JPH0638375B2 - Winding method and apparatus for wound core for transformer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a winding method and a winding device for a wound iron core mainly used in a transformer or the like.

(Prior Art) Conventionally, non-oriented silicon steel sheets and oriented silicon steel sheets have been used as iron core materials for transformers, but in recent years, amorphous magnetic ribbons, which are completely different from these materials, have attracted attention. Has been done. Since this amorphous magnetic ribbon has excellent magnetic properties as an iron core material and particularly has a small iron loss, various studies have been conducted for use in winding cores of distribution transformers and instrument transformers. Has been.

(Problems to be Solved by the Invention) It is very difficult to manufacture the amorphous magnetic ribbon with a thickness equal to that of the silicon steel sheet due to the manufacturing method thereof. About one-half, specifically 0.02-0.03
Only those with a thickness of about mm are manufactured, and moreover, they are extremely hard and extremely brittle compared to silicon steel sheets.

Therefore, even if an attempt is made to obtain a wound iron core by winding the amorphous magnetic ribbon into a winding form while applying tension to the amorphous magnetic ribbon by the conventional technique of winding a silicon steel sheet, the amorphous magnetic ribbon is broken during the winding. It becomes difficult to wind by winding or winding.

Therefore, when winding the amorphous magnetic ribbon, it is necessary to wind the amorphous magnetic ribbon at a relatively slow winding speed while suppressing the tension within a range where the amorphous magnetic ribbon is not broken. Since the band is very thin, it has a drawback that it takes a considerable amount of time to wind it to a predetermined winding thickness.

In order to eliminate these drawbacks, the winding time can be shortened by stacking and winding a plurality of amorphous magnetic ribbons (for example, about 5 to 10). However, as mentioned above, the amorphous magnetic ribbon is very thin and has a weak rigidity, and the thickness of the plate in the width direction varies due to the manufacturing method. Since it is not possible to straightly feed multiple ribbons at a uniform speed and the tension applied to the amorphous magnetic ribbon tends to be applied to the thicker plate in the width direction, the end faces of the wound iron core should be aligned. It was difficult to wind.

That is, since the amorphous magnetic ribbon is wound in a state where the laminated end faces of the winding iron core are not aligned, when the coil is wound around such a winding iron core, the coil inevitably becomes large. Since it takes time and effort to manufacture a transformer, the manufacturing cost rises, and the end faces of the winding layers of the iron core are not uniform, the core pieces protruding from the end face vibrate during operation of the transformer and become a source of noise. There was a risk of becoming.

(Means for Solving Problems and Actions Thereof) The present invention addresses the above problems and uses an amorphous magnetic ribbon which is very difficult to handle as an iron core material, though it has excellent magnetic properties. A winding method and a winding device for a wound core of a transformer, which can be manufactured rationally and economically without damaging the characteristics, are provided. ) A feeding step of once polymerizing a plurality of amorphous magnetic ribbons respectively drawn from each winding shaft and then drawing out at a predetermined feeding speed by a feeding device, and (b) a plurality of the polymerized amorphous strips. After separating the thin magnetic ribbons into single sheets again, using the transport / alignment device,
A conveyance / alignment step of conveying each amorphous magnetic ribbon while applying a predetermined back tension, and aligning the side edges of each amorphous magnetic ribbon with each other using a drum-shaped roller; c) a winding step of winding the amorphous magnetic ribbons aligned with each other around the core by a winding device while polymerizing again, and (d) the feeding speed of the amorphous magnetic ribbons by the control device. And a step of matching the conveying speed with the peripheral speed of the winding peripheral surface of the amorphous magnetic ribbon.

