Device and method for double constant voltage conduction and insulation tension control for rolling of very thin strip

Abstract

This invention discloses a device and method for controlling double-sided constant-voltage conductivity and insulation tension in ultra-thin strip rolling, relating to the technical field of precision rolling equipment for ultra-thin metal strips. The device includes an unwinding unit, an inlet guiding unit, a double-sided constant-voltage conductivity unit, a rolling deformation unit, an insulation tension detection unit, a winding and centering unit, and a winding unit. The upper and lower conductive rollers of the double-sided constant-voltage conductivity unit serve as equipotential conductive clamping ends, forming a pulse current path along the length of the ultra-thin strip with spaced-apart loop conductive components. The insulation tension detection unit uses a fiber optic grating sensor to achieve anti-interference tension detection. The winding and centering unit achieves dynamic correction through a non-contact edge detection sensor and an axial fine-tuning mechanism. This invention can improve the conductivity stability, tension detection accuracy, and winding quality during the pulse current-assisted rolling process of ultra-thin strips.

Description

Technical Field

[0001] This invention relates to the field of precision rolling equipment for ultra-thin metal strips, and in particular to a device and method for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling. Background Technology

[0002] Ultra-thin metal strips are widely used in electronic devices, precision elastic elements, miniature formed parts, new energy components, and aerospace thin-walled components. With the development of lightweight, miniaturized, and high-performance products, the requirements for thickness accuracy, shape quality, surface quality, and microstructure uniformity of ultra-thin strips are constantly increasing. For ultra-thin metal strips with a thickness of less than 0.10 mm or even less than 0.05 mm, their low bending stiffness, large width-to-thickness ratio, and extreme sensitivity to tension and lateral position changes make them prone to problems such as deviation, edge waviness, wrinkles, strip breakage, misalignment during winding, and surface damage during rolling.

[0003] Pulsed current assisted rolling, by introducing pulsed current during the plastic deformation of metals, can utilize the Joule heating effect, electroplastic effect, and the influence of current on defect structure and microstructure evolution to reduce the material's deformation resistance and improve rolling stability. This technology has high application value for ultra-thin strips of high-strength stainless steel, nickel-based alloys, and other difficult-to-deform alloys.

[0004] However, traditional conductivity and tension control methods are insufficient for pulsed current-assisted ultra-thin strip rolling. First, the contact area between the single-sided conductive roller or brush and the ultra-thin strip is limited. Fluctuations in contact resistance due to strip vibration, tension fluctuations, or changes in surface roughness can lead to uneven current input and, in severe cases, localized arcing. Second, if the upper and lower conductive components act as electrodes of opposite polarities directly contacting the same local strip area, the pulsed current may short-circuit in that area, making it difficult to stably pass through the rolling deformation zone or its vicinity along the strip length, thus affecting the electric-assisted rolling effect. Third, the pulsed current may form a leakage loop through the guide roller, bearing housing, fastening bolts, support frame, tension detection components, and the mill frame, reducing current utilization and affecting equipment safety. Finally, traditional resistance strain gauge tension detection devices are susceptible to electromagnetic interference under pulsed current conditions, making it difficult to stably obtain low tension signals from ultra-thin strips. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for controlling the double-sided constant voltage conductive and insulating tension in ultra-thin strip rolling, so as to solve the problems of unstable conductive contact, uncontrollable contact pressure, current leakage, interference with tension signal and winding misalignment in the existing ultra-thin strip electrically assisted rolling process.

[0006] To achieve the above objectives, the present invention provides a device for controlling double-sided constant-pressure conductive and insulating tension in ultra-thin strip rolling, comprising an unwinding unit, an inlet guiding unit, a double-sided constant-pressure conductive unit, a rolling deformation unit, an insulating tension detection unit, a winding and centering unit, and a winding unit arranged sequentially along the running direction of the ultra-thin strip. The double-sided constant-pressure conductive unit is electrically connected to a pulse power supply. The double-sided constant-pressure conductive unit includes an upper conductive roller, a lower conductive roller, a floating support mechanism, a constant-pressure adjustment mechanism, an insulating mounting base, a conductive connection assembly, and a pressure feedback component. The lower conductive roller and the floating support mechanism are both mounted on the insulating mounting base. The upper conductive roller is mounted on the floating support mechanism via the constant-pressure adjustment mechanism. The upper and lower conductive rollers are located on the upper and lower sides of the ultra-thin strip, respectively, for forming a double-sided clamping conductive contact with the ultra-thin strip. The electrical connection assembly is configured such that the upper conductive roller and the lower conductive roller are connected as equipotential conductive clamping ends to one pole of the pulse power supply, and the other pole of the pulse power supply is connected to a loop conductor spaced apart from the double-sided constant voltage conductive unit along the running direction of the ultra-thin strip, so that the pulse current flows along the length direction of the ultra-thin strip through the strip section between the double-sided constant voltage conductive unit and the loop conductor; the insulation tension detection unit includes an insulation tension roller and a fiber optic grating sensor for detecting the running tension of the ultra-thin strip under electrically insulating conditions; the take-up centering unit includes a non-contact edge detection sensor, a controller, and an axial fine-tuning mechanism, wherein the controller controls the axial fine-tuning mechanism to adjust the axial position of the take-up unit according to the edge position or centerline offset of the ultra-thin strip detected by the non-contact edge detection sensor.

