Air cushion furnace process section tension control device and control method

Abstract

The application discloses a kind of air cushion furnace process section tension control equipment, including tensioning machine roller group, detection mechanism and furnace front carrier roller, and tensioning machine roller group and furnace front carrier roller are cooperated with strip winding;Further including the control system being respectively communicated with tensioning machine roller group and detection mechanism, control system can control the rotating speed of tensioning machine roller group according to the tensioning degree parameter of strip fed back by detection mechanism;Detection mechanism includes first detection device and second detection device, if the thickness of strip is less than set thickness, then the tensioning degree parameter of strip is detected by first detection device;If the thickness of strip is greater than set thickness, then the tensioning degree parameter of strip is detected by second detection device.The air cushion furnace process section tension control equipment is higher in control precision to the tension of strip, can satisfy the tension control demand under the working condition of smaller tension.The application further discloses an air cushion furnace process section tension control method applied to the air cushion furnace process section tension control equipment.

Description

Technical Field

[0001] This invention relates to the technical field of tension control methods and supporting equipment for the process section of an air cushion furnace, and particularly to a tension control device for the process section of an air cushion furnace. This invention also relates to a tension control method for the process section of an air cushion furnace using this tension control device. Background Technology

[0002] The full name of an air cushion furnace is air cushion continuous heat treatment furnace, which is a very common metal processing furnace equipment in actual production in metal rolling plants. During the actual operation of the air cushion furnace, the tension control of the metal strip being processed determines the final processing effect and product quality.

[0003] The existing strip tension control method in the air cushion furnace process section is usually an indirect control method. That is, by using a preset tension stress value, combined with data such as strip width and thickness, the target tension in the furnace is calculated. The target tension is then distributed to the set torque of each tension roller motor according to the torque ratio. This set torque also needs to add the friction loss compensation torque of the tensioning unit, the inertia compensation torque during acceleration and deceleration, etc., and then the torque of the tensioning unit is limited by the frequency converter to achieve the purpose of controlling the tension stress of the strip.

[0004] However, existing technologies provide only coarse compensation data for friction loss and inertia during acceleration and deceleration in tensioning units, often failing to achieve precise compensation. Furthermore, existing indirect tension control methods, under conditions requiring lower tension control, are prone to significant tension fluctuations due to the small target tension value. In some cases, excessive tension control can even cause the strip to be stretched narrow within the air-cushion furnace, resulting in scrap. This not only affects the processing efficiency of the air-cushion furnace but also negatively impacts product quality.

[0005] Therefore, how to optimize the control accuracy of strip tension in the air cushion furnace process section to meet the tension control requirements under conditions of low tension is an important technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a tension control device for the process section of an air cushion furnace. This device offers high precision in controlling the tension of the strip, meeting the tension control requirements under conditions of low tension. Another purpose of this invention is to provide a tension control method for the process section of an air cushion furnace that utilizes this device.

[0007] To solve the above technical problems, the present invention provides a tension control device for the process section of an air cushion furnace, comprising a tensioning roller group, a detection mechanism, and a furnace front support roller arranged sequentially upstream of the furnace body along the strip conveying direction, wherein the tensioning roller group and the furnace front support roller are both in cooperation with the strip roller winding.

[0008] It also includes a control system that is communicatively connected to the tensioner roller group and the detection mechanism, respectively. The control system can control the rotation speed of the tensioner roller group according to the strip tension parameters fed back by the detection mechanism.

[0009] The testing mechanism includes a first testing device and a second testing device. If the thickness of the strip is less than the set thickness, the tension parameter of the strip is detected by the first testing device; if the thickness of the strip is greater than the set thickness, the tension parameter of the strip is detected by the second testing device.

[0010] Preferably, the first detection device is a sag detection device arranged along the strip conveying direction between the tensioner roller group and the furnace front idler roller. The sag detection device is positioned above the midpoint of the strip between the tensioner roller group and the furnace front idler roller, and the sag detection device is clearance-fitted with the strip.

