SU439328A1 - Device for software control of the varietal winder - Google Patents

Description

one

The device for controlling the stacker winder stacker is in the field of rolling mill production and can be used while winding the wire on the winder of small section and wire mills.

A device for software control of a varietal winder is known, comprising a pulse length sensor of coiled metal, a software setting device made as a series of temporary resistances connected to a power source using individual contactless switches switched as a function of the length of the wound material.

The main disadvantage of this device is the use of the tachogenerator of the last stand of the mill as a power source of resistance P1YX with their contactless keys, because this leads to the fact that the most critical circuits of electronic equipment - power circuits - are connected to electrical lines widely distributed in the workshop interferences in which disrupt the normal functioning of electronic equipment.

The reliability of the proposed device for software control of the varietal winder stacker is increased due to the fact that it contains a source of constant voltage to which the software variable variable resistances with their keys, a transformer and a transistor, whose base is connected to the output of a single-oscillator controlled by a pulse sensor, are connected in series

the length of the coiled material with a frequency proportional to the speed of movement of the coiled material, and the rectified secondary voltage of the transformer forms the driving signal for the speed regulator of the coiler stacker.

The drawing shows the block diagram of the described device.

The device for software control of the varietal winder stacker contains a pulse sensor 1 of the length of the material connected to the shaft of the follower rollers 2 through which the coiled material 3 enters the carrier 4 and the drum 5. The output of the sensor 1 is connected to the input of the binary counter 6; mode

The operation of the counter 6 is determined by the switch 7 and the encoder 8. The output of the counter 6 is connected to the input of a binary counter 9 controlling the decoder 10, each output bus of which controls a transistor switch 11 that connects a variable resistance 13 to the power source 12 in series with the primary winding of the transformer 14 and the transistor 15. The transistor 15 is controlled by a single-oscillator 16. The secondary voltage of the transformer 14 is rectified by the strand Miguel 17 and is released at the resistance 18 as a program signal, which compares aets with voltage tachogenerator 19 mounted on the motor shaft 20 stacker. The voltage difference enters the amplifier 21, which controls the excitation winding current 22 of the generator 23.

The device works as follows.

The coiled material 3, passing through the last stand of the mill or the follower rollers 2 and rotating the carrier 4, is placed in the drum 5 of the winder with flat backing layers. The formation of coils of the helix is achieved by controlling the speed of the carrier relative to the drum as a function of the rolling speed, the diameter of the rolled-up wire rod, and the length of the metal entering the coiler. The adjustment is carried out discretely as one enters the coiler of elementary sections of length into which each layer of the laid material is divided. The number of elementary areas in the layer is chosen the same for all diameters of the material being laid.

A pulse length sensor 1, associated with the shaft of the last stand of the mill or with the shaft of follower rollers 2, provides information about the length of the material entering the coiler as a sequence of pulses. Information pulses are fed to the input of a binary counter 6, the mode of operation of which with the help of switch 7 and encoder 8 is programmed so that the signal at its output corresponds to the input to the coiler of the elementary length segment. The switch 7 serves to select the conversion factor 6 required for laying the coiled material of a given diameter.

The signals from the output of the counter b are fed to the input of the binary counter 9, counting the number of elementary sections included in the winder. The capacity of the counter is equal to the number of elementary areas in the two layers of material laid in the drum. Since the dynamic stacking mode of the even and odd layers is not the same (dragging in the carrier in one case and its acceleration in the other), the carrier velocity is programmed for both modes.

The counter 9 controls the decoder 10, extracting signals corresponding to the sequence number of the elementary portion currently entering the coiler.

The number of output tires of the decoder 10 is equal to the number of elementary areas in the length of two adjacent metal layers. The output signal on each PCB exists during the laying time of the corresponding section number. Each output bus of the decoder controls a transistor switch AND, which connects to the power source 12 a variable resistance 13 in series with the primary winding of the transformer 14 and a transistor 15. The power source and 12 are common to the entire electronic equipment of the device.

A trailer 15, together with a transformer 14, converts a constant voltage into a variable, the value of which is proportional to the value of a variable resistance 13 — the number of the section to be laid, and the modulation frequency of the transistor 15, the proportion of the unwinding speed of the unwound metal.

The latter is achieved by the fact that the transistor 15 is controlled by a single-oscillator 16, which forms pulses with a constant amplitude and g duration, the duty cycle of which is proportional to the frequency of the information pulses from the sensor of length 1.

The secondary voltage of the transformer 14 is rectified by the rectifier 17 and allocated to the resistance 18 as a program signal.

The software voltage is compared to the voltage of the tachogenerator 19 mounted on the shaft of the stacker motor 20. The difference between the driving voltage and the feedback voltage is amplified by the amplifier 21, which controls the excitation winding current 22 of the generator 23. The generator in turn controls the speed of rotation of the motor 20.

Subject invention

A device for software control of a varietal winder stacker, comprising successively installed winding material length sensor, associated with a metal cage feeding mechanism from a rolling stand, a programming unit made as a series of variable resistances connected to a power source using individual contactless switches switched in a function the length of the wound material, as well as the engine of the stacker, characterized in that, in order to increase the reliability of the device, it is equipped with a constant voltage source control unit, to which the software control unit is connected in series, the primary winding of the transformer and the transistor, the base

 which is connected to the output of the one-shot, the input of which is connected to the output of the pulse sensor of the length of the coiled material with a frequency proportional to the speed of movement of the coiled material, and the secondary

0, the transformer winding is connected to a rectifier, giving a signal to its speed controller connected to the stacker motor, while the variable resistances are also connected to a constant voltage source.

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