A high-speed longitudinal shearing device for cold-rolled steel sheets

Abstract

This invention discloses a high-speed slitting device for cold-rolled steel sheets, relating to the field of cold-rolled steel sheet shearing technology. It includes a shearing assembly for cutting cold-rolled steel sheet coils, with a pre-treatment box mounted on the front surface of the shearing assembly. In operation, the invention starts an electromagnetic rod and a rolling motor. The rolling motor drives a drive gear to rotate, which in turn drives two driven gears to rotate in opposite directions. These gears, through a gear ring, drive two toothed rods to rotate, further rotating the upper and lower rolling rollers to electromagnetically roll the two sides of the cold-rolled steel sheet. Combined with an eddy current sensor and a PLC controller, the magnetic field force is intelligently and dynamically adjusted according to the edge conditions of different hardness levels, achieving "flexible de-hardening." Then, a U-shaped focusing induction coil is activated to achieve rapid localized heating of the hardened layer, restoring the hardness to near that of the substrate, thus eliminating work hardening. The combination of magnetic rolling and localized heating softening achieves "full-thickness softening."

Description

Technical Field

[0001] This invention relates to the field of cold-rolled steel sheet shearing technology, specifically to a high-speed longitudinal shearing and slitting device for cold-rolled steel sheets. Background Technology

[0002] Cold-rolled steel sheet refers to steel sheet produced by rolling hot-rolled steel sheet at room temperature using a cold rolling mill. Compared to hot-rolled steel sheet, the rolling process of cold-rolled steel sheet does not involve heating; instead, it relies on mechanical force to compress and stretch the steel sheet, resulting in thinner thickness, higher dimensional accuracy, and a smoother surface quality. Metal cutting is a crucial step in the processing of cold-rolled steel sheet. Through slitting, wide coils of cold-rolled steel sheet can be cut simultaneously along their length using multiple cuts, dividing them into several narrow strips to meet different needs.

[0003] In existing technologies, during the rolling process of cold-rolled steel sheets, the rolling force and friction on the two edges are greater than those on the center, causing the surface metal grains to break and the dislocation density to increase, forming a hardened layer with a higher hardness than the matrix. When the cold-rolled steel sheet coil enters the slitting machine for high-speed shearing through the uncoiler, the hardened layer on the two edges becomes even more brittle, easily generating instantaneous impact loads during shearing. Over time, this can easily lead to micro-cracks on the blade edge, expanding the wear area and producing "serrated edges." This not only reduces the blade's lifespan, requiring frequent machine shutdowns for blade replacement and reducing work efficiency, but also causes burrs to form at the shearing point of the cold-rolled steel sheet, affecting the slitting effect.

[0004] Therefore, we propose a high-speed longitudinal shearing device for cold-rolled steel sheets to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a high-speed slitting device for cold-rolled steel sheets, which solves the problem mentioned in the background art that when cold-rolled steel sheets enter a slitting machine for high-speed shearing, the hardened layer on both sides of the sheet is more brittle, and instantaneous impact loads are easily generated during shearing, which can easily cause micro-cracks on the blade edge, producing "serrated edges". This not only reduces the service life of the blade, requiring multiple machine stops to replace the blade and reducing work efficiency, but also causes burrs to be generated at the narrow strip shearing point, affecting the slitting effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-speed longitudinal shearing and slitting device for cold-rolled steel sheets, comprising a shearing assembly for cutting cold-rolled steel sheet coils, a pretreatment box provided on the front surface of the shearing assembly, de-hardening assemblies provided on both outer surfaces of the pretreatment box for treating the hardened layer on both sides of the cold-rolled steel sheet coil, an impurity removal assembly for removing impurities from the upper and lower surfaces of the cold-rolled steel sheet coil provided inside the pretreatment box, and a PLC controller fixedly installed on the top of the pretreatment box;

[0007] Both of the aforementioned de-hardening components include U-shaped focusing induction coils. Two rolling rollers are mounted on the front surface of each of the two U-shaped focusing induction coils. Electromagnetic rods are installed inside each of the four rolling rollers. Detection holes are opened on the front surface of the outer surfaces of both sides of the pretreatment box. Eddy current sensors are installed inside each of the two detection holes. The two eddy current sensors are used to detect the degree of hardening on both sides of the cold-rolled steel strip. The PLC controller intelligently adjusts the magnetic field strength of the electromagnetic rods based on the hardening data. The rolling rollers are responsible for rolling the upper and lower surfaces of both sides of the cold-rolled steel plate to initially eliminate work hardening. The U-shaped focusing induction coils are responsible for heating the hardened layer, so that the hardness of the hardened layer recovers to be close to that of the substrate.