[0011] The tension parameter of the strip detected by the first detection device is the vertical sag distance of the strip located between the tensioning roller group and the furnace front idler roller.

[0012] Preferably, the sag detection device is an ultrasonic rangefinder.

[0013] Preferably, the second detection device includes a lower measuring roller arranged along the strip conveying direction between the tensioner roller group and the furnace front idler roller, and a tension meter and a lifting mechanism cooperating with the lower measuring roller. The lower measuring roller is positioned below the midpoint of the strip located between the tensioner roller group and the furnace front idler roller.

[0014] The second detection device also includes two upper tension rollers arranged sequentially between the tensioner roller group and the furnace front support roller along the strip conveying direction. The upper tension rollers are located above the strip, and a tension measurement gap is formed between the two upper tension rollers to align with the lower tension roller in the vertical direction. The lower tension roller can be vertically lifted and aligned into the tension measurement gap under the drive of the lifting mechanism, so as to push the strip into the tension measurement gap from bottom to top and tension it.

[0015] The tension parameter of the strip detected by the second detection device is the measured value of the tension meter.

[0016] Preferably, the tension meter is a piezomagnetic force sensor.

[0017] Preferably, the lifting mechanism is a worm gear mechanism.

[0018] Preferably, the first detection device is arranged vertically above the tension gap.

[0019] Preferably, the control system includes a human-machine interface module, a PLC controller, and a drive system that are interconnected.

[0020] The PLC controller includes PID controllers that cooperate with the human-machine interface module and the drive system respectively;

[0021] The drive system includes a motor that drives the tensioner roller assembly and a drive frequency converter that controls the speed of the motor.

[0022] This invention also provides a tension control method for the process section of an air cushion furnace, which employs the tension control equipment for the process section of an air cushion furnace as described above, and includes the following steps:

[0023] The parameter detection involves a detection mechanism that detects the strip material located between the tensioner roller group and the furnace front idler roller to obtain the strip tension parameter, which is then transmitted and fed back to the control system. Specifically, if the strip thickness is less than the set thickness, the first detection device detects the strip tension parameter; if the strip thickness is greater than the set thickness, the second detection device detects the strip tension parameter.

[0024] Data processing and control system calculates the actual tension of the strip being processed by the equipment based on the received tension parameters, and compares the actual tension with the preset target tension value in the furnace.

[0025] The compensation adjustment system adjusts the rotational speed of the tensioner rollers based on the comparison between the actual tension value and the target tension value in the furnace, thereby adjusting the strip tension until the actual strip tension value is equal to the target tension value in the furnace.

[0026] Preferably, in the parameter detection step, if the tension parameter of the strip is detected and fed back by the first detection device, the tension parameter is the vertical sag distance of the strip located between the tensioning roller group and the furnace front idler roller; if the tension parameter of the strip is detected and fed back by the second detection device, the tension parameter is the measured value of the tension meter.

[0027] Compared to the aforementioned background technology, the tension control equipment for the air cushion furnace process section provided by the present invention, during its operation, selects either a first detection device or a second detection device to detect the tension parameter of the strip based on parameters such as the thickness and density of the strip. This aims to reflect the current tension state of the strip through the measurement of the tension parameter. The detection mechanism transmits the measured tension parameter back to the control system. The control system calculates the actual tension force of the strip currently being processed by the equipment and compares this calculated actual tension force with the preset target tension force value inside the furnace. Then, based on the comparison result, the control system adjusts the rotation speed of the tensioning machine rollers to adjust the strip tension force until the actual strip tension force is equal to the target tension force value inside the furnace. The tension control equipment in the air cushion furnace process section accurately detects the strip tension parameters through a detection mechanism. Combined with the calculation and analysis of these parameters by the control system, and based on this, the strip tension is adjusted by regulating the rotation speed of the tensioning rollers. This ensures that the strip tension matches the required tension value within the air cushion furnace, thereby guaranteeing the effective processing of the strip and improving the quality of the processed products. Furthermore, the entire detection, analysis, and control process can be performed in real-time as the equipment operates, without requiring furnace shutdown or preliminary rough adjustments based on preset tension values ​​before equipment operation. The matching adjustment enables real-time online control of strip tension in the air cushion furnace process section. It also allows for the selection of a first or second detection device to specifically measure strip tension parameters for strips with different material properties, improving the accuracy of strip tension detection and adjustment. This meets the corresponding working conditions of low-tension strips, avoiding significant tension fluctuations or even scrap rolls caused by low tension detection and adjustment accuracy. Ultimately, it enhances the air cushion furnace's adaptability and processing effect for strips of different materials, and improves the quality of the corresponding processed strip products.

