JPH0130748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stopping a high-speed winding machine, and more specifically, the present invention relates to a method for stopping a high-speed winding machine, and more specifically, the present invention relates to a method for stopping a high-speed winding machine, and more specifically, a method for stopping a high-speed winding machine, in which the thread runs between a rotating body that sets the thread speed and a bobbin winding beam, and the thread tension during winding is kept constant. This invention relates to an improvement in the method of operating a winder in which the rotational torque of the drive motor of the bobbin winding beam is controlled in order to maintain the rotational torque of the drive motor of the bobbin winding beam.

When winding yarn wound around a delivery beam onto a take-up beam in a winding process such as a sizing machine or warping machine, changes in yarn tension and yarn speed occur as the diameter of each winding beam changes. It is necessary to eliminate this and keep it constant. To do this, the yarn tension between the sending beam and a rotating body such as a roller that sets the yarn speed, and the yarn tension between the rotating body and the take-up beam are detected, and each detected yarn tension signal is is fed back to the control circuit of the pincushion beam drive motor,
By controlling the rotational torque of each drive motor, the yarn tension and thus the yarn speed are kept constant.

By the way, recently there has been a trend towards higher yarn speeds in the winding process, and machine speeds have increased significantly. Accordingly, repair work becomes difficult unless the time required to stop the rotation of the machine in the event of an accident such as thread breakage is shortened as much as possible.

Therefore, in order to shorten the stopping time, it is sufficient to increase the braking torque (negative torque), so it is sufficient to increase the capacity of these drive motors. However, if this is done, the capacity during steady operation will be too large, and the efficiency of the drive motor during steady operation will become extremely poor. Furthermore, a motor with a large capacity will have an exponentially large inertia and will lack quick response, making stable tension control, especially low tension control, difficult. However, with a drive motor whose capacity is commensurate with the output of steady-state operation, it is impossible to stop the rotation of the bobbin winding beam in a short time even if braking is applied with the maximum control torque that it can output, and of course it is impossible to adjust the thread tension. It becomes possible. Furthermore, even if the capacity of these drive motors is increased, if the thread tension is kept constant through feedback control, it will not be able to follow the rapid changes in thread tension that occur when a sudden stop occurs due to the slow response. On the one hand, it is difficult.

Furthermore, in the case of a winding machine that uses only a friction brake for braking, it is virtually impossible to adjust the brake during braking, and therefore only a constant braking force can be applied during braking. Therefore, it was not possible to control the thread tension using this method.

In this way, adjusting the rotational torque of the bobbin winding beam drive motor using the feedback method or using a friction brake for braking cannot be used to adequately control the thread tension during sudden stops. Can not. This causes the thread tension to change significantly, causing problems such as damage to the thread. In addition, if the thread tension of the thread wound around the thread winding beam becomes uneven in this way, there is a problem in that accidents such as thread breakage during subsequent weaving and uneven dyeing during dyeing are likely to occur.

This invention was made in view of the above circumstances,
The purpose of this system is to make it possible to suddenly stop the thread winding beam without increasing the capacity of the drive motor even when the thread speed is increased, and to keep the thread tension stable without fluctuation even during the stopping operation of the thread winding beam. do.

Therefore, in the present invention, in the winding machine having the basic structure described above, friction brakes for rotation control are provided for all the rotating bodies and the bobbin winding beam, and when the winding machine starts to stop, the thread tension can be controlled while taking advantage of feedback control. It is characterized by simultaneously operating two friction brakes.

The present invention will be described in detail below using the accompanying drawings.

The first embodiment in which this invention is applied to a warp sizing machine is as follows.
Shown in Figure 2. In FIG. 1, the warp yarns Y on the delivery beam 1 reach the drying cylinders 5 to 7 via the guide roller 2, rotating roller 4, and support roller 3, and then are wound onto the take-up beam 10 via the support rollers 8 and 9. ing.

Next, a tension feedback control system using drive motors for the delivery beam 1 and the take-up beam 10 will be explained. The sending beam 1 and the take-up beam 10 are driven by motors M1 and M3, respectively. And between the delivery beam 1 and the rotating roller 4, a drying cylinder 5
Tension detectors 11 and 12 are provided between the winding beam 10 and the winding beam 10, respectively.
2, the sending-off and winding tension of the warp Y are detected respectively.

The outputs of the tension detectors 11 and 12 are input to the control circuit shown in FIG.
1, 12 and the control circuit to send out the warp Y,
A feedback control system for the winding tension is formed, and as will be explained below, the delivery and winding tension of the warp yarns Y are controlled to a constant value. That is, the outputs of the tension detectors 11 and 12 are amplified by the amplifier 21 and then input to the summing point C1. Summing point C1
The output of the tension setter 22, in which the sending or winding tension of the warp yarn Y is set, is also input, and the summing point C1 outputs a signal with a value corresponding to the difference between the two inputs to the PID controller 23. . and P.I.D.
The output of the controller 23 is input to the summing point C2, and is output to the motors M1 and M3 via the amplifier 24.

