Control structure of aluminum alloy cast-rolling plate shape
By setting up casting rolls with a rotary body structure and cone table design on the rigging machine, the plate and strip are shaped and tied, and the plate wave problem during cold rolling is solved, and better plate flatness and production efficiency are achieved.
Patent Information
- Application Number
- CN202411438077.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-03-11
AI Technical Summary
In the production of a single machine double belt, it is easy to cause waves to the edges or ribs of the plate belt during cold rolling, which is difficult to meet the standard cast-rolled plate shape requirements.
The rotary body structure of cast rolls is adopted, with a small diameter at both ends and a large diameter at the middle. Two cast rolls are arranged parallel to each other on the treading machine. Through the characteristics of one end of the cone structure being large and the other end being small, the plate strip is shaped and tied to reduce the middle convexity.
It effectively reduces the mid-convex span of the plate belt, improves the flatness of the plate shape, and meets production needs.
Smart Images
Figure CN119588758A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cast-rolled aluminum alloy strips, and in particular to a control structure of an aluminum alloy cast-rolled plate shape. Background Art
[0002] According to the requirements of the national standard GB / T 33950-2017, the plate shape produced by twin-roll casting must ensure that the convex value of the plate strip is between 0-1%, so as to improve the efficiency of the subsequent cold rolling process and control the plate shape of the cold-rolled product.
[0003] Under the influence of the reaction of rolling force, the roller will bend and deform, and the middle part of the plate and strip will be thicker than its two sides, that is, a convexity will appear. The size of the convexity directly affects the quality of the plate shape in the subsequent cold rolling deep processing process.
[0004] In general enterprises, the order volume for producing wide plates and strips above 1750mm is relatively small, which makes it difficult to meet the continuous saturated production of 2300mm wide rolling mills. Therefore, in order to make full use of the production capacity of wide rolling mills above 2300mm, many manufacturers use one machine with two belts to produce plates and strips below 1100mm.
[0005] In actual production, the basic goal is to achieve a 0% strip convex value, and strive to achieve a flat strip. However, due to technical bottlenecks, it is difficult to produce a standard cast-rolled plate shape. The reason is the non-balanced change between the roll deflection and the roll convexity. It is difficult to produce a perfect flat plate. Basically, the strip ribs will be convex (thick) or concave (thin). During cold rolling, the edges or ribs will have waves due to the cast-rolled billet plate shape problem, and the plate shape is difficult to meet customer needs. Summary of the invention
[0006] In view of the technical problem that in the existing one-machine-two-strip production, waves will appear on the edges or ribs during cold rolling, and the plate shape is difficult to meet the requirements, the present invention provides a control structure for aluminum alloy cast-rolled plate shape, which has the advantage of being able to meet the plate shape requirements in the one-machine-two-strip production.
[0007] The technical solution of the present invention is:
[0008] A control structure for an aluminum alloy cast-rolled plate, comprising:
[0009] The casting roll is a rotating body structure, the diameter of the casting roll decreases linearly from the middle to the two ends, so that both ends of the casting roll are frustum structures, and the difference between the diameter of the middle part of the casting roll and the diameter of the end part is less than or equal to 0.6 mm;
[0010] There are two casting rolls which are symmetrically arranged parallel to each other and there is a gap between them.
[0011] Optionally, the difference between the middle diameter and the end diameter of the casting roll is greater than or equal to 0.2 mm.
[0012] Optionally, the difference between the middle diameter and the end diameter of the casting roll is 0.27 mm.
[0013] Optionally, when the frustum structures at both ends of the casting roll are of equal length, the angle between the generatrix at one end of the casting roll and its axis is 17.9″-53.9″.
[0014] Optionally, the butt joint of the two frustum structures on the casting roller is a convex point of the casting roller, and the convex point of the casting roller is close to one end of the casting roller.
[0015] Optionally, one end of the casting roller is end A, and when the convex point of the casting roller is close to end A, the angle between the generatrix from end A of the casting roller to the convex point and its axis is 41.2″-2′3.5″.
[0016] Optionally, one end of the casting roller is end B, and when the convex point of the casting roller is close to end A, the angle between the generatrix from end B of the casting roller to the convex point and its axis is 11.4″-34.3″.
[0017] Optionally, one end of the casting roller is dynamically connected to a transmission mechanism.
[0018] Optionally, the material of the casting roll is 12crmov, and the pressure between the two casting rolls is 350MPa-450MPa.