[0008] Preferably, a toothed rod is fixedly installed on one side of the outer surface of each of the four rolling rollers, and a toothed ring is meshed with the outer surface of each of the four toothed rods. A driven gear is fixedly installed on one side of the outer surface of each of the four toothed rings. The outer surfaces of each pair of adjacent driven gears mesh with each other. Rolling motors are installed on both sides of the outer surface of the pretreatment box through auxiliary plates. A driving gear is fixedly installed at the output end of each of the two rolling motors. The outer surfaces of the two driving gears mesh with the outer surfaces of two of the driven gears respectively.

[0009] Preferably, a temperature plate is fixedly installed on the top of each of the two U-shaped focusing induction coils, a mounting bracket is fixedly installed on the top of each of the two temperature plates, an infrared thermometer is fixedly installed on the top surface inside each of the two mounting brackets, and the two mounting brackets are respectively installed on the rear surface of the top surface inside the pretreatment box by bolts.

[0010] Preferably, two I-shaped rings are fixedly installed on the outer surfaces of the two gears, and limiting rings are movably sleeved on the outer surfaces of the four I-shaped rings. Reinforcing rods are fixedly installed on the outer surfaces of the four limiting rings. A fixing plate is fixedly installed at one end of each pair of adjacent reinforcing rods. Sliding holes are opened on both sides of the top and bottom of the pretreatment box, and rotating holes are opened on both outer surfaces of the pretreatment box.

[0011] Preferably, each of the four gears has a mounting rod movably embedded inside. One end of each of the four mounting rods is fixedly connected to one end of each of the four electromagnetic rods. Each of the four gears has a support bearing inside. The outer surfaces of the four mounting rods are fixedly mounted on the inner walls of the four support bearings. The outer surfaces of the other ends of the four mounting rods are fixedly mounted with a fixing frame. The outer surfaces of the four fixing frames are fixedly mounted with a reinforcing plate. One side of the outer surface of each of the four reinforcing plates is fixedly mounted on the outer surface of the four fixing plates.

[0012] Preferably, a limiting cylinder is fixedly installed on the other side of the outer surface of each of the four gear rings, and one side of the outer surface of each of the four limiting cylinders is fixedly connected to one side of the outer surface of each of the four driven gears. The outer surfaces of the four limiting cylinders are movably embedded in the interior of the rotating hole, and the outer surfaces of the four reinforcing rods are movably embedded in the interior of the four sliding holes. The four fixing plates are respectively installed on both sides of the top and bottom of the pretreatment box by bolts.

[0013] Preferably, the impurity removal component includes two rotating rods, each with a silicone adhesive roller fixedly mounted on its outer surface, and a connecting gear fixedly mounted at both ends of each rotating rod. The outer surfaces of the four connecting gears are all meshed with toothed belts.

[0014] Preferably, all four toothed belts are internally connected to ring gears, and the outer surfaces of the two silicone adhesive rollers are provided with scraping frames. A T-shaped frame is fixedly installed on one side of the outer surface of the two scraping frames, and the T-shaped frame is installed on one side of the outer surface of the pretreatment box by bolts.

[0015] Preferably, two mounting holes are provided on both outer surfaces of the pretreatment box, annular grooves are provided on the outer surfaces of the four driven gears, the outer surfaces of the four annular gears are fixedly installed inside the four annular grooves, the outer surfaces of the four toothed belts are movably embedded inside the four annular grooves, the outer surfaces of the two scraping frames are movably embedded inside the four mounting holes, and the two ends of the two rotating rods movably extend through to the outer surfaces of both sides of the pretreatment box.

[0016] Preferably, the shearing assembly includes a frame and a drive mechanism. The output end of the drive mechanism is provided with a transmission mechanism. Both output ends of the transmission mechanism are provided with cutter shafts. The outer surfaces of the two cutter shafts are provided with multiple shearing discs and multiple spacers. The pretreatment box is mounted on the front surface of the frame by a reinforcing plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In use, the invention involves activating the electromagnetic rod and the rolling motor. The rolling motor drives the drive gear to rotate, which in turn drives two driven gears to rotate in opposite directions. These gears, through a gear ring, drive two toothed rods to rotate, further rotating the upper and lower rolling rollers to electromagnetically roll the two sides of the cold-rolled steel sheet. Combined with an eddy current sensor and a PLC controller, the magnetic field force is intelligently and dynamically adjusted according to the edge conditions of different hardness levels, achieving "flexible de-hardening." Next, a U-shaped focusing induction coil is activated to achieve rapid localized heating of the hardened layer, restoring its hardness to near that of the substrate, thus eliminating work hardening. Under the action of the de-hardening components, the surface hardened layer is flexibly treated first with electromagnetic rolling, followed by localized heating to soften the deeper hardened layer. This combination achieves "full-thickness softening." Furthermore, the hardened layer structure is more uniform after rolling, and the temperature field distribution during electromagnetic heating is more stable, adapting to high-speed shearing and avoiding edge quality fluctuations caused by uneven heating.

