CN111421179A - Rod cold shearing fixed-length shearing control system - Google Patents

Rod cold shearing fixed-length shearing control system Download PDF

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Publication number
CN111421179A
CN111421179A CN202010241278.3A CN202010241278A CN111421179A CN 111421179 A CN111421179 A CN 111421179A CN 202010241278 A CN202010241278 A CN 202010241278A CN 111421179 A CN111421179 A CN 111421179A
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cold
shearing
length
output end
state
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CN111421179B (en
Inventor
叶光平
钱海帆
王光亚
吴坚
钱晓斌
王金来
刘朝彤
陈飞
李冬清
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Maanshan Iron and Steel Co Ltd
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Maanshan Iron and Steel Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B23D33/006—Accessories for shearing machines or shearing devices for obtaining pieces of a predetermined length, e.g. control arrangements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration

Abstract

The invention discloses a bar cold shearing fixed-length shearing control system, wherein the deviation between the linear speed reference value of a magnetic chain plate and the actual moving speed of a bar is generally gradually reduced or disappeared along with the gradual shortening of a whole bar after shearing, some fixed-length shearing control cold checks are arranged as much as possible after the cold shearing, the improvement of the fixed-length shearing precision is facilitated, meanwhile, a length deviation correction means is provided for each fixed-length shearing of the whole bar, and the fixed-length shearing precision can be further improved.

Description

Rod cold shearing fixed-length shearing control system
Technical Field
The invention belongs to the technical field of electric transmission control, and particularly relates to a bar cold shearing fixed-length shearing control system.
Background
For a south-region bar production line of the division of long bars of horse steel, cold shearing for completing bar sizing shearing and front and rear equipment of the cold shearing are mainly composed of a bar cold bed output roller way, a bar conveying magnetic chain plate before the cold shearing, a cold metal detector (cold detection for short) before and after the cold shearing, a cold shearing body, a first group (1 # for short) of nonmagnetic roller ways after the cold shearing, a second group (2 # for short) of magnetic roller ways after the cold shearing and a third group (3 # for short) of nonmagnetic roller ways after the cold shearing. The cold check profile of the on-line cold shear sizing shear control scheme is shown in figure 1 below. As can be seen from fig. 1 below, the on-line cold shearing fixed-length shearing control scheme only uses two cold checks arranged at positions 5.5 meters and 8 meters behind the cold shearing to respectively complete the shearing control of the fixed length of less than 8 meters and the fixed length of more than 8 meters, and based on the control scheme, for the shearing of different fixed lengths, the fixed-length shearing control system takes the linear speed reference value of the magnetic chain plate before the cold shearing as the actual moving speed of the bar and obtains the fixed-length shearing length of the bar through proper time delay from the detection moment of the head of the bar of the corresponding fixed-length shearing control cold check. From the actual sizing and shearing precision, the on-line sizing and shearing precision is mainly influenced by the speed deviation between the reference value of the linear speed of the magnetic chain plate before cold shearing and the actual moving speed of the bars, whether a group of bars can keep synchronous with the moving speed of the magnetic chain plate in the moving process of the magnetic chain plate or not mainly depends on the magnetic force of the magnetic chain plate and the tension state between the bars on the magnetic chain plate and the bars on the front and rear conveying roller ways; in addition, the magnetic force of the magnetic chain plate can be gradually reduced along with the use time and the abrasion of the magnetic chain plate, the tension between the bar on the magnetic chain plate and the bar on the front conveying roller way and the rear conveying roller way of the magnetic chain plate can be gradually increased along with the aggravation of the abrasion of the roller way surface, and on the basis, the deviation between the reference value of the linear speed of the magnetic chain plate and the actual moving speed of the bar is easy to occur, so that the shearing precision of the fixed-length shearing is.
Disclosure of Invention
The invention provides a bar cold shearing fixed-length shearing control system, which is additionally provided with a fixed-length shearing control cold detector after cold shearing to improve the fixed-length shearing precision.
In order to achieve the aim, the technical scheme adopted by the invention is that the bar cold shearing fixed-length shearing control system is provided with n (n >3) fixed-length shearing control cold checks behind a cold shear, the distance between the first fixed-length shearing control cold check and the cold shear is L m (based on the shortest set bar fixed-length), the distance between the rest fixed-length shearing control cold checks is L n (based on shearing precision, the higher the shearing precision, the smaller the value of L n, the general value is 1m), and the bar cold shearing fixed-length shearing control program comprises a fixed-length shearing control cold check selection unit, a fixed-length shearing control cold check and cold shear interval setting unit, a cold shear bar head shearing control unit and a cold shear bar fixed-length shearing control unit;
the fixed-length shearing control cold detection selection unit automatically selects the corresponding fixed-length shearing control cold detection CMDn based on the set fixed-length shearing length;
the fixed-length shearing control cold detection and cold shear interval setting unit outputs the selected fixed-length shearing control cold detection CMDn and cold shear interval;
under the condition that the difference between the actual speed of the magnetic chain plate transmission motor and the reference speed before cold shearing is within +/-5% of the rated speed of the motor, and the 'cold shearing fixed length shearing permission signal' and the 'cold shearing head selection' are both in a '1' state, the cold shearing bar head shearing control unit obtains the time delay of bar head shearing starting, and sends a bar head shearing starting instruction to the cold shearing body control system after the time delay, and the cold shearing finishes the shearing of the bar head;
under the condition that "cold shear scale shear allowance signal" and "cold shear head select" all are in '1' attitude, cold shear bar scale shear the delay time that the control unit obtained the bar scale shear start, and after the delay time to cold shear body control system send bar scale shear start instruction, a bar scale shear is accomplished to the cold shear, whole bar scale shear number that sets for has not reached, and after the cold shear scale shear control cold check CMDn detect the bar head when, cold shear bar scale shear the control unit and carry out the next bar of bar and cutCutting to length until the actual length-fixed cutting number of the cold shears is equal to the set length-fixed cutting number Ncut.dWhen the cutting is finished, a whole bar fixed-length cutting finishing signal is sent to a control system of the cold shear body;
the delay time of the cutting start of the head of the bar is the sum of two parts, the first part is the sum of the distance between the fixed-length cutting control cold inspection CMD0 and the cold shears before the cold shears and the set cutting length of the head of the bar, the sum is divided by the reference speed of the magnetic chain plate before the cold shears, then the cold shears start time is subtracted, and the second part is the set correction time △ t0The delay time of the fixed-length shearing start of the bar is the sum of two parts, the first part is the difference between the set fixed-length shearing length of the bar and the distance between the fixed-length shearing control cold inspection CMDn and the cold shear, the difference is divided by the reference speed of the magnetic chain plate before the cold shear, then the cold shear start time is subtracted, and the second part is the set correction time △ t.