[0028] In the tension control method of the air cushion furnace process section provided by the present invention, through the sequential operation steps of parameter detection, data processing and compensation adjustment, high-precision detection and precise and efficient adjustment of strip tension are achieved. This meets the corresponding working conditions of low-tension strip materials, avoids the phenomenon of large tension fluctuations or even scrap rolls caused by low tension detection and adjustment accuracy for low-tension strip materials, improves the adaptability and processing effect of the air cushion furnace to strip materials of different materials, and improves the quality of the corresponding strip processed products. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the assembly structure of the tension control device for the air cushion furnace process section provided in a specific embodiment of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the detection principle of the first detection device in the middle;

[0032] Figure 3 for Figure 1 Schematic diagram of the detection principle of the second detection device;

[0033] Figure 4 for Figure 1 The diagram shows the control principle of the tension control equipment in the air cushion furnace process section.

[0034] in,

[0035] 10-Strip;

[0036] 11-Tensioner roller assembly;

[0037] 12-Furnace front idler rollers;

[0038] 13-First detection device;

[0039] 141 - Lower tension roller;

[0040] 142 - Upper tension roller;

[0041] 143 - Tension gap;

[0042] 144-Tension meter;

[0043] 20 - Furnace body. Detailed Implementation

[0044] The core of this invention is to provide a tension control device for the process section of an air cushion furnace, which has high control accuracy for strip tension and can meet the tension control requirements under conditions of low tension. At the same time, it also provides a tension control method for the process section of an air cushion furnace that uses the air cushion furnace tension control device.

[0045] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Please refer to the reference. Figures 1 to 4 .

[0047] In a specific embodiment, the tension control device for the air cushion furnace process section provided by the present invention includes a tensioning roller group, a detection mechanism and a furnace front support roller arranged sequentially upstream of the furnace body of the air cushion furnace along the strip conveying direction. The tensioning roller group and the furnace front support roller are both in cooperation with the strip roller winding.

[0048] It also includes a control system that is communicatively connected to the tensioner roller group and the detection mechanism, and the control system can control the rotation speed of the tensioner roller group according to the strip tension parameters fed back by the detection mechanism;

[0049] The testing mechanism includes a first testing device and a second testing device. If the thickness of the strip is less than the set thickness, the tension parameter of the strip is obtained by the first testing device; if the thickness of the strip is greater than the set thickness, the tension parameter of the strip is obtained by the second testing device.

[0050] During operation, based on parameters such as the thickness and density of the strip, the system selects either a first or second detection device to detect the strip tension parameter. This measurement reflects the current tension state of the strip. The detection mechanism transmits the measured tension parameter back to the control system, which calculates the actual tension of the strip being processed. This calculated actual tension value is then compared with the preset target tension value in the furnace. Based on this comparison, the control system adjusts the rotational speed of the tensioning rollers to adjust the strip tension until it matches the target tension value.

