CN111421179B - Rod cold shearing fixed-length shearing control system - Google Patents
Rod cold shearing fixed-length shearing control system Download PDFInfo
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- CN111421179B CN111421179B CN202010241278.3A CN202010241278A CN111421179B CN 111421179 B CN111421179 B CN 111421179B CN 202010241278 A CN202010241278 A CN 202010241278A CN 111421179 B CN111421179 B CN 111421179B
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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
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- 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
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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
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 purpose, the invention adopts the technical scheme that: a bar cold shear scale shear control system, the system sets up n (n >3) scale shear control cold checks at the rear of cold shears, the first scale shear control cold check is Lm (set up based on the shortest set bar scale length) apart from the distance of cold shears, the distance between the remaining scale shear control cold checks is Ln (set up based on the shearing precision, the higher the shearing precision, the smaller the value of Ln, the general value is 1m), the bar cold shear scale shear control program includes: the device comprises a fixed-length shearing control cold inspection selection unit, a fixed-length shearing control cold inspection and cold shearing interval setting unit, a cold shearing bar head shearing control unit and a cold shearing 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 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 shearing start of the head of the bar is the sum of two parts, the first part is the sum of the distance between the cold shearing control cold inspection CMD0 and the cold shears before the cold shearing and the set shearing length of the head of the bar, the sum is divided by the reference speed of the magnetic chain plate before the cold shearing, then the cold shearing start time is subtracted, and the second part is the set correction time delta t0(ii) a The 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 detection 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 delta 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 LdIf the number of the output ends Q of the functional blocks BDJC04 is less than 7m, the state of the output end Q of the functional block BDJC06 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 and the output end Q of the functional block BDJC06 are equal to the state of the cut-to-length control cold test CMD 1; when 7m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC09 is less than 8m, the state of the output end Q of the functional block BDJC11 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 2; when 8m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC14 is less than 9m, the state of the output end Q of the functional block BDJC16 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 3; when 9m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC19 is less than 10m, the state of the output end Q of the functional block BDJC21 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 4; when 10m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC24 is less than 11m, the state of the output end Q of the functional block BDJC26 is changed from '0' state to '1' state, and the states of the output end Q of the functional block BDJC45 and the output end Q of the functional block BDJC26 are equal to the state of the cut-to-length control cold test CMD 5; when 11m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC29 is less than 12m, the state of the output end Q of the functional block BDJC31 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 6; when 12m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC34 is less than 13m, the state of the output end Q of the functional block BDJC36 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 7; when 13m is less than or equal to Ld< 14m, the output Q of the functional block BDJC39Will change from '0' state to '1' state, the state of output Q of functional block BDJC41 and output Q of BDJC45 will equal the state of cut-to-length shear control cold check CMD 8; 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.
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 more than or equal to 7m and less than or equal to LdWhen the distance between the output end Q of the functional block BDJC09 and the cold shears is less than 8m, the output end Q of the functional block BDJC09 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC10 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD2 and the cold shears; when 8m is less than or equal to LdIf the distance between the cold detection CMD3 and the cold shears is smaller than 9m, the output end Q of the function block BDJC14 is changed from a '0' state to a '1' state, and 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 shear control CMD3 and the cold shears; when 9m is less than or equal to LdIf the distance between the cold detection CMD4 and the cold shears is smaller than 10m, the output end Q of the functional block BDJC19 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC20 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control CMD4 and the cold shears; when 10m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC24 and the cold shears is less than 11m, the output end Y of the functional block BDJC25 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD5 and the cold shears; when 11m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC29 and the cold shears is less than 12m, the output end Q of the functional block BDJC29 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC30 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD6 and the cold shears; when 12m is less than or equal to LdIf < 13m, the output Q of the function block BDJC34 changes from '0' state to '1' state, the output Y of the function block BDJC35 and the output end of BDJC46Y will be equal to the distance between the cut-to-length shear control cold check CMD7 and the cold shear; when 13m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC39 and the cold shears is less than 14m, the output end Y of the functional block BDJC40 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD8 and the cold shears; when 14m is 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: one part is the ideal delay time of the head shearing start of the cold shearing bar material obtained by dividing the sum of the distance between the cold inspection CMD0 and the cold shearing and the set bar head shearing length by the reference speed of the magnetic chain plate before the cold shearing and then subtracting the cold shearing start time; another part is a settable correction time Deltat0At 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 device consists of two parts: one part is the ideal delay time of the cold shearing bar cut-to-length shearing start obtained by dividing the difference between the set bar cut-to-length shearing length and the cold-detection distance CMDn from the cold shears by the reference speed of the magnetic chain plate before the cold shears and then subtracting the cold shears starting time, and the other part is the set correction time delta 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, t2The device consists of two parts: one part is the ideal delay time for the fixed-length shearing start of the cold shearing bar; the other part is set correction time Deltat 2, when the output end Q of the function block BDJC84 changes from '1' state to '0' state after t2, the output ends Q of the function blocks BDJC86, BDJC193 and BDJC195 generate '1' pulses of one program cycle period, and the output end Q of the function block BDJC197 outputs a cold-shearing bar fixed-length shearing starting command with the duration of 100ms, so that the cold shearing starting is finished by the 2 nd fixed-length shearing starting command of the whole barShearing; 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.
