Automatic Control Method for Operating Speed ​​of Pickling Unit

Abstract

The present invention relates to an automatic control method for the operation speed of a pickling unit, and belongs to the technical field of metal rolling control methods. The present invention comprises the following steps: collecting the operation time of each process of the pickling unit, first calculating the inlet and outlet abnormal time, the inlet looper available time and the inlet looper out time in sequence according to the collected time data, and automatically controlling the operation speed of the pickling unit according to the comparison results of the inlet abnormal time with the inlet looper available time and the inlet looper out time; then calculating the outlet abnormal time, the outlet looper available time and the outlet looper filling time in sequence according to the collected time data, and automatically controlling the operation speed of the pickling unit according to the comparison results of the outlet abnormal time with the outlet looper available time and the outlet looper filling time; the present invention automatically adjusts the operation speed of the pickling process section according to whether there are abnormalities in the inlet section and the outlet section, thereby realizing the pickling process with few people or no people.

Description

Technical Field

[0001] The invention relates to an automatic control method for the running speed of a pickling machine group, and belongs to the technical field of metal rolling control methods. Background Art

[0002] Most of the high-strength steel used in the automotive and home appliance industries is produced by pickling units. The units adopt a continuous hydrochloric acid pickling process. The units consist of three parts: the inlet section, the pickling process section and the outlet section. The working process of the entire pickling unit is as follows: the raw steel coil is lifted from the raw material warehouse by a crane to the entrance walking beam saddle, transported to the steel coil trolley by the walking beam, transported by the steel coil trolley and rolled up to the uncoiler, and then straightened by the strip head plate shape, the strip head is sheared at the entrance, and welded with the strip tail of the previous coil by a welding machine. After that, the unit is tensioned and operated, and the strip enters the entrance looper. The strip exit looper enters the pickling process section and then enters the straightening machine for phosphorus removal and straightening. The strip enters the pickling tank for pickling and rinsing in the rinsing tank. The strip enters the inlet and outlet loopers, and then goes to the crescent shear and disc shear edge, and reaches the outlet shear. The outlet shear cuts the strip and then swings the tail to the coiler to tighten the strip. The finished coil is unloaded by the steel coil trolley and then transported to the finished product warehouse for packaging and shipment via the outlet steel coil trolley and the walking beam.

[0003] The entrance section and the pickling process section are connected by an entrance looper, and the pickling process section and the exit section are connected by an exit looper. The operating speed settings of the entrance section, pickling process section and exit section are all manually set by the operator according to the rhythm of the entrance section winding, the entrance looper quantity, the pickling process section rhythm, the exit looper quantity, the exit section trimming, and unloading. The pickling unit produces one roll every 3-5 minutes on average. The operator has to make manual adjustments frequently and take into account the actual production on site, which results in high labor intensity. This manual operation mode also has the problem that due to the uneven operating habits, skill levels, physical fitness, etc. of the four shifts of operators, it is inevitable that operating errors will cause production and quality losses. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to automatically control the operating speed of the pickling unit so that the pickling unit can operate unmanned and stably.

[0005] The technical solution proposed by the present invention is: a method for automatically controlling the running speed of a pickling unit, wherein the pickling unit comprises an inlet section, a pickling process section and an outlet section; the inlet section is composed of an unwinder, a straightener, an inlet shear, a welder and an inlet looper; the pickling process section is composed of a straightening machine, a pickling tank and a rinsing tank; the outlet section is composed of an outlet looper, a crescent shear, a disc shear, an outlet shear and a coiling unit, comprising the following steps:

[0006] Step 1: Collect the uncoiling time t1 of the uncoiling machine, the first threading time t2 of the strip head of the steel coil from the straightener to the inlet shear, the inlet shearing time t3 of the strip head from the inlet shear to the welder, the second threading time t4 of the strip head from the inlet shear to the welder, the welding time t5 of the welder, the first tail-swinging time t6 of the strip tail of the steel coil from the straightener to the inlet shear, and the second tail-swinging time t7 of the strip tail from the inlet shear to the welder;

