JP2013021137A - Tensioning device for winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tensioning device for a winding machine which allows for precise winding of a wire around a wound body by preventing damage on the coating of the wire while tensioning the wire.SOLUTION: The tensioning device 100 for a winding machine comprises a pressing transfer mechanism 20 including a rotatable tension roller 22 having an electromagnetic brake 21, and a press roller 23 which feeds a wire 1 to a winding tension roller 32 by rotating in a direction opposite from the tension roller 22 according to the rotational speed thereof, while pressing the wire 1 against the outer peripheral surface of the tension roller 22.

Description

  The present invention relates to a tension applying device for a winding machine that applies tension to a wire in accordance with the movement of a nozzle in a coil winding machine.

In the coil winding machine, tension is applied to the wire to suppress the vibration of the wire and improve the positioning accuracy with respect to the winding frame.
Thereby, the coil can be formed in alignment with a predetermined shape.
When the tension is too large, there is a problem that the wire is broken or stretched, so that it is desirable to maintain a predetermined pulling force on the wire.
As an example of a device that applies tension to a wire, for example, a device as disclosed in Patent Document 1 has been proposed.

JP-A-6-255484

In Patent Document 1, a structure in which tension is applied by an electromagnetic brake is shown.
The magnitude F2 of the tension generated in the electromagnetic brake portion is a value obtained by dividing the brake torque Tb by the pulley radius Rp (described later, Equation 1).
Further, when the primary tension by the wire guide is F1, the condition that no slip occurs between the wire and the pulley is that the winding angle of the wire to the pulley is θ and the friction coefficient between the wire and the pulley is μ. From "Theory", the following equation 2 is obtained.
F2 = Tb / Rp (Formula 1)
F2 <F1 · exp (μ · θ) (Formula 2)
In order to correctly apply the predetermined tension by the electromagnetic brake, it is necessary that the wire and the pulley do not slip. In order to apply a larger tension without causing slipping, there are the following measures.
(1) Increase the primary tension F1.
(2) Increase the coefficient of friction between the wire and the pulley.
(3) Increase the winding angle of the wire and pulley.
According to Patent Document 1, the primary tension F1 is generated by sandwiching a wire using a wire guide.

In the mechanism for pinching the wire, tension is applied by sliding friction between the wire and the wire guide.
An insulating coating such as enamel is present on the surface of the wire.
Therefore, it is necessary to devise so that the coating is not damaged by sliding friction.
The tension F1 is given by the following expression 3 by the pinching force N and the friction coefficient μ2.
F1 = μ2 · N (Formula 3)
Here, if N is increased in order to increase the tension F1, there is a problem that the wire is deformed.
Further, if μ2 is increased, there is a problem that the wire coating is damaged due to slippage between the wire and the wire guide.

  The present invention has been made to solve these problems, and provides a tension applying device for a winding machine that can reduce the probability of wire deformation and coating damage and can apply a greater tension to the wire. The purpose is to do.

A tension applying device for a winding machine according to the present invention is:
In a tension applying device of a winding machine provided with a winding tension mechanism that winds a wire around a winding tension roller provided with a rotation resistance applying mechanism, and applies tension to the wire by the rotation resistance of the winding tension roller.
A rotatable tension roller equipped with a rotation resistance applying mechanism and a tension roller that winds the wire by rotating in the opposite direction to the tension roller according to the rotation speed of the outer peripheral surface while pressing the wire between the outer peripheral surface of the tension roller and pressing the wire And a pressure conveying mechanism having a pressure roller to be fed to the machine.

A tension applying device for a winding machine according to the present invention is:
A rotatable tension roller equipped with a rotation resistance applying mechanism and a tension roller that winds the wire by rotating in the opposite direction to the tension roller according to the rotation speed of the outer peripheral surface while pressing the wire between the outer peripheral surface of the tension roller and pressing the wire Since it is equipped with a pressure conveying mechanism that has a pressure roller to be sent to
Sufficient tension can be applied to the wire by the tension roller and the pressure roller.

Further, no slip occurs between the wire and the winding tension roller and the winding tension roller, and the maximum tension applied to the wire can be increased.
Further, since the wire does not slide and friction with each component, a sufficiently high tension can be applied to the wire without damaging the insulating coating of the wire.

