JPH0833292A - Tension unit - Google Patents

Abstract

PURPOSE:To obtain a tension unit for imparting tension correctly in which tension can be switched automatically. CONSTITUTION:The tension unit comprises a tension pulley 2 about which a wire 11 is entrained tightly, a tension motor 3 having a rotor coupled with the tension pullet 2, and means for controlling the tension motor 3 to generate a predetermined torque reversely to the rotational direction of the rotor when the wire 11 is fed to the tension motor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension device,
In particular, the present invention relates to a tension device that can apply a proper tension to a wire rod by applying it to a winding device and obtain a stable winding.

[0002]

2. Description of the Related Art In recent years, winding devices have been required to be automated, to have high quality, to have high productivity, and the functions required for wire tension devices have been diversified.

A conventional tension device for a winding device will be described below.

In the conventional brake type tension device shown in FIG. 9, 41 is a wire rod, 42 is a pulley around which the wire rod 41 is wound, 43 is a supply direction of the wire rod 41, and 44 is a pulley 42.
Is the direction of rotation. The pulley 42 is coupled to a shaft 45 rotatably supported, and a brake shoe 46 for braking is externally fitted to the shaft 45. A taper member 47 and a taper member 47 for adjusting a pressure contact force of the brake shoe 46 with respect to the shaft 45. Adjustment knob 48 to adjust the position of
Is provided. Numeral 49 is a fishing rod for removing tarmi.

Next, the operation will be described. First, when the wire 41 is fed in the feeding direction 43, the pulley 4
2 rotates in the direction of rotation 44. At that time, contact friction is generated between the shaft 45 and the brake shoe 46, and a tension is applied to the wire 41 by a braking force in the rotation direction of the pulley 42. When adjusting the tension of the wire 41, the adjustment knob 48 is manually rotated to move the taper member 47. Then, the brake shoe 46 moves in pressure contact with or separates from the shaft 45, the contact friction changes, the braking force of the pulley 42 changes, and the tension is adjusted.

[0006]

However, in the above-mentioned conventional structure, the tension between the rotation start and the rotation of the pulley 42 is caused by the difference between the static friction coefficient and the dynamic friction coefficient between the shaft 45 and the brake shoe 46. However, there is a problem that the adjustment knob 48 must be manually rotated to change the tension.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a tension device which can always apply a proper tension stably and can automatically change the tension.

[0008]

A tension device according to a first aspect of the present invention supplies a wire rod to a motor, a tension pulley wound around a wire rod so as not to slip, a motor in which the tension pulley is connected to a rotor. And a torque control means for controlling the torque of the motor so as to generate a predetermined torque in a direction opposite to the rotation direction of the rotor during the rotation.

The tension device of the second invention of the present application is characterized in that the torque control means has a plurality of set values for torque control, and the set values are switched at an arbitrary timing by an external electric signal. And

The tension device of the third invention of the present application is characterized in that the torque control means is configured to synchronously switch the set value of the torque control according to the rotation angle of the wire rod supply target.

A tension device according to a fourth invention of the present application is a data storage means for storing, for each object, wire material supply data in which a set value of torque control is set corresponding to a series of wire material supply operations for the object. It is characterized in that it is provided with a wire rod supply data selecting means, and the torque control means is configured to switch the set value of the torque control according to the selected wire rod supply data.

The winding device of the fifth invention of the present application is characterized by including the above tension device.

[0013]

According to the tension device of the present invention, the motor is subjected to torque control to apply a stable predetermined torque to the tension pulley, so that the predetermined tension can be stably and reproducibly applied to the wire rod. Can be given.

Further, by switching the setting value of the torque control at an arbitrary timing, the optimum tension state can be always ensured even when the optimum tension changes. For example, individual winding operation, terminal processing, etc. can be performed. An optimum tension can be applied to the wire material to realize a stable series of winding operations.

