Non-oriented silicon steel surface polishing device for ferrous metal smelting rolled product

Abstract

The invention discloses a non-oriented silicon steel surface polishing device for a ferrous metal smelting rolled product, which comprises a closed processing cabin, and a correction mechanism, a transition roller group, a double-sided self-adaptive polishing main machine and a polishing liquid supply system are sequentially arranged in the closed processing cabin along the direction of a production line; the correcting mechanism, the transition roller set and the double-face self-adaptive polishing main machine are fixed to a base of the closed machining cabin through a machining cabin rack. The double-face self-adaptive polishing main machine comprises an upper polishing main machine body and a lower polishing main machine body which are symmetrically arranged up and down, and a silicon steel strip horizontally penetrates through a polishing room formed between the upper polishing main machine body and the lower polishing main machine body. By adopting the upper polishing main machine and the lower polishing main machine which are symmetrically arranged up and down, synchronous and same-parameter polishing treatment can be carried out on the upper surface and the lower surface of the silicon steel strip at the same time, and the problems of performance difference and asymmetric stress caused by the sequence of single-face polishing can be fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of metal smelting and polishing technology, and in particular to a polishing device for the surface of non-oriented silicon steel rolled products from ferrous metal smelting. Background Technology

[0002] Non-oriented silicon steel, a key functional material in the ferrous metal smelting and rolling industry, is widely used in the manufacture of iron cores for power equipment such as motors, transformers, and generators. Its surface quality directly determines the core electromagnetic properties of the iron core, such as magnetic permeability and iron loss value, and has a crucial impact on the energy efficiency and operational stability of power equipment. In the production and processing of non-oriented silicon steel, after smelting, hot rolling, and cold rolling processes, its surface is prone to forming iron oxide scale, rolling oil residue, microcracks, and uneven rolling marks. Without effective polishing, this not only increases eddy current losses but may also lead to surface peeling during subsequent processing and equipment operation, affecting the service life and safety reliability of the equipment. Therefore, surface polishing has become an indispensable key process in the non-oriented silicon steel production chain.

[0003] Currently, in industrial production, the surface treatment of non-oriented silicon steel is usually completed online. The production line typically consists of an uncoiler, pretreatment unit, polishing main unit, inspection unit, and rewinder, with the main processing units, such as the polishing main unit and inspection unit, integrated into a closed processing chamber. The uncoiler releases the steel coil, and the rewinder rewinds the treated strip, forming a continuous operation. However, traditional polishing equipment and processes suffer from numerous technical bottlenecks. Traditional polishing typically employs single-sided polishing or simple double-sided grinding techniques. Single-sided polishing cannot simultaneously guarantee consistent surface quality on both sides of the strip, and it easily causes warping when processing thin-gauge silicon steel. Rigid double-sided clamping, on the other hand, struggles to adapt to the strip's thickness fluctuations and microscopic surface undulations, leading to uneven local pressure and resulting in "over-polishing" or "under-polishing," severely impacting the uniformity of surface quality. The vibration and deviation of the strip during operation further exacerbate this unevenness. In addition, incoming silicon steel strips often exhibit varying degrees of macroscopic curvature or waviness. If directly fed into the polishing machine, these macroscopic defects can disrupt the stable polishing gap, causing drastic fluctuations in polishing pressure and even equipment damage. Although production lines generally include straightening mechanisms, their straightening accuracy and response speed are often insufficient to meet the polishing requirements of high-end non-oriented silicon steel, resulting in poor coordination between the straightening and polishing processes. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a surface polishing device for non-oriented silicon steel products smelted and rolled from ferrous metals.

[0005] This application provides a surface polishing device for non-oriented silicon steel products from ferrous metal smelting and rolling, comprising a closed processing chamber, inside which a straightening mechanism, a transition roller group, a double-sided adaptive polishing host, and a polishing slurry supply system are arranged sequentially along the production line direction; the straightening mechanism, the transition roller group, and the double-sided adaptive polishing host are fixed to the base of the closed processing chamber by a processing chamber frame; the double-sided adaptive polishing host includes an upper polishing host and a lower polishing host arranged symmetrically, and the silicon steel strip passes horizontally through the polishing gap formed between the upper polishing host and the lower polishing host; the roller surface of the transition roller group is parallel to the horizontal plane, and its center height is consistent with the center height of the polishing gap.

[0006] Furthermore, the polishing slurry supply system includes an upper polishing slurry nozzle and a lower polishing slurry nozzle located at the inlet side of the double-sided adaptive polishing host, a polishing slurry supply unit connected to the upper polishing slurry nozzle and the lower polishing slurry nozzle respectively, a polishing slurry recovery tank located below the lower polishing host, and a circulation filter device connecting the polishing slurry recovery tank and the polishing slurry supply unit; the nozzle of the upper polishing slurry nozzle faces the upper surface of the silicon steel strip, the nozzle of the lower polishing slurry nozzle faces the lower surface of the silicon steel strip, and the angle of the nozzle is adjustable.

