Aluminum alloy plate cold-rolling mill

Abstract

The invention relates to the technical field of cold rolling equipment, and discloses an aluminum alloy plate cold rolling mill which comprises a rack and a driven roller rotationally connected to the rack, two sliding blocks are connected to the rack in a sliding mode, a driving roller is rotationally connected between the two sliding blocks, and the driving roller is located over the driven roller. Fixing plates are fixedly mounted on the two sliding blocks, a guide rod is fixedly connected between the two fixing plates, a rotating shaft is rotatably connected between the two fixing plates, a plurality of sets of sliding frames are symmetrically and slidably connected between the guide rod and the rotating shaft, and the outer side of each sliding frame is rotatably sleeved with a limiting ring; the inner diameters and the outer diameters of the multiple limiting rings are sequentially increased from the middle to the two sides, and the adjacent limiting rings are matched in a nested mode. Transverse flowing of the aluminum alloy plate is limited through the limiting rings on the two sides, the gap between the limiting rings on the two sides can be completely filled with the limiting rings, and it is guaranteed that the edges on the two sides of the aluminum alloy plate are flat.

Description

Technical Field

[0001] This invention relates to the field of cold rolling equipment technology, specifically to a cold rolling mill for aluminum alloy sheets. Background Technology

[0002] High-quality aluminum alloy sheets are widely used in the manufacture of structures such as fuselage frames and bulkheads due to their excellent strength, corrosion resistance, toughness and fatigue resistance. They are used extensively in aviation, aerospace, automotive, machinery manufacturing, shipbuilding and chemical industries, and are a crucial structural material.

[0003] A cold rolling mill typically has two parallel drive rolls and driven rolls rotating on it. When rolling aluminum alloy sheets, the aluminum alloy sheets pass through the roll gap between the drive rolls and driven rolls. At the same time, the pressure from the drive rolls and driven rolls causes plastic deformation, making the aluminum alloy sheets thinner, thus achieving the rolling of aluminum alloy sheets.

[0004] However, existing equipment typically does not have limiting devices on both sides of aluminum alloy sheets when cold rolling them. This results in irregular edges on both sides of the sheet after rolling and extrusion, requiring additional edge treatment processes in subsequent processing, which increases the production process and reduces overall efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a cold rolling mill for aluminum alloy sheets to solve the problems mentioned in the above process.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A cold rolling mill for aluminum alloy sheets includes a frame and a driven roller rotatably connected to the frame. Two sliders are slidably connected to the frame, and a drive roller is rotatably connected between the two sliders, with the drive roller located directly above the driven roller. A fixed plate is fixedly installed on each of the two sliders, and a guide rod is fixedly connected between the two fixed plates. A rotating shaft is rotatably connected between the two fixed plates. Multiple sets of carriages are symmetrically slidably connected between the guide rod and the rotating shaft. A limiting ring is rotatably sleeved on the outer side of each carriage. The inner and outer diameters of the multiple limiting rings increase sequentially from the center to the sides, and adjacent limiting rings are nested together. The inner walls of the two limiting rings closest to the center are tangent to the bottom of the drive roller.

[0007] In a preferred embodiment of the aluminum alloy sheet cold rolling mill of the present invention, two hydraulic push rods are fixedly installed on the frame, and the telescopic ends of the two hydraulic push rods are respectively fixedly connected to the two sliders.

[0008] As a preferred embodiment of the cold rolling mill for aluminum alloy sheets of the present invention, wherein: an arc-shaped protrusion is fixedly installed on the outer side of the slide, an annular guide groove is provided on the inner side of the limiting ring, and the arc-shaped protrusion is slidably fitted in the annular guide groove.

[0009] In a preferred embodiment of the aluminum alloy sheet cold rolling mill of the present invention, a double-headed screw is rotatably provided between the two fixed plates, a first half-threaded sleeve and a second half-threaded sleeve are symmetrically slidably connected in the slide, the first half-threaded sleeve and the second half-threaded sleeve abut against each other to form a threaded sleeve that is screwed into the double-headed screw, and a spring is fixedly connected between the first half-threaded sleeve and the second half-threaded sleeve.