[0007] Collect the advance and retreat time t8 of the circular shear, the exit shearing time t9 of the steel coil strip, and the exit tail swinging time t 10 and the strip head from the outlet shearing strip to the outlet stripping time t of the coiler 11 ;

[0008] Step 2: The entrance abnormal state time T1 of the entrance section is calculated by the following formula (1):

[0009]

[0010] In formula (1), is the unwinding time state parameter. When the unwinding time t1 is less than or equal to the unwinding critical time t 1max When Take 0, otherwise take 1, the decoiling critical time t 1max It is an empirical value, ranging from 42 to 60 seconds; is the first tape penetration time state parameter. When the first tape penetration time t2 is less than or equal to the first tape penetration critical time t 2max When the first threading time state parameter The first critical time t is 0, otherwise it is 1. 2max It is an empirical value, ranging from 20-40s; is the shear time state parameter. When the shear time t3 is less than or equal to the shear critical time t 3max When the shear time state parameter Take 0, otherwise take 1, the shear critical time t 3max It is an empirical value, ranging from 20-30s; is the second tape penetration time state parameter. When the second tape penetration time t4 is less than or equal to the second tape penetration critical time t 4max When the second threading time state parameter The value is 0, otherwise it is 1. The second critical time of penetration is t 4max It is an empirical value, ranging from 25-35s; It is the welding time state parameter. When the welding time t5 is less than or equal to the critical welding time t5max When the welding time state parameter Take 0, otherwise take 1, the critical welding time t 5max Time is an experience value, ranging from 30-60s; is the first drift time state parameter. When the first drift time t6 is less than or equal to the first drift critical time t 6max When the first drift time state parameter The value is 0, otherwise it is 1. The first tail-drift critical time t 6max It is an experience value, and the value range is 30-35s; is the second drift time state parameter. When the second drift time t7 is less than or equal to the second drift critical time t 7max When the second drift time state parameter The value is 0, otherwise it is 1. The second tail-drift critical time t 7max It is an empirical value, ranging from 40 to 60 seconds; T yr is the reserved processing time for the entry section to run, which is set based on historical experience and has a value range of 30-60s;

[0011] Step 3: Calculate the available time T of the inlet loop of the inlet section by the following formula (2): rt ,

[0012] T rt =((P r -5%)×L r ) / V1 (2),

[0013] In formula (2), P r is the actual sleeve volume of the inlet loop, which is a percentage value; L r is the loop length corresponding to each 1% looping amount of the inlet loop; V1 is the original set running speed of the pickling process section;

[0014] The exit speed of the inlet looper matches the running speed of the pickling process section; the exit speed of the inlet looper is reduced from the exit speed corresponding to the original set running speed V1 to the exit speed corresponding to the minimum running speed V3 of the pickling process section, and the entry looper is exited from the actual amount to 5% of the amount according to the exit speed corresponding to the minimum running speed V3. rtg , as shown in the following formula (3),

[0015]

[0016] In formula (3), a2 is the acceleration and deceleration of the pickling process section;

[0017] When the inlet abnormal state time T1 is less than the inlet loop available time T rt When the pickling process section is operated at the originally set operating speed V1;

[0018] When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And less than the entrance looper release time T rtg When the pickling process section is adjusted to the first running speed V2 r Running, the first running speed V2 r The calculation is as follows:

[0019] The first operating speed V2 r Substituting V3 into formula (3), and based on the premise that formula (3) is greater than formula (1), the following formula (4) is obtained:

[0020]

[0021] Convert the unit smaller than the value calculated on the right side of formula (4) to meter / minute and round it to the integer value as V2 r The value of

[0022] When the abnormal state time T1 of the inlet section is greater than the available time T of the inlet looper rt And it is greater than the entrance looper exit time T rtg When the pickling process section is operated at a minimum speed V3,

[0023] Step 4: Calculate the outlet abnormal state time T2 of the outlet section by the following formula (5):