[0007] Furthermore, the straightening mechanism includes a frame located at the entrance of the enclosed processing chamber, an upper straightening roller group and a lower straightening roller group mounted on the frame, three drive motors that drive the upper and lower straightening roller groups respectively, a roller gap adjustment structure for adjusting the height of the upper straightening roller group, and two laser displacement sensors located on the frame and positioned before and after the upper straightening roller group respectively. The upper straightening roller group includes two parallel upper straightening rollers, and the lower straightening roller group includes one lower straightening roller located at the center position below the two upper straightening rollers. The three drive motors drive each upper and lower straightening roller respectively.

[0008] Furthermore, the roll gap adjustment structure includes a lifting drive assembly fixed on the frame and a lifting bracket disposed at the drive end of the lifting drive assembly, and the upper straightening roll group is mounted on the lifting bracket.

[0009] Furthermore, the upper and lower polishing main units of the dual-sided adaptive polishing main unit each include a macroscopic floating base, a detection platform, and a dual-roll polishing assembly connected in sequence. The macroscopic floating base is fixedly connected to the processing chamber frame through a mounting plate and applies a controllable and uniform reference pressure to the dual-roll polishing assembly. The detection platform is used to detect the pressure distribution and the contour changes of the silicon steel strip, and to pressurize or depressurize specific points based on the detection data.

[0010] Furthermore, the macroscopic floating base includes a fixed base plate, a floating plate connected to the fixed base plate via a linear guide pair, an annular air pressure chamber disposed between the fixed base plate and the floating plate, a pressure regulating assembly disposed on the fixed base plate, and a displacement sensor. The upper and lower surfaces of the annular air pressure chamber are respectively connected to the fixed base plate and the floating plate, and the probe of the displacement sensor is in contact with the floating plate.

[0011] Furthermore, the pressure regulating assembly includes an adjusting screw that is vertically mounted on a bracket in the center of a fixed base plate via a threaded pair, a cam that is fixedly mounted on the adjusting screw, a slip ring that is sleeved on the outside of the adjusting screw and connected to a guide post on the bracket via a bearing, and a handwheel mounted on the end of the adjusting screw. The lower end face of the slip ring contacts the floating plate, and the upper end face contacts the outer edge of the cam.

[0012] Furthermore, the detection platform includes a force distribution intermediate plate connected to the floating plate on the side opposite to the fixed base plate via a ball joint, multiple laser profile scanners disposed around the force distribution intermediate plate, and multiple miniature pressure sensors embedded in the lower surface of the force distribution intermediate plate.

[0013] Furthermore, the dual-roll polishing assembly includes an actuator array plate connected to the force distribution intermediate plate, a plurality of miniature hydraulic cylinders arrayed on the actuator array plate, a plurality of automatic compensation drive units disposed above some of the miniature hydraulic cylinders, a buffer bracket connected to the piston rod of the miniature hydraulic cylinders, and two parallel polishing rollers disposed on the buffer bracket. The two polishing rollers are driven by polishing motors respectively, and the two polishing rollers rotate at different speeds. The pressure chambers of each miniature hydraulic cylinder are interconnected through the internal oil circuit of the actuator array plate, and each automatic compensation drive unit corresponds one-to-one with a portion of the miniature hydraulic cylinders.

[0014] Furthermore, the automatic compensation drive unit includes a miniature servo motor fixed to the actuator array plate via a motor bracket, a lead screw connected to the output shaft of the miniature servo motor via a coupling, and a nut screwed to the lead screw. The nut is fixed to the piston rod of the corresponding miniature hydraulic cylinder via a nut seat, and both ends of the lead screw are connected to the actuator array plate via angular contact ball bearings.

[0015] Compared with existing technologies, this invention uses an upper polishing host and a lower polishing host arranged symmetrically to simultaneously polish the upper and lower surfaces of silicon steel strip with the same parameters. This can fundamentally eliminate the performance differences and asymmetric stress problems caused by the sequence of single-sided polishing. In addition, a correction mechanism is set up before polishing to detect and correct the macroscopic bending and waviness of the silicon steel strip online and in real time, providing a flat "qualified blank" for subsequent polishing, and solving the problem of the constraint of incoming material quality fluctuation on the final polishing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0017] Figure 1 This is a schematic diagram of the surface polishing device for non-oriented silicon steel products smelted and rolled by ferrous metal smelting according to the present invention; Figure 2 yes Figure 1 Enlarged view of A in the middle; Figure 3 This is a bottom view of the force distribution intermediate plate of the present invention; Figure 4 This is a side view of the polishing fluid supply system of the present invention; Figure 5 This is a partial top view of the polishing fluid supply system of the present invention; Figure 6 This is a schematic diagram of the upper straightening roller of the present invention; Figure 7 This is a schematic diagram of the structure of the polishing roller of the present invention.

