The working principle and practical use of high frequency equipment

August 16, 2019

The high-frequency, high-current current of the high-frequency machine is wound into a heating coil that is wound into a ring or other shape (usually made of a copper tube high-frequency machine). Thereby, a strong magnetic flux whose polarity changes instantaneously is generated in the coil, and a heated object such as a metal is placed in the coil, and the magnetic flux penetrates the entire object to be heated, and is generated in a direction opposite to the heating current inside the object to be heated. Corresponding to a large eddy current. Since there is a resistance in the object to be heated, a lot of Joule heat is generated, and the temperature of the object itself rises rapidly. Achieve the purpose of heating all metal materials.
The practical use of high frequency machines is as large as heating, heat treatment, welding and annealing.
The first type: heating 1, hot forging is mainly after the workpiece is heated to a certain temperature (the heating temperature is different according to the material), and the workpiece is forged into other shapes by punching, forging or other forms. For example: case, watch embryo, handle, mold attachment, kitchen tableware, crafts, standard parts, fasteners, machining of mechanical parts, copper locks, rivets, steel brazing, hot extrusion of brazing tools, etc.
2. Thermal matching It mainly refers to the heating of the metal between different kinds of metals or between metal and non-metal, and the two are connected by the principle of thermal expansion or thermal melting. For example: the copper core of the computer radiator and the aluminum piece, the buried value welding of the speaker net, the composite of the steel-plastic tube, the sealing of the aluminum foil (toothpaste skin), the rotor of the motor, the sealing of the electric heating tube and the like.
3, smelting it mainly refers to the metal into a liquid by the high temperature of the metal, mainly suitable for iron, steel, copper, aluminum, zinc and various precious metals. Such as the melting of gold and silver.
The second type: heat treatment is mainly caused by the heating of the workpiece and the like, so that the hardness of the metal material changes, the specific application is as follows:
1, all kinds of hardware tools, hand tools. Quenching such as pliers, wrenches, hammers, axes, screwdrivers, scissors (garden shears);
2, a variety of car, motorcycle accessories. Such as crankshaft, connecting rod, piston pin, sprocket, aluminum wheel, valve, rocker shaft, transmission shaft, small shaft, fork, etc.;
3, a variety of power tools. Such as gears, shafts;
4. Machine tool industry category. Such as quenching of machine bed surface, machine tool guide rails, etc.
5, all kinds of hardware metal parts, machined parts. Quenching such as shafts, gears (sprocket wheels), cams, collets, clamps, etc.
6, hardware mold industry. Such as quenching of small molds, mold attachments, mold holes, etc.;
The third type: welding it mainly by heating to a certain temperature to melt the solder, so that two metals of the same material or different materials are connected together, the specific application is as follows: 1. Welding of various hardware tools: diamond tools, abrasive tools , drilling tools, alloy saw blades, carbide turning tools, milling cutters, reamer, planing knives, woodworking drills, etc.; 2, various hardware mechanical parts welding: hardware bathroom products, refrigeration copper fittings, lighting accessories, precision Mold fittings, metal handles, egg beaters, alloy steel and steel, steel and copper, copper and copper equivalent metal or dissimilar metal silver welding, brazing; 3, composite pot bottom welding is mainly used for round, square and other The three-layer brazing of the deformed flat stainless steel pot bottom and the aluminum sheet can also be used for other metal plane brazing. 4, electric kettle (electric coffee pot) heating plate welding is mainly used for brazing between stainless steel flat bottom, aluminum sheet and various shapes of electric heating tube.
Fourth: Annealing 1. Annealing in various stainless steel industries. Such as stainless steel pots, cans of annealing, annealing and annealing of the water tank, stainless steel tubes, stainless steel cutlery, stainless steel cups, etc.;
2. Annealing of various other metal workpieces. Such as golf clubs, clubs, copper locks, hardware copper fittings, kitchen knife handles, cutting edges, aluminum pots, aluminum barrels, aluminum radiators and all kinds of aluminum products.

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