Rolling mill for the production of metal strips

Abstract

The application relates to the field of metal strip production and processing, in particular to a rolling mill for metal strip production. When an operator adjusts the roll gap according to process requirements and then adjusts the position of the tension guide roller, the fixed pressing plate will interfere with the surface of the strip material with the change in position. Lightly, the pressing plate will cause additional scraping resistance to the strip material, affecting the accuracy and response speed of tension adjustment. Heavily, scratches will be caused on the surface of the strip material. During the dynamic adjustment process of the tension guide roller, the arc-shaped pressing plate will not form additional frictional resistance to the aluminum alloy strip material, avoiding the scraping caused by the relative position change between the arc-shaped pressing plate and the moving aluminum alloy strip material during the adjustment process. During the steady-state operation period without adjustment, the arc-shaped pressing plate continuously provides stable pressing force.

Description

Technical Field

[0001] This invention relates to the field of metal strip production and processing, specifically to a rolling mill for metal strip production. Background Technology

[0002] Optical cables are the infrastructure for information transmission in modern society, and their reliability directly affects communication quality. In order to improve the mechanical strength of optical cables, especially their ability to resist mechanical damage such as rodent bites, soil pressure, and construction tension, one or more layers of rolled aluminum alloy strips are usually set in the optical cable structure as armor layers.

[0003] In the production of optical cables, flat aluminum alloy strips need to be rolled with continuous corrugated patterns on their surface using rolling equipment. This process is called rolling. Rolling not only improves the flexibility of the aluminum alloy strip, making it easier to wrap around the optical cable core in subsequent processes, but also allows the corrugated structure to form a tighter interlock with other material layers of the optical cable.

[0004] The aluminum alloy strip is drawn out from the unwinding end, and after the tension guide roller adjusts the path and initial tension, it is introduced into the roll gap between the driving and driven rolling rolls. Under the pressure of the two rolls, the aluminum alloy strip undergoes plastic deformation, and its surface is imprinted with grooves corresponding to the driving roll mold.

[0005] In order to suppress the lateral drift and longitudinal vibration of the strip during the conveying process and ensure the uniformity of the rolling pattern, existing rolling mills usually set a fixed bow-shaped pressure plate or similar clamping device above the feed direction of the guide roll to increase the adhesion between the strip and the guide roll.

[0006] During the adjustment of rolling depth and tension, when the operator adjusts the roll gap according to process requirements and thus adjusts the position of the tension guide roll, the fixed pressure plate will interfere with the strip surface whose position has changed. This can result in additional scraping resistance between the pressure plate and the strip, affecting the accuracy and response speed of tension adjustment, or even causing scratches on the strip surface. Summary of the Invention

[0007] The purpose of this invention is to provide a rolling mill for metal strip production to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: A rolling mill for metal strip production includes a conveyor frame, wherein tension guide rollers, active rolling rollers, and driven rolling rollers are sequentially arranged on the conveyor frame. Aluminum alloy strip is drawn out from the unwinding end, and after being formed at a predetermined wrap angle by the tension guide rollers, it is guided into the roll gap between the active and driven rolling rollers. The rolling depth adjustment components are symmetrically arranged in two sets and are positioned opposite each other on both sides of the conveyor frame to adjust the roll gap between the driven and active rolling rollers. Each set of rolling depth adjustment components includes a mounting seat fixedly installed on the side wall of the conveyor frame. A guide rail is machined vertically on the side wall of the conveyor frame, and a guide slider is slidably fitted within the guide rail. The bearing seats at both ends of the driven rolling roller are mounted on the guide sliders on both sides.

[0008] Preferably, an adjusting screw is installed on the mounting base, and the lower end of the adjusting screw is connected to the guide slider. By rotating the adjusting screw, the rotational motion is converted into linear displacement of the guide slider within the guide track.

[0009] Preferably, the rolling depth adjustment assembly further includes a linkage swing arm hinged to the mounting base via a rotating shaft, and one end of the linkage swing arm is provided with a guide roller.

