JPS6115015B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for controlling a winder used in a steel bar or wire rod mill.

In the conventional winding machine control device, it is necessary to control the winding machine to stop at a certain position, and this is for the following reasons.

That is, after the winding machine finishes winding, the wound material is transferred by a transfer device, and the state at this time is shown in FIG. In FIG. 5, 7 is a transfer device, 8 is a fork-shaped protrusion, and 9 is a transfer device.
9 is the bottom plate of the winder, 9a is the notch, and 10 is the wound material. When winding of the material is completed, the transfer device 7 moves forward with respect to the bottom plate 9, and the fork-shaped protrusion 8 enters the notch 9a. Then, the transfer device 7 ascends as it is to receive the material 10 from the winder, and then retreats as it is to transfer the material 10 to another location. Therefore, the winding machine must be stopped at a certain position so that the notch 9a of the bottom plate 9 and the fork-shaped protrusion 8 of the transfer device 7 are aligned well when winding is completed. Must be.

Such control is performed by, for example, as shown in FIG. 2, stopping a protrusion A provided on the winding machine 1 when the position detector 4 detects it. More specifically, while the winder 1 is winding the material, the winder 1 is connected to the gear 2 by the electric motor 3.
When winding is completed, a deceleration start command is given to the control unit 5, and in response to this command, the control unit 5
The electric motor 3 is controlled so that the winder 1 rotates at a predetermined inching speed. And the detector 4 is the protrusion A
When detected, a detection signal is sent to the control section 5, whereby the electric motor 3 is stopped, and the winding machine 1 is stopped at the target position.

However, depending on the position of the protrusion A when the deceleration start command is given, the winder 1 may stop after approximately one revolution at the inching speed, and it takes a considerable amount of time to stop. There was a drawback of doing so.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and there is no need to rotate the winder at an inching speed after winding is completed, and the winder is decelerated immediately after approaching the target position. It is an object of the present invention to provide a control device for a winding machine that can stop the winding machine at a target position by stopping the winding machine.

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 2, numeral 1 is a winding machine, 2 is a gear,
3 indicates an electric motor. The position detector 4 generates pulses corresponding to the position of the winder 1, and therefore the position of the winder 1 can be detected by counting these pulses. Further, in order to detect the rotational speed of the winder 1, a speed detector 5 is provided which generates pulses corresponding to this rotational speed. In this example, the position detector 4 and the speed detector 5 are configured to operate based on the rotation of the shaft of the electric motor 3, but signals may also be taken out from the winder 1. The output signals of the position detector 4 and the speed detector 5 are then supplied to the control section 6.

The control unit 6 includes a position detector 4 and a speed detector 5.
The motor is comprised of a calculation section 61 that performs a predetermined calculation upon receiving a stop command signal based on the output signal of , and an output section 62 that supplies a control signal to the electric motor 3 based on the calculation result. That is, the calculation section 61
When a stop command is received, the angle required for the winder 1 to start decelerating and stop (this is is the rotation angle θ or deceleration angle θ). For example, if the target stop position of the winder 1 is α degrees and the deceleration start position is γ degrees, the winder 1 can be It will stop correctly at the target position.

Now, when the speed of the winder 1 when receiving the stop command is V ₀ (rps), the deceleration rate is constant (A
(rps/sec)), the rotation angle θ of the winding machine 1 from the start of deceleration to the time of stopping can be obtained by the following equation.

In other words, the winding machine 1 has V ₀ ² /2A since the first deceleration.
× Rotate 360 (degrees) and stop. Therefore, if a stop command is issued when the current position of the winding machine 1 is β (degrees), the winding machine 1 will stop at the position β+θ (degrees). This position is the stop target position α
If we start decelerating at a position γ that is equal to
As the relationship is shown in FIG. 3, the winder 1 will stop at the target position α. That is, it is sufficient to issue a deceleration command to the winding machine 1 at an angle γ that satisfies the following conditions: γ+θ=α+360°×n ∴γ=α−θ+360°×n (0≦γ≦360°). This kind of calculation is
Preset deceleration characteristics and position detector 4
The deceleration command is performed by the calculation unit 61 based on the output signal of the speed detector 5 and the output signal of the speed detector 5, and a deceleration command is issued to the electric motor 3 from the output unit 62.

Here, the calculation unit 61 of the control unit 6 will be explained based on FIG. 4. The calculation unit 61 includes the counter 11,
Reset pulse generator 12, deceleration angle calculator 13,
It is composed of a deceleration command generator 14. The pulses emitted by the position detector 4 are counted by a counter 11 to determine the angle of the winding machine.When the angle reaches 360 degrees, a reset pulse generator 12 is activated to determine the angle of the winding machine. generate a reset pulse for 11,
The counter 11 is designed to return to 0°.

On the other hand, the speed V ₀ (rps) of the winding machine is input from the speed detector 5 to the deceleration angle calculator 13, and the deceleration angle θ (0≦θ<360°) is determined by the above calculation formula. The deceleration command generator 14 inputs this deceleration angle θ and the target stop position α degrees, and compares this with the output of the counter 11 (angle of the winder). Then, when these angles match, that is, when the angle of the winder reaches γ in the above equation, a deceleration command is generated.

In the above embodiment, the target position is 1 of the winder.
Although the case where the rotation is at one location is shown, it is clear that the same operation can be obtained even if there are two or more locations.

As described above, according to the present invention, the deceleration angle from the start of deceleration to the stop is determined based on the deceleration rate determined in advance, and the deceleration angle until the target stop position is compared with the current rotation angle. Since this determines the position at which the winder starts deceleration, there is no need to slowly rotate the winder at an inching speed as in the conventional case, and it becomes possible to stop the winder at the target position in a short time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional control device for a winding machine, FIG. 2 is a block diagram of a control device according to an embodiment of the present invention, and FIG. 3 shows a diagram showing the reference position and target stop position of the winding machine. An explanatory diagram showing the relationship, Figure 4 is the second
FIG. 5 is an explanatory diagram for explaining some of the constituent elements in the figure, and FIG. 5 is an explanatory diagram for explaining the necessity of stopping the winding machine at a fixed position. 1... Winder, 2... Gear, 3... Electric motor, 4
... Position detector, 5 ... Speed detector, 6 ... Control unit, 11 ... Counter, 13 ... Deceleration angle calculator,
14... Deceleration command generator, 61... Arithmetic unit, 62
...Output section.

Claims (1)

[Claims] 1 a position detector that detects the current position of the winder;
a counter that counts pulses output from the position detector to determine the current rotation angle of the winder;
a speed detector that detects the rotational speed of the winding machine;
a deceleration angle calculator that calculates a deceleration angle from the beginning of deceleration to a stop based on the detected rotational speed and a predetermined deceleration rate; A control device for a winding machine comprising a deceleration command generator that compares a deceleration angle with a current rotation angle of the winding machine and issues a deceleration command when these angles match.