SU1147489A1 - Arrangement for separating ferromagnetic sheets from stack - Google Patents

Abstract

A DEVICE FOR SEPARATION OF FERROMAGNETIC SHEETS FROM THE FOOT, contains a trolley with a bracket (LN CX) with fig. sheets and having additional electromagnets, characterized in that, in order to increase the reliability of separating a specified number of sheets by stabilizing the magnetic fields and the interaction force between the fields of the electro-magnetic rollers and the dissector, The device is equipped with an interaction controller for magnetic fields, which has a software unit and a thyristor controller, which is electrically connected with the software unit and the electromagnets of the dissector.

Description

The invention relates to the mechanization of cold metal forming and can be used to separate ferromagnetic sheets from the foot. A device for separating ferroapp sheets from the foot is known, comprising a trolley with a bracket, an electromagnetic rotating roller mounted on a rotary shaft, a foot lifting mechanism, a sliding actuator of a moving actuator mounted on the carriage bracket and connected to the electromagnetic roller 1 shaft However, the known device cannot separate a specified number of sheets. The closest to the invention in terms of the Essential Features and the effect achieved is a device for separating ferromagnetic sheets from the foot, comprising a trolley with a brace, a roller mounted on it, carrying electromagnets, a lifting table for accommodating a sheet of sheets located under the roller, a divider mounted under the foot and having additional electromagnets 2. A disadvantage of the known device is the low reliability of separating a given number of sheets, since it is impossible to reduce one hundred ilnost boundary reaction magnetic fields and forces them to the reaction of oscillation of plate thickness. The purpose of the invention is to increase the reliability of separating a given number of sheets by stabilizing the boundary of the magnetic fields and the strength of the interaction of the fields of the electromagnet of the roller and the dissector. The goal is achieved by the device for separating ferromagnetic sheets from the foot, which contains a trolley with brackets, a roller mounted on it, carrying electromagnets, a lifting table for placing sheets of sheets, located under the roller, and a divider mounted under the foot of sheets and having additional electromagnets It is equipped with a magnetic field interaction regulator, having a program block and a thyristor regulator electrically connected with a program block and electromagnets of a divider. FIG. 1 shows a device for separating ferromagnetic sheets from a foot, a general view; in fig. 2 — magnetic interaction control regulator; in fig. 3 is a schematic diagram of a magnetic field interaction regulator; in fig. 4 - location of the boundaries of magnetic fields. The device for separating ferromagnetic sheets from the foot contains a driving carriage 1 with a carrier frame 2 on which the stack of sheets 3 is placed. On the bracket 4 of the driving carriage 1, an upper magnetic roller 5 is fixed. electromagnetic roller 7, rotational drive of electromagnetic rollers 5 and 7 (not shown) with the mechanism 8 for adjusting its position relative to the mechanism for lifting the foot 9 and the regulator 10 for the interaction of magnetic lei. The magnetic field interaction regulator is connected to the electric circuit of the press 11 n. It consists of a program block 12, which includes a pulse cell 13, a program cell 14, an actuator 15 and a phase shifter 16 with a resistor 17 electrically connected to the thyristor regulator 18. separation of ferromagnetic sheets from the foot works as follows. Before starting work, the stack of sheets 3 is laid on the frame 2 and the position of the upper magnetic roller 5 is adjusted relative to the stack of sheets using the adjustment mechanism 6 and the lower magnetic roller 7 by means of the mechanism 8. When the press (not shown) is turned on, the upper magnetic roller 5 prnt bends a given number of sheets and feeds them due to its rotation to the treatment zone, the lower magnetic roller 7 and its magnetic field rotate synchronously with the upper magnetic roller 5 and its magnetic field. At the moment of processing the sheet with a presso.m. its electric circuit 11, a command is sent to the pulse cell 13 of the software device 12 of the controller 10 of the interaction of magnetic fields, then the program cell 14 is sent, from there the command to lift the foot 3 is transferred by the foot lifting mechanism 9. the delay value of the time relay during which the drive of the actuator 15 rotates the drive of the resistor 17 of the phase shifter 16. A variable resistance value of the resistor 17 of the phase shifter 16 leads to a change in the angle оС of opening the thyristor in the thyristor controller 18. This, in turn, leads to a programmatic change in the electrical parameters of the lower electromagnet 7 and the restoration of magnetic fields. A sheet of sheets with a newly restored boundary between the fields is ready for the next sheet removal and moving it to the press by rotating the upper slug roller 5. The recovery of the fields after the next machining is repeated. At the moment of processing the sheet, a signal is sent to the pulse cell 13. In the pulse mode, the 1K relay switches on its contacts 2K and 3K, a software CT time relay, each of which is self-locking.