[0010] As a preferred embodiment of the cold rolling mill for aluminum alloy sheets of the present invention, trapezoidal push blocks are fixed on multiple sets of first and second semi-threaded sleeves, and push frames that slide through multiple slides are fixedly installed on the frame. A through hole is provided in the middle of the push frame, and the outer sides of the two trapezoidal push blocks in each set are slidably engaged with the side walls of the through hole. The length of the multiple sets of trapezoidal push blocks decreases sequentially from the middle to the sides, and the length difference between adjacent trapezoidal push blocks is consistent with the thickness of the corresponding limiting ring. The bottom height of the multiple sets of trapezoidal push blocks is consistent.

[0011] As a preferred embodiment of the cold rolling mill for aluminum alloy sheets of the present invention, wherein: a plurality of first semi-threaded sleeves and second semi-threaded sleeves from the middle to both sides are fixedly installed with a number of push rods increasing sequentially, the plurality of push rods are located above the corresponding trapezoidal push blocks, one end of the plurality of push rods slides through the corresponding slide frame, the ends of the plurality of push rods are hemispherical, and the hemispherical ends of the plurality of push rods slide in cooperation with the outer side of the push frame.

[0012] In a preferred embodiment of the cold rolling mill for aluminum alloy sheets described in this invention, the inner sides of the two limiting rings closest to the center are coaxially fixed with toothed rings, the two slides closest to the center are rotatably connected with rotating drums, the outer sides of the two rotating drums are coaxially fixed with gears, and the two gears and the two toothed rings are respectively meshed and connected.

[0013] In a preferred embodiment of the cold rolling mill for aluminum alloy sheets described in this invention, the ratio of the outer diameter of the drive roller to the inner diameter of the limiting ring closest to the center is equal to the ratio of the number of gear teeth to the number of teeth on the gear ring.

[0014] As a preferred embodiment of the cold rolling mill for aluminum alloy sheets of the present invention, the rotating shaft is provided with a sliding groove, and a protrusion that slides within the sliding groove is fixedly installed on the inner side of the rotating drum.

[0015] In a preferred embodiment of the aluminum alloy sheet cold rolling mill of the present invention, the rotating shaft and the drive roller are both coaxially fixed with pulleys at one end, and a belt is connected between the two pulleys for transmission.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention incorporates a limiting ring, a portion of which is located between the roll gap of the drive roller and the driven roller. This allows the position of the limiting rings on both sides to be adjusted according to the degree of lateral flow of the aluminum alloy sheet. This ensures that the lateral flow of the aluminum alloy sheet during rolling completely fills the gap between the limiting rings, guaranteeing the consistency of the lateral flow during rolling. This results in flat edges on both sides of the rolled aluminum alloy sheet, eliminating the need for additional edge treatment processes and ensuring production efficiency.

[0018] 2. In this invention, multiple limiting rings are stacked, and the limiting rings on both sides can slide symmetrically, so that multiple limiting rings can be combined to form gaps of different thicknesses and widths, thereby adapting to different sizes of roll gaps, and thus enabling the rolling of aluminum alloy sheets of different sizes and specifications.

[0019] 3. This invention uses a hydraulic push rod to drive a slider, which in turn moves the drive roller, thus adjusting the gap between the drive roller and the driven roller. Simultaneously, the slider moves the fixed plate, which in turn moves the first and second semi-threaded sleeves via a slide frame. This causes the trapezoidal push blocks on the first and second semi-threaded sleeves to move relative to the push frame. The push frame slides against the corresponding trapezoidal push blocks. Depending on the size of the gap, the slider moves the fixed plate to a corresponding height, ensuring that the outer sides of the longer trapezoidal push blocks near the center remain against the inner side of the push frame. This causes the corresponding first and second semi-threaded sleeves to contact and engage with the double-ended screw. Meanwhile, the shorter trapezoidal push blocks on both sides move below the push frame, causing the corresponding first and second semi-threaded sleeves to move away from each other and separate from the double-ended screw under the action of springs. When the double-ended screw is rotated, only the multiple limiting rings near the center move towards the gap, and the thickness of the overlapping rings corresponds to the size of the gap. This allows for adjustment of the overlap thickness of the multiple limiting rings while simultaneously adjusting the gap, resulting in high efficiency.

