JPS61124116A - Manufacture of wound core - Google Patents

Abstract

PURPOSE:To improve the rigidity of a wound core and to prevent the shape from varying by winding an amorphous magnetic steel strip on a bobbin made of an electromagnetic steel plate, and winding an outer periphery retainer made of the electromagnetic steel plate on the outer periphery. CONSTITUTION:A hard rubber 10 is engaged within a bobbin 9 using an electromagnetic steel plate, retaining fittings 11 are further engaged, and the square hole 12 of a center is press-bonded to a winding shaft 2 projected from the center of a flange 1. The winding start of an amorphous magnetic material steel strip 4 is wound on the bobbin 9, secured by an adhesive heat insulating tape 17, and the strip 4 is wound to form a wound core 15. Further, an outer periphery retainer 13 using an electromagnetic steel plate is wound from the outside, and the winding start is secured by an adhesive heat insulating tape to the outer periphery of the core 15, anti-slipped to the cut edge, and the core 15 wound with the steel strip is removed from the rubber 10 and the fittings 11 while the bobbin 9 remains mounted. Thus, since detrimental gas is not produced during annealing of the wound core, magnetic characteristic is not deteriorated, uniform magnetic characteristic can be obtained, the rigidity of the core is held, and the shape is not varied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a wound core, and more particularly to a method of manufacturing a wound core using an amorphous magnetic copper strip.

Conventional dazzling amorphous magnetic material copper strips are characterized by significantly lower loss and excitation current than grain-oriented silicon steel strips. However, on the other hand, the plate thickness of the amorphous magnetic material copper strip is extremely thin, ranging from λ0 to 50 microns.

Now, with reference to FIG. 4, the state of winding the amorphous magnetic material copper strip onto the winding frame will be explained. First, the tip of the drive shaft of the winding device (not shown) is made into a rectangular winding shaft, and a square hole (not shown in the figure) formed in the center of the flange L is fitted onto the winding shaft. The winding axis λ is made to protrude from one side of the seventh flange l, and the square hole j formed in the center of the winding frame 3 is fitted into this protruding winding lI41I, so that the winding frame 3 is connected to the seventh flange l and the winding frame. Fix it in place.

At this time, the amorphous magnetic material copper wire is returned from an uncoiler (not shown), and the beginning of the copper strip is fixed to the winding frame 3 with adhesive tape via the tension roll 6. Then, rotate the drive shaft of the winding device, the tamper winding @λ, and rotate the winding frame 3.
A wound iron core r is manufactured by winding an amorphous magnetic material steel strip ≠ around the outer periphery of the iron core until a predetermined thickness is reached, and fixing the end of the winding #) with an adhesive tape 7 (FIG. 5). Furthermore, this rolled iron core? is removed from the flange L together with the winding frame 3, and annealed with the winding frame 3 still attached.

In view of the problems to be solved by the present invention, the conventional method of manufacturing a round-wound core using amorphous magnetic copper strips has many drawbacks.

111 There is a phenomenon in which gas is generated due to combustion of the adhesive tape 7 during annealing, and this gas deteriorates the magnetic properties.

(2) During annealing, the winding frame 3 is left hanging around the winding core t, so the existence of this winding frame 3 allows heat to be transferred to the PI3 side of the p-winding core. Temperature differences occur locally, making it difficult to obtain uniform magnetic properties.

(3) As shown in Figure 5, amorphous magnetic material @Tei≠
is thin and has low rigidity, so when the winding frame 3 is removed, the winding core ♂
The shape of the product undergoes abnormal deformation and cannot maintain the desired shape.

[l Because the amorphous magnetic material copper strip is annealed, it is not brittle and easily breaks during handling, which deteriorates the magnetic properties.

Means for Solving the Problem Non-invention is the solution to the above problem, that is, the first method.
The second invention is a method for manufacturing a wound core formed by winding an amorphous magnetic steel strip, in which the amorphous magnetic copper strip is wound around a winding frame made of an electromagnetic copper plate, and an outer circumferential holding plate made of an electromagnetic steel plate is wound around the outer periphery of the amorphous magnetic copper strip. A method for manufacturing a wound iron core is characterized by the following.

The second invention is to wrap the outside of the inner and outer circumferential picks, winding frame, amorphous magnetic material copper strip, and outer circumferential holding plate of the wound iron core produced according to the first invention under tension with an adhesive heat-resistant insulating tape. A method of manufacturing a wound core, which is characterized by fixing the winding and then annealing it.

