JPS6116704B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic winding machine that winds a material to be wound, such as paper, wound around an unwinding drum onto a winding drum that is rotationally driven by contacting the outer periphery of a drive drum. This invention relates to an acceleration/deceleration control method.

Paper rewinding machines in the paper manufacturing industry are configured to wind paper wound around an unwinding drum onto a winding drum that is driven to rotate by contacting the outer periphery of a drive drum. In order to perform winding in a constant state, the tension of the unwinding drum is controlled to be constant. In conventional installations, constant tension control is achieved by controlling the mechanical braking state of the unwinding drum. However, with the mechanical brake of such conventional equipment, the speed of the paper being wound is
At 1,500 m/min or less, it was possible to maintain a constant tension, but recently the winding speed has been increased to increase productivity, for example, at 2,500 m/min.
When the speed reaches such a speed, there is a problem that constant tension control becomes impossible. That is, when increasing the winding speed, it is necessary to satisfy two conditions: increasing the winding speed quickly in order to increase operational efficiency, and keeping the tension constant even during acceleration and deceleration. In order to accelerate, the unwinding drum must go from a braking state to a motoring state, but if only mechanical brakes are used, motoring is impossible because the maximum control torque is zero. be. In such a case, the acceleration torque to accelerate the unwinding drum with the brake released can be obtained by applying tension above the limit to the paper, but if the moment of inertia of the unwinding drum is large, the acceleration torque will be quite large. If a tension exceeding the limit is applied to the paper, the paper may break.
Therefore, in order to solve these problems, it is conceivable to provide an electric braking device to the unwinding drum so that it can be used not only in a braking state but also in a motoring state. However, since such an electric braking device requires a drive motor etc. and a power source, simply providing this electric braking device significantly increases the cost of the winding machine drive device, for example, by 50%.

In view of the above, an object of the present invention is to provide an automatic acceleration/deceleration control method for a winding machine that allows the winding machine to wind at high speed without significantly increasing costs.

According to the present invention, this purpose is to calculate the outer diameter of the unwinding drum using a simple calculation circuit, and to calculate the outer diameter of the unwinding drum according to the calculated outer diameter of the unwinding drum until the set speed of the winding machine is reached. Alternatively, this can be achieved by selecting the acceleration/deceleration time until stopping.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 shows an embodiment of a device for carrying out the automatic acceleration control method for a winding machine according to the present invention.
FIG. 2 shows a time chart of the device shown in FIG. 1, FIG. 3 is a control circuit block diagram of the drive motor controlled by the present invention, and FIG. 4 is an explanation of speed control of the drive motor according to the present invention. The figure shows.

In FIG. 1, 1 is an unwinding drum, 2 is a material to be wound 3, 4 is a driving drum, 5 is a winding drum, 6, 7
is a pulse transmitter, 8 is a drive drum diameter setting device, 9 is a multiplication circuit, 10 is a division circuit, 11, 12, 13 is an unwinding drum outer diameter setting device, 14, 15, 16 is a comparator, 17, 18, 19 and 20 are flip-flop circuits, 21 is an AND circuit, 22 is a pulse generator, and 23 is a start switch. In such a configuration, the unwinding drum outer diameter setting device 11,1
2 and 13 are set to stepwise setting values. Note that the set values are set so that 11>12>13. In addition, flip-flop circuits 17, 18,
19, 20 each output OUT1, OUT2, OUT3,
The acceleration/deceleration time is selected by OUT4, and the drive motors (not shown) of the drive drums 3 and 4 are controlled. Note that the output of the flip-flop circuit 17
OUT1 may select a constant low speed instead of the acceleration/deceleration time.

The operation of the apparatus shown in FIG. 1 will be explained based on the time chart shown in FIG. First, the diameters of the drive drums 3 and 4 are set in the drive drum diameter setting device 8.
In addition, unwinding drum outer diameter setting devices 11, 12, 13
Set step-by-step settings. These set values are predetermined values. After these settings are made, when the start switch 23 is operated, a start signal as shown in FIG. 2a is sent to the pulse generator 22.
added to. This start switch 23 is operated at the start of winding. The pulse generator 22 receives this start signal and outputs a reset signal PLS ₂ as shown in FIG. 2d to the flip-flop circuits 18 and 1.
It is sent to the reset terminals 9 and 20 and the set terminal of the flip-flop circuit 17. As a result, flip-flop circuits 18, 19, and 20 are reset, and only flip-flop circuit 17 is set. Therefore, based on the output OUT1 of the flip-flop circuit 17, the drive drums 3 and 4 are driven at a predetermined acceleration. This acceleration is a low value. Winding is started by driving the drive drums 3 and 4, and the pulse generators 6 and 7 generate a pulse Pr corresponding to the rotational speed of the drive drum 3 and the unwinding drum 1.
A pulse Pu is sent out according to the rotational speed of the motor. The pulse Pr sent out from the pulse transmitter 6 is added to the multiplier circuit 9 to set the set value of the drive drum diameter setting device 8.
Multiplied by Dr. The multiplication value Pr×Dr obtained as the output of the multiplication circuit 9 is added to the division circuit 10 and divided by the pulse Pu from the pulse oscillator 7. The pulse number ratio between the pulse Pr from the pulse generator 6 and the pulse Pu from the pulse generator 7 is inversely proportional to the outer diameter ratio of the drive drum 3 and the unwinding drum 1. Therefore, the division value Du=Pr×Dr/Pu obtained as the output of the division circuit 10 indicates the outer diameter of the unwinding drum 1.