[0020] 4. This invention incorporates a push rod. After the corresponding trapezoidal push block moves below the push frame, the spring force causes the first and second semi-threaded sleeves to separate. After prolonged use, the spring is prone to permanent deformation due to fatigue, which can cause the first and second semi-threaded sleeves to remain in contact with the double-ended screw even after separation. This can interfere with the rotation of the double-ended screw. Therefore, when the slider moves the fixed plate downward, the first and second semi-threaded sleeves simultaneously move the push rod downward. When the spring undergoes fatigue deformation, a portion of the hemispherical end of the push rod will extend out of the slide. At this time, the movement of the push rod relative to the push frame causes the outer side of the push frame to contact the hemispherical end of the push rod and push the push rods on both sides, causing the first and second semi-threaded sleeves to move to both sides. This ensures that the first and second semi-threaded sleeves can still separate from the double-ended screw after the spring undergoes fatigue deformation, thus ensuring the stable operation of the equipment.

[0021] 5. This invention incorporates gears and gear rings. When the drive roller rotates, the shaft rotates synchronously via pulleys and belt transmission. The shaft drives the rotating drum to rotate via a sliding groove, which in turn drives the gear to rotate. This, in turn, causes the gear ring to rotate via meshing transmission. Furthermore, since the ratio of the outer diameter of the drive roller to the inner diameter of the closest limiting ring is equal to the ratio of the number of teeth on the gear to the number of teeth on the gear ring, and the inner walls of the two closest limiting rings are tangent to the bottom of the drive roller, the linear velocity of the drive roller is consistent with the linear velocity of the limiting rings. This ensures that during the rolling of the aluminum alloy sheet, the limiting rings and the aluminum alloy sheet move synchronously, reducing wear between them, extending the service life of the equipment, and ensuring the edge quality of the aluminum alloy sheet. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the first cross-sectional structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the second cross-sectional structure of the present invention.

[0026] Figure 5 for Figure 4 A magnified structural diagram at point A.

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the limiting ring assembly of the present invention.

[0028] Figure 7 This is a schematic diagram of the first cross-sectional structure of the limiting ring assembly of the present invention.

[0029] Figure 8 This is a schematic diagram of the second cross-sectional structure of the limiting ring assembly of the present invention.

[0030] Figure 9 for Figure 8 A magnified structural diagram at point B.

[0031] Figure 10 This is a schematic diagram of the third cross-sectional structure of the limiting ring assembly of the present invention.

[0032] Figure 11 for Figure 10 A magnified structural diagram at point C.

[0033] Figure 12 This is a schematic diagram of the first trapezoidal push block assembly three-dimensional structure of the present invention.

[0034] Figure 13 This is a schematic diagram of the three-dimensional structure of the second type of trapezoidal push block assembly of the present invention.

[0035] Figure 14 This is a schematic diagram of the three-dimensional structure of the third type of trapezoidal push block assembly of the present invention.

[0036] In the diagram: 1. Frame; 2. Drive roller; 21. Slider; 22. Hydraulic push rod; 3. Driven roller; 4. Limiting ring; 41. Fixing plate; 42. Carriage; 421. Arc-shaped protrusion; 43. Rotating shaft; 431. Gear; 432. Gear ring; 433. Pulley; 434. Belt; 435. Slide groove; 436. Rotary drum; 44. Push frame; 45. Double-ended screw; 451. First half-threaded sleeve; 452. Second half-threaded sleeve; 453. Spring; 454. Trapezoidal push block; 455. Push rod; 46. Guide rod. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description in order to avoid unnecessarily obscuring the invention.

