain contact resistance under pressure. The welding current creates an instantaneous thermal welding and circuit at the two contact resistance points, without affecting the internal structure of the welding workpiece.
Resistance Welding Machine (Spot Welding Machine) Application
Resistance welding machine is used to weld electrical conductivity metal plate and metal mesh. It is commonly used for welding thinner sheet metal and its widely used in the automotive industry for its high welding strength, which provides sufficient strength for the body of the vehicle and is completed within seconds by spot welding mode. It is also applied for the Metal Products Manufacturing Industry, Refrigerant Compressor Components, High Conductive Laminated Flexible Copper Shunt, Aerospace Industry, Precision Electronic Parts and Kitchen and Sanitary Supplied Industry,…etc.
What is heat effect affect for work piece?
It is the effect that is exerted to work piece by heat generated in welding. If the work piece overheat bear range, the work piece may change in color, discolor, deform, or may be breakable; parts will easy brittle. To reduce the heat effect, welding current must be a short duration of time applied on work piece. Inverter and capacitor welding system is best choice.
What is difference between each welding method?
- The resistance welding is suitable for flat sheet or weld nut application.
- The condenser projection welding is suitable for circumferential welding or multi welding high tensile sheet.
- The butt welding is suitable for raw material connect welding or bi metal connect application.
- The seam welding is suitable for raw material sheet overlap welding or continuity seal welding application.
- The heating welding is suitable for one piece big diameter work piece or high hardness small work piece application.