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 the control program for cold shear sizing of bar material, where FIG. 3 is composed of FIGS. 3(a), 3(b), 3(c) and FIG. 3(d), in FIG. 3, LVM is a "bidirectional value out-of-tolerance detection" function block, in the case of HY ═ 0, QU is '1' when X ≧ M + L, QM is '1' when M-L < X < M + L, and QL is '1' when X ≦ M-L; NCM is the "numerical comparison" function block, QU is ' 1 ' when X1 > X2, ' QE is ' 1 ' when X1 ═ X2, and QL is ' 1 ' when X1 < X2; RSR is an RS trigger function block with preferential reset end R, when S is '1' and R is '0', Q is '1', QN is '0', when S is '1' and R is '1', Q is '0', QN is '1', when S is '0' and R is '0', Q and QN are kept in original states, when S is '0' and R is '0', Q is '0' and QN is '1'; CTR is a function block of a bidirectional counter, IU and ID are respectively a forward and reverse counting pulse input end, R and S are respectively a reset end and a set end of a counter count value, SV is a set value of the counter, LU and LL are respectively upper and lower limits of the counter count value, and when the counter count value of the counter reaches the upper limit value, QU is '1', otherwise QU is '0'; NSW is a "digital input switch" function block, and when I is '1', Y is X2, and when I is '0', Y is X1; BSW is'A switching value input selector switch function block, wherein when I is equal to '1', Q is equal to I2, and when I is equal to '0', Q is equal to I1; SUB is a subtracter functional block; ADD is an adder function block; MUL is a 'multiplier' functional block; DIV is the "Divider" function block; ETE is a function block of 'front and back edge identification', when an input end I is changed from a '0' state to a '1' state, the QP end only outputs a positive pulse with the length of 1 cycle period, and the QP end is kept in a '0' state under other states. When the input end I is changed from a '1' state to a '0' state, the QN end only outputs a positive pulse with the length of 1 cycle period, and the QN end is kept in the '0' state under the other states; the MFP is a function block of a fixed-width pulse generator, when an input end I is changed from a '0' state to a '1' state, a Q end outputs 1 positive pulse with a time length of T, and during the period that the Q end outputs the positive pulse, the state change of the input end I does not affect the output state of the Q end; PDE is a 'leading edge delay' functional block; OR is an OR gate; AND is an AND gate; NOT is a NOT gate; RGJ is the function block of acceleration and deceleration controller. L isHEAD(HMI) crop length set for HMI picture; l isd(HMI) a fixed length set for an HMI operation picture; CMDn is the nth cold inspection after cold shearing; LCMDN is the distance between the nth cold inspection and the cold shearing after the cold shearing; n is a radical ofMSTR.D.refThe reference speed of the magnetic chain plate driving motor before cold shearing; 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; delta NGSFThe added value of the reference speed of the 1# to 3# roller way after cold shearing; n is a radical of1#GF.ref.Is the final 1# roller way after cold shearingA reference speed; 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 movement of the bar always has deviation from the actual speed, so that for the method for controlling the cold detection of the fixed-length shearing by the fixed-length shearing control system based on the fixed-length shearing, the theoretical calculation speed of the movement of the bar and the corresponding delay time to obtain the fixed-length shearing length of the cold shearing, 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 characterized in that a group (nine in total) of fixed-length shearing control cold tests (as shown in fig. 2) are arranged after cold shearing, and are respectively used for shearing of different fixed lengthsAnd (5) controlling. Because the maximum moving speed of the bar on the conveying roller way after the cold shearing can reach 1.7m/s and the time from the cold shearing to the shearing point is about 1.25s, the length of the bar (L for short) is set to be 6m or mored) 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 L being more than or equal to 6md＜7m、7m≤Ld＜8m、8m≤Ld＜9m、9m≤Ld＜10m、10m≤Ld＜11m、11m≤Ld＜12m、12m≤Ld＜13m、13m≤LdLess than 14m and 14m < LdThe rod material fixed length shearing control. Based on the control, the cold shearing and sizing control system needs to automatically select the corresponding sizing shearing to control cold inspection according to the sizing shearing length set by the HMI operation picture aiming at different sizing shearing control. For this purpose, a cut-to-length cutting control cold check selection means is provided in the cold-cut-to-length cutting control program. The control program of the cold detection selection unit for controlling the cut-to-length shear can know that when the length of L is more than or equal to 6mdIf the number of the output ends Q of the functional blocks BDJC04 in the unit is less than 7m, the state of the output end Q of the functional block BDJC06 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 1. Similarly, when L is more than or equal to 7mdIf the number of the output ends