A warning control method for coiling side guard

Abstract

The invention discloses a coiling side guide early warning control method, and relates to a production coiling process for hot-rolled strip steel. In order to effectively eliminate the occurrence of the sickle bend of the head of the hot-rolled strip steel and the over-width collision with the coiling entrance guide, the coiling side guide early warning control method of the invention measures, calculates and adjusts the values ​​of the over-width and sickle bend of the strip steel, gives the deviation value according to the empirical formula, and then performs the detection control logic judgment according to the sum of the deviation values, realizes the short-stroke triggering of the side guide, and after all the entrance guides execute the short-stroke action according to the logic to coil the load, the waiting position is restored, so that the head of the strip steel with sickle bend and over-width can pass through the coiling guide area and smoothly enter the coiling machine mandrel for coiling, eliminating the collision folding and the jamming of the guide steel pile accidents.

Description

Technical Field

[0001] The present invention relates to a coiling process for hot-rolled strip steel, and specifically to a warning control method for the coiling side guard. Background Art

[0002] The hot continuous rolling production process of strip steel is divided into four major areas: heating furnace, roughing mill, finishing mill, and coiler. The normal hot-rolling production process is that the slab is heated in the heating furnace and then reversibly rolled through different passes by a two-stand roughing mill unit, and then continuously rolled into strip steel by a seven-stand finishing mill unit. After passing through laminar cooling, the strip steel is forced to be centered by the front guard before coiling and guided into the coiler mandrel of the underground coiler through the upper and lower pinch rolls to form a coil, and finally transported to the transportation line by the coil unloading trolley and hoisted into the finished product warehouse.

[0003] After finishing rolling, the head of the strip steel often has a camber due to uneven deformation during finishing rolling, which hits the coiling side guard and causes folded scrap steel. For example, Figure 1 , which refers to the malignant steel piling accident that the strip steel fails to enter the coiler pinch rolls through the forced centering and guiding action of the front side guard before coiling, but accumulates at the side guard. And due to the incoming material width exceeding the limit or the free width expansion being too large and exceeding the preset +α compensation value of the coiling side guard, the head of the over-wide strip steel is blocked at the coiling side guard to form folded scrap steel. For example, Figure 2 , which refers to the malignant steel piling accident that the strip steel fails to enter the coiler pinch rolls through the forced centering and guiding action of the front side guard before coiling, but folds at the side guard.

[0004] The Chinese patent with the publication number CN111940542A proposes a method and device for coiling strip steel, and discloses a method for eliminating folding marks generated by camber in the coiling area during hot-rolled finishing. Camber refers to the maximum distance between the side edge of the steel strip and the straight line connecting the two end points of the measured part, that is, the deviation of the edge of one side of the strip steel from the straight line. If the camber of the strip steel head is too large (such as exceeding 60 mm), after the camber is corrected by the coiling inlet side guide plate, local warping will occur and then after being rolled by the pinch rolls, it is easy to cause folding defects in the strip steel. This invention mainly reduces the probability of folding marks generated by the pinch rolls in the position control of the folded bite after the camber of the strip steel head is forced to be centered by the side guard by controlling the pinch roll pressure and position mode usage and the short-stroke control of the front side guard before coiling. However, this patent does not involve the influence and control of camber, over-width, impact with the side guard, and blocked scrap steel.

[0005] The Chinese patent with the publication number CN109127733A proposes a method for rectifying the coiler side guide plate, and discloses a method for rectifying the head camber of the strip in real time to facilitate its smooth entry into the 2# coiler. That is, the computer system judges the head camber of the strip at the laminar outlet, and calculates the action amount of the 1# side guide plate in real time according to the camber offset, and performs unilateral rectification of the 1# side guide plate to avoid waste steel caused by the head camber of the strip being blocked at the inlet of the 2# side guide plate. However, this patent does not involve the influence and control of waste steel when camber and ultra-width act on the guide device at the same time, nor does it clarify and control the calculation of the combined action of camber and ultra-width. At the same time, it does not involve the 3# control logic of the coiler either. Summary of the Invention

[0006] In order to overcome the defects and deficiencies existing in the prior art, the present invention discloses a coiling side guide warning control method. Through this control method, the occurrence of accidents such as the head camber of the hot-rolled strip and the impact of ultra-width on the coiling inlet guide device can be effectively eliminated. This method does not require equipment modification and is simple and effective.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A coiling side guide warning control method, and its warning control method includes the following steps:

[0009] S1: Ultra-width adjustment: Before the strip head reaches the 4th group of the laminar raceway, the PLC collects the data of the width gauge at the exit of the existing finishing mill and sends it to the instrument PC in real time. The instrument PC performs arithmetic processing on the data and gives a deviation value ΔX to the PLC, which is added to the position of the short-stroke opening compensation value of the newly added side guide plate for automatic adjustment at the preset position;

[0010] S2: Camber adjustment: Before the strip head reaches the 4th group of the laminar raceway, the PLC collects the data of the multi-functional instrument at the exit of the existing finishing mill and sends it to the instrument PC in real time. The instrument PC performs arithmetic processing on the data and gives a deviation value ΔY to the PLC, which is added to the position of the short-stroke opening compensation value of the newly added side guide plate for automatic adjustment at the preset position;

[0011] S3: Ultra-width and camber adjustment: The measured data is determined to be 30 meters according to the actual on-site experience. After the head reaches the laminar width gauge, the absolute value |CL| of the deviation of the 1m length of the head from the 0 line is taken;

[0012] S301: When both ultra-width and camber occur at the same time, the PLC adds the sum of the above ΔX and ΔY to the set position of the short-stroke opening compensation value of the side guide plate for automatic adjustment at the preset position;

[0013] S302: When the camber is shown in the width measurement of laminar cooling, the PLC needs to judge |CL|, and assign the judgment result to the setting position of the short stroke opening compensation value of the side guide plate for automatic adjustment of the preset position.

[0014] S4: Program trigger logic: The first short stroke is triggered when the load of the coiling pinch roll is established, and the second short stroke is triggered when the mandrel load is established. It is required that the first short stroke does not act, and the short stroke opening compensation value is continuously maintained until the coiling roll opens and directly triggers the second short stroke.

[0015] S401: A condition judgment needs to be made before the second short stroke is triggered, and the result is used as the control target for the opening of the side guard after the second short stroke is triggered.

[0016] S402: All the entrance guides in front of the standby coiler execute the short stroke action according to the above logic, and return to the waiting position after the coiling load.

[0017] Further, the operation formula of ΔX in S1 is W avg -W 目标 =ΔX, and the operation formula of ΔY in S2 is CL max -CL min =|ΔY|, where W avg is the average width of the strip head at the L distance, W 目标 is the target width value of the strip head at the L distance, CL max is the maximum value of the center line deviation of the strip head at the L distance, CL min is the minimum value of the center line deviation of the strip head at the L distance.

[0018] Further, the specific trigger logic in S301 is 60mm < ΔX + ΔY ≤ 80mm, assign ADD: 200mm; and 80mm < ΔX + ΔY, assign ADD: 400mm. The specific trigger logic in S302 is 50mm < |CL| ≤ 80mm, assign ADD: 150mm; and 80mm < |CL|, assign ADD: 300mm.

[0019] Further, for the two trigger logics, if "ΔX + ΔY" has been triggered, the camber detection control logic of laminar cooling does not need to be triggered. If "ΔX + ΔY" has not been triggered, it is necessary to judge in time according to the camber |CL| shown in the width measurement of laminar cooling, and then correct the preset position of the short stroke opening compensation value of the side guide plate. The two controls are not accumulated.

[0020] Further, the condition judgment involved in S401 requires that the original program logic side guard target be changed from "hot width value of strip at the finish rolling exit + additional value issued by L2" to "target hot width value of strip + ΔX + value issued by L2", so as to enable the side guard to adjust the control effect according to the actual width of the strip.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This coiling side guard early warning control method measures, calculates and adjusts the strip width overrun and the strip camber value, gives the deviation value according to the empirical formula, and then makes a detection control logic judgment based on the sum of the deviation values to realize the short-stroke trigger of the side guard. After all the entrance side guards perform the short-stroke action according to the logic and the coiling load is restored to the waiting position, the strip head with camber and width overrun can smoothly enter the coiling mandrel of the coiling machine through the coiling side guard area, eliminating the accidents of impact folding and blocking the side guard and piling up steel. In terms of the expected economic benefits, it reduces the productivity of blocked scrap steel, reduces the production cost and improves the economic benefits. In terms of social benefits, it reduces the frequency of processing scrap steel, reduces the risk of abnormal operation of personnel, and also reduces the labor intensity. Description of the Drawings

