A multi-layer composite rolling device for cold-rolled strip steel

CN224823898UActive Publication Date: 2026-10-09DEQING COUNTRY OUMEITE METAL PROD CO LTD
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Patent Information

Application Number
CN202522405464.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-13
Publication Date
2026-10-09
Estimated Expiration
2035-11-13

AI Technical Summary

Technical Problem

[0004]本实用新型的目的在于提供一种冷轧带钢多层复合轧制装置,通过设置调节机构,具体是启动右侧电机一带动双向丝杆顺时针转动,两移动环相互远离,使两个升降块带动工作辊下移挤压带钢,启动两个电机四带动工作辊顺时针转动,与辅助辊配合完成复合带钢的轧制,并将带钢向左输送,再次完成轧制,电机一顺时针转动时,工作辊与辅助辊空隙缩小,轧制厚度会减小,电机一逆时针转动,空隙增大,轧制厚度相应增加,此结构能够快速且灵活调节复合带钢的轧制厚度,以适配不同的加工需求,解决了现有轧制装置的工作辊和辅助辊大多为固定结构,难以快速调节两者之间的间隙,而在需要轧制不同厚度的复合带钢时,便需要工作人员花费较长的时间以及精力去解除工作辊和辅助辊的固定,间距调节完成后再重新固定,导致此方式较为费时费力,难以快速适应不同加工需求的问题

Benefits of technology

[0014]1、本实用新型通过设置调节机构,具体是启动右侧电机一带动双向丝杆顺时针转动,两移动环相互远离,使两个升降块带动工作辊下移挤压带钢,启动两个电机四带动工作辊顺时针转动,与辅助辊配合完成复合带钢的轧制,并将带钢向左输送,再次完成轧制,电机一顺时针转动时,工作辊与辅助辊空隙缩小,轧制厚度会减小,电机一逆时针转动,空隙增大,轧制厚度相应增加,此结构能够快速且灵活调节复合带钢的轧制厚度,以适配不同的加工需求。

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Abstract

The utility model discloses a cold-rolled strip steel multilayer composite rolling device relates to strip steel processing technical field, the utility model discloses a base still includes: adjusting mechanism, adjusting mechanism sets up at two horizontal boards top, adjusting mechanism is used for adjusting the rolling thickness of composite strip steel. The utility model discloses through setting adjusting mechanism, specifically is the start right -hand side motor one drives the clockwise rotation of bidirectional screw rod, two mobile rings are far away from each other, make two lifting pieces drive work roll down -shift extruding strip steel, and start two motor four drive work roll clockwise rotation, and the auxiliary roll cooperation completes the rolling of composite strip steel, and will left -hand side convey strip steel, and again complete the rolling, and motor one clockwise rotation, and work roll and auxiliary roll gap reduce, and rolling thickness will reduce, and motor one counterclockwise rotation, and gap increase, and rolling thickness correspondingly increase, and this structure can fast and nimble adjusting the rolling thickness of composite strip steel, to adapt to different processing demand.
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Description

Technical Field

[0001] This utility model belongs to the field of strip steel processing technology, and in particular relates to a multi-layer composite rolling device for cold-rolled strip steel. Background Technology

[0002] An advanced cold rolling equipment for metal material processing, the core of which is to be able to combine two layers of metal strips of different materials or specifications (such as carbon steel, stainless steel, aluminum alloy, copper, etc.) under the action of rolling force through huge plastic deformation, so that the atoms or molecules between their interfaces can achieve a strong metallurgical bond at room temperature or low heating temperature, thereby forming a single, high-performance layered composite strip steel in one step.