It is a perspective view of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is the attachment schematic diagram of the wire constructed in the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is a perspective view of the press conveyance mechanism of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is a front view of the press conveyance mechanism of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is a side view of the press conveyance mechanism of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is a perspective view, a front view, and a side view of a winding tension mechanism of a tension applying device for a winding machine according to Embodiment 1 of the present invention. It is a perspective view, a front view, and a side view of another winding tension mechanism of the tension applying device for a winding machine according to the first embodiment of the present invention. It is a figure which shows the example of arrangement | positioning of the winding tension roller of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 1 of this invention. It is the attachment schematic diagram of the wire constructed in the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 2 of this invention. It is the attachment schematic diagram of the wire constructed in the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 3 of this invention. It is a cross-sectional schematic diagram of the mechanical brake 60 of the tension | tensile_strength provision apparatus of the winding machine which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
Embodiment 1 of a tension applying device for a winding machine according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a tension applying device 100 (hereinafter, referred to as a device 100) of a winding machine.
FIG. 2 is a schematic diagram of attachment of the wire 1 installed on the apparatus 100.
The wire 1 is supplied to the apparatus 100 from a wire drum (not shown) installed on the right hand side of the drawing.

FIG. 3 is a perspective view of the press conveyance mechanism 20 of the apparatus 100.
FIG. 4 is a front view of the press conveyance mechanism 20.
FIG. 5 is a side view of the press conveyance mechanism 20.
The pressing and conveying mechanism 20 includes a tension roller 22 connected to the rotating shaft of the electromagnetic brake 21, a pressing roller 23, and the like.
The wire 1 is sandwiched between the tension roller 22 and the pressing roller 23 and passes between them. At this time, the tension roller 22 and the pressure roller 23 rotate in the opposite directions to each other at the same speed.
The pressing roller 23 is a rotatable roller, and is connected to a cylinder 25 that moves up and down via a linear guide 24.
By operating the cylinder 25 up and down, the pressing force of the pressing roller 23 against the tension roller 22 can be adjusted.
Then, tension is applied to the wire 1 by the pressing force of the pressing roller 23 and the braking force of the electromagnetic brake 21 as a rotation resistance applying mechanism, and control is performed so that the wire 1 does not slip.
Further, the outer peripheral surface of the tension roller 22 is processed with rubber or silicon to prevent the wire from slipping.

FIG. 6A is a perspective view of the winding tension mechanism 30.
FIG. 6B is a front view of the winding tension mechanism 30.
FIG. 6C is a side view of the winding tension mechanism 30.
The winding tension mechanism 30 includes an electromagnetic brake 31 and a winding tension roller 32 connected to the rotating shaft of the electromagnetic brake 31.
Both the tension roller 22 described above and the winding tension roller 32 described below have the same function in that a tension is applied to the wire 1.
However, the winding tension roller 32 is different from the previous tension roller 22 in that the wire 1 is wound and tension is applied by the frictional force between the roller surface and the wire 1 and the braking force of the electromagnetic brake 31.

The wire 1 that has passed through the pressing and conveying mechanism 20 is on a straight line connecting the upper end of the pressing roller 23 of the pressing and conveying mechanism 20 and the lower end of the winding tension roller 32 of the winding tension mechanism 30 and has a winding tension. It is guided to a lateral hole of the guide 7 provided in the immediate vicinity of the roller 32.
Then, the wire 1 is wound around the winding tension roller 32 from the lower side in a clockwise direction over an angle corresponding to approximately 3/4 rounds.
Since the outer periphery of the winding tension roller 32 is a groove, the wire 1 does not come off.
Further, the outer peripheral groove surface of the winding tension roller 32 is processed with rubber or silicon to prevent the wire from slipping.

FIG. 7A is a perspective view of the winding tension mechanism 40.
FIG. 7B is a front view of the winding tension mechanism 40.
FIG. 7C is a side view of the winding tension mechanism 40.
The winding tension mechanism 40 includes a servo motor 41 serving as a rotation resistance applying mechanism and a winding tension roller 42 connected to the rotation shaft of the servo motor 41.
The wire 1 is provided on the straight line connecting the right end portion of the winding tension roller 32 and the left end portion of the winding tension roller 42 through the vertical hole of the guide 7 described above and in the vicinity of the winding tension roller 42. Guided to the vertical hole of the guide 10.

Then, the wire 1 is wound around the winding tension roller 42 counterclockwise from the left end toward the angle corresponding to approximately 3/4 round.
Thereafter, the wire 1 is supplied to the wound body through a nozzle (not shown) through the horizontal hole of the guide 10.