[0007] Preferably, the circuit conductive element is electrically isolated from the frame by an insulating support and is spaced apart from the double-sided constant voltage conductive unit along the ultra-thin strip running direction, such that the strip section between them includes at least the rolling deformation zone or a section adjacent to the rolling deformation zone; the circuit conductive element is one of the conductive rolls in the rolling deformation unit, a conductive roll group disposed on the inlet or outlet side of the rolling deformation unit, a second double-sided constant voltage conductive unit, a conductive clamping block, or a conductive sliding contact; when the circuit conductive element is a second double-sided constant voltage conductive unit, the structure of the circuit conductive element is the same as that of the double-sided constant voltage conductive unit, and it is disposed on the outlet side of the rolling deformation unit, and the two are respectively connected to the two poles of the pulse power supply, so that the pulse current passes through the rolling deformation zone along the length direction of the ultra-thin strip.

[0008] Preferably, the insulating mounting base includes a support frame and a conductive roller bearing seat located above the support frame. The support frame is mounted on the machine frame by fastening bolts. A first insulating layer is provided between the conductive roller bearing seat and the support frame, and a second insulating layer is provided between the support frame and the machine frame. An insulating sleeve is provided on the outer periphery of the fastening bolt, and the upper and lower ends of the insulating sleeve are in contact with the first insulating layer and the second insulating layer, respectively. An upper insulating washer and a lower insulating washer are also provided between the bolt head of the fastening bolt and the first insulating layer, and between the nut end and the second insulating layer, respectively.

[0009] Preferably, the floating support mechanism includes a guide post mounted on the insulating mounting base, a guide slider and a guide sleeve slidably sleeved on the guide post, and a swing arm bracket for mounting the guide sleeve. The floating support mechanism is used to enable the upper conductive roller to float slightly in a direction perpendicular to the surface of the ultra-thin strip. The constant pressure adjustment mechanism includes a lead screw preload mounted on the swing arm bracket, an elastic preload mounted on the lead screw preload, and a linear drive component. The linear drive component is a motor drive component, a handwheel, or an adjustment handle.

[0010] Preferably, both the upper conductive roller and the lower conductive roller have a conductive wear-resistant layer on their outer surfaces. The conductive wear-resistant layer is a copper alloy layer, a silver plating layer, a graphite copper composite layer, a carbon-based conductive layer, or a conductive ceramic composite layer.

[0011] Preferably, the insulation tension detection unit further includes an insulation bearing seat, the insulation tension roller is mounted on the insulation bearing seat, the insulation tension roller includes a first insulation tension roller, a second insulation tension roller and a third insulation tension roller, the ultra-thin strip passes around the first insulation tension roller, the second insulation tension roller and the third insulation tension roller in an S-shaped path; the insulation tension detection unit further includes a temperature compensation grating, the fiber optic grating sensor includes a measuring grating, and the controller calculates the tension based on the wavelength change difference between the measuring grating and the temperature compensation grating.

[0012] Preferably, the non-contact edge detection sensor is a laser edge sensor, a CCD vision sensor, a photoelectric edge sensor, or a line scan camera. The non-contact edge detection sensor is disposed on one or both sides of the ultra-thin strip and is used to obtain the edge coordinates, width center line, or lateral offset of the ultra-thin strip.

[0013] Preferably, the controller can simultaneously acquire the pressure feedback device, the fiber optic grating sensor, the non-contact edge detection sensor, the rolling force signal, the rolling speed signal, and the current, voltage, or frequency parameters of the pulse power supply, and perform coordinated control on the constant pressure adjustment mechanism, the unwinding drive, the winding drive, the axial fine-tuning mechanism, and the pulse power supply; when performing axial correction, the controller simultaneously monitors the tension signal of the insulation tension detection unit, and limits the adjustment speed of the axial fine-tuning mechanism according to the tension fluctuation, so as to avoid sudden changes in the tension of the ultra-thin strip caused by the correction action.

[0014] Preferably, the controller calculates the equivalent resistance or contact state index of the conductive circuit based on the output voltage and output current of the pulse power supply. When the equivalent resistance or contact state index exceeds a preset range, the controller reduces the pulse current output, reduces the rolling speed, or issues a stop command. Specifically, the controller calculates the real-time equivalent resistance R of the conductive circuit according to the formula R=U / I, or calculates the contact state index R / R0, where R0 is the initial stable equivalent resistance. When R / R0 is greater than a first threshold, the controller reduces the pulse current output. When R / R0 is greater than a second threshold, the controller reduces the rolling speed or issues a stop command.

[0015] This invention also provides a method for controlling double-sided constant-pressure conductive and insulating tension in ultra-thin strip rolling based on the above-mentioned device, comprising the following steps: S1, passing the ultra-thin strip sequentially through an unwinding unit, an inlet guiding unit, a double-sided constant-pressure conductive unit, a rolling deformation unit, an insulating tension detection unit, a winding and centering unit, and a winding unit; S2, adjusting the clamping pressure of the upper and lower conductive rollers on the ultra-thin strip through a constant-pressure adjusting mechanism, and obtaining the conductive contact pressure through a pressure feedback device; S3, connecting the upper and lower conductive rollers as equipotential conductive clamping ends to one pole of a pulse power supply, and connecting the other pole of the pulse power supply to a loop conductive element spaced apart from the double-sided constant-pressure conductive unit along the running direction of the ultra-thin strip, so that the pulse current flows through the double-sided constant-pressure conductive unit along the length direction of the ultra-thin strip. S4. The ultra-thin strip is rolled into the rolling deformation unit for thinning, and the strip tension is detected by the insulation tension detection unit; S5. The lateral offset of the ultra-thin strip is detected by the non-contact edge detection sensor, and the axial position of the winding unit is adjusted by the axial fine adjustment mechanism; S6. The clamping pressure of the upper conductive roller is adjusted in a closed loop according to the pressure feedback signal, and the upper limit of the clamping pressure is limited to avoid damaging the surface of the ultra-thin strip; S7. The speed difference between the unwinding unit and the winding unit is adjusted according to the fiber optic grating sensor signal to maintain constant tension; S8. The equivalent resistance R or R / R0 is calculated according to the voltage and current of the pulse power supply, and the pulse current is reduced when R / R0 is greater than the first threshold, and the rolling speed is reduced or the machine is stopped when it is greater than the second threshold.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: This invention employs a double-sided clamping conductive structure with upper and lower conductive rollers, which increases the conductive contact area, reduces contact resistance fluctuations, and improves the uniformity of pulse current input. The upper and lower conductive rollers serve as equipotential conductive clamping ends, forming a length-direction current path with the loop conductive components spaced apart along the strip's running direction, preventing direct short circuits in the same local area between the upper and lower conductive rollers. A closed-loop conductive pressure control system, consisting of a floating support mechanism, a constant pressure adjustment mechanism, and a pressure feedback component, maintains stable conductive contact even under conditions of extreme thin strip thickness fluctuations or running vibrations. A multi-level insulation structure further enhances the conductive... The electric rollers and circuit conductive components are insulated from the frame, which can prevent current leakage to the frame, bearing housing, or winding system. Tension detection is performed using insulated tension rollers and fiber optic grating sensors, and the signal transmission is not easily affected by pulse current and electromagnetic interference, making it suitable for ultra-thin strip with low tension. Dynamic winding alignment is achieved through non-contact edge detection and axial fine adjustment mechanism, which can reduce winding misalignment, end face unevenness, and serpentine deviation in ultra-thin strips. Furthermore, conductive pressure, tension, offset, rolling state, and current parameters can be integrated into the same control system, which has strong integration, reliability, and engineering adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention.

