JPH08236382A - Fiber winding equipment - Google Patents

Abstract

PURPOSE: To provide a fiber winding equipment which is capable of efficiently winding a plurality of fibers on a work keeping them uniform in tensile force and high in balance without disconnecting them. CONSTITUTION: Fibers 12a and 12b wound on bobbins 14a and 14b are measured for a tensile force by a tensile force measuring section 34, and a control section 36 which controls the motor 24 of a tensile force applying section in tensile force application basing on the measurement result is made to control the motor 24 so as to keep the total sum of the measured tensile forces of the fibers 12a and 12b within a prescribed range of tensile force, whereby the fibers 12a and 12b are wound on a rotor 20 as they are prevented from varying excessively in tensile force or becoming maximum or minimum in tensile force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber winding device for winding a fiber around a work, and more particularly, a fiber winding device for drawing a plurality of thin fibers at the same time from a bobbin and winding the work while maintaining a high tension. Regarding the improvement of the turning device.

[0002]

2. Description of the Related Art Conventionally, a wire or fiber wound around a bobbin is drawn out from the bobbin, and the drawn wire or fiber is wound around a work, for example, a core or bobbin of a motor, a transformer or the like a predetermined number of times to adjust characteristics or durability. Techniques for adjusting the strength are known. For example, in JP-A-61-1246, a permanent magnet is arranged on the surface of a rotor of a motor, and a fiber impregnated with a thermosetting resin is wound on the permanent magnet.
A technique is disclosed in which the fibers are heated and cured to fix a permanent magnet to a rotor of a motor to improve the durability of the rotor. In this case, since the rotor of the motor rotates at a high speed, it is required to firmly fix the permanent magnet with uniform force over the entire circumference of the rotor so that the permanent magnet does not scatter due to centrifugal force during rotation. . Further, since the space between the rotor and the stator of the motor has a great influence on the torque generated by the motor, it is desired to secure a predetermined space distance. Therefore, the fibers used are not bulky when wound,
It is required that it can be wound tightly. for that reason,
The fibers wound around the rotor are, for example, glass fiber wires (hereinafter simply referred to as fibers) formed by bundling hundreds (about 800) thin glass fibers having a thickness of about 13 μm.
And the like are used to apply high tension to the fiber, so that the fiber is thinly and tightly wound around the rotor.

However, when the fiber is wound around the rotor, since high tension is applied to the fiber, when the fiber is wound at a high speed, the fiber is loaded and broken. Therefore, the winding operation must be performed at a low speed, and there is a problem that winding takes time and productivity is poor.

Therefore, a plurality of, for example, two or three fibers are wound at the same time in the winding range of the rotor, and the winding time is 1 /
A so-called plural winding, which is shortened to 2,1 / 3, is performed.

[0005]

However, in the conventional plural winding, the tension control of the fiber is performed for each fiber by using a tension measuring device or the like. For example, when two windings using two fibers are performed, a tension measuring device is arranged for each fiber, and tension control is individually performed based on the measurement result.

Since the tension fluctuation of the fiber occurs continuously, 1
In the case of the main winding, the variation in tension of the adjacent portion is small, but in the case of a plurality of windings, there is no correlation between the tensions of the fibers, and the variation in the tension of the adjacent portion may become large.
When there is a large variation in the tension of the adjacent portion, there is a problem that when the resin impregnated into the fiber is heated and cured, the fiber breakage easily occurs due to the difference in the expansion / contraction conditions of the fiber in the adjacent portion.

When all the fibers are wound at the upper limit value of the tension, each fiber has a possibility of disconnection, which increases the possibility of disconnection of the rotor as a whole. On the contrary, if all the windings are wound at the lower limit, there is a problem that reliability of holding the permanent magnet is reduced.

Further, when the fiber is drawn from the bobbin around which the fiber is wound, the fiber is drawn while sliding on the bobbin in the width direction of the bobbin, so that friction due to side slip occurs and the tension becomes unstable, and There was a problem that the disconnection of the item is likely to occur.

The present invention has been made to solve the above problems, and it is possible to reduce variations in the tension of a plurality of fibers, balance each other, and wind the fibers around a work without breaking the fibers. An object is to provide a fiber winding device.