[0018] The reference numerals in the attached figures include: 1. Correction mechanism; 11. Frame; 12. Upper correction roller group; 13. Lower correction roller group; 14. Drive motor; 15. Roll gap adjustment structure; 151. Lifting drive assembly; 152. Lifting bracket; 16. Laser displacement sensor; 2. Transition roller group; 3. Double-sided adaptive polishing host; 31. Upper polishing host; 32. Lower polishing host; 33. Macroscopic floating base; 331. Fixed base plate; 332. Linear guide pair; 333. Floating plate; 334. Annular air pressure chamber; 335. Displacement sensor; 336. Bracket; 337. Adjusting screw; 338. Cam; 339. Bearing; 340. Slip ring; 341. Handwheel; 342. Guide column; 35. Detection platform; 352. Ball joint 353. Force distribution intermediate plate; 354. Laser profile scanner; 355. Miniature pressure sensor; 36. Dual-roll polishing assembly; 361. Actuator array plate; 362. Miniature hydraulic cylinder; 363. Buffer bracket; 364. Polishing roller; 365. Polishing motor; 366. Miniature servo motor; 367. Lead screw; 368. Nut; 4. Polishing slurry supply system; 41. Upper polishing slurry nozzle; 42. Lower polishing slurry nozzle; 43. Polishing slurry supply unit; 44. Polishing slurry recovery tank; 45. Circulating filtration device; 451. Sedimentation tank; 452. Hydrocyclone separator; 453. Filter bag; 454. Circulating pipeline; 5. Enclosed processing chamber; 6. Processing chamber frame; 7. Silicon steel strip. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] like Figure 1 As shown, the surface polishing device for non-oriented silicon steel of ferrous metal smelting and rolling products of the present invention includes a closed processing chamber, inside which a straightening mechanism 1, a transition roller group 2, a double-sided adaptive polishing host 3 and a polishing liquid supply system 4 are arranged sequentially along the production line direction; the straightening mechanism 1, the transition roller group 2 and the double-sided adaptive polishing host 3 are fixed on the base of the closed processing chamber 5 by the processing chamber frame 6; the double-sided adaptive polishing host 3 includes an upper polishing host 31 and a lower polishing host 32 arranged symmetrically above and below, and the silicon steel strip 7 passes horizontally through the polishing gap formed between the upper polishing host 31 and the lower polishing host 32; the roller surface of the transition roller group 2 is parallel to the horizontal plane, and its center height is consistent with the center height of the polishing gap.

[0021] This invention employs an upper polishing host 31 and a lower polishing host 32 arranged symmetrically, which can simultaneously polish the upper and lower surfaces of the silicon steel strip 7 with the same parameters. This can fundamentally eliminate the performance differences and asymmetric stress problems caused by the sequence of single-sided polishing. In addition, a correction mechanism 1 is set before polishing, which can detect and correct the macroscopic bending and waviness of the silicon steel strip 7 online and in real time, providing a flat "qualified blank" for subsequent polishing, and can solve the constraint of the incoming material quality fluctuation on the final polishing effect.

[0022] In some embodiments, such as Figure 1 , Figure 4 , Figure 5 As shown, the polishing slurry supply system 4 includes an upper polishing slurry nozzle 41 and a lower polishing slurry nozzle 42 located on the inlet side of the double-sided adaptive polishing host 3, a polishing slurry supply unit 43 connected to the upper polishing slurry nozzle 41 and the lower polishing slurry nozzle 42 respectively, a polishing slurry recovery tank 44 located below the lower polishing host 32, and a circulation filter device 45 connecting the polishing slurry recovery tank 44 and the polishing slurry supply unit 43; the nozzle of the upper polishing slurry nozzle 41 faces the upper surface of the silicon steel strip 7, the nozzle of the lower polishing slurry nozzle 42 faces the lower surface of the silicon steel strip 7, and the angle of the nozzle is adjustable.

[0023] In this embodiment, by symmetrically arranging polishing liquid nozzles on the upper and lower sides of the polishing host inlet side, and precisely positioning the upper polishing liquid nozzle towards the upper surface of the silicon steel and the lower polishing liquid nozzle towards the lower surface of the silicon steel, a complete polishing liquid film can be immediately and uniformly applied to the upper and lower surfaces of the silicon steel strip 7 at the moment it enters the polishing gap. This design ensures that the polished surface is always in an ideal environment of lubrication, cooling and chemical action.

