SU821084A1 - Sheet rejecting system - Google Patents

Description

one

The invention relates to the automation of rolling production and can be used on cross-cutting machines for a thick strip equipped with a non-standard spreading machine.

A system for sorting sheets on cross-cutting strips is known, comprising quality sensors, conveyor motion sensors, tracking registers connected to quality sensors and with motion sensors of conveyor 1.

However, this system allows sorting only thin sheets (0.4–2 mm) according to several quality classes and is unsuitable for sorting thick sheets (2–16 mm) / where the technology provides for a special program of measuring the size of sheets with a set of lengths from 2.5 mO 12 m with their subsequent transportation on an electromagnetic roller table and a layout into two sections of sheet-laying machines of conditional metal and one section of a sheet-laying machine without condition.

The closest technical solution is a sheet rejection system for cross-cutting machines for a thick strip containing an electromagnetic roller table, control units

electromagnetic roller, non-standard sheet-laying machine, measure control unit. cuts, position sensors of the sheets, a trimmer, a clock generator, a synchronization unit,

electrically connected to the position sensors of the sheets, with a clock pulse generator and a trimmer shaper, a trimming command generation unit electrically connected to an electromagnetic roll table control unit, a unit

management of information write-off, electrically connected to the synchronization unit. This system provides for rejection of sheets according to the deviation of length and surface defect and their resistance to non-standard sheet-laying machine 2.

The disadvantage of this system is the low quality of work, since all defective sheets are accompanied by one channel and then stacked in one common package on a non-standard sheet stacker.