[0010] Preferably, the guide slider has a guide groove machined at an angle relative to its sliding direction, and the guide roller on the linkage arm is partially embedded in the guide groove and can roll along the length of the guide groove.

[0011] Preferably, the mounting base is further provided with a tension adjustment mechanism, which forms a transmission connection with the linkage swing arm.

[0012] Preferably, the tension adjustment mechanism includes a rigid bracket fixedly mounted on the mounting base, and the rigid bracket is machined with a dovetail groove;

[0013] A tension adjustment slider is slidably fitted inside the dovetail groove, and a sector gear is also mounted on the rigid bracket via a bearing, the sector gear being able to rotate around its bearing axis;

[0014] The linkage swing arm is fixedly provided with a rack that meshes with the sector gear, and the angular displacement of the linkage swing arm is achieved by the rack and the sector gear rotating together.

[0015] Preferably, a first transmission link is hinged to the end face of the sector gear at a point off-center from the center, and a second transmission link is hinged to the tension adjusting slider. The other ends of the first and second transmission links are connected to each other through a hinge shaft to form a planar linkage mechanism.

[0016] The tension adjusting slider is equipped with a rotating shaft, and the tension guide roller is mounted on the rotating shaft. The longitudinal displacement of the tension adjusting slider will be directly converted into the lifting and lowering changes of the tension guide roller, thereby changing the wrap angle of the aluminum alloy strip on it.

[0017] Preferably, an elastic element is provided between the rigid support and the tension adjusting slider. One end of the elastic element acts on the rigid support, and the other end acts on the tension adjusting slider, applying a continuous elastic force to the tension adjusting slider.

[0018] Preferably, an arc-shaped pressure plate is disposed above the tension guide roller in the feeding direction. The arc-shaped pressure plate is made of elastic wear-resistant material. An opening and closing mechanism is disposed on the rotating shaft. The opening and closing mechanism includes a fixed side plate fixedly installed on the side wall of the conveyor frame. An arc-shaped mounting frame is sleeved on the rotating shaft. The arc-shaped mounting frame is slidably connected to the fixed side plate, so that the arc-shaped mounting frame moves along the fixed side plate as the rotating shaft rises and falls.

[0019] Preferably, the inner side of the arc-shaped mounting bracket is provided with an arc-shaped groove. Two inwardly hinged pressure blocks are symmetrically hinged on both sides of the end of the arc-shaped pressure plate in the arc-shaped groove. The end of the arc-shaped pressure plate is embedded between the two pressure blocks. When the two pressure blocks rotate outward in the arc-shaped groove, they can drive the arc-shaped pressure plate to pull outward. A contact rod is provided on the pressure block in the direction of the fixed side plate. On the side of the fixed side plate facing the arc-shaped mounting bracket, two contour plates corresponding to the pressure blocks are fixedly provided. The edge structure of the contour plates is a continuous wavy curve.

[0020] Preferably, a limiting sleeve is fitted around the adjusting screw, the limiting sleeve is circumferentially fixed to the adjusting screw, and multiple slots are evenly distributed along the circumference of the outer surface of the limiting sleeve. A locking pin mounting hole is provided on the mounting base facing the limiting sleeve, and a manually operable locking pin is fitted in the locking pin mounting hole.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In this invention, the tension of the aluminum alloy strip can be adjusted in real time according to the set rolling depth and the roll gap between the active and driven rolling rolls. When adjusting the rolling depth, the tension of the unwound aluminum alloy strip can be increased appropriately to compensate for the traction resistance caused by the increase in the rolling deformation of the aluminum alloy strip and prevent the aluminum alloy strip from slipping or accumulating at the roll inlet.

[0023] In this invention, the downward movement of the tension adjustment slider causes the tension guide roller to synchronously lower its installation position, thereby reducing the wrap angle of the aluminum alloy strip on the tension guide roller. This releases some of the tension on the aluminum alloy strip, compensates for the tension increment caused by the increase in rolling depth, and keeps the tension of the aluminum alloy strip at the roll inlet within the set range, thus avoiding slippage.