A division circuit 10 indicating the outer diameter of this unwinding drum 1
The output Du is applied to one input terminal of the AND circuit 21. The other input terminal of the AND circuit 21 is applied with a pulse PLS ₁ sent out from the pulse generator 22 in synchronization with the pulse Pu from the pulse generator 7, as shown in FIGS. 2b and 2c. The calculations and comparisons performed in the apparatus shown in FIG. 1 at this time are performed as follows. First, as shown in the time chart of FIG. 2, the pulse generator 22 generates the pulse PLS ₂ in response to the start signal, sets the flip-flop circuit 17, and the drive drum is activated at the acceleration time selected by the output OUT1. The pulse generators 6 and 7 generate pulses by driving the
Generates Pr and Pu. The pulse generator 22 synchronizes with the pulse Pu and sends out the pulse PLS ₁ for one cycle period of the pulse Pu after a period of time necessary for the operation of the winding machine to stabilize after receiving the start signal. This pulse PLS ₁ is no longer sent out. In addition, the division in the division circuit 10 is performed by pulse Pu
The calculation can be easily performed by outputting Pr×Dr of the pulse interval. Therefore, the output Du is output from the AND circuit 21 only once and is applied to the comparators 14, 15, and 16. In the comparators 14, 15, 16,
The output Du of this dividing circuit 10 is compared with the setting value set in the unwinding drum outer diameter setting device 11, 12, 13, respectively, and the output Du is smaller than the setting value of the unwinding drum outer diameter setting device 11, for example. If it is larger than the setting value of the unwinding drum outer diameter setting device 12, only the flip-flop circuit 18 is set, and the output of this flip-flop circuit 18 is set.
The driving of the drive drums 3 and 4 is controlled by the acceleration time selected by OUT2, and the output Du is smaller than the setting value of the unwinding drum outer diameter setting device 12.
If it is larger than the set value of the unwinding drum outer diameter setting device 13, only the flip-flop circuit 19 is set, and the output of this flip-flop circuit 19 is set.
The drive of the drive drums 3 and 4 is controlled at the acceleration time selected by OUT3. Furthermore, the output Du
is smaller than the setting value of the unwinding drum outer diameter setting device 13, the output of the flip-flop circuit 20
The drive of the drive drums 3 and 4 is controlled at the acceleration time selected by OUT4. Next, the outputs OUT1 to OUT4 of each flip-flop circuit 17 to 20 are
A method of controlling the drive motors for the drive drums 3 and 4 based on the above will be explained with reference to FIG. In Figure 3, 3
-5 are the same as those shown in FIG. 1, furthermore, 24-27 are acceleration/deceleration time setters, and 28-31 are outputs OUT1-OUT of flip-flop circuits 17-20.
Switch circuit selected by OUT4, 32
3 is a speed setting device, 33 is a speed command generator, 34 is a speed regulator, 35 is a current regulator, 36 is a phase controller, 37 is a pulse amplifier, 38 is a thyristor conversion circuit, and 39 drives the drive drums 3 and 4. 40 is a current transformer that detects the current supplied to the motor 39, 41 is a diode, and 42 is a speed detector. Note that 34 to 37 indicate components of a general speed control device. In such a configuration, the acceleration/deceleration time setters 24-27 are set with acceleration/deceleration times according to the outer diameter of the unwinding drum 1, and the switch circuits 28-31 selected by the outputs OUT1-OUT4 The acceleration/deceleration time selected according to the operation is sent to the speed command generator 33. When the speed command generator 33 receives a driving command (not shown), the speed command generator 33 generates a selected acceleration/deceleration time setter 24 (not shown).
A speed command pattern for acceleration according to the acceleration/deceleration time from ~27 is output, and when the output of this speed command pattern reaches the speed command value from the speed setter 32, the speed command value from the speed setter 32 is output. Output. Furthermore, when there is no operation command (a deceleration command may also be used), the speed command generator 33 outputs OUT1~
Acceleration/deceleration time setter 2 selected by OUT4
A speed command pattern for deceleration according to the acceleration/deceleration times from 4 to 27 is output. Therefore, the fourth
In response to the driving command as shown in FIG. 4B, the speed command from the speed command generator 33 has a pattern as shown in FIG. 4A. In addition, in Fig. 4a, 24a, 25
a, 26a, and 27a are speed command patterns during acceleration corresponding to the acceleration time of the acceleration/deceleration time setters 24 to 27, respectively, and 24b, 25b, 26b, and 27b are the acceleration/deceleration time of the acceleration/deceleration time setters 24 to 27, respectively. The corresponding speed command pattern during deceleration is shown, and the pulses in FIG. 4b indicate the period during which the driving command is output. The output of the speed command generator 33 is compared with a signal corresponding to the rotational speed of the motor 39 from the speed detector 42, and the deviation thereof is added to the speed regulator 34. The speed regulator 34 outputs a set value of the current to be supplied to the motor 39 according to this deviation. This current set value is detected by a current transformer 40 and compared with the actual supply current value of the motor 39, which is sent via a diode 41, and the deviation is added to the current regulator 35. The current regulator 35 outputs a firing phase angle command for the thyristor conversion circuit to the phase controller 36 so as to eliminate this deviation. Since the system voltage is input to the phase controller 36, the thyristor conversion circuit 38 is controlled to fire at a predetermined timing according to the firing phase re-command from the current regulator 35 based on the phase of this voltage. The pulse is sent to the thyristor conversion circuit 3 via the pulse amplifier 37.
8 to control the supply current of the motor 39, the drive motors 3 and 4 are driven in accordance with the acceleration/deceleration time selected by the acceleration/deceleration time setters 24-27.