Further, when the tension of the wire changes according to the rotation angle of the target object, for example, when the target object to be wound is a rectangle or the like, if the rotation speed of the target object is made constant, the target object will rotate depending on the rotation angle of the target object. Tension fluctuations occur at the feed end of the wire due to factors such as fluctuations in the wire speed and wire lead-out angle, but the tension fluctuations in the wire are alleviated by changing the torque control setting value in synchronization with the rotation angle of the target object. be able to.

Further, the wire rod supply data in which the set value of the torque control is set corresponding to a series of wire rod supply operations to the target object is stored for each target object, and the data can be selected so that the target object can be selected. A predetermined tension can be immediately applied with good reproducibility when switching objects.

By applying the above tension device to a winding device, a stable winding can be obtained.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a winding device will be described below with reference to FIGS.

FIG. 1 shows the appearance of the tension device 1 and a schematic view of the winding portion. In FIG. 1, the tension device 1 includes a tension pulley 2 in which a wire 11 is wound several times so as not to slip.
A tension motor 3 that is a servo motor that applies a rotational torque to the tension motor 3 and a guide roller 4 that guides the wire 11 to the tension pulley 2 are mainly configured. Reference numeral 5 is a rotation direction of the tension pulley 2, and 6 is a torque control direction of the tension pulley 2. 7 is felt, 8
Is a guide bar, and 9 is a guide roller at its tip. 1
Reference numeral 0 is a bobbin around which the wire rod 11 is wound.

In the winding part, 12 is a nozzle for drawing out the wire rod 11, 13 is a core which is an object of winding, 14 is a core chuck, 15 is a core rotary servomotor for rotating the core 13, and 16 is a timing. A pulley, 17 is a timing belt, 18 is a rotation direction of the core 13, and 19 is a supply direction of the wire 11.

FIG. 2 shows the overall structure of the winding device 20. The winding device 20 has a six-axis structure for efficient winding, and the tension device 1 is provided for each shaft.
It is configured so that the tension can be set individually.
Reference numeral 21 is an XYZ table for moving and positioning the nozzle 12, and 22 is a winding drum on which the core chuck 14 is arranged. The core 13 is supplied and taken out on the front side of the winding drum 22 to remove the winding drum 22. It is configured to rotate 180 ° and perform winding on the opposite side. Reference numeral 23 is a wire processing chuck that holds the end of the wire rod 11, and 24 is a cutter.

FIG. 3 shows a control system configuration of the winding device 20. Reference numeral 25 is a controller that controls the operation of the winding device 20, and includes the machine control unit 26 and the core rotation servomotor 1
An NC control unit 27 for driving and controlling the motor 5 and a torque control unit 28 for controlling the torque generated by the tension motor 3 are provided. Each of the control units 26 to 28 reads control data from the data memory unit 30 via the bus 29. Is configured.

FIG. 4 shows the configuration of the torque control unit 28. Torque command value T output from torque command value generating means 51
Is input to the current command value generating means 53 via the subtractor 52 for preventing abnormal high speed rotation when the wire rod 11 is broken. The current command value I output from the current command value generating means 53 is input to the current error amplifier 55 via a subtractor 54 that calculates an error from the feedback current value If, and the output of the current error amplifier 55 is the power amplifier 56. Is input to drive the tensioning motor 3. The current flowing through the tensioning motor 3 is detected by the current detector 57 and input to the subtractor 54 as the feedback current value If. Further, the rotation of the tension motor 3 is detected by the pulse generator 58,
The output signal is input to the differentiator 59, converted into the speed signal v, and input to the speed regulating means 60. When the tension motor 3 is rotated at a certain speed or more by the speed regulating means 60, a subtracter 52 outputs a control signal for canceling the torque command value.
Configured to output to.

