JP2862967B2 - Method and apparatus for manufacturing helical coil - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method and an apparatus for manufacturing a helical coil, and more particularly, to a high-precision winding of a coil provided for a superconducting helical coil for a fusion device, for example. TECHNICAL FIELD The present invention relates to a method and an apparatus for manufacturing a helical coil suitable for the present invention.

[Prior Art] As a conventional apparatus, there is known an apparatus for winding a pipe into a coil, such as a pipe bending mechanism described in Japanese Patent Publication No. 64-3579. That is, a coil is manufactured by continuously bending a strip with three rolls (a guide roller, a bending roller, and a following roller), and then moving the strip in the axial direction of the coil.

In this prior art, after the strip is bent, the strip is moved in the axial direction of the coil by its own weight.

The above-mentioned apparatus is composed of a strip pushing device, a three-roll bending method bending apparatus, a support thereof, and a rotary table on which the bent strip is placed.

First, the strip is fed by the pushing device, and the roll at the outlet of the strip is moved by the driving device to continuously bend the strip. The strips are stretched downward by their own weight after bending, and are sequentially stacked on a rotary table that is driven to rotate by a driving device to form a helical coil.

According to the above prior art, the strip can be bent in one direction in a plane perpendicular to the center axis of the coil, but for example, the center of curvature of the strip like a donut-shaped helical coil such as a superconducting helical coil for a fusion device is used. Does not always match the coil center axis, this method cannot cope.

[Problems to be Solved by the Invention] FIGS. 2 and 3 show a donut-shaped helical coil used in the present invention, for example, in the fusion device.

2A and 2B show an example of a donut-shaped helical coil. FIG. 2A is a plan view, FIG. 2B is a side view, and FIG. 3 is an enlarged sectional view of the coil.

In FIG. 2, reference numeral 1 denotes a wound coil, and 2 denotes a donut-shaped bobbin.

In FIG. 3, 3 is a conductor having a rectangular cross section, and 4 is
The side plates 5 welded to the winding frame 2 at the portions are upper plates wound around the conductor 3 and then welded to the side plates 4 at the portions. Coil 1
In this manner, the normal conductor 3 is configured to be wound tens to hundreds of times in the groove formed by the side plate 4 in a multiplex manner.

In the above-described coil 1, the winding frame 2 has a donut shape, and as a result, the curvature and the specific torsion angle (the torsion angle per unit length) of the conductor 1 are not uniform.

In the prior art described above, the curvature and the specific torsion angle of the conductor are always constant. In this case, only a cylindrical helical coil can be manufactured, and even if an attempt is made to manufacture a donut-shaped helical coil, it cannot be formed into a predetermined shape.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is possible to wind a coil around a bobbin while changing a curvature and a specific torsion angle of a conductor, and to change a curvature and a specific torsion angle depending on a position. It is an object of the present invention to provide a method and an apparatus for manufacturing a helical coil capable of forming different donut-shaped helical coils without applying tension.

Means for Solving the Problems In order to achieve the above object, a basic configuration of a method for manufacturing a helical coil according to the present invention is to manufacture a helical coil in which a conductor is spirally wound multiple times around a donut-shaped winding frame. In the method, the conductor is wound in advance on a bobbin, and the conductor supplied from the bobbin is rotated while the donut-shaped bobbin and the bobbin are relatively rotated so that the conductor supplied from the bobbin passes through the hollow portion of the donut-shaped bobbin. Is wound around the donut-shaped bobbin.

In order to achieve the above object, the most preferable configuration of the method for manufacturing a helical coil according to the present invention is the method for manufacturing a helical coil in which a conductor is spirally wound around a donut-shaped winding frame in a multiplex manner. A conductor is wound around a hollow bobbin passed through a frame, and the conductor is wound around the donut-shaped bobbin while supplying the conductor from the bobbin while rotating the donut-shaped bobbin.

More specifically, the conductor supplied from the bobbin is provided with a predetermined curvature and specific torsion angle, and the conductor is connected to the donut-shaped bobbin via a bending / torsion forming mechanism that rotates through the center of the donut-shaped bobbin. Is to be wound around.