During deceleration, the winding length is detected by counting the number of pulses from the pulse generator 6, and when this length reaches a predetermined value (this predetermined value is
For example, it is the value obtained by subtracting the length to be wound from the start of deceleration to the stop from the set winding length. ) It is possible to automatically generate a deceleration command, automatically select a deceleration time corresponding to the acceleration time during acceleration based on the deceleration command, and perform deceleration at the selected deceleration time. In the present invention, the reason why the output Du is sent to the comparators 14, 15, and 16 only once is because
If the acceleration/deceleration speed is changed midway through the acceleration/deceleration period, the material to be wound on the winding drum 5 may be wound unevenly, or when the acceleration/deceleration speed is changed, the material to be wound may be wound. This is to prevent any adverse effects on winding due to changes in tension. Note that if the acceleration/deceleration time is set according to the outer diameter of the unwinding drum at the start of winding, the moment of inertia of the unwinding drum 1 decreases as winding is performed, so There is no increase in the tension applied to the interview. As described above, according to the present invention, the acceleration/deceleration time can be selected depending on the outer diameter of the unwinding drum 1. Therefore, when the outer diameter of the unwinding drum 1 is large and the moment of inertia is also large, the acceleration/deceleration can be performed slowly. However, when the outer diameter of the unwinding drum 1 is small and therefore the moment of inertia is small, it is possible to accelerate and decelerate quickly. In this way, even if an electric braking device is not provided, it is possible to increase operational efficiency without causing paper breaks by simply combining it with a conventional mechanical brake. Furthermore, the present invention is applicable not only to the paper winding machine described above but also to winding machines for steel lines and the like.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of a device for implementing the automatic acceleration/deceleration control method for a winding machine according to the present invention, FIG. 2 is a time chart of the device shown in FIG. 1, and FIG. 3 is a control according to the present invention. FIG. 4 is a block diagram of the control circuit for the drive motor, and is an explanatory diagram of the speed control of the drive motor according to the present invention. 1... Unwinding drum, 2... Material to be wound, 3, 4
... Drive drum, 5 ... Winding drum, 6, 7 ...
Pulse transmitter, 8... Drive drum diameter setting device, 9...
...Multiplication circuit, 10...Division circuit, 11, 12, 1
3... Unwinding coil outer diameter setting device, 14, 15, 1
6... Comparator, 17, 18, 19, 20... Flip-flop circuit, 24-27... Acceleration time setter, 28-31... Switch circuit, 32... Speed setting device, 33... Speed command generator , 34... Speed regulator, 35... Current regulator, 36... Phase controller, 37... Pulse amplifier, 38... Thyristor conversion circuit, 39... Motor, 40... Current transformer, 4
1...Diode, 42...Speed detector.

Claims (1)

[Scope of Claims] 1. In a winding machine configured to wind a material to be wound on a winding drum onto a winding drum which is rotationally driven by contacting the outer periphery of a drive drum, the above-mentioned method is provided at the start of winding. The outer diameter of the unwinding drum is calculated, the acceleration/deceleration time of the drive drum is selected according to the calculation result, and the drive of the drive drum is controlled based on the selected acceleration/deceleration time. Automatic acceleration/deceleration control method for a winder. 2. In the control method according to claim 1, each of the unwinding drum and the driving drum is provided with a pulse oscillator that generates a pulse according to the rotation speed, and the pulse oscillator that generates a pulse according to the rotation speed An automatic acceleration/deceleration control method for a winding machine, characterized in that the outer diameter of the unwinding drum is calculated from the product of the frequency ratio of pulses and the outer diameter of the drive drum. 3. In the control method according to claim 1 or 2, the calculated outer diameter of the unwinding drum is compared with a plurality of set values set in stages, and the control method is performed according to the results of these comparisons. An automatic acceleration/deceleration control method for a winding machine, characterized in that the acceleration/deceleration time of a drive drum is selected by