| 摘要 |
PURPOSE:To obtain a transformer core made of an amorphous magnetic thin strip easily and economically by a method wherein the amorphous magnetic thin strip is wound a required turns to form a rectangular wound body and its end surface is solidified by a heat resistant adhesive and the wound body is annealed in the magnetic field. CONSTITUTION:An amorphous magnetic thin strip 2 is wound around a free-rotating drum 1 and wound around a rectangular frame 4 via guide rollers 3 to form a wound body 2a. The wound body 2a becomes round with the progress of the winding. So the wound body 2a is removed with the frame 4 and pressed by plates 5 attached to the leg parts and the yoke parts to have the prescribed rectangular shape. Then the laminated end surfaces of both sides of the wound body 2a is coated by ceramic system heat resistant adhesive to the extent that it does not penetrate between layers and the adhesive is hardened by heating. An exciting coil 6 for magnetic field annealing is wound around the leg part of the wound body 2a which is kept in rectangular form and the body 2a is put into an annealing furnace 10 filled with inert gas and the temperature in the furnace 10 is risen to approximately 350-500 deg.C and at the same time direct current is applied to the coil 6 to perform the annealing at the temperature below Curie's point. |
