A cold-rolled sheet safe uncoiler

Abstract

The present application relates to the field of metal processing, and particularly relates to a cold-rolled plate safety uncoiler, which comprises an uncoiling base, an uncoiler and a reel shaft, further comprises a connecting frame, a blocking rod, a feeding mechanism, a cutting mechanism and a protection assembly, the connecting frame is connected to the uncoiling base, the blocking rod is connected to the left and right sides of the connecting frame, the end of the blocking rod is connected to the uncoiler, the feeding mechanism for conveying the steel coil is arranged on the uncoiling base, the cutting mechanism for cutting the plastic film is installed at the bottom of the connecting frame, and the protection assembly for preventing the steel coil from being scattered is arranged on the connecting frame and the blocking rod. The guardrails in the protection assembly are automatically unfolded during the movement of the steel coil, and the left and right sides of the steel coil are shielded, so that the steel coil is prevented from bouncing after being released from the restriction, the curved top plate provided with the torsional spring ensures that the contact plate can be separated from the steel coil when the steel coil is sleeved on the reel shaft, and the contact plate is rebounded through the reset spring, so that the contact plate can scrape off the plastic film during the resetting process, thereby realizing automatic uncoiling.

Description

Technical Field

[0001] This invention relates to the field of metal processing, and more particularly to a safe uncoiling machine for cold-rolled steel sheets. Background Technology

[0002] Steel coils, as rolled steel products, are an indispensable raw material in industrial production. Steel coils are typically produced from hot-rolled steel coils through further processing, with cold rolling being a crucial step in this process. Cold rolling involves using hot-rolled steel coils as raw material, pickling to remove oxide scale, and then continuously cold-deforming and rolling them to obtain hardened coils. Due to work hardening, these hardened coils exhibit increased strength and hardness, while their toughness and plasticity decrease, making them suitable for manufacturing parts that do not require complex deformation. The cold rolling production process generally includes raw material preparation, pickling, rolling, degreasing, annealing, and finishing. This process demands high precision and high quality to ensure the performance of the final product.

[0003] In the existing steel coil uncoiling process, the uncoiler plays a crucial role. However, the operation of many uncoilers remains relatively traditional. Specifically, when a steel coil is transported to the vicinity of the uncoiler, the operator typically uses a forklift to directly align the coil and load it onto the uncoiler's drum. While this process is simple and straightforward, it presents several inconveniences. The outer plastic film of the coil is overlooked in this step and needs to be manually or mechanically cut during the subsequent uncoiling process. This not only increases the number of steps but may also affect uncoiling efficiency and coil quality.

[0004] However, the problems with the existing uncoiling process are not limited to the coiling and plastic film handling. In particular, after the steel coil is released from its restraints, i.e. the plastic film is cut and the pressure rollers are loosened, the steel coil will suddenly spring open due to the elastic potential energy after bending. This not only poses a safety hazard to the equipment and operators, but may also cause scratches and deformation on the surface of the steel coil. Summary of the Invention

[0005] To overcome the drawbacks of low uncoiling efficiency and potential safety hazards, this invention provides an automated and safe uncoiling machine for cold-rolled steel sheets.

[0006] A cold-rolled steel sheet safety uncoiler includes an uncoiler base, an uncoiler, and a coil shaft. The uncoiler is mounted on the uncoiler base, and the uncoiler is equipped with a coil shaft for placing steel coils. The uncoiler also includes a connecting frame, a stop bar, a feeding mechanism, a cutting mechanism, and protective components. The connecting frame is connected to the uncoiler base, and stop bars are connected to the left and right sides of the connecting frame. The ends of the stop bars are connected to the uncoiler. The uncoiler base is provided with a feeding mechanism for conveying steel coils. The bottom of the connecting frame is equipped with a cutting mechanism for cutting the plastic film wrapping the steel coils. Protective components are provided on the connecting frame and the stop bars to prevent the steel coils from unraveling.

[0007] To further explain, the feeding mechanism includes a movable base, wheels, an adjustment component, and a placement plate. Several wheels are installed on both sides of the movable base, and the uncoiling base has grooves in which the wheels move. An adjustment component is provided on the movable base, and a placement plate for supporting the steel coil is provided on the adjustment component. The adjustment component is used to adjust the height of the placement plate, thereby adjusting the height of the steel coil.