[0019] 2. In use, the bolts are removed, the fixing plate is moved, and the reinforcing rod and fixing frame are moved. The reinforcing rod moves the limiting ring and I-shaped ring together, which in turn moves the mounting rod, electromagnetic rod, toothed rod, and rolling roller simultaneously. This reduces the distance between the left and right rolling rollers, making it suitable for de-hardening treatment of narrow cold-rolled steel sheets. Then, the U-shaped focusing induction coil is moved to a different position. With the adjustable structure, the positions of the rolling rollers and the U-shaped focusing induction coil can be moved to accommodate cold-rolled steel sheets of different widths for de-hardening treatment, improving the flexibility and applicability of the de-hardening assembly.

[0020] 3. In use, the driven gear drives the ring gear to rotate, which in turn drives the connecting gear to rotate via a toothed belt. This further drives the rotating rod and the silicone adhesive roller to rotate, adsorbing impurities on the steel plate surface and improving the cleanliness of the steel plate surface. Impurities on the surface of the silicone adhesive roller are then cleaned by a scraper frame. Attached Figure Description

[0021] Figure 1 This is a first-angle perspective view of a high-speed slitting device for cold-rolled steel sheets according to the present invention.

[0022] Figure 2 This is a second perspective view of a high-speed slitting device for cold-rolled steel sheets according to the present invention.

[0023] Figure 3 This is a schematic diagram of the shearing disc in a high-speed longitudinal shearing and slitting device for cold-rolled steel sheets according to the present invention;

[0024] Figure 4 This is a schematic diagram of the pretreatment box in a high-speed slitting device for cold-rolled steel sheets according to the present invention;

[0025] Figure 5 This is a schematic diagram of the U-shaped focusing induction coil in a high-speed slitting device for cold-rolled steel sheets according to the present invention;

[0026] Figure 6 This is a three-dimensional cross-sectional view of the pretreatment box in a high-speed slitting device for cold-rolled steel sheets according to the present invention.

[0027] Figure 7 This is a schematic diagram showing the structure of the impurity removal component in a high-speed slitting device for cold-rolled steel sheets according to the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the silicone adhesive roller in a high-speed slitting device for cold-rolled steel sheets according to the present invention;

[0029] Figure 9 This is a schematic diagram of the dehardening component in a high-speed slitting device for cold-rolled steel sheets according to the present invention;

[0030] Figure 10 This is a cross-sectional schematic diagram of the sliding hole structure in a high-speed longitudinal shearing and slitting device for cold-rolled steel sheets according to the present invention;

[0031] Figure 11 This is a schematic diagram of the ring gear in a high-speed slitting device for cold-rolled steel sheets according to the present invention;

[0032] Figure 12 This is a cross-sectional schematic diagram of the structure of the rolling roller in a high-speed longitudinal shearing and slitting device for cold-rolled steel sheets according to the present invention.

[0033] In the picture:

[0034] 1. Shearing assembly; 101. Frame; 102. Drive mechanism; 103. Transmission mechanism; 104. Cutter shaft; 105. Shearing disc; 106. Spacer; 2. De-hardening assembly; 201. U-shaped focusing induction coil; 202. Temperature plate; 203. Mounting bracket; 204. Infrared thermometer; 205. Roller; 206. Gear rack; 207. Gear ring; 208. Driven gear; 209. Roller motor; 210. Drive gear; 211. Limiting cylinder; 212. I-shaped ring; 213. Limiting ring; 21 4. Fixing plate; 215. Mounting rod; 216. Fixing frame; 217. Annular groove; 218. Electromagnetic rod; 219. Support bearing; 220. Eddy current sensor; 221. Reinforcing rod; 222. Reinforcing plate; 3. Impurity removal assembly; 301. Rotating rod; 302. Silicone adhesive roller; 303. Connecting gear; 304. Toothed belt; 305. Impurity scraping frame; 306. T-shaped frame; 307. Ring gear; 4. Pretreatment box; 5. PLC controller; 6. Sliding hole; 7. Detection hole; 8. Rotating hole; 9. Mounting hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-12As shown, the present invention provides a technical solution: a high-speed slitting device for cold-rolled steel sheets, comprising a shearing assembly 1 for cutting cold-rolled steel sheet coils, a pretreatment box 4 disposed on the front surface of the shearing assembly 1, and de-hardening assemblies 2 disposed on both outer surfaces of the pretreatment box 4 for treating the hardened layer on both sides of the cold-rolled steel sheet coil, and a removal assembly 3 disposed inside the pretreatment box 4 for removing impurities from the upper and lower surfaces of the cold-rolled steel sheet coil, and a PLC controller 5 fixedly mounted on the top of the pretreatment box 4; both de-hardening assemblies 2 include U-shaped focusing induction coils 201, and two rolling rollers 205 disposed on the front surface of both U-shaped focusing induction coils 201, and electromagnetic rods 218 disposed inside the four rolling rollers 205, and the front surface of both outer surfaces of the pretreatment box 4... Each of the four rollers 205 has a detection hole 7, and two detection holes 7 are equipped with eddy current sensors 220. The two eddy current sensors 220 are used to detect the hardening degree of both sides of the cold-rolled steel strip. The PLC controller 5 intelligently adjusts the magnetic field strength of the electromagnetic rod 218 according to the hardening data. The rolling rollers 205 are responsible for rolling the upper and lower surfaces of both sides of the cold-rolled steel strip to initially eliminate work hardening. The U-shaped focusing induction coil 201 is responsible for heating the hardened layer so that the hardness of the hardened layer is restored to close to that of the substrate. A toothed bar 206 is fixedly installed on one side of the outer surface of each of the four rolling rollers 205. A toothed ring 207 is meshed on the outer surface of each of the four toothed bars 206. A driven gear 208 is fixedly installed on one side of the outer surface of each of the four toothed rings 207. Each pair of adjacent driven gears The outer surfaces of the two gears 208 mesh with each other. Rolling motors 209 are mounted on both outer surfaces of the pretreatment box 4 via auxiliary plates. Drive gears 210 are fixedly mounted on the output ends of the two rolling motors 209. The outer surfaces of the two drive gears 210 mesh with the outer surfaces of the two driven gears 208 respectively. Temperature plates 202 are fixedly mounted on the tops of the two U-shaped focusing induction coils 201. Mounting brackets 203 are fixedly mounted on the tops of the two temperature plates 202. Infrared thermometers 204 are fixedly mounted on the top surfaces inside the two mounting brackets 203. The two mounting brackets 203 are respectively bolted to the rear surface of the top surface inside the pretreatment box 4. Two I-shaped rings 212 are fixedly mounted on the outer surfaces of the two gear racks 206. Four I-shaped rings... Each of the four limit rings 213 is movably fitted onto the outer surface of the pretreatment box 4. Each of the four limit rings 213 has a reinforcing rod 221 fixedly installed on its outer surface. A fixing plate 214 is fixedly installed at one end of each pair of adjacent reinforcing rods 221. Sliding holes 6 are provided on both sides of the top and bottom of the pretreatment box 4. Rotating holes 8 are provided on both sides of the outer surface of the pretreatment box 4. Mounting rods 215 are movably embedded inside each of the four gear rods 206. One end of each mounting rod 215 is fixedly connected to one end of each of the four electromagnetic rods 218. Support bearings 219 are provided inside each of the four gear rods 206. The outer surfaces of the four mounting rods 215 are fixedly installed on the inner walls of the four support bearings 219. A fixing bracket 216 is fixedly installed on the outer surface of the other end of each of the four mounting rods 215.Reinforcing plates 222 are fixedly installed on the outer surfaces of the four fixed brackets 216. One side of the outer surface of each of the four reinforcing plates 222 is fixedly installed on the outer surface of the four fixed plates 214. Limiting sleeves 211 are fixedly installed on the other side of the outer surfaces of the four gear rings 207. One side of the outer surface of each of the four limiting sleeves 211 is fixedly connected to one side of the outer surface of each of the four driven gears 208. The outer surfaces of the four limiting sleeves 211 are movably embedded inside the rotating holes 8. The outer surfaces of the four reinforcing rods 221 are movably embedded inside the four sliding holes 6. The four fixed plates 214 are respectively bolted to the top and bottom sides of the pretreatment box 4.