[0019] Optionally, the casting roll comprises an axis core and a roll sleeve detachably arranged on the axis core, and the outer surface of the roll sleeve is the frustum structure.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] In the technical solution, the casting roller of the rolling machine is set to a structure with small diameters at both ends and a large diameter in the middle, and two casting rollers are arranged parallel to each other on the rolling machine. During operation, two strips are placed between the two casting rollers and on the frustum structures at both ends of the casting rollers. By taking advantage of the characteristic of the frustum structure with one end larger than the other, the strip is shaped and the convexity of the strip is reduced to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a structural schematic diagram of the present invention;
[0024] Figure 2 It is a curve diagram of plate type data of the prior art;
[0025] Figure 3 This is the curve diagram of plate type data for this application;
[0026] Figure 4 This is another structural diagram of the present application. DETAILED DESCRIPTION
[0027] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0028] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0030] Example:
[0031] See also Figure 1 This embodiment discloses a control structure of an aluminum alloy cast plate, including a casting roller 10. Specifically, the casting roller 10 is a rotating body structure, and both ends of the casting roller 10 are frustum-shaped structures, so that the end diameter of the casting roller 10 is smaller than the middle diameter, and the diameter of the casting roller 10 increases linearly from the end to the middle, the diameters of the two ends of the casting roller 10 are equal, and the difference between the end diameter of the casting roller 10 and the middle diameter is less than or equal to 0.6mm. Among them, one end of the casting roller 10 is connected to the power of the transmission mechanism, and the other end of the casting roller 10 is the operating end. In addition, the material of the casting roller 10 is 12crmov, and the pressure between the two casting rollers 10 is 350MPa-450MPa.
[0032] Two casting rolls 10 are arranged parallel to each other on the rolling machine, and there is a gap between the two casting rolls 10. During the rolling process, the aluminum alloy strip 20 passes through the gap between the two casting rolls 10. The technical solution uses the characteristics of the frustum structure on the casting roll 10, which is large at one end and small at the other end, to roll the strip 20, thereby reducing the crown span of the strip 20, thereby meeting production requirements.
[0033] Preferably, the difference between the middle diameter and the end diameter of the casting roll 10 is greater than or equal to 0.2 mm.
[0034] In actual production, the length of the casting roll 10 is usually 2300 mm. The surface of the existing casting roll 10 is an arc-linear decomposition structure. The plate shape data of the rolled aluminum alloy plate strip 20 are shown in Table 1 below:
[0035] Serial number A-side 2-digit 3-digit 4-digit Median 6-digit 7-bit 8-bit B-side Convexity Difference between two ends 1 6.94 6.94 6.94 6.93 6.93 6.94 6.95 6.94 6.94 -0.14% 0 2 6.94 6.94 6.93 6.93 6.94 6.93 6.93 6.93 6.94 0.00% 0 3 6.95 6.95 6.95 6.95 6.94 6.94 6.94 6.94 6.95 -0.14% 0 4 6.93 6.92 6.92 6.91 6.93 6.92 6.92 6.91 6.92 0.09% 0.01 5 6.90 6.91 6.91 6.90 6.90 6.91 6.90 6.89 6.90 0.00% 0 6 6.95 6.95 6.95 6.94 6.93 6.94 6.94 6.94 6.95 -0.29% 0 7 6.95 6.94 6.94 6.93 6.94 6.94 6.94 6.94 6.96 -0.22% -0.01 8 6.95 6.96 6.96 6.96 6.95 6.96 6.96 6.96 6.94 0.07% 0.01 9 6.96 6.96 6.96 6.95 6.95 6.95 6.96 6.96 6.97 -0.22% -0.01 10 6.95 6.95 6.94 6.94 6.96 6.94 6.94 6.95 6.96 0.07% -0.01 11 6.96 6.96 6.96 6.95 6.96 6.95 6.96 6.96 6.97 -0.07% -0.01 12 6.97 6.97 6.96 6.95 6.97 6.95 6.96 6.97 6.97 0.00% 0 13 6.95 6.95 6.94 6.94 6.95 6.93 6.93 6.94 6.95 0.00% 0 14 6.97 6.96 6.96 6.96 6.98 6.96 6.96 6.96 6.97 0.14% 0 15 6.96 6.95 6.95 6.94 6.94 6.95 6.94 6.95 6.96 -0.29% 0
[0036] Table 1
[0037] In this Table 1, the A end 11 and the B end 12 are the two ends of the aluminum alloy strip 20, and positions 2 to 8 are different position detection points on the same direction of the aluminum alloy strip 20 (a direction perpendicular to the length direction of the aluminum alloy strip 20). The requirements in Table 1 are different positions in the length direction of the aluminum alloy strip 20, and the data units in Table 1 are millimeters.
[0038] According to the data in Table 1, it can be seen that the convexity of the aluminum alloy strip 20 produced by the rolling mill of the prior art has large fluctuations, the fluctuation range is between -0.29% and 0.09%, and the span reaches 0.38%.
