Principle of high frequency induction soldering station

【Summary Description】 Principle of induction welding Principle of high frequency welding station High frequency welding station principle, high frequency welding high frequency current of the two major effects of the content is: Skin effect-a physical phenomenon in which the current distribution on the conductor section is uneven, the current density gradually increases from the center of the conductor to the surface, and most of the current flows only along the surface of the conductor. The lower the resistivity of the conductor, the higher the permeability, and the higher the frequency of the current, the more significant the skin effect. Proximity effect-when high-frequency currents flow in two conductors in opposite directions to each other or in a reciprocating conductor, a special physical phenomenon in which the current is concentrated on the adjacent sides of the conductor. High frequency welding usually uses the current frequency range of ~, sometimes also uses the low frequency. [1] High frequency welding is divided into high frequency resistance welding and high frequency induction welding. ① High-frequency resistance welding: Use rollers or contacts as electrodes to introduce high-frequency current into the workpiece. It is suitable for continuous longitudinal seam butt welding and spiral lap seam welding of pipes, welding of boiler fin tubes and heat exchanger spiral fins. The outer diameter of the weldable pipe is mm, the wall thickness is 16mm, and the thickness of the I-beam is 9.5mm, with high productivity. ② High-frequency induction welding: The workpiece is heated by an induction coil to weld small-diameter pipes with an outer diameter of 9mm and thin-walled pipes with a wall thickness of 1mm. It is often used for longitudinal seam welding of small and medium-diameter steel pipes and brass pipes, and can also be used for circumferential seam welding, but the power loss is larger than that of high-frequency resistance welding. The main parameters that affect the quality of high-frequency welding are the frequency of the high-frequency power supply, power, workpiece forming angle, extrusion force, the distance between the electrode (or induction ring) and the extrusion roller, and welding speed. The main equipment includes high-frequency power supply, workpiece forming equipment and extrusion machinery. High frequency welding has stable quality, high productivity and low cost. It is suitable for high-efficiency automatic production line and is an advanced method for producing seamed pipes. [3] High frequency welding has the following characteristics: 1, because the current is highly concentrated in the welding zone, the heating speed is extremely fast, so the welding speed can be as high as ~/min. 2. Due to the fast welding speed and the strong self-cooling effect of the weldment, not only the heat affected zone is small, but also the oxidation is not easy to occur, so the organization and performance of the weld are very excellent. 3. The surface of the weldment can not be cleaned before welding, thus improving the efficiency. 4. There are many kinds of metals that can be welded, and there are many shapes and specifications of products.

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