Furthermore, in order to achieve the above object, the most preferred configuration of the helical coil manufacturing apparatus according to the present invention is a donut-shaped winding frame in which conductors are to be spirally wound in multiple layers, and a rotary table for rotating the donut-shaped winding frame. A hollow bobbin, which can be divided for passing through the donut-shaped bobbin and winds a conductor in advance, a driving means for rotating the support base and the bobbin of the bobbin, What supports the donut-shaped bobbin and interferes with the bobbin is provided with a plurality of bobbin supports that can be once separated from the bobbin and driving means therefor.

More specifically, in addition to the above, provided by bobbins,
A bending / torsion forming mechanism for giving a predetermined curvature and a specific torsion angle to the conductor sent out to the donut-shaped reel, and a dividable for passing through the donut-shaped reel, and holding the bending / torsion-forming mechanism so as to be able to go around. It comprises a supporting rotary frame and means for rotating the rotary frame portion of the supporting rotary frame.

[Operation] The operation of the above technical means will be described below.

The hollow bobbin is divided, the bobbin is set so that the bobbin can be rotated through the hollow space of the donut-shaped bobbin, and then the bobbin is integrated so as to sandwich the bobbin. Next, the conductor is wound around a bobbin to the end.

Fix the conductor end to the bobbin and rotate the rotary table,
In synchronization with this, the bobbin is also rotated to wind the conductor around the bobbin.

More preferably, the conductor supplied so as to be unreeled from the bobbin is bent and twisted through a bending and twisting mechanism, and then wound around a bobbin.

In general, in the case of a cylindrical helical coil, the helical coil can be easily wound by a conventional technique of rotating a winding core around a central axis of a cylinder and moving a position of a supply portion of a conductor in an axial direction.

However, in the case of the donut-shaped helical coil, it is indispensable that the supply portion of the conductor rotates through the center space of the donut-shaped bobbin instead of rotating the cylinder. Therefore, as described above, as described above, a method in which a hollow bobbin is passed through a donut-shaped bobbin, a conductor is wound on the bobbin to the end, and then the conductor is supplied while the bobbin rotates, and a method in which the bobbin itself is a donut. And revolving around the bobbin through the middle of the bobbin.

When the rigidity of the conductor is low, the helical coil can be manufactured by sequentially winding the conductor in the groove formed by the winding frame 2 and the side plate 4 shown in FIG. However, for example, when manufacturing a large donut-shaped helical coil using a super electric coil, this method cannot be used from the following points.

When a current flows through the superconducting coil, a strong electromagnetic force is applied to the conductor. When the rigidity of the conductor is low, the conductor moves due to this electromagnetic force, and frictional heat is generated between the conductors. The heat destroys the superconducting state and returns to normal conduction, a so-called quench phenomenon.

For this reason, especially when manufacturing a large-sized device, it is necessary to increase the size of the conductor.

If the rigidity of the conductor is large, the elastic recovery force is large, and in order to wind with high precision without gaps, it is necessary to bend the conductor to a slightly larger curvature, make it spring back to a predetermined curvature, and then wind it on a winding frame There is. In the case of a donut-shaped helical coil, the curvature and the specific torsion angle differ depending on the position of the coil. In particular, it has been difficult to manufacture a large-sized donut-shaped helical coil using a superconducting coil by the conventional technique.

According to the present invention, since the curvature and the torsion angle of the conductor can be arbitrarily changed, it is possible to manufacture even a donut-shaped helical coil in which the curvature and the torsion angle of the conductor are not constant.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 16.

FIG. 1 is a perspective view of a helical coil manufacturing apparatus according to one embodiment of the present invention, and FIG. 4 is a schematic configuration diagram showing a rotating mechanism of a bending / torsion forming mechanism. FIG. 5 (b) is a side view of a support table, FIG. 5 is a cross-sectional view showing an outline of a bending / torsion forming mechanism, and FIG. 6 is a sectional view of an inlet roll of FIG. FIG. 7 is a schematic configuration diagram of a center roll portion, FIG. 8 is a schematic configuration diagram of an outlet roll portion, and FIG. 9 shows a relationship between each roll portion and deformation of a conductor. It is a schematic diagram.