[0019] Figure 2 This is a schematic diagram of the double-sided constant voltage conductive unit structure of the present invention.

[0020] Figure 3 This is a schematic cross-sectional view of the insulating mounting base of the present invention.

[0021] Figure 4 This is a schematic diagram of the insulation tension detection unit of the present invention.

[0022] Figure 5 This is a schematic diagram of the winding and centering unit structure of the present invention.

[0023] Figure 6 This is a block diagram of the control system of the present invention.

[0024] Figure 7 This is a schematic diagram of the current loop arrangement of the present invention.

[0025] In the diagram: 1. Unwinding unit; 2. Inlet guide unit; 3. Double-sided constant voltage conductive unit; 4. Rolling deformation unit; 5. Insulation tension detection unit; 6. Rewinding and centering unit; 7. Rewinding unit; 8. Pulse power supply; 9. Ultra-thin strip; 10. Frame; 11. Insulating sleeve; 31. Upper conductive roller; 32. Lower conductive roller; 33. Floating support mechanism; 331. Guide column; 332. Guide slider; 333. Guide sleeve; 334. Swing arm bracket; 34. Constant voltage adjustment mechanism; 341. Screw pretensioner; 342. Elastic pretensioner Components; 343, Linear drive component; 35, Insulated mounting base; 351, Support frame; 352, Conductive roller bearing seat; 353, First insulating layer; 354, Second insulating layer; 355, Fastening bolt; 36, Conductive connection assembly; 37, Pressure feedback component; 38, Conductive wear-resistant layer; 51, First insulating tension roller; 52, Second insulating tension roller; 53, Third insulating tension roller; 54, Fiber optic grating sensor; 55, Insulated bearing seat; 61, Non-contact edge detection sensor; 62, Controller; 63, Axial fine-tuning mechanism. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 7As shown, this invention provides a device for controlling double-sided constant-pressure conductive and insulating tension in ultra-thin strip rolling. It includes an unwinding unit 1, an inlet guiding unit 2, a double-sided constant-pressure conductive unit 3, a rolling deformation unit 4, an insulating tension detection unit 5, a winding and centering unit 6, and a winding unit 7 arranged sequentially along the running direction of the ultra-thin strip 9. The double-sided constant-pressure conductive unit 3 is electrically connected to a pulse power supply 8. The double-sided constant-pressure conductive unit 3 includes an upper conductive roller 31, a lower conductive roller 32, a floating support mechanism 33, a constant-pressure adjustment mechanism 34, an insulating mounting base 35, a conductive connection assembly 36, and a pressure feedback component 37. The lower conductive roller 32 and the floating support mechanism 33 are both mounted on the insulating mounting base 35. The upper conductive roller 31 is mounted on the floating support mechanism 33 via the constant-pressure adjustment mechanism 34. The upper conductive roller 31 and the lower conductive roller 32 are located on the upper and lower sides of the ultra-thin strip 9, respectively, to form a double-sided clamp on the ultra-thin strip 9. The conductive contact assembly 36 is configured such that the upper conductive roller 31 and the lower conductive roller 32 are connected to one pole of the pulse power supply 8 as equipotential conductive clamping ends, and the other pole of the pulse power supply 8 is connected to a loop conductive element spaced apart from the double-sided constant voltage conductive unit 3 along the running direction of the ultra-thin strip 9, so that the pulse current flows through the strip section between the double-sided constant voltage conductive unit 3 and the loop conductive element along the length direction of the ultra-thin strip 9; the insulation tension detection unit 5 includes an insulation tension roller and a fiber optic grating sensor 54, used to detect the running tension of the ultra-thin strip 9 under electrically insulating conditions; the winding and centering unit 6 includes a non-contact edge detection sensor 61, a controller 62 and an axial fine-tuning mechanism 63, the controller 62 is used to control the axial fine-tuning mechanism 63 to adjust the axial position of the winding unit 7 according to the edge position or centerline offset of the ultra-thin strip 9 detected by the non-contact edge detection sensor 61.