[0024] In this invention, when the rolling depth decreases, the tension guide roller is driven by the tension adjustment slider to synchronously increase the wrap angle to supplement the tension, maintain the tension of the aluminum alloy strip during the conveying process, and avoid the stacking phenomenon caused by the relative sliding of the aluminum alloy strip during the conveying process due to the loosening of the aluminum alloy strip.

[0025] In this invention, during the dynamic adjustment of the tension guide roller, the bow-shaped pressure plate will not generate additional frictional resistance to the aluminum alloy strip, thus avoiding the scraping caused by the relative position change between the bow-shaped pressure plate and the moving aluminum alloy strip during the adjustment process. During the non-adjusted steady-state operation, the bow-shaped pressure plate continuously provides stable clamping force, suppressing the lateral drift and longitudinal vibration of the strip and ensuring the smoothness of the aluminum alloy strip conveying. Attached Figure Description

[0026] Figure 1 This is a front view of the aluminum alloy strip rolling process according to the present invention;

[0027] Figure 2 This is a front view of the conveyor frame and rolling depth adjustment assembly of the present invention;

[0028] Figure 3 This is a front view of the rolling depth adjustment component in this invention;

[0029] Figure 4 This is a three-dimensional structural diagram of the rolling depth adjustment component in this invention;

[0030] Figure 5 A partial three-dimensional cross-sectional view of the rolling depth adjustment component in this invention. Figure 1 ;

[0031] Figure 6 A partial three-dimensional cross-sectional view of the rolling depth adjustment component in this invention. Figure 2 ;

[0032] Figure 7 This is a three-dimensional structural diagram of the rolling depth adjustment component and tension adjustment mechanism in this invention;

[0033] Figure 8 This is a three-dimensional structural diagram of the tension adjustment mechanism in this invention;

[0034] Figure 9 This is a partial structural plan view of the tension adjustment mechanism in this invention;

[0035] Figure 10 This is a front view of the opening and closing mechanism in this invention;

[0036] Figure 11 This is a three-dimensional structural diagram of the opening and closing mechanism in this invention;

[0037] Figure 12 This is a three-dimensional diagram illustrating the opening and closing mechanism and the bow-shaped pressure plate in this invention.

[0038] In the diagram: 1. Conveyor frame; 11. Tension guide roller; 12. Active rolling roller; 13. Driven rolling roller; 2. Rolling depth adjustment assembly; 21. Mounting base; 22. Guide slider; 23. Adjusting screw; 24. Linkage swing arm; 25. Guide roller; 26. Guide chute; 3. Tension adjustment mechanism; 31. Rigid support; 32. Dovetail groove; 33. Tension adjustment slider; 34. Sector gear; 35. Rack; 36. First transmission link; 37. Second transmission link; 38. Rotating shaft; 39. Elastic element; 4. Bow-shaped pressure plate; 41. Opening and closing mechanism; 42. Fixed side plate; 43. Arc-shaped mounting bracket; 44. Arc-shaped slot; 45. Pressure block; 46. Contact rod; 47. Contour plate; 5. Limit sleeve; 51. Slot; 52. Locking pin; 6. Aluminum alloy strip. Detailed Implementation

[0039] 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. Example

[0040] Please see Figures 1 to 12 The present invention provides a technical solution: a rolling mill for metal strip production, including a rolling depth adjustment component 2, which is suitable for optical cable production process and is used to control the rolling depth when pre-rolling aluminum alloy strip 6 in a planar strip form in the early stage of optical cable manufacturing.

[0041] For example, the rolling depth adjustment component 2 is integrated on the conveyor frame 1 for aluminum alloy strip 6 in the optical cable production process. The conveyor frame 1 is sequentially equipped with tension guide roller 11, active rolling roller 12 and driven rolling roller 13. The aluminum alloy strip 6 is drawn out from the unwinding end, and after being formed by a predetermined wrap angle by the tension guide roller 11, it is guided into the roll gap between the active rolling roller 12 and the driven rolling roller 13. Through the interaction between the active rolling roller 12 and the driven rolling roller 13, a preset pattern is rolled on the surface of the aluminum alloy strip 6. The rolling depth adjustment component 2 disclosed herein is symmetrically arranged in two sets, opposite to each other on both sides of the conveyor frame 1, and is used to adjust the roll gap between the driven rolling roller 13 and the active rolling roller 12.

