JPH02246305A - Method for winding saddle type coil - Google Patents

Abstract

PURPOSE:To realize winding in a regularly arranged state by winding wiring material by arranging pressing jigs in the manner in which a space equivalent to one layer of wiring material which is to be wound around a winding core is formed between the pressing jig and the winding core. CONSTITUTION:Pressing jigs 25 are arranged so as to face a winding frame 22 in the manner in which a space 24 equivalent to one layer of wiring material to be wound around a winding core is formed. The inner peripheral surface 27 of the pressing jig 25 is made similar to the outer peripheral surface 26 of circular arc type section of a winding frame 22, and the space equivalent to one layer is formed between the outer peripheral surface 26 and the inner peripheral surface 27. By putting the winding core 21 in a groove 28 of the pressing jig 25, the pressing jig 25 can be positioned to the winding core 21. As a result, the movement of the wiring material 23 to be wound around the winding core 21 is regulated in the space 24. Thereby a saddle type coil 20 wherein the wiring material 23 is wound in a suitable orderly state can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of winding a saddle-shaped coil whose longitudinal direction extends in an arc shape.

[Prior Art] For example, when trying to obtain a superconducting magnet using a superconducting wire, a winding technique is required to form a coil made of the superconducting wire. On the other hand, depending on the use of such a superconducting coil, it may be necessary to wind the coil in a saddle shape.

The method of winding a saddle-shaped coil that extends linearly in the longitudinal direction is well established, and is carried out, for example, as shown in FIG. That is, a saddle-shaped winding frame 1 is prepared in order to give the coil a saddle-shaped shape. A winding core 2 is positioned on the winding frame 1 and fixed by suitable means. In this state, a wire 3 made of, for example, a superconducting material is wound around the winding core 2 along the winding core 2, and thereby,
A coil 4 is formed. At this time, in order to adjust the shape of the coil 4, the wire rod 3 is pressed from the outside as shown by an arrow 6 using a plurality of pushing jigs 5. The pushing jig 5 is slidably held on the winding frame 1 in order to adapt to the outer dimensions of the coil 4, which becomes thicker as the wire 3 is wound.

[Problems to be Solved by the Invention] The above-described winding method is for obtaining a saddle-shaped coil that extends linearly in the longitudinal direction. Therefore, even if this winding method is applied as is, it is not possible to obtain a saddle-shaped coil whose longitudinal direction extends in an arc shape.

The arcuate saddle-shaped coil as described above is advantageously used, for example, in a bending magnet for a synchrotron. In order to obtain such a saddle-shaped coil having an arc shape, it is necessary to use a winding core whose longitudinal direction extends in an arc shape, and to
It is simply conceivable that instead of the linear winding frame 1 shown in the figure, a winding frame whose longitudinal direction extends in an arc shape may be used.

However, in order to align the wire rods 3 to form the coil 4 while pressing the wire rods 3 only from the sides with the pushing jig 5, the wire rods 3 must be aligned in a manner substantially similar to that shown in FIG. 3, relatively large rigidity is required, and for this reason, tape-shaped wire rods or keystone-type wire rods with a width of about 10 to 20 mm are generally used. For example, it is difficult to obtain an arcuate saddle-shaped coil by a method substantially similar to that shown in FIG. 7 using a thin wire with a diameter of about 1 mm. That is, when winding is carried out using such a thin wire by simply pressing the wire from the side with a pushing jig 5 as shown in FIG.
The wire may be crushed or it may run over already wound wire.

This will be explained with reference to FIG.

FIG. 8 schematically shows a state in which the wire rod 3a is wound around the arc-shaped winding core 2a.

