The tempering furnace is an energy-saving cycle-type tempering furnace for tempering of ordinary metal parts in air and quenching, annealing and aging heat treatment of aluminum alloy die-casting parts, pistons, aluminum plates and other light-alloy parts.
The structure of the tempering furnace is made up of a cylindrical furnace body made of steel plate and section steel. The inner surface of the furnace cover is made of stainless steel. The lining is made of lightweight 0.6g/cm3 energy-saving microporous refractory insulation brick. The lining and the furnace shell are sandwiched with aluminum silicate fiber felt to keep warm, and the gap is filled with expansion and heat preservation powder. The electric resistance wire is spirally mounted on the wire brick of the furnace by a high-resistance alloy wire. A stainless steel loading basket is placed inside the hearth. The furnace cover is lifted by a manual mast. In order to uniformly heat the workpiece, a hot air circulation fan made of a heat-resistant stainless steel shaft and a fan blade is installed on the furnace cover, and during the heating process, the hot air is circulated up and down in the tempering furnace to ensure uniform heating of the workpiece. In order to ensure that the operation is equipped with a limit switch near the lifting mechanism, the switch is interlocked with the power supply of the tempering furnace control cabinet, and the power is turned on when the furnace cover is closed (working). When the furnace cover is opened, the limit switch cuts off the control power, so the power of the heating element is cut off at the same time to ensure the operator. The well type tempering furnace is equipped with automatic temperature control cabinet and thermocouple.
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