JPS6057306B2 - coil manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil manufacturing apparatus for forming an annular coil, which has been wound a required number of times in advance, into a predetermined shape.

For example, when forming a toroidal coil 1 as shown in FIG. 1A to obtain a zigzag coil 2 as shown in FIG. 1B, the methods shown in FIGS. 2 and 3 are generally used. It was carried out in

That is, an upper plate 3 and a lower plate 5 are arranged at a predetermined interval by a spacer 4, and a molded plate 6 is arranged at a predetermined interval around the outer periphery of this plate unit 11, and the molded plate 6 is arranged between the upper plate 3 and the lower plate. It is configured such that it can slide through the gap formed by the spacers 4 of No. 5 toward the center of the spacers 4. The annular coil 1, which has been previously wound using another winding method, is arranged in the above-mentioned gap, and the side surface of the annular coil 1 is pressed by the molding plate 6, so that the outer shape of the spacer 4 is similar to that of the spacer 4. A zigzag shaped coil 2 is obtained. Here, the annular coil 1 is made of an insulated wire coated with an adhesive on its surface, and is fused and cured by heating or a solvent to maintain its shape after winding. Furthermore, the contact surfaces between the upper plate 3, lower plate 5, spacer 4 and the coil, and the coil contact surface at the tip of the molded plate 6 are all plated with hard chrome and given a mirror finish, making the coil as slippery as possible. Needless to say, care has been taken not to have any adverse effects on the coil surface. The conventional example described above had the following problems.

That is, in the process of molding the annular coil 1, the coil moves in contact with the upper plate 3 and the lower plate 5, so that frictional resistance naturally occurs at the contact portion. The magnitude of this full friction resistance is influenced by many factors, such as the surface roughness of the upper plate 3 and lower plate 5, the surface condition of the coil, the forming speed, and the dimensional relationship between the gap and the thickness of the annular coil 1, so it cannot be strictly determined. In other words, it cannot always be molded under exactly the same conditions. Therefore, a phenomenon as shown in FIG. 4 may occur. In other words, when the forming plate 6 is at a certain position during the forming process, if the position where the outer circumference of the annular coil 1 is uniformly formed is represented by the dashed line 9, then as mentioned above, the area a where the frictional resistance is large is delayed by L from the normal position. However, since the total length remains unchanged, the length increases by 1 in the portion b where the slip friction resistance is relatively small. If the forming plate 6 is further advanced in such an uneven state, a phenomenon as shown in FIG. 5 occurs. In other words, b
Since the portion is advanced from the normal position, it contacts the spacer 4 first. However, the molded plate 6 also has an arrow 10
In order to advance in the direction, the annular coil 1 is
tries to move in the direction of arrow 7. However, the curvature R of the annular coil 1 formed by the forming plate 6 becomes smaller depending on the forming plate 6, so that the annular coil 1 becomes increasingly difficult to move in the direction of the arrow 7. Therefore, the zigzag-shaped coil 2 formed in such a state tends to have an uneven outer shape, and is even more difficult to form! There were problems with the quality of the coils, such as increased pinholes and scratches. The present invention solves the above problems and provides a coil manufacturing apparatus that can stably supply high quality and uniform coils.

Embodiments of the present invention will be described below with reference to FIG. 6 and the following drawings. In FIG. 6, a conventional board unit 11 and
Further, a pressing plate 8 is arranged between each molding plate 6.

Furthermore, when the forming plate 6 moves toward the center of the spacer 4, the pushing plate 8 is configured to move toward the center of the spacer 4 in a predetermined relationship with the forming plate 6 in the same manner as the forming plate 6.
As shown in FIG. 8, the tip shape is the molded plate 6
When the coil moves to the final molding position, it is configured to form the same outer shape as the coil. Note that the mechanism for interlocking the molding plate 6 and the pushing plate 8 in a predetermined movement relationship can be easily constructed by a conventional mechanism such as a cam, so its details are omitted. In addition, the forming plate 6 and the pressing plate 8
As shown in FIG. 8, the shape of the tip of the coil must match the outer shape of the coil to be finally formed and finished. Even if there is a delay in the movement of the coil due to the above-mentioned sliding friction resistance during forming, the pushing plate 8 will move in accordance with the forming plate 6 and will always push the delayed part of the coil, so that the forming process will be delayed. The shape of the coil is always kept uniform.

