Method and device for judging steel biting signal of mandrel and electronic equipment

Abstract

The invention discloses a mandrel steel biting signal judgment method and device and electronic equipment, and the method comprises the steps: controlling a wrapper roller group to be adjusted from position control to pressure control when detecting that the head of current strip steel passes through the wrapper roller group; the current torque of the mandrel is judged, if the current torque is larger than the first preset torque, the mandrel generates a steel biting signal, and if the current torque is smaller than or equal to the first preset torque, before it is detected that the head of the current strip steel passes through a pulse signal generated by the fourth circle of a first wrapper roller in the wrapper roller set, the second wrapper roller is started; continuously judging whether the current torque is greater than a first preset torque; if the current torque is continuously smaller than or equal to the first preset torque, when a pulse signal generated when the head of the current strip steel passes through the fourth circle of the first wrapper roller is detected, whether the current torque is larger than a second preset torque or not is judged, and if the current torque is larger than the second preset torque, the mandrel generates a steel biting signal. According to the method, the dependence on the precision of the mandrel and the wrapper roller can be effectively reduced, and the production reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of strip rolling technology, and in particular to a method, device and electronic equipment for judging mandrel biting signals. Background Technology

[0002] During use, the mandrel and auxiliary winding roller of the coiler may experience a decrease in precision due to wear, tonnage, or the quality of repairs. This decrease in precision causes the mandrel to fail to generate a bite signal, and this problem has occurred multiple times during production.

[0003] If the mandrel generates a bite signal prematurely, causing the auxiliary winding roller to execute pressure control before the strip enters the coiler, the strip head will not be bitten and will pile up. If the mandrel fails to generate a bite signal correctly, causing the auxiliary winding roller to not open according to the set number of turns, a steel pile-up accident can be avoided if the operator notices it in time and manually opens the auxiliary winding roller; otherwise, it will occur. To avoid these problems, a technology is needed that can still generate a mandrel bite signal normally even when the accuracy of the mandrel and auxiliary winding roller equipment deteriorates. Summary of the Invention

[0004] This application provides a method, device, and electronic device for judging mandrel biting signals. The method continuously judges the pulse signals when the strip is wound around the mandrel for 1 to 4 turns. By utilizing the characteristic that the torque increases significantly as the number of winding turns increases, the mandrel biting signal can be captured quickly. This method can effectively reduce the dependence on the accuracy of the mandrel and the auxiliary winding roller, and improve the reliability of production.

[0005] In a first aspect, the present invention provides the following technical solution through an embodiment of the present invention: A method for determining a mandrel biting signal includes: when the head of the current strip is detected passing through the coiling roller group, controlling the coiling roller group to switch from position control to pressure control; determining the current torque of the mandrel; if the current torque is greater than a first preset torque, the mandrel generates a biting signal; if the current torque is less than or equal to the first preset torque, before detecting a pulse signal generated by the head of the current strip passing through the fourth rotation of the first coiling roller in the coiling roller group, continuously determining whether the current torque is greater than the first preset torque; if it is continuously less than or equal to the first preset torque, when detecting a pulse signal generated by the head of the current strip passing through the fourth rotation of the first coiling roller, determining whether the current torque is greater than a second preset torque; if it is greater than the second preset torque, the mandrel generates a biting signal, wherein the second preset torque is less than the first preset torque.

[0006] Preferably, if the current torque is less than or equal to the second preset torque, the pulse signal generated when the head of the current strip passes the next revolution of the first auxiliary winding roller is detected until the pulse signal generated when the head of the current strip passes the ninth revolution of the first auxiliary winding roller is detected. If it is still less than or equal to the second preset torque, the determination ends.

[0007] Preferably, the first preset torque is equal to 15% of the rated torque, and the second preset torque is equal to 5% of the rated torque.

[0008] Preferably, before detecting that the head of the current strip has passed the coiling roller group, the method further includes: when detecting that the head of the current strip has entered the finishing mill entrance, determining whether the pinch roll group, mandrel, and coiling roller group in the coiling area are all in a preset waiting position; if they are all in the preset waiting position, when the head of the current strip travels to the position of the hot metal detector in the pinch roll group area, continuing to detect whether there is a strip head tracking signal in the pinch roll group area, and continuing to detect whether the pressure generated by the pinch roll group meets a preset condition; if any condition is met, the pinch roll group generates a bite signal.

[0009] Preferably, when the head of the current strip reaches the position of the hot metal detector in the pinch roll group area, the system continues to detect whether there is a strip head tracking signal in the pinch roll group area, and continues to detect whether the pressure generated by the pinch roll group meets a preset condition. If any condition is met, the pinch roll group generates a bite signal. This includes: if the hot metal detector located at the coiler inlet detects a strip head signal, the system continues to detect whether the straight-line distance between the head of the current strip and the pinch roll group is less than a first preset distance, and continues to detect whether the pressure of the pinch roll group is greater than a preset pressure. If any condition is met, the pinch roll group generates a bite signal.