[0024]

[0025] In formula (5), is the state parameter of the advance and retract time. When the advance and retract time t8 is less than or equal to the critical time t 8max When the tool advance and retract time state parameter Take 0, otherwise take 1, the critical time of the advance and retract time t 8max It is an empirical value, ranging from 20-40s; is the state parameter of the outlet shear time. When the outlet shear time t9 is less than or equal to the outlet shear critical time t 9max When the outlet shear time state parameter Take 0, otherwise take 1, the outlet shear critical time t 9max It is an empirical value, ranging from 15-30s; is the exit tail-flick time state parameter. When the exit tail-flick time t10 Less than or equal to the critical time t of exit tail swing 10max When the shear time state parameter Take 0, otherwise take 1, the exit tail-flick critical time t 10max It is an empirical value, ranging from 15-30s; is the state parameter of the outlet threading time. When the outlet threading time t 11 Less than or equal to the critical time t of the exit threading 11max When the outlet threading time state parameter Take 0, otherwise take 1, the critical time of the outlet through the belt t 11max It is an empirical value, ranging from 15 to 30 seconds; T yc is the reserved processing time for the exit section to run, which is set based on historical experience and has a value range of 30-60s;

[0026] Step 5: Calculate the available time T of the outlet loop of the outlet section by the following formula (6): ct ,

[0027] T ct =((95%-P c )×L c ) / V1 (6),

[0028] In formula (6), P c is the actual sleeve volume of the outlet loop, which is a percentage value; L c is the loop length corresponding to every 1% of the outlet loop;

[0029] The filling speed of the outlet looper matches the running speed of the pickling process section; the filling speed of the outlet looper is reduced from the filling speed corresponding to the original set running speed V1 to the filling speed corresponding to the minimum running speed V3 of the pickling process section, and the sleeve quantity of the outlet looper is filled from the actual sleeve quantity to 95% sleeve quantity according to the filling speed corresponding to the minimum running speed V3. ctg , as shown in the following formula (7),

[0030]

[0031] When the outlet abnormal state time T2 is less than the outlet loop available time T ct When the pickling process section is operated at the originally set operating speed V1;

[0032] When the outlet abnormal state time T2 is greater than the outlet loop available time T ct And less than the outlet loop filling time T ctgWhen the pickling process section is adjusted to the second running speed V2 c Running, the second running speed V2 c The calculation is as follows:

[0033] The second operating speed V2 c Substituting V3 into formula (7), and based on the premise that formula (7) is greater than formula (5), the following formula (8) is obtained:

[0034]

[0035] The unit of the calculated value on the right side of formula (8) is converted to meter / minute and the rounded value is taken as V2 c The value of

[0036] When the abnormal state time T2 of the outlet section is greater than the available time T ct And it is greater than the outlet loop filling time T ctg When the pickling process section is operated at the minimum operating speed V3,

[0037] When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And less than the entrance looper release time T rtg When the outlet abnormal state time T2 is greater than the outlet loop available time T ct And less than the outlet loop filling time T ctg , select the first running speed V2 r and the second operating speed V2 c The lower speed is used as the operating speed of the pickling process section.

[0038] Beneficial effects of the present invention: 1. Since the present invention provides an automatic control method for the operating speed of a pickling unit, the operating speed of the pickling process section is automatically adjusted according to whether there are abnormalities in the inlet section and the outlet section, so that the entire pickling process can be carried out automatically, realizing the pickling process with less people and no people. 2. Since a secondary adjustment process is added to the method of the present invention, when an abnormality occurs, there is no need to mechanically adjust the operating speed of the pickling process section to the minimum. Instead, on the premise of ensuring that the abnormality is resolved, the operating speed of the pickling process section is adjusted to the optimal level, so that the speed of the entire process is guaranteed, the pickling can be completed faster, and costs are saved. DETAILED DESCRIPTION

[0039] The automatic control method for the operating speed of the pickling unit of the present invention is further described below in conjunction with specific embodiments.