[0051] The tension control equipment in the air cushion furnace process section accurately detects the strip tension parameters through a detection mechanism. Combined with the calculation and analysis of these parameters by the control system, and based on this, the strip tension is adjusted by regulating the rotation speed of the tensioning rollers. This ensures that the strip tension matches the required tension value within the air cushion furnace, thereby guaranteeing the effective processing of the strip and improving the quality of the processed products. Furthermore, the entire detection, analysis, and control process can be performed in real-time as the equipment operates, without requiring furnace shutdown or preliminary rough adjustments based on preset tension values ​​before equipment operation. The matching adjustment enables real-time online control of strip tension in the air cushion furnace process section. It also allows for the selection of a first or second detection device to specifically measure strip tension parameters for strips with different material properties, improving the accuracy of strip tension detection and adjustment. This meets the corresponding working conditions of low-tension strips, avoiding significant tension fluctuations or even scrap rolls caused by low tension detection and adjustment accuracy. Ultimately, it enhances the air cushion furnace's adaptability and processing effect for strips of different materials, and improves the quality of the corresponding processed strip products.

[0052] When the equipment is running, the strip is wound onto the tensioner roller group and the furnace front idler roller. The tensioner roller group drives the strip downstream until it is fed into the furnace body of the air cushion furnace. The furnace front idler roller is positioned upstream of the furnace body feed inlet to stably support the strip and ensure that it is fed into the furnace body smoothly and accurately.

[0053] In practical applications, the tensioner roller assembly can be a roller assembly structure consisting of four-axis rollers as shown in the figure, or a roller assembly structure consisting of three-axis or five-axis rollers. The operator can flexibly select and adjust according to the specific working conditions. In principle, as long as it can ensure stable conveying and reliable tensioning of the strip, it is acceptable.

[0054] Furthermore, the first detection device is a sag detection device arranged between the tensioner roller group and the furnace front idler roller along the strip conveying direction. The sag detection device is positioned above the midpoint of the strip located between the tensioner roller group and the furnace front idler roller, and the sag detection device is fitted with the strip with a clearance.

[0055] Accordingly, the tension parameter of the strip detected by the first detection device is the vertical sag distance 'a' of the strip located between the tensioner roller group and the furnace front idler roller.

[0056] The following is combined Figure 2 The specific working method of the first detection device is explained, especially its detection principle and parameter calculation and analysis logic.

[0057] The principle of tension sag control is to calculate the weight of the sag portion of the strip based on the sag position, the width, thickness, and density of the strip. That is, the weight of the sag portion of the strip is equal to the tension inside the furnace.

[0058] like Figure 2 In the diagram, T represents the furnace tension, G represents the weight of the sag strip, T1 and T2 represent the reaction forces of the strip tension, and T1 = T2 = T. L is the straight-line distance between the idler rollers before and after the sag detection, b = 0.5L, c is the distance from the lowest point of sag to the idler roller, and a is the sag length of the strip. θ is the angle between the sag strip and the vertical line at its midpoint.

[0059] pass Figure 2 The force analysis shown indicates that:

[0060] T1cosθ+T2cosθ=G①;

[0061] T1 = T2 = T②;

[0062] By rearranging equations ① and ②, we can obtain:

[0063] 2Tcosθ=G③;

[0064] T = G / 2cosθ④;

[0065] again,

[0066] cosθ=a / c⑤;

[0067] c 2 =a 2 +b 2 ⑥;

[0068] G=2ρWHc⑦;

[0069] Combining ① to ⑦, we can conclude that:

[0070] T = G / 2cosθ = ρWHc 2 / a=ρWH(a 2 +b 2 ) / a⑧;

[0071] Simplifying equation ⑧, we get:

[0072] ρWHa 2 -Ta+ρWHb 2 =0⑨;

[0073] but,

[0074] a = [T + sqr(T)] 2 -4ρ 2 W 2 H 2 b 2 )] / 2ρWH⑩;

[0075] or

[0076]

[0077] again,

[0078]

[0079] Will Substitute equation 10 and We can obtain:

[0080]

[0081] or

[0082]

[0083] In the above formulas, W is the strip width, H is the strip thickness, ρ is the strip density, and sqr is the square root.

