1. The furnace body is surrounded by steel to form a large space, and the furnace is closed by the front door and the rear wall to form a space for heat exchange between hot air and aluminum profiles. The outside is made of A3 steel plate, which is continuously welded and reinforced with section steel, with sufficient strength and good air tightness. The inner panel is made of A3 steel plate, in order to adapt to the thermal change of the steel plate at normal temperature to 250°C.Vacuum Hardening Furnace 2. The furnace door adopts a rail-type design, and the furnace door is closed by the weight of the furnace door to ensure that the hot gas does not leak out during heating. The opening and closing of the furnace door is driven by a cycloid reducer, supplemented by a counterweight, and the self-locking of the electromagnetic brake motor is used to prevent the furnace door from falling and ensure safe operation.Heat treatment process of gear vacuum carburizing and quenching 3. The feeding cart is welded by section steel. The furnace is heated by the feeding cart. The traction chain of the feeding cart is driven by the cycloidal pin wheel reducer and the sprocket. The feeding cart travels along the rail, which is stable and reliable. The rails and material frames inside the material trucks shall be manufactured and installed by the buyer.X5032 X5040 VERTICAL METAL KNEE TYPE UNIVERSAL MILLING MACHINE 4. A gas burner is used for heating the furnace. The heated air is sent to the air distribution port on the feeder by the double-suction circulating fan, and is sprayed to the product to be heated in layers through the air distribution port. The flue gas is discharged through the chimney to maintain normal combustion. The temperature in the furnace is measured by thermocouples distributed reasonably before and after the furnace, and the firepower is controlled.X6132 X6140 HORIZONTAL LIFTING TABLE MILLING MACHINE