[0028] The constant pressure in the device for controlling the double-sided constant pressure conductivity and insulation tension for ultra-thin strip rolling provided by this invention refers to constant contact pressure and constant clamping pressure. By sequentially arranging the unwinding unit 1, inlet guide unit 2, double-sided constant pressure conductivity unit 3, rolling deformation unit 4, insulation tension detection unit 5, winding centering unit 6, and winding unit 7 along the running direction of the ultra-thin strip 9, stable unwinding, conductivity, rolling, tension detection, and winding operations of the ultra-thin strip 9 during continuous rolling can be achieved. The double-sided clamping conductive contact structure composed of the upper conductive roller 31 and the lower conductive roller 32 can increase the conductive contact area and reduce contact resistance fluctuations caused by vibration or surface roughness changes of the ultra-thin strip 9, thereby improving the uniformity and stability of the pulse current input. By connecting the upper conductive roller 31 and the lower conductive roller 32 as equipotential conductive clamping ends to one pole of the pulse power supply 8, and connecting the other pole to the spaced-apart loop conductors, the pulse current can be forced to flow along the length of the ultra-thin strip 9. This avoids short circuits in local areas between the upper and lower conductive rollers, ensuring that the pulse current can effectively act on the rolling deformation zone or its adjacent area, thus better utilizing the electric-assisted rolling effect. By setting up the insulation tension detection unit 5, the small tension signal of the ultra-thin strip 9 can be stably detected while electrically isolated from the pulse current loop. Through the winding and centering unit 6, the axial position of the winding unit 7 can be dynamically adjusted according to the actual deviation of the ultra-thin strip 9.

[0029] In a further optimized scheme, the circuit conductive component is electrically isolated from the frame 10 through an insulating support component, and is arranged at intervals with the double-sided constant voltage conductive unit 3 along the running direction of the ultra-thin strip 9, so that the strip section between the two includes at least the rolling deformation zone or the section adjacent to the rolling deformation zone; the circuit conductive component is one of the following: conductive roll in the rolling deformation unit 4, conductive roll group set on the inlet side or outlet side of the rolling deformation unit 4, second double-sided constant voltage conductive unit, conductive clamping block or conductive sliding contact; when the circuit conductive component is the second double-sided constant voltage conductive unit, the structure of the circuit conductive component is the same as that of the double-sided constant voltage conductive unit 3, and it is set on the outlet side of the rolling deformation unit 4. The two are respectively connected to the two poles of the pulse power supply 8, so that the pulse current passes through the rolling deformation zone along the length direction of the ultra-thin strip 9.

[0030] By setting the circuit conductive component as one of the following: conductive roll in rolling deformation unit 4, conductive roll group set on the inlet or outlet side of rolling deformation unit 4, second double-sided constant voltage conductive unit, conductive clamping block or conductive sliding contact, the most suitable current circuit configuration can be flexibly selected according to the specific structure, spatial layout and process requirements of the rolling mill equipment. This can simplify the equipment structure (such as using conductive roll as circuit conductive component) and obtain a better current action path (such as setting a dedicated second double-sided constant voltage conductive unit), thereby improving the adaptability of the device to different types of rolling production lines.

[0031] In a further optimized design, the insulating mounting base 35 includes a support frame 351 and a conductive roller bearing seat 352 located above the support frame 351. The support frame 351 is mounted on the frame 10 by fastening bolts 355. A first insulating layer 353 is provided between the conductive roller bearing seat 352 and the support frame 351, and a second insulating layer 354 is provided between the support frame 351 and the frame 10. An insulating isolation sleeve 11 is provided on the outer periphery of the fastening bolt 355, and the upper and lower ends of the insulating isolation sleeve 11 are in contact with the first insulating layer 353 and the second insulating layer 354, respectively. An upper insulating washer and a lower insulating washer are also provided between the bolt head of the fastening bolt 355 and the first insulating layer 353, and between the nut end and the second insulating layer 354, respectively.

[0032] By incorporating a first insulating layer 353, a second insulating layer 354, and an insulating sleeve 11 within the insulating mounting base 35, a multi-level, all-around insulating barrier is formed from the conductive roller to the frame 10. The first insulating layer 353 blocks the transmission of current from the conductive roller bearing housing 352 to the support frame 351, the second insulating layer 354 blocks the transmission of current from the support frame 351 to the frame 10, and the insulating sleeve 11 prevents leakage of current through the metal connector, the fastening bolt 355. The upper and lower insulating washers prevent the bolt head / nut from forming a leakage path through the fastening bolt 355. This multi-level insulation structure significantly reduces the leakage of pulse current to the equipment frame 10 and the ground wire, improves current utilization efficiency, and protects non-electrical components such as bearings and gears from electrolytic corrosion damage.

[0033] Further optimizing the scheme, the floating support mechanism 33 includes a guide column 331 mounted on the insulating mounting base 35, a guide slider 332 and a guide sleeve 333 slidably sleeved on the guide column 331, and a swing arm bracket 334 for mounting the guide sleeve 333. The floating support mechanism 33 is used to enable the upper conductive roller 31 to float slightly in a direction perpendicular to the surface of the ultra-thin strip 9. The constant pressure adjustment mechanism 34 includes a screw preload 341 mounted on the swing arm bracket 334, an elastic preload 342 set on the screw preload 341, and a linear drive 343. The linear drive 343 is a motor drive, a handwheel, or an adjustment handle.

[0034] By using the floating support mechanism 33, the upper conductive roller 31 can float slightly in a direction perpendicular to the surface of the ultra-thin strip 9. This ensures that even with minor fluctuations in the thickness of the ultra-thin strip 9 or during operation, the upper conductive roller 31 can still adaptively maintain good contact with the surface of the ultra-thin strip 9, avoiding sudden pressure changes or poor contact caused by rigid contact. The constant pressure adjustment mechanism 34, including a lead screw preload 341, an elastic preload 342, and / or a linear drive 343, can provide a precise, adjustable, and stable clamping pressure according to process requirements. The lead screw preload 341 provides coarse adjustment, the elastic preload 342 provides flexible buffering and continuous pressure maintenance, and the linear drive 343 enables real-time dynamic adjustment of the pressure, collectively ensuring that the conductive contact pressure remains within the allowable range. The clamping pressure adjusted by the constant pressure adjustment mechanism 34 is adjustable, with its upper limit set to a unit width clamping force range that does not cause indentations or localized plastic deformation on the surface of the ultra-thin strip 9, preferably 0.1-5 N / mm.