[0023] Figure 1 Schematic diagram of the strip head camber hitting the coiling side guard of the present invention;

[0024] Figure 2 Schematic diagram of the strip head width overrun being blocked in the middle of the coiling side guard of the present invention;

[0025] Figure 3 Schematic diagram of the deviation value ΔX calculation of the present invention;

[0026] Figure 4 Schematic diagram of the width overrun preset position adjustment of the present invention;

[0027] Figure 5 Schematic diagram of the deviation value ΔY calculation of the present invention;

[0028] Figure 6 Schematic diagram of the camber preset position adjustment of the present invention;

[0029] Figure 7 Schematic diagram of the width overrun and camber preset position adjustment of the present invention;

[0030] Figure 8 Flow chart of the coiling side guard early warning control method of the present invention.

[0031] Figure 9 Process curve diagram of the material number H20180232L in the first embodiment of the present invention;

[0032] Figure 10It is the process curve diagram of material number H20180233L in the second embodiment of the present invention.

[0033] In the figure: 1. Strip steel; 2. Guide guard. Specific implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Refer to Figures 3 - 8 , a coiling side guide guard early warning control method, including the following steps:

[0037] S1: Ultra-wide adjustment: Before the leading end reaches ROT4 (the 4th group of laminar raceways), the PLC collects the data of the width gauge at the exit of the existing FM (finishing mill) and sends it to the instrument PC in real time. The instrument PC processes the data and gives the PLC a deviation value ΔX, which is added to the position of the newly added side guide plate Front close (short stroke opening compensation value) for automatic adjustment of the preset position;

[0038] S2: Camber adjustment: Before the leading end reaches ROT4 (the 4th group of laminar raceways), the PLC collects the data of the multi-functional instrument at the exit of the existing FM (finishing mill) and sends it to the instrument PC in real time. The instrument PC processes the data and gives the PLC a deviation value ΔY, which is added to the position of the newly added side guide plate Front close (short stroke opening compensation value) for automatic adjustment of the preset position;

[0039] S3: Ultra-wide and camber adjustment: The measurement data is determined to be 30 meters according to the actual on-site experience. After the head reaches the laminar width gauge, the absolute value |CL| of the deviation amount of the 1m length of the head from the 0 line is taken;

[0040] S301: When both ultra-wide and camber occur simultaneously, the PLC adds the sum of the above ΔX and ΔY to the set position of the side guide plate Frontclose (short stroke opening compensation value) for automatic adjustment of the preset position;

[0041] S302: When the laminar cooling width gauge shows camber, the PLC needs to judge |CL|, and assign the judgment result to the set position of the side guide plate Front close (short stroke opening compensation value) for automatic adjustment of the preset position;

[0042] S4: Program Trigger Logic: The first short stroke is triggered at PR LOAD ON (coiling pinch roll load establishment), and the second short stroke is triggered at MD LOAD ON (mandrel load establishment). It is required that the first short stroke does not act, and Frontclose (short stroke opening compensation value) is continuously maintained until WR OPEN (coil car open) directly triggers the second short stroke;

[0043] S401: A condition judgment needs to be made before the second short stroke is triggered, and this result is used as the side guide opening control target after the second short stroke is triggered;

[0044] S402: All inlet guides in front of the standby coiler perform short stroke actions according to the above logic, and return to the waiting position after the coiling load.

[0045] Refer to Figure 9 , Material No.: H20180232L.

[0046] According to the shown process curve graph, the set output value of the strip head side guide is obtained:

[0047] 2021-12-17 19:49:34.289, Act = 1499, CenterAct = 23, Settings = 1478

[0048] 2021-12-17 19:49:34.351, Act = 1499, CenterAct = 23, Settings = 1478

[0049] 2021-12-17 19:49:34.414, Act = 1495, CenterAct = 31, Settings = 1478

[0050] 2021-12-17 19:49:34.476, Act = 1495, CenterAct = 31, Settings = 1478

[0051] 2021-12-17 19:49:34.539, Act = 1492, CenterAct = 34, Settings = 1478

[0052] 2021-12-17 19:49:34.601, Act = 1492, CenterAct = 34, Settings = 1478

[0053] 2021-12-17 19:49:34.664, Act = 1490, CenterAct = 35, Settings = 1478

[0054] 2021-12-17 19:49:34.726, Act = 1490, CenterAct = 31, Settings = 1478

[0055] 2021-12-17 19:49:34.789, Act = 1490, CenterAct = 31, Settings = 1478

[0056] 2021-12-17 19:49:34.852, Act = 1489, CenterAct = 31, Settings = 1478

[0057] 2021-12-17 19:49:34.914, Act = 1489, CenterAct = 31, Settings = 1478

[0058] 2021-12-17 19:49:34.977, Act = 1489, CenterAct = 33, Settings = 1478

[0059] 2021-12-17 19:49:35.039, Act = 1488, CenterAct = 28, Settings = 1478

[0060] 2021-12-17 19:49:35.102, Act = 1488, CenterAct = 28, Settings = 1478

[0061] 2021-12-17 19:49:35.164, Act = 1488, CenterAct = 24, Settings = 1478

[0062] 2021-12-17 19:49:35.227, Act = 1488, CenterAct = 24, Settings = 1478

[0063] 2021-12-17 19:49:35.289, Act = 1486, CenterAct = 26, Settings = 1478

[0064] 2021-12-17 19:49:35.352, Act = 1486, CenterAct = 26, Settings = 1478

[0065] 2021-12-17 19:49:35.414, Act = 1485, CenterAct = 35, Settings = 1478

[0066] December 17, 2021 19:49:35.477, Act = 1485, CenterAct = 35, Settings = 1478

[0067] December 17, 2021 19:49:35.539, Act = 1485, CenterAct = 37, Settings = 1478

[0068] December 17, 2021 19:49:35.602, Act = 1486, CenterAct = 29, Settings = 1478

[0069] December 17, 2021 19:49:35.664, Act = 1486, CenterAct = 29, Settings = 1478

[0070] December 17, 2021 19:49:35.727, Act = 1486, CenterAct = 25, Settings = 1478

[0071] December 17, 2021 19:49:35.789, Act = 1486, CenterAct = 25, Settings = 1478

[0072] December 17, 2021 19:49:35.852, Act = 1486, CenterAct = 28, Settings = 1478

[0073] December 17, 2021 19:49:35.914, Act = 1486, CenterAct = 28, Settings = 1478

[0074] December 17, 2021 19:49:35.977, Act = 1486, CenterAct = 32, Settings = 1478

[0075] December 17, 2021 19:49:36.039, Act = 1486, CenterAct = 31, Settings = 1478

[0076] December 17, 2021 19:49:36.102, Act = 1486, CenterAct = 31, Settings = 1478

[0077] December 17, 2021 19:49:36.164, Act = 1485, CenterAct = 26, Settings = 1478

[0078] December 17, 2021 19:49:36.227, Act = 1485, CenterAct = 26, Settings = 1478

[0079] December 17, 2021 19:49:36.289, Act = 1485, CenterAct = 24, Settings = 1478

[0080] December 17, 2021 19:49:36.352, Act = 1485, CenterAct = 24, Settings = 1478

[0081] December 17, 2021 19:49:36.414, Act = 1485, CenterAct = 34, Settings = 1478

[0082] December 17, 2021 19:49:36.477, Act = 1485, CenterAct = 34, Settings = 1478

[0083] December 17, 2021 19:49:36.539, Act = 1485, CenterAct = 34, Settings = 1478

[0084] December 17, 2021 19:49:36.602, Act = 1486, CenterAct = 31, Settings = 1478

[0085] December 17, 2021 19:49:36.664, Act = 1486, CenterAct = 31, Settings = 1478

[0086] December 17, 2021 19:49:36.727, Act = 1486, CenterAct = 32, Settings = 1478

[0087] December 17, 2021 19:49:36.789, Act = 1486, CenterAct = 32, Settings = 1478

[0088] December 17, 2021 19:49:36.852, Act = 1485, CenterAct = 34, Settings = 1478

[0089] 2021-12-17 19:49:36.914, Act = 1485, CenterAct = 38, Settings = 1478

[0090] 2021-12-17 19:49:36.977, Act = 1485, CenterAct = 38, Settings = 1478

[0091] 2021-12-17 19:49:37.039, Act = 1485, CenterAct = 37, Settings = 1478

[0092] 2021-12-17 19:49:37.102, Act = 1485, CenterAct = 37, Settings = 1478

[0093] 2021-12-17 19:49:37.164, Act = 1486, CenterAct = 31, Settings = 1478

[0094] 2021-12-17 19:49:37.227, Act = 1486, CenterAct = 31, Settings = 1478

[0095] Program calculation result:

[0096] 2021-12-17

[0097] 19:49:37.274, CActMin = 22, CActMax = 40, X = 2, Y = 18, X + Y = 47, Z = 0

[0098] From the above program calculation result, the implementation effect of this embodiment is:

[0099] The program output value is 0, X = 29, Y = 18, X + Y = 47 < 60, the program execution is correct, and the head of the coiled strip is successfully coiled normally.

[0100] Embodiment 2

[0101] Refer to Figures 3 - 8 , a coiling side guard warning control method, including the following steps:

[0102] S1: Ultra-wide adjustment: Before the leading end reaches ROT4 (the 4th group of the laminar raceway), the PLC collects the data of the width gauge at the exit of the existing FM (finishing mill) and sends it to the instrument PC in real time. The instrument PC processes the data through calculation and gives the PLC a deviation value ΔX, which is added to the position of the newly added side guide Front close (short-stroke opening compensation value) for automatic adjustment of the preset position.

[0103] S2: Camber adjustment: Before the leading end reaches ROT4 (the 4th group of the laminar raceway), the PLC collects the data of the multi-functional instrument at the exit of the existing FM (finishing mill) and sends it to the instrument PC in real time. The instrument PC processes the data through calculation and gives the PLC a deviation value ΔY, which is added to the position of the newly added side guide Front close (short-stroke opening compensation value) for automatic adjustment of the preset position.

[0104] S3: Ultra-wide and camber adjustment: According to the actual on-site experience, the measurement data is taken as 30 meters. After the head reaches the laminar width gauge, the absolute value |CL| of the deviation amount of the 1m length of the head with the 0 line as the reference is taken.

[0105] S301: When both ultra-wide and camber occur simultaneously, the PLC adds the sum of the above-mentioned ΔX and ΔY to the set position of the side guide Frontclose (short-stroke opening compensation value) for automatic adjustment of the preset position.

[0106] S302: When the camber is shown in the laminar cooling width measurement, the PLC needs to judge |CL|, and the judgment result is assigned and added to the set position of the side guide Front close (short-stroke opening compensation value) for automatic adjustment of the preset position.

[0107] S4: Program trigger logic: The first short-stroke trigger is at PR LOAD ON (coiling pinch roll load establishment), and the second short-stroke trigger is at MD LOAD ON (mandrel load establishment). It is required that the first short-stroke does not act, and the Frontclose (short-stroke opening compensation value) is continuously maintained until WR OPEN (coiler roll opening) directly triggers the second short-stroke.

[0108] S401: A condition judgment needs to be carried out before the second short-stroke trigger, and this result is used as the control target for the side guide opening degree after the second short-stroke trigger.

[0109] S402: All the entrance guides in front of the standby coiler execute the short-stroke action according to the above logic, and return to the waiting position after the coiling load.

[0110] Refer to Figure 10 , material number: H20180233L.

[0111] According to the shown process curve graph, obtain the setting output value of the side guard at the strip head:

[0112] 2021-12-17 19:51:13.366, Act = 1519, CenterAct = -71, Settings = 1686

[0113] 2021-12-17 19:51:13.429, Act = 1515, CenterAct = -60, Settings = 1686

[0114] 2021-12-17 19:51:13.491, Act = 1515, CenterAct = -60, Settings = 1686

[0115] 2021-12-17 19:51:13.554, Act = 1512, CenterAct = -45, Settings = 1686

[0116] 2021-12-17 19:51:13.616, Act = 1512, CenterAct = -45, Settings = 1686

[0117] 2021-12-17 19:51:13.679, Act = 1504, CenterAct = -28, Settings = 1686

[0118] 2021-12-17 19:51:13.741, Act = 1504, CenterAct = -28, Settings = 1686

[0119] 2021-12-17 19:51:13.804, Act = 1501, CenterAct = -7, Settings = 1686

[0120] 2021-12-17 19:51:13.866, Act = 1501, CenterAct = -7, Settings = 1686

[0121] 2021-12-17 19:51:13.929, Act = 1502, CenterAct = 9, Settings = 1686

[0122] 2021-12-17 19:51:13.991, Act = 1502, CenterAct = 9, Settings = 1686

[0123] 2021-12-17 19:51:14.054, Act = 1501, CenterAct = 20, Settings = 1686

[0124] 2021-12-17 19:51:14.116, Act = 1500, CenterAct = 17, Settings = 1686

[0125] 2021-12-17 19:51:14.179, Act = 1500, CenterAct = 17, Settings = 1686

[0126] 2021-12-17 19:51:14.241, Act = 1498, CenterAct = 19, Settings = 1686

[0127] 2021-12-17 19:51:14.304, Act = 1498, CenterAct = 19, Settings = 1686

[0128] 2021-12-17 19:51:14.366, Act = 1497, CenterAct = 25, Settings = 1686

[0129] 2021-12-17 19:51:14.429, Act = 1497, CenterAct = 25, Settings = 1686

[0130] 2021-12-17 19:51:14.491, Act = 1495, CenterAct = 30, Settings = 1686

[0131] 2021-12-17 19:51:14.554, Act = 1495, CenterAct = 31, Settings = 1686

[0132] 2021-12-17 19:51:14.616, Act = 1495, CenterAct = 31, Settings = 1686

[0133] 2021-12-17 19:51:14.679, Act = 1496, CenterAct = 26, Settings = 1686

[0134] 2021-12-17 19:51:14.741, Act = 1496, CenterAct = 26, Settings = 1686

[0135] 2021-12-17 19:51:14.804, Act = 1496, CenterAct = 30, Settings = 1686

[0136] 2021-12-17 19:51:14.866, Act = 1496, CenterAct = 30, Settings = 1686

[0137] 2021-12-17 19:51:14.929, Act = 1495, CenterAct = 25, Settings = 1686

[0138] 2021-12-17 19:51:14.991, Act = 1495, CenterAct = 21, Settings = 1686

[0139] 2021-12-17 19:51:15.054, Act = 1495, CenterAct = 21, Settings = 1686

[0140] 2021-12-17 19:51:15.116, Act = 1495, CenterAct = 17, Settings = 1686

[0141] 2021-12-17 19:51:15.179, Act = 1495, CenterAct = 17, Settings = 1686

[0142] 2021-12-17 19:51:15.241, Act = 1495, CenterAct = 21, Settings = 1686

[0143] 2021-12-17 19:51:15.304, Act = 1495, CenterAct = 21, Settings = 1686

[0144] 2021-12-17 19:51:15.366, Act = 1495, CenterAct = 22, Settings = 1686

[0145] 2021-12-17 19:51:15.429, Act = 1496, CenterAct = 23, Settings = 1686

[0146] 2021-12-17 19:51:15.491, Act = 1496, CenterAct = 23, Settings = 1686

[0147] 2021-12-17 19:51:15.554, Act = 1496, CenterAct = 20, Settings = 1686

[0148] 2021-12-17 19:51:15.616, Act = 1496, CenterAct = 20, Settings = 1686

[0149] 2021-12-17 19:51:15.679, Act = 1496, CenterAct = 28, Settings = 1686

[0150] 2021-12-17 19:51:15.741, Act = 1496, CenterAct = 28, Settings = 1686

[0151] 2021-12-17 19:51:15.804, Act = 1496, CenterAct = 27, Settings = 1686

[0152] 2021-12-17 19:51:15.867, Act = 1496, CenterAct = 25, Settings = 1686

[0153] 2021-12-17 19:51:15.929, Act = 1496, CenterAct = 25, Settings = 1686

[0154] Program calculation result:

[0155] 2020-12-17

[0156] 19:51:16.382, CActMin = -71, CActMax = 31, X = 19, Y = 102, X + Y = 121, Z = 400

[0157] From the above program calculation result, the implementation effect of this embodiment is:

[0158] The program output value is 400, X = 19, Y = 102, X + Y = 121, Z = 400 > 80, the program execution is correct, each side of the coiling guard is opened 200 mm, and the head of the coiled strip is successfully coiled normally.