[0010] Preferably, before continuing to detect whether the straight-line distance between the head of the current strip and the pinch roll group is less than a first preset distance, the method further includes: acquiring the current running speed of the strip and the first running time of the current strip after exiting the finishing work roll; determining the running distance of the current strip head after leaving the last finishing work roll based on the running speed and the first running time; and determining the straight-line distance between the head of the current strip and the pinch roll group based on the running distance and the distance between the last work roll and the center of the lower pinch roll of the pinch roll group.

[0011] Preferably, the winding assist roll group includes a first winding assist roll, a second winding assist roll, and a third winding assist roll. The step of determining whether the pinch roll group, mandrel, and winding assist rolls are all in a preset waiting position includes: determining whether the roll gap of the pinch roll group is 0.2~0.6mm smaller than the current strip thickness; if so, determining that the pinch roll group is in a preset waiting position; determining whether the diameter of the mandrel is between 730~750mm; if so, determining that the mandrel is in a preset waiting position; and determining whether the weld of the winding assist roll is 0.1~1.2mm wider than the current strip thickness, and that the weld of the first winding assist roll is larger than the weld of the second winding assist roll, and the weld of the second winding assist roll is larger than the weld of the third winding assist roll; if all conditions are met, determining that the winding assist roll is in a preset waiting position.

[0012] Preferably, the coiling roller group includes a first coiling roller, a second coiling roller, and a third coiling roller. After the pinch roller group generates a steel biting signal, and before detecting that the head of the current strip has passed through the coiling roller group, the method further includes: acquiring a first linear distance between the hot metal detector and the pinch roller group, a second linear distance between the pinch roller group and the first coiling roller, an initial gap value between adjacent coiling rollers in the coiling roller group, and a preset running distance after the head of the current strip leaves the hot metal detector; and determining whether the head of the current strip has passed through the first coiling roller, the second coiling roller, and the third coiling roller in the coiling roller group based on the first linear distance, the second linear distance, the initial gap value, and the preset running distance.

[0013] Secondly, through an embodiment of the present invention, the present invention provides the following technical solution: A device for determining a mandrel biting signal includes: The first control module is used to control the coiling roller group to switch from position control to pressure control when it detects that the head of the current strip has passed through the coiling roller group. The first judgment module is used to judge the current torque of the mandrel. If the current torque is greater than the first preset torque, the mandrel generates a steel biting signal. If the current torque is less than or equal to the first preset torque, the module continuously judges whether the current torque is greater than the first preset torque before detecting the pulse signal generated by the head of the current strip passing through the fourth turn of the first auxiliary winding roller. The second judgment module is used to determine whether the current torque is greater than the second preset torque when the pulse signal generated by the detection of the current strip head passing the fourth turn of the first auxiliary winding roller is continuously less than or equal to the first preset torque. If it is greater than the second preset torque, the mandrel generates a steel biting signal.

[0014] Thirdly, through one embodiment of the present invention, the following technical solution is provided: An electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in any of the first aspects above.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: The mandrel biting signal determination method provided in this embodiment of the invention, when detecting that the head of the current strip passes through the auxiliary winding roller group, controls the auxiliary winding roller group to be adjusted from position control to pressure control, and continues to determine the current torque of the mandrel. If it is continuously determined that the current torque is less than or equal to a first preset torque before the head of the strip passes through the fourth turn of the first auxiliary winding roller in the auxiliary winding roller group, then when the pulse signal generated by the head of the current strip passing through the fourth turn of the first auxiliary winding roller is detected, it is determined whether the current torque is greater than a second preset torque. If it is greater than the second preset torque, the mandrel generates a biting signal. This application addresses the problem in traditional technologies where, due to the decrease in the precision of the mandrel and auxiliary winding rollers, the mandrel cannot accurately detect changes exceeding the second preset torque when the strip head is wound to the fourth turn. This leads to the failure to generate a bite signal, which in turn causes the auxiliary winding rollers to fail to open the roll gap according to the set number of turns, resulting in steel pile-up during winding. This method expands the range of bite signal judgment from only the pulse signal of the fourth turn to all pulse signals up to the fourth turn. By utilizing the characteristic that the torque increases significantly with the number of winding turns, it fundamentally reduces the dependence on the precision of the mandrel and auxiliary winding rollers. Even if the precision of the mandrel and auxiliary winding rollers decreases, this method can quickly capture the mandrel bite signal, thereby reducing costs, improving production reliability, and avoiding steel pile-up accidents in the coiler. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the method for determining the mandrel biting signal in an embodiment of the present invention; Figure 2 This is a schematic diagram of the winding machine in an embodiment of the present invention; Figure 3 This is a schematic diagram of the device for determining the mandrel biting signal in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0018] This application provides a method, device, and electronic device for judging mandrel biting signals. The method continuously judges the pulse signals when the strip is wound around the mandrel from the 1st to the 4th turn. By utilizing the characteristic that the torque increases significantly as the number of turns increases, the mandrel biting signal is quickly captured, thereby reducing the dependence on the accuracy of the mandrel and the auxiliary winding roller and improving the reliability of production.

[0019] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows: A method for determining a mandrel biting signal includes: when the head of the current strip is detected passing through the coiling roller group, controlling the coiling roller group to switch from position control to pressure control; determining the current torque of the mandrel; if the current torque is greater than a first preset torque, the mandrel generates a biting signal; if the current torque is less than or equal to the first preset torque, before detecting the pulse signal generated by the head of the current strip passing through the fourth rotation of the first coiling roller in the coiling roller group, continuously determining whether the current torque is greater than the first preset torque; if it is continuously less than or equal to the first preset torque, when detecting the pulse signal generated by the head of the current strip passing through the fourth rotation of the first coiling roller, determining whether the current torque is greater than a second preset torque; if it is greater than the second preset torque, the mandrel generates a biting signal, wherein the second preset torque is less than the first preset torque.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] Existing methods for judging bite signals require high precision from the auxiliary winding roller and mandrel. However, as the mandrel and auxiliary winding roller of the coiler operate for a long time, their precision will significantly decrease due to factors such as wear, tonnage, or repair quality. To solve this problem, this application proposes a method for judging bite signals that does not require high precision from the auxiliary winding roller and mandrel.

[0022] Firstly, the embodiments of the present invention provide a method for determining a mandrel biting signal, specifically, as follows: Figure 1 As shown, the method includes the following steps S101 to S103: Step S101: When the head of the current strip is detected to pass through the coiling roller group, the coiling roller group is controlled to switch from position control to pressure control.

[0023] It should be noted that the mandrel biting signal referred to in this application is a signal used to determine that the strip head has been successfully wound on the mandrel; the pulse signal referred to below is a real-time signal, which generally lasts for a very short time and immediately returns to the original state after the signal is generated.

[0024] like Figure 2The diagram shows the equipment structure. 101 represents the layer cold roller conveyor, 102 represents the side guide plate, 103 represents the pinch roller group, 1031 represents the lower pinch roller, 1032 represents the upper pinch roller, 104 represents the hot metal detector, 105 represents the winding machine core shaft, and 106 represents the auxiliary winding roller group.

[0025] The winding roller assembly referred to in this application may include a first winding roller, a second winding roller, and a third winding roller, with the three winding rollers located above, below, and to the side of the mandrel, respectively.

[0026] In the specific implementation process, when it is detected that the head of the current strip passes through the coiling roller group 103, the control of the coiling roller group 103 is adjusted from position control to pressure control. This can include: when the head of the current strip passes through the first coiling roller, the second coiling roller and the third coiling roller in the coiling roller group, the control of the first coiling roller, the second coiling roller and the third coiling roller is adjusted from position control to pressure control in sequence according to the passing order.

[0027] Furthermore, before detecting that the head of the current strip has passed the coiling roller group, the process may further include: when detecting that the head of the current strip has entered the finishing mill entrance, determining whether the pinch roll group, mandrel, and coiling roller group in the coiling area are all in preset waiting positions; if they are all in preset waiting positions, then when the head of the current strip travels to the hot metal detector position in the pinch roll group area, continuing to detect whether there is a strip head tracking signal in the pinch roll group area, and continuing to detect whether the pressure generated by the pinch roll group meets preset conditions; if any condition is met, the pinch roll group generates a bite signal. This ensures that the bite signal is triggered only when specific working conditions are met (the strip actually enters the coiler), effectively avoiding steel piling accidents caused by premature action due to false signals, and improving the accuracy and stability of the control system.

[0028] In a specific embodiment, detecting the presence of a strip head tracking signal in the roll group area may include: if the hot metal detector (HMD) 104 located at the coiler inlet detects a strip head signal, and if the straight-line distance between the current strip head and the lower pinch roll is less than a first preset distance, then the presence of a strip head tracking signal in the pinch roll group area is detected.

[0029] In one embodiment, when the head of the current strip reaches the position of the hot metal detector 104 in the pinch roll group area, the system continues to detect whether there is a strip head tracking signal in the pinch roll group area, and continues to detect whether the pressure generated by the pinch roll group meets a preset condition. If either condition is met, the pinch roll group generates a bite signal. This may include: if the hot metal detector 104 located at the coiler inlet detects a strip head signal, the system continues to detect whether the straight distance between the head of the current strip and the pinch roll group is less than a first preset distance, and continues to detect whether the pressure of the pinch roll group is greater than a preset pressure. If either condition is met, the pinch roll group generates a bite signal.

[0030] In one embodiment, before continuing to detect whether the straight-line distance between the head of the current strip and the pinch roll group is less than a first preset distance, the method further includes: acquiring the current running speed of the strip and the first running time of the current strip after exiting the finishing work roll; determining the running distance of the current strip head after leaving the last finishing work roll based on the running speed and the first running time; and determining the straight-line distance between the head of the current strip and the pinch roll group based on the running distance and the distance between the last work roll and the center of the lower pinch roll of the pinch roll group.

[0031] Based on the running distance and the distance between the center of the last working roll and the center of the lower pinch roll of the pinch roll group, the straight-line distance between the head of the current strip and the pinch roll group can be determined. This can include: subtracting the running distance S1 from the distance S2 between the center of the last working roll and the center of the lower pinch roll to determine the straight-line distance Sm between the head of the current strip and the center of the lower pinch roll.