[0035] In a further optimized design, a conductive and wear-resistant layer 38 is provided on the outer surface of both the upper conductive roller 31 and the lower conductive roller 32. The conductive and wear-resistant layer 38 can be a copper alloy layer, a silver plating layer, a graphite copper composite layer, a carbon-based conductive layer, or a conductive ceramic composite layer. For high conductivity requirements, a copper alloy or silver plating layer is preferred. For wear resistance and ablation resistance requirements, a graphite copper composite layer or a conductive ceramic composite layer is preferred.

[0036] By providing a conductive wear-resistant layer 38 on the outer surface of the upper conductive roller 31 and / or the lower conductive roller 32, the contact resistance between the conductive roller and the ultra-thin strip 9 can be significantly reduced, and the wear resistance and arc erosion resistance of the conductive roller surface can be improved. Copper alloy and silver plating provide excellent conductivity, graphite copper composite layer and carbon-based conductive layer combine conductivity and lubricity, and conductive ceramic composite layer has extremely high hardness and high temperature resistance. These material selections can be optimized according to the material and rolling process of different ultra-thin strips 9 to extend the service life of the conductive roller and ensure long-term stable conductivity.

[0037] Further optimizing the scheme, the insulation tension detection unit 5 also includes an insulation bearing seat 55, on which an insulation tension roller is mounted. The insulation tension roller includes a first insulation tension roller 51, a second insulation tension roller 52, and a third insulation tension roller 53. The ultra-thin belt 9 passes around the first insulation tension roller 51, the second insulation tension roller 52, and the third insulation tension roller 53 in an S-shaped path. The insulation tension detection unit 5 also includes a temperature compensation grating 56, and the fiber optic grating sensor 54 includes a measuring grating. The controller 62 calculates the tension based on the wavelength change difference between the measuring grating and the temperature compensation grating 56.

[0038] By setting up the insulation tension detection unit 5, and having the ultra-thin strip 9 wrap around the first insulation tension roller 51, the second insulation tension roller 52, and the third insulation tension roller 53 in an S-shaped path, the wrap angle and contact length between the ultra-thin strip 9 and the tension rollers can be increased, effectively converting the strip tension into a concentrated force or bending moment acting on the tension roller support structure. The S-shaped wrapping method amplifies the effect of tension on the intermediate roller (the second insulation tension roller 52), making the tension detection more sensitive. At the same time, all tension rollers are electrically isolated from the frame 10 through the insulating bearing seat 55, further ensuring the high-voltage insulation performance of the detection unit and preventing pulse current interference.

[0039] Further optimization of the scheme: the non-contact edge detection sensor 61 is a laser edge sensor, CCD vision sensor, photoelectric edge sensor or line scan camera. The non-contact edge detection sensor 61 is set on one or both sides of the ultra-thin strip 9 to obtain the edge coordinates, width center line or lateral offset of the ultra-thin strip 9.

[0040] The non-contact method avoids physical contact between the sensor and the ultra-thin strip 9, preventing scratches or indentations on the surface of the ultra-thin strip 9, making it particularly suitable for ultra-thin strip products with extremely high surface quality requirements. The laser and CCD vision sensors have high resolution and high response speed, enabling them to accurately capture minute deviations of the ultra-thin strip 9 during high-speed operation, providing a reliable data foundation for subsequent precise correction control.

[0041] Further optimizing the scheme, the controller 62 can simultaneously collect the pressure feedback component 37, fiber optic grating sensor 54, non-contact edge detection sensor 61, rolling force signal, rolling speed signal, and current, voltage, or frequency parameters of the pulse power supply 8, and perform coordinated control on the constant pressure adjustment mechanism 34, unwinding drive, winding drive, axial fine adjustment mechanism 63, and pulse power supply 8; when performing axial correction, the controller 62 simultaneously monitors the tension signal of the insulation tension detection unit 5, and limits the adjustment speed of the axial fine adjustment mechanism 63 according to the tension fluctuation, so as to avoid sudden tension changes in the ultra-thin strip 9 caused by the correction action.

[0042] The controller 62 enables intelligent integrated control of the entire ultra-thin strip rolling system. Instead of controlling each component in isolation, the controller 62 comprehensively judges and adjusts the conductive contact pressure, strip tension, winding alignment status, rolling process parameters, and electrical parameters as a coupled whole. This allows for automatic matching of the optimal control strategy under different rolling stages and conditions, significantly improving the system's automation level and process stability.

[0043] To further optimize the scheme, the controller 62 calculates the equivalent resistance or contact state index of the conductive circuit based on the output voltage and output current of the pulse power supply 8. When the equivalent resistance or contact state index exceeds the preset range, the controller 62 reduces the pulse current output, reduces the rolling speed, or issues a stop command. Specifically, the controller 62 calculates the real-time equivalent resistance R of the conductive circuit according to the formula R=U / I, or calculates the contact state index R / R0, where R0 is the initial stable equivalent resistance. When R / R0 is greater than the first threshold, the controller 62 reduces the pulse current output. When R / R0 is greater than the second threshold, the controller 62 reduces the rolling speed or issues a stop command.