[0040] A method for automatically controlling the running speed of a pickling unit, wherein the pickling unit comprises an inlet section, a pickling process section and an outlet section; the inlet section is composed of an unwinder, a straightener, an inlet shear, a welder and an inlet looper; the pickling process section is composed of a straightening machine, a pickling tank and a rinsing tank; the outlet section is composed of an outlet looper, a crescent shear, a disc shear, an outlet shear and a coiling unit, and comprises the following steps:

[0041] Step 1: Collect the unwinding time t1 of the unwinding machine, the first threading time t2 of the strip head of the steel coil from the straightening machine to the entrance shear, the entrance shearing time t3 of the strip head from the entrance shear to the welding machine, the second threading time t4 of the strip head from the entrance shear to the welding machine, the welding time t5 of the welding machine, the first tail swinging time t6 of the strip tail of the steel coil from the straightening machine to the entrance shear, and the second tail swinging time t7 of the strip tail from the entrance shear to the welding machine;

[0042] Collect the advance and retreat time t8 of the circular shear, the exit shearing time t9 of the steel coil strip, and the exit tail swinging time t 10 The time t of the strip head from the exit shear to the exit of the coiler 11 ;

[0043] Step 2: Calculate the entrance abnormal state time T1 of the entrance section by the following formula (1):

[0044]

[0045] In formula (1), is the unwinding time state parameter. When the unwinding time t1 is less than or equal to the unwinding critical time t 1max hour, Take 0, otherwise take 1, the critical time of unwinding t 1max It is an empirical value, ranging from 42 to 60 seconds; is the first penetration time state parameter. When the first penetration time t2 is less than or equal to the first penetration critical time t 2max When the first threading time state parameter Take 0, otherwise take 1, the first critical time of penetration t 2max It is an empirical value, ranging from 20-40s; is the shear time state parameter. When the shear time t3 is less than or equal to the shear critical time t 3max When the shear time state parameter Take 0, otherwise take 1, shear critical time t 3max It is an empirical value, ranging from 20-30s; is the second penetration time state parameter. When the second penetration time t4 is less than or equal to the second penetration critical time t 4max When the second threading time state parameter Take 0, otherwise take 1, the second penetration critical time t4max It is an empirical value, ranging from 25-35s; It is the welding time state parameter. When the welding time t5 is less than or equal to the critical welding time t 5max When welding time state parameters Take 0, otherwise take 1, welding critical time t 5max Time is an experience value, ranging from 30-60s; is the first drift time state parameter. When the first drift time t6 is less than or equal to the first drift critical time t 6max When the first drift time state parameter Take 0, otherwise take 1, the first tail drift critical time t 6max It is an experience value, and the value range is 30-35s; is the second drift time state parameter. When the second drift time t7 is less than or equal to the second drift critical time t 7max When the second drift time state parameter Take 0, otherwise take 1, the second drift critical time t 7max It is an empirical value, ranging from 40 to 60 seconds; T yr It is the reserved processing time for the entry segment operation, which is set based on historical experience and has a value range of 30-60s;

[0046] Step 3: Calculate the available time T of the entrance looper of the entrance section by the following formula (2): rt ,

[0047] T rt =((P r -5%)×L r ) / V1 (2),

[0048] In formula (2), P r is the actual amount of the entrance loop, which is a percentage value; L r is the looper length corresponding to every 1% of the inlet looper; V1 is the original set running speed of the pickling process section;

[0049] The exit speed of the inlet looper matches the running speed of the pickling process section; the exit speed of the inlet looper is reduced from the exit speed corresponding to the original set running speed V1 to the exit speed corresponding to the minimum running speed V3 of the pickling process section, and the entry looper sleeve quantity is reduced from the actual sleeve quantity to the entry looper sleeve quantity of 5% sleeve quantity according to the exit speed corresponding to the minimum running speed V3. rtg , as shown in the following formula (3),

[0050]

