A method of composite pickling of titanium-carbon steel composite strip coils

Abstract

The present application relates to the technical field of metal composite strip surface treatment, and particularly relates to a composite pickling method of titanium-carbon steel composite strip coil. The method comprises the following steps: obtaining a surface treatment strip coil based on a coiling judgment record; performing first-stage pickling and collecting record processing, then performing second-stage entry judgment processing to obtain a second-stage entry strip coil; performing second-mixed acid and ultrasonic processing, then collecting free acid concentration, metal ion concentration and working liquid level, and performing mixed acid and desalted water supplement and small cycle and large cycle switching to obtain a second-stage processing strip coil; and obtaining a coiling judgment record. The present application realizes differentiated transition control of different areas of the strip coil, and combines linkage adjustment of second-stage tank liquid state and strip coil position to improve the uniformity of composite strip coil pickling and surface quality, while reducing pickling liquid consumption, and has beneficial effects of strong process adaptability and high control precision.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology for metal composite strips, and in particular to a composite pickling method for titanium-carbon steel composite strip coils. Background Technology

[0002] In the field of surface treatment technology for metal composite strips, existing solutions for titanium-carbon steel composite strip coils typically operate continuously along the path of uncoiling, mechanical descaling, shot blasting, pickling, rinsing with clean water, hot air drying, and rewinding. These solutions suffer from limitations such as unclear connection between the first and second stages, insufficient coordination between the mixed acid state and the coil feed speed, and inconsistent treatment of the strip head, tail, middle, edge, and local defect locations.

[0003] Existing methods often rely on continuous feeding in a two-stage pickling tank, or on fixed acid concentration ratios, pickling temperatures, and coil feeding speeds to complete the entire roll processing. In the scenario of continuous pickling of titanium-carbon steel composite strip coils, imbalances in the timing of the second stage entry and delays in the replenishment of mixed acid and demineralized water are prone to occur. It is difficult to meet the stable implementation of the second stage entry determination, mixed acid replenishment, and switching between small and large cycles in the composite pickling method of titanium-carbon steel composite strip coils.

[0004] For the combined processing of the first-stage acquisition and ultrasonic pickling of the strip, existing technologies generally treat the mixed acid state, metal ion concentration, pickling temperature, working liquid level, and roll feed speed as decentralized control objects. They lack continuous linkage processing around the second-stage entry judgment, free acid concentration acquisition, metal ion concentration acquisition, working liquid level acquisition, mixed acid and demineralized water replenishment, and small and large cycle switching. It is difficult to form a consistent process of acquisition, judgment, replenishment, switching, and roll-up judgment recording in the continuous operation pickling application scenario of titanium-carbon steel composite strip. This leads to inconsistencies in the operating status of the strip before and after the roll, discontinuous processing links for edge and local defect locations, and difficulty in continuously recalling the roll-up judgment records after cleaning water rinsing and hot air drying with the previous pickling status. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a composite pickling method for titanium-carbon steel composite strip coils, comprising:

[0006] S100. Based on the winding determination record, a surface-treated tape roll is obtained; the winding determination record includes whether the roll directly enters the unwinding process, whether it belongs to the repeated steps and returns to the tape roll, and the winding status of the tape head and tape tail in the previous cycle.

[0007] S200. Based on the surface-treated tape roll, the first stage of pickling and the first stage of data acquisition and recording are performed. Then, based on the first stage data acquisition and recording, the second stage of entry determination processing is performed to obtain the second stage entry tape roll.

[0008] S300, based on the second stage of entering the tape roll, performs the second mixed acid and ultrasonic treatment, then collects the free acid concentration, metal ion concentration, working liquid level, and adds mixed acid and demineralized water, and switches between small circulation and large circulation treatment to obtain the second stage treated tape roll;

[0009] S400: Based on the second-stage processing of the tape roll, a roll-up determination record is obtained.

[0010] Furthermore, the process of obtaining the surface-treated tape roll includes:

[0011] The process of obtaining the surface-treated strip includes: unwinding, shearing, centering, mechanical descaling, shot blasting, grinding and edge trimming.

[0012] The unwinding process includes: releasing the tape roll according to the winding determination record;

[0013] The shearing and leveling process includes: shearing and leveling the belt head and tail using an inlet shear;

[0014] The centering process includes: adjusting the sheared and aligned strip roll to the center position of the pickling production line;

[0015] The mechanical descaling and shot blasting process includes: using a scale breaking machine to break and loosen the oxide scale on the surface of the strip coil, and then using a shot blasting machine to continuously impact the surface of the strip coil.

[0016] The grinding process includes: local removal of local defects that remain after mechanical descaling and shot blasting. The local defects include areas with concentrated residual oxide scale, sheared joints at the head of the belt, the end of the belt tail, and surface abnormalities near uneven edges.

[0017] The edge trimming process includes: after grinding, the edge is continuously trimmed by a disc shear, and the uneven part of the trimmed edge enters the guide groove and is rolled into the edge wire roll.

[0018] Furthermore, the first-stage pickling process includes:

[0019] The surface-treated strip is continuously fed into the first-stage pickling tank and continuously processed in the order of the strip head, middle section, strip tail, edge, and corresponding areas of local defects.

[0020] Furthermore, the first phase of data collection and processing includes:

[0021] Data collection points were set up at the inlet, middle and outlet sections of the first-stage pickling tank to continuously collect data on the mixed acid state, metal ion concentration, pickling temperature and working liquid level.

[0022] The positions of the beginning, end, middle, edge, and local defects are then correlated with the current roll feed speed to form the first stage of data collection records.

[0023] Furthermore, the second phase of the judgment and processing includes:

[0024] Read the mixed acid state, metal ion concentration, pickling temperature, working liquid level, and roll material feed speed from the first stage acquisition record;

[0025] Then read the head position, tail position, middle position, edge position and local defect position, and establish the corresponding relationship according to the order of the strip roll exiting the pickling tank in the first stage;

[0026] If the strip head has left the first-stage pickling tank and the working liquid level of the corresponding outlet section is stable, then the strip section where the strip head is located is recorded as an accessible section.

[0027] If the mixed acid state and metal ion concentration corresponding to the intermediate section are still within the current allowable operating range, then the intermediate section will be continuously recorded as an enterable segment.

[0028] If the edge or local defect is still located in the middle or later section of the first-stage pickling tank, the corresponding area will remain in the first-stage pickling path and will not be merged into the accessible section.

[0029] If the belt tail has not yet reached the exit section, the corresponding belt roll segment will remain in the first-stage pickling tank.

[0030] Once the first accessible section is formed, the pinch rollers send an entry signal to the inlet section of the second-stage pickling tank. The pickling unit reads the entry signal synchronously and accepts the accessible section according to the current working state of the second-stage pickling tank.

[0031] This forms the second stage of the roll entering the belt, arranged along the continuous running direction.

[0032] Furthermore, the second mixed acid and ultrasonic treatment process includes:

[0033] The second mixed acid treatment includes: continuously feeding the second stage roll into the second stage pickling tank, performing continuous operation processing in the order of the roll head, middle part, roll tail, edge and local defect corresponding areas, and calling the second acid concentration ratio, the second pickling temperature and the second roll feed speed.

[0034] The ultrasonic treatment includes: arranging an ultrasonic device in or on the side of the second-stage pickling tank, prioritizing ultrasonic treatment for areas corresponding to the beginning, end, edge, and local defects of the belt, and adjusting the start time of ultrasonic treatment in sync with the belt roll area sequence and running speed.

[0035] Furthermore, the process of collecting and processing free acid concentration, metal ion concentration, and working liquid level includes:

[0036] In the second stage, sampling points are set at the inlet, middle and outlet sections of the pickling tank to continuously collect data on free acid concentration, metal ion concentration and working liquid level, and the collected results are correlated with the current operating position of the ultrasonic pickling tape roll.

[0037] Furthermore, the process of replenishing mixed acid and demineralized water includes:

[0038] When the free acid concentration drops below the corresponding value in the current tank section's operating record, add mixed acid to the second-stage pickling tank;

[0039] When the working liquid level drops, add demineralized water to the second-stage pickling tank.

[0040] Furthermore, the process of switching between small and large loops includes:

[0041] When the metal ion concentration is higher than the current allowable operating value, the second-stage pickling tank switches to large circulation.

[0042] When the area corresponding to the beginning, end, or local defects is passing through the inlet or outlet section of the second-stage pickling tank, prioritize maintaining a small circulation and switch to a large circulation after the area has left.

[0043] The small circulation is used for continuous reflux of a local section of the second-stage pickling tank, and the large circulation is used for reflux of the entire tank solution in the second-stage pickling tank. Both correspond to the current operating position of the roll.