[0003] Most existing multi-layer composite rolling equipment for cold-rolled strip steel uses work rolls and auxiliary rolls to roll two stacked steel coils together. During rolling, the distance between the work rolls and auxiliary rolls is less than the thickness of the composite strip steel. This causes the composite strip steel to be squeezed as it passes through the gap between the two rolls, thus completing the rolling process. However, most existing work rolls and auxiliary rolls are fixed structures, and the distance between them is difficult to adjust. When it is necessary to adjust the rolling thickness of the composite strip steel, the operator must use tools to remove the fixed work rolls and auxiliary rolls, and then use tools to fix them back after adjustment. This method not only increases the workload of the operator, but also takes a long time to adjust manually, making it difficult to quickly adapt to different processing requirements. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer composite rolling device for cold-rolled strip steel. By setting an adjustment mechanism, specifically, starting the right-side motor one drives the bidirectional lead screw to rotate clockwise, causing the two moving rings to move away from each other. This causes the two lifting blocks to move the work rolls downwards to compress the strip steel. Starting the two motors four drives the work rolls to rotate clockwise, cooperating with the auxiliary rolls to complete the rolling of the composite strip steel and conveying the strip steel to the left for another rolling cycle. When motor one rotates clockwise, the gap between the work roll and the auxiliary roll decreases, reducing the rolling thickness. When motor one rotates counterclockwise, the gap increases, correspondingly increasing the rolling thickness. This structure allows for quick and flexible adjustment of the rolling thickness of the composite strip steel to adapt to different processing requirements. It solves the problem that most existing rolling devices have fixed work rolls and auxiliary rolls, making it difficult to quickly adjust the gap between them. When rolling composite strip steel of different thicknesses, operators need to spend considerable time and effort to remove the fixed work rolls and auxiliary rolls, adjust the gap, and then re-fix them, making this method time-consuming, labor-intensive, and unable to quickly adapt to different processing needs.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a multi-layer composite rolling device for cold-rolled strip steel, comprising a base, two vertical plates mounted on the right side of the top of the base, a bracket fixedly connected to the left side of the top of the base, two horizontal plates fixedly connected to the top of the bracket, and several driven rollers rotatably connected inside the two horizontal plates. It also includes: an adjustment mechanism positioned above the two horizontal plates, used to adjust the rolling thickness of the composite strip steel; the adjustment mechanism includes two working rollers and two auxiliary rollers; two adjustment grooves are formed inside the horizontal plates, with lifting blocks slidingly limiting the movement within each groove; the front and back sides of the working rollers are rotatably connected to the two lifting blocks respectively; and an uncoiling mechanism positioned on the right side of the two horizontal plates, used to guide and flatten the steel coil; the bottom of the vertical plate located on the back side is fixedly connected to the base by bolts.

[0007] Furthermore, the adjustment mechanism includes several hinge seats, and two limiting grooves are formed in the inner wall of the adjustment groove. Limiting blocks are fixedly connected to the left and right sides of the lifting block. The limiting blocks slide and limit the limiting grooves. The bottom of the hinge seat is fixedly connected to the top of the lifting block. A motor is fixedly connected to the front of the lifting block located on the front side. The output end of the motor is fixedly connected to one end of the front of the working roller through a coupling. The adjustment groove is used to limit the lifting block, and the limiting blocks are used to prevent the lifting block from disengaging from the adjustment groove.

[0008] Furthermore, two unwinding rollers are rotatably connected inside the two vertical plates, and two motors are fixedly connected to the front of the vertical plate located on the front side. The output end of the motors on the back is fixedly connected to one end of the front of the unwinding rollers through a coupling.

[0009] Furthermore, the auxiliary roller is rotatably connected to two horizontal plates, and two support seats are fixedly connected to the top of each of the two horizontal plates. Two bidirectional lead screws are provided above the two horizontal plates, and the bidirectional lead screws are rotatably connected to the two support seats on the same side. A trapezoidal notch is provided at the bottom of the support seat. The trapezoidal notch at the bottom of the support seat can prevent the hinge rod from contacting the support seat when it moves, thus preventing it from getting stuck.

[0010] Furthermore, a motor is fixedly connected to the front of the support base located on the front side. The output end of the motor is fixedly connected to one end of the front of the bidirectional lead screw via a coupling. Two moving rings are slidably connected to the outer surface of the bidirectional lead screw. A hinge rod is hinged to the bottom of the moving ring. One end of the hinge rod is hinged to the hinge base. A dust cover is provided above the working roller. The front and back of the dust cover are fixedly connected to the sides of the two support bases that are close to each other. The cross-section of the dust cover is U-shaped. The U-shaped cross-section of the dust cover can effectively prevent dust from entering its interior without affecting the normal operation of the adjustment.