[0084] Based on the above calculations, the tensile stress ρ of the strip is determined when sag control is achieved. 张 The relationship between the strip sag distance *a* and the actual sag distance *a* is given in the formulas, where all other parameters such as *ρ* and *b* are constants. The required sag distance *a* can be calculated from the set tensile stress using these formulas. Conversely, the real-time tensile stress *ρ* can be calculated from the real-time sag distance *a*. 张 .

[0085] In practical applications, an ultrasonic rangefinder is preferred for detecting sag. Compared to laser rangefinders, ultrasonic rangefinders have stronger anti-interference capabilities, ensuring stable and accurate measurement of parameters related to the sag distance of the strip.

[0086] Of course, staff can also choose laser rangefinders or other ranging devices as the specific application type of the verticality detection device based on actual working conditions and application requirements. In principle, any device that can ensure reliable operation and accurate detection data of the first detection device is acceptable.

[0087] On the other hand, the second detection device includes a lower measuring roll arranged between the tensioner roll group and the furnace front idler roll along the strip conveying direction, and a tension meter and a lifting mechanism cooperating with the lower measuring roll. The lower measuring roll is positioned below the midpoint of the strip located between the tensioner roll group and the furnace front idler roll.

[0088] The second testing device also includes two upper tension rollers arranged sequentially between the tensioner roller group and the furnace front support roller along the strip conveying direction. The upper tension rollers are located above the strip, and a tension gap is formed between the two upper tension rollers to align with the lower tension roller in the vertical direction. The lower tension roller can be vertically lifted and aligned into the tension gap under the drive of the lifting mechanism, so as to push the strip into the tension gap from bottom to top and tension it.

[0089] The tension parameter of the strip obtained by the second detection device is the measurement value of the tension meter.

[0090] The following is combined Figure 3 The specific working method of the second detection device is explained, especially its detection principle and parameter calculation and analysis logic.

[0091] like Figure 3 In the diagram, T represents the strip tension, and Tmeasured represents the vertical force measured by the tension gauge. a, b, and c represent the distances between the tension rollers.

[0092] pass Figure 3 The force analysis shown yields the following results:

[0093] T 测 =2Tcosθ⑴;

[0094] T = T 测 / 2cosθ⑵;

[0095] cosθ=a / c⑶;

[0096] Combining equations (1), (2), and (3) above, we can obtain:

[0097] T = cT 测 / 2a⑷;

[0098] again,

[0099] T = ρ 张 *WH⑸;

[0100] Substituting (5) into (4) above, we get:

[0101] ρ 张 *WH=cT 测 / 2a⑹;

[0102] Simplifying equation (6), we get:

[0103] ρ 张 =cT 测 / 2aWH⑺;

[0104] In equations (1) to (7) above, W is the strip width and H is the strip thickness.

[0105] Based on the calculations in equations (1) to (7) above, when using the second detection device to detect the strip tension parameters, the strip tension stress ρ is determined. 张 and tension gauge measured value T 测 The relationship between them is such that all other parameters, such as a and c, are constants.

[0106] Generally, in practical applications, tension gauges are piezomagnetic force sensors to ensure the sensitivity and accuracy of strip tension detection. However, other types of force sensors or force measuring devices can be selected as the specific type of tension gauge according to actual working conditions. In principle, any device that can accurately measure the strip tension parameter of the second detection device is acceptable.

[0107] In actual operation, if a second detection device is required to measure the strip, the lower tension roller must be raised by the lifting mechanism. During this process, the tension meter rises synchronously with the lower tension roller, and the measuring end of the tension meter is linked with the lower tension roller to ensure accurate measurement of the strip tension by the tension meter. After the measurement is completed, the tension meter and the lower tension roller are lowered synchronously to the initial position under the drive of the lifting mechanism to avoid interference or obstruction to the normal conveying of the strip.

