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生产中采用的外热式电炉或内热式不循环加热炉、在使作中常存在控温不准,因而造成加工质量不高、甚至返工、报废工件,或造成一些易燃物体着火的观象。我们在厂、车间领导的支持下,发扬“独立自主、自力更生”的革命精神,经多次试验研究,自制了内热式自动控温循环加热炉。这种炉控温准确,温度均匀,能保证工件质量;同时可以提高工作效率。节省用电,消除起火的危险。加热炉采用的自动控温电路如图所示。当电门K 扳到“自动”时,220V 交流电源经电门 K、高灵
External heating furnace or internal heating furnace used in the production is not allowed in the production of temperature control are often not allowed, resulting in processing quality is not high, or even rework, scrapped the workpiece, or cause some flammable objects on fire images. With the support of the plant and workshop leaders, we have carried forward the revolutionary spirit of “independence and self-reliance” and made many experiments and studies to make our own internal temperature-controlled automatic reheat furnace. This furnace temperature accurate, uniform temperature, to ensure the quality of the workpiece; the same time can improve work efficiency. Save electricity and eliminate the danger of a fire. Automatic temperature control circuit used in the furnace as shown. When the switch K to “automatic”, 220V AC power by the door K, high spirit