The engaging electromagnet Y and the motor turning the M of the actuator 15 are turned on. The motor turning the M rotates the resistor 2R (17) of the phase shifter. The varying resistance 2R leads to the value of the angle od (Fig. 4) of opening the thyristor VS, at which the boundary of the magnetic fields of the upper Y and the lower Yj of the electromagnets is established. The top sheet is picked up by the upper electromagnet. A current pulse through a trigger and an amplifier is fed to a 4K relay, which, with its 4 K contacts, resets the AC relay and the CT timer with a self-locking device. The motor M of the rotation of the actuator 15 is turned off, the position of the angle of rotation and the angle C, the opening of the thyristor VS is fixed. The engagement electromagnet Y of the actuator 15 is turned on. The 4K relay comes to its initial state.

The power supply circuit of phase shifter 16 is broken, thyristor VS is closed, the power on the lower electromagnet YZ disappears.

Upon further movement of the sheet in order to reduce energy consumption, the power supply to the upper electromagnet YI is turned off (Fig. 4). The transport is carried out by press grippers (not shown).

In order to exclude the operation of the 4K relay at the moment of applying power to the electromagnet YI in the circuit 2C, the trigger amplifier entered a CT contact with a delay time of 0.5 s.

When removing the next sheets the scheme works in the same way.

After the last sheet is transferred, the operation of the circuit is similar until the moment of receiving a pulse through the CT-2C circuit, a 4K trigger amplifier. Impulse is missing. The motor M of the actuator 15, rotating, acts on the switch SQ mounted in the turning mechanism. The SQ contacts break the power circuit of the 2K relay, which in turn shuts off the motor M and the electromagnet of the engagement of the actuator 15. Turning off the electromagnet power returns to the initial state of the rotation mechanism and the 2R resistor of the phase shifter 16. CT

The device is prepared for the separation of sheets of the next foot.

In the event of a disconnection of the electric energy in the process of dividing the sheets, the circuit returns to its original state. When power is applied, the power supply to the lower electromagnet Y is supplied earlier than in YI (Fig. 4).

The rotation mechanism 15 rotates the resistor 17 to the same value cAi, at which the boundaries of the magnetic fields are restored when the next sheet is taken from the foot. Then the cycle repeats, i.e. No adjustment of the device after an emergency power outage and its supply is required.

The effect of using the proposed device is to increase the reliability of separating a given number of sheets by stabilizing the magnetic field boundaries and the strength of the interaction of the fields.

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Claims (1)

A DEVICE FOR SEPARATING FERROMAGNETIC SHEETS FROM A STOP, comprising a trolley with an arm mounted on it, a roller mounted on it, carrying electromagnets, a lifting table for placing a stack of sheets located under the roller, and a divider mounted under the stack of sheets and having additional electromagnets, different heme that, in order to increase the reliability of separation of a given number of sheets by stabilizing the boundary of the magnetic fields and the interaction forces of the fields of the electromagnets of the roller and the divider, the device is equipped with regulator interaction of magnetic fields having a program unit thyristor and electrically connected to the programming unit and the electromagnets divider. FIG 7>