[0011] Furthermore, a triangular block is fixedly connected to the right side of each of the two vertical plates, and an anti-detachment roller is rotatably connected inside the two triangular blocks. An anti-detachment ring is fixedly connected to the front of the anti-detachment roller; the back of the anti-detachment ring contacts the front of the front triangular block. The anti-detachment ring is used to prevent the anti-detachment roller from detaching from the two triangular blocks. When the back vertical plate is removed, the back of the anti-detachment roller loses its support, and the anti-detachment ring can prevent the anti-detachment roller from detaching from the front triangular block.

[0012] Furthermore, the unwinding mechanism includes two opening and closing plates, each with a rotating shaft fixedly connected to its left side. The opening and closing plates are rotatably connected to two horizontal plates via the rotating shafts. Gear 1 is fixedly connected to the front of the upper rotating shaft, and gear 2 is fixedly connected to the front of the lower rotating shaft. Gear 1 and gear 2 are meshed together. Motor 3 is fixedly connected to the back of the horizontal plate on the front side. Gear 3 is fixedly connected to the front output end of motor 3. Gear 3 is meshed with gear 1. Dust cover 2 is fixedly connected to the front of the horizontal plate on the front side. Dust cover 2 can prevent debris from entering its interior and affecting the meshing of gear 1, gear 2, and gear 3.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model, through the setting of an adjustment mechanism, specifically, starts the right motor to drive the bidirectional lead screw to rotate clockwise, the two moving rings move away from each other, causing the two lifting blocks to drive the work rollers to move down and squeeze the strip steel. Then, starts the two motors to drive the work rollers to rotate clockwise, cooperating with the auxiliary rollers to complete the rolling of the composite strip steel and conveying the strip steel to the left to complete the rolling again. When the motor rotates clockwise, the gap between the work roller and the auxiliary roller decreases, and the rolling thickness decreases. When the motor rotates counterclockwise, the gap increases, and the rolling thickness increases accordingly. This structure can quickly and flexibly adjust the rolling thickness of the composite strip steel to adapt to different processing requirements.