In FIG. 1, 2 is a donut-shaped bobbin, 3 is a conductor,
6 is a hollow bobbin, 7 is a support for the bobbin 6, 8 is a driving device for rotating the bobbin 6, 9 is a rotary table for rotating the bobbin 2, 10 is its driving device, and 11 is the driving device. A support stand on the turntable 9 for supporting the donut-shaped bobbin 2, 12 is a bending / torsion forming mechanism, 13 is the support stand, and 14 is a rotating frame portion of the support stand 13. It is a driving device.

The winding frame 2 has a U-shaped groove-shaped side plate 4 previously shown in FIG. 4 spirally attached and welded to its outer periphery, but is not shown in FIG. 1 to avoid complication. I have. Reel 2
After welding the side plate 4, use a crane or the like to
Placed on eleven.

Next, the bobbin 6 divided in advance in the dividing unit 15, the support 7 similarly divided in the dividing unit 16, and the support 13 of the bending / torsion forming mechanism divided in the dividing unit 17 were respectively divided. Parts 21, 22, 23,
The donut-shaped bobbin 2 is covered so as to be sandwiched between the donut-shaped bobbins 2, and connected and integrated by respective connecting members 18, 19, 20.

As a result, the bobbin 6 is supported by the support base 7, and is driven by a driving device 8 (not shown in detail) to rotate around the bobbin 2 in the direction of the arrow I in the drawing.

After this, the conductor 3 is horizontally aligned with the bobbin 6 and wound up to a predetermined length to the end. At this time,
From a supply bobbin (not shown) having the same diameter as the bobbin diameter, the conductor 3
Is transferred so as not to cause new plastic deformation, the operation of bending the conductor 3 to a required curvature can be omitted.

Next, the bobbin 6 is slightly rotated to draw out the conductor 3 from the bobbin 6.

Next, the end of the conductor 3 is passed through a bending / torsion forming mechanism 12, and the bending / torsion forming mechanism 12 is driven to form the conductor 3 into a predetermined curvature and a specific torsion angle. The rotating frame portion 13a of the support base 13 in the direction in which the conductor 3 is wound around the winding frame 2 (direction II in the figure) also in the twist forming mechanism 12 itself
(See FIG. 4 described later). After the conductor 3 is fixed to the winding frame 2 (in the groove formed by the side wall 4 on the winding frame 2) by a fixing tool (not shown), the turntable 9 is slightly rotated in the direction of arrow III to make the conductor 3 slack. I take the.

Next, the bobbin 6 is slightly rotated, and the same operation is repeated, so that the conductor 3 is wound around the bobbin 2 (the premises where the side walls 4 on the bobbin 2 are formed) without any gap.

With the rotation of the turntable 9, the support 11
Are the rotating frame 13a of the support 13 and the bobbin 6 on the support 7
When it comes to a position where it interferes with
It moves up and down in the direction of IV to avoid interference.

After winding the conductor 3, the upper plate 5 is welded and fixed to the side plate 4 as shown in FIG. 3 to complete the helical coil.

The above is a brief description of a method for manufacturing a helical coil and an apparatus therefor. Next, the configuration and operation of a bending / torsion forming mechanism will be described in more detail.

As shown in FIG. 4, the support 13 of the bending / torsion forming mechanism 12 is provided with a rotating frame portion 13a for rotating the bending / torsion forming mechanism 12, and via a guide 13b.
Is installed.

The driving device 14 for rotating the rotating frame portion 13a includes the driving motor 1
4a, a pinion 14b provided on the axis thereof, and a circumferential gear 14C integrally provided on the side of the rotating frame 13a.

When the drive motor 14a rotates, the rotational force is applied to the pinion 1
4b, transmitted by the engagement of the gear 14c, and the rotating frame portion 13a
Pivots to rotate the bending and twisting mechanism 12 in the II direction shown in FIG.

Next, in FIG. 5, 24 is an inlet roll, 25 is a center roll, and 26 is an outlet roll. 27 is the entrance roll
A driving device for rotating 24, a driving device 28 for moving the position of the central roll 25 in the y direction in the figure, and a driving device 29 for moving the outlet roll portion in the x direction This is a driving device for rotating about the center axis. 3 '
Indicates a conductor after bending and twisting. Reference numeral 31 denotes a sliding surface between the central roll and the outlet roll. The relative positions of the inlet roll and the center roll are fixed so as not to move.

First, the end of the conductor 3 is engaged with the entrance roll 24 and the driving device 28 is driven to feed the conductor to the center roll 25 and the exit roll 26. The center roll portion and the exit roll portion are moved relative to each other in the y direction by the driving device 28, and as a result, the conductor is bent. Further, the conductor is twisted by rotating the outlet roll portion by the driving device 29. As a result,
The conductor 3 is subjected to a combined bending and torsion process, and is formed into a predetermined curvature and a specific torsion angle.

 Next, each roll portion is shown in FIGS.

The pair of inlet rolls 24 shown in FIG. 6 are rotated by the driving device 27 and feed the conductor 3 after biting the conductor 3.

The positioning of the pair of center rolls 25 shown in FIG. The central roll and the inlet roll are integrated and feed the conductor 3 at the same level.

A pair of outlet rolls 26 shown in FIG.
24, the position in the y direction is different from that of the center roll 25, and the conductor 3 is bent and twisted before being sent out.

In FIG. 8, reference numeral 29 denotes a driving device for rotating the outlet roll in the Θ direction, and reference numeral 30 denotes a worm gear connected to the device, which transmits the rotational force of the driving device to the roll. is there.

Next, a method of calculating the positioning amount y and the rotation angle Θ for shaping the conductor to a predetermined curvature and a specific torsion angle will be described with reference to FIG.

In FIG. 9, 1 denotes a center roll 25 and an exit roll 26.
The distance between the axes, δy, is the center roll 25 (center roll)
And the output roll 26 (exit roll) in the y direction.

In the case of such a positional relationship, the radius of curvature ρ of the processed conductor 3 ′ becomes the following equation unless springback is considered.

Therefore, the curvature 1 / ρ is as follows.

The specific torsion angle θ is obtained by the following equation since the torsion angle becomes substantially で は at a distance of 1.

θ = Θ / l (3) In this embodiment, 1 is 60 mm, δy is 3 mm, and Θ is 10 °
Then, the curvature 1 / ρ and the specific torsion angle θ are as follows.

1 / ρ = 0.00166 mm ⁻¹ θ = 0.167 ⁰ / mm Next, examples of the radius of curvature and the specific torsion angle of each part of the coil will be described with reference to FIGS. 10 to 12.

FIG. 10 is an explanatory diagram of the shape of a donut-shaped helical coil, FIG. 11 is a distribution diagram of a radius of curvature, and FIG. 12 is a distribution diagram of a specific torsion angle.

As shown in FIG. 10, for example, a large radius of the donut-shaped winding frame (distance between the small circle center O ₂ of the donut center O ₁ and the winding frame section)
R ₀ , the distance from the donut center O ₁ of the point on the coil to R, the angle of the donut in the horizontal plane (the angle in the large radius direction) to φ, the radius of the small circle of the bobbin section to r, the angle in this section ( (Small radial direction angle) is φ.

Now, consider a helical coil wound around a donut-shaped curved surface for m turns.

 The equation representing the curve of this coil is as follows.

φ = mφ (4) R = R ₀ + rcosψ (5) Relationship between radius of curvature ρ and specific torsion angle θ obtained by numerical calculation using equations (4) and (5) and angle 小 in the small radius direction The
This is shown in FIGS. 11 and 12.

The calculation conditions are R = 4000 mm, r = 1000 mm, and m = 5.

As shown in FIGS. 11 and 12, since the radius of curvature ρ and the specific torsion angle θ differ depending on the position of the coil, it is necessary to form a conductor having a combined bending and torsion as in this embodiment.

In particular, when manufacturing a donut-shaped helical coil using a large-sized conductor having high rigidity, the above-described combined bending and torsion processing is indispensable.

Strictly speaking, the radius of curvature ρ shown in FIG. 11 indicates the radius of curvature at a certain point of the three-dimensional curve, and the curvature 1 / ρ is the sum of the in-plane and out-of-plane curvatures of a rectangular cross-section conductor. Indicates the value that was given. However, when the number m of turns is large and the curvature in the in-plane direction (large radius direction) is sufficiently smaller than the curvature in the out-of-plane direction (small radius direction) as in this embodiment, the combined curvature is changed to the out-of-plane direction. Even if the conductor is processed while ignoring the curvature in the in-plane direction, a coil having a sufficiently close shape can be formed.

