JP3422118B2 - Fiber winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber winding apparatus for winding a fiber around a work, and more particularly, to a method for simultaneously drawing a plurality of small diameter fibers from a bobbin to a work. The present invention relates to an improvement in a fiber winding device that winds while maintaining tension. 2. Description of the Related Art Conventionally, a wire or fiber wound on a bobbin is drawn from the bobbin, and the drawn wire or fiber is wound around a work, for example, a core or bobbin of a motor or a transformer, etc. a predetermined number of times. Techniques for performing adjustment and durability strength adjustment are known. For example, in JP-A-61-1246, a permanent magnet is arranged on the rotor surface of a motor, and a fiber impregnated with a thermosetting resin is wound over the permanent magnet,
There is disclosed a technology 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 high speed, it is required that the permanent magnet be firmly fixed with a uniform force over the entire circumference of the rotor so that the permanent magnet is not scattered by centrifugal force during rotation. . Further, since the space between the rotor and the stator of the motor has a great effect on the torque generated by the motor, it is desirable to secure a predetermined space distance. Therefore, the fibers used are not bulky during winding,
It is required that it can be wound firmly. for that reason,
The fiber wound around the rotor is, for example, a glass fiber wire (hereinafter simply referred to as a fiber) formed by bundling several hundred (about 800) thin glass fibers having a thickness of about 13 μm.
By applying a high tension to the fiber using the method described above, the fiber is thinly and firmly wound around the rotor. However, when a fiber is wound around a rotor, a high tension is applied to the fiber, so that when the fiber is wound at a high speed, a load is applied to the fiber and the fiber is disconnected. For this reason, the winding operation must be performed at a low speed, and there is a problem that winding takes a long time and productivity is low. [0004] Therefore, the winding range of the rotor is increased by winding a plurality of fibers, for example, two or three fibers at the same time, and reducing the winding time by 1 /.
So-called multiple winding, which is reduced to 2/3, is performed. [0005] However, in conventional multiple winding, tension management of the fiber is performed for each fiber by using a tension measuring device or the like. For example, when performing two windings using two fibers, a tension measuring device is disposed for each fiber, and the tension is individually controlled based on the measurement result. [0006] Since the tension fluctuation of the fiber occurs continuously,
In the case of this winding, the variation in the 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 be large.
When there is a large variation in the tension of the adjacent portion, there is a problem that when the resin impregnated in the fiber is heated and cured, the fiber is liable to be broken due to a difference in expansion and contraction conditions of the fiber in the adjacent portion. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to reduce the variation in tension of a plurality of fibers, balance each other, and wind the fibers around a work without disconnecting the fibers. It is an object to provide a fiber winding device. [0008] According to an aspect of the present invention in order to achieve the above object, in a fiber winding apparatus for winding a small diameter fibers of several multiple simultaneously work, by winding a thin fiber A plurality of bobbin support portions rotatably supporting the bobbin, a tension applying portion connected to each bobbin support portion for applying a predetermined tension to the small diameter fiber drawn from each bobbin, and a predetermined tension pulled out from the bobbin A fiber winding section for winding the fine fiber to be wound around the work, and a plurality of tension measuring sections for measuring the tension of each fine fiber,
The difference in tension between the two fine fibers measured by the tension measuring unit is
If the tension difference is larger than the predetermined tension difference,
Predetermined tension difference by reducing tension of large-diameter small-diameter fiber
And a controller for performing tension application adjustment within the force difference.
And wherein and the son-in-law. [0009] According to [action] above Ki構 formation, control unit for tensioning adjustment of the tension applying portion based on the measurement result of the tension measurement unit so as to maintain the difference between the measured tension within a predetermined tension difference , Two fine
Find the tension difference of the diameter fiber, and the difference is larger than the specified tension difference.