[0024] Specifically, the polishing slurry supply unit 43 includes a supply tank, a supply pipe connecting the supply tank and each nozzle, and a supply pump located on the supply pipe, used to flow the polishing slurry stored in the supply tank into the nozzle through the supply pipe. The nozzle is provided with a nozzle at its end (the nozzle is hinged to the nozzle). The circulating filtration device 45 can be a commonly used filter box, or it can adopt the following structure: the circulating filtration device 45 includes a multi-stage series sedimentation tank 451 connected to the polishing slurry recovery tank 44 (in the attached drawings of this embodiment, one sedimentation tank is used as an example), and a precision filter connected to the sedimentation tank 451. The system includes a filtration unit and a circulation supply and pressure stabilization unit. The first-stage sedimentation tank 451 is equipped with an inclined guide plate to reduce the flow rate, allowing heavier metal debris and coarse abrasive particles to settle naturally under gravity. The overflow port at the top of the first-stage sedimentation tank 451 connects to the top inlet of the second-stage sedimentation tank 451, which can be equipped with a metal magnetic grid or magnetic roller to adsorb and separate ferromagnetic particles from the polishing fluid. The precision filtration unit includes a hydrocyclone separator 452 and multi-layer filter bags 453 located at its outlet. The hydrocyclone separator 452 further separates denser fine particles using centrifugal force. For micro-solid particles, the multi-layer filter bag 453 serves as a fine filtration stage, with a filtration accuracy selectable between 1μm and 10μm according to process requirements. This unit adopts a parallel bypass design, sharing the same main supply pipe connected to the outlet of the hydrocyclone 452. This means that while one set of filter bags 453 is operating, the other set can be cleaned or replaced, ensuring continuous filtration operations without affecting main machine production. The circulating supply to the pressure and temperature unit includes a connecting circulation pipe 454 (on which a centrifugal pump is installed), one end of which is connected to the overflow port of each filter bag 453 via a branch pipe, and the other end is connected to... The system is connected to the supply tank and the nozzle respectively. The supply tank is equipped with a detection sensor to monitor the concentration of the polishing liquid in real time. When the concentration increases due to evaporation or carryover, deionized water is automatically added. When the concentration is too low, a new liquid replenishment pump can be activated to add high-concentration polishing liquid concentrate (valves are installed on the connection sides of the circulation pipe 454 to the supply tank and the nozzle, and the replenishment of polishing liquid is controlled by the valves). In addition, electric drain valves are installed at the bottom of the filter box and the filter bag 453, which can be automatically opened according to the set time interval or the liquid level sensor signal to discharge the concentrated waste residue into the waste collection vehicle.

[0025] In some embodiments, such as Figure 1 , Figure 6As shown, the straightening mechanism 1 includes a frame 11 located at the entrance of the enclosed processing chamber 5, an upper straightening roller group 12 and a lower straightening roller group 13 located on the frame 11, three drive motors 14 that drive the upper straightening roller group 12 and the lower straightening roller group 13 respectively, a roller gap adjustment structure 15 for adjusting the height of the upper straightening roller group 12, and two laser displacement sensors 16 located on the frame 11 and positioned before and after the upper straightening roller group 12 respectively. The upper straightening roller group 12 includes two parallel upper straightening rollers, and the lower straightening roller group 13 includes one lower straightening roller located at the center position below the two upper straightening rollers. The three drive motors 14 drive each upper straightening roller and the lower straightening roller respectively. The roller gap adjustment structure 15 includes a lifting drive assembly 151 fixed on the frame 11 and a lifting bracket 152 located at the driving end of the lifting drive assembly 151. The upper straightening roller group 12 is mounted on the lifting bracket 152.

[0026] In this embodiment, a roller system arrangement of "two on top and one on the bottom" with the bottom roller centered is adopted, forming a stable three-point bending stress model on the cross-section of the silicon steel strip 7. This layout can effectively correct the longitudinal bending and transverse wavy shape of the strip at the same time, resulting in stronger flattening ability. Since the three straightening rollers are driven by independent drive motors 14, a precise and controllable speed difference can be formed between the upper and lower rollers. The shearing force generated by the speed difference can effectively eliminate the additional stress inside the strip, realizing the simultaneous "shaping" and "stress relief", fundamentally improving the flatness and stability of the incoming material, and laying a solid foundation for obtaining a high-precision polished surface. In addition, laser displacement sensors 16 are set before and after the straightening roller group, forming a closed-loop detection system: the front sensor detects the initial curvature of the strip, and the rear sensor verifies the straightening effect in real time. This system can provide real-time feedback on the straightening quality and allows the control system (such as PLC) to dynamically adjust the roller gap or speed difference based on the feedback data, realizing an adaptive and intelligent straightening process, ensuring that no matter how the incoming material fluctuates, the strip output to the polishing host is a strip with qualified flatness.

[0027] Specifically, the lifting drive assembly 151 adopts commonly used worm gear lifts, linear guides, lifting motors, etc., which can directly drive the movement of the lifting bracket 152. This scheme of adjusting the upper straightening roller group 12 as a whole avoids the asynchronous problem that may occur when adjusting a single roller, and ensures the parallelism and relative position accuracy of the two upper straightening rollers.

[0028] In some embodiments, such as Figure 1As shown, the upper polishing host 31 and the lower polishing host 32 of the double-sided adaptive polishing host 3 both include a macroscopic floating base 33, a detection platform 35 and a double-roll polishing assembly 36 connected in sequence. The macroscopic floating base 33 is fixedly connected to the processing chamber frame 6 through a mounting plate and applies a controllable and uniform reference pressure to the double-roll polishing assembly 36. The detection platform 35 is used to detect the pressure distribution and the contour change of the silicon steel strip 7, and pressurize or depressurize specific points based on the detection data.