A part of the current that is input to the motors M1 and M3 via the amplifier 24 is also input to the summing point C2 via a resistor 25, so that the current value output from the summing point C2 to the motors M1 and M3 is Feedback is controlled.

Further, the rotating roller 4 and the drying cylinders 5 to 7 are driven by a motor M2, and the delivery and winding speeds of the warp yarns Y are determined by the rotational speed of the motor M2. In the following description, the clockwise and counterclockwise torques generated by the motors M1 to M3 in FIG. 1 will be referred to as positive torque and negative torque, respectively.

Next, the brake system will be explained. Motor M1
Disc brakes B1 to B3 are attached to drive shafts M11, M21, and M31 of ~M3, respectively. The disc brakes B1 to B3 are pneumatically driven, and the disc brakes B1 and B3 have flow rate regulators 13 and 14 and check valves 15 and 16, respectively.
The disc brake B2 is connected to the electromagnetic solenoid valve 17 via the electromagnetic solenoid valve 17, and the disc brake B2 is connected to the electromagnetic solenoid valve 18. The electromagnetic solenoid valves 17 and 18 are connected to air sources S1 and S2, respectively, and when the delivery beam 1, rotating roller 4, drying cylinders 5 to 7, and winding beam 10 are decelerated, the electromagnetic solenoid valves 17 and 18 are connected to air sources S1 and S2, respectively. Fluid is supplied from the air sources S1 and S2 to the disc brakes B1 to B3 via 18, and the drive shafts M11, M21, and M31 are braked. In addition to this, the brake system includes braking using negative torque generated by motors M1 to M3, as described below.

The operation of this embodiment, which has the following configuration, is shown in Figure 3A.
This will be explained using ~D. In addition, in Figure 3, ON,
OFF indicates the operating and non-operating states of the brakes B1 to B3, respectively. or stop period, refers to acceleration period, refers to steady operation period, and refers to sudden stop period, respectively.

When the machine is stopped, the brake B2 is in operation (FIG. 3C), and the rotating rollers 4 and drying cylinders 5-7 are locked.

Also, in this state, the drive motor M is
1 and M3 are controlled, and the negative or positive torque generated by the drive motors M1 and M3 applies torque to the bobbin winding beams 1 and 10 counterclockwise or clockwise in FIG. Tension is controlled to be constant.

When the machine starts operating, the valve of the electromagnetic solenoid valve 18 is switched, and until then the brake B2
Since the compressed air that had been added to the
, and the braking of the drive shaft M21 of the motor M2 is released.

Further, the motor M2 starts operating, the rotating roller 4 and the drying cylinders 5 to 7 start rotating, and the machine starts operating. Then, during the acceleration period, the rotation of the motor M2 gradually increases, and at this time, the change in tension of the warp yarns Y is detected and the tension feedback system of the motors M1 and M3 is activated, so that the rotation of the motors M1 and M3 also gradually increases. This state continues until the transition to steady operation.

During the regular operation period, when the winding warp of the bobbin winding beams 1, 10 changes and the warp tension changes slightly, the tension feedback system of the drive motors M1, M3 is activated, and the rotation of the drive motors M1, M3 ( As the speed/torque is adjusted, the warp tension remains constant. Naturally, the rotational speeds of the drive motors M1 and M3 also change.

When thread breakage occurs, the electromagnetic solenoid valves 17, 1 are activated by the action of a brake control circuit (not shown).
Since the valves No. 8 are switched, compressed air is supplied from the air sources S1 and S2 to the brakes B1 to B3, and the brakes B1 to B3 are operated (FIGS. 3B to A). At the same time, the motor M2 is controlled by the control circuit of the motor M2.
2 generates constant negative torque. In this way, since braking is applied together with the braking force generated by the brake B2, the rotation roller 4 and the drying cylinders 5 to 7 are
The rotation of motor M2 can be reduced more rapidly during the sudden stop period than when only motor M2 is operated.

Moreover, since the brakes B1 and B3 are also activated at the same time as the brake B2 is activated, and a predetermined amount of braking is applied to the delivery beam 1 and the take-up beam, even if the rotating roller 4 and drying cylinders 5 to 7 are about to be stopped suddenly, , during the sudden stop period, the difference between the circumferential speed of the rotating roller 4 and the drying cylinders 5 to 7 and the circumferential speed of the delivery beam 1, as well as the difference in the circumferential speed of the rotating roller 4 and the drying cylinders 5 to 7.
The difference between the circumferential speed of No. 7 and the circumferential speed of the winding beam 1 is less than that of the conventional case without sudden stopping.
(Of course, if it is not lower than that, brake B
1. All you need to do is strengthen the braking force of B2. ) It is well known that if a circumferential speed difference occurs, tension fluctuations will occur in the warp yarns between them, but as mentioned above, the circumferential speed difference is less than that of the conventional case without sudden stopping, so these A pincushion beam (sending beam 1,
Take-up beam 10) The drive motor can be of conventional small capacity, or even smaller in some cases.