(Example) An example of the present invention will be described with reference to the accompanying drawings.
Is a plurality of drums rotatably supported by the frame (2), and each of the drums (1) has an amorphous magnetic ribbon (T).
[Hereinafter, simply referred to as a ribbon] is wound. (Four)
Is a device for feeding the thin strip (T), and the thin strip (T) is sandwiched between the feeding roller (5) and the pressing roller (6) and is driven by the feeding motor (7). ) Is sent out. Reference numeral (8) is an air cylinder connected to the pressure roller (6), and the air cylinder (8) moves the pressure roller (6) up and down. (9) is a thin (T) guide plate.
(10) is a detection device for detecting the feeding state of the thin strip (T), and four sets of light projection tubes (a), (a '), and
(c), (e) and the light receiving tube (b), (b '), (d), (f) are provided, the light emitting tube (a), (a') and the light receiving tube (b), While there are multiple ribbons (T) between (b ′) and (b ′), feeding is continued, and the uppermost ribbon is above the line connecting the emitter tube (c) and the receiver tube (d). Or the thin ribbon (T) at the bottom is the emitter tube (e) and the receiver tube.
When it goes below the line connecting (f), this is detected and the rotation of the feed motor (7) is stopped by a command signal from a control device (70) separately installed. (11) is a back tension device, the structure of which will be described with reference to FIGS. (12) is a lower pedestal to which a cushioning material (g) such as hard rubber is pasted, and this pedestal (12) is a metal fitting attached to a wall (14) which is erected on the base (13). It is attached to (15) via a collar (16), and on the upper side of the pedestal (12) is a cushioning material (h).
There is a pressing plate (17) on which is attached.
The support shafts (18) attached to both ends of (7) are passed through the bearing fittings (20) fixed to the support plate (19), and the upper end of this support shaft (18) and the top of the bearing fittings (20) are By inserting a compression spring (21) between them, the pressing plate (17) is supported by the support plate (19) with the contact pressure between the cushioning materials (b) and (g) set to about 0.2 to 0.5 kg. ) Is attached so that it can move up and down. Then, the pressing plate (1
The support plate (19) provided with (7) is provided with a dovetail groove (2
It can be attached to and removed from 2) freely. (23) is an operating handle. When holding the ribbon (T), operate the cylinder (24) to push up the piston rod (25) and move the pressing plate (17) to the compression spring (2
Push up against 1) and pass a thin strip (T) with a gap between the cushioning materials (g) and (h). After passing the ribbon (T),
5) Lower. At this time, do not push the pressing plate (17).
Therefore, the pressing plate (17), due to its own weight, the cushioning material (h),
Compression spring (21) so that the contact pressure between (g) does not exceed 0.5 kg
The thin strip (T) is cushioned while being urged upward against the force of
It is to be held between (h) and (g). The reason for providing the support plate (19) so that it can be inserted and removed freely is that if the cushioning materials (g) and (h) wear due to the use of thin strips (T) of different widths and the pressing force becomes insufficient, g), (h) can be easily replaced, and thin strip (T)
By using a support plate having a cushioning material (h) according to the width dimension of the thin strip (T) with a different degree of wear, the degree of wear of the cushioning material (h) is reduced. ) Is always pressed with the same pressing force. Reference numeral (26) is a guide fitting, the structure of which will be described with reference to FIGS. (27) is a support for the thin strip (T), and two elongated holes (28) are formed at right angles to the traveling direction of the thin strip (T). A holding plate with the tool (29) inserted and the rotation stopper (29) attached.
Position (30) below the pedestal (27), and use the detent (29)
The bolt (31) screwed onto the guide plate (32) is passed through the guide plate (32), and the tightening handle (33) attached to the protruding end of the bolt (31) is tightened to open the guide plate (32) in the long hole ( It is fixed to the support base (27) so as to be movable within the range of 28) according to the width dimension of the ribbon (T). The support table (27) is attached to the wall body (14). (34) is a braking roller made of hard rubber, a normal metal roller (35) is provided above the braking roller (34), and a thin strip (T) is provided between the braking roller (34) and the braking roller (34). Each of them is attached to the wall body (14) with a gap so that it can pass through. The braking roller (34) is connected to a braking device (36) such as an electromagnetic brake via a belt (37), and the thin belt (T) forms an S-shape between the braking roller (34) and the roller (35). When the belt is wound around and moved, the braking roller (34) is braked by the braking device (36) to rotate, so that the ribbon (T) moves in a state where the conveyance speed is suppressed. It will be. Therefore, the thin strip (T) can be wound by the back tension device (11) and the braking roller (34) with a tension that does not cause slack when winding when winding the wound iron core. Become. A braking device (36) is connected to each braking roller (34) one by one. Reference numeral (38) denotes a second guide metal member, and the structure thereof is the same as that of the first guide metal member (26), and thus the description thereof will be omitted. (3
9) is a large drum-shaped roller provided at the tip of the second guide metal fitting (38), the diameter of the central part of which is slightly larger than the diameter of both ends and is formed in a middle height, and the inclination angle is about 0.5 to 1. It is a range of degrees. (40) is a device for winding the thin ribbon (T) conveyed by applying the tension around a winding iron core (circular or rectangular shape) via a roller (41), and a motor (42)
A speed reducer (43), a winding shaft (44), and a winding core (45) detachably attached to the winding shaft (44). Further, the guide rollers (50), (51) and (52) have thin strips as shown in FIG.
A guide ring (53) is movably provided according to the width dimension of (T). On the outer peripheral surface of the guide rollers (50), (51), (52), concave grooves (54) are provided at regular intervals in the axial direction,
The guide ring (53) is fitted with a ball (56), which is constantly biased by a spring (55), into the groove (54).
(53) is supported by guide rollers (50), (51), (52), respectively. Further, the support plate (19) of the back tension device (11) is also detachably attached to the dovetail groove (22) of the support fitting (15) by the same fixing method as the guide ring (53), so that the drum-shaped roller ( A detection piece (60) is attached to one end of the (39), and a detection sensor (61) including a proximity switch or the like is attached at a position corresponding to the detection piece (60).