Further, by using the average value of the radius of curvature ρ shown in FIG. 11 and setting the radius of curvature of the bobbin to that value, it is possible to obtain a substantially predetermined shape simply by performing torsional forming without newly bending the conductor. can do.

According to the present embodiment, the coil can be wound while changing the curvature and the specific torsion angle of the conductor, so that a donut-shaped helical coil having a different curvature and specific torsion angle depending on the position can be formed without applying tension. Can be.

In particular, according to the present embodiment, for example, a helical coil for a nuclear fusion device using a large-sized conductor can be formed with high precision.

Next, a second embodiment will be described with reference to FIG. 13 and FIG.

FIG. 13 is a side view showing the shape of a pair of grooved rolls,
FIG. 14 is a side view showing the shape of a pair of stepped rolls.

In general, if the roll diameter is small relative to the conductor cross section, the contact surface pressure will be high, causing dents on the conductor, and local deformation of the conductor corner during torsion processing. There is.

In order to prevent this, in the second embodiment, a grooved roll or a stepped roll was used. FIGS. 13 and 14 show a pair of rolls sandwiching the conductor.

In these examples, a conductor 3A having a square cross section with a side of 10 mm was used. The dimensions of the grooved roll in FIG. 13 were as follows: diameter D = 50 mm, width h = 14 mm, groove angle α = 45 °. is there. Moreover, various dimensions of the stepped roll in FIG. 14, the roll larger diameter D ₁
= 50 mm, diameter D ₂ = 30 mm, the large diameter portion width h ₂ = 8 mm, the small diameter portion width H ₁
= 18 mm.

By using the above-mentioned grooved roll and stepped roll, it is possible to prevent a local deformation of an indentation and an angle of the conductor and obtain a good surface condition.

Further, according to this embodiment, for example, in FIG. 14, the brim portions 24A, 25A and 26A of the roll can bear the bending reaction force in the Z direction of the conductor at the entrance, center and exit rolls, respectively.

As a result, the conductor can be bent in a plane perpendicular to the y-axis in FIG. 14 by defining the relative displacement in the Z direction of the central roll portion and the exit roll portion.

Furthermore, by simultaneously changing the y-direction displacement of the center roll and the exit roll, and rotating the exit roll about the longitudinal direction of the conductor as the central axis, it is possible to perform composite processing of out-of-plane, in-plane bending and torsion of the conductor. Becomes

The same effect can be obtained by arranging the four rolls so as to be in contact with the four surfaces of the rectangular conductor.

Next, a third embodiment will be described with reference to FIG.

FIG. 15 is a longitudinal sectional view showing a state where a conductor is wound around a bobbin used in a helical coil manufacturing apparatus according to another embodiment of the present invention.

In the embodiment of FIG. 1, when the conductor 3 is wound around the bobbin 6, the conductor 3 is wound outside the bobbin 6. In this case, the radius of curvature of the conductor 3 at the time of winding cannot be smaller than the outer diameter of the bobbin 6. When manufacturing the coil, it is desirable to keep the initial curvature of the conductor close to the curvature of the coil in order to reduce the amount of movement of the roll of the bending / torsion forming mechanism 12.

Therefore, in the third embodiment, as shown in FIG.
Was wound around the inside of the bobbin 6A. in this case,
When the initial radius of curvature of the conductor is slightly larger than the bobbin inner diameter, the conductor is fixed inside the bobbin by the elastic recovery force of the conductor itself.

By doing so, the initial radius of curvature of the conductor can be made smaller than when the conductor is wound around the outside of the bobbin, and the curvature can be made closer to the curvature of the coil.

As a result, the amount of movement of the roll of the bending and twisting mechanism can be reduced, and the bending and twisting mechanism can be manufactured compactly.
In addition, this eliminates the need for a fixture for keeping the conductor on the bobbin, and also eliminates the work of releasing the fixture for extending the conductor from the bobbin.

Next, a fourth embodiment will be described with reference to FIG.

