An electromagnetic induction heating device for heating metal workpieces

Abstract

The invention relates to an electromagnetic induction heating device for heating a metal workpiece, which comprises a control cabinet, a capacitor, a transformer and a heating coil. A primary coil in the transformer is serially connected with the capacitor and a secondary coil in the transformer is serially connected with the heating oil. A main control board, a driver transformer, a driver board, a power supply and four groups of insulated gate bipolar transistors (IGBT) are arranged in the control cabinet. The capacitor and the primary coil of the transformer are connected with a full-bridge inverter circuit which is formed by the four groups of IGBTs. The power supply sequentially passes through a rectifier circuit and a filter circuit and then is connected with the full-bridge inverter circuit. The control end of the main control board sequentially passes through the driver transformer and the driver board and then is connected with the control electrodes of the IGBTs. A mutual inductor is arranged in the series circuit of the capacitor and the primary coil of the transformer. The output end of the mutual inductor is connected with the feedback signal detection end of the maincontrol board. By adopting the technical scheme, the heating device has the advantages that the circuit structure is simple, the fault rate is low, the stability and the heating efficiency are very high, the frequency of alternating current can be adjusted according to the needs, the adjustment is simple and convenient and the adjustment range is wide.

Description

technical field [0001] The invention relates to an electromagnetic induction heating device, in particular to an electromagnetic induction heating device for heating metal workpieces. Background technique [0002] Quenching is an important process step in the manufacture of metal workpieces. Quenching can improve the hardness and wear resistance of metal workpieces, so it is widely used in various tools, molds, measuring tools and parts that require surface wear resistance, such as gears, rolls, carburized parts, etc. In the current quenching process, flames are usually used to heat workpieces. This heating method consumes fuel, and most of the heat is emitted to the environment during the heating process, which wastes a lot of energy and has a low energy utilization rate. The original flame heating method needs to heat the workpiece as a whole, and local heat treatment cannot be done, which consumes a lot of energy, and the overall heating causes large deformation of t...

AI Technical Summary

Problems solved by technology

In the current quenching process, flames are usually used to heat the workpiece. This heating method consumes fuel, and most of the heat is emitted to the environment during the heating process, which wastes a lot of energy and has low energy utilization.

The original flame heating method needs to heat the workpiece as a whole, and local heat treatment cannot be done, which consumes a lot of energy, and the overall heating causes large deformation of the workpiece, which affects the quality of the finished workpiece

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