SU1098633A1 - Device for automatic condition inspection of sheets - Google Patents

Abstract

DEVICE FOR AUTOMATIC SHEETING OF SHEETS containing the flaw detector electrically connected between itself, the first and second defect memory blocks, motion sensors and strip and sheet tracking registers, the position sensor of the cutting mechanism, the sheet presence sensor and the power supply unit of electromagnets, characterized in that the purpose of improving reliability by improving the accuracy of sheet scrapping and eliminating the constant monitoring and adjustment of parameters of signal sources, it is equipped with a pulse shaper, a transfer unit information, advance information register, frequency doubler, and an additional sheet maintenance register, with the pulse shaper connected by its input to the output of the second defect memory block, the first output to the first discharge input of the advanced register, and the second output to the information input of the transfer unit, the transfer unit is connected by one-by-one inputs to the corresponding one-by-bit outputs of the advanced register, and by one-by-outputs to the corresponding one-by-one inputs of the additional register spinning (L sheets frequency doubler connected to the sensor input motion sheets and advance vyhodomk clock input of the register, further register sheets accompanied clock input connected to the sensor motion sheets and vyhodomk control input electromagnets power supply. from 00 O5 00 oo

Description

The invention relates to the processing of metals by pressure and is intended to automate the process of sheet screening on the transverse cutting of metal. A device is known for the automatic screening of sheets, designed to work on the cutting lines, the cut sheets of which are transported under the rollers of the roller table or under the conveyor, kept in this state by electromagnets. To lay the sheets in the packing sections on such units, it is sufficient to momentarily turn off the corresponding electromagnets when the sheet approaches the laying position. Commands to the control circuit of electromagnets are supplied at different positions of the leading edge of the sheets relative to the laying position, depending on the transport speed of the latter. The device contains a switch that allows the operator to manually adjust the time when the control signal for the tripping electromagnets 1 is generated. A disadvantage of this device is the lack of an automatic functional dependence of the signal generation time of the controlling electromagnets on the sheet transport speed, which degrades the reliability of the device. The closest technical solution of the invention is a device for automatic sheet sorting, containing an electrically interconnected flaw detector, first and second defect memory blocks, motion sensors and strip and sheet tracking registers, a cutter position sensor, dates. ..... IMS "and ... mg ,, d.shikch sheet presence and power supply - electromagnets 2. and .. A disadvantage of the known device is the complexity of its implementation, requiring careful adjustment of parameters and their control during operation, which shoot down lv4y 1 I 1 vwilu J 11 lyv / Ll, (v, lyCIV kylUJ, H 1 W reliability of the device. This is due to the fact that the device uses analog sources for the shaping1 and signal, for the transmitting electromagnets ( tachogenerator, sawtooth generator) and means of machining (summator and comparator). The aim of the invention is to increase the reliability of the device by improving the accuracy of sheet marking and eliminating the constant monitoring and adjustment of parameters of signal sources in the course of time. that device containing the electrically interconnected flaw detector, the first and second defect memory blocks, motion sensors and strip and sheet tracking registers, the positioning mechanism of the cutting mechanism, the sheet presence sensor and the electromagnet power supply unit are equipped with a pulse driver, an information transfer unit, an information ahead register , a frequency doubler and an additional sheet maintenance register, while the pulse shaper is connected by its input to the output of the second defect memory block, by the first output to during the first discharge of the register of advance, and the second output - to the information input of the transfer unit, the transfer unit is connected by one-by-one inputs to the corresponding one-by-bit outputs of the first register, and by the second outputs to the corresponding one-bit inputs of the additional register of sheet maintenance, the frequency doubler is connected by the input To the sheet motion sensor, and the output to the clock input of the advance register, an additional sheet maintenance register is connected to the clock input to the sheet motion sensor, and the output is to the control input of the power supply unit of the electromagnets. Such a constructive embodiment of the device for automatic sheet sorting makes it possible to increase the reliability of forming a command to control electromagnets as a function of the speed of transporting the sheets through the unit. The drawing shows the block diagram of the device. The device contains a flaw detector 1, which monitors the presence of defects in the continuous strip 2, a strip motion sensor 3 and a strip tracking register 4, a first defect memory block 5, a driving mechanism sensor 6, a driving register 7 J and driving sensor 8 of the cut SHEET 9, the second block 10 of the memory of defects. Sheet presence sensor I1 and pulse shaper 12, frequency doubler 13 advance register 14, transfer unit 15, re, d / d: 1 -7 center 16 tracking and power supply unit 17 of electromagnets 18, position 19 for laying off non-conforming sheets for sorting cut with flying scissors 20 sheets for two grades; defective sheets sent to laying position 19 and conditional sheets sent to the flow of 21 sorts of metal. At the same time, the input of the pulse former 12 is connected to the output of the second block 10 