[0032] Specifically, the distance Sm between the head of the strip and the center of the lower pinch roll can be calculated as follows: Sm = S2 - S1, where S1 is the distance from the head of the strip to the last work roll (e.g., ...). Figure 2 The integral formula for calculating the distance S1 (in F7) is: S1 = dt, V1 is the set speed of the strip, t1 is the running time of the strip after exiting the finishing mill (first running time), and S2 is the straight-line distance (mechanical distance) from the last work roll F7 of the finishing mill to the center of the lower pinch roll.

[0033] It should be noted that the finishing mill consists of multiple stands, numbered from F1 to F7. F1 is the starting stand for finishing milling, and F7 is the last stand.

[0034] In actual production, the running speed of the strip can be obtained through laser equipment or a rotary encoder (which detects the rotational speed and diameter of the work roll to calculate the strip speed).

[0035] Preferably, the first preset distance can be 2~4m, for example 3m. The hot metal detector 107 is used to detect the actual position of the strip steel.

[0036] Among them, continuing to detect whether the pressure of the pinch roller group is greater than the preset pressure can be done by detecting whether the pressure of the upper pinch roller in the pinch roller group is greater than the preset pressure.

[0037] Preferably, the preset pressure can be 20~30KN, for example 25KN. Thus, if a strip head tracking signal is detected in the pinch roll group area or the pressure of the pinch roll group is detected to be >25KN, the pinch roll group generates a strip bite signal.

[0038] In one embodiment, determining whether the pinch roll group, mandrel, and auxiliary winding roll are all in a preset waiting position may include: determining whether the roll gap of the pinch roll group is 0.2~0.6mm smaller than the thickness of the current strip; if so, determining that the pinch roll group is in a preset waiting position; determining whether the diameter of the mandrel is between 730~750mm; if so, determining that the mandrel is in a preset waiting position; determining whether the weld of the auxiliary winding roll is 0.1~1.2mm wider than the thickness of the current strip, and whether the weld of the first auxiliary winding roll is larger than the weld of the second auxiliary winding roll, and the weld of the second auxiliary winding roll is larger than the weld of the third auxiliary winding roll; if all conditions are met, determining that the auxiliary winding roll is in a preset waiting position.

[0039] For example, if the gap of the pinch roll assembly is 0.5 mm smaller than the thickness of the current strip, the diameter of the mandrel is 745 mm, the weld of the first auxiliary roll is 0.2 mm wider than the thickness of the current strip, the weld of the first auxiliary roll is 0.3 mm larger than the gap of the second auxiliary roll, and the gap of the second auxiliary roll is 0.3 mm larger than the gap of the third auxiliary roll, then the pinch roll assembly, the mandrel, and the auxiliary roll assembly are all in the preset waiting position.

[0040] Therefore, when the strip head reaches the finishing mill entrance area (i.e., the finishing mill work roll area), if the coiling entrance pinch roll group, mandrel, and auxiliary coiling roll group are all in the preset waiting position, the calculation begins when the strip head reaches the HMD before the pinch roll group. The tracking distance of the strip head through this HMD is used to determine whether there is a strip head tracking signal in the pinch roll group area (i.e., the coiler entrance HMD detects the signal and the distance Sm from the strip head to the pinch roll is < 3m), or whether the pressure generated by the pinch roll group is > 25KN. If either condition is met, the pinch roll group generates a bite signal.

[0041] In one embodiment, after the pinch roll group generates a bite signal and before detecting that the head of the current strip has passed the coiling roller group, the method may further include: acquiring a first linear distance between the hot metal detector and the pinch roll group, a second linear distance between the pinch roll group and the first coiling roller, an initial gap value between adjacent coiling rollers in the coiling roller group, and a preset running distance after the head of the current strip leaves the hot metal detector; and determining whether the head of the current strip has passed the first coiling roller, the second coiling roller, and the third coiling roller in the coiling roller group based on the first linear distance, the second linear distance, the initial gap value, and the preset running distance.

[0042] The first straight-line distance between the HMD and the pinch roll group (e.g., the center of the lower pinch roll) is set as S1, the second straight-line distance between the pinch roll group (the center of the lower pinch roll) and the first auxiliary winding roll is set as S2, and when pre-swinging the roll gap, the initial gap value (arc distance) between adjacent auxiliary winding rolls in the auxiliary winding roll group is set as S3, where the arc distance refers to the arc length between the centers of adjacent auxiliary winding rolls along the circumferential direction of the mandrel.

[0043] In a specific embodiment, obtaining the preset running distance after the head of the current strip leaves the hot metal detector may include: obtaining the second running time t2 after the head of the current strip passes the HMD and the actual running speed v2 after the head of the current strip passes the HMD; and determining the preset running distance Sn after the head of the current strip leaves the hot metal detector based on the second running time t2 and the actual running speed v2.

[0044] Specifically, based on the second running time t2 and the actual running speed v2, the preset running distance (i.e., tracking distance) Sn after the head of the current strip leaves the hot metal detector is determined, which may include: According to the formula Sn = dt is the preset running distance Sn after the head of the current strip leaves the hot metal detector, where t2 is the second running time of the strip after passing the HMD, and V2 is the actual running speed of the strip.