[0010]

In order to achieve the above object, the present invention is as follows. First, in a fiber winding device for simultaneously winding a plurality of thin fibers on a work, the thin fibers are wound. A plurality of bobbin supporting portions that rotatably support the bobbins, a tension applying portion that is connected to each bobbin supporting portion and applies a predetermined tension to the small-diameter fibers that are drawn from each bobbin, and a bobbin that has a predetermined tension and is pulled out from the bobbin. Fiber winding part that winds a thin fiber around a work, a plurality of tension measuring parts that measure the tension of each thin fiber, and adjust the tension application of the tension applying part based on the measurement result of the tension measuring part. And a control unit, wherein the control unit maintains the total sum of the measured tensions within a predetermined tension range.

Secondly, in a fiber winding device for simultaneously winding a plurality of small diameter fibers around a work, a plurality of bobbin supporting portions for rotatably supporting a bobbin wound with the small diameter fibers, A tension applying portion that is connected to each bobbin supporting portion and applies a predetermined tension to the small-diameter fiber drawn from each bobbin, and a fiber winding portion that winds the small-diameter fiber having a predetermined tension and drawn from the bobbin around a work. And a plurality of tension measuring units that measure the tension of each thin fiber, and a control unit that performs tension imparting adjustment of the tension imparting unit based on the measurement result of the tension measuring unit, and the control unit includes It is characterized in that the difference is maintained within a predetermined tension difference.

Thirdly, in the first fiber winding device or the second fiber winding device, a small diameter is obtained between the bobbin supporting portion and the fiber winding portion by following the small diameter fiber drawing position. It is characterized in that a fiber guide portion movable in a direction orthogonal to the fiber drawing direction is provided.

[0013]

According to the first configuration, the control section for adjusting the tension application of the tension applying section based on the measurement result of the tension measuring section,
Since the tension applying part is controlled so as to maintain the total sum of each measured tension within the predetermined tension range, the tension of each fiber may fluctuate extremely, or the tension of all fibers may become maximum or minimum. Since the tension of each fiber is stable, the fibers can be wound with a uniform force over the entire circumference of the rotor without breaking. Further, according to the second configuration, the control unit that adjusts the tension application of the tension application unit based on the measurement result of the tension measurement unit maintains the difference between the measured tensions within the predetermined tension difference, so that the tension of each fiber Variation is reduced and the tension of each fiber can be made closer to each other, the tension of each fiber is stable and it is possible to wind the fiber with a uniform force over the entire circumference of the rotor without breaking the wire. it can.

Further, according to the third structure, the fiber guide portion is provided between the bobbin support portion and the fiber winding portion, and follows the thin fiber drawing position, and is a direction orthogonal to the thin fiber drawing direction. The movement of the fiber into the bobbin is reduced when the fiber is pulled out, the load applied to the fiber is reduced, the tension is stabilized, and the disconnection due to friction is reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

First embodiment. FIG. 1 is a plan view showing a schematic configuration of a multi-winding fiber winding device of this embodiment. As shown in FIG. 1, the fiber winding device 10 includes a bobbin supporting portion 16 that supports a bobbin 14 wound with a fiber 12 supplied from a fiber maker, a resin impregnation tank 18 that impregnates the fiber 12 with a resin, Fiber 12 on rotor 20 of the motor which is the work
It is composed of a fiber winding portion 22 and the like for winding the. The bobbin 14 has a thickness of 13 μm as the fiber 12, for example.
It has a substantially cylindrical shape in which glass fiber wires formed by bundling hundreds (about 800) of glass fibers having a small diameter are wound in units of several hundred meters. In addition, the bobbin supporting portion 16 supports the bobbin 14 so as to be rotatable around the winding shafts 16a and 16b. The bobbin supporting portion 16 has a tension applying portion composed of a motor 24 capable of controlling rotation and a torque generator such as a powder clutch (not shown). The bobbin supporting portion 16 is located in a direction opposite to the arrow A direction in the drawing where the fiber 12 is pulled out. A certain amount of rotational force is added. Since the bobbin supporting portion 16 of the fiber winding device 10 of the present embodiment winds a plurality of fibers 12, for example, two fibers 12a and 12b around the rotor 20 at the same time,
The bobbin supporting portions 16a and 16b of the stand are arranged in a stepwise manner in the front and back direction of the paper, and the fibers 12a and 12b are guided to adjacent positions during the drawing and wound around the rotor 20. Therefore, the fiber 12 is wound around the rotor 20 at a pitch twice as large as that of one winding, and the winding time can be halved.