of the memory of defects, the first output of the former 12 to the input of the first. , the register bit of 14 is ahead, and the high bit of register is 14 of advance, and the second output is at the information input, r-i.tjr rrv / T.r-rt / 1.1 and I am O Vf of the transfer unit 15. Transfer unit 15 is connected by the bit inputs to the corresponding bit outputs of the register 14, and the bit outputs to the corresponding bit inputs of the tracking register 16, the frequency doubler 16 is connected by the input to the sheet movement sensor 8, and the output to the clock input of the register 14 , the maintenance register 16 is connected to the clock input to the sheet motion sensor 8, and the last discharge output is connected to the control input of the power supply unit 17 of the electromagnets 18 position 19 of the substandard sheets. The device works as follows. The top level of the sheet stack in the pocket is automatically kept constant and the same for different sizes of sheets during the installation process. Therefore, the time required for a sheet to fall after disconnection of the illumination is constant and equal, where H is the height of the fall of the sheet (H const); g - acceleration of body strength. During the fall time tf, the leading edge of the sheet moves horizontally forward along the transport by an amount S. tn-V, whereY is the speed of transportation of sheets. Then, for proper installation, the disconnection of the electromagnets must be carried out proactively at the moment when the leading edge of the sheet is at a distance S to the front stop of the installation section. In the proposed device, the pulse shaper is assembled according to the scheme of the waiting one-shot and produces a pulse of a given duration tfl. The number of accompaniment and advance bits made according to the scheme of the shift registers and the transfer unit, taking into account the discreteness of the pulses of the sheet motion sensor, corresponds to the distance of the sheet sensor to the front (fixed) abutment of the stacking section. Each bit of the transfer unit represents the 2I circuit, the output of which is connected to the input of the corresponding bit of the maintenance register, one of the inputs is connected to the output of the corresponding bit of the advanced register, and the second inputs of the circuits of all bits are parallel and represent the information input of the transfer unit . When the front edge of the sheet to be laid in this section passes through the position of the sheet sensor, a pulse shaper is started, the output of which is a pulse with a duration tn. The leading edge of this pulse is recorded as "1 in the first bit of the register of the advance register, and with a frequency proportional to the double transport speed of the sheets 2X moves in this register from input to output. The falling edge of the pulse tn, which arrives at the information input of the transfer unit, is written "1 to one of the bits in the tracking register. The number of this bit corresponds to the number of the bit of the register of the advance, up to which during the time tn moved “1”, previously recorded in its first bit, by the leading edge of the pulse tn. As the pulses of the sheet motion sensor are received, the thus recorded "1" register with a frequency proportional to the speed of sheet transport moves in this register to the output, and, after the time T after starting the imager, it appears at the output of the tracking register, the result is a command to turn off the electromagnets. The path traversed by the sheet during T is equal to TV. The time T is the sum of the time tn, for which the information about the sheet in the advance register (and therefore, at the end of the interval tn and in the maintenance register) is twice as long as moving from the sheet sensor of the sheet itself, and the time T-tn, when the information about the sheet in the maintenance register moves synchronously with the movement of the sheet itself along the aggregate. By the time T, information from the tracking register will be ahead of the leading edge of the sheet itself by a distance equal to tn-V. Indeed, 2V4- (T-tn) -V TV- | -tnV, whence TV L-tf, V. Thus, the signal for laying the sheet in the device is emitted with a lead in time equal to in when the leading edge of the sheet is at a distance ttt-VOT of the fixed front stop of the laying section. The device works as follows. Information about the irregularity of the section of the strip 2 from the output of the flaw detector I is recorded in the first bit of the register 4 of the strip accompaniment, the number of working bits of which, taking into account the discreteness of the pulses of the motion sensor 3 of the strip, corresponds to the distance from the axis of the flaw detector to the axis of the volatile scissors 20 and synchronously with the movement of the defective section the strips along the aggregate move under the action of the pulses of the sensor 3 in the register 4 from the input to the output. At the moment when the defective strip section approaches the axis of the volatile scissors 20, information about it from the output of the register 4 is copied to the first defect memory block 5, where it is stored until the cut is completed and a signal is received from the cutting mechanism position sensor 6. From this point on, information about the sheet on which the substandard portion of the strip is located is recorded in the register 7 of the sheets. In addition, when each cut is made, the signal from the output of the sensor 6 with some delay in the first digit of the maintenance register 7 records information from the position of the trailing edge of the cut sheet. The number of bits of the register 7, taking into account the discreteness of the pulses of the sheet movement sensor 8, corresponds to the distance from the axis of the flying scissors 20 to the position of the sheet presence sensor 11. Information about the nonconformance of this sheet at the time of writing to the register