[0038] Example 1, referring to Figure 1-11As a first embodiment of the present invention, an aluminum alloy sheet cold rolling mill is provided. This aluminum alloy sheet cold rolling mill includes a frame 1 and a driven roller 3 rotatably connected to the frame 1. Two sliders 21 are slidably connected on the frame 1, and a drive roller 2 is rotatably connected between the two sliders 21. The drive roller 2 is located directly above the driven roller 3. A fixing plate 41 is fixedly installed on each of the two sliders 21. A guide rod 46 is fixedly connected between the two fixing plates 41. A rotating shaft 43 is rotatably connected between the two fixing plates 41. Multiple sets of slides 42 are symmetrically slidably connected between the guide rod 46 and the rotating shaft 43. A limiting ring 4 is rotatably sleeved on the outer side of each slide 42. The inner diameter and outer diameter of the multiple limiting rings 4 increase sequentially from the middle to the sides, and adjacent limiting rings 4 are nested together. The inner walls of the two limiting rings 4 closest to the middle are tangent to the bottom of the drive roller 2.

[0039] Two hydraulic push rods 22 are fixedly installed on the frame 1, and the telescopic ends of the two hydraulic push rods 22 are fixedly connected to the two sliders 21 respectively.

[0040] During use, the size of the gap between the drive roller 2 and the driven roller 3 is adjusted according to the thickness of the aluminum alloy sheet to be rolled. The specific operation is as follows: the hydraulic push rod 22 is activated at the same time to extend the telescopic end, so that the two sliders 21 move down synchronously on the frame 1, so that the two sliders 21 drive the drive roller 2 to move down and get closer to the driven roller 3, thereby adjusting the size of the gap between the drive roller 2 and the driven roller 3. Initially, multiple limiting rings 4 are located on both sides of the drive roller 2. At this time, based on the size of the roll gap between the drive roller 2 and the driven roller 3, multiple limiting rings 4 near the center are stacked together, and the stacking thickness of multiple limiting rings 4 is equal to the size of the roll gap between the drive roller 2 and the driven roller 3. Then, the multiple limiting rings 4 stacked together on both sides are moved towards the center, so that the multiple limiting rings 4 stacked together are moved to the roll gap between the drive roller 2 and the driven roller 3. At the same time, the gap width between the two sets of limiting rings 4 on both sides is controlled. This width can be achieved by rolling the aluminum alloy sheet without limiting rings 4, judging the average lateral flow of the aluminum alloy sheet based on the rolling result, and adjusting the gap width between the two sets of limiting rings 4 on both sides. This ensures that the aluminum alloy sheet has a certain space for reasonable lateral flow during the rolling process, and avoids excessive relative force between the aluminum alloy sheet and the limiting rings 4 during the rolling process, which could lead to deformation and damage of the limiting rings 4 or the aluminum alloy sheet. Next, the aluminum alloy sheet to be rolled is introduced into the gap between the drive roller 2 and the driven roller 3 from one side. The pressure of the drive roller 2 and the driven roller 3 causes the aluminum alloy sheet to undergo plastic deformation. At the same time, the lateral flow of the aluminum alloy sheet during rolling can completely fill the gap between the two sets of limiting rings 4 on both sides, ensuring the consistency of the lateral flow of the aluminum alloy sheet during rolling. This makes the edges of the rolled aluminum alloy sheet flat on both sides. Then, the aluminum alloy sheet is removed from the other side of the drive roller 2 and the driven roller 3, thus completing the rolling of the aluminum alloy sheet. The edges of the rolled aluminum alloy sheet are flat, and no additional edge treatment process is required, ensuring production efficiency.