The resin impregnation tank 18 is filled with, for example, a thermosetting adhesive resin, and the fibers 12a and 12b pulled out from the bobbins 14a and 14b are gently moved by a plurality of guide rollers 26a, 26b and 26c. It is bent to the inside and guided into the resin impregnation tank 18. The fiber 12 is impregnated with resin on the lower surface side of the guide roller 26b.

On the other hand, the fiber winding portion 22 is provided with a constant speed motor 28 supporting a rotor 20 of a motor having a permanent magnet (not shown) on its surface, and the rotor 20 is fixed by the constant speed motor 28. Rotate fast. The rotational force of the constant speed motor 28 is set to be larger than the rotational force of the motor 24 of the bobbin supporting portion 16, and tension is applied to the fiber 12 by the difference in the rotational force between the constant speed motor 28 and the motor 24.

The constant speed motor 28, while supporting the rotor 20, is fed at a constant pitch in the direction of arrow B in the figure by a constant pitch feed mechanism including a control motor 30 such as a servo motor and a ball screw 32. Therefore, the resin-impregnated fiber 12 can be wound around the rotor 20 at a constant pitch by feeding the resin 12 in the direction of the arrow B at a constant pitch while rotating the rotor 20 at a constant speed. Thereafter, the rotor 20 around which the fibers 12 are wound is heated at a predetermined temperature for a predetermined time to cure the resin and firmly fix the permanent magnet to the rotor 20.

The characteristic feature of this embodiment is that, for each fiber, a tension measuring section for measuring the tension of the fiber and a bobbin for each fiber are rotated in the direction opposite to the fiber pull-out direction based on the measurement result of the tension measuring section. A control unit for controlling the associated motors is provided, and the tension is adjusted by using the sum or difference of the tensions of the respective fibers.

A tension measuring section 34 for directly measuring the tension of the fiber 12 is arranged between the bobbin supporting section 16 and the fiber winding section 22, for example, immediately before the resin impregnation tank 18. The tension measuring section 34 is provided below the fiber 12 via a roller or the like.
Pushing 2 down. The reaction force at that time is measured and used as the tension. The tension measuring unit 34 has a tracing stylus for measuring the fibers 12a and 12b, and supplies the respective tensions to the control unit 36.

The tension measuring unit 34 continuously measures the tension, and the control unit 26 controls the motor 2 at predetermined intervals, for example, every 3 minutes.
4 is controlled to adjust the tension.

The rotational force P of the motor 24 is represented by P = r × T (r: radius of bobbin 16, T: tension of fiber 12).
Therefore, when the rotational force P is constant, the radius r of the bobbin 14 decreases due to the use of the fiber 12, and the tension T of the fiber 12 increases.
Will increase. Therefore, in order to keep the tension constant, it is necessary to control the rotational force P of the motor 24. Therefore, the rotational force P of the motor 24 is controlled such that the tensions Ta and Tb of the respective fibers fall within a predetermined tension range, for example, T = 5 kgf ± 0.5 kgf. That is, tmin = 4.
Control is performed so that 5 kgf≤Ta and Tb≤tmax = 5.5 kgf.