If the tension is high, reduce the tension
Since the tension difference is adjusted within the predetermined tension difference , the dispersion of the tension of each fiber is reduced, and the tension of each fiber can be made closer, so that the tension of each fiber is stable, and the fibers rotate without breaking. The fiber can be wound with a uniform force over the entire circumference of the child. Preferred embodiments of the present invention will be described below with reference to the drawings. [0011] A plurality of small diameter fibers are wound by a fiber winding device.
When performed simultaneously, all fibers are wound at the upper limit of the tension.
If each fiber is broken,
As a whole, the possibility of disconnection increases. Also, conversely
The reliability of holding the permanent magnet when all are wound at the lower limit
May be reduced. In the description of this embodiment,
Following description of the structure of the fiber winding device of the embodiment,
Control to avoid the above phenomenon
Will be described first for reference. FIG . 1 is a plan view showing a schematic configuration of a multi-filament fiber winding device of the present embodiment. As shown in FIG.
The fiber winding device 10 includes a bobbin support portion 16 that supports a bobbin 14 on which a fiber 12 supplied from a fiber maker is wound.
And a resin impregnation tank 18 for impregnating the fiber 12 with a resin, a fiber winding part 22 for winding the fiber 12 around a rotor 20 of a motor as a work, and the like. The bobbin 14
Has a substantially cylindrical shape in which, for example, a glass fiber wire formed by bundling several hundred (about 800) thin glass fibers having a diameter of about 13 μm and being bundled in units of several hundred meters is used as the fiber 12. ing. Also, the bobbin support 16 is
The bobbin 14 is supported rotatably about the winding shafts 16a and 16b. The bobbin support 16 has a motor 24 whose rotation can be controlled, and a tension applying portion composed of a torque generator such as a powder clutch (not shown). The bobbin support 16 is located in a direction opposite to the direction indicated by the arrow A in FIG. A fixed amount of torque is added. In addition, the bobbin support part 16 of the fiber winding device 10 of the present embodiment has a plurality of fibers 12, for example, two fibers 12a, 1a.
In order to wind 2b around the rotor 20 at the same time, the two bobbin support portions 16a, 16b are arranged stepwise in the front and back directions on the paper surface, and the fibers 12a, 12b are guided to adjacent positions during the drawing and wound around the rotor 20. Is done. Therefore, the fiber 12 is 1
It is wound around the rotor 20 at twice the pitch of the main winding, and the winding time can be reduced to half. The resin impregnation tank 18 is filled with, for example, a thermosetting adhesive resin, and the fibers 12a, 12b drawn out of the bobbins 14a, 14b are gently moved by a plurality of guide rollers 26a, 26b, 26c. 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, a constant speed motor 28 which supports a motor rotor 20 whose surface is borrowed with a permanent magnet (not shown) is disposed in the fiber winding section 22. The constant speed motor 28 controls the rotor 20 at a constant speed. 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 support portion 16, and tension is applied to the fiber 12 by the difference between the rotational forces of the constant-speed motor 28 and the motor 24. The constant-speed motor 28 is fed at a constant pitch in the direction of arrow B in the drawing by a constant-pitch feed mechanism including a control motor 30 such as a servomotor and a ball screw 32 while supporting the rotor 20. Accordingly, the resin-impregnated fibers 12 can be wound around the rotor 20 at a constant pitch by rotating the rotor 20 at a constant speed and feeding it in the direction of arrow B at a constant pitch. Thereafter, the rotor 20 around which the fiber 12 is wound is heated at a predetermined temperature for a predetermined time, whereby the resin is cured and the permanent magnet is firmly fixed to the rotor 20. In the apparatus having the above configuration, the reference technique
In operation, for each fiber, control is performed while associating a tension measuring unit that measures the tension with each motor that rotates the bobbin of each fiber in the direction opposite to the fiber drawing direction based on the measurement result of the tension measuring unit. a control unit for providing, intends line tension adjusted by using the sum of the tension in the fibers. A tension measuring section 34 for directly measuring the tension of the fiber 12 is disposed between the bobbin supporting section 16 and the fiber winding section 22, for example, immediately before the resin impregnation tank 18. The tension measuring unit 34 is provided below the fiber 12 via a roller or the like.