[0008] To further explain, the adjustment assembly includes a servo motor, a bidirectional threaded screw, a guide rod, a connecting sleeve, a connecting block, and a connecting rod. The servo motor is mounted on the movable base. The bidirectional threaded screw is rotatably connected to the front top of the movable base, and the guide rod is fixedly connected to the rear top. The servo motor is connected to one end of the bidirectional threaded screw. Two connecting sleeves are threadedly connected to the bidirectional threaded screw, and two connecting sleeves are slidably connected to the guide rod. A connecting block is rotatably connected to the top of the connecting sleeve. The tops of all connecting blocks are rotatably connected to the placement plate. A connecting rod connects the connecting blocks on the bidirectional threaded screw and the guide rod that are positioned opposite each other.

[0009] To further explain, the cutting mechanism includes a mounting frame, a limiting rod, a mounting block, a first elastic element, a cutting element, and a buffer assembly. The mounting frame is connected in the middle of the connecting frame. The limiting rod is slidably connected to the top of the mounting frame. The mounting block is connected to the bottom of the limiting rod. The cutting element is installed inside the mounting block. The first elastic element is sleeved on the limiting rod. One end of the first elastic element is connected to the mounting frame, and the other end is connected to the mounting block. The mounting frame is equipped with a buffer assembly for reducing the impact of the steel coil.

[0010] To further explain, the buffer assembly includes a telescopic tube, a telescopic rod, a bending plate, and a second elastic element. The mounting frame is connected to the telescopic tube, and the telescopic rod is slidably connected inside the telescopic tube. The bottom of the telescopic rod is connected to the bending plate, and the second elastic element is sleeved on the telescopic rod. One end of the second elastic element is connected to the telescopic tube, and the other end is connected to the bending plate.

[0011] To further explain, the protective assembly includes guardrails, tension links, return springs, contact plates, and unlocking components. At least two guardrails are connected to the front side of the stop bar, and at least two guardrails are slidably connected to the rear side of the stop bar. A return spring is sleeved on the rear side of the stop bar, and a return spring is connected between two adjacent guardrails on the rear side of the stop bar. A contact plate is connected to the rearmost guardrail, and an unlocking component for squeezing the contact plate to move is provided at the rear end of the stop bar.

[0012] To further explain, the unlocking component includes a mounting frame, a third elastic element, a fixing plate, a fixing element, a curved top plate, and a torsion spring. The mounting frame is connected to the rear side of the last guardrail. The contact plate is slidably connected to the mounting frame. The third elastic element is installed inside the mounting frame. One end of the third elastic element is connected to the mounting frame, and the other end is connected to the contact plate. The last end of the stop bar is connected to the fixing plate. The fixing plate is connected to the fixing element. The curved top plate is rotatably connected to the fixing element. The contact plate has a mating hole. The curved top plate passes through the mating hole and is pressed against the contact plate. A torsion spring is sleeved on the fixing element. One end of the torsion spring is connected to the fixing element, and the other end is connected to the curved top plate.

[0013] To further explain, it also includes a buffer pad, which is provided on the front side of the contact plate.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. The steel coil is conveyed by the moving base and wheels on the feeding mechanism, while the servo motor in the adjustment component drives the bidirectional threaded screw to rotate, so that the connecting sleeve moves the placement plate up and down, thereby adjusting the height of the steel coil and making it easy for the steel coil to align with the drum shaft.

[0016] 2. The cutting mechanism automatically cuts the plastic film during the movement of the steel coil. At the same time, the bending plate and telescopic rod, together with the second elastic element, expand and buffer the plastic film on the surface of the steel coil, ensuring a smooth cutting process without damaging the steel coil, thus completing the automatic cutting function.

[0017] 2. The guardrails in the protective components automatically unfold during the movement of the steel coil, blocking the left and right sides of the steel coil to prevent it from springing open after the restriction is lifted. The curved top plate with torsion springs ensures that the contact plate can disengage from the steel coil when it is sleeved on the drum shaft. The return spring allows the plastic film to be scraped off during the return process of the contact plate, thereby achieving automated unwinding. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the specific structure of the uncoiler, winding shaft and connecting frame of the present invention.