Q of the functional blocks BDJC09 in the unit is less than 8m, the state of the output end Q of the functional block BDJC11 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 2; when 8m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC14 in the unit is less than 9m, the state of the output end Q of the functional block BDJC16 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 3; when the distance Ld is less than or equal to 9m and less than or equal to 10m, the output end Q of the function block BDJC19 in the unit is changed from a '0' state to a '1' state, and the states of the output end Q of the function block BDJC21 and the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 4; when 10m is less than or equal to LdWhen less than 11m, the functional block in the unitThe output terminal Q of the BDJC24 will change from '0' state to '1' state, and the state of the output terminal Q of the functional block BDJC26 and the output terminal Q of the BDJC45 (i.e. CMDn in the program) in the unit will be equal to the state of the cut-to-length control cold check CMD 5; when 11m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC29 in the unit is less than 12m, the state of the output end Q of the functional block BDJC31 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 6; when 12m is 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 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 7; when 13m is less than or equal to LdIf 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 in the unit and the state of the output end Q of the BDJC45 in the unit (namely the CMDn in the program) are equal to the state of the cut-to-length control cold check CMD 8; when 14m is less than or equal to LdWhen 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 the unit for controlling the distance between the cold detection and the cold shearing for the fixed-length shearing, the control program of the unit can know that L is more than or equal to 6mdIf the distance between the output end Q of the functional block BDJC04 in the unit is less than 7m, the state of the output end Q of the functional block BDJC04 in the unit is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC05 and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 3.5 meters (namely the distance between the fixed-length shearing control cold-test CMD1 and the cold shears). Similarly, when L is more than or equal to 7mdIf the distance between the cold-test CMD2 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC09 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC10 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 4.5 meters (namely the distance between the CMD2 and the cold shears is controlled in a fixed-length shearing mode); when 8m is less than or equal to LdIf the length is less than 9m, the output end Q of the function block BDJC14 in the unit is changed from '0' state to '1' state, and the output end Y of the function block BDJC15 and the output end Y of the function block BDJC46 in the unit (namely LCMDN in the program) are equal to 5.5 meters (namely CMD for shear control cold test with fixed length3 and the distance between the cold shears); when 9m is less than or equal to LdIf the distance between the cold test CMD4 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC19 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC20 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in a program) are equal to 6.5 meters; when 10m is less than or equal to LdIf the distance between the cold-test CMD5 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC24 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC25 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 7.5 meters (namely the distance between the CMD5 and the cold shears is controlled to be in a fixed-length shearing mode); when 11m is less than or equal to LdIf the distance between the cold-test CMD6 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC29 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC30 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 8.5 meters (namely the distance between the CMD6 and the cold shears is controlled in a fixed-length shearing mode); when 12m is less than or equal to LdIf the distance between the cold-test CMD7 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC34 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC35 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 9.5 meters (namely the distance between the CMD7 and the cold shears is controlled in a fixed-length shearing mode); when 13m is less than or equal to LdIf the distance between the cold-test CMD8 and the cold shears is controlled to be in a fixed-length shearing mode, the output end Q of the functional block BDJC39 in the unit is changed from a '0' state to a '1' state, the output end Y of the functional block BDJC40 in the unit and the output end Y of the BDJC46 in the unit (namely LCMDN in the program) are equal to 10.5 meters (namely the distance between the CMD8 and the cold shears is controlled in a fixed-length shearing mode); 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 functional block BDJC46 (i.e., LCMDn in the program) will be equal to 11.5 meters (i.e., the distance between the cut-to-length shear control