[0041] The two sets of multiple limiting rings 4 on both sides are stacked, allowing the multiple limiting rings 4 to form different stacking thicknesses, thereby matching the roll gap size between different drive rollers 2 and driven rollers 3, for producing aluminum alloy sheets of different thicknesses. In addition, the symmetrical sliding of the multiple limiting rings 4 on both sides allows the stacked multiple limiting rings 4 to form gaps of different widths, for producing aluminum alloy sheets of different widths. In this way, by stacking and moving the multiple limiting rings 4, aluminum alloy sheets of different sizes can be rolled, increasing the practicality and adaptability of the equipment.

[0042] Example 2, refer to Figure 1-14 This is the second embodiment of the present invention, which differs from the first embodiment in that: A double-headed screw 45 is rotatably provided between two fixed plates 41. A first half-threaded sleeve 451 and a second half-threaded sleeve 452 are symmetrically slidably connected inside the slide 42. The first half-threaded sleeve 451 and the second half-threaded sleeve 452 abut against each other to form a threaded sleeve that is screwed into the double-headed screw 45. A spring 453 is fixedly connected between the first half-threaded sleeve 451 and the second half-threaded sleeve 452.

[0043] Trapezoidal push blocks 454 are fixed on multiple sets of first semi-threaded sleeves 451 and second semi-threaded sleeves 452. A push frame 44 that slides through multiple slides 42 is fixedly installed on the frame 1. A through hole is provided in the middle of the push frame 44. The outer sides of the two trapezoidal push blocks 454 in each set slide and engage with the side walls of the through hole respectively. The length of the multiple sets of trapezoidal push blocks 454 decreases from the middle to the sides, and the length difference of adjacent trapezoidal push blocks 454 is consistent with the thickness of the corresponding limiting ring 4. The bottom height of the multiple sets of trapezoidal push blocks 454 is consistent.

[0044] Multiple sets of first semi-threaded sleeves 451 and second semi-threaded sleeves 452 from the middle to both sides are fixedly installed with an increasing number of push rods 455. The multiple sets of push rods 455 are located above the corresponding trapezoidal push blocks 454. One end of each set of push rods 455 slides through the corresponding slide frame 42. The ends of the multiple sets of push rods 455 are hemispherical, and the hemispherical ends of the multiple sets of push rods 455 slide in cooperation with the outer side of the push frame 44.

[0045] During use, multiple limiting rings 4 on both sides are stacked and located on both sides of the drive roller 2. When the hydraulic push rod 22 pushes the slider 21 down to adjust the roller gap between the drive roller 2 and the driven roller 3, the two sliders 21 synchronously drive the two fixed plates 41 down, so that the two fixed plates 41 drive all the slides 42 down through the guide rod 46 and the rotating shaft 43. When the slides 42 move down, they drive the corresponding limiting rings 4 down, and at the same time, the slides 42 drive the first half-threaded sleeve 451 and the second half-threaded sleeve 452, which are slidably connected inside, to move down. The push frame 44 is fixed on the frame 1. Therefore, the downward movement of the first half-threaded sleeve 451 and the second half-threaded sleeve 452 causes the corresponding trapezoidal push block 454 to move down, so that multiple trapezoidal push blocks 454 move down relative to the push frame 44. Preferably, this embodiment only shows three sets of trapezoidal push blocks 454. Figure 9-14 As shown, the multiple trapezoidal push blocks 454 of varying lengths from the middle to the outside are trapezoidal push block 454a, trapezoidal push block 454b, and trapezoidal push block 454c, respectively. If the size of the gap between the driving roller 2 and the driven roller 3 corresponds to the thickness of the stacked limiting rings 4 corresponding to trapezoidal push blocks 454a and 454b, when the slider 21 moves down to complete the adjustment of the gap size between the driving roller 2 and the driven roller 3, trapezoidal push blocks 454a and 454c... Both b and trapezoidal push block 454c move downward relative to push bracket 44 and stop at the corresponding height position. At this time, the outer sides of the longer trapezoidal push blocks 454a and 454b are still in contact with the inner wall of the through hole of push bracket 44, so that the corresponding first half-threaded sleeve 451 and second half-threaded sleeve 452 are still tightly fitted, so that the threaded sleeve formed by the combination of the corresponding first half-threaded sleeve 451 and second half-threaded sleeve 452 is screwed onto the outside of the double-ended screw 45, while the shorter one... The trapezoidal pusher 454c has moved to the bottom of the pusher frame 44. At this time, the first half-threaded sleeve 451 and the second half-threaded sleeve 452 where the trapezoidal pusher 454c is located are separated under the elastic force of the spring 453, so that the corresponding first half-threaded sleeve 451 and the second half-threaded sleeve 452 are separated from the double-headed screw 45. Subsequently, when the double-headed screw 45 is driven to rotate by an external motor, only the two sets of first half-threaded sleeves 451 and second half-threaded sleeves 452 corresponding to the trapezoidal pusher 454a and the trapezoidal pusher 454b move towards the middle along the double-headed screw 45. At this time, the thickness of the limiting rings 4 corresponding to the trapezoidal pusher 454a and the trapezoidal pusher 454b stacked together matches the size of the roll gap between the drive roller 2 and the driven roller 3. The length difference of adjacent trapezoidal pushers 454 is consistent with the thickness of the limiting rings 4. This allows the adjustment of the stacked thickness of multiple limiting rings 4 to be realized simultaneously while adjusting the size of the roll gap between the drive roller 2 and the driven roller 3, which is highly efficient.