[0108] Generally, the lifting mechanism can be a worm gear mechanism, or it can be a lead screw, robotic arm, or other mechanisms capable of reciprocating lifting. Workers can choose flexibly based on actual working conditions. In principle, any mechanism that can guarantee the efficiency and accuracy of the reciprocating lifting motion of the lower tension roller is acceptable.

[0109] Based on this, the first detection device is arranged vertically above the tension measurement gap. This avoids the upper tension measurement roller from obstructing or interfering with the detection path between the first detection device and the strip, thus ensuring that the first detection device can accurately and efficiently detect the tension parameters of the strip.

[0110] Furthermore, the first detection device should be positioned such that when the lower test roll is lifted to its highest point by the lifting mechanism, the first detection device will not come into contact with the lower test roll or cause structural interference, so as not to affect the detection accuracy and normal operation of the components.

[0111] Please refer to this carefully. Figure 4 .

[0112] The control system includes a human-machine interface module, a PLC controller, and a drive system that are interconnected; the PLC controller includes PID controllers that work in conjunction with the human-machine interface module and the drive system; the drive system includes a motor that drives the tensioner roller group and a drive frequency converter that controls the speed of the motor.

[0113] Generally, the human-machine interaction module can be a touch screen with a human-machine interface, so that staff can understand the relevant operating parameters and operating status of the equipment through the human-machine interaction module, and at the same time select and adjust the material condition and relevant working condition data of the strip through the human-machine interaction module.

[0114] Specifically, the human-machine interface is mainly used for receiving set values ​​and displaying actual values. It can set the target tension, the target speed of the machine train, the sag and tension control switching, strip specifications, etc., and can display the actual tension and actual sag.

[0115] The PLC controller mainly implements the function of tension stress control. It can switch the sag and tension control modes according to the actual situation, that is, select the first detection device or the second detection device to perform detection. At the same time, based on the previous analysis and calculation, the controller calculates the sag control value and actual value, tension control value and actual value according to the set tension stress, and adjusts the control parameters in conjunction with the PID controller.

[0116] The testing device includes a sag detection device and a tension detection device. The sag detection device uses an ultrasonic distance sensor to detect sag values ​​in real time with high accuracy for actual tension stress calculation. The tension detection device uses a piezomagnetic force sensor to measure pressure in the vertical direction.

[0117] In the drive system, the motor drive frequency converter receives the speed parameters set by the human-machine interface module, and simultaneously receives the adjustment speed output from the tension stress PID controller to dynamically adjust the tension stress. Based on the received speed signal, the motor drive frequency converter outputs a signal to control the tensioning machine roller motor, achieving real-time tension stress control.

[0118] It should be noted that in practical applications, when choosing between the first and second detection devices to measure the tension of the strip, for strips of the same material but different sizes, the thickness of the strip can be considered. Taking aluminum alloy strip as an example, generally, if the thickness of the aluminum alloy strip is greater than 4mm, it is less prone to sagging, or the sagging is insufficient to support the detection sensitivity of the sagging detection device. In this case, it is preferable to use the second detection device to detect the strip. If the thickness of the aluminum alloy strip is not greater than 4mm, it is more prone to sagging, so it is preferable to use the first detection device to detect the strip.

[0119] Of course, when selecting a testing device for strips of different materials, one should not be limited to the reference of strip thickness, but should also comprehensively consider parameters such as strip density and strip width, and should pay particular attention to whether the strip is prone to sagging. If the strip is prone to sagging, the first testing device is preferred for testing the strip; if the strip is not prone to sagging, the second testing device is preferred for testing the strip.

