JPS6131700B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt material winding motor control device.

BACKGROUND ART In winding machines for belt-shaped materials such as plastic films and paper, it is an important technical issue to wind up the material quickly and without slippage.

By the way, in the conventional belt material winding machine, the rotation of the winding motor is controlled during the rising period α at the beginning of winding, as shown in Fig. 1.
It is divided into three stages: a constant speed period β and a stop period γ at the end of winding. And in the rising period α,
The strip material is wound very slowly at the beginning, becomes faster from the middle of the winding, and as the constant speed period β approaches, the winding acceleration becomes gentler. That is, there are places where the winding speed Rn suddenly increases, and this has the disadvantage that sideways vibration and the like are likely to occur. In addition, during the constant speed period β, since the winding motor maintains the maximum winding speed R, as the number of windings n increases, the winding circumferential speed also increases, which causes lateral wobbling, wrinkles, etc. There are drawbacks. Furthermore, during the stop period γ, the winding motor is controlled through a differential circuit.
For this reason, when changing from the constant speed period β to the stop period γ, the rotational speed of the take-up motor decreases rapidly, causing lateral sway or the like in the strip material.

In order to improve the lateral wobbling and wrinkles of the strip material, methods such as lowering the winding speed R during the constant speed period β have been adopted, but this method has the disadvantage that winding takes a long time. .

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and provide a belt-shaped material winding motor control device that can wind up a belt-shaped material accurately and quickly.

In order to achieve the above object, the present invention uses an arithmetic circuit that calculates Rn=(n/K)×R ₁ during the start-up period until the winding motor reaches the maximum winding speed.
The circumferential speed is constant after an arbitrary time after reaching the maximum winding speed, and during the stop period after an arbitrary time after the circumferential speed is constant.
Rn=R ₂ −{n-(N-D)} ² /(D/√ ₂ ) ₂
[However, Rn = winding speed, n = number of windings, K = constant, R ₁ = maximum winding speed, R ₂ = winding speed after an arbitrary time from constant circumferential speed, N = final number of windings, D This invention provides a belt material winding motor control device that is capable of calculating the number of stopped windings.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 2, 1 is an arithmetic circuit, and during the rising period until the winding motor 2 reaches the maximum winding speed _R1 , Rn=(n/K)× _R1 [However, Rn=
winding speed, n = number of windings, K = constant], and after reaching the maximum winding speed R ₁ and maintaining that speed for an arbitrary time, the circumferential speed of the strip material to be wound becomes a constant speed. For example, if there is one strip of material,
Calculate Rn = TR ₁ / (T + 20n) [where T = winding diameter just before constant circumferential speed, δ = thickness of the strip material],
Furthermore, during the stop period after maintaining a constant circumferential speed for an arbitrary time, Rn=R ₂ −{n−(N−D) ² }(D/√ ₂ ) ² [However, R ₂ = during the stop period after an arbitrary time from constant circumferential speed The previous winding speed, N=the final number of windings, and D=the number of stopped windings] are calculated. 3 is the maximum winding speed R ₁ ,
This is a memory circuit capable of storing the thickness δ of the strip material and the final number of windings N, and is connected to an arithmetic circuit 1 and is constituted by a microcomputer together with the arithmetic circuit 1. 4 is a converter that converts the digital output signal of the arithmetic circuit 1 into an analog signal.
5 is a first amplifying the output signal of this converter 4.
It's an amplifier. Reference numeral 6 denotes a clip limiter circuit for correcting high-speed and low-speed rotation of the take-up motor 2, and is connected to the first amplifier 5 to amplify the output signal. The first amplifier 5 is further connected to a second amplifier 7. This second amplifier 7 is connected to the winding motor 2 and can directly drive the winding motor 2. Reference numeral 8 denotes a tachogenerator, which is connected to the winding motor 2 and can convert the rotational speed of the winding motor 2 into voltage, which is negatively fed back to the second amplifier 7. 9 is a detection mechanism, which includes a rotation detection cam 10 connected to the winding motor 2, a sensor 11 such as a photoelectric switch or a magnetic switch that detects the rotation of this rotation detection cam 10, and a signal from this sensor 11 that is amplified. a third amplifier 12,
It is connected to the arithmetic circuit 1 so that the output signal of the amplifier 12 is input to the arithmetic circuit 1.