[0046] Furthermore, after the corresponding trapezoidal push block 454 moves to the bottom of the push frame, the elastic force of the spring 453 causes the first half-threaded sleeve 451 and the second half-threaded sleeve 452 to separate. After long-term use, the spring 453 is prone to permanent deformation due to compression fatigue, which can lead to a decrease in the distance between the first half-threaded sleeve 451 and the second half-threaded sleeve 452 after separation. This causes the corresponding first half-threaded sleeve 451 and the second half-threaded sleeve 452 to still abut against the outer part of the double-ended screw 45, thereby interfering with the rotation of the double-ended screw 45. This can lead to wear on the double-ended screw 45 or movement of the limit ring 4, which does not need to move, making the equipment unable to operate normally. Therefore, when the slider 21 moves the fixed plate 41 downward, the slide 42 moves the corresponding first half-threaded sleeve 451 and the second half-threaded sleeve 452 downward. At the same time, the first half-threaded sleeve 451 and the second half-threaded sleeve 452 move downward. The threaded sleeve 451 and the second half-threaded sleeve 452 drive the corresponding push rod 455 to move downwards. When the spring 453 undergoes fatigue deformation, the separation distance between the first half-threaded sleeve 451 and the second half-threaded sleeve 452 becomes smaller, causing part of the hemispherical end of the corresponding push rod 455 to extend out of the slide 42. At this time, the downward movement of the first half-threaded sleeve 451 and the second half-threaded sleeve 452 causes the push rod 455 to move downwards relative to the push frame 44, causing the outer side of the push frame 44 to abut against the hemispherical end of the push rod 455. During the movement, the push rods 455 on both sides are pushed, forcing the first half-threaded sleeve 451 and the second half-threaded sleeve 452 to move to both sides. This ensures that after the spring 453 undergoes fatigue deformation, the first half-threaded sleeve 451 and the second half-threaded sleeve 452 can still separate from the double-ended screw 45, ensuring that there is no interference between the first half-threaded sleeve 451 and the second half-threaded sleeve 452 and the double-ended screw 45, thus ensuring the stable operation of the equipment.

[0047] The first semi-threaded sleeve 451 and the second semi-threaded sleeve 452 have different numbers of push rods 455, so that while adjusting the stacking thickness of multiple limiting rings 4, the pusher 44 can always abut against one of the sets of push rods 455, thereby ensuring that the first semi-threaded sleeve 451 and the second semi-threaded sleeve 452 corresponding to the multiple limiting rings 4 at different stacking thicknesses can always be completely separated from the double-ended screw 45, ensuring that there is no interference.