[0015] 2. This utility model, through the setting of an unwinding mechanism, specifically, when unwinding two steel coils, the anti-detachment roller can prevent the unbundled steel coil from excessively expanding and unwinding. When guiding the loosened steel coil into the space between the working roller and the auxiliary roller, the starting motor three drives the gear three to rotate clockwise. Through gear one and gear two, the right sides of the two opening and closing plates come into contact with the corresponding steel coils, so that the two unwinding steel coils are guided into the space between the two opening and closing plates, flattening the initially bent steel coils, and allowing them to enter the space between the working roller and the auxiliary roller more effectively, reducing the workload of workers in correcting bent steel coils.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the anti-detachment ring structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotating shaft structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the adjustment mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the limiting block structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Base; 11. Vertical plate; 12. Bracket; 13. Horizontal plate; 131. Driven roller; 2. Adjustment mechanism; 21. Adjustment groove; 211. Limit groove; 212. Lifting block; 213. Limit block; 214. Hinge seat; 215. Motor four; 22. Working roller; 23. Auxiliary roller; 24. Bidirectional lead screw; 241. Motor one; 242. Moving ring; 243. Hinge rod; 244. Dust cover one; 25. Support seat; 3. Unwinding mechanism; 31. Unwinding roller; 311. Motor two; 32. Triangular block; 321. Anti-detachment roller; 322. Anti-detachment ring; 33. Opening and closing plate; 331. Rotating shaft; 332. Gear one; 333. Gear two; 334. Motor three; 335. Gear three; 336. Dust cover two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5As shown, this utility model is a multi-layer composite rolling device for cold-rolled strip steel, including a base 1, two vertical plates 11 installed on the right side of the top of the base 1, a bracket 12 fixedly connected to the left side of the top of the base 1, two horizontal plates 13 fixedly connected to the top of the bracket 12, and several driven rollers 131 rotatably connected inside the two horizontal plates 13. It also includes: an adjustment mechanism 2, which is located above the two horizontal plates 13 and is used to adjust the rolling thickness of the composite strip steel. The adjustment mechanism 2 includes two working rollers 22 and two auxiliary rollers 23. Two adjustment grooves 21 are opened inside the horizontal plates 13, and lifting blocks 212 are slidably limited inside the adjustment grooves 21. The front and back sides of the working rollers 22 are rotatably connected to the two lifting blocks 212 respectively; an uncoiling mechanism 3, which is located on the right side of the two horizontal plates 13 and is used to guide and flatten the steel coil; the bottom of the vertical plate 11 located on the back side is fixedly connected to the base 1 by bolts. The adjusting mechanism 2 includes several hinge seats 214. Two limiting grooves 211 are formed on the inner wall of the adjusting groove 21. Limiting blocks 213 are fixedly connected to the left and right sides of the lifting block 212. The limiting blocks 213 slide and limit the movement of the limiting grooves 211. The bottom of the hinge seats 214 is fixedly connected to the top of the lifting block 212. A motor 215 is fixedly connected to the front of the lifting block 212. The output end of the motor 215 is fixedly connected to one front end of the work roller 22 via a coupling. The adjusting groove 21 is used to limit the movement of the lifting block 212, and the limiting blocks 213 are used to prevent the lifting block 212 from disengaging from the adjusting groove 21. Two unwinding rollers 31 are rotatably connected inside the two vertical plates 11. Two motors 311 are fixedly connected to the front of the vertical plate 11. The output end of the motors 311 is fixedly connected to one front end of the unwinding rollers 31 via a coupling. The auxiliary roller 23 is rotatably connected to the two horizontal plates 13. The top of each of the two horizontal plates 13 is fixedly connected to two support seats 25. Two bidirectional lead screws 24 are provided above the two horizontal plates 13. The bidirectional lead screws 24 are rotatably connected to the two support seats 25 on the same side. The bottom of the support seat 25 is provided with a trapezoidal notch.A motor 241 is fixedly connected to the front of the support base 25 located on the front side. The output end of the motor 241 is fixedly connected to one end of the front of the bidirectional lead screw 24 via a coupling. Two moving rings 242 are slidably connected to the outer surface of the bidirectional lead screw 24. A hinge rod 243 is hinged to the bottom of the moving ring 242. One end of the hinge rod 243 is hinged to the hinge base 214. A dust cover 244 is set above the work roller 22. The front and back of the dust cover 244 are fixedly connected to the sides of the two support bases 25 that are close to each other, respectively. When the right motor 241 is started, the bidirectional lead screw 24 rotates clockwise, and the two moving rings... 242 are moved away from each other, causing the two lifting blocks 212 to drive the work roll 22 to move down and squeeze the strip. The two motors 215 are started to drive the work roll 22 to rotate clockwise, which works with the auxiliary roll 23 to complete the rolling of the composite strip and convey the strip to the left to complete the rolling again. When the motor 241 rotates clockwise, the gap between the work roll 22 and the auxiliary roll 23 decreases, and the rolling thickness decreases. When the motor 241 rotates counterclockwise, the gap increases, and the rolling thickness increases accordingly. This structure can quickly and flexibly adjust the rolling thickness of the composite strip to adapt to different processing requirements. The dust cover 244 has a U-shaped cross-section.

[0027] Triangular blocks 32 are fixedly connected to the right side of each of the two vertical plates 11. Anti-detachment rollers 321 are rotatably connected inside the two triangular blocks 32. Anti-detachment rings 322 are fixedly connected to the front of the anti-detachment rollers 321. The back of the anti-detachment rings 322 is in contact with the front of the triangular blocks 32. The anti-detachment rings 322 are used to prevent the anti-detachment rollers 321 from detaching from the two triangular blocks 32. The unwinding mechanism 3 includes two opening and closing plates 33. A rotating shaft 331 is fixedly connected to the left side of each of the two opening and closing plates 33. The opening and closing plates 33 are rotatably connected to two horizontal plates 13 via the rotating shafts 331. A gear 1 332 is fixedly connected to the front of the upper rotating shaft 331, and a gear 2 333 is fixedly connected to the front of the lower rotating shaft 331. Gear 1 332 and gear 2 333 mesh with each other. A motor 334 is fixedly connected to the back of the horizontal plate 13 on the front side. A gear 335 is fixedly connected to the front output end of the motor 334. Gear 335 meshes with gear 1 332. The front of the horizontal plate 13... A dust cover 336 is fixedly connected; when unwinding two steel coils, the anti-detachment roller 321 can prevent the loosened steel coil from expanding and spreading excessively. When guiding the loosened steel coil into the space between the working roller 22 and the auxiliary roller 23, the motor 334 drives the gear 335 to rotate clockwise. Through the gear 1 332 and the gear 2 333, the right side of the two opening plates 33 contacts the corresponding steel coil, so that the two unwound steel coils are guided into the space between the two opening plates 33, flattening the initially bent steel coils, so that they can enter the space between the working roller 22 and the auxiliary roller 23 better, reducing the workload of workers in correcting the bent steel coils.