[0020] Figure 3 This is a schematic diagram of the installation structure of the feeding mechanism of the present invention.

[0021] Figure 4 This is a schematic diagram of the installation structure of the cutting mechanism of the present invention.

[0022] Figure 5 This is a schematic diagram of the installation structure of the protective component of the present invention.

[0023] Figure 6 This is a side view of the protective component of the present invention.

[0024] Figure 7 This is a schematic diagram of the connection structure of the contact plate, mounting frame and curved top plate of the present invention.

[0025] Figure 8 This is a schematic diagram of the connection structure between the torsion spring and the buffer pad of the present invention.

[0026] In the attached diagrams: 1: Uncoiling base, 11: Uncoiling machine, 12: Roller shaft, 13: Connecting frame, 14: Stop bar, 2: Feeding mechanism, 21: Moving base, 22: Wheel, 23: Adjusting component, 231: Servo motor, 232: Bidirectional threaded screw, 233: Guide rod, 234: Connecting sleeve, 235: Connecting block, 236: Connecting rod, 24: Placement plate, 3: Cutting mechanism, 31: Mounting frame, 32: Limiting rod, 33: Mounting block, 34: First 35: Cutting component; 36: Buffer assembly; 361: Telescopic tube; 362: Telescopic rod; 363: Bending plate; 364: Second elastic component; 4: Protective assembly; 41: Guardrail; 42: Tension link; 43: Return spring; 44: Contact plate; 441: Docking hole; 45: Unlocking assembly; 451: Mounting frame; 452: Third elastic component; 453: Fixing plate; 454: Fixing component; 455: Bending top plate; 456: Torsion spring; 46: Buffer pad. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0028] Example: A safety uncoiling machine for cold-rolled steel sheets, such as Figures 1-8 As shown, the device includes an uncoiling base 1, an uncoiler 11, and a winding shaft 12. The uncoiler 11 is mounted on the uncoiling base 1, and the winding shaft 12 is mounted on the uncoiler 11 to support the steel coil. The device also includes a connecting frame 13, a stop bar 14, a feeding mechanism 2, a cutting mechanism 3, and a protective component 4. The connecting frame 13 is connected to the uncoiling base 1, and the stop bar 14 passes through the middle of the connecting frame 13. The end of the stop bar 14 is connected to the uncoiler 11. The feeding mechanism 2 for conveying the steel coil is provided on the uncoiling base 1. The feeding mechanism 2 mainly drives the moving base 21 to move on the uncoiling base 1 through the drive wheel 22. The bottom of the connecting frame 13 is equipped with a cutting mechanism 3 for cutting the plastic film wrapping the steel coil. The cutting mechanism 3 mainly cuts the plastic film of the steel coil through the cutting piece 35. The connecting frame 13 and the stop bar 14 are equipped with a protective component 4 to prevent the steel coil from unraveling. The protective component 4 mainly blocks the unfolded steel coil through the guardrail 41.

[0029] Workers use forklifts or other equipment to place the steel coil wrapped in plastic film onto the feeding mechanism 2. Then, the driving wheels 22 transport the steel coil, and the height of the steel coil is adjusted up and down by the adjusting component 23. As the steel coil approaches the uncoiler 11, the plastic film on top is cut by the cutting part 35 of the cutting mechanism 3. The steel coil aligns with the drum shaft 12 and is finally fitted onto the drum shaft 12. After the plastic film is completely cut, the end of the steel coil will spring outward. During the movement of the steel coil, it will push the protective component 4. The movable guardrail 41 protects the left and right sides of the steel coil, reducing the length of the steel coil that pops out, and also protecting the nearby workers. The uncoiler 11 drives the drum shaft 12 to open and fix the steel coil, and then pulls the end of the steel coil for subsequent processing.