Embodiments Below, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

As shown in each figure, a smaller hard rubber 10 for holding down the reel frame is fitted into the desired shape, and a holding fitting /I smaller than this hard rubber 10 is fitted inside it. Square holes 12 formed in the center of the presser metal fitting 11 are fixed in alternate layers to the windings 12 [11] protruding from the center of the seven flange l.

Then, the beginning of the winding of the amorphous magnetic material steel strip is wound around the winding frame made of the electromagnetic steel plate via the tension roll 6 and fixed with an adhesive heat-resistant insulating tape 17. Thereafter, the drive shaft and the pick winding shaft of the winding device are rotated to wind the amorphous magnetic material copper strip until a predetermined winding thickness is obtained, thereby forming the wound iron core /j. Next, an outer circumferential presser plate 13 made of an electromagnetic steel plate is wound from the outside via a tension roll t, and the winding start point is the wound core l! of the wound amorphous magnetic steel strip. Adhesive heat-resistant insulating tape (
(not shown in the figure), wrap it once or several times,
After that, it was cut and the cut edge was fixed with 14t of adhesive heat-resistant insulating tape, and then the hard rubber 10. Remove the wound core /1 made by winding the amorphous magnetic material steel strip from the presser metal fitting // with the magnetic steel sheet winding frame still attached.

Thereafter, as shown in FIG. 3, an adhesive heat-resistant insulating tape/7 is wrapped and fixed while applying tension to the outside of the wound core/J- and the outer circumferential press plate 13 made of steel plate. Annealing is performed in this state.

Effects of the Invention According to the above-mentioned uninvented method, there is no glaze layer tape made of resin between the cores formed by winding amorphous magnetic material steel strips as in the past, but adhesive heat-resistant insulating tape is used instead. Since the tape is used, no malignant gas is emitted during annealing of the wound core, so the magnetic properties are not degraded. In addition, since the amorphous magnetic material WS Firefly is wound around the inner and outer peripheries of the winding frame made of electromagnetic steel plate and the outer periphery of the metal-wound core, the annealing temperature is not uniform on the outside of the winding core. Magnetic properties can be obtained. Furthermore, since the rigidity of the wound core is maintained by the winding frame made of electromagnetic steel plate, the desired shape can be obtained without any change in shape.

In addition, an adhesive heat-resistant insulating tape is applied from the outside of the winding frame (made of electromagnetic steel sheets applied to the inner and outer peripheries of the amorphous magnetic steel strip mentioned above) and the outer periphery press plate so as to wrap around the inner and outer peripheries of the wound core. By winding the core, it is possible to improve the rigidity of the wound core, prevent changes in shape, prevent breakage during handling, prevent unexpected external forces from being applied, and improve magnetic properties.

[Brief explanation of drawings]

Fig. 1 is a side view of a wound core according to an embodiment of the uninvented method, Fig. 2 is a perspective view of the wound core during winding and forming, and Fig. 3 is an adhesive heat-resistant insulating tape applied to the wound core in the pre-annealing process. FIG. 4 is a perspective view of the process of winding the shear amorphous magnetic material steel to form the wound core by the conventional method, and FIG. FIG. 3 is a perspective view of a formed wound core. l...7 langes, λ...winding shaft, Hiroshi...amorphous magnetic steel strip, ? ...Reeling frame using electromagnetic steel plate, IO...
・Outer periphery holding plate using magnetic steel plate, l≠, /7...Adhesive heat-resistant insulating tape, /j...Wound iron core. 16th turn 11th and other set heart attack line day 7゜

Claims (2)

[Claims] (1) In a method of manufacturing a wound core formed by winding an amorphous magnetic steel strip, the amorphous magnetic copper strip is wound around a winding frame made of an electromagnetic copper plate, and an outer peripheral presser plate made of an electromagnetic steel plate is wound around the outer circumference of the amorphous magnetic copper strip. A method for manufacturing a wound iron core characterized by: (2) In a method for manufacturing a wound core formed by winding an amorphous magnetic steel strip, the amorphous magnetic copper strip is wound around a winding frame made of an electromagnetic copper plate, an outer circumferential holding plate made of an electromagnetic steel plate is wound around the outer periphery of the amorphous magnetic copper strip, and further A method for producing a wound core, comprising: wrapping and fixing the winding frame, the amorphous magnetic steel strip, and the outside of the outer peripheral presser plate with an adhesive heat-resistant insulating tape under tension, and then annealing.