[0028] A specific application of this embodiment is as follows: In use, first unscrew the bolts at the bottom of the back vertical plate 11, then remove the back vertical plate 11. Next, insert the centers of the two steel coils into the two unwinding rollers 31 respectively, with the winding directions of the two steel coils being opposite. Then, reinstall the back vertical plate 11. After that, start the motor 334 to drive the gear 335 to rotate clockwise. The gear 335 will drive the gear 1 332 to rotate counterclockwise, and the gear 1 332 will also drive the gear 2 333 to rotate clockwise. At this time, the right sides of the two opening and closing plates 33 will move away from each other until the right sides of the two opening and closing plates 33 are respectively with the two When the steel coils come into contact, stop. Then remove the restraints on the two steel coils. At this time, the steel coils will expand and spread out. The anti-detachment roller 321 will prevent the steel coils from spreading out further. Then, start the lower motor 311 to drive the lower unwinding roller 31 to rotate counterclockwise. Then start the upper motor 311 to drive the upper unwinding roller 31 to rotate clockwise. At this time, one end of each steel coil will move to the left. When it comes into contact with the corresponding opening and closing plate 33, it will move to the left along the direction of the opening and closing plate 33 until it passes through the gap between the two opening and closing plates 33. At the same time, the staff uses tools to guide the two strip steel into the space between the working roller 22 and the auxiliary roller 23 on the right.

[0029] At this point, the right-side motor 241 is activated, driving the connected bidirectional lead screw 24 to rotate clockwise. The two moving rings 242 will then move away from each other. Since the hinge rod 243 is hinged to the hinge seat 214 at the top of the lifting block 212, and the lifting block 212 is slidably connected to the adjusting groove 21, the two lifting blocks 212 will move downwards along with the work rollers 22, compressing the strip steel. The left-side work roller 22 is adjusted in the same way. Then, both motors 215 are activated simultaneously, driving the connected work rollers 22 to rotate clockwise. As the right-side work roller 22 rotates, it will convey the strip steel to the left, and the strip steel will be conveyed to the left along with the work rollers on the same side. The auxiliary roller 23 works together to continuously roll the strip. After the strip moves between the left working roller 22 and the auxiliary roller 23, it will be rolled again. Then, an external winding device is used to wind up the two rolled strips. When it is necessary to adjust the thickness of the two layers of strip, the motor 241 can be started to drive the bidirectional lead screw 24 to rotate clockwise. At this time, the gap between the working roller 22 and the auxiliary roller 23 is reduced, and the thickness of the two layers of strip after rolling will also decrease. When the motor 241 is started to rotate counterclockwise, the working roller 22 moves away from the auxiliary roller 23, and the thickness of the composite strip after rolling increases.

[0030] It should be noted that the control of motor 1 241, motor 2 311, motor 3 334 and motor 4 215 in this application can all be achieved by using the program set in their internal control panel and inputting relevant parameters as needed for automated control. The setting of this control method can be realized by existing technologies, such as PLC.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-layer composite rolling device for cold-rolled strip steel, comprising a base (1), wherein two vertical plates (11) are installed on the right side of the top of the base (1), and a bracket (12) is fixedly connected to the left side of the top of the base (1), wherein two horizontal plates (13) are fixedly connected to the top of the bracket (12), and a plurality of driven rollers (131) are rotatably connected inside the two horizontal plates (13), characterized in that, Also includes: An adjusting mechanism (2) is provided above two horizontal plates (13). The adjusting mechanism (2) is used to adjust the rolling thickness of the composite strip. The adjusting mechanism (2) includes two work rolls (22) and two auxiliary rolls (23). Two adjusting grooves (21) are provided inside the horizontal plates (13). Lifting blocks (212) are slidably limited inside the adjusting grooves (21). The front and back sides of the work rolls (22) are rotatably connected to the two lifting blocks (212). An unwinding mechanism (3) is provided on the right side of two horizontal plates (13) and is used to guide and flatten the steel coil. The bottom of the vertical plate (11) located on the back is fixedly connected to the base (1) by bolts.