The fact that tension fluctuations can be absorbed means that the tension remains uniform, and the fact that the tension fluctuations can be absorbed means that the tension remains uniform and
10 means that the rollers rotate and suddenly stop in synchronization with the rotating roller 4, etc., which are stopped rapidly.

In addition, since the brakes B1, B2, and B3 are friction brakes whose braking force is not significantly affected by the machine speed during braking, the braking force does not change much during the stopping process of the winder, and as a result, The thread tension during the stopping process becomes dramatically uniform and stable.

Motor M2, sending beam 1, take-up beam 1
Furthermore, when the rotation of the rotating roller 4 and drying cylinders 5 to 7 has completely stopped, the electromagnetic solenoid valve 17 is activated by the action of a brake control circuit (not shown).
, the compressed air that had been applied to the brakes B1 and B3 is transferred to the flow regulators 13 and 14.
The brakes B1 and B are released into the atmosphere through
3 is inactive.

When the stop is completed, the warp sending force is the interaction force between the braking force of brake B1 and the rotational torque of motor M1, and the winding tension is the interaction force between the braking force of brake B3 and the rotational torque of motor M1.
They are each kept constant by the interaction force with the rotational torque of No. 3. For this reason, if the braking by the disc brakes B1 and B3 is immediately released immediately after the completion of stopping, the above-mentioned interaction force changes suddenly, and the warp tension tends to temporarily fluctuate greatly. To prevent this, the flow regulator 1 is installed as shown by the dotted lines in Fig.
If the operation of the disc brakes B1 and B3 is gradually released by adjusting the brakes 3 and 14, the rotational torque of the motor will also gradually change, thereby making it possible to prevent the warp tension from fluctuating immediately after the stop is completed.
On the other hand, in order to prevent rotation of the rollers 4 and drying cylinders 5 to 7 when there is a difference between the sending force and the winding tension of the warp Y, the brake B2 is kept in an operating state even during the stop period after the stop is completed. Further, during the stop period, the thread tension is maintained constant by the tension feedback system of the motors M1 and M3 as described above.

In the above explanation, the warp threads wound around the delivery beam are wound onto the take-up beam via a drying cylinder, but the invention is not limited to this and is generally applicable to high-speed delivery and take-up devices. Needless to say, it can be used for

As described above, according to the present invention, at the start of a sudden stop, the rotary body that sets the yarn speed and the friction brake provided on the bobbin winding beam are activated simultaneously, thereby reducing the time required for stopping the winding machine. In addition, there is no need to use a large drive motor for the pincushion beam as in the conventional case, and it is sufficient to use one that is suitable for the output during steady operation. Therefore, the inertia of the motor can be reduced, responsive control is possible, and energy loss during steady operation can be reduced. In addition, it is possible to suppress fluctuations in the yarn feeding and winding tension from the start of braking to the completion of the stop in the event of a sudden stop and keep it constant, thereby preventing damage to the yarn due to tension fluctuations or a decrease in operating efficiency due to the stop. can. In addition, even though the system includes feedback control that is extremely sensitive to disturbances, the brake force that causes large disturbances is applied from outside the control system, so it is possible to avoid the effects of large disturbances. Furthermore, since a friction brake is used, the braking force does not change much even if the machine speed changes, and therefore there is also the advantage that there is little change in yarn tension and it is easy to perform feedback control.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing an embodiment when used in a warp sizing machine of the present invention, FIG. 2 is a circuit diagram showing a warp tension feedback system of motors M1 and M3 in the embodiment, and FIG. Figures A to D are graphs showing the operating state and the operating state of each brake in the example. 1... Sending beam, 5-7... Drying cylinder,
10... Winding beam, 11, 12... Tension detector, M1-M3... Motor, B1-B3... Disc brake.

Claims (1)

[Scope of Claims] 1. Yarn travels between a rotating body that sets yarn speed and a bobbin winding beam, and the output of a motor that detects yarn tension and drives the bobbin winding beam in order to keep the yarn tension constant during winding. In a winding machine having a feedback system for controlling rotational torque, friction brakes for rotational control are newly installed on all of the rotating bodies and the bobbin beam, and the friction brakes are actuated by commands from sources other than the feedback system.
A method for stopping a high-speed winding machine, which is characterized in that when the winding machine starts to stop, the friction brakes are operated simultaneously while keeping the above-mentioned feedback system alive. 2. The method according to claim 1, wherein the brake is gradually released after braking is completed.