[0044] Furthermore, the process of obtaining the roll-up determination record includes:

[0045] The process of obtaining the winding judgment record includes: rinsing with clean water, hot air drying, winding judgment and winding processing;

[0046] The cleaning water rinsing process includes: continuously feeding the second-stage processed roll into the cleaning water rinsing section, and continuously rinsing the head, middle, tail, edge, and corresponding areas of local defects by the spray section, and increasing the dwell time or spray density when passing through the corresponding areas of local defects.

[0047] The hot air drying process includes: continuously feeding the clean water-washed belt roll into the drying unit, providing hot air from the hot air inlet, hot air channel and hot air outlet, continuously drying the belt head, middle part, belt tail, edge and corresponding areas of local defects, and the hot air temperature continuously corresponding to the state of the belt roll after clean water washing.

[0048] The winding determination process includes: reading the washing section operation record, hot air drying record, and the current passing status of the head, middle, tail, edge, and local defect corresponding areas; and continuously determining whether the head has entered the drum, whether there are uneven parts on the edge, and whether the local defect corresponding area needs to return to the repeating steps.

[0049] If it is determined that the area corresponding to the local defect still needs to repeat the steps, then mark the segment in the winding judgment record so that the next cycle will repeat the steps after unwinding.

[0050] The winding process includes: when the strip head passes through the winding machine inlet and the aforementioned operation record is normal, the strip head enters the drum and begins winding, the middle part is then continuously wound in, the edge part is wound in synchronously with the middle part, and the strip tail is finally wound in to complete the current roll winding.

[0051] The key innovations of this invention include:

[0052] (1) Based on the first stage pickling tape roll, the first stage acquisition record is formed, and the second stage entry judgment process is performed around the mixed acid state, metal ion concentration, pickling temperature, working liquid level, roll feed speed, tape head position, tape tail position, middle position, edge position and local defect position to form the second stage entry tape roll, and the continuous forward feeding link between the two-section pickling tank is rewritten into a segment link driven by the first stage acquisition record.

[0053] (2) Based on the second stage pickling tape roll, perform the ultrasonic treatment to form the ultrasonic pickling tape roll, and then collect the free acid concentration, metal ion concentration and working liquid level, and link the addition of mixed acid and demineralized water as well as the switching of small circulation and large circulation to form the second stage processing tape roll. Organize the tank liquid operation status in the second stage pickling tank and the operation status of the corresponding areas of the tape head, tape tail, edge and local defect position into the same processing link.

[0054] (3) A continuous operation link is constructed around the titanium-carbon steel composite strip coil, including uncoiling, mechanical descaling, shot blasting, grinding, edge trimming, first-stage pickling, second-stage entry judgment, second-stage pickling, ultrasonic treatment, clean water rinsing, hot air drying, coiling judgment and coiling, and the coiling judgment record is returned to the previous uncoiling process to ensure that the head, tail, middle, edge and local defect positions of the strip maintain a consistent calling relationship between the front and back processes.

[0055] The following are its main beneficial effects:

[0056] (1) Compared with the existing technology where the two-stage pickling tank is continuously fed forward in a fixed sequence, the present invention directly connects the data collected in the first stage to the entry determination process in the second stage. This means that the roll entering the second stage is no longer transferred as a whole roll, but rather segmented around the head, tail, middle, edge, and local defect locations. As a result, a clear connection is formed between the first and second stages, and the running status and local position status of the titanium-carbon steel composite roll in the continuous pickling scenario are consistently organized.

[0057] (2) Compared with the existing technology that uses mixed acid state, metal ion concentration, pickling temperature and working liquid level as decentralized control objects, the present invention uses the ultrasonic pickling tape roll as the input for subsequent processing, and organizes the acquisition of free acid concentration, metal ion concentration and working liquid level, the replenishment of mixed acid and demineralized water, and the switching of small and large circulation into the same processing link. As a result, the tank liquid operation status at the end of the second-stage pickling tank corresponds to the roll operation status, and the handover link between the second-stage processed tape roll and the subsequent cleaning water rinsing treatment remains continuous.

[0058] (3) Compared with the existing technology where uncoiling, pickling, rinsing, hot air drying, and rewinding are carried out independently in segments, this invention establishes a process call relationship around the rewinding determination record, so that a continuous record is formed between the uncoiling and centering of the strip, the surface treatment of the strip, the second stage entry of the strip, and the hot air drying of the strip. Thus, the process switching, strip segment transfer, and rewinding return of the titanium-carbon steel composite strip during continuous operation remain on the same link.

[0059] (4) Compared with the existing technology that relies on a fixed acid concentration ratio, a fixed pickling temperature and a fixed roll feeding speed to complete the whole roll processing, the present invention sorts out the timing of the section transfer after the first stage pickling of the roll by collecting and recording data in the first stage and entering the judgment process in the second stage. Then, by collecting and supplementing data after ultrasonic treatment, the operating state in the second stage pickling tank is continuously adjusted so that the processing relationship between the mixed acid state and the roll feeding speed remains consistent in the preceding and following steps.

[0060] (5) Compared with the existing technology, which lacks a unified link between pickling, rinsing and rewinding for edge positions and local defect positions, the present invention continuously retains the calling relationship between edge positions and local defect positions in the first stage of data collection and recording, the second stage of entering the tape roll, the second stage of processing the tape roll and the rewinding judgment record, so that the cleaning water rinsing treatment, the hot air drying treatment and the rewinding judgment and rewinding treatment run along the same object link. Attached Figure Description

[0061] Figure 1 A schematic flowchart of a composite pickling method for titanium-carbon steel composite strip coils provided in this application embodiment;

[0062] Figure 2 This is a structural block diagram of a composite pickling method for titanium-carbon steel composite strip coils provided in an embodiment of this application. Detailed Implementation

[0063] Example 1: Refer to Figure 1 This is a schematic flowchart of a composite pickling method for titanium-carbon steel composite strip coils provided in an embodiment of the present invention. The process may include at least steps S100-S400:

[0064] S100. Based on the winding judgment record, obtain the surface-treated tape roll;

[0065] S200. Based on the surface-treated tape roll, the first stage of pickling and the first stage of data acquisition and recording are performed. Then, based on the first stage data acquisition and recording, the second stage of entry determination processing is performed to obtain the second stage entry tape roll.

[0066] S300, based on the second stage of entering the tape roll, performs the second mixed acid and ultrasonic treatment, then collects the free acid concentration, metal ion concentration, working liquid level, and adds mixed acid and demineralized water, and switches between small circulation and large circulation treatment to obtain the second stage treated tape roll;

[0067] S400: Based on the second-stage processing of the tape roll, a roll-up determination record is obtained.

[0068] Step S100 includes at least steps S110-S130:

[0069] S110. Obtain the titanium-carbon steel composite strip coil and coiling judgment record, and perform uncoiling, strip head and strip tail shearing and centering treatment to obtain uncoiling and centering strip coil.

[0070] Specifically, the titanium-carbon steel composite strip coil is the strip coil object to be entered into the pickling production line, the winding judgment record is the operation record formed in the winding step of the previous cycle, and the winding judgment record corresponds at least to whether the current coil directly enters the unwinding, whether it belongs to the repeated step of returning the strip coil, and the winding status of the strip head and strip tail in the previous cycle.

[0071] During operation, the titanium-carbon steel composite strip is first loaded into the drum of the uncoiler. The uncoiler releases the strip according to the current roll status given by the winding judgment record. The strip head enters the pinch roller first, and the strip tail is retained on the drum side.

[0072] The belt head is the front part entering the pickling production line, and the belt tail is the rear part leaving the roll. The belt head and tail often have uneven sections in the hot-rolled state. Specifically, the belt head and tail are cut and aligned using an inlet shear. The aligned section provides a continuous boundary for subsequent pinch roll traction and straightening.

[0073] After shearing and leveling, the strip coil continues to pass through pinch rollers and a straightener. The centering process involves adjusting the sheared and leveled strip coil to the middle position of the pickling production line, ensuring that the beginning, middle, and end of the strip maintain the same running path during subsequent mechanical descaling, shot blasting, and edge trimming.

[0074] Specifically, the pinch rollers are responsible for traction of the coil, and the straightener is responsible for straightening the coil. The two work together with the uncoiler to form a continuous operation. When the winding judgment record corresponds to a repeating step, the uncoiler calls the coil returned from the previous cycle and re-enters this step in the same order of unwinding, shearing and centering. When the winding judgment record corresponds to a new coil, the uncoiler calls the next coil to enter this step.

[0075] During operation, the system also monitors online whether the belt head smoothly enters the pinch roller, whether the belt tail detaches from the drum, and whether the centering position is deviated. If the belt head is skewed, the belt tail swings, or the centering is deviated, the pinch roller reduces its operating speed, the straightener readjusts the belt coil position, and the belt is fed back after the coil resumes continuous operation.

[0076] Through the above processing, the unwinding and centering tape is formed, and the unwinding and centering tape is recorded as the output field name "unwinding and centering tape" in the current volume operation record, so that it can be directly input and called by "unwinding and centering tape" in S120. At the same time, the correspondence between the winding judgment record and the current unwinding status is retained in the winding judgment and winding processing in the subsequent S400.

[0077] S120. Based on the uncoiling and centering of the strip roll, mechanical descaling and shot blasting are performed to obtain a mechanically descaled and shot-blasted strip roll.

[0078] Specifically, the uncoiling and centering of the strip roll is continuously fed into the descaling machine and shot blasting machine by S110. The mechanical descaling is to use the descaling machine to continuously break and loosen the surface oxide scale on the surface of the strip roll. The shot blasting treatment is to continuously impact the surface of the strip roll after mechanical descaling by the shot blasting machine to further remove the surface oxide scale that still adheres after mechanical descaling.

[0079] During the mechanical descaling stage, the belt head passes through the descaling machine first, followed by the middle section, and then the belt tail passes through last. The running sequence is consistent with the unwinding sequence in S110. The descaling machine operates continuously according to the belt width and running speed, without changing the front and back sequence of the belt.

[0080] During the shot blasting process, the shot blasting machine continuously processes the head, middle, tail and edge of the strip. The edge is the part adjacent to the cut edge on both sides of the strip roll. The edge is often accompanied by uneven parts and thicker surface oxide scale. Therefore, during shot blasting, it runs in the same direction as the middle part and does not change direction separately.

[0081] Furthermore, the local defects in this step are surface abnormalities that are still visible after mechanical descaling and shot blasting. These local defects are not ground in this step, but are retained until processing in S130 through continuous operation. During operation, the pinch rollers maintain the continuous feeding of the uncoiled and centered strip between the descaling machine and the shot blasting machine. When the strip head enters the shot blasting machine, shot blasting first covers the strip head area. When the middle section passes through, the process becomes stable and continuous. When the strip tail enters the shot blasting machine, the same operating conditions are maintained until the strip tail passes through.

[0082] If insufficient mechanical descaling, discontinuous shot blasting, or uneven edge passage occurs during operation, reduce the running speed of the pinch rollers and extend the running time of that section between the descaling machine and the shot blasting machine. Continue feeding after the surface oxide scale condition returns to a consistent state.

[0083] This step forms the mechanically descaled shot blasting roll, and the mechanically descaled shot blasting roll is written into the roll operation record as the output field name "Mechanically Descaled Shot Blasting Roll" for continued input in S130. At the same time, the continuous passing state of the roll head, middle part, roll tail and edge formed in this step will be called in S130 as the pre-run state of grinding and edge trimming, and will be used as the input basis for the continuous running roll in the first stage pickling and stage determination of S200.

[0084] S130. Based on the mechanically descaled and shot-blasted strip roll, perform grinding and edge trimming to obtain a surface-treated strip roll.

[0085] Specifically, after being output from the shot blasting machine, the mechanically descaled and shot-blasted strip roll continues to enter the positioning worktable and the station where the disc shear is located. The grinding process is a localized removal treatment of local defects that remain after mechanical descaling and shot blasting. These local defects include areas with concentrated residual oxide scale, sheared joints at the strip head, the end of the strip tail, and surface abnormalities near uneven edges.

[0086] During operation, first, according to the continuous arrival sequence of the belt head, middle section, and tail section, grind the local defects at the corresponding positions on the positioning worktable; when the belt head passes through, focus on checking the front end and edge after the belt head is sheared and leveled; when the middle section passes through, focus on checking the local defects that still exist after shot blasting; when the belt tail passes through, focus on checking the end section after the coiled tail is released.

[0087] The edge trimming is performed by a disc shear after grinding. The side clearance and overlap of the disc shear are set according to the degree of edge unevenness. The cut uneven part of the edge enters the guide groove and is rolled into the edge wire roll, so that the edge of the roll entering the pickling tank remains continuous and consistent.

[0088] Furthermore, grinding and edge trimming are performed in the order of grinding first, followed by edge trimming. The former addresses local defects, while the latter addresses uneven edges. Neither process alters the continuous running direction of the coil. When a local defect is located near the edge, the defect is ground first, and then the edge section is sheared off by the disc shear. During operation, if the positioning table observes a large area of ​​local defect, the pinch rollers reduce the coil's running speed, restoring the original speed after grinding is completed. If the edge winding is discontinuous after disc shearing, the guide groove position is adjusted, and the coil is re-feeded to the disc shear for processing.

[0089] Through grinding and edge trimming, the local defects and uneven edges left over from the previous station are processed section by section to form a surface condition that can directly enter the first stage of pickling.

[0090] The surface-treated tape roll is output in this step and recorded as the output field name "Surface-treated Tape Roll", which is directly input into "Surface-treated Tape Roll" in S210. At the same time, the processing results of the tape head, middle part, tape tail, edge and local defects in the surface-treated tape roll will be further referenced by the tape head position, tape tail position, middle part position, edge position and local defect position in the subsequent S220.

[0091] In summary, this step achieves the following technical benefits: Compared to the approach in the comparative document where mechanical descaling and shot blasting are followed directly by pickling, this step incorporates grinding and edge trimming corresponding to local defects and edges during continuous operation. This results in a more concentrated and consistent surface condition of the strip entering the first stage of pickling. Furthermore, this step retains the correspondence between the strip head, tail, middle section, edges, and local defects in subsequent data acquisition and stage determination. This ensures that the subsequent first-stage pickling is not merely a simple mixed acid treatment but has a continuous input basis corresponding to the actual parts of the strip.

[0092] Step S200 includes at least steps S210-S230:

[0093] S210. Obtain the surface-treated strip roll, and perform the first mixed acid, the first acid concentration ratio, the first pickling temperature and the first roll feed speed treatment to obtain the first-stage pickled strip roll.

[0094] Specifically, the surface treatment roll comes from the output field "Surface Treatment Roll" of S130. The roll has already undergone unwinding, centering, mechanical descaling, shot blasting, grinding and trimming. When entering this step, it is continuously fed into the first-stage pickling tank along the pickling production line.

[0095] The first mixed acid is the pickling solution arranged in the first stage pickling tank. The first acid concentration ratio is the ratio of each acid component in the first mixed acid during the current running period. The first pickling temperature is the temperature state of the corresponding current tank section in the first stage pickling tank. The first roll feeding speed is the running speed of the surface treatment roll being pulled through the first stage pickling tank by the pinch roller.

[0096] During operation, the pickling unit first adjusts the working liquid level of the first-stage pickling tank to the state of the strip roll being immersed. Then, the pinch rollers pull the surface-treated strip roll into the first-stage pickling tank according to the current bandwidth and the entry time of the strip head. The strip head enters the first mixed acid area first, the middle part enters continuously afterward, and the strip tail enters last.

[0097] The first stage of pickling does not apply the same dwell time to the entire roll, but instead performs continuous processing according to the sequential arrival order of the head, middle, tail, edge, and local defect areas in the tank.

[0098] The specific processing steps are as follows: first, the belt head passes through the inlet section of the first-stage pickling tank; then, the edge and the corresponding area of ​​local defects stay in the tank for the current set time period; then, the middle section passes through continuously at the first roll feed speed; when the belt tail enters the tank, it still maintains the same running direction, but the inlet section pinch roller is allowed to slow down for a short time so that the belt tail and the middle section of the front section maintain a continuous distance.

[0099] During project implementation, if a titanium-carbon steel composite strip comes from the surface treatment station after hot rolling, the strip head first contacts the first mixed acid at the entrance section of the first-stage pickling tank, the edge and the corresponding area of ​​local defects simultaneously contact the first mixed acid, and the middle part passes through continuously under the traction of the pinch rollers. The entire process does not switch to the second-stage pickling tank.

[0100] At the end of this step, the first stage pickling tape roll is formed, and the product is recorded as the output field "first stage pickling tape roll", which is directly sent to "first stage pickling tape roll" in S220. At the same time, the operation records formed in this step, such as the first mixed acid, the first acid concentration ratio, the first pickling temperature, and the first roll feed speed, are retained for subsequent association and retrieval of the first stage acquisition records.