Furthermore, the control unit for rapidly separating the fixed-length head and the tail of the cold-sheared bar immediately accelerates the 1# to 3# roller ways after cold shearing after the fixed-length shearing, so that the tail of the fixed-length bar just sheared is separated from the head of the fixed-length bar to be sheared.
Furthermore, the sizing shearing control cold detection selection unit is composed of functional blocks BDJC 01-BDJC 04, BDJC 06-BDJC 09, BDJC 011-BDJC 014, BDJC 016-BDJC 019, BDJC 021-BDJC 024, BDJC 026-BDJC 029, BDJC 031-BDJC 034, BDJC 036-BDJC 039, BDJC041, BDJC042, BDJC044 and BDJC 045;
when 6m is less than or equal to LdWhen the number is less than 7m, the output end Q of the function block BDJC04 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC06 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD1, and when the number is less than or equal to 7m and less than or equal to LdWhen the number is less than 8m, the output end Q of the function block BDJC09 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC11 and the output end Q of the BDJC45 are equal to the state of the cold test CMD2 of the shear control with fixed length, and when the number is less than or equal to L and 8mdWhen the number is less than 9m, the output end Q of the function block BDJC14 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC16 and the output end Q of the BDJC45 are equal to the state of the cold testing CMD3 of the shear control with fixed length, and when the number is less than or equal to 9m and less than or equal to LdWork at less than 10mThe output end Q of the energy block BDJC19 is changed from '0' state to '1' state, the states of the output end Q of the functional block BDJC21 and the output end Q of the BDJC45 are equal to the state of the cold-detection CMD4 of the shear control with the fixed length, and when the length of 10m is less than or equal to LdWhen the number is less than 11m, the output end Q of the function block BDJC24 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC26 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD5, and when the number is less than or equal to 11m and less than or equal to LdWhen the number is less than 12m, the output end Q of the function block BDJC29 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC31 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD6, and when the number is less than or equal to 12m and less than or equal to LdWhen the number is less than 13m, the output end Q of the function block BDJC34 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC36 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD7, and when the number is less than or equal to 13m and less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC39 is less than 14m, the state of the output end Q of the functional block BDJC41 and the state of the output end Q of the BDJC45 are equal to the state of the cold test CMD8 controlled by shear control at the fixed length, and if the number of the output ends Q of the functional blocks BDJC41 and the output ends Q of the BDJC45 is less than or equal to L, the output end QdWhen the output terminal Q of the functional block BDJC42 will change from '0' state to '1' state, the state of the output terminal Q of the functional block BDJC44 and the output terminal Q of the BDJC45 will equal the state of the cut-to-length control cold check CMD 9.
Furthermore, the unit for setting the distance between the cold inspection and the cold shear under the control of the fixed-length shear is composed of functional blocks BDJC 01-BDJC 05, BDJC 07-BDJC 10, BDJC 012-BDJC 015, BDJC 017-BDJC 020, BDJC 022-BDJC 025, BDJC 027-BDJC 030, BDJC 032-BDJC 035, BDJC 037-BDJC 040, BDJC042, BDJC043 and BDJC 046;
when 6m is less than or equal to LdWhen the number is less than 7m, the output end Q of the function block BDJC04 is changed from '0' state to '1' state, the output end Y of the function block BDJC05 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD1 and the cold shears, and when the number is less than or equal to 7m and less than or equal to LdWhen the length is less than 8m, the output end Q of the function block BDJC09 is changed from '0' state to '1' state, the output end Y of the function block BDJC10 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD2 and the cold shears, and when the length is less than or equal to L m, the distance is less than or equal to 8md< 9m, the output Q of the functional block BDJC14 will change from '0' state to '1' state, the output Y of the functional block BDJC15 andthe output end Y of the BDJC46 is equal to the distance between the fixed-length shearing control cold-detection CMD3 and the cold shears, and when the distance is less than or equal to 9m and less than or equal to LdWhen the length is less than 10m, the output end Q of the function block BDJC19 is changed from '0' state to '1' state, the output end Y of the function block BDJC20 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD4 and the cold shears, and when the length is less than or equal to L m, the distance is less than or equal to 10mdWhen the distance is less than 11m, the output end Q of the function block BDJC24 is changed from '0' state to '1' state, the output end Y of the function block BDJC25 and the output end Y of the BDJC46 are equal to the distance between the cold-shearing control CMD5 and the cold shears, and when the distance is less than or equal to 11m and less than or equal to LdWhen the distance is less than 12m, the output end Q of the function block BDJC29 is changed from '0' state to '1' state, the output end Y of the function block BDJC30 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD6 and the cold shears, and when the distance is less than or equal to 12m and less than or equal to LdWhen the distance is less than 13m, the output end Q of the function block BDJC34 is changed from '0' state to '1' state, the output end Y of the function block BDJC35 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD7 and the cold shears, and when the distance is less than or equal to 13m and less than or equal to LdWhen the number is less than 14m, the output end Q of the function block BDJC39 is changed from '0' state to '1' state, the output end Y of the function block BDJC40 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD8 and the cold shears, and when the number is less than or equal to 14m and less than or equal to LdIn the meantime, the output end Q of the functional block BDJC42 will change from '0' state to '1' state, and the output end Y of the functional block BDJC43 and the output end Y of the functional block BDJC46 will be equal to the distance between the cut-to-length shear control cold detection CMD9 and the cold shear, which is 11.5 meters.
Further, the head shearing control unit of the cold shearing bar material consists of functional blocks BDJC 50-BDJC 68 and BDJC 193-BDJC 197;
under the condition that the difference between the actual speed of the magnetic chain plate transmission motor before cold shearing and the reference speed is within +/-5 percent of the rated speed of the motor and the 'cold shearing fixed-length shearing allowing signal' and 'cold shearing head selection' are both in a '1' state, when the cold detection CMD0 before cold shearing detects the head of a bar, namely the CMD0 state is changed from loss detection to detection time, the output end Q of the function block BDJC66 generates a t0A 1' pulse of duration, t0The device consists of two parts: part of the magnetic chain plate is divided by the sum of the distance between the cold-detection CMD0 and the cold shears and the set shearing length of the head of the bar material by the reference speed of the magnetic chain plate before the cold shearsThe ideal delay time of the cold shearing bar head shearing start obtained by subtracting the cold shearing start time, and the settable correction time △ t as the other part0At t0When the output end Q of the back functional block BDJC66 is changed from a '1' state to a '0' state, the output ends Q of the functional blocks BDJC68, BDJC193 and BDJC195 generate a '1' pulse of a program cycle period, and the output end Q of the functional block BDJC197 outputs a cold shear bar head shearing starting command with the duration of 100ms, so that the cold shear is started to complete the bar head shearing; when the output end Q of the function block BDJC66 has '1' pulse required by the shearing of the head of the bar, the output ends Q of the function blocks BDJC55 and BDJC56 change from '1' state to '0' state until the cold shearing 'fixed-length shearing permission signal' is blocked after the whole bar is subjected to fixed-length shearing.