Next, tension applied to the wire 1 will be described with reference to FIG.
The tension F1 generated in the wire 1 by the tension roller 22 of the press conveying mechanism 20 is
When the friction torque by the electromagnetic brake 21 is τ1, and the radius of the tension roller 22 is r1, it is expressed by the following equation.
F1 = τ1 / r1

Next, the tension F2 generated by the winding tension roller 32 of the winding tension mechanism 30 is expressed by the following equation when the friction torque by the electromagnetic brake 31 is τ2 and the radius of the winding tension roller 32 is r2.
F2 = τ2 / r2

At this time, using the winding angle θ 2 of the winding tension roller 32 and the friction coefficient μ 2 between the winding tension roller 32 and the wire 1, the following condition is set according to Euler's belt theory.
F2 ≦ F1 · exp (μ2 · θ2)
By controlling the value of τ2 so that the value of F2 satisfies this condition, the occurrence of slippage between the winding tension roller 32 and the wire 1 can be prevented.

Similarly, the tension F3 generated by the winding tension roller 42 of the winding tension mechanism 40 is expressed by the following expression when the friction torque by the servo motor 41 is τ3 and the radius of the winding tension roller 42 is r3.
F3 = τ3 / r3

At this time, using the winding angle θ3 of the winding tension roller 42 and the friction coefficient μ3 between the winding tension roller 42 and the wire 1, the following condition is set by Euler's belt theory.
F3 ≦ (F1 + F2) · exp (μ3 · θ3)
By controlling the value of τ3 so that the value of F3 satisfies this condition, the occurrence of slippage between the winding tension roller 42 and the wire 1 can be prevented.

As a result, the tension applied to the wound body is the sum of F1, F2, and F3.
In addition, as long as each condition setting is satisfied, the wire 1 and each tension roller perform relative motion due to rolling, and no sliding motion occurs.

In this embodiment, the tension applied to the wire 1 is adjusted by using the electromagnetic brake 31 for the winding tension mechanism 30 and the servo motor 41 for the winding tension mechanism 40.
This is because the adjustment by the servo motor 41 allows finer control than the adjustment by the electromagnetic brake 31.
However, depending on the wire thickness and type, the electromagnetic brake may be used alone, or the servo motor may be used alone.

The pressing force of the cylinder 25 and the rotation resistance of the electromagnetic brake 31 and the servo motor 41 are applied as follows.
(1) First, an appropriate pressing command is temporarily output to the cylinder 25 with the wire 1 sandwiched between the tension roller 22 and the pressing roller 23.
(2) Next, an appropriate braking command value is output to the electromagnetic brake 21.
(3) The wire 1 is pulled out manually, and the tension applied to the wire 1 at this time is measured.
(4) Based on the measured tension, the desired values are obtained by increasing or decreasing the previous command values.
(5) Next, the wire 1 is wound around the winding tension mechanism 30.
(6) An appropriate command for giving rotational resistance to the winding tension mechanism 30 is given.
(7) The wire 1 is pulled out manually and the tension applied to the wire 1 is measured.
(8) Based on the measured tension, the command value applied to the winding tension mechanism 30 is increased or decreased to obtain a desired tension.
(9) Next, the wire 1 is wound around the winding tension mechanism 40 and the command value to be given to the servo motor 41 is set in the same manner.

FIG. 8 is a view showing another arrangement example of the winding tension roller.
The arrangement of the winding tension roller is not limited to the arrangement described above, and may be an arrangement as shown in FIG. Further, the winding tension roller is not limited to two, and may be three or more.

  In order to increase the winding angle of the wire 1 around the winding tension rollers 32 and 42 within the installation space of the same apparatus 100, the winding of the wire 1 around the winding tension roller 32 and the winding tension roller 42 is as follows. It is advantageous to draw a figure of 8.

According to the tension applying device 100 for a winding machine according to the first embodiment of the present invention, sufficient tension can be applied to the wire 1 by the tension roller 22 and the pressing roller 23.
Further, no slip occurs between the wire 1 and the winding tension roller 32 and the winding tension roller 42, and the maximum tension applied to the wire 1 can be increased.
Moreover, since the wire 1 does not slide and friction with each component, a sufficiently high tension can be applied to the wire 1 without damaging the insulating coating of the wire 1.

Embodiment 2. FIG.
Hereinafter, a second embodiment of a tension applying device for a winding machine according to the present invention will be described with reference to the drawings, focusing on portions different from the first embodiment.
FIG. 9A is a schematic view of the attachment of the wire 1 installed on the tension applying device of the winding machine.
The order of handling the wires 1 shown in FIG. 9A is exactly the same as in the first embodiment.
In the present embodiment, an intermediate roller 50 is provided between the winding tension roller 232 and the winding tension roller 242.
When this intermediate roller 50 is used, for example, two winding tension rollers are used as shown in FIG. 9A, or the wire 1 is directly guided from the intermediate roller 50 to the nozzle as shown in FIG. 9B. The operation without using the attached tension roller 242 can be performed.