[0029] In this embodiment, a macroscopic floating base 33 provides a controllable and uniform reference pressure for the entire polishing assembly. This establishes a stable "basic surface" for the entire polishing process. Combined with the symmetrical arrangement of the upper and lower main units, this reference pressure acts simultaneously on the upper and lower surfaces of the silicon steel strip 7, fundamentally ensuring the consistency of the removal rate of double-sided polishing and effectively eliminating the problems of strip bending or single-sided over-polishing caused by pressure asymmetry. The detection platform 35, as the "sensory nerve" of the system, can synchronously and in real time detect the pressure distribution and the contour changes of the silicon steel strip 7. This means that the system can not only "see" the geometry of the silicon steel surface, but also "sense" the real-time contact state, thereby obtaining sufficient data for comprehensive adaptive judgment. Based on this detection data, the system can dynamically and accurately apply pressure or depressurize specific points. This mechanism realizes the "real-time tracking and compensation" of the polishing pressure on the micro-undulations of the silicon steel surface. Whether it is a local bulge or a depression, the system can automatically adjust the force at that point, thereby completely eliminating the "edge effect" and "micro-area over-polishing / under-polishing" phenomena commonly found in traditional polishing.

[0030] In some embodiments, such as Figure 1 , Figure 2 As shown, the macroscopic floating base 33 includes a fixed base plate 331, a floating plate 333 connected to the fixed base plate 331 via a linear guide pair 332, an annular air pressure chamber 334 disposed between the fixed base plate 331 and the floating plate 333, a pressure regulating assembly disposed on the fixed base plate 331, and a displacement sensor 335. The upper and lower surfaces of the annular air pressure chamber 334 are respectively connected to the fixed base plate 331 and the floating plate 333, and the probe of the displacement sensor 335 is in contact with the floating plate 333. The pressure regulating assembly includes an adjusting screw 337 vertically mounted on a bracket 336 at the center of a fixed base plate 331 via a threaded pair, a cam 338 fixedly mounted on the adjusting screw 337, a slip ring 340 sleeved on the outside of the adjusting screw 337 and connected to a guide post 342 on the bracket 336 via a bearing 339, and a handwheel 341 mounted on the end of the adjusting screw 337. The lower end face of the slip ring 340 contacts the floating plate 333, and the upper end face contacts the outer edge of the cam 338.

[0031] In this embodiment, the parallel and collaborative design of the annular air pressure chamber 334 and the pressure regulating component achieves complementary advantages. The annular air pressure chamber 334, as a large-area flexible support element, can provide a uniform, stable, and well-buffered reference support force. The force regulating component, as a precise, reliable, and infinitely lockable precision transmission mechanism, drives the cam 338 by rotating the handwheel 341, accurately converting the rotational motion into the linear displacement of the slip ring 340, thereby applying a precisely controllable mechanical pressure to the floating plate 333. In addition, the slip ring 340 is connected to the bracket 336 through the bearing 339, and its lower end face is designed to contact rather than be fixedly connected to the floating plate 333. This design ensures that when adjusting the pressure, the rotation of the cam 338 will not transmit torque to the floating plate 333, while allowing the floating plate 333 to generate a small relative movement with the slip ring 340 during adaptive deflection. This decouples the pressure regulating function from the leveling function of the floating plate 333, avoids internal motion interference, and ensures smooth and reliable long-term operation.

[0032] Specifically, the annular pneumatic chamber 334 adopts a bladder-like structure, which is connected to an external air source through an air tube to provide overall support force; the displacement sensor 335 can provide real-time feedback of the macroscopic position, and its probe is in direct contact with the floating plate 333, enabling real-time and high-precision monitoring of the absolute position of the floating plate 333. This position signal directly reflects the comprehensive displacement of the system under the combined action of the annular pneumatic chamber 334 and the cam 338 mechanism, and is a key feedback signal for macroscopic pressure control; by combining this displacement signal with the pressure signal of the pneumatic chamber, the control system can construct a precise pressure-displacement closed-loop control loop to achieve precise setting and stable maintenance of the macroscopic reference pressure.

[0033] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, the detection platform 35 includes a force distribution intermediate plate 353 connected to the floating plate 333 on the side away from the fixed base plate 331 via a ball joint 352, a plurality of laser profile scanners 354 disposed around the force distribution intermediate plate 353, and a plurality of miniature pressure sensors 355 embedded in the lower surface of the force distribution intermediate plate 353.