As shown in the flow chart of FIG. 2, the tension measuring unit 34 measures the tensions Ta and Tb (S101).
First, the tension Ta of the fiber 12a is compared with the upper limit value tmax as in the conventional tension feedback control (S102). If the tension Ta is larger than tmax, the output of the motor 24a is decreased by a predetermined amount to control the tension Ta so that the tension T is adjusted again.
a is measured (S103). And again, the upper limit value tmax
And is repeatedly compared (S102). The motor 2
The control of 4a is performed by changing the supplied current or voltage. The rate of change of the supply current or voltage at this time is 1 to 20.
% Is desirable. This comparative adjustment is repeated, and when the tension Ta becomes smaller than the upper limit value tmax, it is compared with the lower limit value tmin (S104). If the tension Ta is smaller than tmin, the output of the motor 24 is increased by a predetermined amount to control the tension Ta to increase, and the adjusted tension Ta is measured (S105) and compared with the lower limit value tmin. Repeatedly (S104). Adjustment of this lower limit value is also repeated, and as a result, the tension Ta of the fiber 12a is Ta = 5 kgf ± 0.5.
Control in the range of kgf. Next, the tension Tb of the fiber 12b
Similarly, control is performed so that Tb = 5 kgf ± 0.5 kgf (S106 to S109).

When the tension is adjusted for each of the fibers 12a and 12b as described above, both the tensions Ta and Tb are the upper limit tension (t
It may be wound at max). Since each of the fibers 12a and 12b has a possibility of disconnection, the possibility of disconnection increases as a whole. Further, when only the lower limit tension (tmin) is wound, the reliability of holding the permanent magnet to which the rotor 20 is fixed cannot be sufficiently maintained. Therefore, in this embodiment, the sum of the tension Ta of the fiber 12a and the tension Tb of the fiber 12b is calculated, and the sum is maintained at a predetermined value to prevent both the tensions Ta and Tb from reaching the upper limit value or the lower limit value. are doing. In this embodiment, the sum of tensions T is, for example, T
The rotational force of the motor 24 is controlled so that = Ta + Tb = 10 kgf ± 0.5 kgf. That is, T1 min =
Control is performed so that 9.5 kgf≤T≤T1max = 10.5 kgf. First, the tension Ta adjusted within a predetermined range,
The sum of Tb is calculated (S110). Then, the tension sum T is compared with the upper limit value T1max (S111). If the tension sum T
Is larger than T1max, the tension Ta and the tension Tb are further increased.
(S112), the output of the motor 24 that is generating the larger tension is reduced by a predetermined amount, and the tension sum is calculated for the readjusted tensions Ta and Tb (S113 to S114). Then, the tension sum T and the upper limit value T
This control is repeated until the tension sum T becomes smaller than the upper limit value T1max. In this case as well, it is desirable that the rate of change of the supply current or voltage of the motor 24 is 1 to 20%. In this embodiment, the tension Tb is adjusted when Ta = Tb, but Ta may be adjusted. And
When the tension sum T becomes smaller than the upper limit value T1max, the tension sum T
And lower limit value T1min are similarly compared (S115 to S1
18), the motor 24 is controlled so that T = Ta + Tb = 10 kgf ± 0.5 kgf.

By thus adjusting the sum of the tension Ta and the tension Tb within a predetermined range, the fibers 12a, 12b are
Is prevented from becoming the upper limit tension, and the occurrence rate of wire breakage in the rotor 20 as a whole can be reduced. Also,
Both the fibers 12a and 12b are prevented from reaching the lower limit tension, and the reliability of holding the permanent magnet fixed to the rotor 20 can be improved.

The above-described control by the control unit 36 is performed, for example, every 3 minutes, but if it is performed more frequently, it is possible to adjust the tension while minimizing the fluctuation of the tension. By reducing the fluctuation, the possibility of disconnection can be further reduced.

Second embodiment. In the second embodiment, by controlling the difference between the tension Ta and the tension Tb within a predetermined range, when the fibers 12a and 12b are wound around the rotor 20 adjacently, the difference in tension between the fibers 12a and 12b is reduced and the occurrence rate of wire breakage. Is to reduce.

The flowchart of FIG. 3 is the second half of the control utilizing the tension difference, and the first half is the same as (S101) to (S108) of the flowchart of FIG.