cold check 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 device consists of two parts: part of the bar head shearing length (L) set by the cold check CMD0 distance from the cold shear (LCMD0) and HMIHEAD) The sum is divided by a reference speed (V) based on the magnetic link plate before cold shearingZ) Then subtracting the ideal delay time of the head shearing start of the cold shearing bar obtained by the cold shearing start time (namely the time of starting the cold shearing from the rest to the shearing point, wherein the start time of the cold shearing is about 1.25 s); the other part is a correction time Deltat 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. It can be known from the control program of the control unit that when the output Q of the functional block BDJC66 in the unit (i.e. point B0 in the control program) has a '1' pulse required for cutting the head of the bar, the output Q of the functional blocks BDJC55 and BDJC56 in the unit will change from '1' state to '0' state until the cold shear 'cut-to-length allowance signal' is blocked after the cut-to-length of the whole bar is finished. 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 the cold-shearing fixed-length shearing control unit, the control program of the control unit indicates that when the cold-shearing fixed-length shearing permission signal and the cold-shearing head selection are both in the '1' state, when the cold-shearing head is started (namely, a '1' pulse appears at the point C0 in the control program), the output terminals Q of the functional blocks BDJC70 and BDJC71 in the cold-shearing fixed-length shearing control unit are changed from '0' to '1' state. Thus, when the cold-detected CMDn for the set cut-to-length control after cold shearing detects the head of the bar (i.e., the CMDn status changes from loss to detected)The output Q of the functional block BDJC77 in this cell will generate a '1' pulse of duration t1, this t1 consisting of two parts: one part is the ideal delay time (namely T in the control program) of the fixed-length shearing start of the cold shearing bar, which is obtained by dividing the difference between the fixed-length shearing length (Ld) of the bar and the distance (LCMDn) between the cold-detected CMDn and the cold shearing by the reference speed (VZ) of the magnetic chain plate before the cold shearing and then subtracting the cold shearing start time (the cold shearing is about 1.25 s); the other part is a correction time Deltat which can be set by the HMI operation picture1，(△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. It can be known from the control program of the control unit that, in the case that the "cold shear cut-to-length shear enable signal" and the "cold shear head selection" are both in the '1' state, when the cold shear starts the first cut-to-length shear of the whole bar (i.e. the '1' pulse occurs at point C1 in the control program), the output Q of the function block BDJC81 in the unit will change from '0' to '1' state. Thus, when the set cut-to-length number of the whole bar does not reach (i.e. the CTR point in the control program is in the '1' state) and the cold-check CMDn for the set cut-to-length control detects the head of the bar (i.e. the CMDn state changes from loss to detection) after cold-shearing, the output Q of the function block BDJC84 in the unit will generate a '1' pulse with a duration of t2, and t2 consists of two parts: one part is the ideal delay time (namely T in the control program) for starting the fixed-length shearing of the cold shearing bar; the other part is a correction time Deltat 2 which can be set by the HMI operation picture. Thus, when the output Q of the functional block BDJC84 in the cell changes from the '1' state to the '0' state after t2, the output Q of the functional block BDJC86 in the cell (i.e., the point C2 in the control program), the output Q of the functional block BDJC193, and the output Q of the BDJC195 will generate a '1' pulse for one program cycle period, while the output Q of the functional block BDJC84 in the cell will generate a '1' pulseAn output end Q of the JC197 outputs a cold-shearing bar material fixed-length shearing starting instruction with the duration of 100ms, so that the cold shearing is started to finish the 2 nd fixed-length shearing of the whole bar material. In the same way, other shear control with set fixed length can be obtained for the whole bar. The control unit controls the program to determine that the actual fixed-length cutting number of the cold shears is equal to the fixed-length cutting number N set by the HMI operation screencut.