2. The multi-layer composite rolling device for cold-rolled strip steel according to claim 1, characterized in that, The adjustment mechanism (2) includes several hinge seats (214). The inner wall of the adjustment groove (21) has two limiting grooves (211). The left and right sides of the lifting block (212) are fixedly connected to limiting blocks (213). The limiting blocks (213) and the limiting grooves (211) are slidably limited. The bottom of the hinge seat (214) is fixedly connected to the top of the lifting block (212). The front of the lifting block (212) is fixedly connected to a motor (215). The output end of the back of the motor (215) is fixedly connected to one end of the front of the working roller (22) through a coupling. The adjusting groove (21) is used to limit the lifting block (212), and the limiting block (213) is used to prevent the lifting block (212) from disengaging from the adjusting groove (21).

3. The multi-layer composite rolling device for cold-rolled strip steel according to claim 1, characterized in that, Two unwinding rollers (31) are rotatably connected inside the two vertical plates (11). Two motors (311) are fixedly connected to the front of the vertical plate (11) located on the front side. The output end of the motors (311) on the back side is fixedly connected to one end of the front side of the unwinding roller (31) through a coupling.

4. The multi-layer composite rolling device for cold-rolled strip steel according to claim 2, characterized in that, The auxiliary roller (23) is rotatably connected to two horizontal plates (13). Two support seats (25) are fixedly connected to the top of each of the two horizontal plates (13). Two bidirectional screws (24) are provided above the two horizontal plates (13). The bidirectional screws (24) are rotatably connected to the two support seats (25) on the same side. The support base (25) has a trapezoidal notch at its bottom.

5. A multi-layer composite rolling apparatus for cold-rolled strip steel according to claim 4, characterized in that, A motor (241) is fixedly connected to the front of the support base (25) located on the front side. The output end of the motor (241) is fixedly connected to one end of the front of the double-acting screw (24) via a coupling. Two moving rings (242) are slidably connected to the outer surface of the double-acting screw (24). A hinge rod (243) is hinged to the bottom of the moving ring (242). One end of the bottom of the hinge rod (243) is hinged to the hinge base (214). A dust cover (244) is provided above the working roller (22). The front and back of the dust cover (244) are fixedly connected to the side of the two support bases (25) that are close to each other. The dust cover (244) has a U-shaped cross-section.

6. The multi-layer composite rolling apparatus for cold-rolled strip steel according to claim 3, characterized in that, Triangular blocks (32) are fixedly connected to the right side of both vertical plates (11), and anti-detachment rollers (321) are rotatably connected inside the two triangular blocks (32). Anti-detachment rings (322) are fixedly connected to the front of the anti-detachment rollers (321). The back of the anti-detachment ring (322) is in contact with the front of the front triangular block (32), and the anti-detachment ring (322) is used to prevent the anti-detachment roller (321) from detaching from the two triangular blocks (32).

7. A multi-layer composite rolling apparatus for cold-rolled strip steel according to claim 6, characterized in that, The unwinding mechanism (3) includes two opening and closing plates (33). A rotating shaft (331) is fixedly connected to the left side of each of the two opening and closing plates (33). The opening and closing plates (33) are rotatably connected to the two horizontal plates (13) through the rotating shaft (331). A gear 1 (332) is fixedly connected to the front of the upper rotating shaft (331), and a gear 2 (333) is fixedly connected to the front of the lower rotating shaft (331). The gear 1 (332) and the gear 2 (333) are meshed together. A motor 3 (334) is fixedly connected to the back of the horizontal plate (13) on the front. A gear 3 (335) is fixedly connected to the front output end of the motor 3 (334). The gear 3 (335) and the gear 1 (332) are meshed together. A dust cover 2 (336) is fixedly connected to the front of the horizontal plate (13) on the front.