Heat treatment facility for soft magnetic winding core in transverse magnetic field and method thereof

Abstract

The invention discloses a heat treatment facility for a soft magnetic winding core in a transverse magnetic field and method thereof. The invention is characterized in that: the invention comprises a longitudinal tunnel annealing furnace which is characterized in that an N polar plate and an S polar plate provided with neodymium iron boron magnetic pole are respectively arranged at the upper partand the lower part of a uniform temperature section of the furnace, a strong magnetic line of force from N to S along the vertical direction is generated between the N polar plate and the S polar plate, the external surfaces of the upper polar plate and the lower polar plate are connected to form a magnetic circuit, the integral magnetic pole is arranged above and below the surface of the tunnel annealing furnace, the tunnel annealing furnace is also internally provided with an airtight tank used for holding the winding core work pieces, the tank is filled with anti-oxidation gas. The invention can realize consecutive operation, the magnetic system is simple in structure, inexpensive in manufacture cost, easy for maintenance and low in fault rate, the invention requires no power supply device, can remarkably save energy, and the magnetic pole can be removed away or inserted into the furnace body at any time according to the need of charging and discharging of the furnace, and be favorable for the convenient charging and discharging of the furnace for the work piece.

Description

technical field [0001] The present invention relates to a special heat treatment method for magnetic materials and winding magnetic cores, and more specifically relates to a heat treatment equipment and method for soft magnetic winding cores under a transverse magnetic field. Background technique [0002] At present, the existing conventional transverse magnetic field heat treatment method for wound cores is to use the transverse magnetic field generated by a large coil with thousands of turns wound by copper wire, which usually requires a high-power DC power supply for a long time and a bulky excitation copper coil, which is expensive Moreover, the failure rate is high, and a large amount of electric energy is consumed in the heat treatment process. At the same time, due to the limitation of the volume of the coil, the effective space for the heat treatment workpiece is not large, which limits the furnace loading and efficiency. This method can only use periodic heat treatme...

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Problems solved by technology

[0002] At present, the existing conventional transverse magnetic field heat treatment method for wound cores is to use the transverse magnetic field generated by a large coil with thousands of turns wound by copper wire, which usually requires a high-power DC power supply for a long time and a bulky excitation copper coil, which is expensive Moreover, the failure rate is high, and a large amount of electric energy is consumed in the heat treatment process. At the same time, due to the limitation of the volume of the coil, the effective space for the heat treatment workpiece is not large, which limits the furnace loading and efficiency. This method can only use periodic heat treatment operations.

[0003] In addition, there are also other forms of transverse magnetic field heat treatment methods: wind the yoke shaft with dozens of turns of thick copper wire, pass through hundreds of amperes of direct current, put the workpiece between the two yoke plates at the other end of the yoke, coil, The yoke and the workpiece are heated together in the inner cover of the bell furnace for heat treatment in a transverse magnetic field. This method still requires a high-power DC power supply and consumes electric energy. Moreover, the coil and the yoke are prone to failure at high temperatures, and the heating consumes power. very low efficiency

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