A series of winding operations in the winding device 20 configured as described above will be described first with reference to FIG.
In the start line peeling process (a), the wire processing chuck 23 holds the end of the wire rod 11 led out from the nozzle 12, and the nozzle 12 spirals in the circumferential direction of the terminal pin 31 formed on the core 13. The wire 11 is twisted to the terminal pin 31 by rotating on the track. Next, in the start line cutting step (b), the cutter 24 cuts the wire rod 11 connected to the wire processing chuck 23 in the vicinity of the terminal pin 31. Next, in the first layer winding step (c), the moving amount of the nozzle 12 per one rotation of the core 13 is operated in a straight orbit corresponding to the diameter of the wire 11 so that the core 13 moves.
The wires 11 are aligned and wound. Next, in the second and subsequent winding steps (d), the same operation as that of the first layer winding is repeated up to the eighth to tenth layers to stack the wire material 11 on the core 13 and form the aligned winding. To do. Next, in the finish wire peeling step (e), the other terminal pin 32
On the other hand, the wire rod 11 is twisted by the same operation as the start line. Finally, in the finish wire cutting step (f), the wire rod 11 is gripped by the wire processing chuck 23, and the cutter 24 cuts the wire rod 11 near the terminal pins 32. FIG. 6 shows a state in which the wire material 11 is laminated on the core 13 and aligned and wound.

Next, the operation of the tension device 1 during the above winding operation will be described with reference to FIG. When the core 13 is rotationally driven in the rotation direction 18 by the core rotation servomotor 15, the wire rod 11 wound around the core 13 is led out from the nozzle 12 in the supply direction 19, and the wire rod 11 in the tension device 1 is accordingly accompanied. The tension pulley 2 wound several times so as not to slip rotates in the rotation direction 5. At this time, the torque control unit 28 of the controller 25 shown in FIG. 3 reverses the rotation direction 5 of the tension pulley 2 with respect to the tension motor 3 based on the tension set value stored in the data memory unit 30. Torque control is applied in the torque control direction 6 of. As a result, a suppressing force is applied to the rotation of the tension pulley 2, and the wire 11 is given a tension controlled to a predetermined value. In particular, since the torque is controlled by the electric control of the tension motor 3 to apply the tension,
A predetermined tension can be stably obtained.

Further, in the above series of winding operations, the start wire stripping step, each layer winding (a total of about 8 to 10 layers)
By setting the tension value suitable for each operation in the process and finish line peeling process individually in the data memory unit 30, the optimum tension is automatically adjusted according to the operation of the nozzle 12 and the winding operation. Can be switched to a stable laminated winding.

Next, a method of setting the tension set value at the time of winding stored in the data memory unit 30 will be described with reference to FIGS. 7 and 8 in the case of the cylindrical work 33 and the rectangular work 34.

In FIG. 7A, the cylindrical work 33
Cylindrical workpiece 3 when winding wire 11 by rotating
When the rotation speed of No. 3 is constant, the linear velocity of the wire rod 11 led out from the nozzle 12 is constant, the lead-out angle between the tip of the nozzle 12 and the wire rod 11 is constant, and the contact angle is constant. Wire rod 1 led out from nozzle 12, which is important for wire
The tension of 1 becomes constant. Therefore, FIG.
As shown in, the tension value of the tension device 1 is set constant regardless of the rotation angle of the cylindrical work 33.

On the other hand, in the case of the rectangular work 34, as shown in FIG. 8A, even if the rotation speed of the rectangular work 34 is constant, the linear speed of the wire 11 drawn out from the nozzle 12 is increased. Changes in conjunction with the rotation angle of the rectangular work 34, and the lead-out angle between the tip of the nozzle 12 and the wire 11 also changes in conjunction with the rotation angle of the rectangular work 34. From these things, the tension device 1 and the nozzle 1
If the tension of the wire rod 11 between the two is made constant, the tension of the wire rod 11 led out from the nozzle 12, which is important for the winding, will change in conjunction with the rotation angle of the rectangular work 34.