Further, the cold shearing bar material fixed length shearing control unit is composed of functional blocks BDJC 69-BDJC 178 and BDJC 193-BDJC 197;
under the condition that the 'cold shear cut length shear allowance signal' and the 'cold shear head selection' are both in a '1' state, when the cold shear head of the cold shear bar is started, the output ends Q of the function blocks BDJC70 and BDJC71 are changed from '0' to '1' state, and when the cold-detection CMDn for the set cut length control after cold shearing detects the head moment of the bar, the output end Q of the function block BDJC77 generates a t11' pulse of duration, t1The method comprises the following steps that one part is the ideal delay time of the fixed-length shearing start of the cold-shearing bar material obtained by dividing the difference between the set fixed-length shearing length of the bar material and the distance between the cold-detected CMDn and the cold shears by the reference speed of a magnetic chain plate before the cold shears and then subtracting the cold shear start time, and the other part is the set correction time △ t1 at t1When the output end Q of the back function block BDJC77 is changed from '1' state to '0' state, the output ends Q of the function blocks BDJC79, BDJC193 and BDJC195 generate '1' pulses of a program cycle period, and the output end Q of the function block BDJC197 outputs a cold shear bar fixed-length shear starting command with the duration of 100ms, so that the cold shear start can complete the 1 st fixed-length shear of the whole bar, and under the condition that the 'cold shear fixed-length shear allowing signal' and the 'cold shear head selection' are both in the '1' state,when the cold shear starts to cut the whole bar at the first fixed length, the output Q of the function block BDJC81 in the unit changes from '0' to '1', and when the set fixed length cutting number of the whole bar does not reach and the cold test CMDn for the set fixed length cutting control detects the head moment of the bar after the cold shear, the output Q of the function block BDJC84 in the unit generates a t21' pulse of duration, t2The method comprises two parts, wherein one part is an ideal delay time for starting the fixed-length shearing of the cold-shearing bar, the other part is a set correction time △ t2, when the output end Q of the functional block BDJC84 is changed from a '1' state to a '0' state after t2, the output ends Q of the functional blocks BDJC86, BDJC193 and BDJC195 generate '1' pulses of a program cycle period, and the output end Q of the functional block BDJC197 outputs a cold-shearing bar fixed-length shearing starting command with the duration of 100ms, so that the cold shearing can be started to complete the 2 nd fixed-length shearing of the whole bar, and when the cold actual fixed-length shearing number is equal to the set fixed-length shearing number Ncut.dMeanwhile, the output end QU of the functional block BDJC177 is changed from '0' to '1' state, so that the output end Q of the functional block BDJC178 is changed from '1' to '0' state, and a signal that the whole bar is cut to length is sent to a cold shear body control system.
Furthermore, the cold-shearing rod fixed-length head-tail rapid separation control unit consists of functional blocks BDJC198 to BDJC 203;
when a cold shearing bar material sizing shearing control unit sends a cold shearing starting signal, the output end Q of a function block BDJC198 generates a 1 ' pulse with the duration of 2.3s, the output end Q of a function block BDJC199 generates a 1 ' pulse with the duration of 1s, during the 1 ' pulse of 1s, the output end Y of a function block BDJC200 outputs a 2V roller way reference speed additional value, and the roller way reference speed additional value is accumulated with the original reference speed of a 1# to 3# roller way after cold shearing through function blocks BDJC201 to BDJC203 and then is respectively used as the reference speed of the 1# to 3# roller way; therefore, after the cold shearing, the 1# to 3# roller ways can accelerate for a short time of 1 second after the cold shearing of the bar, and the tail part of the cut length just sheared can be effectively separated from the head part of the cut length to be sheared.
The deviation between the reference value of the linear velocity of the magnetic chain plate and the actual moving speed of the bar can be gradually reduced or disappeared along with the gradual shortening of the cut-to-length bar, certain cut-to-length cutting control cold detection is arranged as much as possible after the cold shearing, the change of the cut-to-length cutting precision is facilitated, meanwhile, a length deviation correction means is provided for each cut-to-length cutting of the bar, and the cut-to-length cutting precision can be further improved.
Drawings
FIG. 1 is a cold check distribution diagram of a prior art on-line cold shear sizing shear control scheme;
FIG. 2 is a cold shear distribution diagram of an on-line cold shear sizing shear control scheme provided by an embodiment of the present invention;
fig. 3 is a structural diagram of a bar sizing accuracy control program according to an embodiment of the present invention, where 3(a) is a structural diagram of a bar sizing accuracy control program, 3(b) is a structural diagram of a bar sizing accuracy control program, 3(c) is a structural diagram of a bar sizing accuracy control program, and 3(d) is a structural diagram of a bar sizing accuracy control program.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
The deviation between the reference value of the linear velocity of the magnetic chain plate and the actual moving speed of the bar can be gradually reduced or disappeared along with the gradual shortening of the cut-to-length bar, certain cut-to-length cutting control cold detection is arranged as much as possible after the cold shearing, the change of the cut-to-length cutting precision is facilitated, meanwhile, a length deviation correction means is provided for each cut-to-length cutting of the bar, and the cut-to-length cutting precision can be further improved. The scale cutting control cold inspection required by the bar cold cutting scale cutting control system is shown in the following figure 2;