[0051] In formula (3), a2 is the acceleration and deceleration of the pickling process section;

[0052] When the entrance abnormal state time T1 is less than the entrance loop available time T rt When the pickling process section is running at the original set speed V1;

[0053] When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And it is less than the entrance looper exit time T rtg When the pickling process section is adjusted, the steel coil is operated at the first speed V2 r Run, first run speed V2 r The calculation is as follows:

[0054] Set the first running speed V2 r Substituting V3 into formula (3), and based on the premise that formula (3) is greater than formula (1), we get the following formula (4):

[0055]

[0056] The derivation of formula (4) is as follows:

[0057]

[0058] Convert the unit smaller than the value calculated on the right side of formula (4) to meter / minute and round it to the integer value as V2 r The value of

[0059] When the abnormal state time T1 of the entrance section is greater than the available time T of the entrance looper rt And it is greater than the entrance looper exit time T rtg When the pickling process section is in operation, the operating speed is adjusted to the minimum operating speed V3;

[0060] Step 4: Calculate the abnormal state time T2 of the outlet section by the following formula (5):

[0061]

[0062] In formula (5), It is the state parameter of the advance and retract time. When the advance and retract time t8 is less than or equal to the critical time t 8max When the tool advance and retract time state parameters Take 0, otherwise take 1, the critical time of advance and retract time t 8max It is an empirical value, ranging from 20-40s; It is the state parameter of the outlet shear time. When the outlet shear time t9 is less than or equal to the outlet shear critical time t 9max When the state parameter of the outlet shear time is Take 0, otherwise take 1, the critical time of outlet shear t 9max It is an empirical value, ranging from 15-30s; is the exit tail-swing time state parameter. When the exit tail-swing time t 10 Less than or equal to the critical time t of exit tail swing 10max When the shear time state parameter Take 0, otherwise take 1, exit tail drift critical time t 10max It is an empirical value, ranging from 15-30s; is the state parameter of the outlet threading time. When the outlet threading time t 11 Less than or equal to the critical time t of the exit threading 11max When the exit threading time state parameter Take 0, otherwise take 1, the critical time of exit threading t 11max It is an empirical value, ranging from 15 to 30 seconds; T yc It is the reserved processing time for the exit section operation, which is set based on historical experience and has a value range of 30-60s;

[0063] Step 5: Calculate the available time T of the outlet loop of the outlet section by the following formula (6): ct ,

[0064] T ct =((95%-P c )×L c ) / V1 (6),

[0065] In formula (6), P c is the actual set quantity of the export looper, which is a percentage value; L c It is the length of the looper corresponding to every 1% of the export looper quantity;

[0066] The filling speed of the outlet looper matches the running speed of the pickling process section; the filling speed of the outlet looper is reduced from the filling speed corresponding to the original set running speed V1 to the filling speed corresponding to the minimum running speed V3 of the pickling process section, and the sleeve quantity of the outlet looper is filled from the actual sleeve quantity to 95% of the sleeve quantity according to the filling speed corresponding to the minimum running speed V3. The filling time T of the outlet looper ctg , as shown in the following formula (7),

[0067]

[0068] When the export abnormal state time T2 is less than the export loop available time T ct When the pickling process section is running at the original set speed V1;

[0069] When the export abnormal state time T2 is greater than the export loop available time T ct And less than the outlet loop filling time T ctg When the pickling process section is adjusted, the steel coil is operated at the second speed V2 cRun, second running speed V2 c The calculation is as follows:

[0070] Set the second running speed V2 c Substituting V3 into formula (7), and based on the premise that formula (7) is greater than formula (5), we get the following formula (8):

[0071]

[0072] The unit of the calculated value on the right side of formula (8) is converted to meter / minute and the rounded value is taken as V2 c The value of

[0073] The derivation process of formula (8) is consistent with that of formula (4).