After the adjustment of the fibers 12a and 12b is completed, the control unit 36 controls the tension difference T between the fibers 12a and 12b.
= Ta-Tb is calculated (S201). Then, the absolute value of the tension difference T is compared with the target tension difference range T2 (S
202). This target tension difference range T2 is, for example, 0.5 k
gf. If the absolute value of the tension difference T is larger than the target tension difference range T2, the tension Ta and the tension Tb are compared (S203), and the output of the motor 24 generating the larger tension is reduced by a predetermined amount. Adjusted tension Ta
, Tb, the tension difference T is calculated again (S204
~ S205). Then, the absolute value of the tension difference T is compared with the target tension difference range T2 (S202), and the control is repeated until the tension difference T becomes smaller than the target tension difference T2.

In this way, by controlling the tension difference between the fibers 12a and 12b within a predetermined range, the fibers 12a
Even when a and the fiber 12b are adjacent to each other, the difference in tension between them is small, and when the resin impregnated into the fiber is heated and cured, the expansion and contraction conditions of the adjacent parts can be made almost the same, so there is a difference in the expansion and contraction conditions. It is possible to prevent disconnection of the fiber 12.

In the above-described first and second embodiments, when the fiber 12 wound around the bobbin 14 is pulled out in one direction, the fiber 12 wound around the end of the bobbin 14 is wound on the bobbin. It slides on 14 and moves to a pull-out position, for example, near the center of bobbin 14. Therefore, the fiber 12 always swings by the width of the bobbin. Therefore, as a result of rubbing against the fiber wound on the lower layer of the bobbin 14, the frictional resistance increases and the wire breaks. Therefore, as shown in FIG. 4A, the fiber 1 is provided between the bobbin supporting portion and the fiber winding portion, that is, at a position adjacent to the bobbin 14.
A fiber guide portion 38 that is movable in the direction of arrow C in the drawing is arranged according to the winding position of 2. The roller portion 40 of the fiber guide portion 38 has a ball bearing 40a so that the shaft portion 42 can smoothly slide in the arrow C direction as shown in FIG. 4 (b). Therefore, when the fiber 12 is pulled out, the roller portion 40 moves following the withdrawal position of the fiber 12 and can prevent the fiber 12 from sliding on the bobbin 14 as the fiber 12 is pulled out. ,
It is possible to prevent breakage of the fiber 12.

Further, as shown in FIG.
By providing a plurality of movable bobbin guide portions 38 in front of each other, the pulling distance of the fiber 12 can be lengthened. As a result, the fiber 1 is drawn by pulling out the fiber 12.
(2) It is possible to reduce the deflection angle and further reduce disconnection.

The breakage of the fiber 12 can be prevented even when the fiber 12 is wound with high tension by improving the fiber winding device and changing the shape of the rotor 20 as shown in FIGS. 6 and 7. It is possible to reduce disconnection.

As shown in FIG. 6A, the rotor 20 is formed by stacking a plurality of thin plates 20a made of silicon steel plates, around which a permanent magnet 44a is fixed by the fibers 12. At this time, as shown in FIG.
By coating the surface of 0a with the resin rubber adhesive 46, it is possible to eliminate the irregularities on the surface of the thin plate 20a and the gaps at the joints of the thin plate 20a. Can be prevented from breaking. Further, as shown in FIG. 7A, the resin rubber adhesive 46 is coated on the edge portion of the permanent magnet 44a, so that the disconnection can be similarly prevented. Further, as shown in FIGS. 7 (b) and 7 (c), a large R, for example, R = 1 mm is provided at the upper end 44b and the lower end 44c of the edge portion of the permanent magnet to prevent disconnection satisfactorily. You can

In this embodiment, two fibers are wound adjacent to each other around the rotor, but the same effect can be obtained by winding the fibers from both ends of the rotor toward the center. .
Further, the same effect can be obtained even when wound with two or more fibers.

Further, in the present embodiment, the example in which the fiber is wound around the rotor of the motor has been shown, but when the wire or the like is wound around another work, for example, the coil of the transformer or the like, the disconnection defect is reduced. It is possible to obtain various effects.

[0038]

According to the fiber winding device of the present invention, the control section for adjusting the tension application of the tension applying section based on the measurement result of the tension measuring section maintains the total sum of the respective measured tensions within the predetermined tension range. Since the tension applying part is controlled in this way, the tension of each fiber does not fluctuate extremely, the tension of all fibers does not become maximum or minimum, the tension of each fiber is stable, Since it is possible to wind a plurality of fibers with a uniform force over the entire circumference of the child, it is possible to prevent disconnection of the fibers,
The winding time of the fiber can be reduced and the productivity can be improved. In addition, the winding quality can be improved.