[0037] In this embodiment, during use, the U-shaped focusing induction coil 201, infrared thermometer 204, rolling motor 209, electromagnetic rod 218, eddy current sensor 220, and PLC controller 5 are electrically connected. Rolling rollers 205 are installed vertically on both sides inside the pretreatment box 4, with two vertically opposite rolling rollers 205 forming a group, for a total of two groups. The cold-rolled steel sheet coil is unwound by the uncoiling mechanism, and the tension and position of the coil are adjusted by the tension adjustment mechanism. Finally, it is conveyed to the pretreatment box 4 by the guiding mechanism, and then passes through the space between two sets of rolling rollers 205, the space between two silicone adhesive rollers 302 and the space inside two U-shaped focusing induction coils 201. After exiting from the outlet at the rear of the pretreatment box 4, it passes between the upper and lower sets of shearing discs 105. The hardened layer on both sides of the cold-rolled steel sheet is subjected to electromagnetic rolling and heat treatment by the de-hardening component 2 to remove the hardening. Then, the impurity removal component 3 cleans the impurities on the upper and lower parts of the cold-rolled steel sheet. Finally, it is slitting into strips by the shearing component 1. The tension of the multiple narrow strips after shearing is adjusted by the tension control mechanism, and then they are wound up by the winding mechanism. During the hardening removal process, the rolling motor 209 and the electromagnetic rod 218 are first started. The output end of the rolling motor 209 drives the driving gear 210 to rotate, which in turn drives the driven gear 208 below it to rotate, causing the driven gear 208 above to rotate in the opposite direction. Figure 9As shown, the lower driven gear 208 rotates counterclockwise, and the upper driven gear 208 rotates clockwise. This drives the two gear rings 207 to rotate in the opposite direction, and simultaneously drives the two limiting cylinders 211 to rotate in the opposite direction inside the corresponding rotating holes 8. The gear rings 207 are meshed with the gear racks 206. The rotation of the gear rings 207 drives the two gear racks 206 to rotate on the outer surface of the corresponding mounting rods 215, and simultaneously drives the I-shaped rings 212 to rotate in the limiting rings 213. The gear racks 206 further drive the two rolling rollers 205 to rotate on the outer surface of the corresponding electromagnetic rods 218, thereby causing the upper and lower rolling rollers 205 to rotate and roll the two sides of the cold-rolled steel sheet. When the mechanical force of rolling applies radial pressure to the edge hardened layer, the residual stress inside the hardened layer is released, the broken grains slip and recombine, and some dislocations annihilate, thereby reducing the hardness. At the same time, the plastic deformation generated by rolling can make the thickness of the hardened layer uniform, which is beneficial to reduce the energy consumption of subsequent high-frequency induction heating and lays the foundation for heating "uniform softening". During the rolling process, the electromagnetic rod 218 generates a magnetic field. The cold-rolled steel sheet exhibits magnetostriction in this field, causing the crystal lattice of the edge hardened layer to slip and recombine more easily under the influence of the magnetic field, accelerating dislocation annihilation. Furthermore, the magnetic field promotes the uniform release of stress within the hardened layer, avoiding "localized hardening residue" caused by uneven grain distribution during simple mechanical rolling. In addition, the eddy current sensor 220 detects the degree of hardening in the hardened layer and transmits the detected hardening data to the PLC controller 5 via electrical signals for analysis and identification. Based on a set threshold range, the current of the electromagnetic rod 218 is adjusted in real time, thereby regulating the magnetic field strength. This intelligent and dynamic adjustment of the magnetic field force according to the edge conditions of different hardness levels achieves "flexible de-hardening," avoiding performance damage caused by over-processing of low-hardness edges. After the hardening degree is reduced by electromagnetic rolling, the steel sheet reaches the U-shaped focusing induction coil 201. The U-shaped focusing induction coil 201 is activated in advance, and a high-frequency current passes through it, generating an alternating magnetic field. Eddy currents are generated in the hardened layer at the edge of the cold-rolled steel sheet due to electromagnetic induction, and the eddy current energy is concentrated on the surface (i.e., the "skin effect"), achieving rapid localized heating of the hardened layer. Temperature changes are monitored in real time by an infrared thermometer 204. When heated to a certain temperature, the broken grains inside the hardened layer will recover and recrystallize, the dislocation density decreases, and the hardness recovers to near that of the matrix, thus eliminating work hardening. The de-hardened cold-rolled steel sheet then enters the upper and lower sets of shearing discs 105. The drive mechanism 102 provides power, and the transmission mechanism 103 drives the two cutter shafts 104 to rotate, which in turn drives the multiple shearing discs 105 to rotate, performing longitudinal shearing and slitting of the steel strip. This greatly reduces wear on the blades, prevents blade breakage due to the hardened edge layer, and results in a smoother shearing surface, improving blade life and the longitudinal shearing effect of the cold-rolled steel sheet.Under the action of the de-hardening component 2, the surface hardened layer is first treated by electromagnetic rolling, and then the deep hardened layer is treated by local heating. The combination of the two achieves "full thickness softening". In addition, the hardened layer structure is more uniform after rolling, and the temperature field distribution is more stable during electromagnetic heating, which is suitable for high-speed shearing and avoids edge quality fluctuations caused by uneven heating. This solves the problem that when cold-rolled steel plates enter the slitting machine for high-speed shearing, the hardened layer on both sides of the plate is more brittle. During shearing, instantaneous impact loads are easily generated, which can easily cause micro-cracks on the blade edge, producing "serrated edges". This not only reduces the blade life and requires multiple machine stops to replace the blade, reducing work efficiency, but also causes burrs at the narrow strip shearing point, affecting the slitting effect.

[0038] The rolling roller 205 is made of a non-ferromagnetic alloy, such as aluminum-magnesium alloy. This material has low magnetic permeability and does not form magnetic shielding, ensuring that the magnetic field generated by the electromagnetic rod 218 effectively acts on the hardened layer at the edge of the cold-rolled steel plate. The inner wall of the rolling roller 205 is coated with an oxide-based ceramic coating, which has low thermal conductivity, high electrical insulation strength, and strong high-temperature resistance, forming an insulating and heat-insulating layer on the inner wall of the rolling roller 205. During the operation of the electromagnetic rod 218, the current frequency (50-100kHz) of the electromagnetic rod 218 is precisely adjusted by the PLC controller 5. Combined with the internal insulating and heat-insulating layer design of the rolling roller 205, the energy loss caused by the eddy current effect can be significantly reduced. The measured effective magnetic field utilization rate is over 85%, fully meeting the technical requirements. In addition, the electromagnetic rod 218 adopts an axial magnetization structure, and the magnetic field strength is distributed with radial attenuation. Combined with the arc-shaped working surface of the rolling roller 205, the magnetic field is mainly concentrated on the hardened layer area of ​​5-10mm on both sides of the steel plate. The magnetic field strength in the middle of the steel plate is only less than 15% of that at the edge, and will not have a substantial impact on the central lattice structure.