[0044] The controller 62 calculates the equivalent resistance or contact status index of the conductive circuit based on the output voltage and current of the pulse power supply 8. When the equivalent resistance or contact status index exceeds the preset range, it executes protective actions such as reducing the pulse current output, reducing the rolling speed, or issuing a shutdown command, thus enabling real-time monitoring of the conductive circuit's health status. An abnormally high equivalent resistance usually indicates poor conductive contact or an impending arc discharge, while an abnormally low equivalent resistance may mean insulation failure or an unexpected short circuit. The controller 62 proactively takes measures based on this key indicator, effectively preventing safety accidents caused by poor conductivity, such as surface ablation or breakage of the ultra-thin strip 9, or current leakage, thereby improving the safety of equipment operation.

[0045] The present invention also provides a method for controlling the double-sided constant-pressure conductive and insulating tension in ultra-thin strip rolling based on the above-mentioned device, comprising the following steps: S1, passing the ultra-thin strip 9 sequentially through the unwinding unit 1, the inlet guide unit 2, the double-sided constant-pressure conductive unit 3, the rolling deformation unit 4, the insulating tension detection unit 5, the winding centering unit 6, and the winding unit 7; S2, adjusting the clamping pressure of the upper conductive roller 31 and the lower conductive roller 32 on the ultra-thin strip 9 through the constant-pressure adjustment mechanism 34, and obtaining the conductive contact pressure through the pressure feedback device 37; S3, connecting the upper conductive roller 31 and the lower conductive roller 32 as equipotential conductive clamping ends to one pole of the pulse power supply 8, and connecting the other pole of the pulse power supply 8 to a loop conductive element spaced apart from the double-sided constant-pressure conductive unit 3 along the running direction of the ultra-thin strip, so that the pulse current flows through the double-sided constant-pressure unit 9 along the length direction of the ultra-thin strip 9. S4. The strip section between the conductive unit 3 and the circuit conductive component; S5. The ultra-thin strip 9 is rolled into the rolling deformation unit 4 for thinning, and the strip tension is detected by the insulation tension detection unit 5; S6. The lateral offset of the ultra-thin strip 9 is detected by the non-contact edge detection sensor 61, and the axial position of the winding unit 7 is adjusted by the axial fine adjustment mechanism 63; S7. The clamping pressure of the upper conductive roller 31 is adjusted in a closed loop according to the signal of the pressure feedback component 37, and the upper limit of the clamping pressure is limited to avoid damaging the surface of the ultra-thin strip; S8. The speed difference between the unwinding unit 1 and the winding unit 7 is adjusted according to the signal of the fiber optic grating sensor 54 to maintain constant tension; S9. The equivalent resistance R or R / R0 is calculated according to the voltage and current of the pulse power supply 8, and the pulse current is reduced when R / R0 is greater than the first threshold, and the rolling speed is reduced or the machine is stopped when it is greater than the second threshold.

[0046] This method organically integrates four core technologies: double-sided constant voltage conductivity, length-direction energization, anti-interference tension detection, and dynamic winding alignment. It ensures the stability and controllability of the entire process from unwinding to winding, providing a reliable operating standard for the production of high-quality ultra-thin strips.

[0047] The device and method for controlling double-sided constant-pressure conductive and insulating tension in ultra-thin strip rolling provided by this invention are implemented as follows: First, the ultra-thin strip 9 is sequentially passed through the unwinding unit 1, the inlet guide unit 2, the double-sided constant-pressure conductive unit 3, the rolling deformation unit 4, the insulating tension detection unit 5, the winding centering unit 6, and the winding unit 7 to complete the strip threading preparation. After the system is started, the controller 62 issues a command to drive the upper conductive roller 31 to move downward through the constant-pressure adjustment mechanism 34, which, together with the lower conductive roller 32, applies a preset clamping pressure to the ultra-thin strip 9. The pressure feedback component 37 monitors in real time and transmits the data back to the controller 62, forming a closed-loop adjustment to ensure stable and reliable conductive contact. Subsequently, the pulse power supply 8 is started, and its positive terminal is connected to both the upper conductive roller 31 and the lower conductive roller 32 through the conductive connection component 36, making them equipotential conductive clamping ends. The negative terminal is connected to the loop conductive components (such as the conductive rollers in the rolling deformation unit 4) spaced apart along the running direction of the ultra-thin strip. A pulsed current flows out from the upper conductive roller 31 and the lower conductive roller 32, passes through the entry section of the ultra-thin strip 9, crosses the deformation zone of the rolling deformation unit 4, and finally flows to the circuit conductor, completing a full length-direction energizing cycle. Under the action of the pulsed current, the ultra-thin strip 9 is rolled thinner in the rolling deformation unit 4. The rolled ultra-thin strip 9 bypasses the first insulating tension roller 51, the second insulating tension roller 52, and the third insulating tension roller 53 of the insulating tension detection unit 5 in an S-shaped path. The tension of the strip causes a slight deformation in the support beam of the second insulating tension roller 52. The fiber optic grating sensor 54 converts this elastic deformation into a high-precision optical wavelength signal. The controller 62 analyzes the signal to obtain the real-time tension value and adjusts the speed difference between the unwinding unit 1 and the winding unit 7 accordingly. Meanwhile, the non-contact edge detection sensor 61 continuously scans the edge of the ultra-thin strip 9 and sends the detected edge position coordinates to the controller 62. The controller 62 calculates the centerline offset. Once it exceeds the set correction dead zone, it immediately drives the servo motor in the axial fine adjustment mechanism 63, which drives the slide table equipped with the winding unit 7 to move axially through the ball screw, so that the ultra-thin strip 9 being wound is always kept in the correct lateral position.