[0042] Specifically, in order to control the rolling depth of aluminum alloy strip 6, each rolling depth adjustment assembly 2 includes a mounting base 21 fixedly installed on the side wall of the conveyor frame 1. A guide rail is machined on the side wall of the conveyor frame 1 in the vertical direction, and a guide slider 22 is slidably fitted in the guide rail. The bearing seats at both ends of the driven rolling roll 13 are installed on the guide slider 22 on both sides, so that the driven rolling roll 13 can move vertically up and down with the guide slider 22 as a whole.

[0043] An adjusting screw 23 is installed on the mounting base 21. The lower end of the adjusting screw 23 is connected to the guide slider 22. By rotating the adjusting screw 23, the rotational motion is converted into the linear displacement of the guide slider 22 in the guide track.

[0044] When it is necessary to adjust the rolling depth of aluminum alloy strip 6, the operator rotates the adjusting screws 23 on both sides simultaneously. The rotation of the adjusting screws 23 drives the guide slider 22 connected to it to slide up or down along the guide rail.

[0045] Since the bearing seat of the driven rolling roll 13 is fixed on the guide slider 22, its vertical position changes accordingly, thereby adjusting the roll gap between the driven rolling roll 13 and the driving rolling roll 12. A decrease in the roll gap will increase the rolling depth, and vice versa. By adjusting the screws 23 on both sides synchronously, the driven rolling roll 13 is kept horizontal, avoiding uneven roll gap and deviation of aluminum alloy strip 6 caused by unilateral adjustment.

[0046] In this embodiment, the rolling depth adjustment component 2 further includes a linkage swing arm 24 that is hinged to the mounting base 21 via a rotating shaft, and a guide roller 25 is provided at one end of the linkage swing arm 24.

[0047] The guide slider 22 has a guide groove 26 machined at an angle relative to its sliding direction. The guide roller 25 on the linkage arm 24 is partially embedded in the guide groove 26 and can roll along the long direction of the guide groove 26.

[0048] The mounting base 21 is also provided with a tension adjustment mechanism 3, which is connected to the linkage swing arm 24 in a transmission connection.

[0049] When the linkage swing arm 24 rotates around the rotating shaft, it can drive the tension adjustment mechanism 3 to change the position of the tension guide roller 11, and finally adjust the wrap angle and path length of the aluminum alloy strip 6 on it, so as to adjust the unwinding tension.

[0050] The vertical displacement of the guide slider 22 directly changes the position of the driven rolling roll 13, thereby controlling the roll gap between the driving rolling roll 12 and the driven rolling roll 13 and directly adjusting the rolling depth of the aluminum alloy strip 6.

[0051] As the guide slider 22 moves vertically, the inclined guide groove 26 on it moves accordingly. Since the guide roller 25 is constrained in the guide groove 26, the displacement of the guide groove 26 will force the guide roller 25 to move. The displacement of the guide roller 25 will drive the linkage swing arm 24 to generate a corresponding angular displacement around its axis through the lever action. The rotation of the linkage swing arm 24 will then drive the tension adjustment mechanism 3 connected to it to automatically adjust the position of the tension guide roller 11.

[0052] The tension of the aluminum alloy strip 6 can be adjusted in real time according to the set rolling depth and the roll gap between the active rolling roll 12 and the driven rolling roll 13. When adjusting the rolling depth, the tension of the unwound aluminum alloy strip 6 can be increased appropriately to compensate for the traction resistance caused by the increase in the rolling deformation of the aluminum alloy strip 6, and to prevent the aluminum alloy strip 6 from slipping or accumulating at the roll inlet.