Next, the operating state of this embodiment will be described.

First, a thin strip (T) fed from a plurality of drums (1) supported by a frame (2) is fed in a superposed state at a constant speed by a feeding device (4), and this feeding state is detected by a detecting device ( 10) and the control device (70), the tension is not applied to the ribbon (T) during this period.

Each strip (T) delivered at a constant delivery speed is divided into two parts by the guide roller (51) and one by the guide roller (52).
The thin strips (T), which are divided into sheets one by one and held by the back tension device (11) respectively, are divided into the back tension device (11), the guide fitting (26), the braking roller (34),
The guide fitting (38), the drum-shaped roller (39) and the roller (41) are conveyed in this order and wound around the winding core (45). Ribbon
The thing to be careful about when winding (T) is the ribbon
The tension applied to (T) sets the braking force of the back tension device (11) and the braking roller (34) to such an extent that the winding iron core can be wound at a constant space factor, and the feeding motor (7)
It is necessary to make the conveyance speed and the delivery speed of the ribbon (T) from the back tension device (11) to the roller (41) the same by making the rotation ratio of the roller and the rotation ratio of the roller (41) the same. For this purpose, the number of rotations of the roller (41) is detected, and when the number of rotations of the roller (41) is slower than the number of rotations of the feeding motor (7), the difference is controlled by the control device (70). The command signal based on the calculation result is sent from the control device (70) to the reel drive motor (42), and the motor (42) is decelerated and wound on the core (45). The peripheral speed of the winding peripheral surface of the ribbon and the rotation speed of the feeding motor (7) are made to coincide with each other. That is, the core (4
When winding the ribbon (T) around (5), if the rotation speed of the winding core (45) is kept constant, the ribbon (T) will be wound and the winding will increase as the winding thickness increases. The outer peripheral speed of the thin ribbon (T) is inevitably high. As a result, the thin strip (T) will be pulled and wound around the winding core (45) by an excessive force, so that the thin strip (T) breaks in the middle of winding, or is wound more than necessary. Since the winding iron core is wound by the winding tightening force, it may not be possible to wind the winding iron core at a predetermined space factor.

Therefore, when winding the ribbon (T) around the winding core (45), the number of rotations of the roller (41) is detected as described above, and when the number of rotations of the roller (41) becomes a predetermined value or more, The rotation of the reel rotation motor (42) is decelerated by a deceleration command from the control device (70). That is, the peripheral speed of the wound core and the roller (41),
Make the rotation speed of the sending motor (7) the same. As a result, even if a plurality of thin strips (T) are overlapped with each other by the back tension device (11) and the braking roller (34) while a predetermined tension is applied, the thin strips (T) do not have a slack or overtightening and have a constant occupancy. Amorphous magnetic ribbon (T) winding core can be wound at a product rate. Further, since the drum-shaped roller (39) is formed such that the diameter of the central portion thereof is larger than that of the both ends and has a middle height, the thin belt (T) passes through the roller (39), so that the roller (39) is formed. The multiple ribbons (T) are all moved by this roller (39) in order to move in the direction of larger diameter.
Since it is hung on the central part of (39), the wound core can be wound with its winding end faces aligned. Ribbon
Should the thin ribbon (T) break during the winding of (T), this is detected by the detection sensor (61) and the rotation of the respective motors (7) and (42) is controlled by the control device (70). It is stopped by a command signal from.

(Effects of the Invention) According to the method and apparatus of the present invention, the following excellent practical effects are achieved.