[0048] The remaining structure is the same as that in Example 1.

[0049] Example 3, referring to Figure 1-7 This is the third embodiment of the present invention, which differs from the second embodiment in that: An arc-shaped protrusion 421 is fixedly installed on the outer side of the slide 42, and an annular guide groove is provided on the inner side of the limiting ring 4. The arc-shaped protrusion 421 slides within the annular guide groove.

[0050] The inner sides of the two limiting rings 4 closest to the center are coaxially fixed with toothed rings 432, and the two slides 42 closest to the center are rotatably connected with rotating cylinders 436. The outer sides of the two rotating cylinders 436 are coaxially fixed with gears 431, and the two gears 431 and the two toothed rings 432 are meshed and connected respectively.

[0051] The ratio of the outer diameter of the drive roller 2 to the inner diameter of the limiting ring 4 closest to the center is equal to the ratio of the number of teeth of the gear 431 to the number of teeth of the gear ring 432.

[0052] The rotating shaft 43 is provided with a sliding groove 435, and a protrusion that slides within the sliding groove 435 is fixedly installed on the inner side of the rotating cylinder 436.

[0053] Both the rotating shaft 43 and the drive roller 2 are coaxially fixed with pulleys 433 at one end, and a belt 434 is connected between the two pulleys 433 for transmission.

[0054] During use, in the rolling process of aluminum alloy sheet, the drive roller 2 is driven to rotate by an external motor. When the drive roller 2 rotates, it drives the corresponding pulley 433 to rotate. Thus, through the transmission of belt 434, another pulley 433 drives the rotating shaft 43 to rotate. When the rotating shaft 43 rotates, it drives the rotating drum 436 to rotate through the slide groove 435 and the protrusion on the rotating drum 436. In turn, the rotating drum 436 drives the gear 431 to rotate. The gear 431 and the gear ring 432 mesh and drive the gear ring 432 to drive the limiting ring 4 to rotate. The limiting ring 4 then passes through the annular guide groove and the slide. The arc-shaped protrusion 421 of the slide 42 rotates on the outside of the slide 42. Since the ratio of the outer diameter of the drive roller 2 to the inner diameter of the limiting ring 4 closest to the center is equal to the ratio of the number of teeth of the gear 431 to the number of teeth of the gear ring 432, the inner walls of the two limiting rings 4 closest to the center are tangent to the bottom of the drive roller 2, so that the linear velocity of the drive roller 2 is consistent with the linear velocity of the limiting ring 4. In this way, when rolling the aluminum alloy sheet, the limiting ring 4 moves synchronously with the aluminum alloy sheet, so as to reduce the wear between the limiting ring 4 and the aluminum alloy sheet, extend the service life of the equipment, and ensure the edge quality of the aluminum alloy sheet.

[0055] Preferably, there are corresponding fixing rods and insertion holes between adjacent limiting rings 4. Initially, multiple limiting rings 4 are located on both sides of the drive roller 2. At this time, the fixing rods on the adjacent limiting rings 4 are inserted into the corresponding insertion holes to achieve coaxial fixation and limiting between adjacent limiting rings 4. This allows all the nested limiting rings 4 to rotate by simply driving the limiting ring 4 closest to the center. The structure is simple and the equipment manufacturing cost is low.

[0056] The remaining structure is the same as that in Example 2.

[0057] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art, based on a study of the drawings, specification, and claims, should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A cold rolling mill for aluminum alloy sheets, characterized in that: The assembly includes a frame (1) and a driven roller (3) rotatably connected to the frame (1). Two sliders (21) are slidably connected to the frame (1). A drive roller (2) is rotatably connected between the two sliders (21), and the drive roller (2) is located directly above the driven roller (3). A fixing plate (41) is fixedly installed on each of the two sliders (21). A guide rod (46) is fixedly connected between the two fixing plates (41). A rotating shaft (43) is rotatably connected between the two fixing plates (41). Multiple sets of slides (42) are symmetrically slidably connected between the guide rod (46) and the rotating shaft (43). A limiting ring (4) is rotatably sleeved on the outer side of each slide (42). The inner and outer diameters of the multiple limiting rings (4) increase sequentially from the middle to both sides. Adjacent limiting rings (4) are nested together. The inner walls of the two limiting rings (4) closest to the middle are tangent to the bottom of the drive roller (2).