In other words, the coil is always formed in a uniform state, so there is no stress on the coil itself, and by pressing the outer shape of the coil with the tip of the pressing plate 8, a uniform and high quality coil is formed. can be obtained. Incidentally, in the present invention, the forming plate 6 and the pushing plate 8 may move in a relationship as shown in FIG.

In FIG. 7, the distance from the center 0 of the spacer 4 to the tip of the forming plate 6 is P1, and the distance to the tip of the pushing plate 8 is x, and when the annular coil 1 is formed by the forming plate 6, the annular coil 1 is a graph showing the positional relationship of the outer periphery of the coil assuming that the coil is molded completely uniformly without expansion or contraction at any position. That is, the position from the center 0 of the spacer 4 before forming the annular coil 1 is P. , xO,
The molded plate 6 is P. When the annular coil 1 moves toward the center 0 by P1, that is, ΔP1, from XO, the annular coil 1 expands by X1, that is, ΔX1 from XO. Furthermore, when the forming plate 6 moves from P1 to P2, that is, ΔP2, the annular coil 1 moves from X1 to X2'', that is, Δ?.In other words, the annular coil 1 expands once in the initial process of forming, and then moves toward the center 0. In another embodiment of the present invention shown in Fig. 8, the pushing plate 8 is configured to move in exactly the same manner as the annular coil 1.As is clear from the above description, according to the present invention, When a circular coil is ideally formed, the forming plate and the pressing plate move according to the outer circumferential position of the circular coil during each forming process, so that no force is applied to the coil itself; ,
Since the tip shapes of the forming plate and the pressing plate form the final outer shape of the coil, it is possible to obtain a high-quality coil that is uniform and free from pinholes and scratches.

[Brief explanation of the drawing]

FIGS. 1A and 1B are diagrams for explaining an example of coil molding, FIGS. 2 and 3 are a top view and a side view of the main parts of the conventional example,
4 and 5 are diagrams for explaining the problems of the conventional example, FIG. 6 is a top view of essential parts of an embodiment of the present invention, and FIG. 7 is a diagram for explaining its operation. FIG. 8 is a top view of main parts of another embodiment of the present invention. 1... Annular coil, 2... Zigzag coil, 3...
... Upper board, 4... Spacer, 5... Lower board, 6...
Forming plate, 8...Pushing plate.

Claims (1)

[Claims] 1. A plurality of discs are arranged at a predetermined interval with spacers having an outer diameter equal to the inner diameter of the finished coil in between, and a required number of turns are placed in the space formed by the spacers on the outer periphery of the disc. A plurality of forming plate groups and a pushing plate group are provided with a rotated annular coil, and are located at a predetermined position near the outer periphery of the board, and move reciprocally in conjunction with each other in the space toward the center of the board. and when the forming plate group and the pushing plate group move back and forth, the coil is formed by pressing the outer circumferential side of the annular coil to narrow the annular coil between the spacer and the spacer. A coil manufacturing device featuring: 2. The coil manufacturing apparatus as set forth in claim 1, wherein the ends of the forming plate and the pushing plate have substantially the same external shape as the finished coil. 3. The coil manufacturing apparatus according to claim 1, wherein the forming plates and the pressing plates are arranged alternately. 4. In the statement of claim 3, the length connecting the mutually adjacent forming plates and the portion where the tip of the pushing plate contacts the side surface of the outer periphery of the annular coil is always constant during any forming process. A coil manufacturing apparatus characterized in that the forming plate and the pushing plate are interlocked so that