7 correlates with the location in this register 7 of the position of the trailing edge of the previous sheet and is written into the next bit occupied by this edge. Then, synchronously with moving around the aggregate of the trailing edge of the previous sheet, information about the conditionality of this sheet moves to the output of the register 7.

At the moment when the back edge of the previous sheet passes the position of the sensor 11, information about the nonconditioning of this sheet comes from the output of the register 7 to the recording input of the second defect memory unit 10, where it is stored until the position of the sensor 11 passes through the front edge of the non-standard sheet. At this moment, a signal from the sensor 11 interrogates the block 10, a signal from the output of which starts the pulse shaper 12 of a given duration t, equal to the time the sheet falls into the pouch pocket. The leading edge of the pulse of the driver 12 for the first register of the advance register 14 is recorded as "1", which, as it arrives at the frequency doubler 13, moves in register 14 from input to output. Thus, during the time interval tn in register 14, the double actual displacement of the nonconforming sheet, equal to 2V tn, is simulated.

The falling edge of the pulse former 12 supplied to the information input of the transfer unit 15 is recorded "1 in the register register 16, the number of which corresponds to the advance register number 14, to which

time tf, moved “1, previously recorded in its first discharge by the leading edge of the impulse generator 12. Further tracking of the non-conforming sheet in

The register 16 is executed as the sensor pulses arrive, 8 synchronously with the actual movement of the sheet through the unit, but with a lead time t, i.e. ahead of the distance S tn-V. The signal from the output of the last bit of the tracking register 16 is fed to the control input of the power supply unit 17, the electromagnets 18 of the laying position 19 at a time when the leading edge of the non-conforming sheet has not reached the stationary front stop of the non-standard laying section and is at the distance S tM-VoT last one.

Suitable sheets are directed to the flow of 21 graded metal. Sheets are laid in the section of the high-grade metal also with automatic control of the moment.

switching off the electromagnets of the respective sections as a function of the sheet transport speed according to a scheme similar to that described for each section of its sensors, pulse formers, forward and tracking registers, electromagnet transport and power units and common for all sections of the sheet motion sensor and frequency doubler.

The feasibility of the proposed device lies in

enhancing the reliability of its operation and facilitating maintenance by eliminating the constant monitoring and adjustment of parameters of signal sources during operation.

Claims (1)

DEVICE FOR AUTOMATIC DISASSEMBLY OF SHEETS containing a flaw detector electrically connected between themselves, first and second defect memory blocks, motion sensors and strip and sheet tracking registers, a position sensor for the cutting mechanism, a sheet presence sensor and an electromagnet power supply unit, characterized in that, for the purpose of improving reliability by improving the accuracy of sheet sorting and eliminating constant monitoring and fine tuning of signal sources, it is equipped with a pulse shaper, an information transfer unit a register of information advancing, a frequency doubler and an additional register of tracking sheets, while the pulse shaper is connected by its input to the output of the second memory block of defects, the first output to the input of the first bit of the advance register, and the second output to the information input of the transfer unit, transfer unit connected by bit inputs to the corresponding bit outputs of the advance register, and bit-outputs - to the corresponding bit inputs of the additional register of escort foxes Comrade, the frequency doubler is connected by the input to the sheet movement sensor, and by the output to the clock input of the lead register, the additional sheet tracking register is connected by the clock input to the sheet movement sensor, and by the output to the control input of the electromagnet power supply.