[0074] When the abnormal state time T2 of the outlet section is greater than the available time T of the outlet loop ct And it is greater than the outlet loop filling time T ctg When the pickling process section is in operation, the operating speed is adjusted to the minimum operating speed V3;

[0075] When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And it is less than the entrance looper exit time T rtg When the outlet abnormal state time T2 is also greater than the outlet loop available time T ct And less than the outlet loop filling time T ctg , select the first running speed V2 r and the second operating speed V2 c The lower speed is used as the operating speed of the pickling process section.

Claims

1. A method for automatically controlling the running speed of a pickling unit, the pickling unit comprising an inlet section, a pickling process section and an outlet section; the inlet section is composed of an unwinder, a straightener, an inlet shear, a welder and an inlet looper; the pickling process section is composed of a straightening machine, a pickling tank and a rinsing tank; the outlet section is composed of an outlet looper, a crescent shear, a disc shear, an outlet shear and a coiling unit, characterized in that: The following steps are involved: Step 1: Collect the uncoiling time t1 of the uncoiling machine, the first threading time t2 of the strip head of the steel coil from the straightener to the inlet shear, the inlet shearing time t3 of the strip head from the inlet shear to the welder, the second threading time t4 of the strip head from the inlet shear to the welder, the welding time t5 of the welder, the first tail-swinging time t6 of the strip tail of the steel coil from the straightener to the inlet shear, and the second tail-swinging time t7 of the strip tail from the inlet shear to the welder; Collect the advance and retreat time t8 of the circular shear, the exit shearing time t9 of the steel coil strip, and the exit tail swinging time t 10 and the strip head from the outlet shearing strip to the outlet stripping time t of the coiler 11 ; Step 2: The entrance abnormal state time T1 of the entrance section is calculated by the following formula (1): In formula (1), is the unwinding time state parameter. When the unwinding time t1 is less than or equal to the unwinding critical time t 1max When Take 0, otherwise take 1, the decoiling critical time t 1max It is an empirical value, ranging from 42 to 60 seconds; is the first tape penetration time state parameter. When the first tape penetration time t2 is less than or equal to the first tape penetration critical time t 2max When the first threading time state parameter The first critical time t is 0, otherwise it is 1. 2max It is an empirical value, ranging from 20-40s; is the shear time state parameter. When the shear time t3 is less than or equal to the shear critical time t 3max When the shear time state parameter Take 0, otherwise take 1, the shear critical time t 3max It is an empirical value, ranging from 20-30s; is the second tape penetration time state parameter. When the second tape penetration time t4 is less than or equal to the second tape penetration critical time t 4max When the second threading time state parameter The value is 0, otherwise it is 1. The second critical time of penetration is t 4max It is an empirical value, ranging from 25-35s; It is the welding time state parameter. When the welding time t5 is less than or equal to the critical welding time t 5max When the welding time state parameter Take 0, otherwise take 1, the critical welding time t 5max Time is an experience value, ranging from 30-60s; is the first drift time state parameter. When the first drift time t6 is less than or equal to the first drift critical time t 6max When the first drift time state parameter The value is 0, otherwise it is 1. The first tail-drift critical time t 6max It is an experience value, and the value range is 30-35s; is the second drift time state parameter. When the second drift time t7 is less than or equal to the second drift critical time t 7max When the second drift time state parameter The value is 0, otherwise it is 1. The second tail-drift critical time t 7max It is an empirical value, ranging from 40 to 60 seconds; T yr is the reserved processing time for the entry section to run, which is set based on historical experience and has a value range of 30-60s; Step 3: Calculate the available time T of the inlet loop of the inlet section by the following formula (2): rt , T rt =((P r -5%)×L r ) / V1 (2), In formula (2), P r is the actual sleeve volume of the inlet loop, which is a percentage value; L r is the loop length corresponding to each 1% looping amount of the inlet loop; V1 is the original set running speed of the pickling process section; The exit speed of the inlet looper matches the running speed of the pickling process section; the exit speed of the inlet looper is reduced from the exit speed corresponding to the original set running speed V1 to the exit speed corresponding to the minimum running speed V3 of the pickling process section, and