[0045] In a specific embodiment, determining whether the head of the current strip has passed the first, second, and third auxiliary coiling rollers in the auxiliary coiling roller group based on the first straight-line distance S1, the second straight-line distance S2, the initial gap value S3, and the preset running distance S4 may include: Determine whether the preset running distance S4 is equal to the sum of the first straight distance S1 and the second straight distance S2. If so, the head of the current strip passes through the first auxiliary winding roller in the auxiliary winding roller group. Determine whether the preset running distance S4 is equal to the sum of the first straight distance S1, the second straight distance S2 and the initial gap value S3. If so, the head of the current strip passes through the second auxiliary winding roller in the auxiliary winding roller group. Determine whether the preset running distance S4 is equal to the sum of the first straight distance S1, the second straight distance S2 and twice the initial gap value S3. If so, the head of the current strip passes through the third auxiliary winding roller in the auxiliary winding roller group.

[0046] That is, the judgment condition for the strip head to follow the first auxiliary roll is: Sn=S1+S2; the judgment condition for the strip head to follow the second auxiliary roll is: Sn=S1+S2+S3; the judgment condition for the strip head to follow the third auxiliary roll is: Sn=S1+S2+2S3.

[0047] Step S102: Determine the current torque of the mandrel. If the current torque is greater than the first preset torque, the mandrel generates a steel biting signal. If the current torque is less than or equal to the first preset torque, before detecting the pulse signal generated by the fourth rotation of the first auxiliary coiling roller in the auxiliary coiling roller group at the head of the current strip, continuously determine whether the current torque is greater than the first preset torque. Step S103: If the current torque is continuously less than or equal to the first preset torque, when a pulse signal is detected generated when the head of the current strip passes through the fourth turn of the first auxiliary winding roller, it is determined whether the current torque is greater than the second preset torque. If it is greater than the second preset torque, the mandrel generates a steel biting signal, wherein the second preset torque is less than the first preset torque.

[0048] In one embodiment, the first preset torque is equal to 15% of the rated torque, and the second preset torque is equal to 5% of the rated torque.

[0049] Furthermore, if the current torque is less than or equal to the second preset torque, the pulse signal generated when the head of the current strip passes the first auxiliary winding roller for the next revolution is detected until the pulse signal generated when the head of the current strip passes the first auxiliary winding roller for the ninth revolution is detected. If it is still less than or equal to the second preset torque, the judgment ends.

[0050] In a specific embodiment, after the first, second, and third auxiliary winding rollers respectively start pressure control from position control, the mandrel torque is judged. If the mandrel torque exceeds 15% of the rated torque, the mandrel generates a bite signal. If no bite signal is generated, this condition is judged until a bite signal is generated (i.e., when the pulse signal generated by the strip head passing through the first winding roller in the first rotation is detected, it is judged whether the mandrel torque exceeds 15% of the rated torque; if not, when the pulse signal generated by the strip head passing through the first winding roller in the second rotation is detected, it is judged whether the mandrel torque exceeds 15% of the rated torque; if not, when the pulse signal generated by the strip head passing through the first winding roller in the third rotation is detected, it is judged whether the mandrel torque exceeds 5% of the rated torque). This continues until the pulse signal generated by the strip head passing through the first winding roller in the fourth rotation is detected, at which point the mandrel torque is judged whether it exceeds 5% of the rated torque. If the mandrel torque is greater than 5% of the rated torque, the mandrel generates a bite signal.

[0051] If it is determined that the mandrel torque is still less than or equal to 5% of the rated torque, then when the pulse signal generated by the strip head passing through the 5th turn of the first auxiliary winding roller is detected, it is determined whether the mandrel torque exceeds 5% of the rated torque. If so, the mandrel generates a steel biting signal. If it is determined that the mandrel torque is still less than or equal to 5% of the rated torque, then when the pulse signal generated by the strip head passing through the 6th turn of the first auxiliary winding roller is detected, it is determined whether the mandrel torque exceeds 5% of the rated torque. If so, the mandrel generates a steel biting signal. If it is determined that the mandrel torque is still less than or equal to 5% of the rated torque, then when the pulse signal generated by the strip head passing through the 7th turn of the first auxiliary winding roller is detected, it is determined whether the mandrel torque exceeds 5% of the rated torque. If so, the mandrel generates a steel biting signal. If it is determined that the mandrel torque is still less than or equal to 5% of the rated torque, then when the pulse signal generated by the strip head passing through the 8th turn of the first auxiliary winding roller is detected, it is determined whether the mandrel torque exceeds 5% of the rated torque. If so, the mandrel generates a steel biting signal. If it is determined that the mandrel torque is still less than or equal to 5% of the rated torque, then when the pulse signal generated by the strip head passing through the 9th rotation of the first auxiliary winding roller is detected, it is determined whether the mandrel torque exceeds 5% of the rated torque. If yes, the mandrel generates a steel biting signal; otherwise, the judgment ends.

[0052] If any of the above conditions is met, a mandrel biting signal will be generated, and the auxiliary roll will execute the roll gap opening command after the strip reaches the number of turns set at the second level.

[0053] During this process, when the number of turns of the strip on the mandrel reaches a certain value (4 to 9 turns), it can ensure that there is enough friction between the strip and the mandrel to transmit torque. When the torque reaches a certain value, it indicates that the strip has generated enough force on the mandrel. The combined effect of the two can effectively avoid false signals. At this time, it is determined that the mandrel is biting the strip and a signal is issued.