[0039] Further, remove the bolts between the fixing plate 214 and the pretreatment box 4, and then push the fixing plate 214 towards the sliding hole 6, causing the reinforcing rod 221 and the fixing frame 216 to move together. The reinforcing rod 221 drives the limiting ring 213 and the I-shaped ring 212 to move together, which in turn drives the mounting rod 215, the electromagnetic rod 218, the toothed rod 206, and the rolling roller 205 to move simultaneously. During this process, the toothed rod 206 slides inside the toothed ring 207. By moving the rolling roller 205, the distance between the left and right rolling rollers 205 can be reduced, adapting to the de-hardening treatment of cold-rolled steel sheets with smaller widths. Next, remove the fixing bolts of the mounting frame 203, and move the U-shaped focusing induction coil 201 to correspond to the position of the rolling roller 205, adapting to cold-rolled steel sheets of different widths. Under the action of the adjustable structure, the positions of the rolling roller 205 and the U-shaped focusing induction coil 201 can be moved to adapt to cold-rolled steel sheets of different widths for de-hardening treatment, thereby improving the flexibility and applicability of the de-hardening component 2.

[0040] Example 2: Figures 5-8 As shown, the impurity removal component 3 includes two rotating rods 301. Silicone adhesive rollers 302 are fixedly mounted on the outer surfaces of both rotating rods 301. Connecting gears 303 are fixedly mounted at both ends of the two rotating rods 301. Toothed belts 304 are meshed on the outer surfaces of the four connecting gears 303. Ring gears 307 are meshed inside the four toothed belts 304. Scraping frames 305 are provided on the outer surfaces of both silicone adhesive rollers 302. T-shaped frames 306 are fixedly mounted on one side of the outer surface of the two scraping frames 305. The T-shaped frames 306 are bolted to one side of the outer surface of the pretreatment box 4. Two mounting holes 9 are provided on both sides of the outer surface of the pretreatment box 4. Annular grooves 217 are provided on the outer surfaces of the four driven gears 208. The outer surfaces of the four ring gears 307 are fixedly installed inside the four ring grooves 217, the outer surfaces of the four toothed belts 304 are movably embedded inside the four ring grooves 217, the outer surfaces of the two scraping frames 305 are movably embedded inside the four mounting holes 9, and the two ends of the two rotating rods 301 are movably extended to the outer surfaces of the two sides of the pretreatment box 4. The shearing assembly 1 includes a frame 101 and a drive mechanism 102. The output end of the drive mechanism 102 is provided with a transmission mechanism 103. Both output ends of the transmission mechanism 103 are provided with cutter shafts 104. The outer surfaces of the two cutter shafts 104 are provided with multiple shearing discs 105 and multiple spacers 106. The pretreatment box 4 is installed on the front surface of the frame 101 by a reinforcing plate.

[0041] In this embodiment, during use, when the hardening component 2 is activated and the hardened layer is electromagnetically rolled, the rotation of the two driven gears 208 drives the two ring gears 307 to rotate together. This, in turn, drives the connecting gear 303 to rotate via the toothed belt 304, further driving the rotating rod 301 to rotate, thus achieving the rotation of the silicone adhesive roller 302. The surface of the silicone adhesive roller 302 has high viscosity. When the cold-rolled steel sheet moves, it will slightly contact the silicone adhesive roller 302, adsorbing impurities on the steel sheet surface through intermolecular forces, improving the surface cleanliness of the steel sheet, and reducing subsequent friction between impurities and the shearing disc 105, which could damage the shearing disc 105 and reduce its service life. A scraping frame 305 is provided below the rotation direction of the two silicone adhesive rollers 302. Both scraping frames 305 have inclined sharp-angle scraping surfaces near the silicone adhesive rollers 302. Figure 8 As shown, when impurities adhere to the silicone adhesive roller 302, it rotates to the scraper frame 305 and is scraped off at the sharp corner of the scraper frame 305, falling into the scraper frame 305, thus cleaning the silicone adhesive roller 302. Removing the bolts at the T-shaped bracket 306 allows the two scraper frames 305 to be pulled out from the mounting hole 9 to clean the collected impurities without affecting the subsequent use of the scraper frames 305.