FIG. 3 shows a cold shear sizing control program for bars, where FIG. 3 is composed of FIGS. 3(a), 3(b), 3(c) and FIG. 3(d), FIG. 3 shows L VM as a "bidirectional value out-of-tolerance detection" function block, in the case of HY 0, QU is '1' when X is equal to or greater than M + L, QM is '1' when M-L < X < M + L, and Q L is '1' when X is equal to or less than M-LThe method comprises the steps of a function block of ' numerical comparison ' CM, a function block of ' Q ' 1 ' when X1 > X2, Q ' 1 ' when X1 > X2, Q L ' 1 ' when X1 < X2, a function block of ' reset R-preferred RS flip-flop ' RSR, a function block of ' 1 ' when S ' 1 ' AND R ' 0 ', Q ' 1 ', QN ' 0 ', R ' 1 ' when S ' 1 ' AND R ' 0 ', Q ' 0 ' AND QN ' 1 ' when S ' 0 ' AND R ' 0 ', Q ' 0 ' AND QN ' 1 ', a function block of ' bidirectional counter ' CTR, IU AND ID respectively as forward AND backward leading edge pulse input ends, R AND S58as reset AND set ends of a counter, SV as a set value of the counter, L AND U36, a counter, a function block of ' bidirectional counter ' function block of ' QP ', Q ' AND D as a function block of ' AND D ', a function block of ' forward AND Q ' as a function block of ' 8 ', a function block of ' AND Q ' 0 ', a function block of ' 12 ' Q ' AND Q ' 0 ', a function block of ' Q ' AND Q ' 0 ', a function block of ' 1 ' AND Q ' 0 ', a function block of ' forward AND a function block of ' Q ' Q ' forward AND a function block of ' Q ' forward AND a function block of ' Q ' 1 ' AND a function block of ' Q ' AND a function block of ' forward AND a function block of ' Q ' AND a function block of ' Q ' AND a function block of ' forward AND a function block of ' Q ' 0 ' a function block of ' Q ' a function block of ' AND a function block of ' Q ' AND a function of ' a function block of ' a function of ' Q ' a function of ' AND a function block of ' Q ' AND a function block of ' forward AND a function block of ' a function block of ' AND a function block of ' Q ' when the same function block of ' AND a function block of ' Q ' 0 ' QHEAD(HMI) crop length set for HMI screen LdThe (HMI) is the fixed length set by the HMI operation picture, CMDn is the nth cold inspection after cold shearing, L CMDn is the distance between the nth cold inspection and the cold shearing after the cold shearing, NMSTR.D.refMagnetic before cold shearingThe chain plate drives the motor reference speed; n is a radical ofMSTR.D.act is the actual speed of the magnetic chain plate driving motor before cold shearing; n is a radical ofMSTR.NRated speed of a magnetic chain plate driving motor before cold shearing; i.e. igearThe magnetic chain plate drives the reduction ratio of a motor reducer before cold shearing; phi is aMSTRThe roll diameter of the magnetic chain plate driving roll before cold shearing; vZThe actual linear speed of the magnetic chain plate body before cold shearing; CTR is a signal that the fixed length cutting number set by cold cutting is not finished; n is a radical ofcut.d(HMI) the number of cold shears to length set for HMI operation screen; n is a reasonable signal for setting the cold shearing fixed length shearing number; n is a radical of1#GY.ref.The original reference speed of the 1# roller way after cold shearing; n is a radical of2#GY.ref.The original reference speed of the 2# roller way after cold shearing; n is a radical of3#GY.ref.The original reference speed of the 3# roller way after cold shearing is △ NGSFThe added value of the reference speed of the 1# to 3# roller way after cold shearing; n is a radical of1#GF.ref.The final reference speed of the 1# roller way after cold shearing; n is a radical of2#GF.ref.The final reference speed of the roller table is 2 after cold shearing; n is a radical of3#GF.ref.The final reference speed of the 3# roller way after cold shearing. In view of the fact that the cold shearing is to finish the fixed-length shearing in the process of rapidly moving the bar, the cycle time of the bar cold shearing fixed-length shearing control program needs to be controlled within 2ms in order to obtain the fixed-length shearing precision required by the process.
The bar cold shearing fixed length shearing control program mainly comprises five control units, and specifically comprises:
namely functional blocks BDJC 01-BDJC 04, BDJC 06-BDJC 09, BDJC 011-BDJC 014, BDJC 016-BDJC 019, BDJC 021-BDJC 024, BDJC 026-BDJC 029, BDJC 031-BDJC 034, BDJC 036-BDJC 039, BDJC041, BDJC042, BDJC044 and BDJC045 form a fixed-length shearing control cold detection selection unit;
functional blocks BDJC 01-BDJC 05, BDJC 07-BDJC 10, BDJC 012-BDJC 015, BDJC 017-BDJC 020, BDJC 022-BDJC 025, BDJC 027-BDJC 030, BDJC 032-BDJC 035, BDJC 037-BDJC 040, BDJC042, BDJC043 and BDJC046 form a fixed-length shearing control cold inspection and cold shearing interval setting unit;
the functional blocks BDJC 50-BDJC 68 and BDJC 193-BDJC 197 form a head shearing control unit of the cold shearing bar;
the functional blocks BDJC 69-BDJC 178 and BDJC 193-BDJC 197 form a cold shearing bar material fixed length shearing control unit;
the functional blocks BDJC 198-BDJC 203 form a fixed-length head-tail quick separation control unit of the cold shearing bar.
For various reasons, the theoretical calculation speed of the bar moving always deviates from the actual speed, so that for the method for obtaining the cold shearing fixed length shearing length by the fixed length shearing control system based on the fixed length shearing control cold check, the theoretical calculation speed of the bar moving and the corresponding delay time, the longer the delay time used is, the larger the error of the fixed length shearing length is, therefore, in order to reduce the delay time used for calculating the fixed length shearing length and improve the fixed length shearing precision, the cold shearing fixed length shearing control method is provided with a group (nine in total) of fixed length shearing control cold checks (as shown in figure 2) after the cold shearing, which are respectively used for the shearing control of different fixed lengths, and in view of the fact that the maximum moving speed of the bar on a conveying roller table after the cold shearing can reach 1.7m/s and the time from the cold shearing start to a shearing point is about 1.25s, the fixed length of the bar set by 6 meters and above (called L for short) is realizedd) After cold shearing, the first fixed-length shearing control cold inspection (namely CMD1) is arranged at the position 3.5m away from the cold shearing, the other eight fixed-length shearing control cold inspections (namely CMD 2-CMD 9) are respectively arranged at the distance of 1 meter, and the CMD 1-CMD 9 are respectively used for 6m to Ld＜7m、7m≤Ld＜8m、8m≤Ld＜9m、9m≤Ld＜10m、10m≤Ld＜11m、11m≤Ld＜12m、12m≤Ld＜13m、13m≤Ld< 14m and 14m ≦ LdBased on the fixed-length cutting control, the cold-cutting fixed-length cutting control system automatically selects the corresponding fixed-length cutting control cold inspection according to the fixed-length cutting length set by the HMI operation picture aiming at different fixed-length cutting control, therefore, a fixed-length cutting control cold inspection selection unit is arranged in the cold-cutting fixed-length cutting control program, and the control program of the fixed-length cutting control cold inspection selection unit can know that when the fixed-length cutting control is less than or equal to 6m, the fixed-length cutting control is not more than LdIf < 7m, the output Q of the functional block BDJC04 in the cell will change from '0' state to '1' state, the output Q of the functional block BDJC06 in the cell and the output Q of the BDJC45 in the cell (i.e. the programMiddle CMDn) state will be equal to that of the cut-to-length shear control CMD1, likewise, when 7m is less than or equal to LdWhen the number is less than 8m, the output end Q of the function block BDJC09 in the unit is changed from a '0' state to a '1' state, the state of the output end Q of the function block BDJC11 and the output end Q of the BDJC45 in the unit (namely CMDn in the program) is equal to the state of the cut-to-length control cold check CMD2, and when the number is less than or equal to 8m and less than or equal to LdWhen the number of the output ends Q of the function blocks BDJC14 in the unit is less than 9m, the state of the output ends Q of the function blocks BDJC16 and BDJC45 in the unit (namely CMDn in the program) is equal to the state of the constant-length shearing control cold test CMD3, when the number of the output ends Q of the function blocks BDJC19 in the unit is less than L d and less than 10m, the state of the output ends Q of the function blocks BDJC21 and BDJC45 in the unit (namely CMDn in the program) is equal to the state of the constant-length shearing control cold test CMD4, when the number of the output ends Q of the function blocks BDJC14 in the unit is less than 10m and less than L m, the state of the output ends Q of the function blocks BDJC14 in thedWhen the number is less than 11m, the output end Q of the function block BDJC24 in the unit is changed from a '0' state to a '1' state, the state of the output end Q of the function block BDJC26 and the output end Q of the BDJC45 in the unit (namely the CMDn in the program) is equal to the state of the cut-to-length control cold check CMD5, and when the number is less than or equal to 11m and less than or equal to LdWhen the number is less than 12m, the output end Q of the function block BDJC29 in the unit is changed from a '0' state to a '1' state, the state of the output end Q of the function block BDJC31 and the output end Q of the BDJC45 in the unit (namely the CMDn in the program) is equal to the state of the cut-to-length control cold check CMD6, and when the number is less than or equal to 12m and less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC34 in the unit is less than 13m, the state of the output end Q of the functional block BDJC36 and the state of the output end Q of the BDJC45 (namely the CMDn in the program) in the unit are equal to the state of the cut-to-length control cold test CMD7, and if the number of the output ends Q of the functional block BDJC36 and the output end Q of the BDJC45 is less than or equal to L m, the state isdIf the number of the output ends Q of the functional blocks BDJC39 in the unit is less than 14m, the state of the output end Q of the functional block BDJC41 and the state of the output end Q of the BDJC45 (namely the CMDn in the program) in the unit are equal to the state of the cut-to-length control cold test CMD8, and if the number of the output ends Q of the functional blocks BDJC41 and the output end Q of the BDJC45 is less than or equal to L m, the state isdWhen the output Q of the functional block BDJC42 in the cell changes from '0' state to '1' state, the state of the output Q of the functional block BDJC44 in the cell and the output Q of the BDJC45 (i.e., CMDn in the program) will be equal to the state of the cut-to-length control cold check CMD 9.
For determinationThe distance setting unit between the cold detection and the cold shearing is controlled by the cutting rule, and the control program of the unit can know that when the distance is less than or equal to 6m and is not more than LdIf the number of the output ends Q of the function blocks BDJC04 in the unit is less than 7m, the state of the output end Q of the function block BDJC04 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC05 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 3.5 meters (namely the distance between the cold-test CMD1 and the cold shears is controlled by the fixed-length shearing), and similarly, when the number of the output ends Q of the functiondWhen the number is less than 8m, the output end Q of the function block BDJC09 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC10 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 4.5 meters (namely the distance between the cold-test CMD2 and the cold shear is controlled by the fixed-length shear), and when the number is less than or equal to 8m and less than LdWhen the number is less than 9m, the output end Q of the function block BDJC14 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC15 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 5.5 meters (namely the distance between the fixed-length shearing control cold-detection CMD3 and the cold shearing), and when the number is less than or equal to 9m and less than or equal to L52dWhen the length is less than 10m, the output end Q of the function block BDJC19 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC20 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 6.5 meters (namely the distance between the fixed-length shearing control cold-detection CMD4 and the cold shearing), and when the length is less than or equal to 10m and less than or equal to LdWhen the distance is less than 11m, the output end Q of the function block BDJC24 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC25 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 7.5 meters (namely the distance between the cold-test CMD5 and the cold shear is controlled by the fixed-length shear), and when the distance is less than or equal to 11m and less than LdWhen the number is less than 12m, the output end Q of the function block BDJC29 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC30 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 8.5 meters (namely the distance between the fixed-length shearing control cold-detection CMD6 and the cold shearing), and when the number is less than or equal to 12m and less than or equal to L52 mdWhen the distance is less than 13m, the output end Q of the function block BDJC34 in the unit is changed from a '0' state to a '1' state, the output end Y of the function block BDJC35 and the output end Y of the BDJC46 in the unit (namely L CMDn in the program) are equal to 9.5 meters (namely the distance between the cold-test CMD7 and the cold shear is controlled by the fixed-length shear), and when the distance is less than or equal to 13m and less than or equal to LdIf the number of the output ends Q of the function blocks BDJC39 in the unit is less than 14m, the output end Q of the function block BDJC39 in the unit is changed from a '0' state to a '1' state, and the output end Q of the function block BDJC40 in the unit is changed from a '0' state to a '1' stateY and the output end Y of the BDJC46 (namely L CMDn in the program) are equal to 10.5 meters (namely the distance between the fixed-length shearing control cold detection CMD8 and the cold shearing) when 14m is less than or equal to LdIn the meantime, the output terminal Q of the functional block BDJC42 in the cell will change from '0' state to '1' state, and the output terminal Y of the functional block BDJC43 in the cell and the output terminal Y of the BDJC46 in the cell (i.e., L CMDn in the program) will be equal to 11.5 meters (i.e., the fixed-length shear controls the distance between the cold-inspection CMD9 and the cold shear).