[0054] In a specific embodiment, detecting the pulse signal generated when the head of the current strip passes the fourth turn of the first auxiliary coiling roller may include: acquiring the first linear distance between the hot metal detector and the feeding roller group, the second linear distance between the pinch roller group and the first auxiliary coiling roller, the initial gap value between adjacent auxiliary coiling rollers among the multiple auxiliary coiling rollers, the preset running distance, the strip thickness, and the mandrel diameter; and detecting whether the head of the current strip has passed the fourth turn of the first auxiliary coiling roller based on the first linear distance, the second linear distance, the initial gap value, the preset running distance, the strip thickness, and the mandrel diameter.

[0055] In a specific embodiment, assuming the strip thickness is H and the mandrel diameter is D, the signal condition for the strip head to pass through the first auxiliary winding roller for the first turn (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the first turn) is: the preset running distance (tracking distance) S4 is equal to the sum of the first straight distance S1, the second straight distance S2 and three times the initial gap value S3 (Sn=S1+S2+3S3). The signal condition for the strip head to pass through the first auxiliary winding roller for the second time (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the second time) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + H) / D; The signal condition for the strip head to pass through the first auxiliary winding roller for the third time (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the third time) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 2H) / D; The signal condition for the strip head to pass the 4th turn of the first auxiliary winding roller (i.e., the pulse signal generated when the strip head passes the 4th turn of the first auxiliary winding roller) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 3H) / D; The signal condition for the strip head to pass through the first auxiliary winding roller for the 5th turn (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the 5th turn) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 4H) / D; The signal condition for the strip head to pass through the first auxiliary winding roller for the 6th turn (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the 6th turn) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 5H) / D; The signal condition for the strip head to pass through the 7th turn of the first auxiliary winding roller (i.e., the pulse signal generated when the strip head passes through the 7th turn of the first auxiliary winding roller) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 6H) / D; The signal condition for the strip head to pass through the first auxiliary winding roller for the 8th time (i.e., the pulse signal generated when the strip head passes through the first auxiliary winding roller for the 8th time) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 7H) / D; The signal condition for the strip head to pass through the 9th turn of the first auxiliary winding roller (i.e., the pulse signal generated when the strip head passes through the 9th turn of the first auxiliary winding roller) is: Sn = S1 + S2 + 3S3 + 3S3 × (D + 8H) / D.

[0056] Furthermore, to achieve an emergency early warning function, if no bite signal is generated after the strip head has passed the first auxiliary winding roll for 9 turns, the control alarm will issue an early warning signal to remind personnel to take immediate action. This alarm can be an audible and visual alarm.

[0057] To address the issue of false bite signals caused by abnormal instantaneous torque during mandrel speed-up, a new judgment condition for mandrel bite signals is proposed. This effectively avoids false triggering caused by mandrel jamming or abnormal instantaneous torque during speed-up, prevents premature action of the auxiliary winding roller causing steel accumulation, and avoids situations where the mandrel generates an instantaneous torque greater than 15% of the rated torque during speed-up before the strip head enters the coiler. This would cause the mandrel to generate a bite signal prematurely, leading to premature pressure control by the auxiliary winding roller, resulting in the auxiliary winding roller failing to bite the accumulated steel.

[0058] Secondly, the range for judging the bite signal was expanded from only the 4th pulse signal to the 4th to 9th pulse signals. Utilizing the characteristic that torque increases significantly with the number of winding turns, this reduces the dependence on the accuracy of the mandrel and auxiliary winding rollers, improving the reliability of signal recognition. This improvement not only solves the problem of insufficient torque to generate a signal at low winding turns but also improves the fault tolerance of signal detection, adapting to the accuracy degradation caused by long-term equipment wear. It reduces false alarm rates and avoids the risk of not generating a bite signal, thereby significantly reducing the probability of steel stacking accidents, extending equipment lifespan, and reducing maintenance costs and downtime.

[0059] This method effectively reduces the risk of failing to detect mandrel biting signals due to equipment precision degradation, and is particularly suitable for operating conditions where precision declines after long-term operation. It also reduces the stringent precision requirements of mechanical components for biting signals. Through improvements, biting signals can still be generated normally even when the precision of the coiler mandrel and auxiliary coiling rollers deteriorates during use, preventing coiler stacking accidents and significantly improving the system's stability and reliability.

[0060] In summary, the method for determining mandrel biting signals provided by the embodiments of the present invention can effectively reduce the dependence on the accuracy of the mandrel and the auxiliary winding roller. Even if the accuracy of the mandrel and the auxiliary winding roller is reduced, the mandrel biting signal can still be captured quickly, thereby reducing costs, improving production reliability, and avoiding steel stacking accidents in the coiler.