[0030] like Figures 1-3 As shown, the feeding mechanism 2 includes a movable base 21, wheels 22, an adjusting component 23, and a placement plate 24. Multiple wheels 22 are installed on both sides of the movable base 21. The uncoiling base 1 has grooves, and the wheels 22 move within the grooves. A power device is installed inside the movable base 21 to drive the wheels 22 to rotate. An adjusting component 23 is installed on the movable base 21, and a placement plate 24 for supporting the steel coil is installed on the adjusting component 23. The adjusting component 23 is used to adjust the height of the placement plate 24, thereby adjusting the height of the steel coil so that the through hole in the middle of the steel coil is aligned with the drum shaft 11.

[0031] like Figure 3 As shown, the adjustment assembly 23 includes a servo motor 231, a bidirectional threaded screw 232, a guide rod 233, a connecting sleeve 234, a connecting block 235, and a connecting rod 236. The servo motor 231 is mounted on the movable base 21. The bidirectional threaded screw 232 is rotatably connected to the front top of the movable base 21, and the guide rod 233 is fixedly connected to the rear top of the movable base 21. The servo motor 231 is connected to one end of the bidirectional threaded screw 232, and two connecting sleeves 23 are threaded onto the bidirectional threaded screw 232. 4. Two connecting sleeves 234 are symmetrically distributed on the bidirectional threaded screw 232. Two connecting sleeves 234 are slidably connected on the guide rod 233. Connecting blocks 235 are rotatably connected to the top of the connecting sleeves 234. The tops of the four connecting blocks 235 are rotatably connected to the placement plate 24. The placement plate 24 is higher on the left and right sides and lower in the middle to make the steel coil stable. Connecting rods 236 are connected between the connecting blocks 235 on the bidirectional threaded screw 232 and the guide rod 233, which are in opposite front and rear positions, so that the front and rear connecting blocks 235 move together.

[0032] After the steel coil is placed on the placement plate 24, the drive wheel 22 drives the moving base 21 to move. According to the height of the steel coil shaft, the servo motor 231 is started. The servo motor 231 drives the bidirectional threaded screw 232 to rotate. The connecting sleeve 234, which is threaded with it, slides on the bidirectional threaded screw 232, thereby driving the placement plate 24 to move up and down through the connecting block 235. At the same time, the connecting rod 236 ensures that the connecting blocks 235 at the front and rear positions are moved synchronously to maintain the stability of the placement plate 24 and keep the steel coil in a horizontal state. Finally, the moving base 21 sends the steel coil to the drum shaft 12. Since the threads on both sides of the bidirectional threaded screw 232 are opposite, the connecting sleeves 234 move closer or further away from each other, and the placement plate 24 will not tilt. Moreover, the bidirectional threaded screw 232 and the connecting sleeve 234 are stably connected, thus ensuring stability when adjusting the height of the steel coil.

[0033] like Figure 2 and Figure 4 As shown, the cutting mechanism 3 includes a mounting frame 31, a limiting rod 32, a mounting block 33, a first elastic element 34, a cutting element 35, and a buffer assembly 36. The mounting frame 31 is connected to the bottom side of the connecting frame 13. The limiting rod 32 is slidably connected to the top of the mounting frame 31. The top of the limiting rod 32 cannot pass downward through the mounting frame 31. The mounting block 33 is connected to the bottom of the limiting rod 32. The cutting element 35 is installed in the mounting block 33. The mounting block 33 is equipped with a power device to drive the cutting element 35 to rotate, or the edge of the cutting element 35 is sharp enough to ensure the cutting effect on the plastic film. The first elastic element 34 is sleeved on the limiting rod 32. One end of the first elastic element 34 is connected to the mounting frame 31, and the other end is connected to the mounting block 33. The mounting frame 31 is equipped with a buffer assembly 36 to reduce the impact of the steel coil.

[0034] like Figure 4 As shown, the buffer assembly 36 includes a telescopic tube 361, a telescopic rod 362, a bending plate 363, and a second elastic element 364. The mounting bracket 31 is connected to the telescopic tube 361, and the telescopic rod 362 is slidably connected inside the telescopic tube 361. The bottom of the telescopic rod 362 is connected to the bending plate 363. The front and rear ends of the bending plate 363 are bent upwards, so that the contact surface with the steel coil is inclined. The second elastic element 364 is sleeved on the telescopic rod 362. One end of the second elastic element 364 is connected to the telescopic tube 361, and the other end is connected to the bending plate 363.