For the head shearing control unit of the cold shearing bar, the control program of the control unit can know that when the cold detection CMD0 before cold shearing detects the head of the bar (namely the CMD0 state is changed from loss detection to detection), the output end Q of the function block BDJC66 in the unit generates t0A 1' pulse of duration, t0The bar head shearing device consists of two parts, wherein one part is formed by a distance (L CMD0) between a cold-detection CMD0 and a cold shear and a bar head shearing length (L) set by an HMI (human machine interface)HEAD) The sum is divided by a reference speed (V) based on the magnetic link plate before cold shearingZ) Then the ideal delay time of the cold shear bar head shearing start obtained by subtracting the cold shear start time (namely the time of starting the cold shear from the rest to the shearing point, the start time of the cold shear is about 1.25s), and the other part is the correction time △ t which can be set by the HMI operation picture0(△t0The correction value of the start delay time for the head shearing of the cold shearing bar) so that at t0When the output end Q of the functional block BDJC66 in the unit changes from '1' state to '0' state, the output end Q of the functional block BDJC68 in the unit (namely, the point C0 in the control program), the output ends Q of the functional blocks BDJC193 and BDJC195 generate '1' pulses of one program cycle period, and the output end Q of the functional block BDJC197 in the unit outputs a cold-shearing bar head shearing starting command with the duration of 100ms, so that the cold shearing start completes bar head shearing. As known by the control program of the control unit, when the output end Q (namely the point B0) of the functional block BDJC66 in the unit has '1' pulse required by the shearing of the head of the bar material, the output ends Q of the functional blocks BDJC55 and BDJC56 in the unit are subjected to the '1' pulseThe '1' state is changed into the '0' state until the cold shearing 'fixed-length shearing permission signal' is blocked after the whole bar is subjected to fixed-length shearing. In this way, during cold cut-to-length cutting, even if the cold CMD0 state flickers, the normal cut-to-length cutting of the cold shears is not affected, thereby improving the robustness of the cold cut-to-length cutting control program.
For a cold-shearing bar cut-to-length control unit, the control program of the control unit determines that when the cold-shearing bar cut-to-length is started (i.e. the C0 point in the control program generates a '1' pulse) under the condition that the 'cold-shearing cut-to-length shearing permission signal' and the 'cold-shearing head selection' are both in a '1' state, the output terminals Q of the functional blocks BDJC70 and BDJC71 in the cold-shearing bar cut-to-length control unit change from '0' to '1' state, so that when the cold-detection CMDn for the set cut-to-length control detects the moment when the bar head is changed from loss to detection (i.e. the CMDn state is changed from loss to detection), the output terminal Q of the functional block BDJC77 in the unit generates a '1' pulse with the duration of T1, the T1 consists of a part obtained by subtracting the difference between the cold-detection Dn distance (2 Dn) of the set bar cut-to the cold-detection Dn distance and the cold-detection cold-shearing start magnetic field (HMI) and the cold-cutting field cutting operation of the cold-shearing machine, and the cold-cutting control unit obtains a corrected CMDn time after the subtraction of the ideal cold-cutting time (HMI-cutting start time of the ideal-to obtain the ideal cold-cutting start time before-cutting time1，(△t1A delay time correction value is started for the first cut-to-length shearing of the cold-sheared bar), so that when the output terminal Q of the functional block BDJC77 in the unit changes from the '1' state to the '0' state after t1, the output terminal Q of the functional block BDJC79 in the unit (i.e., the point C1 in the control program), the output terminals BDJC193 and BDJC195 in the functional block BDJC193 and BDJC195 will generate a '1' pulse of one program cycle period, and the output terminal Q of the functional block BDJC197 in the unit will output a cut-to-length shearing start command of 100ms in length, thereby enabling the cold-shearing start to complete the 1 st cut-to-length shearing of the whole bar. As can be seen from the control program of the control unit, when the cold shearing fixed length shearing permission signal and the cold shearing head selection are both in the ' 1 ' state, the first fixed length shearing of the whole bar is started when the cold shearing is performed (namely, C1 point appears in the control program) '1 ' pulse), so that when the set cut length number of the whole bar has not reached (i.e. the CTR point in the control program is in the ' 1 ' state) and the cold-check CMDn for the set cut length control after cold shearing detects the head of the bar (i.e. the CMDn state changes from loss to check), the output Q of the functional block BDJC84 in the unit will generate a ' 1 ' pulse of time duration T2, which T2 consists of a portion of the ideal delay time (i.e. T in the control program) for the start of the cut length of the cold-sheared bar, and a portion of the corrected time △ T2 settable for the HMI operation picture, so that after T2 the output Q of the functional block BDJC84 in the unit changes from the ' 1 ' state to the ' 0 ' state, the output Q of the functional block BDJC86 in the unit (i.e. the C2 point in the control program), the functional block BDJC193 and the output Q of the BDJC195, which the functional block BDJC81 and the unit generate a cycle number of the cold-cut length of the bar is equal to the set by the control program, the output Q197, and the cold-cut length of the other unit of the cold-cut length of the set cut length of the cold-cut length of the bar cut length of the output of the control unit BDJC-cut length of the set stroke is set stroke of the bar reaches 100, which is equal to the control program, which the outputcut.d(HMI) the output QU of the counter function block BDJC177 in the unit will change from '0' to '1' state, and thus the output Q of the function block BDJC178 in the unit (i.e. the CTR point in the control program) will change from '1' to '0' state, thereby sending a full bar cut-to-length signal to the cold shear body control system.
(6) The method comprises the steps that a cold shearing bar fixed length roller way is used for carrying out fixed length shearing in the process of fast moving the bar, so that the head of the bar fixed length can be accurately identified for cold detection in the fixed length shearing control, and a 1# to 3# roller way needs to be accelerated for a short time (such as 1s) immediately after the cold shearing fixed length shearing, so that the effective separation of the tail of a just sheared fixed length and the head of the to-be-sheared fixed length can be realized without influencing the actual speed of a magnetic chain plate before cold shearing, therefore, a cold shearing bar fixed length head and tail quick separation control unit is arranged in a bar cold shearing fixed length shearing control program, the control program of the cold shearing bar fixed length head and tail quick separation control unit can know that when the cold shearing bar fixed length shearing control unit sends out a cold shearing starting signal, a function BDJC198 output end Q in the cold shearing bar fixed length head and tail quick separation control unit generates a 1 ' pulse with the duration of 2.3s, and a function BDJC 199Q in the unit generates a 1 ' pulse of a 1's, and a BDJC # 3# quick separation control unit which can output end Q of a BDJC # roller way to be used as an effective additional value of a reference speed after cold shearing roller way, so that the additional value of the cold shearing speed of the cold shearing roller way of the cold shearing of the original 1# roller way can be increased speed of the cold shearing roller way, and the cold shearing of the original # roller way, so that the cold shearing speed of the cold shearing of.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.

