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High frequency induction heating application - widely used in heat treatment
The application range of high frequency induction heating is very wide. We use this method for welding in our lives and the processing of some important machine parts. Come on! Let me share relevant information with Kehua. ,hope its good for U.S. High frequency induction heating application High frequency induction heating application The frequency of the output current of the frequency conversion equipment depends on the inductance and capacitance on the main oscillation circuit. The oscillating loop is composed of electronic oscillating tube, inductance slave, spider and capacitor Ciz.C13, and it is directly combined with the primary of transformer B6 and capacitor C,s to form heating. 1. Principle The working principle of the high-frequency machine: the high-frequency current flows to the heating coil (usually made of copper tube) that is wound into a ring or other shape. When there is resistance in the heated object, a lot of Joule heat will be generated, which will increase the temperature of the object itself, so as to achieve the purpose of heating all metal materials. Our company's high-frequency equipment LH100-C2 is a tube type frequency conversion, that is, a high-power tube self-excited oscillator. The 50Hz three-phase 380V current is boosted by the anode transformer and then rectified into a 13kV DC current, which is converted into a high-frequency alternating current by a tube self-excited oscillator, and then is stepped down by a quenching transformer and output to the inductor to heat the workpiece. For the combination of oscillation and heating loop, a self-induced transformer coupling circuit with a short-circuit coil is used. The response voltage of the oscillating tube is composed of the secondary 117 of the response coil and the voltage dividing capacitor C113 to form a voltage, which is supplied to the grid of the oscillating tube. The starting and stopping of the oscillation tube is controlled by the grid voltage. The negative voltage of 1 OOOV supplied by the closed circuit is applied to the grid. When the DC high voltage on the anode is closed, the vibration is stopped; when the normally open contact of the heating relay is closed, the grid is closed. The negative voltage of the pole is grounded, the negative pressure is cut off, and the oscillating tube generates an anode current to start work. High-frequency induction heating application 2. Application of high-frequency induction heating and quenching is widely used in heat treatment production. It has the advantages of fast heating speed, easy control, high productivity, less oxidative decarburization, small deformation of quenched workpieces, good working conditions, no pollution and easy operation. Achieve the advantages of mechanization and automation. High-frequency equipment is mainly used for surface heat treatment of workpieces, such as surface quenching of gear teeth and pin sleeve shafts, which can improve its surface hardness, increase wear resistance, and can be used for welding and melting. 1. The high-frequency machine is used in the field of welding: welding of various diamond composite drill bits; welding of various cemented carbide cutter heads and saw blades; various picks, drill bits, drill pipes, coal drill bits, wind Welding of drill bits for mine fittings. 2. High-frequency machines are used in the field of quenching: quenching of various gears, sprockets, and shafts; quenching of machine tool bed guide rails in the machine tool industry; quenching of hardware tools. 3. The high-frequency machine is used in the field of diathermy: hot upsetting of various high-strength bolts and nuts; hot-rolled twist drills; diathermy casting of all parts within a diameter of 80. The application of high-frequency induction heating is indeed very extensive. It may be that we rarely hear such a professional term, and we are not familiar with it. If you want to know more, then pay attention to Kehua.