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 cold shearing is to carry out the cut-to-length shearing in the process of fast moving the bar, so for the convenience of controlling the cold detection of the cut-to-length shearing, the head of the cut-to-length bar can be accurately identified, and the 1# to 3# roller way needs to be accelerated for a short time (such as 1s) immediately after the cold shearing and the cut-to-length shearing, so that the effective separation of the tail of the cut-to-length bar and the head of the cut-to-length bar can be realized without influencing the actual speed of the magnetic chain plate before the cold shearing. For this reason, a cold-shearing rod fixed-length head-tail quick separation control unit is arranged in the rod cold-shearing fixed-length shearing control program. According to the control program of the cold-shearing rod fixed-length head-tail rapid separation control unit, when the cold-shearing rod fixed-length shearing control unit sends a cold-shearing starting signal, the output end Q of the functional block BDJC198 in the cold-shearing rod fixed-length head-tail rapid separation control unit generates a 1 ' pulse with the duration of 2.3s, the output end Q of the functional block BDJC199 in the cold-shearing rod fixed-length head-tail rapid separation control unit generates a 1 ' pulse with the duration of 1s, during the 1 ' pulse of the 1s, the output end Y of the functional block BDJC200 in the unit (namely, delta NGSF in the program) outputs a 2V roller bed reference speed additional value, and therefore, the unit respectively adds the roller bed reference speed additional value with the original reference speed of the 1-3 # roller bed after cold shearing through the functional blocks BDJC 201-BDJC 203 and then respectively uses the roller bed reference speed as the reference speeds of the 1-3 # roller beds. Therefore, after 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 based on the acceleration, the tail part of the cut length to be cut can be effectively separated from the head part of the cut length to be cut.
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. The utility model provides a bar cold shears scale shear control system which characterized in that, the system sets up n scale shear control cold checks at the rear of cold shears, and the distance of first scale shear control cold check apart from the cold shears is Lm, and the distance between the cold check of remaining scale shear control is Ln, and bar cold shears scale shear control program includes: the device comprises a fixed-length shearing control cold inspection selection unit, a fixed-length shearing control cold inspection and cold shearing interval setting unit, a cold shearing bar head shearing control unit and a cold shearing 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 the cold shearing fixed-length shearing allowing signal and the cold shearing head selection are both in a '1' state, the cold shearing rod fixed-length shearing control unit obtains the delay time for starting the rod fixed-length shearing, and sends a rod fixed-length shearing starting instruction to the cold shearing body control system after the delay time, the cold shearing unit finishes the fixed-length shearing of one rod, the fixed-length shearing number of the whole set rod is not reached, and the cold shearing head selection is in a '1' stateWhen the sheared fixed-length shearing control cold detection CMDn detects the head of the bar, the cold shearing bar fixed-length shearing control unit carries out next fixed-length shearing on the bar until the actual fixed-length shearing number of the cold shears is equal to the set fixed-length shearing 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 shearing start of the head of the bar is the sum of two parts, the first part is the sum of the distance between the cold shearing control cold inspection CMD0 and the cold shears before the cold shearing and the set shearing length of the head of the bar, the sum is divided by the reference speed of the magnetic chain plate before the cold shearing, then the cold shearing start time is subtracted, and the second part is the set correction time delta t0(ii) a The 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 detection 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 delta 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 LdIf the number of the output ends Q of the functional blocks BDJC04 is less than 7m, the state of the output end Q of the functional block BDJC06 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 and the output end Q of the functional block BDJC06 are equal to the state of the cut-to-length control cold test CMD 1; when 7m is less than or equal to LdBelow 8m, the output Q of the functional block BDJC09 will beThe '0' state changes to the '1' state, and the states of the output terminal Q of the functional block BDJC11 and the output terminal Q of the BDJC45 will equal the state of the cut-to-length control cold check CMD 2; when 8m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC14 is less than 9m, the state of the output end Q of the functional block BDJC16 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 3; when 9m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC19 is less than 10m, the state of the output end Q of the functional block BDJC21 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 4; when 10m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC24 is less than 11m, the state of the output end Q of the functional block BDJC26 is changed from '0' state to '1' state, and the states of the output end Q of the functional block BDJC45 and the output end Q of the functional block BDJC26 are equal to the state of the cut-to-length control cold test CMD 5; when 11m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC29 