| 摘要 |
PURPOSE:To project improving the magnetic property of iron cores and shortening an annealing time, by successively transferring the iron cores comprising an amorphous magnetic material under the condition that the iron cores surround a conductor provided through the main body of an annealing furnace equipped with a heating chamber and a cooling chamber and to which DC is applied. CONSTITUTION:Wound iron cores 10 comprising an amorphous magnetic material are placed in a manner such that they surround one of coupled conductors 12 each arranged in parallel with the other in the main body 11 of an annealing furnace and to which a positive or negative electric current is applied, and transferred through the main body 11 in the order of a heating chamber, a soaking chamber and then a cooling chamber. That is, after the first iron core 10 is inserted into the heating chamber and shifted by one pitch, applying an electric current to the conductor 12 is temporarily intercepted, a connecting piece 12a is detached, and the second iron core 10 is inserted into the conductor 12 and mounted on a conveyer 16. This operation is repeated by the same way in succession. In this way, many iron cores are continually charged in the main body 11 and annealed by rapidly cooling them in the cooling chamber after heating. During annealing, a magnetic field is formed by applying an electric current to the conductor 12 from an outer DC power source 14 to improve the magnetic property of the iron cores 10. |
