JP2800620B2 - How to cut transformer core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a transformer core.

[0002]

2. Description of the Related Art Conventionally, when a transformer core laminated with an amorphous magnetic ribbon is cut with a cutting wheel, one cutting plate is applied to each of the upper and lower sides in the lamination direction of the core, and clamped at two places together with the core. I was This is intended mainly to enhance the clamping force of the cutting portion.

[0003]

However, in this method according to the prior art, shavings and melt adhered to the cutting wheel enter the core from the side surface, and as a result, the cut surface is deteriorated by heat. Therefore, the present invention prevents shavings and molten material adhering to the cutting grindstone from entering the iron core and reduces the deterioration of the cut surface of the iron core due to heat.

[0004]

According to the present invention, an iron core on which an amorphous magnetic thin ribbon is laminated is provided with a single cutting plate at opposing positions on the outer peripheral side and the inner peripheral side of the iron core, and the iron core is cut. At the same time as the plate is clamped at two places, and between the two clamp positions, a protective plate is applied and fixed to at least the side surface of the iron core on the side where the cutting grindstone enters, and in that state, between the two clamp positions The above-mentioned iron core is cut together with the cutting plate and the protection plate by a cutting whetstone.

[0005]

[Function] When the iron core is cut by a cutting whetstone, the cutting whetstone continuously enters the iron core while rotating. Therefore, the outer circumference and side surfaces of the cutting whetstone being cut are shavings and molten material generated when the iron core was cut immediately before. Will try to enter the iron core newly with adhered. Here, the cutting can be performed in a state in which the shavings and the melt adhered to the cutting whetstone have been removed by cutting the cutting plate and the protection plate even immediately before the cutting whetstone cuts the iron core.

[0006]

FIG. 1 shows an example of the method of the present invention. An iron core 1 is for a transformer in which amorphous magnetic ribbons are laminated, and a pair of cutting plates 2 are applied to opposing positions on the outer peripheral side and the inner peripheral side, respectively. Clamp in two places. The presser bar 4 and the presser base 5 are clamped by bolts 6, and the protective plate 3 is applied to the gap between the bolts 6 and the side surface of the iron core 1, and the bolts 6 and the holding wedges 8 at two clamp positions are provided. Then, it is fixed to the side surface of the iron core 1. While rotating the cutting whetstone 7 in this state,
The iron core 1 is cut together with the cutting plate 2 and the protection plate 3 by moving between the clamp positions. Instead of moving the cutting whetstone 7, the iron core 1 may be moved.

The protective plate 3 applied to the side surface of the iron core 1 may be provided, if necessary, as shown in the cross section of the cut iron core in FIG.
It may be provided on both sides of the iron core 1.

[0008]

According to the present invention, by cutting the cutting plate and the protective plate immediately before the cutting wheel cuts the iron core, shavings and melts on the outer periphery and side surfaces of the cutting wheel are removed, and the heat is removed. Deterioration of the cut surface of the iron core due to the above.

[Brief description of the drawings]

FIG. 1 shows an example of the method of the present invention.

FIG. 2 is a diagram showing a cross section after cutting according to an example of the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron core 2 Cutting plate 3 Protective plate 4 Presser bar 5 Presser table 6 Bolt 7 Cutting whetstone 8 Wedge for holding

Claims (1)

(57) [Claims] 1. An iron core on which an amorphous magnetic thin ribbon is laminated, a pair of cutting plates are respectively applied to opposing positions on an outer peripheral side and an inner peripheral side, and the iron core is clamped together with the cutting plate at two places. , Between the two clamp positions, at least a side surface of the iron core on the side where the cutting grindstone enters is fixed by applying a protective plate, and in that state, between the two clamp positions, the iron core is also a cutting plate. A cutting method for transformer cores that is cut with a cutting wheel together with a protection plate.