[0034] In this embodiment, the force distribution intermediate plate 353 is connected to the macroscopic floating base 33 by ball joint 352, thereby decoupling the torque. This allows the entire twin-roll polishing assembly 36 below to freely deflect within ±3° at the moment of contact with the silicon steel strip 7, thus automatically achieving "surface contact" with the strip surface, rather than "line contact" that may lead to pressure concentration. The laser profile scanner 354 can scan and construct a two-dimensional topography map of the surface of the silicon steel strip 7 before it enters the polishing contact area, predicting the upcoming profile undulations. The pressure sensor can directly and in real time measure the actual pressure distribution map of the polishing contact area, reflecting the real working conditions under the combined effect of all factors, including polishing pad wear and polishing fluid distribution.

[0035] Specifically, the ball joint 352 includes a ball head and a ball socket. The ball socket is fixed to the floating plate 333 by bolts, and the ball head is connected to the center of the force distribution intermediate plate 353. A damping spring is provided in the ball socket to provide controllable friction damping. Four sets of laser profile scanners 354 are installed at the four corners of the force distribution intermediate plate 353 through their respective brackets 336, with the scanning heads facing the silicon steel strip 7 diagonally downward. Three miniature pressure sensors 355 are provided and distributed in a triangle. When they are detected, because they are embedded in the lower surface of the force distribution intermediate plate 353, their sensitive elements (detection surfaces) are in direct contact with the material of the force distribution intermediate plate 353. Therefore, when the polishing reaction force is applied to the force distribution intermediate plate 353 through the hydraulic cylinder, a small strain (or stress) will be generated in the plate. The pressure sensor measures this local stress.

[0036] In some embodiments, such as Figure 1 , Figure 2 , Figure 7As shown, the dual-roll polishing assembly 36 includes an actuator array plate 361 (the two plates are connected by bolts) connected to a force distribution intermediate plate 353, multiple micro hydraulic cylinders 362 (e.g., 24) arrayed on the actuator array plate 361, multiple automatic compensation drive units located above some of the micro hydraulic cylinders 362, a buffer bracket 363 connected to the piston rod of the micro hydraulic cylinders 362, and two parallel polishing rollers 364 located on the buffer bracket 363. The two polishing rollers 364 are driven by polishing motors 365 respectively, and the two polishing rollers 364 rotate at different speeds. The speeds of the micro hydraulic cylinders 362 are also different. The pressure chambers are interconnected through the internal oil circuit of the actuator array plate 361, and each automatic compensation drive unit corresponds to a part of the micro hydraulic cylinders 362. The automatic compensation drive unit includes a micro servo motor 366 fixed to the actuator array plate 361 through a motor bracket 336, a lead screw 367 connected to the output shaft of the micro servo motor 366 through a coupling, and a nut 368 screwed to the lead screw 367. The nut 368 is fixed to the piston rod of the corresponding micro hydraulic cylinder 362 through the nut 368 seat, and the two ends of the lead screw 367 are respectively connected to the actuator array plate 361 through angular contact ball bearings 339.

[0037] In this embodiment, by interconnecting the pressure chambers of multiple micro hydraulic cylinders 362, a highly efficient "bionic hydraulic network" is formed (i.e., passive self-adaptation is achieved). When a bulge appears on the silicon steel surface below a certain hydraulic cylinder, the piston at that location is pressurized, immediately squeezing the hydraulic oil towards the adjacent area, forcing the piston rod in the corresponding recessed area to automatically push out. To address the significant deficiency that passive self-adaptation cannot fully compensate for, the system is equipped with multiple automatic compensation drive units corresponding one-to-one with the micro hydraulic cylinders 362. These units drive the lead screw 367 via a micro servo motor 366, which in turn drives the nut 368 fixed to the piston rod, enabling precise, digital micron-level adjustment of the piston stroke of a single hydraulic cylinder. In addition, two parallel polishing rollers 364 are driven by independent motors with different rotation speeds, which generates a continuous shearing polishing force on the silicon steel surface. This shearing force effectively disrupts and eliminates the "rib marks" or "vibration marks" that are inevitably produced by unidirectional polishing, making the surface microstructure more uniform and isotropic.

[0038] The production line inside the enclosed processing chamber of this invention uses an uncoiler and a rewinder to transfer silicon steel coils throughout the entire production line. The structural relationship is as follows: uncoiler, straightening mechanism 1, transition roller group 2, double-sided adaptive polishing host 3, transition roller group 2, surface inspection unit, and rewinder. The uncoiler, rewinder, and surface inspection unit (which uses cameras or sensors to inspect the polished silicon steel surface and determine if the polishing is qualified) are all commonly used structures and will not be elaborated further. Furthermore, the device controls the aforementioned electrical components through a control system. For example, the PLC, laser displacement sensor 16 (model KEYENCE IL-601), displacement sensor 335 (KTC-100), laser contour scanner 354 (LJ-V7020), miniature pressure sensor 355 (FSH0604), and servo / drive motor 14 (42HS04) are all electrically connected to the control system. Their specific connection methods are commonly used technologies and will not be elaborated further.

