JPH0585616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for annealing a wound core made of an amorphous alloy in a magnetic field in order to improve the magnetic properties of the wound core.

[Prior Art] It is already known that magnetic properties of amorphous alloy wound cores used in various transformers are improved when annealed in a magnetic field compared to annealing without a magnetic field.

Conventionally, as an apparatus for continuously performing magnetic field annealing, a pair of parallel rod-shaped conductors are provided along the furnace length direction in an annealing furnace with a conveyor installed in the hearth, and one of the conductors is One end is electrically connected outside the furnace body, the other end is connected to an AC or DC power source, and one of the pair of conductors is inserted through the wound core to support it on the tray of the conveyor. Are known. (For example, JP-A-58-40811).

[Problems to be Solved by the Invention] The above-mentioned conventional magnetic field annealing furnace is characterized in that one of the conductors penetrates the center hole of the wound core while the wound core moves in the furnace. Because of this, the wound core has no choice but to be supported on the tray with its axis oriented laterally. For this reason, there was a problem in that during annealing, an uneven load was applied to the lower edge of the wound core due to its own weight, causing the wound core to deform. The present invention aims to solve these problems and provide an apparatus that can efficiently anneal without deforming the wound core.

[Means for solving the problem] A furnace body is conveyed by placing the wound core vertically on a tray, and a furnace wall is arranged parallel to the furnace length direction of the furnace body. A power supply rail is disposed within the seal box, a current collector with a conductive brush in sliding contact with the power supply rail is provided in a movable manner, and an excitation coil is attached to and detached from the wound core. At the same time, the excitation coil is connected to the current collector by passing through a long hole in the furnace wall in the longitudinal direction of the furnace, and as the wound core moves within the furnace main body, the current collector becomes sealed. Now moves within the box.

[Function] The inside of the furnace body and the inside of the seal box communicate with each other through a long hole, and a current is passed from the current collector inside the seal box to the excitation coil inside the furnace body to anneal the wound core in a magnetic field. I can do it.

[Example] In Fig. 1, 1 indicates a heating zone 1a and a cooling zone 1b.
2 is an inlet door thereof, 3 is an outlet door thereof, and 4 is a partition door between the heating zone 1a and the cooling zone 1b. A conveying device 5 is provided on the hearth, and trays 6,
6...The wound cores 7, 7 are placed horizontally so that their axes are vertical, and can be transported in the direction of the arrow. 8 is a seal box formed parallel to the furnace length direction of the furnace body 1 with the furnace wall 9 apart, and inside the seal box are wheels 10.
The current collectors 11, 11 . . . equipped with parallel rails 12
The current collector 11,
A conductive brush 13 provided at 11... is brought into sliding contact with a power supply rail 14 provided on the inner wall of the seal box 3. As shown in FIG.
5a is built in, and connection members 16, 16 are provided at both ends of the coil member 15a so that the ends of the excitation coil 15 can be connected to the connection members 16, 16, so that the excitation coil 15 is connected to the wound core 7. It is configured such that it can be attached and detached freely and forms one turn (or multiple turns). The excitation coil 15 is passed through an elongated hole 17 in the furnace wall 9 in the furnace length direction, and the other end of the excitation coil 15 is connected to the current collector 11 with connectors 18, 18. Further, the tray 6 and the current collector 11 are connected via a long hole 17 with a connecting member (not shown).
At the same time, as the wound core 7 moves within the furnace body 1, the current collector 11 can move within the seal box 8. The winding core 7 has a power supply rail 1
4. A predetermined alternating current or direct current is applied to the excitation coil 1 via the conductive brush 13 and the connectors 18, 18.
5 is energized to excite the wound core 7, and annealing can be performed in the magnetic field.

The seal box 8 communicates with the inside of the furnace body 1 through a long hole 17, but is sealed from the outside, so that a large amount of atmospheric gas inside the furnace body 1 flows into the seal box 8 together with hot air. There is no such thing. Therefore, the power supply rail 14 and the conductive brush 13
It can prevent overheating and contamination of the electrical contacts and maintain normal operation for a long period of time.

[Effects of the Invention] As detailed above, according to the present invention, the core can be placed flat on the tray and transported inside the furnace body 1 in a stable state, so that deformation of the core due to unbalanced loads does not occur. Can be annealed without Further, even when annealing cores having different shapes and dimensions, there are excellent effects such as eliminating the need for adjusting the mutual positions of the core and the excitation coil.

[Brief explanation of the drawing]

The drawings show an embodiment of the wound core annealing apparatus according to the present invention, and FIG. 1 is a longitudinal cross-sectional view thereof, and FIG. 2 is an enlarged cross-sectional view thereof. 1...furnace body, 6...tray, 7...wound iron core,
8... Seal box, 9... Furnace wall, 11... Current collector, 13... Conductive brush, 14... Power supply rail,
15... Excitation coil.

Claims (1)

[Claims] 1. A furnace body in which the core is placed horizontally on a tray and transported so that its axial center line is vertical, and a seal box formed across the furnace wall so as to be parallel to the furnace length direction of the furnace body. A power supply rail is disposed in a seal box, a current collector having a conductive brush in sliding contact with the power supply rail is movably provided, an excitation coil is removably wound around a wound core, and the excitation The coil is connected to the current collector by passing through a long hole in the furnace wall in the longitudinal direction of the furnace, so that the current collector moves within the seal box as the wound core moves within the furnace main body. A wound iron core magnetic field annealing device featuring: