Thin wire inductive heating heat treatment system

Abstract

The invention discloses a thin wire inductive heating heat treatment system, which comprises wire unwinding equipment, a constant tension control device, an inductive heating device, a water tank and wire winding equipment which are connected in turn, wherein the inductive heating device is connected with an inductive heating power supply and a temperature measuring probe respectively. In wire heat treatment, the system has high heating efficiency and low energy consumption, and the leakage magnetic flux of an inductor is greatly reduced. Test data proves that: the conventional power consumption is 1,000 to 1,200 kilowatthours for each ton of wires, and the power consumption is only 280 to 320 kilowatthours for each ton of wires by the equipment; moreover, the heating speed is high, and can reach 100 meters / minute, and the system is suitable for wires with the diameter of phi2.5-phi6.

Description

technical field [0001] The invention belongs to the field of heating and heat treatment of thin wires, and in particular relates to a system for induction heating and heat treatment of thin wires. Background technique [0002] At present, the heating furnaces used in the heat treatment of domestic wire rods are still based on the "three old furnaces" imitating the Soviet Union in the 1950s - muffle furnaces, well furnaces, box furnaces, and trolley furnaces. These heating furnaces are heated by coal or resistance heating As a heating method, there are disadvantages such as poor sealing conditions, large heat storage, and slow heating speed, which cause a large heat loss in the furnace body and cause a lot of energy waste. Experimental test data proves that the power consumption is 1000-1200 kwh / ton of material when using the traditional resistance furnace heat treatment method. Coal is used as heating means, the pollution is relatively large, and the heating temperature cur...

AI Technical Summary

Problems solved by technology

However, the ideal heating effect cannot be achieved in the application of induction heating for thin wires (below ￠6). The reason is that the induction coil is used to heat the wires in a single induction way, as shown in the figure below. The cross-sectional area of ​​the wires is Φ m In the induction coil, a current is passed into the coil, and due to the Faraday effect, a magnetic flux perpendicular to the direction of the coil is generated inside the coil. The direction of the magnetic flux is consistent with the direction of the wire, and the internal production of the wire under the action of the magnetic flux catches up with the current i , the wire is heated under the action of current

[0004] Equipment output power during induction heating: The power applied to the wire is Due to the manufacturing process of the induction coil and the large current passing through the coil, for wires with a diameter less than 6mm, the diameter of the coil is much larger than the diameter of the thin wire, so the magnetic flux generated by the coil Φ m It is more than 3 times larger than the cross-sectional area D of the wire, so that the power applied to the wire is less than 1 / 3 of the output power of the equipment. Traditionally, the efficiency of heating the wire with a single induction coil is very low, the heating speed of the wire is slow, and the heating is not ideal. , the equipment cannot reach the rated power (the output power of the equipment cannot be adjusted), and the heating efficiency is low (large power consumption)

At present, many professional manufacturers and scientific research institutes at home and abroad are devoting themselves to the research of this technology, but no ideal solution has been seen so far.

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