[0048] The present invention provides a device and method for controlling double-sided constant-voltage conductivity and insulation tension in ultra-thin strip rolling. First, the ultra-thin strip 9 is clamped on both sides using an equipotential upper conductive roller 31 and a lower conductive roller 32. This, combined with closed-loop control of a constant-voltage adjustment mechanism 34 and a pressure feedback component 37, effectively improves the problems of large contact resistance fluctuations, uneven current input, local short circuits, and arc erosion inherent in traditional single-sided or opposite-polarity conductivity methods, ensuring the long-term stability of pulsed current injection. Second, a multi-level insulation structure (first insulation layer 353, second insulation layer 354, and insulating isolation sleeve 11) reliably isolates the double-sided constant-voltage conductivity unit 3 and the circuit conductive components from the frame 10. Simultaneously, the use of an insulating bearing seat 55 and a fiber optic grating sensor 54 in the insulation tension detection unit 5 effectively blocks the leakage path of pulsed current to the equipment body and ground wire. This not only improves energy utilization but also eliminates the influence of electromagnetic interference on the sensor signal, making it possible to stably detect the minute tension of the ultra-thin strip 9 under strong pulsed current conditions. Furthermore, the winding and centering unit 6, through non-contact detection and servo-driven fine-tuning, achieves real-time and precise correction of lateral deviation of the ultra-thin strip 9, significantly reducing defects such as winding misalignment, uneven end faces, and serpentine deviation, thus improving the quality of the finished coil. Finally, the controller 62 collaboratively collects and controls the conductive pressure, strip tension, winding position, rolling speed, and pulse power supply 8 parameters of the entire system, establishing comprehensive process protection logic. When any parameter is abnormal (such as a sudden increase in the equivalent resistance of the conductive circuit), the system can automatically reduce speed, reduce current, or stop, ensuring the safety and stability of the rolling process. In summary, this invention provides a highly integrated and reliable automated solution for pulse current-assisted rolling of ultra-thin strips, especially stainless steel strips and nickel-based alloy strips with a thickness of 0.01mm to 0.10mm, characterized by reliable conductivity, accurate tension detection, neat winding, and high integration.

[0049] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling, characterized in that, The system includes an unwinding unit (1), an inlet guiding unit (2), a double-sided constant voltage conductive unit (3), a rolling deformation unit (4), an insulation tension detection unit (5), a winding centering unit (6), and a winding unit (7) arranged sequentially along the running direction of the ultra-thin strip (9). The double-sided constant voltage conductive unit (3) is electrically connected to a pulse power supply (8). The double-sided constant pressure conductive unit (3) includes an upper conductive roller (31), a lower conductive roller (32), a floating support mechanism (33), a constant pressure adjustment mechanism (34), an insulating mounting base (35), a conductive connection assembly (36), and a pressure feedback component (37). The lower conductive roller (32) and the floating support mechanism (33) are both mounted on the insulating mounting base (35). The upper conductive roller (31) is mounted on the floating support mechanism (33) through the constant pressure adjustment mechanism (34). The upper conductive roller (31) and the lower conductive roller (32) are located on the upper and lower sides of the ultra-thin strip (9) respectively, and are used to form a double-sided clamping conductive contact with the ultra-thin strip (9). The conductive connection assembly (36) is configured such that the upper conductive roller (31) and the lower conductive roller (32) are connected as equipotential conductive clamping ends to one pole of the pulse power supply (8), and the other pole of the pulse power supply (8) is connected to a loop conductive element spaced apart from the double-sided constant voltage conductive unit (3) along the running direction of the ultrathin strip (9), so that the pulse current flows along the length direction of the ultrathin strip (9) through the strip section between the double-sided constant voltage conductive unit (3) and the loop conductive element; The insulation tension detection unit (5) includes an insulation tension roller and a fiber optic grating sensor (54) for detecting the running tension of the ultra-thin strip (9) under electrical insulation conditions; The winding centering unit (6) includes a non-contact edge detection sensor (61), a controller (62), and an axial fine-tuning mechanism (63). The controller (62) is used to control the axial fine-tuning mechanism (63) to adjust the axial position of the winding unit (7) according to the edge position or centerline offset of the ultrathin strip (9) detected by the non-contact edge detection sensor (61).

2. The device for controlling double-sided constant voltage conductivity and insulation tension for ultra-thin strip rolling according to claim 1, characterized in that, The circuit conductive element is electrically isolated from the frame (10) through an insulating support and is arranged at intervals with the double-sided constant voltage conductive unit (3) along the running direction of the ultra-thin strip (9), so that the strip section between the two includes at least the rolling deformation zone or the section adjacent to the rolling deformation zone; the circuit conductive element is one of the conductive roll in the rolling deformation unit (4), the conductive roll group set on the inlet side or outlet side of the rolling deformation unit (4), the second double-sided constant voltage conductive unit, the conductive clamping block or the conductive sliding contact; when the circuit conductive element is the second double-sided constant voltage conductive unit, the structure of the circuit conductive element is the same as that of the double-sided constant voltage conductive unit (3) and is set on the outlet side of the rolling deformation unit (4), and the two are respectively connected to the two poles of the pulse power supply (8), so that the pulse current passes through the rolling deformation zone along the length direction of the ultra-thin strip (9).

3. The device for controlling double-sided constant voltage conductivity and insulation tension for ultra-thin strip rolling according to claim 1, characterized in that, The insulating mounting base (35) includes a support frame (351) and a conductive roller bearing seat (352) located above the support frame (351). The support frame (351) is mounted on the machine frame (10) by fastening bolts (355). A first insulating layer (353) is provided between the conductive roller bearing seat (352) and the support frame (351). A second insulating layer (354) is provided between the support frame (351) and the machine frame (10). An insulating sleeve (11) is provided on the outer periphery of the fastening bolt (355), and the upper and lower ends of the insulating sleeve (11) are in contact with the first insulating layer (353) and the second insulating layer (354) respectively. An upper insulating washer and a lower insulating washer are also provided between the bolt head of the fastening bolt (355) and the first insulating layer (353), and between the nut end and the second insulating layer (354).

