The utility model relates to an induction heating furnace, wherein an induction coil is wound on the outside of a furnace lining, and the furnace lining is a non-closed metal furnace lining.
There is a closed refractory insulation lining on the outside. The non-closed metal furnace lining can avoid the formation of short-circuit induced current. The furnace lining is directly used as the track for forging, and the hollow metal track is omitted, and the structure is simple. Because the hollow metal track structure without cooling water is not used, after the wear of the hollow metal track, the cooling water seepage will not cause the refractory furnace lining to be damaged. Accidents that cause damage to the heating coil and power supply extend the life of the induction heating furnace and reduce maintenance. In addition, the defect that the cooling water takes away the heat of the forging material is avoided, and the heat loss is reduced.
In the process of heating the forging material, the temperature is stable, uniform and controllable. The reasons are as follows: 1. The speed of the forging material on the metal furnace lining is stable and controllable; 2. The current through the heating coil is controllable.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic diagram of the application in the forging heating and pressing system
FIG. 2 is a schematic structural diagram of an embodiment
FIG. 3 is a schematic structural diagram of another embodiment
detailed description
According to FIG. 1 and FIG. 2, in an induction heating furnace, an induction coil is wound on the outside of the furnace lining. The induction coil 1 is spirally wound by a hollow copper tube. Cooling water is passed into the tube, and an adjustable current is passed through both ends of the coil 1. The furnace lining is a non-closed metal furnace lining 2. The metal furnace lining 2 should be made of a temperature-resistant and wear-resistant material, because the high-temperature forging material softened by heating has been continuously rubbing along the axial direction with the lower arc surface of the metal furnace lining 2. The metal furnace lining 2 should be selected from metal materials with low magnetic permeability, so as to minimize its eddy current loss. When the induction heating furnace is used for heating the forging material, the push rod 4 is extended when the pneumatic push rod 4 is in compressed air, pushing the cold forging material toward the heating furnace. After the compressed air is closed, the push rod 4 is retracted and cold forging Materials are added at any time. The heated hot forging material moves into the forging die 6 in the direction of the press 5. When the pressing machine 5 operates, after the upper and lower dies are closed, the forging material becomes the shape of the cavity. As shown in FIG. 3, another structure may also be adopted, which is provided with a closed refractory insulation furnace lining 3 outside the non-closed metal furnace lining 2.