(A) By winding a plurality of extremely thin amorphous magnetic ribbons drawn out from each winding shaft around a winding core while overlapping each other, the winding work efficiency of the iron core is significantly improved.

(B) A plurality of amorphous magnetic ribbons were once separated during the transportation, and the same tension was applied to each of them, so that slack and excessive pulling during transportation were caused. Each amorphous magnetic ribbon can be uniformly and smoothly wound around the winding core without breaking due to force, and a high-quality wound iron core having a good space factor can be manufactured.

(C) Amorphous magnetic ribbons having poor formability tend to have uneven thickness in the width direction, so that each amorphous magnetic ribbon can be moved in its moving direction by a simple guide with a normal feed roller. However, it is difficult to polymerize them in a state in which the side end surfaces are properly aligned with each other, but for each single amorphous magnetic ribbon, a large drum roller and front and rear 1
This alignment can be ensured by guiding with a set of guide fittings.

(D) Therefore, it is possible to prevent the vibration noise of the strip plate piece and the enlargement of the outer shape due to the unevenness of the end faces of the wound core.
Further, as an effect of the embodiment, when the ribbon is broken in the middle of winding or the end of the ribbon passes, this can be immediately detected by the detection sensor and the apparatus can be stopped. Since the guide fitting has an extremely simple structure, it can be easily adjusted according to the width dimension of the ribbon, and an appropriate tension can be applied by the back tension device and the braking roller during the conveying process. Since the winding iron core does not meander or sag, the wound iron core is wound in the best condition.

That is, the present invention provides a winding method and a winding device for a transformer iron core capable of quickly and surely winding an amorphous magnetic ribbon and economically.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a schematic side view of a winding device, Fig. 2 is a plan view of the same, Fig. 3 is a vertical sectional front view of a back tensioning device, and Fig. 4 is a vertical sectional side view of the same. FIG. 5 is a plan view of the same, FIG. 6 is a sectional view of a main part of a support metal fitting of a back tension device, and FIG. 7 is a vertical sectional front view of a main part of a guide metal fitting.
FIG. 9 is a vertical side view of the same, FIG. 9 is a sectional view of a guide roller, FIG. 10 is a front view of a drum-shaped roller, and FIG. 11 is a block diagram of a control system. (4) …… Sending device, (11) …… Back tension device (34) …… Braking roller, (39) …… Drum-shaped roller (T) …… Amorphous magnetic ribbon

Claims (2)

[Claims] 1. A method of using, as an iron core material, an amorphous magnetic ribbon, which has extremely excellent magnetic properties but is inferior in formability and strength properties, comprising: (a) a plurality of amorphous materials each drawn from each winding shaft. A step in which the magnetic ribbons are once polymerized and then delivered at a predetermined delivery speed by a delivery device; and (b) the plurality of polymerized amorphous magnetic ribbons are again separated one by one. In addition, a conveying / aligning step of aligning the side edges of the amorphous magnetic ribbons with each other using a drum-shaped roller while conveying the amorphous magnetic ribbons while applying a predetermined back tension. (C) While winding the aligned amorphous magnetic ribbons on the winding core while polymerizing them again, the peripheral speed of the winding peripheral surface,
And a winding step in which the delivery speed and the transport speed are matched with each other, and a winding method of a winding iron core for a transformer. 2. An apparatus for winding and forming a wound iron core by using an amorphous magnetic thin ribbon having extremely excellent magnetic characteristics but poor formability and strength characteristics, wherein: (a) each is drawn from each winding shaft. A plurality of amorphous magnetic ribbons are once polymerized, and a delivery device for drawing out at a predetermined delivery speed; and (b) The plurality of polymerized amorphous magnetic ribbons Each amorphous magnetic ribbon is conveyed while applying a predetermined back tension to each amorphous magnetic ribbon, and the side edges of each amorphous magnetic ribbon are aligned with each other using a drum-shaped roller. An aligning device, (c) a pair of front and rear guide fittings for accurately guiding the moving direction of each amorphous magnetic ribbon during the transportation, and (d) each amorphous magnetic aligned with each other. A winding device that winds the ribbon around the core while polymerizing it again, and (e) before And delivery rate of the amorphous magnetic ribbon, and the conveying speed,
A winding device for a winding core for a transformer, comprising: a control device that controls the peripheral speed of the winding peripheral surface of the amorphous magnetic ribbon to match.