Thus, a large amount of suitable metal of various lengths goes together with a cut into an off-spec package. The aim of the invention is to increase the quality of the system by creating an independent system allowing sections of the strip where the defect is predetermined (for example, at the beginning and end of the roll) to be cut into different empty sheets using a different program, while the measuring sheets are accompanied and stacked , and the residual trim, obtained by trimming the edges, is placed in another package. The goal is achieved by the fact that the sheet rejection system is provided with a key for recording information about measuring sheets, a control unit electrically connected to a control unit for measuring cutting and a key for recording information about measuring sheets, a three-channel push pull shift register electrically connected with a key for recording information about measuring sheets , with a synchronization unit, with a clock pulse generator, with a control unit for writing off information and with a unit for generating commands for resetting the trimming, with a unit for generating commands for throwing a measuring sheet electrically connected to a three-channel push-pull shift register and one of the position sensors of the sheets, an automatic stacking unit for measuring sheets electrically connected to the specified sheet sensor, with a command generation unit for resetting the measuring sheet and an electromagnetic roller control unit, as well as an additional sheet position sensor electrically connected to the trimming command generation unit, a synchronization unit and a delay unit electrically connected to the decree nnym sheets position sensor and the synchronization unit. The drawing shows a block diagram of the system of rejection of sheets. The sheet rejection system is included in the cross-cutting unit of a thick strip consisting of flying shears 1, a belt conveyor 2 and a sheet-correcting mask 3, and contains an electromagnetic roller table 4, blocks 5 and 6 for controlling the electromagnetic roller table, or if the stacker 7 is non-standard, block 8 controls the dimensional cut flying scissors, three sensors 9, 10 and 11 of the position of the sheets, the trimmer 12 of the trimming signal, a generator of 13 clock pulses, a synchronization unit 14 connected to the sensors of the position of the sheets, with a generator of 13 clock pulses and the driver of 12 the trimming signal, a trimming reset command unit 15 connected to an electromagnetic roller table control unit 5, an information write-off control unit 16 connected to a synchronization unit 14, a measuring sheet information key 17, a control unit 18 connected to a dimensional cutter 8 and with the key of the information about the measuring sheets 17, a three-channel push-pull shift register 19 with channels 20, 21 and 22, connected to the key 17 of the recording of the information about the measuring sheets, with the synchronization unit 14, with the generator 13 clocks, with the information management block 16 and with the reset command generation unit 15 for resetting the reset command unit 23 for resetting the measuring sheet connected to the three-channel push-pull shift register 19, with the sheet position sensor, block 24 for automatically laying the measuring sheets connected to the sheet sensor 11 , with a unit for forming commands to reset the measuring sheet and with a unit 6 for controlling an electromagnetic roller, an additional sensor 25 for positioning the sheets connected to the unit 15 for generating a command for resetting the cut and with unit 14 si synchronization, a delay unit 26 connected to the sheet position sensor 11 and a synchronization unit 14. With reference to the cross-cutting unit, the rejection system works as follows. Before the strip cut is started, the basic and additional programs for the length of the sheet are set in the measuring unit 8 for controlling the shearing of the flying shears. Before the start of the unit, the operator issues the command "Enable rejection of the strip by issuing it to the input of the control unit 18. After scissors cutting the front edge of the strip from the information output of the control unit of the measuring cuts, the cutting impulse turns on the control unit 18, which gives a signal to open the key 17 and simultaneously the program input of the block 8 prohibits the main program and allows additional work. The sensor of the 9 sheets (along the front edge of the sheet) through the synchronization block 14 and the public key 17 will record the future sheet in channel 20 of the three-channel push-pull register 19. This information will be shifted by pulses of the clock generator 13 to the end of the first part of it p will be stored there signal on his second recording entry from the sensor 10 sheets. Similarly, information about this sheet will be zapischet on the first entrance to the channel 22 from the sensor 9 sheets, but the key is the record key 17. After the next cut, if the command "Disable rejection, was sent by this time, the cut signal from the output of block 8 was sent through the control block 18, the recording key 17 is closed, the additional program is disabled and the main program is enabled. Now the second sheet will be cut off according to the main program, and information about it will be recorded only in channel 22 of the three-channel register. The first cut sheet, moving along the aggregate line, crosses the second 10-sheet sensor, with a signal (along the rear edge of the sheet) through the synchronization unit 14 on the second input of the channel 20 recording, the information is overwritten from its first part to the second and shifted to its last bit. The same thing will happen in channel 22, since they have common inputs. If, prior to the arrival of the signal from the 10-sheet sensor, the cut signal from the former 12 was recorded at the first recording input of the channel 21, then its operation will be similar when the signal is received from the 10-sheet sensor. After the information about the sheet was shifted to the end of the register (even before it came to the non-standard sheet stacker 7), the write-off control unit 16 chose depending on the state of the last bit of the channel, 21 write-off signal: or from the sheet sensor, if there is information about trimming, or from the sensor 11 sheets, if it is not. If the clip information was recorded earlier in channel 21 of the three-channel register, the signal from the direct output of the last bit of channel 21 writes off the circuit information - sheet sensor, synchronization unit 14, input of the write-off control unit 16 Simultaneously signal from ::: 21 enters block 15 and when a signal appears at its second input from the 25-sheet sensor (along the front edge of the sheet), it issues a command to control block 5 to turn off the electromagnet of the roller table 4 in

 parts A of the spreading sheet 7. The cut is stacked in a packet, and a signal (along the rear edge of the cut) from a 25-sheet sensor, information on the laid sheet is copied from a three-channel register.

If the cropping information was missing in channel 21, then the signal from the inverse output of its last bit is copied off from an 11-sheet sensor. If there is information about the measuring sheet in the channel. 20 a signal from its output (in the absence of a signal about the presence of a sheet under the sensor I1 sheets) permits the operation of block 24 in the automatic stacking mode.

The signal about the passage of the front edge of the sheet under the sensor 11 enters the automatic stacking unit 24 to select the point of its reset.

At the same time, this signal, through the block 26 of the delay and the block 14 of the synchronization, enters the block 16 of the control of writing off information. The delay is necessary in order to prevent false triggering of the block 15 when the trailing edge of the sheet, addressed to the second part B of the sheet-laying machine 7 under the sensor 25, passes, if the next sheet is a cut that needs to be reset earlier than the previous sheet.

The proposed rejection system has a high quality of work.

Claims (2)

1. Metallurgical equipment. Systems of automatic sorting of sheets on the cross-cutting unit. Survey Research Institute Inform Tyazhmash, № 1-78-34. 2. System of automatic tracking and rejection of sheets. Project. LE09. 15.01. Len.PEO, VNIIPEM, L., 1976. Yu Su Q Ltd