[0101] S220. Based on the first stage pickling of the strip roll, the mixed acid state, metal ion concentration, pickling temperature, working liquid level, roll feed speed, strip head position, strip tail position, middle position, edge position and local defect position are collected and processed to obtain the first stage collection record.

[0102] Specifically, the first-stage pickling tape roll comes from the output field "first-stage pickling tape roll" of S210, and the tape roll runs continuously in the first-stage pickling tank.

[0103] The mixed acid state in this step refers to the state of the first mixed acid in the tank during the current time period, including at least the mixed acid distribution state in the front, middle and rear sections of the tank; the metal ion concentration refers to the ion concentration state in the first-stage pickling tank after the oxide scale and oxide layer on the surface of the roll enter the tank solution; the pickling temperature and working liquid level correspond to the temperature state and liquid level state of the first-stage pickling tank, respectively; the roll feed speed is given by the current operating state of the pinch rollers; the roll head position, roll tail position, middle position, edge position and local defect position are the current positions of the corresponding areas of the roll in the first-stage pickling tank.

[0104] During data collection, sampling points are first set up at the inlet, middle, and outlet sections of the first-stage pickling tank to continuously collect data on the mixed acid state, metal ion concentration, pickling temperature, and working liquid level. Then, the corresponding roll feed speed is recorded by the operation of the pinch rollers. The entry time of the corresponding head, tail, middle, edge, and local defects is recorded by the sequential operation of the inlet shear, straightener, shot blasting machine, and disc shear. The entry time is then correlated with the current roll feed speed to obtain the position status of each corresponding area in the first-stage pickling tank.

[0105] Furthermore, when the strip head enters the exit section, the acquisition system records the strip head position and the mixed acid state of the corresponding tank section; when the middle section passes through the middle section of the tank, the acquisition system records the middle section position and the metal ion concentration of the corresponding tank section; when the edge and the corresponding area of ​​local defects pass through the same section of the tank, the acquisition system records the correspondence between the edge position, the location of the local defect, and the pickling temperature and working liquid level of that section; when the strip tail enters the later section of the tank, the acquisition system records the correspondence between the strip tail position and the current roll feed speed. If an acquisition interruption occurs, the current tank section state is supplemented by continuous recording from the two preceding and following acquisition points, and the supplementary recording period is marked in the first stage acquisition record.

[0106] Through the above acquisition and processing, the first stage acquisition record is formed. This record is saved as the output field "first stage acquisition record" and is directly used as the input for the "first stage acquisition record" in S230. At the same time, the mixed acid state, metal ion concentration, pickling temperature, working liquid level and status of each position in this record also form a cross-step connection with the subsequent second stage pickling inlet arrangement in S310.

[0107] S230. Based on the data collected in the first stage, perform the second stage entry determination process to obtain the second stage entry tape roll.

[0108] Specifically, the first-stage acquisition record comes from the output field "First-stage acquisition record" of S220. The second-stage judgment process in this step is to continuously judge the current state of the tape roll after the first-stage pickling. The judgment objects include whether the tape head, middle part, tape tail, edge, and the corresponding area of ​​local defects have entered the second-stage pickling tank in the current running order.

[0109] During the determination, first read the mixed acid state, metal ion concentration, pickling temperature, working liquid level and roll feed speed from the first stage collection record, then read the head position, tail position, middle position, edge position and local defect position, and establish the corresponding relationship according to the order of the roll exiting the pickling tank in the first stage.

[0110] If the belt head has left the first-stage pickling tank and the working liquid level at the corresponding outlet section is stable, then the belt section where the belt head is located is recorded as an accessible section. If the mixed acid state and metal ion concentration of the middle section are still within the current allowable operating range, then the middle section is continuously recorded as an accessible section. If the edge or local defect location is still in the middle or rear section of the first-stage pickling tank, then the corresponding area continues to remain in the first-stage pickling path and is not merged into the accessible section. If the belt tail has not yet reached the outlet section, then the belt section corresponding to the belt tail continues to remain in the first-stage pickling tank.

[0111] Furthermore, the second-stage entry determination process also includes continuous triggering conditions. After the current accessible section is formed, the pinch roller sends an entry signal to the inlet section of the second-stage pickling tank. The pickling unit synchronously reads this entry signal and accepts the accessible section according to the current operating state of the second-stage pickling tank. For repeated steps returning the roll, this step is still executed according to the same determination link, only adding a return mark to the first-stage acquisition record.

[0112] During the project implementation, the head of the current roll first reaches the exit section of the first-stage pickling tank, while the area corresponding to the local defects on the edge remains in the middle section of the tank. In this step, the roll section corresponding to the head of the roll first enters the second-stage pickling tank, the middle section then continuously enters, the area corresponding to the local defects on the edge is entered after the current first-stage operation is completed, and the tail of the roll enters last, thus forming the second-stage rolls arranged along the continuous running direction.

[0113] The second stage of entering the roll is recorded as the output field "Second stage entering the roll" and is directly input into the "Second stage entering the roll" of S310. Then, it enters the processing of the second mixed acid, the second acid concentration ratio, the second pickling temperature and the second roll feed speed.

[0114] Summary of the technical effects of this step: This step rewrites the method in the comparison document, which relies solely on continuous feeding into a two-stage pickling tank, into a continuous judgment entry method based on the data collected in the first stage. This allows the head, middle, tail, edge, and corresponding areas with local defects to enter the next stage according to their respective operating states. This treatment creates an explicit connection between the first and second stage pickling processes. The second stage no longer accepts tape roll segments that have not completed the first stage, and the transition sequence of the front and rear sections and the corresponding edge sections of the tape roll is clearer.

[0115] Step S300 includes at least steps S310-S330:

[0116] S310. Obtain the second stage feed roll, and perform second mixed acid, second acid concentration ratio, second pickling temperature and second roll feed speed treatment to obtain the second stage pickled roll.

[0117] Specifically, the second stage of entering the tape roll comes from the output field "second stage entering the tape roll" of S230, which includes the tape head, middle part, tape tail, edge and local defect corresponding areas that have completed the first stage pickling and are allowed to continue forward after the second stage entry judgment process.

[0118] The second mixed acid is arranged in the second-stage pickling tank and is the mixed acid that actually contacts the surface of the strip in this step; the second acid concentration ratio is the current composition ratio of the solution in the second-stage pickling tank, including at least the current ratio of hydrochloric acid, nitric acid and hydrofluoric acid; the second pickling temperature is the temperature of the second-stage pickling tank along the path of the strip; the second roll feed speed is the running speed at which the pinch roller pulls the second-stage strip into the second-stage pickling tank.

[0119] During operation, the second-stage pickling tank first completes the tank liquid switching based on the working liquid level and mixed acid replenishment record of the previous period. Then, the pinch roller continuously feeds the second-stage entry belt into the second-stage pickling tank from the transition section between the outlet of the first-stage pickling tank and the inlet of the second-stage pickling tank.

[0120] The specific processing steps are as follows: First, the belt head enters the inlet section of the second-stage pickling tank, so that the outer surface and edge of the belt head come into contact with the second mixed acid; then the middle section enters continuously, and the area corresponding to the local defects makes contact with the second mixed acid in the same direction when passing through the middle section; the belt tail enters last and maintains a continuous distance from the previous middle section.

[0121] Furthermore, the acid concentration ratio, the second pickling temperature, and the second roll feed speed in the second stage are not fixed, but are continuously adjusted according to the order of the areas entering the roll in the second stage.

[0122] For the leading section, a lower second roll feed speed can be implemented at the entrance section; for the continuous middle section, the normal second roll feed speed can be restored; for the edge and the area corresponding to local defects, the forward feed cycle can be shortened or the dwell time in the groove can be extended without changing the direction of roll operation.

[0123] In the engineering embodiment, a roll of titanium-carbon steel composite strip, after passing through the first stage of the judgment, is fed into the second stage pickling tank by pinch rollers. The strip head enters first, the edges enter simultaneously, and then the middle section passes through continuously. When the area corresponding to a local defect reaches the middle section of the second stage pickling tank, the pickling unit reads the second acid concentration ratio and the second pickling temperature record corresponding to that section, and keeps that section running continuously. After the strip tail is released from the roll, it enters the end section of the second stage pickling tank, and the pinch rollers adjust the second roll feed speed according to the remaining length of the strip tail.

[0124] In case of abnormal operation, if the working liquid level at the inlet section of the second-stage pickling tank is lower than the liquid level required for the current bandwidth, the forward feeding of the roll head will be temporarily suspended and the tank liquid will be replenished; if the second pickling temperature deviates from the current operating range in the later section of the tank, the operating status of that section will be recorded and the feed speed of the second roll in that section will be reduced; if the edge swings in the inlet section, the running position of the roll will be recalibrated by the pinch roller path after centering.