[0035] During the movement of the steel coil, its top contacts the bending plate 363, pressing the bending plate 363 upwards. The bending plate 363 pushes the telescopic rod 362 upwards within the telescopic tube 361, compressing the second elastic element 364. The bending plate 363 presses the plastic film on the surface of the steel coil, spreading the plastic film to both sides. Subsequently, the steel coil contacts the cutting element 35, which cuts the spread plastic film. During the compression process between the steel coil and the cutting element 35, the steel coil also pushes the cutting element 35 upwards. The mounting block 33 and the limiting rod 32 slide within the mounting frame 31, compressing the first elastic element 34 to ensure that the pressure of the cutting element 35 on the steel coil is not too great, which would cause the steel coil to be damaged. After the steel coil passes through the cutting element 35, the first elastic element 34 rebounds. Under the action of the rebound force of the first elastic element 34 and its own weight, the cutting element 35, the mounting block 33 and the limiting rod 32 return to their original positions downward. After the steel coil is separated from the bending plate 363, the rebound force of the second elastic element 364 pushes the bending plate 363 and the telescopic rod 362 to return to their original positions.

[0036] like Figures 5-8 As shown, the protective component 4 includes guardrails 41, tension rods 42, return springs 43, contact plates 44, and unlocking components 45. Four guardrails 41 are fixedly connected to the front side of the stop bar 14, and five guardrails 41 are slidably connected to the rear side of the stop bar 14. A guardrail 41 is also connected to the rear side of the connecting frame 13. A return spring 43 is connected between two adjacent guardrails 41 on the rear side of the connecting frame 13. There are five return springs 43. A contact plate 44 is connected to the guardrail 41 at the rear end. The distance between the left and right contact plates 44 is less than the diameter of the steel coil. The height of the middle of the contact plate 44 is consistent with the height of the center point of the drum shaft 11 to ensure that the steel coil can contact the contact plate 44. An unlocking component 45 for squeezing the contact plate 44 to move is provided at the rear end of the stop bar 14.

[0037] like Figures 6-8 As shown, the unlocking component 45 includes a mounting frame 451, a third elastic element 452, a fixing plate 453, a fixing element 454, a curved top plate 455, and a torsion spring 456. The mounting frame 451 is connected to the rear side of the rear guardrail 41. The contact plate 44 is slidably connected to the mounting frame 451. The third elastic element 452 is provided inside the mounting frame 451. One end of the third elastic element 452 is connected to the mounting frame 451, and the other end is connected to the contact plate 44. The rear end of the stop bar 14 is connected to the fixing plate 453. The fixing plate 453 is connected to the fixing element 454. The curved top plate 455 is rotatably connected to the fixing element 454. The contact plate 44 has a mating hole 441. The curved top plate 455 passes through the mating hole 441 and is pressed against the contact plate 44. The torsion spring 456 is sleeved on the fixing element 454. One end of the torsion spring 456 is connected to the fixing element 454, and the other end is connected to the curved top plate 455.

[0038] The rear end of the steel coil contacts the contact plate 44 after passing through the connecting frame 13, pushing the contact plate 44 to move backward. The contact plate 44 drives the mounting frame 451 and the connected guardrail 41 to move backward. The return springs 43 between the guardrails 41 keep the spacing between them uniform, so that the guardrails 41 can completely wrap around the left and right sides of the steel coil. As the steel coil moves, the contact plate 44 gradually approaches the bending top plate 455. When the steel coil is completely fitted onto the drum shaft 12, the bending top plate 455 passes through the mating hole 441 of the contact plate 44 and squeezes the contact plate 44 to slide to the left and right sides. During the sliding of the mounting frame 451, the contact plate 44 stretches the third elastic element 452 and separates from the steel coil. At this time, the stretched return spring 43 rebounds, and the connecting frame 13... The side guardrail 41 slides on the stop bar 14 and moves closer to the connecting frame 13, thereby driving the mounting frame 451 and the contact plate 44 forward. During the forward movement of the contact plate 44, it disengages from the curved top plate 455. The third elastic element 452 rebounds, causing the contact plate 44 to contact the side of the steel coil, thereby removing the plastic film on the surface of the steel coil. This prevents the plastic film that remains attached to the steel coil after cutting from needing to be manually removed. Before the curved top plate 455 contacts the contact plate 44, the torsion spring 456 twists the curved top plate 455 to ensure that the front end of the curved top plate 455 can be aligned with the mating hole 441 of the contact plate 44. During the disengagement of the curved top plate 455 from the contact plate 44, the torsion spring 456 twists to reduce the resistance generated by the curved top plate 455 on the movement of the contact plate 44.