[0159] In summary, for the coiling side guard warning control method, by measuring, calculating, and adjusting the values of strip width overrun and strip camber, a deviation value is given according to the empirical formula, and then the detection control logic is judged based on the sum of the deviation values to achieve the short-stroke trigger of the side guard. After all the entrance side guards perform the short-stroke action according to the logic and the coiling load is applied, they return to the waiting position. This enables the strip head with camber and width overrun to smoothly enter the coiling mandrel through the coiling side guard area, eliminating accidents such as impact folding and blocking of the side guard and steel piling up. In terms of expected economic benefits, it reduces the productivity of blocked scrap steel, lowers production costs, and improves economic benefits. In terms of social benefits, it reduces the frequency of scrap steel handling, reduces the risk of abnormal operation of personnel, and also reduces the labor intensity.

[0160] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A coiling side guard warning control method, characterized in that: Its warning control method includes the following steps: S1: Ultra-wide adjustment: Before the leading end reaches the 4th group of the laminar raceway, the PLC collects the data of the width gauge at the exit of the existing finishing mill and sends it to the instrument PC in real time. The instrument PC processes the data through calculation and gives a deviation value ΔX to the PLC, which is added to the position of the short-stroke opening compensation value of the newly added side guide plate for automatic adjustment of the preset position; S2: Camber adjustment: Before the leading end reaches the 4th group of the laminar raceway, the PLC collects the data of the multi-functional instrument at the exit of the existing finishing mill and sends it to the instrument PC in real time. The instrument PC processes the data through calculation and gives a deviation value ΔY to the PLC, which is added to the position of the short-stroke opening compensation value of the newly added side guide plate for automatic adjustment of the preset position; S3: Ultra-wide and camber adjustment: The measured data is set to 30 meters according to actual on-site experience. After the head reaches the laminar width gauge, the absolute value |CL| of the deviation amount of the 1m length of the head is taken with the 0 line as the reference; S301: When both ultra-wide and camber occur simultaneously, the PLC adds the sum of the above ΔX and ΔY to the set position of the short-stroke opening compensation value of the side guide plate for automatic adjustment of the preset position; S302: When the camber is shown in the laminar cooling width measurement, the PLC needs to judge |CL|, and the judgment result is assigned and added to the set position of the short-stroke opening compensation value of the side guide plate for automatic adjustment of the preset position; S4: Program trigger logic: The first short-stroke trigger is when the load of the coiling pinch roll is established, and the second short-stroke trigger is when the mandrel load is established. It is required that the first short-stroke does not act, and the short-stroke opening compensation value is continuously maintained until the coiling roll is opened to directly trigger the second short-stroke; S401: A condition judgment needs to be made before the second short-stroke trigger, and this result is used as the side guard opening control target after the second short-stroke trigger; S402: All the entrance guards in front of the standby coiler execute the short-stroke action according to the above logic, and return to the waiting position after the coiling load.

2. A coiling side guard warning control method as described in claim 1, characterized in that: The operation formula for ΔX in S1 is W avg -W 目标 = ΔX. The operation formula for ΔY in S2 is CL max -CL min = ΔY, where W avg is the average width value of the L distance at the strip head, and W 目标 is the target width value of the L distance at the strip head. CL max is the maximum centerline deviation value of the L distance at the strip head, and CL min is the minimum centerline deviation value of the L distance at the strip head.

3. A coiling side guard warning control method as described in claim 1, characterized in that: The specific trigger logic in S301 is 60mm < ΔX + ΔY ≤ 80mm, and the assignment ADD: 200mm; 80mm < ΔX + ΔY, and the assignment ADD: 400mm. The specific trigger logic in S302 is 50mm < |CL| ≤ 80mm, and the assignment ADD: 150mm; 80mm < |CL|, and the assignment ADD: 300mm.

4. A coiling side guard warning control method as described in claim 3, characterized in that: For the two trigger logics, if "ΔX + ΔY" has been triggered, the camber detection control logic of the laminar cooling does not need to be triggered. If "ΔX + ΔY" has not been triggered, it is necessary to judge in time according to the camber |CL| shown in the laminar cooling width measurement, and then correct the preset position of the short-stroke opening compensation value of the side guide plate. The two controls are not accumulated.

5. A coiling side guard warning control method as described in claim 1, It is characterized in that: The condition judgment involved in S401 requires that the original program logic side guard target be changed from "hot width value of the strip at the finish rolling exit + additional value issued by L2" to "hot width value of the strip at the finish rolling exit + ΔX + additional value issued by L2", so as to adjust the control effect of the side guard according to the actual width of the strip.

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