[0061] Secondly, based on the same inventive concept, this embodiment provides a device for determining a mandrel biting signal, such as... Figure 3 As shown, it includes: The first control module 401 is used to control the coiling roller group to switch from position control to pressure control when it detects that the head of the current strip has passed through the coiling roller group. The first judgment module 402 is used to judge the current torque of the mandrel. If the current torque is greater than the first preset torque, the mandrel generates a steel biting signal. If the current torque is less than or equal to the first preset torque, the current torque is continuously judged to be greater than the first preset torque before the pulse signal generated by the head of the current strip passing through the fourth turn of the first auxiliary winding roller is detected. The second judgment module 403 is used to determine whether the current torque is greater than the second preset torque when the pulse signal generated by the head of the current strip passing the fourth turn of the first auxiliary winding roller is detected if the current torque is continuously less than or equal to the first preset torque. If the current torque is greater than the second preset torque, the mandrel generates a steel biting signal.

[0062] As an optional embodiment, if the current torque is less than or equal to the second preset torque, the pulse signal generated when the head of the current strip passes the next revolution of the first auxiliary winding roller is detected until the pulse signal generated when the head of the current strip passes the ninth revolution of the first auxiliary winding roller is detected. If it is still less than or equal to the second preset torque, the determination ends.

[0063] As an optional embodiment, the first preset torque is equal to 15% of the rated torque, and the second preset torque is equal to 5% of the rated torque.

[0064] As an optional embodiment, the device further includes: a third judgment module, used to determine whether the pinch roll group, mandrel and auxiliary coiling roll group in the coiling area are all in preset waiting positions when the head of the current strip enters the entrance of the finishing mill; if they are all in preset waiting positions, then when the head of the current strip travels to the position of the hot metal detector in the pinch roll group area, it continues to detect whether there is a strip head tracking signal in the pinch roll group area, and continues to detect whether the pressure generated by the pinch roll group meets preset conditions; if any condition is met, the pinch roll group generates a bite signal.

[0065] As an optional embodiment, the third judgment module is specifically used to: if the hot metal detector set at the coiler inlet detects the strip head signal, continue to detect whether the straight distance between the current strip head and the pinch roll group is less than a first preset distance, and continue to detect whether the pressure of the pinch roll group is greater than a preset pressure. If any condition is met, the pinch roll group generates a bite signal.

[0066] As an optional embodiment, the third judgment module is specifically used to: obtain the current running speed of the strip and the first running time of the current strip after exiting the finishing work roll; determine the running distance of the current strip head after leaving the last finishing work roll based on the running speed and the first running time; and determine the straight-line distance between the current strip head and the pinch roll group based on the running distance and the distance between the last work roll and the center of the lower pinch roll of the pinch roll group.

[0067] As an optional embodiment, the assist roll group includes a first assist roll, a second assist roll, and a third assist roll. The third judgment module is specifically used to: determine whether the roll gap of the pinch roll group is 0.2~0.6mm smaller than the thickness of the current strip; if so, determine that the pinch roll group is in a preset waiting position; determine whether the diameter of the mandrel is between 730~750mm; if so, determine that the mandrel is in a preset waiting position; determine whether the weld of the assist roll is 0.1~1.2mm wider than the thickness of the current strip, and whether the weld of the first assist roll is larger than the weld of the second assist roll, and the weld of the second assist roll is larger than the weld of the third assist roll; if all conditions are met, determine that the assist roll is in a preset waiting position.

[0068] As an optional embodiment, the coiling roller group includes a first coiling roller, a second coiling roller, and a third coiling roller. The third judgment module is specifically used to: obtain the first linear distance between the hot metal detector and the pinch roller group, the second linear distance between the pinch roller group and the first coiling roller, the initial gap value between adjacent coiling rollers in the coiling roller group, and the preset running distance after the head of the current strip leaves the hot metal detector; and determine whether the head of the current strip has passed through the first coiling roller, the second coiling roller, and the third coiling roller in the coiling roller group based on the first linear distance, the second linear distance, the initial gap value, and the preset running distance.

[0069] Each of the above modules can be implemented using software code, in which case they can be stored in the memory of the control device. Alternatively, each of the above modules can be implemented using hardware, such as integrated circuit chips.

[0070] The mandrel biting signal judgment device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0071] Thirdly, based on the same inventive concept, this embodiment provides an electronic device 500, such as... Figure 4 As shown, it includes: a memory 501, a processor 502, and a computer program 503 stored in the memory and executable on the processor. When the processor 502 executes the program, it implements the steps of the method for determining the mandrel biting signal described in the first aspect above.

[0072] Since the electronic device described in this embodiment is the electronic device used to implement the mandrel biting signal determination method in the embodiments of this application, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the mandrel biting signal determination method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the mandrel biting signal determination method in the embodiments of this application falls within the scope of protection of this application.

[0073] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0074] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A module that specifies the function in one or more boxes.

[0075] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction modules implemented in a process. Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0076] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0077] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0078] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for determining a mandrel biting steel signal, characterized in that, include: When the head of the current strip is detected to have passed the coiling roller group, the coiling roller group is controlled to switch from position control to pressure control. The current torque of the mandrel is determined. If the current torque is greater than the first preset torque, the mandrel generates a steel biting signal. If the current torque is less than or equal to the first preset torque, the current torque is continuously determined to be greater than the first preset torque before the pulse signal generated by the fourth turn of the first auxiliary roll in the auxiliary roll group is detected at the head of the current strip. If the current torque is consistently less than or equal to the first preset torque, then when a pulse signal is detected generated when the head of the current strip passes through the fourth turn of the first auxiliary winding roller, it is determined whether the current torque is greater than the second preset torque. If it is greater than the second preset torque, then the mandrel generates a steel biting signal, wherein the second preset torque is less than the first preset torque.