[0042] The overall mechanism works as follows: The rolling motor 209 and electromagnetic rod 218 are activated. The rolling motor 209 drives the drive gear 210 to rotate, which in turn drives the driven gear 208 below to rotate, causing the driven gear 208 above to rotate in the opposite direction. This, in turn, drives the two gear rings 207 to rotate in the opposite direction, causing the two gear racks 206 to rotate on the outer surface of the corresponding mounting rod 215. This further drives the rolling roller 205 to rotate, rolling the two sides of the cold-rolled steel sheet and reducing the surface hardness. Simultaneously, the electromagnetic rod 218 generates a magnetic field. Under the influence of the magnetic field, the lattice of the edge hardened layer is more prone to slippage and recombination, accelerating dislocation annihilation and promoting the uniform release of internal stress in the hardened layer. In conjunction with the eddy current sensor 220, the hardening degree of the hardened layer is detected, and the detected hardening data is transmitted to the PLC controller 5 via electrical signals for analysis and identification. Based on the set threshold range, the current of the electromagnetic rod 218 is adjusted in real time, thereby regulating the magnetic field strength. The rotation of the two driven gears 208 drives the two ring gears 307 to rotate together, which in turn drives the connecting gear 303 to rotate via the toothed belt 304. This further drives the rotation of the rotating rod 301 and the silicone adhesive roller 302, adhering away impurities on the steel plate surface and improving the cleanliness of the steel plate surface. The U-shaped focusing induction coil 201 is activated to rapidly heat the hardened layer locally. The temperature change is monitored in real time by the infrared thermometer 204. When the temperature reaches a certain level, the hardness recovers to be close to that of the substrate, thus eliminating work hardening. The de-hardened cold-rolled steel plate then enters the upper and lower sets of shearing discs 105. The drive mechanism 102 provides power, and the transmission mechanism 103 drives the two cutter shafts 104 to rotate, which in turn drives the multiple shearing discs 105 to rotate, performing longitudinal shearing and slitting of the steel strip. The bolts between the fixing plate 214 and the pretreatment box 4 are removed, and then the fixing plate 214 is pushed to move, causing the reinforcing rod 221 and the fixing frame 216 to move together. The reinforcing rod 221 moves the limiting ring 213 and the I-shaped ring 212 together, which in turn moves the mounting rod 215, the electromagnetic rod 218, the toothed rod 206, and the rolling roller 205 simultaneously, reducing the distance between the left and right rolling rollers 205. Next, the fixing bolts of the mounting bracket 203 are removed, and the U-shaped focusing induction coil 201 is moved to align with the rolling roller 205, adapting to cold-rolled steel sheets of different widths. When impurities adhere to the silicone adhesive roller 302, it rotates to the scraping frame 305 and is scraped off at the sharp corner of the scraping frame 305, falling into the scraping frame 305. The bolts at the T-shaped bracket 306 are then removed, allowing the two scraping frames 305 to be pulled out of the mounting hole 9 to clean the impurities.

[0043] Among them, the drive mechanism 102, transmission mechanism 103, U-shaped focusing induction coil 201, infrared thermometer 204, rolling motor 209, electromagnetic rod 218, eddy current sensor 220 and PLC controller 5 are all existing technologies, and their components and operating principles are all publicly available technologies, which will not be explained in detail here.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-speed slitting device for cold-rolled steel sheets, comprising a shearing assembly (1) for cutting cold-rolled steel sheet coils, characterized in that: The front surface of the shearing assembly (1) is provided with a pretreatment box (4), and both outer surfaces of the pretreatment box (4) are provided with a de-hardening assembly (2) for treating the hardened layer on both sides of the cold-rolled steel sheet coil. The interior of the pretreatment box (4) is provided with a cleaning assembly (3) for removing impurities from the upper and lower surfaces of the cold-rolled steel sheet coil. A PLC controller (5) is fixedly installed on the top of the pretreatment box (4). Both of the de-hardening components (2) include U-shaped focusing induction coils (201). Two rolling rollers (205) are provided on the front surface of the two U-shaped focusing induction coils (201). Electromagnetic rods (218) are provided inside the four rolling rollers (205). Detection holes (7) are provided on the front surface of the outer surfaces on both sides of the pretreatment box (4). Eddy current sensors (220) are provided inside the two detection holes (7). The two eddy current sensors (220) are used to detect the hardening degree on both sides of the cold-rolled steel strip. The PLC controller (5) intelligently adjusts the magnetic field strength of the electromagnetic rods (218) according to the hardening data. The rolling rollers (205) are responsible for rolling the upper and lower surfaces of the cold-rolled steel plate to initially eliminate work hardening. The U-shaped focusing induction coils (201) are responsible for heating the hardened layer so that the hardness of the hardened layer is restored to close to that of the substrate. The rolling roller (205) is made of a non-ferromagnetic alloy material, which will not form a magnetic shield, and can ensure that the magnetic field generated by the electromagnetic rod (218) can effectively act on the hardened layer at the edge of the cold-rolled steel plate.