[0039] Working principle: First, the silicon steel strip 7 enters the straightening mechanism 1. The laser displacement sensors 16 located before and after the straightening roller group detect the initial curvature of the strip in real time. If the curvature exceeds the standard, the control system instructs the roller gap adjustment mechanism to drive the upper straightening roller group 12 to press down as a whole. At the same time, the speed difference between the three independently driven straightening rollers is used to perform a combination of extrusion and shearing on the strip to eliminate its macroscopic waviness and internal stress. The straightened strip provides a flat reference surface for subsequent polishing. Next, the leveled silicon steel strip 7 is precisely guided by the transition roller group 2 and smoothly enters the double-sided adaptive polishing host 3. The center height of the transition roller group 2 is strictly consistent with the center height of the polishing gap, ensuring that there is no additional stress or deformation of the strip during the conveying process. At the same time, the polishing liquid supply system 4 is started, and its upper and lower polishing liquid nozzles 42 spray polishing liquid onto the upper and lower surfaces of the silicon steel strip 7 at an adjustable angle to form a uniform lubricating film. The used polishing liquid is collected in the recycling tank, purified, temperature-adjusted, and concentrated by the circulation filtration device, and then pumped back into the system to achieve environmental protection and high-efficiency utilization. Next, the silicon steel strip 7 enters the polishing gap formed by the upper and lower polishing hosts 32. First, global process parameters are set through the macroscopic floating base 33: the operator rotates the handwheel 341, which drives the cam 338 to rotate through the adjusting screw 337, pushing the slip ring 340 to move downward, thereby applying a controllable reference pressure to the floating plate 333. This pressure is uniformly supported by the annular bladder-type air pressure chamber and monitored in real time by the displacement sensor 335. Subsequently, the ball joint 352 allows the force distribution intermediate plate 353 and the entire polishing mold it supports to be initially leveled, ensuring stress-free contact with the strip surface. Then, the laser contour scanners 354 arranged around the perimeter scan the strip surface in advance to predict contour undulations. Meanwhile, the array of miniature pressure sensors 355 embedded in the lower surface of the force distribution intermediate plate 353 provides real-time feedback on the actual pressure distribution map of the polishing area. Then, passive adaptation (millisecond-level response): all micro hydraulic cylinders 362 are interconnected through the oil circuit inside the actuator array plate 361 to form a "bionic hydraulic network": when a local bulge in the strip causes the pressure of the hydraulic cylinder at that location to increase, the piston is compressed, and the hydraulic oil is instantly squeezed to the hydraulic cylinder corresponding to the adjacent concave area, forcing the piston rod at that location to push out more forcefully. Active compensation (precise intervention): Based on the data predicted by the laser profilometer and the real-time data fed back by the pressure sensor, the control system issues a command to the automatic compensation drive unit; the micro servo motor 366 drives the lead screw 367 to rotate, which drives the piston of the nut 368 and the specific micro hydraulic cylinder 362 fixed thereto to make precise up and down displacement, and performs fixed-point intervention to pressurize or depressurize the point. Differential shearing polishing: While the pressure is adaptively controlled, the two polishing rollers 364 of the dual-roll polishing assembly 36 rotate at different speeds under the drive of independent motors. The shearing force generated by this speed difference can effectively disrupt and eliminate the "rib pattern" that is inevitably produced by unidirectional polishing, and obtain an ultra-smooth surface with better isotropy and irregular texture. Finally, the silicon steel strip 7, after adaptive polishing, is guided by another set of transition rollers 2 and enters the surface quality inspection unit for final online inspection. Qualified products are then collected by the winding device.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0042] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0043] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A device for polishing the surface of a ferrous metallurgical rolled product non-oriented silicon steel, characterized in that, The closed processing cabin (5) is internally provided with a correction mechanism (1), a transition roller group (2), a double-sided self-adaptive polishing main machine (3) and a polishing liquid supply system (4) in sequence along the production line direction; the correction mechanism (1), the transition roller group (2) and the double-sided self-adaptive polishing main machine (3) are fixed on the base of the closed processing cabin (5) through the processing cabin rack (6); the double-sided self-adaptive polishing main machine (3) comprises an upper polishing main machine (31) and a lower polishing main machine (32) arranged symmetrically up and down, and a silicon steel strip (7) horizontally passes through a polishing gap formed between the upper polishing main machine (31) and the lower polishing main machine (32); the roller surface of the transition roller group (2) is parallel to the horizontal plane, and the center height is consistent with the center height of the polishing gap.

2. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 1, wherein The polishing liquid supply system (4) comprises an upper polishing liquid spray pipe (41) and a lower polishing liquid spray pipe (42) arranged at the inlet side of the double-sided self-adaptive polishing main machine (3), a polishing liquid supply unit (43) connected with the upper polishing liquid spray pipe (41) and the lower polishing liquid spray pipe (42) respectively, a polishing liquid recovery tank (44) arranged below the lower polishing main machine (32), and a circulating filter device (45) connecting the polishing liquid recovery tank (44) and the polishing liquid supply unit (43); the nozzle of the upper polishing liquid spray pipe (41) faces the upper surface of the silicon steel strip (7), the nozzle of the lower polishing liquid spray pipe (42) faces the lower surface of the silicon steel strip (7), and the angle of the nozzle is adjustable.