[0125] After processing with the second mixed acid, the second acid concentration ratio, the second pickling temperature, and the second roll feed speed, the second-stage pickling roll is formed, and this roll is recorded as the output field "second-stage pickling roll". It is directly used as the input of "second-stage pickling roll" in S320. At the same time, the second-stage operation record corresponding to this roll continues to be used for subsequent S330 to collect and call free acid concentration, metal ion concentration, and working liquid level.

[0126] S320. Based on the second-stage pickling tape roll, ultrasonic treatment is performed to obtain an ultrasonic pickling tape roll.

[0127] Specifically, the second-stage pickling tape roll comes from the output field "second-stage pickling tape roll" of S310, and it has entered the second-stage pickling tank and is in continuous contact with the second mixed acid.

[0128] The ultrasonic treatment in this step is a continuous treatment performed simultaneously on the tank solution and the surface of the roll by an ultrasonic device arranged in or on the side of the second-stage pickling tank.

[0129] The ultrasonic device is part of the pickling unit, and its structure includes at least an ultrasonic generator, an action part communicating with the second-stage pickling tank, and an opening part connected to the pinch roll operation record. The ultrasonic treatment is preferentially carried out on the head, tail, edge, and areas corresponding to local defects. During operation, the ultrasonic device first reads the second-stage operation record formed in S310, and then starts the ultrasonic treatment according to the second roll feed speed and the roll entry position.

[0130] Specifically, after the belt head enters the inlet section of the second-stage pickling tank, the ultrasonic device is first activated in the corresponding tank liquid area of ​​the inlet section, so that the surface and edge of the belt head and the tank liquid of the inlet section are treated synchronously; when the middle part enters the middle section of the tank, the ultrasonic device is continuously activated or activated in time intervals; when the area corresponding to the local defect reaches the middle section or the rear section of the tank, the ultrasonic device extends the ultrasonic treatment period according to the time that the area has passed; when the belt tail enters the rear section of the tank, the ultrasonic device continues to operate until the belt tail passes through.

[0131] Furthermore, the ultrasonic treatment is not merely an additional action, but a process action corresponding to the regional sequence of the pickling of the belt roll in the second stage. For the edge, the ultrasonic treatment acts on the bath solution area near the edge of the belt roll; for local defects, the ultrasonic treatment acts on the bath solution path through which the corresponding area of ​​the local defect passes; for the belt head and tail, the ultrasonic treatment acts on the inlet and outlet sections. If changes in the passing speed at the edge, the belt head arriving earlier, the belt tail leaving later, or changes in the residence time of the area corresponding to local defects are recorded during operation, the ultrasonic device will synchronously adjust its activation period according to the operation record of the pinch rollers.

[0132] Understandably, in the engineering implementation of a pickling production line, if the second-stage pickling tank is long, ultrasonic devices can be arranged at the inlet, middle, and outlet sections respectively; if the second-stage pickling tank is short, an integrated ultrasonic device can be arranged on the side of the tank, and the action section can be switched according to the sequence of the conveyor belt passing through. In abnormal situations, if the ultrasonic device is not activated when the conveyor belt enters, the second-stage pickling conveyor belt in that section will remain at the inlet section of the second-stage pickling tank and will be fed forward again after the device is reopened; if the area corresponding to a local defect has already entered the outlet section and the ultrasonic treatment time is insufficient, the operating speed can be temporarily reduced by the pinch rollers to make up for the ultrasonic treatment in that section.

[0133] After the above ultrasonic treatment, the ultrasonic pickling tape roll is obtained, and the product is recorded as the output field "ultrasonic pickling tape roll" for direct input of "ultrasonic pickling tape roll" in S330; at the same time, the ultrasonic treatment period, corresponding area and current operating status are retained in the second stage operation record of this roll, and are continuously associated with subsequent mixed acid replenishment, demineralized water replenishment, small circulation and large circulation switching.

[0134] S330. Based on the ultrasonic pickling tape roll, the free acid concentration, metal ion concentration and working liquid level are collected, and mixed acid and demineralized water are added and the small circulation and large circulation processes are switched to obtain the second-stage treated tape roll.

[0135] Specifically, the ultrasonic pickling tape roll comes from the output field "ultrasonic pickling tape roll" of S320, at which time the tape roll is at the end of the continuous operation of the second-stage pickling tank or the subsequent processing section.

[0136] The free acid concentration in this step refers to the current state of the acid solution that can participate in pickling in the second-stage pickling tank. The metal ion concentration refers to the ion concentration state after the tape surface enters the tank solution in the second-stage pickling tank. The working liquid level refers to the current liquid level state of the second-stage pickling tank. The addition of mixed acid and demineralized water refers to the replenishment treatment of the current tank solution in the second-stage pickling tank. The switching between small circulation and large circulation refers to the switching treatment of the circulation path of the second-stage pickling tank.

[0137] The specific processing flow is as follows: First, sampling points are set at the inlet, middle and outlet sections of the second-stage pickling tank to continuously collect data on free acid concentration, metal ion concentration and working liquid level; then, the collected results are correlated with the current running position of the ultrasonic pickling belt to determine whether the current tank liquid needs to be replenished; then, based on the judgment results, mixed acid replenishment and demineralized water replenishment are implemented, and the small circulation and large circulation are switched.

[0138] Furthermore, when the free acid concentration drops below the corresponding value recorded in the current tank section, the acid tank adds mixed acid to the second-stage pickling tank; when the metal ion concentration is higher than the current allowable value, the second-stage pickling tank switches to large circulation to change the path of the tank solution; when the working liquid level drops, demineralized water is added to the second-stage pickling tank; when the area corresponding to the head, tail, or local defects is passing through the inlet or outlet section of the second-stage pickling tank, small circulation can be maintained first, and large circulation can be switched after the area leaves.

[0139] The small circulation is used for continuous reflux of a local section of the second-stage pickling tank, and the large circulation is used for reflux of the entire tank solution in the second-stage pickling tank. Both correspond to the current operating position of the roll.

[0140] In the engineering embodiment, if the pickling unit detects a decrease in free acid concentration at the inlet section of the second-stage pickling tank, it will first add mixed acid; if it detects an increase in metal ion concentration in the middle section of the tank, it will switch to large circulation; if it detects a decrease in working liquid level in the rear section of the tank, it will add demineralized water and maintain the current operation of the rear section of the tank; if the belt tail is still in the tank at this time, the pinch roller will maintain the current roll feed speed, and the normal circulation state will be restored after the belt tail leaves.

[0141] In case of abnormal operation, if the collection point fails for a short time, the collection record of the previous period of the adjacent tank section will be called and the supplementary record mark will be retained; if the working liquid level changes significantly after the addition of mixed acid, the demineralized water will be added first and then the collection will be re-collected; if the switching between small and large circulation is inconsistent with the current roll position, the switching will be re-recorded according to the position of the current roll head, roll tail, middle part, edge and local defect corresponding area.

[0142] After collecting data on free acid concentration, metal ion concentration, and working liquid level, and replenishing mixed acid and demineralized water while switching between small and large circulation processes, the second-stage processing tape roll is obtained. This tape roll is then input into the "Second-Stage Processing Tape Roll" field of S410 as the output field. Simultaneously, the second-stage tank liquid operation record, replenishment record, and circulation switching record generated in this step are used for subsequent cleaning water rinsing, hot air drying, and winding determination.

[0143] In summary, the technical benefits of this step are as follows: Compared to existing technologies where the second-stage pickling relies solely on a fixed mixed acid and a fixed bath solution, this step directly links the position of the conveyor belt after ultrasonication to the free acid concentration, metal ion concentration, working liquid level, and the switching between small and large circulation cycles. This ensures that the second-stage pickling is no longer a continuous flow through a single bath solution. Consequently, the operating status of the belt head, tail, edges, and areas corresponding to local defects during the second-stage treatment is preserved and incorporated into the subsequent cleaning water rinsing and hot air drying process.

[0144] Step S400 includes at least steps S410-S430:

[0145] S410. Obtain the second-stage processing tape roll, perform cleaning water rinsing treatment, and obtain a cleaning water rinsed tape roll.

[0146] Specifically, the second-stage processing tape roll comes from the output field "second-stage processing tape roll" of S330. This tape roll has completed the second-stage pickling, ultrasonic treatment, free acid concentration acquisition, metal ion concentration acquisition, working liquid level acquisition, mixed acid and demineralized water replenishment, and small and large circulation switching processing. When entering this step, it is continuously fed into the clean water rinsing section from the second-stage pickling tank along the pickling production line.

