JPH0728520B2 - Winding machine tension control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention <Field of Industrial Application> The present invention relates to a tension control device for a winding machine for applying a tension to a wire drawn toward the winding machine.

<Prior Art> An apparatus for winding a rotor of a motor is provided integrally with a spindle so as to extend radially outward, as proposed in Japanese Patent Application No. 1-71368. With the extended flyer arm, the wire is wound around the core teeth of the rotor by rotating the flyer arm while pulling the wire from the free end of the flyer arm toward the winding machine. There is. Further, in order to prevent the slack of the wire during the winding work, it is preferable to perform the winding work while constantly generating tension on the wire by the winding tension generator, as disclosed in, for example, Japanese Patent Laid-Open No. 2-219442. As shown in the above, there is a method in which an electromagnetic powder clutch is connected to a rotating body around which a wire is wound, and the current is controlled to generate an appropriate braking force to generate tension in the wire. .

By the way, after the hooking to the riser, the wire is wound around the core teeth a predetermined number of times to complete one operation of the winding. However, in the case where the entire winding work is applied with a certain appropriate tension, , At the start of winding, the wire will be extended from the riser toward the core teeth,
The wire may be scratched. Further, at the end of the winding, there is a problem that the wire is pulled out excessively due to the deceleration of the flyer arm and becomes slack.

<Problems to be Solved by the Invention> In view of the problems of the prior art as described above, the main object of the present invention is to improve the winding for improving the quality by appropriately changing the tension of the wire. To provide a tension control device for a machine.

[Structure of the Invention] <Means for Solving the Problems> According to the present invention, an object of the present invention is to provide a winding machine configured to perform winding by rotating a rotating arm while feeding a wire. Variable tension generating means capable of applying an arbitrary amount of tension to the drawn wire, and the tension of the wire is made relatively weak at the start of winding, and the tension of the wire is started at the time of continuous winding of the winding. And a control means for controlling the variable tension generating means so that the tension of the wire is made stronger at the end of winding than at the time of continuous winding of the winding. This is accomplished by providing a tension control device.

<Operation> By doing so, the tension of the wire at the start of winding is relatively weakened, so that the wire is prevented from being scratched by the riser, which would be stretched toward the core teeth after being hooked by the riser. At the same time, since the tension of the wire at the end of the winding is made relatively higher than the tension at the time of continuous winding of the winding, the wire is easily pulled out by decelerating the flyer arm as a rotating arm at the end of the winding. In this case, loosening of the wire can be prevented.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing a winding device 1 for a rotor of a motor to which the present invention is applied. The wire 3 wound around the rotor 2 of the motor is supplied from the right side in the direction of the arrow A in the figure, and is wound around the rotor via the tension generator 4 and the winding machine 5. Has become.

The winding machine 5 has a spindle 6 that is appropriately rotated and driven by a drive device (not shown), and a flyer arm that is provided integrally with the spindle 6 and that extends outward in the radial direction as a rotary arm. Further, the winding machine 5 is provided with a cylindrical wire guide 8 coaxially with the spindle 6 and relatively rotatable. The wire 3 is guided toward the flyer arm 7 via the wire guide 8,
The free end of the flyer arm 7 is pulled out into a core slot between adjacent core teeth 9 of the rotor 2. In the winding machine 5 configured in this way, the rotor 3 is fixed and the spindle 6 is rotated to rotate the wire 3
Can be wound around the core teeth 9.

The tension generator 4 has, for example, a pulley 4a around which the wire 3 is wound, and an electromagnetic powder clutch 4b connected to the pulley 4a. This electromagnetic powder clutch 4b
Is the pulley 4a according to the current controlled by the controller 10.
It is designed to be able to generate braking force.

In addition, a detection sensor 11 is fixedly mounted on a mount (not shown) of the winding machine 5, and a dog 12 is fixed to the spindle 6, and the dog 12 rotates as the spindle 6 rotates. The rotation speed can be detected by the detection sensor 11. The detection signal as the detection means configured as described above is input to the control device 10.

Next, the operation procedure in this embodiment will be described below with reference to the time chart shown in FIG.