2 up and down. The reaction force at that time is measured and defined as tension. The tension measuring section 34 has a measuring element for measuring each of the fibers 12a and 12b, and supplies each tension to the control section 36. The tension measuring section 34 continuously measures the tension, and the control section 36 controls the motor 2 at predetermined intervals, for example, at intervals of 3 minutes.
The control of 4 is performed to adjust the tension. The rotational force P of the motor 24 is represented by P = r × T (r: radius of the bobbin 16, T: tension of the fiber 12).
Therefore, when the rotational force P is constant, the radius r of the bobbin 14 is reduced by the use of the fiber 12, and the tension T of the fiber 12 is reduced.
Increases. Therefore, in order to keep the tension constant, it is necessary to control the rotational force P of the motor 24. Therefore, a predetermined tension range for each of the tensions Ta and Tb of each fiber,
For example, the rotational force P of the motor 24 is controlled so that T = 5 kgf ± 0.5 kgf. That is, tmin = 4.5k
Control is performed so that gf ≦ Ta and Tb ≦ tmax = 5.5 kgf. As shown in the flowchart of FIG. 2, the tension measuring section 34 measures the tensions Ta and Tb (S101). First, the tension Ta of the fiber 12a is compared with the upper limit value tmax in the same manner as the conventional tension feedback control (S102). If the tension Ta is larger than tmax, the output of the motor 24a is reduced by a predetermined amount, and the tension Ta is reduced.
Is reduced, and the adjusted tension Ta is measured again (S103). Then, the comparison with the upper limit value tmax is repeated again (S102). The control of the motor 24a is performed by changing the supplied current and voltage. At this time, the change rate of the supply current or the voltage is preferably 1 to 20%. When the comparison and adjustment are repeated and the tension Ta becomes smaller than the upper limit value tmax, a comparison with the lower limit value tmin is performed (S104). If the tension Ta is smaller than tmin,
The output of the motor 24 is increased by a predetermined amount, the tension Ta is controlled to increase, and the adjusted tension Ta is measured (S1).
05), the comparison with the lower limit value tmin is repeatedly performed (S10).
4). This lower limit is also adjusted repeatedly, and as a result, the tension Ta of the fiber 12a is controlled in the range of Ta = 5 kgf ± 0.5 kgf. Next, the tension Tb of the fiber 12b is similarly controlled so that Tb = 5 kgf ± 0.5 kgf (S106 to S109). When the tension is adjusted for each of the fibers 12a and 12b in this manner, the tensions Ta and Tb are both set to the upper limit tension (tma).
x). Since the fibers 12a and 12b each have a possibility of disconnection, the possibility of disconnection increases as a whole. Further, when the winding is performed only with the lower limit tension (tmin), the reliability of holding the permanent magnet fixed to the rotor 20 cannot be sufficiently maintained. Therefore, textiles 12
calculates the sum of the tension Tb in a tension Ta and fibers 12b, tension Ta by maintaining the sum to a predetermined value, Tb are both prevented Rukoto such an upper limit value or the lower limit value. The sum T of Zhang force, for example, T = Ta + Tb = 10kgf ± 0.5k
controlling the rotational force of the motor 24 to so that such a gf. That is, T1min = 9.5 kgf ≦ T ≦ T1max = 10.5 kg
control to be f. First, the sum of the tensions Ta and Tb adjusted within a predetermined range is obtained (S110). Then, the tension sum T is compared with the upper limit T1max (S111). If the tension sum T is greater than T1max, the tension Ta
Is compared with the tension Tb (S112), the output of the motor 24 generating the larger tension is reduced by a predetermined amount, and the tension sum is calculated again for the tensions Ta and Tb adjusted again (S113 to S113). S114). Then, the tension sum T is compared with the upper limit T1max, and this control is repeated until the tension sum T becomes smaller than the upper limit T1max. Also in this case, the rate of change of the supply current and voltage of the motor 24 is 1 to 20.