[0053] In this embodiment, the tension adjustment mechanism 3 includes a rigid bracket 31 fixedly installed on the mounting base 21, and the rigid bracket 31 is machined with a dovetail groove 32;

[0054] The tension adjusting slider 33 is slidably fitted in the dovetail groove 32, and a sector gear 34 is also mounted on the rigid bracket 31 via a bearing. The sector gear 34 can rotate around its bearing axis.

[0055] The linkage swing arm 24 is fixedly provided with a rack 35 that meshes with the sector gear 34. The angular displacement of the linkage swing arm 24 is achieved by the rack 35 and the sector gear 34 rotating.

[0056] The end face of the sector gear 34 is hinged to a first transmission link 36 at a point off-center from the center, and the tension adjusting slider 33 is hinged to a second transmission link 37. The other ends of the first transmission link 36 and the second transmission link 37 are connected to each other through a hinge shaft to form a planar linkage mechanism.

[0057] The tension adjusting slider 33 is equipped with a rotating shaft 38, and the tension guide roller 11 is installed on the rotating shaft 38. The longitudinal displacement of the tension adjusting slider 33 will be directly converted into the lifting and lowering changes of the tension guide roller 11, thereby changing the wrap angle of the aluminum alloy strip 6 on it.

[0058] When the operator rotates the adjusting screw 23 to change the roll gap, the movement of the guide slider 22 drives the linkage swing arm 24 to generate angular displacement around its axis through the guide groove 26. The rotation of the linkage swing arm 24 drives the rack 35 on it to move. The rack 35 drives the sector gear 34 meshing with it to generate a corresponding rotation angle. The rotation of the sector gear 34 drives the tension adjusting slider 33 to slide up or down along the dovetail groove 32 through the first transmission link 36 pulling the second transmission link 37.

[0059] When the rotating adjusting screw 23 moves the guide slider 22 downward, reducing the roll gap between the driven rolling roll 13 and the driving rolling roll 12, the rolling pressure increases, and the plastic deformation of the aluminum alloy strip 6 increases, resulting in an increase in its elongation. If no intervention is made, this elongation will extend to the unwinding end of the aluminum alloy strip 6, increasing the actual tension of the aluminum alloy strip 6 and increasing the risk of slippage and breakage.

[0060] The downward movement of the tension adjustment slider 33 causes the tension guide roller 11 to simultaneously lower its installation position, thereby reducing the wrap angle of the aluminum alloy strip 6 on the tension guide roller 11. This releases some of the tension on the aluminum alloy strip 6, compensates for the tension increment caused by the increase in rolling depth, and keeps the tension of the aluminum alloy strip 6 at the roll inlet within the set range, thus avoiding slippage.

[0061] When the rolling depth decreases, the tension guide roller 11 is driven by the tension adjustment slider 33 to increase the wrap angle to supplement the tension, maintain the tension of the aluminum alloy strip 6 during the conveying process, and avoid the stacking phenomenon caused by the relative sliding of the aluminum alloy strip 6 during the conveying process due to the loosening of the aluminum alloy strip 6.

[0062] In this embodiment, an elastic element 39, preferably a helical compression spring, is provided between the rigid support 31 and the tension adjusting slider 33. One end of the elastic element 39 acts on the rigid support 31, and the other end acts on the tension adjusting slider 33, applying a continuous elastic force to the tension adjusting slider 33.

[0063] The elastic element 39 provides an adjustable tension and buffer, making the equipment start-up and operation smoother, and can absorb small tension fluctuations from the unwinding end to improve rolling uniformity. When overload occurs during the rolling process, the elastic element 39 can be compressed, allowing the tension adjusting slider 33 to make a relief displacement, thereby releasing excessive tension and protecting the rolling roll from mechanical damage.

[0064] In this embodiment, an arc-shaped pressure plate 4 is arranged above the tension guide roller 11 in the feeding direction. The arc-shaped pressure plate 4 is made of elastic wear-resistant material. The protrusion of the arc-shaped pressure plate 4 faces the aluminum alloy strip 6 on the tension guide roller 11 and applies pre-tightening pressure perpendicular to the surface of the aluminum alloy strip 6 to enhance the adhesion between the aluminum alloy strip 6 and the tension guide roller 11.