On the outer peripheral side of the winding core 2a, tensions as shown by arrows 7 and 8 act on the wire 3a, and their combined tension is represented by an arrow 9. On the other hand, on the inner peripheral side of the winding core 2a, tension as shown by arrows 10 and 11 acts on the wire 3a, and the combined tension is represented by an arrow 12. As can be seen from the direction of these composite tensions 9 and 12, especially on the inner peripheral side of the winding core 2a, the composite tension 12 acts in a direction that lifts the wire 3a from the winding core 2a,
The alignment of the wire rods 3a becomes more likely to become disordered.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a method for winding a saddle-shaped coil whose longitudinal direction extends in an arc shape, in which even a thin wire can be wound while maintaining proper alignment. It is.

[Means for Solving the Problems] As described above, the present invention is directed to a method of winding a saddle-shaped coil whose longitudinal direction extends in an arc shape. It is characterized by the following steps. In other words, a winding core whose longitudinal direction extends in an arc shape should be positioned on a saddle-shaped winding frame whose longitudinal direction extends in an arc shape so that their respective longitudinal directions are aligned, and the winding core should be wound around the core. The method includes steps of arranging a holding jig so as to face the winding frame to form a space for one layer of the wire, and winding the wire around the winding core in this state.

Initially, the space for one layer of the wire to be wound around the core is formed by the holding jig and the winding frame, but when the wire is wound in multiple layers, this space is It is formed by a holding jig and a layer of already wound wire.

Further, as described above, when the wire is wound in multiple layers, it is preferable that an insulating sheet is placed on the already wound wire.

[Effect]

In this invention, the wire to be wound is wound around the winding core while being received in a space corresponding to one layer of the wire regulated by the holding jig.

[Effects of the Invention] Therefore, according to the present invention, the presser jig forms only a space for one layer of the wire to be wound around the winding core, so that the wire rod to be wound around the winding core is It can be wound in an aligned state within the space while being regulated by the holding jig.

Note that when winding wire into multiple layers, the space for one layer of wire to be wound around the winding core is formed between the holding jig and the layer of wire that has already been wound. At this time, if an insulating sheet is placed on the already wound wire layer, it is possible to eliminate the unevenness formed on the surface of the already wound wire layer. Therefore, the friction between the layer of wire that has already been wound and the wire that is about to be wound is reduced, thereby enabling smooth winding work, and the insulation coating formed on the surface of the wire. No damage is caused and, moreover, it becomes possible to provide more complete insulation by the insulation sheet itself.

Moreover, the wire rod wound by the method according to the present invention is
It is preferable to fix with an adhesive in order to prevent the aligned state from collapsing during subsequent handling. As the adhesive, quick-drying adhesives, self-fusing resins, etc. are advantageously used.

[Embodiment] An embodiment of the present invention is shown in FIGS. 1 and 2. This example relates to a method of winding a bipolar saddle coil. FIG. 61 shows a plan view, and FIG.
FIG. 2 shows an end view of a section taken along the line ■-■ in FIG. 1;

First, a winding core 21 whose longitudinal direction extends in an arc shape is prepared. Also, a saddle-shaped winding frame 2 whose longitudinal direction extends in an arc shape is also provided.
2 will be prepared. The center angle of the winding core 21 and the winding frame 22 with respect to the circular arc formed by each of them is selected to be about 90 degrees. The winding core 21 is positioned directly above the winding frame 22 so that their longitudinal directions are aligned. Although not shown, this positioning state is fixed by suitable fixing means.

To form the coil 20, a wire 23, such as a superconducting wire, is wound around the winding core 21. The superconducting wire used is preferably made of a flexible alloy, but superconducting wires made of other materials may also be used. Furthermore, a normal conducting wire may be used as the wire 23 instead of a superconducting wire. The wire 23 is thin and has a diameter of about 1 mm.

As described above, when the wire rod 23 is wound around the winding core 21, the holding jig 25 faces the winding frame 22 so as to form a space 24 for one layer of the wire rod 23 to be wound. It is arranged like this. As clearly shown in FIG. 2, the presser jig 25 has an inner circumferential surface 27 similar to the outer circumferential surface 26 of the winding frame 22, which has an arcuate cross section, and has a space 2 for one layer described above.
4 is formed between the outer circumferential surface 26 and the inner circumferential surface 27. In addition, a groove 28 is formed in the presser jig 25, and the winding core 21 is received in this fj28, so that
The presser jig 25 is positioned relative to the winding core 21.