% Is desirable. When Ta = Tb, the tension Tb is adjusted, but Ta may be adjusted. When the tension sum T becomes smaller than the upper limit T1max, the tension sum T and the lower limit T are set.
Comparison with 1 min is similarly performed (S115 to S118), and T
= Controls the so that the motor 24 such to Ta + Tb = 10kgf ± 0.5kgf. By adjusting the sum of the tension Ta and the tension Tb within a predetermined range as described above, the tension of each fiber becomes extremely high.
Fluctuates or maximizes or minimizes the tension of all fibers
It does not lose, the tension of each fiber is stable,
With uniform force over the entire circumference of the rotor without disconnection
Can be wound. That is, both the fibers 12a and 12b are prevented from reaching the upper limit tension, and the occurrence rate of disconnection of the entire rotor 20 can be reduced. Also,
It is prevented that both fibers 12a and 12b reach the lower limit tension.
To improve the reliability of holding the permanent magnet fixed to the rotor 20.
Can be up. Thus, the winding time of the fiber
It is possible to reduce and improve the productivity. Also, wound products
Quality can be improved. The above-described control by the controller 36 is performed, for example, every three minutes. However, if the control is performed more frequently, the tension can be adjusted while minimizing the fluctuation of the tension. By reducing the fluctuation, the possibility of disconnection can be further reduced. Next, this embodiment will be described specifically.
The characteristic feature of this embodiment is that the tension of each fiber is measured.
Tension measuring unit to perform, and based on the measurement result of the tension measuring unit,
Rotate the fiber bobbin in the direction opposite to the fiber
A control unit that controls each motor
The tension adjustment by using the difference in tension for each fiber.
It is about to do. The present real施例by managing the difference between the tension Ta and tension Tb in a predetermined range, the fibers 12 to the rotor 20
When a and 12b are wound adjacent to each other, the difference in tension between the two is reduced to reduce the incidence of disconnection. The flowchart of FIG. 3 is the latter half of the control using the tension difference, and the first half is the same as (S101) to ( S109 ) of the flowchart of FIG. When the adjustment of each of the fibers 12a and 12b is completed, the controller 36 sets 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 (S2).
02). The target tension difference range T2 is, for example, 0.5 kg
f. If the absolute value of the tension difference T is equal to the target tension difference range T
If it is larger than 2, the tension Ta and the tension Tb are compared (S203), and the output of the motor 24 that generates the larger tension is reduced by a predetermined amount to adjust the adjusted tension Ta,
The tension difference T is calculated again with respect to Tb (S204 to S204).
205). 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. As described above, by controlling the tension difference between the fibers 12a and 12b within a predetermined range,
Even when a and the fiber 12b are adjacent to each other, the difference in tension between the two is small, and when the resin impregnated in the fiber is cured by heating, the conditions for expansion and contraction of the adjacent portion can be made almost the same. The occurrence of disconnection of the fiber 12 can be prevented. In the above-described reference example and embodiment, when the fiber 12 wound around the bobbin 14 is pulled out in one direction when the fiber 12 is pulled out, the fiber 12 wound around the end of the bobbin 14 moves on the bobbin 14. It moves to the drawer position, for example, near the center of the bobbin 14 while sliding. Therefore, the fiber 12 always swings by the width of the bobbin. For this reason, as a result of rubbing with the fiber wound on the lower layer of the bobbin 14, the frictional resistance increases and the wire breaks. Therefore, FIG.
As shown in (a), between the bobbin support portion and the fiber winding portion,
That is, the fiber guide portion 3 which can move in the direction of arrow C in the figure according to the winding position of the fiber 12 is provided at a position adjacent to the bobbin 14.
8 are arranged. Roller part 4 of this fiber guide part 38
No. 0 has a ball bearing 40a so that the shaft portion 42 can slide smoothly in the direction of arrow C as shown in FIG. Therefore, when the fiber 12 is pulled out, the roller portion 40 moves following the drawing position of the fiber 12, and the fiber 12
4 it is possible to prevent sliding on, or in fiber
This reduces load, stabilizes tension, and reduces friction.