[0065] To achieve adaptive control of the bow-shaped pressure plate 4, an opening and closing mechanism 41 is provided on the rotating shaft 38. The opening and closing mechanism 41 includes a fixed side plate 42 fixedly installed on the side wall of the conveyor frame 1. An arc-shaped mounting bracket 43 is sleeved on the rotating shaft 38. The arc-shaped mounting bracket 43 is slidably connected to the fixed side plate 42, so that the arc-shaped mounting bracket 43 moves along the fixed side plate 42 as the rotating shaft 38 rises and falls.

[0066] The inner side of the arc-shaped mounting bracket 43 is provided with an arc-shaped slot 44. Two inwardly snapping pressure blocks 45 are symmetrically hinged on both sides of the end of the arc-shaped pressure plate 4. The end of the arc-shaped pressure plate 4 is embedded between the two pressure blocks 45. When the two pressure blocks 45 rotate outward in the arc-shaped slot 44, they can drive the arc-shaped pressure plate 4 to be pulled outward.

[0067] The pressure block 45 is provided with a contact rod 46 extending toward the fixed side plate 42. On the side of the fixed side plate 42 facing the arc-shaped mounting bracket 43, two contour plates 47 corresponding to the pressure block 45 are fixedly provided. The edge of the contour plate 47 is constructed as a continuous wave-shaped curve, forming alternating peaks and troughs. The peaks and troughs constitute the movement path of the contact rod 46.

[0068] When the operator rotates the adjusting screw 23 to drive the rotating shaft 38 to raise and lower the tension guide roller 11 to adjust the tension, the arc-shaped mounting frame 43 moves synchronously and is guided by the wave-shaped curve of the contour plate 47. The contact rods 46 on the two pressure blocks 45 slide along the curved surface. When the contact rods 46 enter the adjacent slope section from the trough area, the pressure block 45 rotates around its hinge axis and unfolds outward. The bow-shaped pressure plate 4 between the two pressure blocks 45 will unfold and raise its bow-shaped protrusion, thereby separating from the surface of the aluminum alloy strip 6 passing below and releasing the pre-tightening pressure. During the dynamic adjustment of the tension guide roller 11, the bow-shaped pressure plate 4 will not form additional frictional resistance to the aluminum alloy strip 6, avoiding the scraping caused by the relative position change between the bow-shaped pressure plate 4 and the moving aluminum alloy strip 6 during the adjustment process. During the non-adjusted steady-state operation, the bow-shaped pressure plate 4 continuously provides stable clamping force, suppressing the lateral drift and longitudinal vibration of the strip and ensuring the smooth conveying of the aluminum alloy strip 6.

[0069] Once the tension adjustment is complete, when the rotating shaft 38 and the arc-shaped mounting bracket 43 stop at their new positions, the contact rod 46 remains in the trough area of ​​the wavy curve, and the pressure block 45 elastically resets without external contours, re-closes, and applies pre-tightening force to the surface of the aluminum alloy strip 6 by the protruding part of the bow-shaped pressure plate 4.

[0070] In this embodiment, a limiting sleeve 5 is sleeved on the outside of the adjusting screw 23. The limiting sleeve 5 is circumferentially fixed to the adjusting screw 23. A plurality of slots 51 are evenly distributed along the circumferential direction on the outer circumferential surface of the limiting sleeve 5.

[0071] The mounting base 21 is provided with a locking pin 52 mounting hole facing the limiting sleeve 5, and a manually operable locking pin 52 is installed in the locking pin 52 mounting hole.