Claims (7)

1. A bar cold shearing scale cutting control system is characterized in that n scale cutting control cold detectors are arranged behind a cold shear, the distance between the first scale cutting control cold detector and the cold shear is L m, the distance between the remaining scale cutting control cold detectors is L n, and a bar cold shearing scale cutting control program comprises a scale cutting control cold detector selection unit, a scale cutting control cold detector and cold shear interval setting unit, a cold shear bar head cutting control unit and a cold shear bar scale cutting control unit;
the fixed-length shearing control cold detection selection unit automatically selects the corresponding fixed-length shearing control cold detection CMDn based on the set fixed-length shearing length;
the fixed-length shearing control cold detection and cold shear interval setting unit outputs the selected fixed-length shearing control cold detection CMDn and cold shear interval;
under the condition that the difference between the actual speed of the magnetic chain plate transmission motor and the reference speed before cold shearing is within +/-5% of the rated speed of the motor, and the 'cold shearing fixed length shearing permission signal' and the 'cold shearing head selection' are both in a '1' state, the cold shearing bar head shearing control unit obtains the time delay of bar head shearing starting, and sends a bar head shearing starting instruction to the cold shearing body control system after the time delay, and the cold shearing finishes the shearing of the bar head;
under the condition that "cold shear scale shear allowance signal" and "cold shear head select" all are in '1' attitude, cold shear bar scale shear the delay time that the control unit obtained the bar scale shear start, and after the delay time to cold shear body control system send bar scale shear start instruction, a bar scale shear is accomplished to the cold shear, whole bar scale shear number that sets for has not reached, and after the cold shear scale shear control cold check CMDn detect the bar head when, cold shear bar scale shear the control unit and carry out the next scale shear of bar, it equals the scale shear number N that sets for to the actual scale shear number of cold shear of the bar, the cold shear head selection is incut.dWhen the cutting is finished, a whole bar fixed-length cutting finishing signal is sent to a control system of the cold shear body;
the delay time of the cutting start of the head of the bar is the sum of two parts, the first part is the sum of the distance between the fixed-length cutting control cold inspection CMD0 and the cold shears before the cold shears and the set cutting length of the head of the bar, the sum is divided by the reference speed of the magnetic chain plate before the cold shears, then the cold shears start time is subtracted, and the second part is the set correction time △ t0The delay time of the fixed-length shearing start of the bar is the sum of two parts, the first part is the difference between the set fixed-length shearing length of the bar and the distance between the fixed-length shearing control cold inspection CMDn and the cold shear, the difference is divided by the reference speed of the magnetic chain plate before the cold shear, then the cold shear start time is subtracted, and the second part is the set correction time △ t.
2. The bar cold shear sizing shear control system of claim 1, further comprising: the control unit for rapidly separating the fixed-length head and the tail of the cold-sheared bar immediately accelerates the 1# -3 # roller way after cold shearing after fixed-length shearing for a short time, so that the tail of the fixed-length bar just sheared is separated from the head of the fixed-length bar to be sheared.
3. The rod material cold shearing fixed length shearing control system as set forth in claim 1, wherein the fixed length shearing control cold inspection selecting unit is composed of functional blocks BDJC 01-BDJC 04, BDJC 06-BDJC 09, BDJC 011-BDJC 014, BDJC 016-BDJC 019, BDJC 021-BDJC 024, BDJC 026-BDJC 029, BDJC 031-BDJC 034, BDJC 036-BDJC 039, BDJC041, BDJC042, BDJC044 and BDJC 045;
when 6m is less than or equal to LdWhen the number is less than 7m, the output end Q of the function block BDJC04 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC06 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD1, and when the number is less than or equal to 7m and less than or equal to LdWhen the number is less than 8m, the output end Q of the function block BDJC09 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC11 and the output end Q of the BDJC45 are equal to the state of the cold test CMD2 of the shear control with fixed length, and when the number is less than or equal to L and 8mdWhen the number is less than 9m, the output end Q of the function block BDJC14 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC16 and the output end Q of the BDJC45 are equal to the state of the cold testing CMD3 of the shear control with fixed length, and when the number is less than or equal to 9m and less than or equal to LdWhen the number is less than 10m, the output end Q of the function block BDJC19 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC21 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD4, and when the number is less than or equal to 10m and less than or equal to LdWhen the number is less than 11m, the output end Q of the function block BDJC24 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC26 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD5, and when the number is less than or equal to 11m and less than or equal to LdWhen the number is less than 12m, the output end Q of the function block BDJC29 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC31 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD6, and when the number is less than or equal to 12m and less than or equal to LdWhen the number is less than 13m, the output end Q of the function block BDJC34 is changed from '0' state to '1' state, the states of the output end Q of the function block BDJC36 and the output end Q of the BDJC45 are equal to the state of the cut-to-length shear control cold test CMD7, and when the number is less than or equal to 13m and less than or equal to Ld< 14m, the output Q of the functional block BDJC39 will be from'The 0 'state is changed into the 1' state, the states of the output end Q of the function block BDJC41 and the output end Q of the BDJC45 are equal to the state of the cut-to-length control cold test CMD8, and when 14m is less than or equal to LdWhen the output terminal Q of the functional block BDJC42 will change from '0' state to '1' state, the state of the output terminal Q of the functional block BDJC44 and the output terminal Q of the BDJC45 will equal the state of the cut-to-length control cold check CMD 9.
4. The system for controlling the cold shearing and the fixed-length shearing of the bar material according to claim 1, wherein the distance setting unit for controlling the cold shearing and the cold shearing between the fixed-length shearing and the cold shearing is composed of functional blocks BDJC 01-BDJC 05, BDJC 07-BDJC 10, BDJC 012-BDJC 015, BDJC 017-BDJC 020, BDJC 022-BDJC 025, BDJC 027-BDJC 030, BDJC 032-BDJC 035, BDJC 037-BDJC 040, BDJC042, BDJC043 and BDJC 046;
when 6m is less than or equal to LdWhen the number is less than 7m, the output end Q of the function block BDJC04 is changed from '0' state to '1' state, the output end Y of the function block BDJC05 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD1 and the cold shears, and when the number is less than or equal to 7m and less than or equal to LdWhen the length is less than 8m, the output end Q of the function block BDJC09 is changed from '0' state to '1' state, the output end Y of the function block BDJC10 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD2 and the cold shears, and when the length is less than or equal to L m, the distance is less than or equal to 8mdWhen the distance is less than 9m, the output end Q of the function block BDJC14 is changed from '0' state to '1' state, the output end Y of the function block BDJC15 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD3 and the cold shears, and when the distance is less than or equal to L m and less than 9mdWhen the length is less than 10m, the output end Q of the function block BDJC19 is changed from '0' state to '1' state, the output end Y of the function block BDJC20 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD4 and the cold shears, and when the length is less than or equal to L m, the distance is less than or equal to 10mdWhen the distance is less than 11m, the output end Q of the function block BDJC24 is changed from '0' state to '1' state, the output end Y of the function block BDJC25 and the output end Y of the BDJC46 are equal to the distance between the cold-shearing control CMD5 and the cold shears, and when the distance is less than or equal to 11m and less than or equal to LdWhen the distance is less than 12m, the output end Q of the function block BDJC29 is changed from '0' state to '1' state, the output end Y of the function block BDJC30 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD6 and the cold shears, and when the distance is less than or equal to 12m and less than or equal to LdWork at < 13mThe output end Q of the energy block BDJC34 is changed from '0' state to '1' state, the output end Y of the functional block BDJC35 and the output end Y of the BDJC46 are equal to the distance between the cold-shearing control CMD7 and the cold shears, and when the distance is less than or equal to 13m and less than or equal to LdWhen the number is less than 14m, the output end Q of the function block BDJC39 is changed from '0' state to '1' state, the output end Y of the function block BDJC40 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD8 and the cold shears, and when the number is less than or equal to 14m and less than or equal to LdIn the meantime, the output end Q of the functional block BDJC42 will change from '0' state to '1' state, and the output end Y of the functional block BDJC43 and the output end Y of the functional block BDJC46 will be equal to the distance between the cut-to-length shear control cold detection CMD9 and the cold shear, which is 11.5 meters.