2. The high-speed slitting device for cold-rolled steel sheets according to claim 1, characterized in that: A rack (206) is fixedly installed on one side of each of the four rolling rollers (205). A gear ring (207) is meshed with the outer surface of each of the four racks (206). A driven gear (208) is fixedly installed on one side of the outer surface of each of the four gear rings (207). The outer surfaces of each pair of driven gears (208) mesh with each other. Rolling motors (209) are installed on both sides of the pretreatment box (4) through auxiliary plates. A drive gear (210) is fixedly installed at the output end of each of the two rolling motors (209). The outer surfaces of the two drive gears (210) mesh with the outer surfaces of the two driven gears (208) respectively.

3. The high-speed slitting device for cold-rolled steel sheets according to claim 2, characterized in that: Temperature plates (202) are fixedly installed on the top of the two U-shaped focusing induction coils (201), and mounting brackets (203) are fixedly installed on the top of the two temperature plates (202). Infrared thermometers (204) are fixedly installed on the top surface inside the two mounting brackets (203). The two mounting brackets (203) are respectively installed on the rear surface of the top surface inside the pretreatment box (4) by bolts.

4. The high-speed slitting device for cold-rolled steel sheets according to claim 3, characterized in that: Two I-shaped rings (212) are fixedly installed on the outer surface of each of the four gears (206). The outer surface of the I-shaped rings (212) is provided with an annular groove. The outer surface of the multiple I-shaped rings (212) is movably fitted with limiting rings (213) through the annular groove. The outer surface of the multiple limiting rings (213) is fixedly installed with reinforcing rods (221). One end of each pair of adjacent reinforcing rods (221) is fixedly installed with a fixing plate (214). The top and bottom sides of the pretreatment box (4) are provided with sliding holes (6). The outer surfaces of both sides of the pretreatment box (4) are provided with rotating holes (8).

5. The high-speed slitting device for cold-rolled steel sheets according to claim 4, characterized in that: Each of the four gears (206) has a mounting rod (215) movably embedded inside. One end of each of the four mounting rods (215) is fixedly connected to one end of each of the four electromagnetic rods (218). Each of the four gears (206) has a support bearing (219) inside. The outer surfaces of the four mounting rods (215) are fixedly mounted on the inner walls of the four support bearings (219). The outer surfaces of the other ends of the four mounting rods (215) are fixedly mounted with a fixing frame (216). The outer surfaces of the four fixing frames (216) are fixedly mounted with a reinforcing plate (222). One side of the outer surface of the four reinforcing plates (222) is fixedly mounted on the outer surface of the four fixing plates (214).

6. The high-speed slitting device for cold-rolled steel sheets according to claim 5, characterized in that: Limiting sleeves (211) are fixedly installed on the other side of the outer surface of the four gear rings (207). The outer surface of one side of the four limiting sleeves (211) is fixedly connected to the outer surface of one side of the four driven gears (208). The outer surfaces of the four limiting sleeves (211) are movably embedded in the inside of the rotating hole (8). The outer surfaces of the four reinforcing rods (221) are movably embedded in the inside of the four sliding holes (6). The four fixing plates (214) are respectively installed on both sides of the top and bottom of the pretreatment box (4) by bolts.

7. The high-speed slitting device for cold-rolled steel sheets according to claim 6, characterized in that: The impurity removal component (3) includes two rotating rods (301), and silicone adhesive rollers (302) are fixedly installed on the outer surfaces of the two rotating rods (301). Connecting gears (303) are fixedly installed at both ends of the two rotating rods (301), and toothed belts (304) are meshed on the outer surfaces of the four connecting gears (303).

8. The high-speed slitting device for cold-rolled steel sheets according to claim 7, characterized in that: The four toothed belts (304) are all internally connected to ring gears (307), and the outer surfaces of the two silicone adhesive rollers (302) are provided with scraping frames (305). A T-shaped frame (306) is fixedly installed on one side of the outer surface of the two scraping frames (305). The T-shaped frame (306) is installed on one side of the outer surface of the pretreatment box (4) by bolts.

9. The high-speed slitting device for cold-rolled steel sheets according to claim 8, characterized in that: The pretreatment box (4) has two mounting holes (9) on both outer surfaces. The outer surfaces of the four driven gears (208) are provided with annular grooves (217). The inner surfaces of the four annular gears (307) are fixedly installed inside the four annular grooves (217). The outer surfaces of the four toothed belts (304) are movably embedded inside the four annular grooves (217). The outer surfaces of the two scraping frames (305) are movably embedded inside the four mounting holes (9). The two ends of the two rotating rods (301) movably penetrate to the outer surfaces of both sides of the pretreatment box (4).

10. The high-speed slitting device for cold-rolled steel sheets according to claim 1, characterized in that: The shearing assembly (1) includes a frame (101) and a drive mechanism (102). The output end of the drive mechanism (102) is provided with a transmission mechanism (103). Both output ends of the transmission mechanism (103) are provided with cutter shafts (104). The outer surfaces of the two cutter shafts (104) are provided with multiple shearing discs (105) and multiple spacers (106). The pretreatment box (4) is mounted on the front surface of the frame (101) by a reinforcing plate.

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