[0147] The cleaning water rinsing is a process of continuously rinsing the head, middle, tail, edge, and areas corresponding to local defects with cleaning water. The cleaning water is supplied by the spray section and the guide section of the cleaning water rinsing section. The spray section is located above and below the running path of the roll, and the guide section is connected to the bottom of the rinsing section to remove residual mixed acid and deposits on the surface of the roll after the second stage of treatment.

[0148] During operation, the belt head is first fed into the inlet of the clean water rinsing section by the pinch rollers, and then the spray section simultaneously rinsing the upper and lower surfaces of the belt head with clean water. After the belt head passes through, the middle section enters the rinsing section in a continuous running sequence, and the edges and middle section are sprayed synchronously. The area corresponding to local defects has an increased dwell time or increased spray density when passing through the spray section. The belt tail finally passes through the clean water rinsing section and leaves the outlet of the rinsing section after rinsing is completed.

[0149] Furthermore, the triggering conditions in this step correspond to the second-stage operation record of the previous step. When the small and large cycles recorded by S330 are switched over and the second-stage processing belt enters the inlet of the rinsing section, the cleaning water rinsing is automatically started; when the belt tail leaves the outlet of the rinsing section, the cleaning water rinsing is automatically ended.

[0150] If discontinuous washing of the roll head is found during operation, the pinch roller will temporarily reduce the roll feed speed and maintain the current spraying state; if there is residual mixed acid at the edge, the edge will pass through the corresponding spraying section again; if the area corresponding to the local defect is not washed enough, the passage time of that section in the clean water washing section will be extended according to the position record of that area in the roll in the second stage of processing.

[0151] During the project implementation, multiple continuous spray sections can be set up between the outlet of the second-stage pickling tank and the inlet of the hot air drying section. The roll first passes through the front section of cleaning water rinsing, and then through the rear section of cleaning water rinsing. The front section carries away the tank liquid, and the rear section completes the rinsing of the roll surface.

[0152] After the above processing, the clean water rinsed tape roll is obtained, and the product is recorded as the output field "clean water rinsed tape roll", which can be directly called by "clean water rinsed tape roll" in S420; at the same time, the rinsing section operation record formed by the clean water rinsed tape roll in this step can also be used for subsequent hot air drying and winding judgment processing.

[0153] S420. Based on the clean water rinsed belt roll, hot air drying treatment is performed to obtain hot air dried belt roll.

[0154] Specifically, the clean water rinsed roll comes from the output field "clean water rinsed roll" of S410, and its surface has been clean water rinsed before it continuously enters the drying unit.

[0155] The hot air drying is a process of continuously drying the surface and edges of the strip roll washed with clean water using hot air provided by the drying unit. The drying unit includes at least a hot air inlet, a hot air channel, and a hot air outlet. The hot air temperature is adjusted during operation according to the roll feed speed, width, and roll thickness.

[0156] During operation, the belt head is first fed into the dryer unit inlet by the pinch rollers. The hot air inlet section starts to supply air when the belt head enters, and the hot air channel simultaneously dries the upper and lower surfaces of the belt head with hot air. Then, the middle section continuously passes through the hot air channel, and the edges receive hot air together with the middle section. When the area corresponding to a local defect enters the hot air channel, the passage time of this section is maintained according to the washing section operation record formed in S410 and the current roll feed speed, so that the area corresponding to the local defect keeps the same running direction as the front and rear middle sections. Finally, the belt tail passes through the hot air channel and leaves the dryer unit outlet.

[0157] Furthermore, the hot air temperature in this step is not a single fixed state, but continuously corresponds to the state of the belt roll after rinsing with cleaning water. When the belt head enters, the hot air inlet section first calls the inlet section hot air temperature; when the middle section is running stably, the hot air channel calls the middle section hot air temperature; when the belt tail passes, the hot air outlet section continues to maintain the current hot air state until the belt tail leaves.

[0158] If there is still local water accumulation when the clean water rinsed belt roll enters the dryer unit, the pinch roller will temporarily reduce the roll feed speed to increase the running time of that section in the hot air channel; if the edge swings in the hot air channel, the pressure roller position will be adjusted according to the running path after centering and the hot air supply will be maintained; if the hot air exhaust is closed in advance when the belt tail passes, the belt tail position record will be called to reopen the hot air until the belt tail leaves.

[0159] During the project implementation, two continuous hot air channels can be set up in the drying unit. The front channel completes the hot air drying of the beginning and middle section of the belt, while the rear channel completes the hot air drying of the edge, the area corresponding to local defects, and the tail of the belt. The two channels work continuously to wash the belt with the same cleaning water.

[0160] After the above hot air drying process, the hot air dried roll is obtained, and the product is recorded as the output field "hot air dried roll", which can be directly called by the "hot air dried roll" of S430. At the same time, the hot air temperature call record, the roll head and roll tail pass record, and the drying record of the corresponding area of ​​edge and local defects formed in this step are also connected with the winding judgment and winding process.

[0161] S430. Based on the hot air drying belt roll, perform winding determination and winding processing to obtain a winding determination record.

[0162] Specifically, the hot air drying belt roll originates from the output field "Hot Air Drying Belt Roll" of S420, having continuously passed through the cleaning water rinsing section and the drying unit before entering the winding machine. The winding determination is a decision on whether the current segment of the hot air drying belt roll should be directly wound or enter a repeating step. The winding process is a continuous process of winding the belt roll that has passed the winding determination onto the winding machine drum.

[0163] During operation, the system first reads the running records of the rinsing section (S410), the hot air drying records (S420), and the current passage status of the belt head, middle section, tail section, edge section, and corresponding areas with local defects. Then, at the winding machine inlet, it continuously determines whether the belt head can enter the drum, whether there are uneven parts on the edge, and whether the corresponding areas with local defects need to be returned to repeat the steps. When the belt head passes through the winding machine inlet and the aforementioned running records are normal, the belt head enters the drum and begins winding; the middle section is then continuously wound into the drum; the edge section enters the drum synchronously with the middle section and maintains winding in the same direction; the belt tail finally enters the drum and completes the current roll winding.

[0164] If the determination finds that the corresponding area of ​​a local defect still needs to repeat the steps, the operation of this roll will not be terminated immediately. Instead, the section corresponding to the local defect will be marked in the winding determination record before passing the winding machine inlet. This will allow the roll to repeat the unwinding steps when the winding determination record is called in the next cycle in S110. If there are uneven parts on the edge, the edge position will be marked in the winding determination record and the roll will continue to be processed according to the grinding and trimming path after unwinding in the next cycle.

[0165] Furthermore, the triggering conditions for this step correspond to the winding state of the roll. When the head of the hot-air dried roll reaches the winding machine inlet, the winding process automatically starts; when the tail of the roll is wound into the roll and the current roll winding is completed, the winding process automatically ends.

[0166] During the project, a roll of titanium-carbon steel composite strip that has completed the second stage of pickling, rinsing with clean water and hot air drying is continuously wound by a winding machine drum. The strip head is first fixed to the drum, and then the middle part is continuously wound in. The corresponding area of ​​local defects is recorded simultaneously during winding. After the strip tail is wound in, it forms the winding end point of the current roll.

[0167] If the strip head deviates from the center of the roll during winding, the pressure roller adjusts the winding path; if the winding tension changes when the strip tail is wound in, the winding machine adjusts the winding speed according to the strip tail winding state; if the steps need to be repeated, the winding machine retains the roll mark after the current roll is finished, without changing the current winding sequence.

[0168] After the above winding determination and winding process, the winding determination record is obtained, and the record is used as the output field "winding determination record" for the next loop S110 to call the "winding determination record", thereby forming a closed-loop link from winding process back to unwinding process.

[0169] Summary of the technical effects of this step: This step rewrites the existing path of directly winding the strip after pickling into a linked path of winding judgment and winding processing after hot air drying. This ensures that the beginning, middle, end, edge, and local defect areas of the strip have corresponding records before winding. This process allows the unwinding process of the next cycle to directly call the winding judgment record formed in this step, making the return link of repeated steps clearer and forming a continuous closed loop for the entire pickling production line.