5. The bar cold shear cut-to-length shear control system of claim 1, wherein the cold shear bar head shear control unit is composed of functional blocks BDJC 50-BDJC 68 and BDJC 193-BDJC 197;
under the condition that the difference between the actual speed of the magnetic chain plate transmission motor before cold shearing and the reference speed is within +/-5 percent of the rated speed of the motor and the 'cold shearing fixed-length shearing allowing signal' and 'cold shearing head selection' are both in a '1' state, when the cold detection CMD0 before cold shearing detects the head of a bar, namely the CMD0 state is changed from loss detection to detection time, the output end Q of the function block BDJC66 generates a t0A 1' pulse of duration, t0The method comprises the following steps of dividing the sum of the distance between the cold inspection CMD0 and the cold shears and the set shearing length of the head of the bar by the reference speed of the magnetic chain plate before the cold shears, then subtracting the starting time of the cold shears to obtain the ideal delay time of the head shearing start of the cold shears bar, and setting the settable correction time △ t0At t0When the output end Q of the back functional block BDJC66 is changed from a '1' state to a '0' state, the output ends Q of the functional blocks BDJC68, BDJC193 and BDJC195 generate a '1' pulse of a program cycle period, and the output end Q of the functional block BDJC197 outputs a cold shear bar head shearing starting command with the duration of 100ms, so that the cold shear is started to complete the bar head shearing; when the '1' pulse required for shearing the head of the bar appears at the output end Q of the functional block BDJC66, the output ends Q of the functional blocks BDJC55 and BDJC56 are enabled to be changed from '1'The state is changed into '0' state until the cold shearing 'fixed-length shearing permission signal' is blocked after the whole bar is subjected to fixed-length shearing.
6. The rod cold shear cut-to-length shear control system of claim 1, wherein the cold shear rod cut-to-length shear control unit is composed of functional blocks BDJC 69-BDJC 178 and BDJC 193-BDJC 197;
under the condition that the 'cold shear cut length shear allowance signal' and the 'cold shear head selection' are both in a '1' state, when the cold shear head of the cold shear bar is started, the output ends Q of the function blocks BDJC70 and BDJC71 are changed from '0' to '1' state, and when the cold-detection CMDn for the set cut length control after cold shearing detects the head moment of the bar, the output end Q of the function block BDJC77 generates a t11' pulse of duration, t1The method comprises the following steps that one part is the ideal delay time of the fixed-length shearing start of the cold-shearing bar material obtained by dividing the difference between the set fixed-length shearing length of the bar material and the distance between the cold-detected CMDn and the cold shears by the reference speed of a magnetic chain plate before the cold shears and then subtracting the cold shear start time, and the other part is the set correction time △ t1 at t1When the output end Q of the back functional block BDJC77 is changed from '1' state to '0' state, the output ends Q of the functional blocks BDJC79, BDJC193 and BDJC195 generate '1' pulses of a program cycle period, and the output end Q of the functional block BDJC197 outputs a cold shear bar fixed-length shear starting command with the duration of 100ms, so that the cold shear starting completes the 1 st fixed-length shearing of the whole bar, in the condition that the 'cold shear fixed-length shear allowing signal' and the 'cold shear head selection' are both in '1' state, when the cold shear starts to the first fixed-length shear of the whole bar, the output end Q of the functional block BDJC81 in the unit is changed from '0' state to '1' state, and when the set fixed-length shear number of the whole bar is not reached and the cold-inspection CMDn for the set-length shear control after the cold shear detects the head moment of the bar, the output end Q of the functional block BDJC84 in the unit generates a t21' pulse of duration, t2Comprises two parts, one part is the ideal delay time of the fixed-length shearing start of the cold shearing bar, and the other part is the set correction time △ t2When the output end Q of the function block BDJC84 is changed from a '1' state to a '0' state after t2, the output ends Q of the function blocks BDJC86, BDJC193 and BDJC195 generate a '1' pulse of a program cycle period, and the output end Q of the function block BDJC197 outputs a cold-shearing bar fixed-length shearing starting instruction with the duration of 100ms, so that the cold shearing start can complete the 2 nd fixed-length shearing of the whole bar; when the actual fixed-length shearing number of the cold shears is equal to the set fixed-length shearing number Ncut.dMeanwhile, the output end QU of the functional block BDJC177 is changed from '0' to '1' state, so that the output end Q of the functional block BDJC178 is changed from '1' to '0' state, and a signal that the whole bar is cut to length is sent to a cold shear body control system.
7. The rod material cold shearing fixed-length shearing control system as claimed in claim 1, wherein the cold shearing rod material fixed-length head-tail quick separation control unit is composed of functional blocks BDJC 198-BDJC 203;
when a cold shearing bar material sizing shearing control unit sends a cold shearing starting signal, the output end Q of a function block BDJC198 generates a 1 ' pulse with the duration of 2.3s, the output end Q of a function block BDJC199 generates a 1 ' pulse with the duration of 1s, during the 1 ' pulse of 1s, the output end Y of a function block BDJC200 outputs a 2V roller way reference speed additional value, and the roller way reference speed additional value is accumulated with the original reference speed of a 1# to 3# roller way after cold shearing through function blocks BDJC201 to BDJC203 and then is respectively used as the reference speed of the 1# to 3# roller way; therefore, after the cold shearing, the 1# to 3# roller ways can accelerate for a short time of 1 second after the cold shearing of the bar, and the tail part of the cut length just sheared can be effectively separated from the head part of the cut length to be sheared.
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