In this way, the wire 23 is rolled around the winding core 21 while being pushed into the space 24 corresponding to one layer with a relatively weak force. At this time, the movement of the wire rod 23 is restricted by the outer circumferential surface 26 of the winding frame 22 that defines the space 24 and the inner circumferential surface 25 of the presser jig 25, so the wire rod 23 rides on the already wound portion of the wire rod 23. I won't raise it. Therefore, a saddle-shaped coil 20 is obtained that includes wire rods 23 wound in a proper alignment state. In order to maintain such an aligned state of the wire rods 23, after winding of the wire rods 23 is completed, the condition may be fixed using, for example, an anaerobic and quick-drying adhesive.

Instead of using a quick-drying adhesive as described above, the wire rod 23 is coated with a self-fusing resin in advance, and after being wound, the saddle-shaped coil 20 is heated to a temperature that allows self-fusing. The form may be fixed. When a superconducting wire is used as the wire 23, it is important to select the heating temperature within a range that does not deteriorate the performance of the superconducting wire.

When the above steps are completed, the winding core 21 is removed from the presser jig 25 and the winding frame 22, and thereby the winding frame 2
A bipolar saddle-shaped coil 20 is obtained, which is composed of a wire rod 23 wound around the wire rod 2 and a wire rod 23 wound around the wire rod 23.

The wire can also be wound in multiple layers as shown in FIG. FIG. 3 is a diagram corresponding to FIG. 2 described above.

After winding the first layer of the wire 23, the presser jig 25 shown in FIG. 2 is moved to another presser jig 25 as shown in FIG.
exchanged with a. The presser jig 25a includes an inner circumferential surface 27a having a smaller curvature, that is, a larger radius of curvature, than the inner circumferential surface 27 of the presser jig 25. A space 24a for one layer of the wire 23 to be wound is formed between the outer peripheral surface 29 and the inner peripheral surface 27a of the first layer of the wire 23. Further, like the presser jig 25, the presser jig 25a is similar to the presser jig 25.
The receiver is provided with a groove 28a into which the receiver is inserted.

In this way, the second layer of the wire 23 is wound around the winding core 21.
This is carried out in a space 24a formed between the inner circumferential surface 27a of the holding jig 25m and the outer circumferential surface 29 of the first layer wire 23.

Thereafter, when stacking the wire 23 is repeated, the wire 23 is wound one layer at a time while being sequentially replaced with a holding jig having an inner circumferential surface having a curvature suitable for each stacking stage.

As described above, when the wound wire 23 is multilayered, for example, as shown in FIG.
Since the outer periphery 29 of the wire 3 is uneven, a relatively large friction occurs between the wire 23 and the wire 23 about to be wound, which may cause damage to the insulation coating of the wire 23. To solve this problem, it is preferable to place an insulating sheet 30 on top of the already wound layer of wire 23, as shown in FIG.

In FIG. 4, the third layer wire 2 is
3 is shown in the middle of being wound. In FIG. 4, parts corresponding to those shown in FIG. 2 are given the same reference numerals, and redundant explanations will be omitted.

As shown in FIG. 4, when the insulating sheet 30 is used, the space 24b for one layer of the wire 23 to be wound around the winding core 21 is the inner peripheral surface of the insulating sheet 30 and the holding jig 25b. 2
7b.

Therefore, the presence of the insulating sheet 30 not only reduces damage to the insulation coating of the wire 23 but also
In addition to making the winding work of No. 3 smoother, the insulation provided by the insulating sheet 30 itself makes it possible to more completely insulate each part of the wire 23.

5 and 6 show a method of winding the four-pole saddle coil 31. Here, FIG. 5 shows a perspective view of the winding state, and FIG. 6 shows the line vt-- in FIG.
FIG. 6 is an end view of a cut portion taken along vt.

