Induction heating machine works based on the principle of electromagnetic induction. When high-frequency current passes through the induction coil, it generates an alternating magnetic field. When tool blanks or edges are placed within the magnetic field, eddy currents are produced. Due to the tool's own resistance, the eddy currents generate Joule heat, causing the tool to heat up rapidly. Compared to traditional heating methods, this heating method has an extremely fast heating speed. For example, when heating tool blanks for forging, induction heating machine can quickly heat the tool blanks to the suitable forging temperature, greatly improving production efficiency and reducing waiting time in the production process.
Induction heating machine can precisely control the heating temperature, time, and depth of heating. During the tool heat treatment process, different process stages require different heating conditions. For instance, during quenching, by adjusting the power, frequency, and other parameters of the induction heating machine, the edge can be precisely heated to the critical temperature required for quenching, ensuring the consistency and stability of the quenching effect. For overall heating of tool blanks preparing for forging, heating temperature can also be accurately controlled based on the material characteristics of the tool and forging process requirements, avoiding the impact on subsequent processing quality due to excessively high or low temperatures.
Induction heating machine, like the high frequency induction heater, possess excellent localized heating capabilities, which is very practical in tool heat treatment. For example, in the quenching stage, when only the edge needs to undergo quenching heat treatment, it can, through reasonably designing the shape and size of the induction coil, concentrate the alternating magnetic field in the edge area, realizing precise localized heating of the edge, while other parts of the tool are basically unaffected. This ensures the edge achieves the necessary quenching effect while avoiding unnecessary thermal effects on the entire tool, such as deformation and material property degradation caused by overheating.
When tool blanks need to be forged, they must first be heated to a suitable temperature to achieve good plasticity, facilitating subsequent forging deformation operations. Induction heating machine utilize the aforementioned electromagnetic induction principle to generate eddy currents within the tool blanks, causing rapid heating. Operators only need to set the appropriate heating temperature and time parameters on the equipment according to the material of the tool blanks and specific forging process requirements. The equipment will automatically heat the tool blanks to the predetermined temperature.
Improving Plasticity: After the overall heating by the induction heating machine, the tool blanks reach the suitable temperature, and their internal structure changes, weakening the bonding force between atoms. This greatly improves the material’s plasticity. During forging, the tool blank can more easily deform into the predetermined shape and size, reducing resistance in the forging process and improving forging efficiency and quality.
Ensuring Material Properties: By accurately controlling the heating temperature, the induction heating machine can ensure that during the overall heating of tool blanks for forging preparation, the material does not overheat or burn, preserving the original properties of the tool blank material. This lays a solid foundation for subsequent tool processing and usage.