3. The ferrous metal smelted and rolled product surface polishing device for non-oriented silicon steel of claim 2, wherein, The correction mechanism (1) comprises a rack (11) arranged at the inlet of the closed processing cabin (5), an upper correction roller group (12) and a lower correction roller group (13) arranged on the rack (11), three drive motors (14) respectively driving the upper correction roller group (12) and the lower correction roller group (13), a roller gap adjusting structure (15) for adjusting the height of the upper correction roller group (12), and two laser displacement sensors (16) arranged on the rack (11) and respectively located in front of and behind the upper correction roller group (12); the upper correction roller group (12) comprises two parallel arranged upper correction rollers, the lower correction roller group (13) comprises one lower correction roller, and the lower correction roller is located at the center position below the two upper correction rollers; the three drive motors (14) drive each upper correction roller and lower correction roller respectively.

4. The ferrous metal smelted and rolled product surface polishing device for non-oriented silicon steel of claim 3, wherein The roller gap adjusting structure (15) comprises a lifting drive assembly (151) fixed on the rack (11) and a lifting bracket (152) arranged at the driving end of the lifting drive assembly (151); the upper correction roller group (12) is mounted on the lifting bracket (152).

5. The ferrous metallurgical calendered product surface polishing apparatus as defined in claim 4 wherein, The upper polishing host (31) and the lower polishing host (32) of the double-sided adaptive polishing host (3) both comprise a macro floating base (33), a detection platform (35) and a double-roller polishing assembly (36) connected in sequence, the macro floating base (33) is fixedly connected with the machining cabin rack (6) through a mounting plate and applies a controllable and uniform reference pressure to the double-roller polishing assembly (36), and the detection platform (35) is used for detecting pressure distribution and profile change of the silicon steel strip (7) and performing pressure increase or pressure reduction on specific points based on detection data.

6. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 5, wherein The macro floating base (33) comprises a fixed base plate (331), a floating plate (333) connected with the fixed base plate (331) through a linear guide pair (332), an annular air pressure cavity (334) arranged between the fixed base plate (331) and the floating plate (333), a pressure adjusting assembly and a displacement sensor (335) arranged on the fixed base plate (331), the upper and lower surfaces of the annular air pressure cavity (334) are connected with the fixed base plate (331) and the floating plate (333) respectively, and the measuring head of the displacement sensor (335) is in contact with the floating plate (333).

7. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 6, wherein The pressure adjusting assembly comprises an adjusting screw (337) vertically installed on a support (336) in the center of the fixed base plate (331) through a threaded pair, a cam (338) fixedly installed on the adjusting screw (337), a slip ring (340) sleeved on the outside of the adjusting screw (337) and connected with a guide column (342) on the support (336) through a bearing (339), and a hand wheel (341) installed on the end of the adjusting screw (337), the lower end surface of the slip ring (340) is in contact with the floating plate (333), and the upper end surface is in contact with the outer edge of the cam (338).

8. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 7, wherein The detection platform (35) comprises a force distribution intermediate plate (353) connected with the side of the floating plate (333) away from the fixed base plate (331) through a ball hinge pair (352), a plurality of laser profile scanners (354) arranged around the force distribution intermediate plate (353), and a plurality of micro pressure sensors (355) embedded in the lower surface of the force distribution intermediate plate (353).

9. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 8, wherein The double-roller polishing assembly (36) comprises an actuator array plate (361) connected with the force distribution intermediate plate (353), a plurality of micro hydraulic cylinders (362) arranged in the array on the actuator array plate (361), a plurality of automatic compensation driving units arranged above part of the micro hydraulic cylinders (362), a buffer support (363) connected with the piston rod of the micro hydraulic cylinder (362), and two polishing rollers (364) arranged in parallel on the buffer support (363), the two polishing rollers (364) are respectively driven by polishing motors (365), the rotating speeds of the two polishing rollers (364) are different, and the pressure cavities of the micro hydraulic cylinders (362) are communicated with each other through the internal oil circuit of the actuator array plate (361), and each automatic compensation driving unit corresponds to part of the micro hydraulic cylinders (362).

10. The ferrous metal smelted and rolled product surface polishing apparatus for non-oriented silicon steel sheet as claimed in claim 9, wherein The automatic compensation driving unit comprises a micro servo motor (366) fixed on the actuator array plate (361) through a motor support (336), a lead screw (367) connected with the output shaft of the micro servo motor (366) through a coupling, and a nut (368) screwed with the lead screw (367), the nut (368) is fixed with the piston rod of the corresponding micro hydraulic cylinder (362) through a nut (368) seat, and the two ends of the lead screw (367) are respectively connected with the actuator array plate (361) through angular contact ball bearings (339).

Images