FIG. 16 is a schematic perspective view of an apparatus for manufacturing a helical coil according to still another embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 1 are the same or equivalent parts, and thus the description thereof is omitted.

In FIG. 16, reference numeral 32 denotes a bobbin around which the conductor 3 has been wound, and the outer diameter of the bobbin 32 is smaller than the inner diameter of the hollow portion of the donut-shaped bobbin 2. 33, bobbin 32,
A hollow disk mounted and rotated on the circumference thereof, 34 is a support base for supporting the bobbin 32 and the hollow disk 33, 35 is a driving device for rotating the hollow disk 33, 36 is a driving force transmission. It is a chain. Although not shown in detail, the driving device 35 is composed of a driving motor and a small-diameter sprocket wheel provided on the axis thereof, the hollow disk 33 is provided with a circumferential sprocket wheel, and the chain 36 is It goes without saying that these sprocket wheels are engaged. Also,
The bobbin 33 has a driving device (not shown) inside and can rotate.

To explain the operation, first, the hollow disk 33 to which the bobbin 32 is connected is rotated in the direction of arrow P by the driving device 35 via the chain 36. Bobbin 32 corresponding to the rotation angle of hollow disk 33
Is rotated in the direction of arrow Q, so that the conductor 3
Wrap. By rotating the rotating table 9 at this time, the conductor 3 can be wound around the winding frame 2 in a helical shape.

According to the embodiment shown in FIG. 16, the same effect as the previous embodiment can be expected. In addition, the conductor can be wound around the bobbin 32 in advance and then attached to the hollow disk 34, so that the work can be performed efficiently. This embodiment has an advantage unique to this embodiment.

It is also possible to add a bending / torsion forming mechanism to the apparatus shown in FIG.

On the other hand, the device in which the bending and twisting mechanism is omitted in the embodiment shown in FIG. 1 is also useful as a device expected to have a corresponding effect.

Furthermore, in each of the above embodiments, an example in which the donut-shaped bobbin is rotated by the rotary table has been described. However, the present invention is not limited to this, and the bobbin does not rotate and the bobbin moves along the bobbin. It is also possible to configure.

[Effects of the Invention] As described in detail above, according to the present invention, a coil can be wound around a bobbin while changing the curvature and the specific torsion angle of the conductor, and the curvature and the specific torsion angle differ depending on the position. A method and apparatus for manufacturing a helical coil capable of forming a donut-shaped helical coil without applying tension can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for manufacturing a helical coil according to an embodiment of the present invention, FIG. 2 is a view showing an example of a donut-shaped helical coil, FIG. 3 is an enlarged sectional view of the coil, FIG. 4 is a schematic structural view showing a rotating mechanism of the bending / torsion forming mechanism, FIG. 5 is a sectional view showing an outline of the bending / torsion forming mechanism, and FIG. FIG. 7 is a schematic configuration diagram of a central roll portion, and FIG.
FIG. 9 is a schematic diagram showing the relationship between each roll portion and the deformation of the conductor, FIG. 10 is an explanatory diagram of the shape of a donut-shaped helical coil, and FIG. Radius distribution map, FIG. 12 is specific twist angle distribution map, FIG. 13 is a side view showing the shape of a pair of grooved rolls, FIG. 14 is a side view showing the shape of a pair of stepped rolls FIG. 15 is a longitudinal sectional view showing a state where a conductor is wound around a bobbin used in a device for manufacturing a helical coil according to another embodiment of the present invention.
FIG. 16 is a schematic perspective view of a helical coil manufacturing apparatus according to still another embodiment of the present invention. 1 ... coil, 5 ... winding frame, 3, 3A ... conductor, 6, 6A ... bobbin, 7
... Supports, 8,10,14 ... Drivers, 9 ... Rotating tables, 11,
13 ... Support base, 12 ... Bending and twisting forming mechanism, 13a ... Rotating frame part, 15,16,17 ... Division part, 24 ... Entry roll, 25 ... Center roll, 26 ... Outlet roll, 27,28,29 ... Drive Device, 32: bobbin, 33: hollow disk, 35: drive device.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinobu Watanabe 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Inside Hitachi, Ltd. Hitachi Plant (72) Inventor Shohei Suzuki 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd. Hitachi Plant (58) Field surveyed (Int. Cl. ⁶ , DB name) B21F 3/02 B21F 3/04 B21F 3/10

