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What is High Frequency Induction Brazing? Introduction to the method of high frequency induction brazing-UZO induction brazing

by:Kehua     2022-08-03
What is high-frequency induction brazing? Many people have not been exposed to high-frequency induction brazing, and it is normal to not know about high-frequency induction brazing. When you want to buy after understanding high-frequency induction brazing, what should you buy? What? Here, the editor recommends Kehua's high-frequency induction brazing, and I hope it can help you! High-frequency induction brazing Induction brazing is a welding method that uses high-frequency, medium-frequency or power-frequency induced current as a heat source. High-frequency heating is suitable for welding thin-walled pipe fittings. The use of coaxial cables and split-type induction coils can be used for brazing at a site far away from the power source, which is especially suitable for welding of certain large components, such as pipe joints that need to be disassembled on rockets. It is also often used in pin welding in the electronics industry. It is used to heat the solder joints in the area at the same time, and the tin wire is sent to the solder joints through the tin feeding mechanism to complete the welding. Place the metal workpiece to be welded (generally red copper) in the induction coil, pass high-frequency alternating current, generate an induced electromagnetic field, couple the surface of the workpiece to generate an induced electromotive force, form an induced eddy current on the metal surface, and rely on the eddy current generated on the metal surface to generate heat, Solder powder is usually applied to the welding part, and the welding can be done when the workpiece reaches the melting temperature of the solder. Induction brazing is the cleanest and most environmentally friendly heating welding method in the world. High-frequency induction brazing Content The induction welding system usually includes: high-frequency generator, induction head, automatic tin feeding system, tin wire, circulating water cooling system, and smoke purification system [1]. Method During induction brazing, the brazed part of the part is placed in an alternating magnetic field, and the heating of this part of the base metal is achieved by the resistance heating of the induced current it generates in the alternating magnetic field. The higher the frequency, the smaller the current penetration depth. Although the surface layer is rapidly heated, the thickness of the heating is thinner. The interior of the part can only be heated by the heat conduction from the surface layer to the interior, which is the so-called skin effect. It can be seen that it is not beneficial to select an excessively high AC frequency, and a frequency of about 500 kHz is generally suitable. In addition, the skin effect is also related to the resistivity and permeability of the material. The greater the resistivity, the smaller the permeability, and the weaker the skin effect. On the contrary, the skin effect is more significant. Induction coil is an important component of induction brazing equipment. The basic principle of correct design and selection of induction coils is to ensure rapid, uniform and high efficiency of heating in the welding year. Usually, the induction coils are made of pure copper tubes. When working, the tube is cooled by water. The thickness of the tube wall should be less than the current penetration depth, generally 1~1.5mm. A gap should be maintained between the induction coil and the weldment to avoid short circuit, but in order to improve the heating efficiency, the gap between the turns of the induction coil and the weldment should be minimized. Induction brazing often requires some auxiliary tools to clamp and position the weldment. When designing the fixture, it should be noted that metal should not be used for the fixture parts adjacent to the induction coil to avoid induction heating. During induction brazing, foil, filament, powder and paste brazing filler metals can be used. The installed brazing filler metals should not form a closed ring, and flux and gaseous medium can be used to remove the film. High Frequency Induction Brazing Applications Induction brazing is widely used for brazing steel, copper and copper alloys, stainless steel, superalloys, etc. with symmetrical shapes, especially for pipe fittings, pipe and flanges, shafts and bushings , The turning tool head is welded to the saw blade; for the brazing of aluminum alloys, induction brazing can also be used, but the temperature control requirements are relatively high. The above is the relevant content about high-frequency induction brazing. After you have learned about high-frequency induction brazing, if you want to buy it, here I recommend Kehua's high-frequency induction brazing. have a look!
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