High degree of automation, wider compatibility, and the ability to achieve semi-automatic or fully automated unmanned production. The heating is fast, with less surface oxidation, and the material utilization rate can reach over 99%. Non dielectric magnetic cutting heating - room temperature heating heat loss is less than 40%. The core surface temperature is uniform, and the fatigue strength of the mold is significantly improved by 5% -12%. The product's core surface is uniformly heated, and the overall forging yield rate is increased by 3% -5% or more