When various coils are wound by using the same winding machine, the size of the coil, the thickness of the wire, and the tension applied depending on the wire material are various.
In the first embodiment, the tension is adjusted using a pressing roller, an electromagnetic brake, and a servo motor. However, in order to greatly change the tension to be applied, it is effective to adjust the number of winding tension rollers to be used. .

  According to the tension applying device for a winding machine according to the present embodiment, it is possible to easily change the tension greatly only by providing the intermediate roller 50 between the winding tension rollers to cope with various wire rods.

Embodiment 3 FIG.
Hereinafter, a third embodiment of a tension applying device for a winding machine according to the present invention will be described with reference to the drawings, focusing on the differences from the first embodiment.
Fig.10 (a) is a schematic diagram of attachment of the wire 1 installed in the tension applying device of the winding machine.
In this embodiment, moving rollers 350 and 351 are provided so that the winding angle of the wire 1 wound around each winding tension roller can be adjusted.
As shown in FIG. 10B, the winding angle of the wire 1 with respect to each winding tension roller can be easily adjusted by moving the moving rollers 350 and 351 left and right.
By increasing the winding angle of the wire 1, the tension that can be applied to the wire 1 can be significantly increased.

Embodiment 4 FIG.
Hereinafter, a tension applying device for a winding machine according to a fourth embodiment of the present invention will be described with reference to the drawings, focusing on the differences from the first embodiment.
FIG. 11 is a schematic sectional view of the mechanical brake 60.
In this embodiment, a tension is applied to the wire 1 using a mechanical brake 60 instead of an electromagnetic brake or a servo motor.
The winding tension roller shaft 63 is rotatably supported by a housing 61 filled with a viscous fluid 64.
Splashes are attached to the shaft 63 in the housing 61, and rotational resistance is generated by receiving the viscous fluid 64 during rotation.

According to the mechanical brake 60 according to Embodiment 4 of the present invention, a constant braking force can be ensured with a simple structure.
Thereby, a low-cost winding machine tensioning device can be provided.

r1, r2, r3 radius, F1, F2, F3 tension, 20 pressure transport mechanism,
21, 31 Electromagnetic brake, 22 tension roller, 23 pressure roller,
24 linear guide, 25 cylinder, 30, 40 winding tension mechanism,
32, 42, 232, 242 Winding tension roller, 41 Servo motor,
7,10 guide, 50 intermediate roller, 350,351 moving roller,
60 Mechanical brake.

Claims (10)

In a tension applying device of a winding machine provided with a winding tension mechanism that winds a wire around a winding tension roller provided with a rotation resistance applying mechanism, and applies tension to the wire by rotation resistance of the winding tension roller.
A rotatable tension roller provided with a rotation resistance applying mechanism, and while pressing the wire on the outer peripheral surface of the tension roller with the wire sandwiched between them, it rotates in the opposite direction to the tension roller according to the rotation speed of the outer peripheral surface. A tension applying device for a winding machine, comprising a pressing and conveying mechanism having a pressing roller for feeding a wire to the winding tension roller. The tension applying device for a winding machine according to claim 1, wherein the pressing force of the pressing roller is adjustable. The tension applying device for a winding machine according to claim 1 or 2, comprising a plurality of winding tension mechanisms. The tension applying device for a winding machine according to claim 3, wherein the wire is sequentially wound around each of the winding tension rollers of the plurality of winding tension mechanisms in an 8-shaped form. The tension applying device for a winding machine according to any one of claims 1 to 4, further comprising a moving roller that makes the winding angle of the wire relative to the winding tension roller variable. The tension applying device for a winding machine according to claim 3 or 4, wherein an intermediate roller is disposed between the plurality of winding tension rollers. The tension applying device for a winding machine according to any one of claims 1 to 6, wherein each of the winding tension roller and each rotation resistance applying mechanism provided in the tension roller is a servo motor or an electromagnetic brake. The tension applying device for a winding machine according to any one of claims 1 to 7, wherein a braking force of each rotation resistance applying mechanism is variable. The tension applying device for a winding machine according to any one of claims 1 to 6, wherein each of the winding tension roller and each rotation resistance applying mechanism provided in the tension roller is a mechanical brake. The tension applying device for a winding machine according to any one of claims 1 to 9, wherein the winding tension roller or at least one outer peripheral surface of the tension roller is subjected to rubber processing or silicon processing.

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