[0170] Example 2: Figure 2 A structural block diagram of a composite pickling method for titanium-carbon steel composite strip coils according to an embodiment of the present invention is shown. Figure 2 As shown, the structure may include:

[0171] The uncoiling, centering, and surface treatment module 01 is used to acquire the titanium-carbon steel composite strip coil and the coiling judgment record, complete uncoiling, shearing and aligning of the strip head and tail, centering, mechanical descaling, shot blasting, grinding, and edge trimming, and output the surface-treated strip coil. Specifically, the uncoiling, centering, and surface treatment module is connected to the uncoiler, pinch rollers, straightener, inlet shear, descaling machine, shot blasting machine, positioning worktable, disc shear, and coiler. The uncoiling, centering, and surface treatment module first receives the titanium-carbon steel composite strip coil and the coiling judgment record. The coiling judgment record comes from the coiling judgment and coiling module. After the titanium-carbon steel composite strip coil enters the uncoiler, the uncoiling, centering, and surface treatment module retrieves the current coil status from the coiling judgment record, drives the uncoiler to unwind, and drives the inlet shear to shear and align the strip head and tail. The sheared strip coil enters the pinch rollers and straightener, and the uncoiling, centering, and surface treatment module centers the strip coil's running path. After centering, the strip coil enters the descaling machine for mechanical descaling, and then enters the shot blasting machine for shot blasting. After shot blasting, the strip coil enters the positioning worktable, where the uncoiling, centering, and surface treatment module performs grinding on local defect locations and sends the edges to a disc shear for trimming. The uneven edges cut off by the disc shearing are fed into the edge coil. After the above continuous processing, a surface-treated strip coil is formed. The uncoiling, centering, and surface treatment module outputs the surface-treated strip coil to the first-stage pickling and acquisition module, which receives it as the surface-treated strip coil. Simultaneously, it retains the uncoiling, shearing, centering, mechanical descaling, shot blasting, grinding, and trimming states of this coil for use in the next cycle.

[0172] The first-stage pickling and acquisition module 02, connected to the uncoiling, centering, and surface treatment module, receives the surface-treated strip roll, processes the first mixed acid, the first acid concentration ratio, the first pickling temperature, and the first roll feed speed, and acquires data on the mixed acid state, metal ion concentration, pickling temperature, working liquid level, roll feed speed, strip head position, strip tail position, middle position, edge position, and local defect position, outputting the first-stage acquisition record. Specifically, the first-stage pickling and acquisition module is connected to the first-stage pickling tank, acid tank, pinch rollers, working liquid level acquisition unit, temperature acquisition unit, metal ion concentration acquisition unit, and position recording unit. The first-stage pickling and acquisition module receives the surface-treated strip roll output from the uncoiling, centering, and surface treatment module and guides it into the first-stage pickling tank. After entering the tank, the first-stage pickling and acquisition module uses the first mixed acid, maintains the first acid concentration ratio, controls the first pickling temperature, and simultaneously adjusts the first roll feed speed of the pinch rollers. The strip passes through the first-stage pickling tank in a continuous running sequence, including the beginning, middle, end, edge, and locations of local defects. During strip roll operation, the first-stage pickling and acquisition module continuously collects data on the mixed acid state, metal ion concentration, pickling temperature, and working liquid level of the first-stage pickling tank. Simultaneously, it records the roll feed speed, beginning, end, middle, edge, and location of local defects based on the pinch roller's operating status and the current position of the strip roll. The acquisition results are stored internally within the module according to the same roll batch and correlated with the current pickling tank operating status. After completing the first-stage pickling and acquisition, the first-stage pickling and acquisition module generates a first-stage acquisition record. This first-stage acquisition record is output to the second-stage entry judgment module, serving as the first-stage acquisition record received by that module, and is also retained within this module as part of the tank operation record for subsequent retrieval.

[0173] The second-stage entry judgment module 03, connected to the first-stage pickling and acquisition module, receives the acquisition records from the first stage, completes the second-stage entry judgment, and outputs the second-stage entry roll. Specifically, the second-stage entry judgment module receives the first-stage acquisition records sent by the first-stage pickling and acquisition module and reads the mixed acid state, metal ion concentration, pickling temperature, working liquid level, roll feed speed, roll head position, roll tail position, middle section position, edge position, and local defect position. The second-stage entry judgment module performs judgments in the order of the roll head, middle section, roll tail, edge, and local defect position at the exit section of the first-stage pickling tank. When the roll head meets the transition conditions, the second-stage entry judgment module writes the corresponding roll segment into the second-stage entry roll. When the middle section continuously meets the transition conditions, the second-stage entry judgment module writes continuously in the running order. When the edge and local defect positions do not meet the transition conditions, the second-stage entry judgment module retains that segment and continues to run in the first-stage pickling path. After the roll tail reaches the exit section, it is then written into the second-stage entry roll. The second-stage entry judgment module generates a corresponding judgment status for each roll segment and associates the judgment status with the position status in the aforementioned acquisition record. After the judgment is completed, the second-stage entry roll is output. The second-stage entry roll is sent to the second-stage pickling and ultrasonic module as the second-stage entry roll received by this module, and the judgment status is used by the subsequent replenishment and cycle switching modules.

[0174] The second-stage pickling and ultrasonic module 04, connected to the second-stage entry judgment module, receives the second-stage incoming roll, completes the second mixed acid, second acid concentration ratio, second pickling temperature, second roll feed speed, and ultrasonic treatment, and outputs the ultrasonically pickled roll. Specifically, the second-stage pickling and ultrasonic module is connected to the second-stage pickling tank, the second mixed acid supply unit, the temperature control unit, the pinch rollers, and the ultrasonic device. The second-stage pickling and ultrasonic module receives the second-stage incoming roll output from the second-stage entry judgment module and continuously feeds it into the second-stage pickling tank. After the roll enters the tank, the second-stage pickling and ultrasonic module retrieves the second mixed acid, maintains the second acid concentration ratio, controls the second pickling temperature, and simultaneously sets the second roll feed speed. The roll head enters the second-stage pickling tank first, the middle section follows continuously, the edges and local defect locations pass through the corresponding tank sections in the same running path, and the roll tail passes last. After the tape roll enters the corresponding section of the ultrasonic device, the second-stage pickling and ultrasonic module performs ultrasonic treatment on the currently passing tape roll section and records the ultrasonic treatment status corresponding to the current roll section position. If the tape roll section has not yet entered the ultrasonic device's action section, the second-stage pickling operation continues. If the tape roll section leaves the ultrasonic device's action section, the ultrasonic treatment of the corresponding section stops and the processing record is retained. After processing, an ultrasonic pickled tape roll is formed. The ultrasonic pickled tape roll is output to the replenishment and cycle switching module, serving as the ultrasonic pickled tape roll received by this module, and the second-stage pickling status and ultrasonic treatment status are synchronously retained.

[0175] The replenishment and circulation switching module 05, connected to the second-stage pickling and ultrasonic module, receives the ultrasonic pickling tape roll, collects free acid concentration, metal ion concentration, and working liquid level data, replenishes mixed acid and demineralized water, switches between small and large circulation cycles, and outputs the second-stage processing tape roll. Specifically, the replenishment and circulation switching module is connected to the free acid concentration collection unit, metal ion concentration collection unit, working liquid level collection unit, mixed acid replenishment unit, demineralized water replenishment unit, and circulation switching unit. The replenishment and circulation switching module receives the ultrasonic pickling tape roll from the second-stage pickling and ultrasonic module and collects the free acid concentration, metal ion concentration, and working liquid level as the tape roll passes through the inlet, middle, and outlet sections of the second-stage pickling tank. Based on the collected data, the replenishment and circulation switching module calls the mixed acid replenishment unit and the demineralized water replenishment unit. The free acid concentration corresponds to the mixed acid replenishment action, the working liquid level corresponds to the demineralized water replenishment action, and the metal ion concentration corresponds to the switching action of the circulation switching unit. The cycle switching unit performs small or large cycle switching on the current roll's running path and records the switching status synchronously with the current position of the ultrasonic pickling roll. If the currently passing roll belongs to the beginning, end, edge, or local defect location, the replenishment and cycle switching module retains the current switching status until the roll leaves the corresponding slot. After completing the acquisition, replenishment, and switching, a second-stage processed roll is formed. The second-stage processed roll is output to the clean water rinsing and hot air drying module, serving as the second-stage processed roll received by this module, and the replenishment and cycle switching records are stored for later retrieval.

[0176] The cleaning water rinsing and hot air drying module 06, connected to the replenishment and circulation switching module, receives the second-stage processed belt roll, completes cleaning water rinsing and hot air drying, and outputs the hot air-dried belt roll. Specifically, the cleaning water rinsing and hot air drying module is connected to the cleaning water rinsing section, spray section, guide section, drying unit, hot air inlet section, and hot air outlet section. The cleaning water rinsing and hot air drying module receives the second-stage processed belt roll from the replenishment and circulation switching module and first feeds the belt roll into the cleaning water rinsing section. When the belt head enters, the spray section rinsing the upper and lower surfaces of the belt head with cleaning water. During continuous operation in the middle section, the spray section simultaneously rinsing the middle and edges. When a local defect location enters, the module maintains the rinsing state of that section until that section leaves the spray section. The belt tail finally passes through the cleaning water rinsing section. After completing the cleaning water rinsing, the cleaning water rinsing and hot air drying module feeds the belt roll into the drying unit. The hot air inlet section begins supplying air when the belt head enters. The hot air channel sequentially dries the belt head, middle section, edges, areas with local defects, and tail. The hot air exhaust section maintains the current drying state until the belt tail leaves. After continuous rinsing and drying, a hot-air dried belt roll is formed. The hot-air dried belt roll is output to the winding judgment and winding module, serving as the hot-air dried belt roll received by this module, and the clean water rinsing status and hot air drying status are written into the current roll operation record.

