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本文探讨了钢件在高频加热过程中的相变,从而导致振荡器工作状态的改变的内在变化关系,利用钢件感应加热时栅流变化的停滞点来确定加热规范。并通过电子式控温毫伏计的控制装置,实现成批工件的加热自动控制,代替了人工目测温度或时间继电器的控制方法。它的优点在于栅流的变化与加热钢件表面层组织转变密切相关,从而大大减免外界因素(油烟、水蒸汽的遮蔽以及工人视觉疲劳等)对温度测量及加热控制的影响。
In this paper, the phase transformation of steel during high-frequency heating is discussed, which leads to the inherent variation of the working state of the oscillator. The heating specification is determined by the stagnation point of the gate flow during induction heating. And through the electronic temperature control millivoltmeter control device to achieve batch automatic heating of the workpiece to replace the artificial visual temperature or time relay control method. The advantage of this method is that the change of the gate current is closely related to the transformation of the microstructure of the surface layer of the heating steel, so as to greatly reduce the influence of external factors (such as fume, water vapor shielding and visual fatigue of workers) on temperature measurement and heating control.