Further, according to the fiber winding device of the present invention, the control section for adjusting the tension application of the tension applying section based on the measurement result of the tension measuring section maintains the difference between the respective measured tensions within the predetermined tension difference. Therefore, the variation in the tension of each fiber is reduced, and the tension of each fiber can be made close to each other, so that the tension of each fiber is stable and the fibers are wound with a uniform force over the entire circumference of the rotor. Therefore, it is possible to prevent breakage of the fiber, reduce the winding time of the fiber, and improve the productivity. In addition, the winding quality can be improved.

Further, according to the fiber winding device of the present invention,
The fiber guide part is provided between the bobbin supporting part and the fiber winding part, and moves in the direction orthogonal to the thin fiber withdrawing direction following the small fiber withdrawing position, so that the fiber moves on the bobbin at the time of withdrawing the fiber. The slippage is reduced, the load on the fiber is reduced, the tension is stabilized, and the disconnection due to friction can be reduced, so that the winding time of the fiber can be reduced and the productivity can be improved, The winding quality can be improved.

[Brief description of drawings]

FIG. 1 is a plan view illustrating a schematic configuration of a fiber winding device according to the present invention.

FIG. 2 is a flow chart of a first embodiment of the fiber winding device according to the present invention.

FIG. 3 is a flow chart of a second embodiment of the fiber winding device according to the present invention.

FIG. 4 is an explanatory diagram illustrating a fiber guide portion of the fiber winding device according to the present invention.

FIG. 5 is an explanatory diagram illustrating the arrangement of fiber guide portions of the fiber winding device according to the present invention.

FIG. 6 is an explanatory diagram illustrating a rotor shape that reduces fiber breakage.

FIG. 7 is an explanatory diagram illustrating a rotor shape that reduces fiber breakage.

[Explanation of symbols]

10 fiber winding device, 12 fiber (small diameter fiber), 14
Bobbin, 16 bobbin support, 18 resin impregnation tank, 20
Rotor (workpiece), 22 fiber winding part, 24 motor
26a, 26b, 26c Guide roller, 34 Tension measuring part, 36 Control part, 38 Fiber guide part, 40 Roller part.

Claims (3)

[Claims] 1. A fiber winding device for simultaneously winding a plurality of small-diameter fibers around a work, and a plurality of bobbin supporting parts for rotatably supporting a bobbin wound with the small-diameter fibers, and each bobbin supporting part. Connected to the bobbin and applying a predetermined tension to the thin fibers drawn from each bobbin; a fiber winding part that has a predetermined tension and winds the thin fibers drawn from the bobbin around the work; A plurality of tension measuring units for measuring the tension of the diametrical fiber, and a control unit for adjusting the tension imparting of the tension imparting unit based on the measurement result of the tension measuring unit, wherein the control unit sums the respective measured tensions to a predetermined tension. A fiber winding device characterized by being maintained within a range. 2. A fiber winding device for simultaneously winding a plurality of small-diameter fibers around a work, and a plurality of bobbin supporting parts for rotatably supporting a bobbin wound with the small-diameter fibers, and each bobbin supporting part. Connected to the bobbin and applying a predetermined tension to the thin fibers drawn from each bobbin; a fiber winding part that has a predetermined tension and winds the thin fibers drawn from the bobbin around the work; A plurality of tension measuring units for measuring the tension of the diameter fibers, and a control unit for adjusting the tension imparting of the tension imparting unit based on the measurement result of the tension measuring unit, wherein the control unit determines the difference between the respective tensions to be the predetermined tension. A fiber winding device characterized by being maintained within a difference. 3. The fiber winding device according to claim 1 or 2, wherein the small fiber drawing position is followed between the bobbin supporting portion and the fiber winding part and is orthogonal to the small fiber drawing direction. A fiber winding device comprising a fiber guide portion movable in a predetermined direction.