Claims (12)

(57) [Claims] 1. A method of manufacturing a helical coil in which a conductor is spirally wound multiple times around a donut-shaped bobbin, wherein the conductor is wound on a bobbin in advance, and a conductor supplied from the bobbin is used to cover a hollow portion of the donut-shaped bobbin. A method for manufacturing a helical coil, comprising winding the conductor around the donut-shaped bobbin while relatively rotating the donut-shaped bobbin and the bobbin so as to pass therethrough. 2. A method for manufacturing a helical coil in which a conductor is spirally wound multiple times around a donut-shaped bobbin, wherein the conductor is wound on a hollow bobbin passed through the donut-shaped bobbin, and the donut-shaped bobbin is rotated. And simultaneously winding the conductor around the donut-shaped bobbin while supplying the conductor from the bobbin. 3. A method for manufacturing a helical coil in which a conductor is spirally wound multiple times around a donut-shaped bobbin, wherein the conductor is wound around a bobbin smaller than the inner diameter of the hollow portion of the donut-shaped bobbin. Rotating the bobbin and supplying the conductor at the same time as rotating the bobbin so as to revolve the bobbin so as to pass through the hollow portion of the donut-shaped bobbin, thereby winding the conductor around the donut-shaped bobbin. A method for manufacturing a helical coil. 4. A donut-shaped winding is provided to a conductor supplied from a bobbin through a bending / torsion forming mechanism which gives a predetermined curvature and a specific torsion angle and rotates through the center of the donut-shaped winding frame. The method for manufacturing a helical coil according to claim 1, wherein the helical coil is wound around a frame. 5. The method according to claim 2, wherein the radius of the bobbin is an average radius of curvature of the coil. 6. The method for manufacturing a helical coil according to claim 1, wherein an initial curvature of the conductor when winding the conductor around the bobbin is close to a curvature of the bobbin. 7. The method for manufacturing a helical coil according to claim 2, wherein the conductor is wound around the inner surface of the bobbin. 8. A donut-shaped bobbin on which a conductor is to be spirally wound in multiple layers, a rotating table for rotating the donut-shaped bobbin, and a driving means therefor; and a splittable for passing through the donut-shaped bobbin; A hollow bobbin that winds up a conductor in advance, a drive unit that rotates the bobbin support base and the bobbin, and a device that is on the rotary table, supports the donut-shaped bobbin, and is located at a position that interferes with the bobbin. An apparatus for manufacturing a helical coil, comprising: a plurality of bobbin supports that can be once separated from a bobbin; and driving means therefor. 9. A donut-shaped bobbin on which a conductor is to be spirally wound in multiple layers, a rotary table for rotating the donut-shaped bobbin and a driving means therefor, and a bobbin smaller than the inner diameter of the hollow portion of the donut-shaped bobbin. The bobbin is guided so as to revolve through the hollow portion of the donut-shaped bobbin, and the bobbin can be divided so as to pass through the donut-shaped bobbin, and a support base for the hollow disc and The drive means, a plurality of reel support members that support the donut-shaped reel on the rotary table and are located at a position that interferes with the bobbin can be once separated from the reel, and a driving means therefor. An apparatus for manufacturing a helical coil, comprising: 10. A bending / torsion forming mechanism for providing a predetermined curvature and a specific torsion angle to a conductor provided from a bobbin and fed to a donut-shaped bobbin, and a dividable and twistable for passing through a donut-shaped bobbin. The helical coil according to any one of claims 8 and 9, further comprising: a supporting rotary frame that holds the torsional forming mechanism so as to be able to rotate; and means for rotating the rotary frame portion of the supporting rotary frame. Manufacturing equipment. 11. A bending / twist forming mechanism includes a plurality of rolls for transferring a conductor so as to sandwich the conductor from both sides, means for adjusting the relative positions of these rolls, and driving means for these rolls. 11. The helical coil manufacturing apparatus according to claim 10, wherein: 12. The helical coil manufacturing apparatus according to claim 11, wherein the plurality of rolls of the bending / torsion forming mechanism use either a stepped roll or a grooved roll.