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Radio-frequency welding, also known as dielectric welding and high-frequency welding, is a plastic welding process that utilizes high-frequency electric fields to induce heating and melting of thermoplastic base materials. [1] The electric field is applied by a pair of electrodes after the parts being joined are clamped together.
Air acetylene welding (321) AAW Chemical welding process, not popular Limited Oxyacetylene welding: 311: OAW Combustion of acetylene with oxygen produces high-temperature flame, inexpensive equipment Maintenance, repair Oxygen/Propane welding 312: Gas welding with oxygen/propane flame Oxyhydrogen welding: 313: OHW
Low-frequency electric resistance welding (LF-ERW) is an obsolete method of welding seams in oil and gas pipelines. It was phased out in the 1970s but as of 2015 some pipelines built with this method remained in service. [3] Electric resistance welded (ERW) pipe is manufactured by cold-forming a sheet of steel into a cylindrical shape.
Dies are used to direct the welding process. When the press comes together, high frequency waves (usually 27.120 MHz) are passed through the small area between the die and the table where the weld takes place. This high frequency (radio frequency) heats the plastic which welds under pressure, taking the shape of the die.
Guerin process; Wheelon process; ... Radio frequency welding; High frequency resistance; ... Its specialize a wide range of energy-efficient electric motors up to ...
The apparatus used for induction welding processes includes a radio frequency power generator, a heating station, the work piece material, and a cooling system. The power generator comes in either the form of solid state or vacuum tube and is used to provide an alternating current of 230-340 V or a frequency of 50–60 Hz to the system.
An induction generator is used to produce high frequency current in the range of 2 to 10 MHz. [5] The range used is regulated by the FCC to avoid interference with broadcast signals. An induction coil converts the high frequency current from the induction generator into the necessary alternating magnetic field. A single turn coil may be used ...
The width of the dashed black lines is intended to show relative strength of the magnetic field integrated over the circumference at that radius. The four stages are A non-energized, B low frequency, C middle frequency, and D high frequency. There are three regions that may contain induced magnetic fields: the center conductor, the dielectric ...