2. The aluminum alloy sheet cold rolling mill according to claim 1, characterized in that: Two hydraulic push rods (22) are fixedly installed on the frame (1), and the telescopic ends of the two hydraulic push rods (22) are respectively fixedly connected to the two sliders (21).

3. The cold rolling mill for aluminum alloy sheets according to claim 1, characterized in that: The slide (42) is fixedly installed with an arc-shaped protrusion (421) on the outside, and the inner side of the limiting ring (4) is provided with an annular guide groove. The arc-shaped protrusion (421) is slidably fitted in the annular guide groove.

4. The cold rolling mill for aluminum alloy sheets according to claim 1, characterized in that: A double-ended screw (45) is rotatably provided between the two fixed plates (41). A first half-threaded sleeve (451) and a second half-threaded sleeve (452) are symmetrically slidably connected inside the slide (42). The first half-threaded sleeve (451) and the second half-threaded sleeve (452) abut against each other to form a threaded sleeve that is screwed into the double-ended screw (45). A spring (453) is fixedly connected between the first half-threaded sleeve (451) and the second half-threaded sleeve (452).

5. The cold rolling mill for aluminum alloy sheets according to claim 4, characterized in that: A trapezoidal push block (454) is fixed on each of the first half-threaded sleeve (451) and the second half-threaded sleeve (452). A push frame (44) that slides through multiple slides (42) is fixedly installed on the frame (1). A through hole is provided in the middle of the push frame (44). The outer sides of the two trapezoidal push blocks (454) in each group are slidably engaged with the side walls of the through hole. The length of the trapezoidal push blocks (454) decreases from the middle to the sides. The length difference between adjacent trapezoidal push blocks (454) is consistent with the thickness of the corresponding limiting ring (4). The bottom height of the trapezoidal push blocks (454) is consistent.

6. The cold rolling mill for aluminum alloy sheets according to claim 5, characterized in that: Multiple sets of first semi-threaded sleeves (451) and second semi-threaded sleeves (452) from the middle to both sides are fixedly installed with an increasing number of push rods (455). The multiple sets of push rods (455) are located above the corresponding trapezoidal push blocks (454). One end of each set of push rods (455) slides through the corresponding slide frame (42). The ends of the multiple sets of push rods (455) are hemispherical. The hemispherical ends of the multiple sets of push rods (455) slide in cooperation with the outer side of the push frame (44).

7. The cold rolling mill for aluminum alloy sheets according to claim 1, characterized in that: The inner sides of the two limiting rings (4) closest to the center are coaxially fixed with toothed rings (432), and the two slides (42) closest to the center are rotatably connected with rotating cylinders (436). The outer sides of the two rotating cylinders (436) are coaxially fixed with gears (431), and the two gears (431) and the two toothed rings (432) are meshed and connected respectively.

8. The cold rolling mill for aluminum alloy sheets according to claim 7, characterized in that: The ratio of the outer diameter of the drive roller (2) to the inner diameter of the limiting ring (4) closest to the center is equal to the ratio of the number of teeth of the gear (431) to the number of teeth of the gear ring (432).

9. The cold rolling mill for aluminum alloy sheets according to claim 7, characterized in that: The rotating shaft (43) is provided with a sliding groove (435), and a protrusion that slides in the sliding groove (435) is fixedly installed on the inner side of the rotating cylinder (436).

10. The cold rolling mill for aluminum alloy sheets according to claim 9, characterized in that: The rotating shaft (43) and the drive roller (2) are both coaxially fixed with pulleys (433) at one end, and a belt (434) is connected between the two pulleys (433).

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