is less than 12m, the state of the output end Q of the functional block BDJC31 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 6; when 12m is less than or equal to LdIf the number of the output ends Q of the functional blocks BDJC34 is less than 13m, the state of the output end Q of the functional block BDJC36 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 7; when 13m is 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 is changed to a '1' state from a '0' state, and the states of the output end Q of the functional block BDJC45 are equal to the state of the cut-to-length control cold test CMD 8; 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 less than 7m, function block BDJC04The output end Q of the functional block BDJC05 and the output end Y of the functional block BDJC46 are equal to the distance between the fixed-length shearing control cold-detection CMD1 and the cold shearing when the output end Q is changed from '0' state to '1' state, and when the distance between the fixed-length shearing control CMD1 and the cold shearing is less than or equal to L and less than 7mdWhen the distance between the output end Q of the functional block BDJC09 and the cold shears is less than 8m, the output end Q of the functional block BDJC09 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC10 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD2 and the cold shears; when 8m is less than or equal to LdIf the distance between the cold detection CMD3 and the cold shears is smaller than 9m, the output end Q of the function block BDJC14 is changed from a '0' state to a '1' state, and 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 shear control CMD3 and the cold shears; when 9m is less than or equal to LdIf the distance between the cold detection CMD4 and the cold shears is smaller than 10m, the output end Q of the functional block BDJC19 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC20 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control CMD4 and the cold shears; when 10m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC24 and the cold shears is less than 11m, the output end Y of the functional block BDJC25 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD5 and the cold shears; when 11m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC29 and the cold shears is less than 12m, the output end Q of the functional block BDJC29 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC30 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD6 and the cold shears; when 12m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC34 and the cold shears is less than 13m, the output end Q of the functional block BDJC34 is changed from a '0' state to a '1' state, and the output end Y of the functional block BDJC35 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD7 and the cold shears; when 13m is less than or equal to LdIf the distance between the output end Q of the functional block BDJC39 and the cold shears is less than 14m, the output end Y of the functional block BDJC40 and the output end Y of the BDJC46 are equal to the distance between the fixed-length shear control cold-test CMD8 and the cold shears; when 14m is 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 device consists of two parts: one part is the ideal delay time of the head shearing start of the cold shearing bar material obtained by dividing the sum of the distance between the cold inspection CMD0 and the cold shearing and the set bar head shearing length by the reference speed of the magnetic chain plate before the cold shearing and then subtracting the cold shearing start time; another part is a settable correction time Deltat0At 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.
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 device consists of two parts: a part is setDividing the difference between the length of the cut-to-length bar and the distance between the cold-detected CMDn and the cold shears by the reference speed of the magnetic chain plate before cold shears, subtracting the ideal delay time of the cut-to-length shear start of the cold shears bar obtained by the cold shear start time, and setting the correction time delta 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, t2The device consists of two parts: one part is the ideal delay time for the fixed-length shearing start of the cold shearing bar; the other part is set correction time Deltat 2, when the output end Q of the function block BDJC84 changes from a '1' state to a '0' state after t2, the output ends Q of the function blocks BDJC86, BDJC193 and BDJC195 generate '1' pulses of one program cycle period, and the output end Q of the function block BDJC197 outputs a cold-shearing bar fixed-length shearing starting command with the time length of 100ms, so that the cold shearing starting completes 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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| CN112756692B (en) * | 2020-12-25 | 2022-06-24 | 中重科技(天津)股份有限公司 | Cold sawing process for section steel |
| CN114700553B (en) * | 2022-05-20 | 2023-05-09 | 宝武集团鄂城钢铁有限公司 | Automatic double-collection system and method for fixed-length materials |
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