According it is possible to prevent disconnection of the fiber 12. Also,
Can reduce the winding time of fiber and improve productivity
At the same time, the winding quality can be improved. Further, as shown in FIG.
By providing a plurality of movable bobbin guides 38 before the operation, etc., the drawing distance of the fiber 12 can be increased. As a result, the fiber 1
(2) The deflection angle can be reduced, and the disconnection can be further reduced. The disconnection of the fiber 12 can be prevented by changing the shape of the rotor 20 as shown in FIGS. 6 and 7 together with the improvement of the fiber winding device, so that the fiber 12 is wound with high tension. Disconnection can be reduced. As shown in FIG. 6A, the rotor 20 is formed by laminating a plurality of thin plates 20a formed of a silicon steel plate, and a permanent magnet 44a is fixed by the fibers 12 around the thin plates 20a. At this time, as shown in FIG.
By coating the resin rubber adhesive 46 on the surface of the thin plate 20a, the unevenness on the surface of the thin plate 20a and the gap at the joint of the thin plate 20a can be eliminated. Can be prevented from being disconnected. Also, as shown in FIG. 7A, by coating the edge of the permanent magnet 44a with a resin rubber adhesive 46, 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. Can be. In the above description, the present embodiment shows an example in which two fibers are wound around the rotor adjacent to each other. However, the same applies when the fibers are wound from both ends of the rotor toward the center. The effect can be obtained. Further, the same effect can be obtained even when wound with two or more fibers. Further, in the above description, the example in which the fiber is wound around the rotor of the motor has been described . However, even when winding a wire or the like around another work, for example, a coil of a transformer, the disconnection failure is reduced. A similar effect can be obtained. According to the fiber winding device of the present invention, the control unit that adjusts the tension of the tension applying unit based on the measurement result of the tension measuring unit sets the difference between the measured tensions within a predetermined tension difference. , The dispersion of the tension of each fiber is reduced, and the tension of each fiber can be brought close to each other, so that the tension of each fiber is stable and the fibers are uniformly distributed over the entire circumference of the rotor. Since the fiber can be wound, breakage of the fiber can be prevented, and the winding time of the fiber can be reduced to improve the productivity. Further, the winding quality can be improved .

BRIEF DESCRIPTION OF THE 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 flowchart of a reference example using the fiber winding device according to the present invention. It is a flowchart of the real施例fiber winding apparatus according to the present invention; FIG. FIG. 4 is an explanatory view illustrating a fiber guide portion of the fiber winding device according to the present invention. FIG. 5 is an explanatory diagram illustrating an arrangement of a fiber guide portion 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. [Description of Signs] 10 Fiber winding device, 12 fibers (fine fiber), 14
Bobbin, 16 bobbin support, 18 resin impregnation tank, 20
Rotor (work), 22 fiber winding section, 24 motor,
26a, 26b, 26c Guide rollers, 34 tension measuring section, 36 control section, 38 fiber guide section, 40 roller section.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01F 41/06

Claims (1)

(57) [Claim 1] In a fiber winding device for simultaneously winding a plurality of fine fibers around a work, a plurality of bobbins around which the fine fibers are wound are rotatably supported. A bobbin supporting portion, a tension applying portion connected to each bobbin supporting portion and applying a predetermined tension to the thin fiber drawn from each bobbin, and a fine fiber having a predetermined tension and drawn from the bobbin wound around the work Fiber winding section, a plurality of tension measuring sections for measuring the tension of each fine fiber, and the tension difference between the two small diameter fibers measured by the tension measuring section.
If the tension difference is larger than the predetermined tension difference,
Predetermined tension difference by reducing tension of large-diameter small-diameter fiber
A fiber winding device , comprising: a control unit for performing tension application adjustment for adjusting within a force difference .