Therefore, as shown in FIG. 8B, the tension of the wire rod 11 led out from the nozzle 12 is made constant by changing the tension set value in the tension device 1 in synchronization with the rotation angle of the rectangular work 34. Which results in a stable aligned winding.

Furthermore, the target model for winding is switched,
When the number of revolutions of the core chuck 14 and the wire diameter of the wire rod 11 are changed and the tension set value of the tension device 1 needs to be changed accordingly, the data memory unit 30
The winding data that contains the optimum tension setting value for each winding process is stored in advance for each target model, and the tension can be switched immediately by selecting the winding data managed individually for each axis. Is configured to be able to. With this structure, as shown in FIG. 2, the more the number of axes, the more efficiently the tension can be switched in a short time, and the stable winding can be obtained.

[0032]

According to the tension device of the present invention, as is apparent from the above description, the motor is subjected to torque control so as to apply a predetermined torque to the tension pulley. The predetermined tension can be applied stably and with good reproducibility.

Further, by switching the setting value of the torque control at an arbitrary timing, it is possible to always ensure the optimum tension state even when the optimum tension changes. For example, individual winding operation, terminal processing, etc. An optimum tension can be applied to the wire material to realize a stable series of winding operations.

When the tension of the wire changes according to the rotation angle of the target object, for example, when the target object to be wound is a rectangle or the like, if the rotation speed of the target object is kept constant, the target object will rotate depending on the rotation angle of the target object. Although tension fluctuations occur at the feed end of the wire due to factors such as fluctuations in the wire speed and the lead-out angle of the wire, the tension fluctuations in the wire are alleviated by changing the torque control setting value in synchronization with the rotation angle of the target object. be able to.

Further, the wire rod supply data in which the set value of the torque control is set corresponding to a series of wire rod supply operations to the target object is stored for each target object, and it is made possible to select the data. A predetermined tension can be immediately applied with good reproducibility when switching objects.

Further, by applying the above tension device to the winding device, a stable winding can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a main part of a winding device to which a tension device according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view of the winding device according to the embodiment.

FIG. 3 is a schematic configuration diagram of a controller of the winding device of the embodiment.

FIG. 4 is a configuration diagram of a torque control unit in the controller of the embodiment.

FIG. 5 is an explanatory diagram of a winding step in the example.

6A and 6B show core windings in the same embodiment, FIG. 6A is a sectional view, and FIG.

FIG. 7 is an explanatory diagram of a method of setting a tension set value for a cylindrical winding target in the embodiment.

FIG. 8 is an explanatory diagram of a method of setting a tension set value in a rectangular winding target in the embodiment.

FIG. 9 shows a configuration of a tension device in a conventional example,
(A) is a perspective view, (b) is a longitudinal cross-sectional view, (c) is a CC cross-sectional view of (b).

[Explanation of symbols]

 1 Tension Device 2 Tension Pulley 3 Tension Motor 11 Wire Rod 13 Core (Target) 25 Controller 28 Torque Control Section 30 Data Memory Section

Front page continued (72) Inventor Kunihiro Nishiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A tension pulley in which a wire is wound so as not to slip, a motor in which the tension pulley is connected to a rotor, and a predetermined torque is generated in a direction opposite to the rotating direction of the rotor when the wire is supplied. And a torque control means for controlling the torque of the motor. 2. The torque control means has a plurality of torque control setting values and is configured to switch the setting values at an arbitrary timing by an external electric signal. Tension device. 3. The tension device according to claim 1, wherein the torque control means is configured to switch the setting value of the torque control in synchronization in accordance with the rotation angle of the wire rod supply target. 4. A data storage means for storing, for each object, wire material supply data in which a set value of torque control is set corresponding to a series of wire material supply operations for the object, and a wire material supply data selecting means. 2. The tension device according to claim 1, wherein the torque control means is configured to switch the set value of the torque control according to the selected wire supply data. 5. A winding device comprising the tension device according to claim 1, 2, 3 or 4.