[0039] like Figure 8 As shown, it also includes a buffer pad 46, which is provided on the front side of the contact plate 44.

[0040] During the contact and compression process between the contact plate 44 and the steel coil, the buffer pad 46 can buffer the pressure of the steel coil on the contact plate 44, thereby reducing the frictional loss of the steel coil on the contact plate 44. The elasticity of the buffer pad 46 also makes the connection between the steel coil and the contact plate 44 more stable, reducing the possibility of the contact plate 44 sliding on the front side of the steel coil.

[0041] First, the steel coil is placed on the placement plate 24 of the feeding mechanism 2. This plate 24 moves within the groove of the uncoiler base 1 via wheels 22 on the movable base 21, thus conveying the steel coil to the vicinity of the uncoiler shaft 12. The adjustment component 23 of the feeding mechanism 2 drives the bidirectional threaded screw 232 to rotate via a servo motor 231, causing the connecting sleeve 234 to slide on the bidirectional threaded screw 232. This, in turn, drives the placement plate 24 up and down via the connecting block 235 and connecting rod 236, precisely adjusting the height of the steel coil to align it with the uncoiler shaft 12. During the movement of the steel coil, the cutting element 35 of the cutting mechanism 3 slides on top of the coil. Simultaneously, the bending plate 363, through the cooperation of the telescopic rod 362 and the second elastic element 364, expands and buffers the plastic film on the surface of the steel coil, ensuring that the cutting element 35 can cut the plastic film smoothly and accurately. After cutting, the steel coil continues to move, pushing the contact plate 44 of the protective assembly 4 backward. The contact plate 44 causes the guardrail 41 to slide and unfold on the stop bar 14, wrapping around the left and right sides of the steel coil to prevent it from suddenly springing open after being released from restraint. When the steel coil is fully fitted onto the drum shaft 12, the curved top plate 455 of the unlocking assembly 45 passes through the mating hole 441 of the contact plate 44 and forces the contact plate 44 to slide apart to the left and right, disengaging the contact plate 44 from the steel coil. At the same time, the return spring 43 rebounds, causing the guardrail 41 and the contact plate 44 to return to their original positions. During the resetting process, the contact plate 44 contacts the steel coil through the buffer pad 46 on its front side, scraping off any remaining plastic film.

[0042] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A safety uncoiler for cold-rolled steel sheets, comprising an uncoiler base (1), an uncoiler (11), and a coil shaft (12), wherein the uncoiler (11) is mounted on the uncoiler base (1), and the uncoiler (11) is mounted with a coil shaft (12) for placing steel coils, characterized in that: It also includes a connecting frame (13), a stop bar (14), a feeding mechanism (2), a cutting mechanism (3), and a protective component (4). The connecting frame (13) is connected to the uncoiling base (1), and the stop bar (14) is connected to the left and right sides of the connecting frame (13). The end of the stop bar (14) is connected to the uncoiling machine (11). The uncoiling base (1) is provided with a feeding mechanism (2) for conveying steel coils. The bottom of the connecting frame (13) is equipped with a cutting mechanism (3) for cutting the plastic film wrapping the steel coil. The connecting frame (13) and the stop bar (14) are provided with a protective component (4) to prevent the steel coil from unraveling. The protective component (4) includes a guardrail (41), a tension link (42), a return spring (43), a contact plate (44), and an unlocking component (45). At least two guardrails (41) are connected to the front side of the stop bar (14), and at least two guardrails (41) are slidably connected to the rear side of the stop bar (14). A return spring (43) is sleeved on the rear side of the stop bar (14), and a return spring (43) is connected between two adjacent guardrails (41) on the rear side of the stop bar (14). A contact plate (44) is connected to the rearmost guardrail (41), and an unlocking component (45) for squeezing the contact plate (44) to move is provided at the rear end of the stop bar (14). The unlocking component (45) includes a mounting frame (451), a third elastic element (452), a fixing plate (453), a fixing element (454), a curved top plate (455), and a torsion spring (456). The mounting frame (451) is connected to the rear side of the last side guardrail (41). The contact plate (44) is slidably connected to the mounting frame (451). The third elastic element (452) is provided in the mounting frame (451). One end of the third elastic element (452) is connected to the mounting frame (451), and the other end is connected to the contact plate (44). The stop bar (14) The last end is connected to a fixing plate (453), the fixing plate (453) is connected to a fixing member (454), the fixing member (454) is rotatably connected to a curved top plate (455), the contact plate (44) has a mating hole (441), the curved top plate (455) passes through the mating hole (441), the curved top plate (455) and the contact plate (44) are pressed together, and a torsion spring (456) is sleeved on the fixing member (454), one end of the torsion spring (456) is connected to the fixing member (454), and the other end is connected to the curved top plate (455).