2. The method for determining a mandrel biting signal as described in claim 1, characterized in that, If the current torque is less than or equal to the second preset torque, continue to detect the pulse signal generated when the head of the current strip passes the next revolution of the first auxiliary winding roller, until the pulse signal generated when the head of the current strip passes the ninth revolution of the first auxiliary winding roller is detected. If it is still less than or equal to the second preset torque, the judgment ends.

3. The method for determining a mandrel biting signal as described in claim 2, characterized in that, The first preset torque is equal to 15% of the rated torque, and the second preset torque is equal to 5% of the rated torque.

4. The method for determining a mandrel biting signal as described in claim 1, characterized in that, The process of detecting the head of the current strip passing through the coiling roller group also includes: When the head of the current strip enters the entrance of the finishing mill, it is determined whether the pinch roll group, mandrel and auxiliary coiling roll group in the coiling area are all in the preset waiting position; If both are in the preset waiting position, when the head of the current strip travels to the position of the hot metal detector in the pinch roll group area, the system continues to detect whether there is a strip head tracking signal in the pinch roll group area, and continues to detect whether the pressure generated by the pinch roll group meets the preset conditions. If any condition is met, the pinch roll group generates a steel bite signal.

5. The method for determining a mandrel biting signal as described in claim 4, characterized in that, When the head of the current strip reaches the position of the hot metal detector in the pinch roll group area, the system continues to detect whether there is a strip head tracking signal in the pinch roll group area, and continues to detect whether the pressure generated by the pinch roll group meets preset conditions. If either condition is met, the pinch roll group generates a bite signal, including: If the hot metal detector at the coiler inlet detects a strip head signal, it continues to detect whether the straight-line distance between the current strip head and the pinch roll group is less than a first preset distance, and continues to detect whether the pressure of the pinch roll group is greater than a preset pressure. If any condition is met, the pinch roll group generates a bite signal.

6. The method for determining a mandrel biting signal as described in claim 5, characterized in that, Before continuing to detect whether the straight-line distance between the head of the current strip and the pinch roll group is less than a first preset distance, the method further includes: Obtain the current running speed of the strip and the first running time of the strip after exiting the finishing mill roll; Based on the operating speed and the first running time, the running distance of the current strip head after leaving the last work roll of the finishing mill is determined; Based on the running distance and the distance between the center of the last working roll and the center of the lower pinch roll of the pinch roll group, the straight-line distance between the head of the current strip and the pinch roll group is determined.

7. The method for determining a mandrel biting signal as described in claim 4, characterized in that, The winding aid roller group includes a first winding aid roller, a second winding aid roller, and a third winding aid roller. The step of determining whether the pinch roller group, the mandrel, and the winding aid rollers are all in a preset waiting position includes: Determine whether the roll gap of the pinch roll group is 0.2~0.6mm smaller than the thickness of the current strip. If so, determine that the pinch roll group is in the preset waiting position. Determine if the diameter of the mandrel is between 730 and 750 mm. If so, determine that the mandrel is in a preset waiting position. Determine whether the weld of the auxiliary coiling roller is 0.1~1.2mm wider than the thickness of the current strip, and whether the weld of the first auxiliary coiling roller is larger than the weld of the second auxiliary coiling roller, and the weld of the second auxiliary coiling roller is larger than the weld of the third auxiliary coiling roller. If all conditions are met, then the auxiliary coiling roller is determined to be in a preset waiting position.

8. The method for determining a mandrel biting signal as described in claim 4, characterized in that, The coiling roller assembly includes a first coiling roller, a second coiling roller, and a third coiling roller. After the pinch roller assembly generates a bite signal, and before detecting that the head of the current strip has passed through the coiling roller assembly, the assembly further includes: The first straight-line distance between the hot metal detector and the pinch roll group, the second straight-line distance between the pinch roll group and the first coiling roller, the initial gap value between adjacent coiling rollers in the coiling roller group, and the preset running distance after the head of the current strip leaves the hot metal detector are obtained. Based on the first straight-line distance, the second straight-line distance, the initial gap value, and the preset running distance, it is determined whether the head of the current strip has passed through the first, second, and third auxiliary coiling rollers in the auxiliary coiling roller group.

9. A device for determining a mandrel biting steel signal, characterized in that, include: The first control module is used to control the coiling roller group to switch from position control to pressure control when it detects that the head of the current strip has passed through the coiling roller group. The first judgment module is used to judge the current torque of the mandrel. If the current torque is greater than the first preset torque, the mandrel generates a steel biting signal. If the current torque is less than or equal to the first preset torque, the module continuously judges whether the current torque is greater than the first preset torque before detecting the pulse signal generated by the head of the current strip passing through the fourth turn of the first auxiliary winding roller. The second judgment module is used to determine whether the current torque is greater than the second preset torque when the pulse signal generated by the detection of the current strip head passing the fourth turn of the first auxiliary winding roller is continuously less than or equal to the first preset torque. If it is greater than the second preset torque, the mandrel generates a steel biting signal.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method according to any one of claims 1-8.

Images