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Today we will learn about resistance welding principle, types, application, advantages and disadvantages. Resistance welding is a liquid state welding process in which the metal to metal joint created in liquid or molten state. It is a thermo-electric process in which heat is generated at the interface surfaces of welding plates due to electric resistance and a controlled low pressure is applied to these plates to create a weld joint.
In olden days, the process of metal welding can be done by heating the metals and pressed jointly which is known as forge welding method. But at present, the welding technology has been changed by the arrival of electricity.In the 19th century, resistance, gas and arc welding was invented.
Jul 8, 2023 · It is a liquid-state welding process, in which a metal-to-metal joint is made in a liquid or molten state. Resistance welding is also known as the thermo-electric process in which heat is produced at the interface surfaces of welding plates due to electrical resistance and controlled low pressure is applied to these plates to form the weld joint.
Resistance welding, sometimes called electric resistance welding (ERW),is a process by which metals can be joined together by applying pressure and conducting a strong electric current through the metal combination to heat up the welding joint and melt the metals, forging them together.
Resistance welding is a welding technology widely used in manufacturing industry for joining metal sheets and components. The weld is made by conducting a strong current through the metal combination to heat up and finally melt the metals at localized point(s) predetermined by the design of the electrodes and/or the workpieces to be welded.
Jan 12, 2024 · How Resistance Welding Works. Bulk Resistance: Metals have what is called a PTC or Positive Temperature Coefficient.This means that their resistance increases as temperature increases. Contact Resistance: When two surfaces come in contact, microscopically the surfaces are rough, where some points come in contact on the surface and some do not.At the points where contact is made and assuming the two pieces of metal are pressed together with some pressure, the oxide layer breaks forming a ...
Jun 14, 2021 · Resistance welding is a pressure welding process. The workpiece which will be welded is placed in between electrodes. Here two electrodes are used one is fixed and another is moveable as you can see in the diagram.
Resistance welding (RW) is the joining of two metals using pressure and electrical current, for a set length of time, through the area of the metal to be joined.
3/16 HEAT BALANCE – During resistance welding, part of the heat generated is lost to the surroundings by conduction (heat transfer through solids), convection (heat lost from exposed surfaces by air-cooling), and radiation (does not require a medium).
Nov 20, 2023 · Spot Welding: This technique is widely used to join overlapping metal sheets by applying pressure and passing a high electrical current through the metal. It’s popular in automotive and aerospace industries for its speed and efficiency in creating strong, durable welds.