After the preparatory operation for performing the winding work on the rotor 2 of the motor is completed, the flyer arm 7 is appropriately moved in the forward and reverse directions by a spindle motor (not shown) as shown in the left side portion of FIG. 2, for example. Rotate to drive hooking to the riser. After the hooking work is completed, the positioning operation before the winding operation is performed, and after the positioning operation is completed, the wire 3 to the core teeth 9 of the rotor 2 is
Winding work.

The winding work is performed by rotating the flyer arm 7 around the rotor 2 a predetermined number of times which has been previously input to the control device 10. The number of rotations is counted by the detection sensor 11 and the dog as described above. It is supposed to be done by 12 and. At the start of the winding operation, the current of the powder clutch 4b is set to a relatively small set value L, that is, the tension of the wire 2 is set to a relatively weak state, and the winding operation is started. At the time of continuous winding in which the wire 3 is wound a plurality of times around the core tooth 9, the current is set to a set value M larger than the set value L, and the wire 2 is wound in an appropriate tension state. Then, before the end of the winding operation, the current is set to a set value H larger than the set value M at the time of continuous winding of the winding, and a large tension is generated in the wire 2 to end the winding operation. These current setting values can be changed by the control device.
The number of rotations of the flyer arm 7 according to the signal of the detection sensor 11 read in 10 indicates that when the winding is started, when the winding is continuously wound,
Then, the control device 10 determines that the rotation speed data that has been input in advance in accordance with the end of the process matches. When performing the winding work on the next core tooth, the corresponding hooking operation is started, and the winding work on the rotor 2 of the motor is sequentially repeated in the same manner.

In this way, when the wire 2 is pulled out from the hooked riser portion toward the core teeth 9 by relatively weakening the tension of the wire 2 at the start of the winding operation after the hooking work is completed. It is possible to prevent the wire 2 from being damaged by the riser. Next, during continuous winding of the core teeth 9 for a predetermined number of times,
Since the winding is performed while generating a certain appropriate tension, it is possible to perform the appropriate winding while preventing the looseness. At the end of the winding, the flyer arm 7 is decelerated, so that the wire 3 is pulled out excessively and easily loosens. However, at the end of the winding, the control current of the powder clutch 4b is increased to make the tension of the wire 3 relatively. The wire 3 can be strengthened and the phenomenon that the wire 3 is pulled out can be prevented. Therefore, it is possible to prevent looseness of the wire 3 at the end of winding, and it is possible to perform high quality winding without looseness.

The change of each current value of the powder clutch 21 is an example,
By appropriately changing the design values such as the magnitude of the current value and the timing, it is possible to perform high-quality winding work according to the rotors of various motors. Further, the clutch means may be of any type capable of variably controlling the transmission torque, and is not limited to the powder clutch, and for example, an eddy current type clutch may be used.

[Effects of the Invention] According to the present invention, as described above, by adjusting the tension of the wire in each process of the winding work, the riser portion damages the wire at the start of the winding and the winding end. It is possible to suitably prevent loosening of the winding state at times,
High quality winding can be performed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a winding device to which the present invention is applied. FIG. 2 is a view showing a time chart of winding work based on the present invention. 1 ... Winding device, 2 ... Rotor, 3 ... Wire, 4 ...
Tension generator, 4a ... Pulley, 4b ... Powder clutch,
5 ... Winding machine, 6 ... Spindle, 7 ... Flyer arm, 8 ... Wire guide, 9 ... Core teeth, 10 ...
Controller, 11 …… Detection sensor, 12 …… Dog

Claims (1)

[Claims] 1. A variable tension generating means capable of applying an arbitrary amount of tension to a wire drawn toward a winding machine configured to perform winding by rotating a rotating arm while feeding the wire. At the start of winding, the tension of the wire is made relatively weak, at the time of continuous winding of the winding, the tension of the wire is made stronger than at the start of the winding, and at the end of the winding, the tension of the wire is continuously wound. A tension control device for a winding machine, comprising: a control means for controlling the variable tension generating means so as to be stronger than that during rotation.