[0120] In a specific embodiment, the tension control method for the air cushion furnace process section provided in one embodiment of the present invention employs the tension control equipment for the air cushion furnace process section as described above, including:

[0121] S101, parameter detection;

[0122] The testing agency tests the strip located between the tensioner roller group and the furnace front idler roller to obtain the tension parameter of the strip, and transmits the tension parameter to the control system. If the strip thickness is less than the set thickness, the first testing device detects the tension parameter of the strip; if the strip thickness is greater than the set thickness, the second testing device detects the tension parameter of the strip.

[0123] More specifically, in the above-mentioned S101 parameter detection step, if the tension parameter of the strip is detected and fed back by the first detection device, the tension parameter is the vertical sag distance of the strip located between the tensioner roller group and the furnace front idler roller; if the tension parameter of the strip is detected and fed back by the second detection device, the tension parameter is the measured value of the tension meter.

[0124] S102, Data Processing;

[0125] The control system calculates the actual tension of the strip being processed by the equipment based on the received tension parameters, and compares the actual tension with the preset target tension value in the furnace.

[0126] S103, Compensation Adjustment;

[0127] The control system adjusts the rotational speed of the tensioner rollers based on the comparison between the actual tension value and the target tension value in the furnace, thereby adjusting the tension of the strip until the actual tension value of the strip is equal to the target tension value in the furnace.

[0128] In summary, the tension control equipment for the air cushion furnace process section provided in this invention, during its operation, selects either a first or second detection device to detect the tension parameter of the strip based on parameters such as the thickness and density of the strip. This measurement reflects the current tension state of the strip, and the detection mechanism transmits the measured tension parameter back to the control system. The control system then calculates the actual tension value of the strip being processed and compares this calculated value with the preset target tension value within the furnace. Based on this comparison, the control system adjusts the rotational speed of the tensioning rollers to adjust the strip tension until it equals the target tension value within the furnace. The tension control equipment in the air cushion furnace process section accurately detects the strip tension parameters through a detection mechanism. Combined with the calculation and analysis of these parameters by the control system, and based on this, the strip tension is adjusted by regulating the rotation speed of the tensioning rollers. This ensures that the strip tension matches the required tension value within the air cushion furnace, thereby guaranteeing the effective processing of the strip and improving the quality of the processed products. Furthermore, the entire detection, analysis, and control process can be performed in real-time as the equipment operates, without requiring furnace shutdown or preliminary rough adjustments based on preset tension values ​​before equipment operation. The matching adjustment enables real-time online control of strip tension in the air cushion furnace process section. It also allows for the selection of a first or second detection device to specifically measure strip tension parameters for strips with different material properties, improving the accuracy of strip tension detection and adjustment. This meets the corresponding working conditions of low-tension strips, avoiding significant tension fluctuations or even scrap rolls caused by low tension detection and adjustment accuracy. Ultimately, it enhances the air cushion furnace's adaptability and processing effect for strips of different materials, and improves the quality of the corresponding processed strip products.

[0129] Furthermore, the tension control method for the air cushion furnace process section provided by this invention, which employs the tension control equipment of the air cushion furnace process section, achieves high-precision detection and precise and efficient adjustment of strip tension through sequential parameter detection, data processing, and compensation adjustment. This meets the corresponding working conditions of low-tension strip materials, avoids phenomena such as large tension fluctuations or even scrap rolls caused by low tension detection and adjustment accuracy for low-tension strip materials, improves the adaptability and processing effect of the air cushion furnace to strip materials of different materials, and improves the quality of corresponding strip processed products.