the entry looper is exited from the actual amount to 5% of the amount according to the exit speed corresponding to the minimum running speed V3. rtg , as shown in the following formula (3), In formula (3), a2 is the acceleration and deceleration of the pickling process section; When the inlet abnormal state time T1 is less than the inlet loop available time T rt When the pickling process section is operated at the originally set operating speed V1; When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And less than the entrance looper release time T rtg When the pickling process section is adjusted to the first running speed Running, the first running speed The calculation is as follows: The first operating speed Substituting V3 into formula (3), and based on the premise that formula (3) is greater than formula (1), the following formula (4) is obtained: The unit smaller than the calculated value on the right side of formula (4) is converted into meters per minute and the rounded value is used as The value of When the abnormal state time T1 of the inlet section is greater than the available time T of the inlet looper rt And it is greater than the entrance looper exit time T rtg When the pickling process section is operated at a minimum speed V3, Step 4: Calculate the abnormal state time T2 of the outlet section by the following formula (5): In formula (5), is the state parameter of the advance and retract time. When the advance and retract time t8 is less than or equal to the critical time t 8max When the tool advance and retract time state parameter Take 0, otherwise take 1, the critical time of the advance and retreat time t 8max It is an empirical value, ranging from 20-40s; is the state parameter of the outlet shear time. When the outlet shear time t9 is less than or equal to the outlet shear critical time t 9max When the outlet shear time state parameter Take 0, otherwise take 1, the outlet shear critical time t 9max It is an empirical value, ranging from 15-30s; is the exit tail-flick time state parameter. When the exit tail-flick time t 10 Less than or equal to the critical time t of exit tail swing 10max When the shear time state parameter Take 0, otherwise take 1, the exit tail-flick critical time t 10max It is an empirical value, ranging from 15-30s; is the state parameter of the outlet threading time. When the outlet threading time t 11 Less than or equal to the critical time t of the exit threading 11max When the outlet threading time state parameter Take 0, otherwise take 1, the exit belt critical time t 11max It is an empirical value, ranging from 15 to 30 seconds; T yc is the reserved processing time for the exit section to run, which is set based on historical experience and has a value range of 30-60s; Step 5: Calculate the available time T of the outlet loop of the outlet section by the following formula (6): ct , T ct =((95%-P c )×L c ) / V1(6), In formula (6), P c is the actual sleeve volume of the outlet loop, which is a percentage value; L c is the loop length corresponding to every 1% of the outlet loop; The filling speed of the outlet looper matches the running speed of the pickling process section; the filling speed of the outlet looper is reduced from the filling speed corresponding to the original set running speed V1 to the filling speed corresponding to the minimum running speed V3 of the pickling process section, and the sleeve quantity of the outlet looper is filled from the actual sleeve quantity to 95% sleeve quantity according to the filling speed corresponding to the minimum running speed V3. ctg , as shown in the following formula (7), When the outlet abnormal state time T2 is less than the outlet loop available time T ct When the pickling process section is operated at the originally set operating speed V1; When the outlet abnormal state time T2 is greater than the outlet loop available time T ct And less than the outlet loop filling time T ctg When the pickling process section is adjusted to the second running speed Run, the second running speed The calculation is as follows: The second running speed Substituting V3 into formula (7), and based on the premise that formula (7) is greater than formula (5), the following formula (8) is obtained: The value converted to meter / minute and rounded to the integer is the value less than the value calculated on the right side of formula (8) The value of When the abnormal state time T2 of the outlet section is greater than the available time T ct And it is greater than the outlet loop filling time T ctg When the pickling process section is operated at the minimum operating speed V3, When the entrance abnormal state time T1 is greater than the entrance loop available time T rt And less than the entrance looper release time T rtg When the outlet abnormal state time T2 is greater than the outlet loop available time T ct And less than the outlet loop filling time T ctg , select the first running speed and the second operating speed The lower speed is used as the operating speed of the pickling process section.

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