Next, the operation of the above embodiment will be described.

First, the maximum winding speed R ₁ , the thickness δ of the strip material, and the final winding number N are set and stored in the memory circuit 3. Based on the information from the memory circuit 3, a digital signal is transmitted from the arithmetic circuit 1 to the converter 4 such that the winding speed Rn of the winding motor 2 is proportional to the number of windings during the rising period α as shown in FIG. Ru. This digital signal is converted into an analog signal by a converter 4. The analog signal is amplified by the first amplifier 5 and the second amplifier 7 together with the correction signal from the clip limiter circuit 6, and is transmitted to the winding motor 2, so that the winding motor 2 rotates.
The rotation speed of this winding motor 2 is determined by the rotation detection cam 10.
The pulse signal counted by the sensor 11 is amplified by the third amplifier 12 and input to the arithmetic circuit 1. The winding speed Rn of the winding motor 2 increases in proportion to the number of windings n, and the maximum winding speed R ₁
When it reaches the constant speed period β, the winding motor 2 maintains the maximum winding speed _R1 for a certain period of time. This maintenance time is set before the occurrence of lateral sway, wrinkles, etc. in the strip material becomes noticeable. After a certain period of time has elapsed, the circumferential speed reaches a constant period β', and the winding speed Rn gradually decreases so that the circumferential speed of winding the strip material becomes constant. Then, in the stop period γ, the winding speed Rn of the winding motor 2 decreases without rapidly changing at the boundary with the peripheral speed constant period β'.
At this time, the number of stop windings D during the stop period γ is arbitrarily set in advance depending on the material of the strip material and the like.

That is, during the start-up period α, the winding speed Rm of the winding motor 2 increases in proportion to the number of windings n, so that a sudden increase in the winding speed Rm is prevented compared to when a conventional integrating circuit is used. can. Further, since the constant speed period β is set until the circumferential speed increases and the occurrence of lateral wobbling, wrinkles, etc. becomes noticeable, and then the constant circumferential speed period β' is set, an increase in the circumferential speed of the strip material can be prevented. Further, the transition to the stop period γ is gradual, unlike in conventional differentiating circuits. Therefore,
It can prevent lateral wobbling etc. in the winding width of the strip material,
Winding can be done reliably. Moreover, since various causes such as lateral vibration can be improved, the maximum winding speed can be made higher than before, the start-up period α and the stop period γ can be shortened, and the winding time can be made shorter than before.

As described above, according to the present invention, there is provided a belt material winding motor control device that can prevent winding defects and speed up the winding time.

[Brief explanation of the drawing]

Figure 1 is a graph of changes in winding speed with respect to the number of windings of a conventional winding motor, Figure 2 is a mechanical diagram of an embodiment of the present invention, and Figure 3 is a graph of changes in winding speed with respect to the number of windings of a winding motor according to the present invention. A graph of changes in winding speed is shown. 1... Arithmetic circuit, 2... Winding motor, 4... Converter, 9... Detection mechanism.

Claims (1)

[Claims] 1. In a strip material winding motor control device capable of winding a strip material by a winding motor, Rn
= (n/K)×R ₁ , the circumferential speed becomes constant after an arbitrary time after reaching the maximum winding speed, and during the stop period after an arbitrary time from constant circumferential speed, Rn=R ₂ −{n−(N−D)} ² /
(D/√ ₂ ) ²・[However, Rn = winding speed, n =
Number of windings, K = constant, R ₁ = maximum winding speed, R ₂ =
an arithmetic circuit that can calculate the winding speed after an arbitrary period of time from constant circumferential speed, N = final number of windings, D = number of stopped windings], and a signal from the arithmetic circuit that converts the signal to drive the winding motor. 1. A belt-like material winding motor control device, comprising: a converter capable of controlling the winding motor; and a detection mechanism capable of detecting the rotational speed of the winding motor and inputting an output signal to the arithmetic circuit.