[0130] The foregoing has provided a detailed description of the tension control device for the air cushion furnace process section and the tension control method for the air cushion furnace process section using the same device. Specific examples have been used to illustrate the principles and implementation methods of the invention. These examples are merely illustrative to aid in understanding the method and core concepts of the invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

Claims

1. A tension control device for a gas cushion furnace process section, characterized in that, The system includes a tensioning roller assembly, a detection mechanism, and a furnace front support roller arranged sequentially upstream of the gas cushion furnace along the strip conveying direction. Both the tensioning roller assembly and the furnace front support roller are engaged with the strip rolls. It also includes a control system that is communicatively connected to the tensioner roller group and the detection mechanism, respectively. The control system can control the rotation speed of the tensioner roller group according to the strip tension parameters fed back by the detection mechanism. The detection mechanism includes a first detection device and a second detection device. If the thickness of the strip is less than the set thickness, the tension parameter of the strip is detected by the first detection device; if the thickness of the strip is greater than the set thickness, the tension parameter of the strip is detected by the second detection device. The first detection device is a sag detection device arranged along the strip conveying direction between the tensioner roller group and the furnace front idler roller. The sag detection device is positioned above the midpoint of the strip between the tensioner roller group and the furnace front idler roller, and the sag detection device is clearance-fitted with the strip. The tension parameter of the strip detected by the first detection device is the vertical sag distance of the strip located between the tensioning roller group and the furnace front idler roller; The second detection device includes a lower measuring roller arranged along the strip conveying direction between the tensioner roller group and the furnace front idler roller, and a tension meter and a lifting mechanism cooperating with the lower measuring roller. The lower measuring roller is positioned below the midpoint of the strip located between the tensioner roller group and the furnace front idler roller. The second detection device also includes two upper tension rollers arranged sequentially between the tensioner roller group and the furnace front support roller along the strip conveying direction. The upper tension rollers are located above the strip, and a tension measurement gap is formed between the two upper tension rollers to align with the lower tension roller in the vertical direction. The lower tension roller can be vertically lifted and aligned into the tension measurement gap under the drive of the lifting mechanism, so as to push the strip into the tension measurement gap from bottom to top and tension it. The tension parameter of the strip detected by the second detection device is the measured value of the tension meter.

2. The tension control equipment for the air cushion furnace process section as described in claim 1, characterized in that, The sag detection device is an ultrasonic rangefinder.

3. The tension control equipment for the air cushion furnace process section as described in claim 1, characterized in that, The tension meter is a piezomagnetic force sensor.

4. The tension control equipment for the air cushion furnace process section as described in claim 1, characterized in that, The lifting mechanism is a worm gear mechanism.

5. The tension control device for the air cushion furnace process section as described in claim 1, characterized in that, The first detection device is arranged vertically above the tension gap.

6. The tension control device for the air cushion furnace process section as described in claim 1, characterized in that, The control system includes a human-machine interface module, a PLC controller, and a drive system that are interconnected. The PLC controller includes PID controllers that cooperate with the human-machine interface module and the drive system respectively; The drive system includes a motor that drives the tensioner roller assembly and a drive frequency converter that controls the speed of the motor.

7. A method for tension control in a gas cushion furnace process section, comprising the gas cushion furnace process section tension control equipment as described in any one of claims 1 to 6, characterized in that, Including the following steps: The parameter detection involves a detection mechanism that detects the strip material located between the tensioner roller group and the furnace front idler roller to obtain the strip tension parameter, which is then transmitted and fed back to the control system. Specifically, if the strip thickness is less than the set thickness, the first detection device detects the strip tension parameter; if the strip thickness is greater than the set thickness, the second detection device detects the strip tension parameter. Data processing and control system calculates the actual tension of the strip being processed by the equipment based on the received tension parameters, and compares the actual tension with the preset target tension value in the furnace. The compensation adjustment system adjusts the rotational speed of the tensioner rollers based on the comparison between the actual tension value and the target tension value in the furnace, thereby adjusting the tension of the strip until the actual tension value of the strip is equal to the target tension value in the furnace.

8. The tension control method for the air cushion furnace process section as described in claim 7, characterized in that, In the parameter detection step, if the tension parameter of the strip is detected and fed back by the first detection device, the tension parameter is the vertical sag distance of the strip located between the tensioning roller group and the furnace front idler roller; if the tension parameter of the strip is detected and fed back by the second detection device, the tension parameter is the measured value of the tension meter.

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