A saddle-shaped winding frame 32 whose longitudinal direction extends in an arc shape is prepared. This winding frame 32 has substantially the same shape as the winding frame 22 described above. On the inner peripheral side of the winding frame 32, the winding frame 3
A winding core 33 whose longitudinal direction extends in an arc shape is positioned at a position shifted by 45 degrees from directly above the winding core 2 . At this time, the winding core 3
3 and the longitudinal direction of the winding frame 32 are aligned with each other.

A plurality of presser jigs 34 are positioned with respect to the winding core 33 so as to face the winding frame 32. The presser jig 34 has substantially the same shape as the presser jig 25 and the like described above. That is, the presser jig 34 has an inner peripheral surface 3 extending in an arc shape.
5, and this inner peripheral surface 35 provides a space 37 for one layer of the wire 36 to be wound around the winding core 33. In this embodiment, an insulating sheet 38 similar to the insulating sheet 30 described above is used, and this space 37 is formed between the inner peripheral surface 35 and the insulating sheet 38. The holding jig 34 also forms a groove 39 into which the winding core 33 is received.

The work of winding the wire rod 36 around the winding core 33 is the same as in the embodiment described above.

The shapes of the winding frame, winding core, presser jig, etc. can be arbitrarily changed depending on the form of the coil to be obtained.

For example, in the embodiment shown in FIGS. 5 and 6, the winding work was performed by positioning the winding core 33 on the inner circumferential side from directly above the winding frame 32. The winding work may be performed by positioning the winding core on the outer circumferential side from directly above.

In addition, in all of the above-mentioned embodiments, the central angle is approximately 90
Although the winding frame and winding core are in the form of an arc of degrees, winding may be performed using an arc-shaped winding frame and winding core having a center angle of a different size.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a state in which a wire winding operation is being performed according to an embodiment of the present invention. FIG. 2 is an end view of a cut portion taken along the line ■-■ in FIG. 1. FIG. 3 is a diagram corresponding to FIG. 2, and shows a state in which the wire rod 23 is wound in multiple layers. FIG. 4 is a diagram corresponding to FIG. 2, and shows an embodiment in which an insulating sheet 30 is inserted between the layers of the wound wire 23. FIG. 5 is a perspective view showing a state in which a winding wire according to still another embodiment of the present invention is being implemented. FIG. 6 is an end view of a section taken along the line Vl--Vl in FIG. 5. FIG. FIG. 7 is a perspective view showing a state in which a conventional method for winding a linear saddle-shaped coil is being carried out. FIG. 8 is a diagram for explaining problems encountered in a method of winding a saddle-shaped coil whose longitudinal direction extends in an arc shape. In the figure, 20.31 is a saddle-shaped coil, 21°33 is a winding core, 22.32 is a winding frame, 23.36 is a wire rod, 24, 24
a, 24b, 37 are spaces for one layer, 25.25a, 25
b, 34 is a holding jig, and 30° 38 is an insulating sheet.

Claims (4)

[Claims] (1) A method for winding a saddle-shaped coil whose longitudinal direction extends in an arc shape, in which a winding core whose longitudinal direction extends in an arc shape is placed on a saddle-shaped winding frame whose longitudinal direction extends in an arc shape. The wire rods are positioned so that the directions are aligned, and a holding jig is placed so as to face the winding frame to form a space for one layer of the wire to be wound around the winding core. A method for winding a saddle-shaped coil, comprising steps of winding a coil around the winding core. (2) The saddle-shaped coil winding method according to claim 1, wherein a space for one layer of wire to be wound around the winding core is formed by the holding jig and the winding frame. . (3) The saddle-shaped coil according to claim 1, wherein a space for one layer of the wire to be wound around the winding core is formed by the holding jig and the already wound layer of the wire. winding method. (4) The method for winding a saddle-shaped coil according to claim 3, wherein an insulating sheet is placed on the already wound wire layer.