[0177] The winding judgment and winding module 07, connected to the cleaning water rinsing and hot air drying module, is used to receive the hot air dried belt roll, complete the winding judgment and winding, and output a winding judgment record. Specifically, the winding judgment and winding module is connected to the winding machine, the drum, and the pressure roller. The winding judgment and winding module receives the hot air dried belt roll from the cleaning water rinsing and hot air drying module and reads the cleaning water rinsing status and hot air drying status of the same roll. After the belt head reaches the winding machine inlet, the winding judgment and winding module performs the winding judgment and guides the belt head to the starting winding position of the drum. The middle section continuously enters the drum and completes the winding. The edge and local defect positions are recorded synchronously during the winding process to record the current roll segment status. After the belt tail enters the drum, the entire roll is wound. The winding judgment and winding module generates a winding judgment record during the winding process, and the recorded content includes the current roll status, the repeat step call status, and the winding completion status. After winding is completed, the winding determination record is retained as an output object inside the module and is ready to be sent to the unwinding and surface treatment module.

Claims

1. A composite pickling method for titanium-carbon steel composite strip coils, characterized in that, include: S100. Based on the winding judgment record, obtain the surface-treated tape roll; The winding determination record includes whether the roll directly enters the unwinding process, whether it belongs to the repeated steps and returns to the roll, and the winding status of the beginning and end of the roll in the previous cycle. S200. Based on the surface-treated tape roll, the first stage of pickling and the first stage of data acquisition and recording are performed. Then, based on the first stage data acquisition and recording, the second stage of entry determination processing is performed to obtain the second stage entry tape roll. The first phase of data collection and processing includes: Data collection points were set up at the inlet, middle and outlet sections of the first-stage pickling tank to continuously collect data on the mixed acid state, metal ion concentration, pickling temperature and working liquid level. The head position, tail position, middle position, edge position, and local defect position are then correlated with the current roll feed speed to form the first stage data collection record; The second stage of the judgment and processing includes: Read the mixed acid state, metal ion concentration, pickling temperature, working liquid level, and roll material feed speed from the first stage acquisition record; Then read the head position, tail position, middle position, edge position and local defect position, and establish the corresponding relationship according to the order of the strip roll exiting the pickling tank in the first stage; If the strip head has left the first-stage pickling tank and the working liquid level of the corresponding outlet section is stable, then the strip section where the strip head is located is recorded as an accessible section. If the mixed acid state and metal ion concentration corresponding to the intermediate section are still within the current allowable operating range, then the intermediate section will be continuously recorded as an enterable segment. If the edge or local defect is still located in the middle or later section of the first-stage pickling tank, the corresponding area will remain in the first-stage pickling path and will not be merged into the accessible section. If the belt tail has not yet reached the exit section, the corresponding belt roll segment will remain in the first-stage pickling tank. Once the first accessible section is formed, the pinch rollers send an entry signal to the inlet section of the second-stage pickling tank. The pickling unit reads the entry signal synchronously and accepts the accessible section according to the current working state of the second-stage pickling tank. This forms the second stage of the tape roll, arranged along the continuous running direction; S300, based on the second stage of entering the tape roll, performs the second mixed acid and ultrasonic treatment, then collects the free acid concentration, metal ion concentration, working liquid level, and adds mixed acid and demineralized water, and switches between small circulation and large circulation treatment to obtain the second stage treated tape roll; The process of switching between small and large loops includes: When the metal ion concentration is higher than the current allowable operating value, the second-stage pickling tank switches to large circulation. When the area corresponding to the beginning, end, or local defects is passing through the inlet or outlet section of the second-stage pickling tank, maintain a small circulation and switch to a large circulation after the area has left. The small circulation is used for continuous reflux of a local section of the second-stage pickling tank, and the large circulation is used for reflux of the entire tank liquid in the second-stage pickling tank. Both correspond to the current operating position of the roll. S400: Based on the second-stage processing of the tape roll, a roll-up determination record is obtained.

2. The method according to claim 1, characterized in that, The process of obtaining surface-treated tape rolls includes: The process of obtaining the surface-treated strip includes: unwinding, shearing, centering, mechanical descaling, shot blasting, grinding and edge trimming. The unwinding process includes: releasing the tape roll according to the winding determination record; The shearing and leveling process includes: shearing and leveling the belt head and tail using an inlet shear; The centering process includes: adjusting the sheared and aligned strip roll to the center position of the pickling production line; The mechanical descaling and shot blasting process includes: using a scale breaking machine to break and loosen the oxide scale on the surface of the strip coil, and then using a shot blasting machine to continuously impact the surface of the strip coil. The grinding process includes: local removal of local defects that remain after mechanical descaling and shot blasting. The local defects include areas with concentrated residual oxide scale, sheared joints at the head of the belt, the end of the belt tail, and surface abnormalities near uneven edges. The edge trimming process includes: after grinding, the edge is continuously trimmed by a disc shear, and the uneven part of the trimmed edge enters the guide groove and is rolled into the edge wire roll.

3. The method according to claim 2, characterized in that, The first stage of pickling includes: The surface-treated strip is continuously fed into the first-stage pickling tank and continuously processed in the order of the strip head, middle section, strip tail, edge, and corresponding areas of local defects.

4. The method according to claim 1, characterized in that, The second mixed acid and ultrasonic treatment process includes: The second mixed acid treatment includes: continuously feeding the second stage roll into the second stage pickling tank, performing continuous operation processing in the order of the roll head, middle part, roll tail, edge and local defect corresponding areas, and calling the second acid concentration ratio, the second pickling temperature and the second roll feed speed. The ultrasonic treatment includes: arranging an ultrasonic device in or on the side of the second-stage pickling tank, activating ultrasonic treatment for the areas corresponding to the beginning, end, edge, and local defects of the belt, and adjusting the activation time of the ultrasonic treatment in sync with the belt roll area sequence and running speed.

5. The method according to claim 4, characterized in that, The process of acquiring and processing free acid concentration, metal ion concentration, and working liquid level includes: In the second stage, sampling points are set at the inlet, middle and outlet sections of the pickling tank to continuously collect data on free acid concentration, metal ion concentration and working liquid level, and the collected results are correlated with the current operating position of the ultrasonic pickling tape roll.

6. The method according to claim 5, characterized in that, The process of replenishing mixed acid and demineralized water includes: When the free acid concentration drops below the corresponding value in the current tank section's operating record, add mixed acid to the second-stage pickling tank; When the working liquid level drops, add demineralized water to the second-stage pickling tank.

7. The method according to claim 1, characterized in that, The process of obtaining the roll-up determination record includes: The process of obtaining the winding judgment record includes: rinsing with clean water, hot air drying, winding judgment and winding processing; The cleaning water rinsing process includes: continuously feeding the second-stage processed roll into the cleaning water rinsing section, and continuously rinsing the head, middle, tail, edge, and corresponding areas of local defects by the spray section, and increasing the dwell time or spray density when passing through the corresponding areas of local defects. The hot air drying process includes: continuously feeding the clean water-washed belt roll into the drying unit, providing hot air from the hot air inlet, hot air channel and hot air outlet, continuously drying the belt head, middle part, belt tail, edge and corresponding areas of local defects, and the hot air temperature continuously corresponding to the state of the belt roll after clean water washing. The winding determination process includes: reading the washing section operation record, hot air drying record, and the current passing status of the head, middle, tail, edge, and local defect corresponding areas; and continuously determining whether the head has entered the drum, whether there are uneven parts on the edge, and whether the local defect corresponding area needs to return to the repeating steps. If it is determined that the area corresponding to the local defect still needs to repeat the steps, then mark the segment in the winding judgment record so that the next cycle will repeat the steps after unwinding. The winding process includes: when the strip head passes through the winding machine inlet and the aforementioned operation record is normal, the strip head enters the drum and begins winding, the middle part is then continuously wound in, the edge part is wound in synchronously with the middle part, and the strip tail is finally wound in to complete the current roll winding.

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