2. The cold-rolled steel sheet safety uncoiling machine according to claim 1, characterized in that: The feeding mechanism (2) includes a movable base (21), wheels (22), an adjustment component (23) and a placement plate (24). Wheels (22) are installed on both sides of the movable base (21). The uncoiling base (1) has grooves, and the wheels (22) move in the grooves. An adjustment component (23) is provided on the movable base (21). A placement plate (24) for carrying the steel coil is provided on the adjustment component (23). The adjustment component (23) is used to adjust the height of the placement plate (24), thereby adjusting the height of the steel coil.

3. A cold-rolled steel sheet safety uncoiling machine according to claim 2, characterized in that: The adjustment assembly (23) includes a servo motor (231), a bidirectional threaded screw (232), a guide rod (233), a connecting sleeve (234), a connecting block (235), and a connecting rod (236). The servo motor (231) is mounted on the movable base (21). The bidirectional threaded screw (232) is rotatably connected to the front top of the movable base (21). The guide rod (233) is fixedly connected to the rear top of the movable base (21). The servo motor (231) is connected to one end of the bidirectional threaded screw (232). Two connecting sleeves (234) are threadedly connected to the bidirectional threaded screw (232). Two connecting sleeves (234) are slidably connected to the guide rod (233). A connecting block (235) is rotatably connected to the top of the connecting sleeve (234). The top of all connecting blocks (235) is rotatably connected to the placement plate (24). A connecting rod (236) is connected between the connecting blocks (235) on the bidirectional threaded screw (232) and the guide rod (233) which are in opposite front-to-back positions.

4. A cold-rolled steel sheet safety uncoiling machine according to claim 3, characterized in that: The cutting mechanism (3) includes a mounting frame (31), a limiting rod (32), a mounting block (33), a first elastic element (34), a cutting element (35), and a buffer assembly (36). The mounting frame (31) is connected in the middle of the connecting frame (13). The limiting rod (32) is slidably connected to the top of the mounting frame (31). The mounting block (33) is connected to the bottom of the limiting rod (32). The cutting element (35) is installed inside the mounting block (33). The first elastic element (34) is sleeved on the limiting rod (32). One end of the first elastic element (34) is connected to the mounting frame (31), and the other end is connected to the mounting block (33). The buffer assembly (36) for reducing the impact of the steel coil is provided on the mounting frame (31).

5. A cold-rolled steel sheet safety uncoiling machine according to claim 4, characterized in that: The buffer assembly (36) includes a telescopic tube (361), a telescopic rod (362), a bending plate (363), and a second elastic element (364). The mounting bracket (31) is connected to the telescopic tube (361). The telescopic rod (362) is slidably connected inside the telescopic tube (361). The bending plate (363) is connected to the bottom of the telescopic rod (362). The second elastic element (364) is sleeved on the telescopic rod (362). One end of the second elastic element (364) is connected to the telescopic tube (361), and the other end is connected to the bending plate (363).

6. A cold-rolled steel sheet safety uncoiler according to claim 1, characterized in that: It also includes a buffer pad (46), and a buffer pad (46) is provided on the front side of the contact plate (44).

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