4. The device for controlling double-sided constant voltage conductivity and insulation tension for ultra-thin strip rolling according to claim 1, characterized in that, The floating support mechanism (33) includes a guide post (331) mounted on the insulating mounting base (35), a guide slider (332) slidably sleeved on the guide post (331) and a guide sleeve (333), and a swing arm bracket (334) for mounting the guide sleeve (333). The floating support mechanism (33) is used to enable the upper conductive roller (31) to float slightly in a direction perpendicular to the surface of the ultrathin strip (9). The constant pressure regulating mechanism (34) includes a lead screw preload (341) mounted on the swing arm bracket (334), an elastic preload (342) mounted on the lead screw preload (341), and a linear drive (343), wherein the linear drive (343) is a motor drive, a handwheel, or an adjusting handle.

5. The device for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling according to claim 1, characterized in that, The upper conductive roller (31) and the lower conductive roller (32) are provided with a conductive wear-resistant layer (38) on their outer surfaces. The conductive wear-resistant layer (38) is a copper alloy layer, a silver plating layer, a graphite copper composite layer, a carbon-based conductive layer, or a conductive ceramic composite layer.

6. The device for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling according to claim 1, characterized in that, The insulation tension detection unit (5) further includes an insulation bearing seat (55), the insulation tension roller is mounted on the insulation bearing seat (55), the insulation tension roller includes a first insulation tension roller (51), a second insulation tension roller (52) and a third insulation tension roller (53), the ultra-thin strip (9) passes around the first insulation tension roller (51), the second insulation tension roller (52) and the third insulation tension roller (53) in an S-shaped path; the insulation tension detection unit (5) further includes a temperature compensation grating (56), the fiber optic grating sensor (54) includes a measuring grating, and the controller (62) calculates the tension based on the wavelength change difference between the measuring grating and the temperature compensation grating (56).

7. The device for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling according to claim 1, characterized in that, The non-contact edge detection sensor (61) is a laser edge sensor, a CCD vision sensor, a photoelectric edge sensor or a line array camera. The non-contact edge detection sensor (61) is disposed on one or both sides of the ultra-thin strip (9) and is used to obtain the edge coordinates, width center line or lateral offset of the ultra-thin strip (9).

8. The device for controlling double-sided constant voltage conductivity and insulation tension for ultra-thin strip rolling according to claim 1, characterized in that, The controller (62) can synchronously collect the pressure feedback device (37), the fiber optic grating sensor (54), the non-contact edge detection sensor (61), the rolling force signal, the rolling speed signal, and the current, voltage, or frequency parameters of the pulse power supply (8), and coordinately control the constant pressure adjustment mechanism (34), the unwinding drive, the winding drive, the axial fine adjustment mechanism (63), and the pulse power supply (8); when performing axial correction, the controller (62) synchronously monitors the tension signal of the insulation tension detection unit (5), and limits the adjustment speed of the axial fine adjustment mechanism (63) according to the tension fluctuation, so as to avoid the tension change of the ultra-thin strip (9) caused by the correction action.

9. The device for controlling double-sided constant voltage conductivity and insulation tension in ultra-thin strip rolling according to claim 8, characterized in that, The controller (62) calculates the equivalent resistance or contact state index of the conductive circuit based on the output voltage and output current of the pulse power supply (8). When the equivalent resistance or contact state index exceeds the preset range, the controller (62) reduces the pulse current output, reduces the rolling speed, or issues a stop command. Specifically, the controller (62) calculates the real-time equivalent resistance R of the conductive circuit according to the formula R=U / I, or calculates the contact state index R / R0, where R0 is the initial stable equivalent resistance. When R / R0 is greater than the first threshold, the controller (62) reduces the pulse current output. When R / R0 is greater than the second threshold, the controller (62) reduces the rolling speed or issues a stop command.

10. A method for controlling double-sided constant voltage conductive and insulating tension in ultra-thin strip rolling based on the apparatus of any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Pass the ultra-thin strip (9) through the unwinding unit (1), the entrance guiding unit (2), the double-sided constant voltage conductive unit (3), the rolling deformation unit (4), the insulation tension detection unit (5), the winding centering unit (6), and the winding unit (7) in sequence. S2. The clamping pressure of the upper conductive roller (31) and the lower conductive roller (32) on the ultra-thin strip (9) is adjusted by the constant pressure adjustment mechanism (34), and the conductive contact pressure is obtained by the pressure feedback device (37). S3. Connect the upper conductive roller (31) and the lower conductive roller (32) as equipotential conductive clamping ends to one pole of the pulse power supply (8), and connect the other pole of the pulse power supply (8) to the loop conductive element that is spaced apart from the double-sided constant voltage conductive unit (3) along the running direction of the ultra-thin strip, so that the pulse current flows along the length direction of the ultra-thin strip (9) through the strip section between the double-sided constant voltage conductive unit (3) and the loop conductive element; S4. The ultra-thin strip (9) is rolled into the rolling deformation unit (4) for thinning, and the strip tension is detected by the insulation tension detection unit (5). S5. The lateral offset of the ultrathin strip (9) is detected by a non-contact edge detection sensor (61), and the axial position of the winding unit (7) is adjusted by an axial fine-tuning mechanism (63). S6. Adjust the clamping pressure of the upper conductive roller (31) in a closed loop according to the signal of the pressure feedback device (37), and limit the upper limit of the clamping pressure to avoid damaging the surface of the ultra-thin strip. S7. Adjust the speed difference between the unwinding unit (1) and the winding unit (7) according to the signal from the fiber optic grating sensor (54) to maintain constant tension; S8. Calculate the equivalent resistance R or R / R0 based on the voltage and current of the pulse power supply (8), and reduce the pulse current when R / R0 is greater than the first threshold, and reduce the rolling speed or stop the machine when it is greater than the second threshold.

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