[0072] When the adjusting screw 23 is rotated to the target position, the operator can push the locking pin 52 so that its end is inserted into the corresponding slot 51 on the limiting sleeve 5, which prevents the adjusting screw 23 from rotating during equipment operation vibration and ensures the long-term stability of the rolling depth.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling mill for producing metal strip, characterized in that, include: The conveyor frame (1) is sequentially equipped with tension guide rollers (11), active rolling rollers (12) and driven rolling rollers (13). The rolling depth adjustment assembly (2) is symmetrically set into two groups and arranged opposite each other on both sides of the conveyor frame (1) to adjust the roll gap between the driven rolling roll (13) and the driving rolling roll (12); Tension adjustment mechanism (3) is installed on rolling depth adjustment assembly (2) and connected to tension guide roller (11); The bow-shaped pressure plate (4) is arranged in the feeding direction of the tension guide roller (11) to apply pre-tightening pressure to the passing strip; The opening and closing mechanism (41) is linked with the tension adjustment mechanism (3) and is used to control the separation and pressing of the bow-shaped pressure plate (4) and the strip during the adjustment process; The rolling depth adjustment assembly (2) includes a mounting base (21) installed on the side wall of the conveyor frame (1); A rigid bracket (31) is mounted on a mounting base (21) and has a dovetail groove (32) machined on it. The tension adjustment slider (33) is slidably fitted into the dovetail groove (32); A rotating shaft (38) is mounted on a tension adjusting slider (33), and a tension guide roller (11) is mounted on the rotating shaft (38); the opening and closing mechanism (41) includes a fixed side plate (42) fixedly mounted on the side wall of the conveyor frame (1). An arc-shaped mounting bracket (43) is fitted onto the rotating shaft (38) and is slidably connected to the fixed side plate (42); An arc-shaped slot (44) is provided on the inside of the arc-shaped mounting bracket (43); Two pressure blocks (45) are symmetrically hinged in an arc-shaped slot (44), and the end of the bow-shaped pressure plate (4) is embedded between the two pressure blocks (45); The contact rod (46) extends onto the pressure block (45) and is positioned toward the fixed side plate (42); The contour plate (47), fixed to the fixed side plate (42), has a wavy curve with crests and troughs on its edge, which is used to guide the movement of the contact rod (46) and drive the pressure block (45) to open and close.

2. The rolling mill for producing metal strip according to claim 1, characterized in that: The rolling depth adjustment assembly (2) further includes: The guide slider (22) is slidably fitted to the side wall of the conveyor frame (1), and the driven rolling roll (13) is mounted on the guide slider (22); Adjusting screw (23) is installed on mounting base (21), and its lower end is connected to guide slider (22) for driving guide slider (22) to rise and fall; The linkage swing arm (24) is hinged to the mounting base (21) via a pivot shaft; A guide roller (25) is located at one end of the linkage arm (24); The guide slider (22) is machined with a guide groove (26), and the guide roller (25) is embedded in the guide groove (26); The linkage arm (24) and the tension adjustment mechanism (3) form a transmission connection.

3. A rolling mill for producing metal strip according to claim 2, characterized in that: A sector gear (34) is mounted on a rigid bracket (31); The rack (35) is fixedly mounted on the linkage swing arm (24) and meshes with the sector gear (34); The first transmission link (36) is hinged at one end to the eccentric position of the end face of the sector gear (34); The second transmission link (37) is hinged at one end to the tension adjusting slider (33) and at the other end to the free end of the first transmission link (36).

4. A rolling mill for producing metal strip according to claim 3, characterized in that: An elastic element (39) is provided between the rigid support (31) and the tension adjusting slider (33) to apply a continuous elastic force to the tension adjusting slider (33).

5. A rolling mill for producing metal strip according to claim 1, characterized in that: It also includes a limiting sleeve (5), which is sleeved on the outside of the adjusting screw (23) and fixed to it circumferentially. The outer surface of the limiting sleeve (5) is provided with multiple slots (51). The locking pin (52) is installed in the locking pin mounting hole on the mounting base (21) and is used to lock the adjusting screw (23).

6. A rolling mill for producing metal strip according to claim 5, characterized in that: When the rolling depth is adjusted to reduce the roll gap, the tension guide roller (11) is driven to move down to reduce the wrap angle of the aluminum alloy strip (6) and release the tension increment; When the rolling depth is adjusted to increase the roll gap, the driving tension guide roller (11) moves upward to increase the wrap angle of the aluminum alloy strip (6) and supplement the tension.

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