[0039] According to the technical solution in this embodiment, after the casting roll 10 in the original rolling mill is replaced, the plate shape data of the rolled aluminum alloy plate strip 20 is as shown in Table 2:
[0040] Serial number A-side 2-digit 3-digit 4-digit Median 6-digit 7-bit 8-bit B-side Convexity Difference between the two sides 1 7.18 7.19 7.19 7.20 7.21 7.21 7.20 7.19 7.18 0.42% 0 2 7.16 7.17 7.17 7.19 7.20 7.19 7.18 7.17 7.17 0.49% -0.01 3 7.17 7.18 7.19 7.19 7.21 7.20 7.19 7.19 7.18 0.49% -0.01 4 7.16 7.17 7.19 7.18 7.19 7.18 7.17 7.17 7.16 0.42% 0 5 7.17 7.19 7.19 7.20 7.22 7.21 7.20 7.18 7.18 0.42% -0.01 6 7.18 7.19 7.19 7.20 7.21 7.21 7.20 7.19 7.17 0.49% 0.01 7 7.17 7.18 7.19 7.19 7.20 7.20 7.20 7.19 7.18 0.35% -0.01 8 7.17 7.19 7.20 7.20 7.21 7.20 7.19 7.19 7.18 0.49% -0.01 9 7.18 7.19 7.19 7.20 7.21 7.20 7.20 7.19 7.19 0.35% -0.01 10 7.17 7.18 7.18 7.19 7.20 7.19 7.19 7.18 7.18 0.35% -0.01 11 7.18 7.19 7.19 7.20 7.21 7.20 7.19 7.19 7.19 0.35% -0.01 12 7.18 7.19 7.19 7.20 7.21 7.20 7.19 7.18 7.18 0.42% 0 13 7.19 7.20 7.20 7.21 7.21 7.20 7.20 7.19 7.18 0.35% 0.01
[0041] Table 2
[0042] In this Table 2, the meaning of the relevant table headers and serial numbers are the same as those in Table 1. According to the data in Table 2, it can be seen that the convexity fluctuation of the aluminum alloy plate and strip 20 produced by the rolling mill of the present application is small, the fluctuation range is between 0.35% and 0.49%, and the span is only 0.14%.
[0043] The data in Table 1 and Table 2 are made into curve graphs respectively, and we can get Figure 2 and Figure 3 , it can be seen quite clearly that Figure 2 The curve in the Figure 3 The dispersion state of the middle curve can also confirm the conclusion that the present application can reduce the middle convexity span of the plate strip 20.
[0044] As a preferred embodiment, the difference between the middle diameter and the end diameter of the casting roll 10 is 0.27 mm.
[0045] In one specific embodiment:
[0046] Generally, a casting roll 10 of 2300 mm in length is used. When the two ends of the casting roll 10 are of equal length, that is, the lengths of the frustum structures at the two ends of the casting roll 10 are the same, the angle between the generatrix 14 at one end of the casting roll 10 and its axis is 17.9″-53.9″. By limiting the angle, the size of the end of the casting roll 10 is limited. When the angle is 17.9″, the difference between the middle diameter and the end diameter of the casting roll 10 is about 0.2 mm. When the angle is 53.9″, the difference between the middle diameter and the end diameter of the casting roll 10 is about 0.6 mm.
[0047] By controlling the small diameter difference of the casting roll 10, the shape of the aluminum alloy strip 20 can be controlled.
[0048] In another specific embodiment:
[0049] like Figure 4 As shown, the butt joint of the two frustum structures on the casting roll 10 is set as a convex point 13 on the surface of the casting roll 10, with one end of the casting roll 10 as the A end 11 and the other end as the B end 12, and the convex point 13 is close to the A end 11 or the B end 12. Thus, in the structural state of the casting roll 10, two aluminum alloy strips 20 with different widths can be rolled.
[0050] Preferably, when the convex point 13 of the casting roller 10 is close to the A end 11, the angle between the busbar 14 from the A end 11 of the casting roller 10 to the convex point 13 and its axis is 41.2″-2′3.5″. At this time, the angle between the busbar 14 from the B end 12 of the casting roller 10 to the convex point 13 and its axis is 11.4″-34.3″. Moreover, when the angle between the busbar 14 from the A end 11 of the casting roller 10 to the convex point 13 and its axis is 41.2″, the angle between the busbar 14 from the B end 12 of the casting roller 10 to the convex point 13 and its axis is 11.4″. When the angle between the busbar 14 from the A end 11 of the casting roller 10 to the convex point 13 and its axis is 2′3.5″, the angle between the busbar 14 from the B end 12 of the casting roller 10 to the convex point 13 and its axis is 34.3″.
[0051] According to the angle setting, when the distance between the A end 11 of the casting roll 10 and the convex point 13 is 500 mm, the diameter difference between the A end 11 or the B end 12 of the casting roll 10 and the convex point 13 is 0.2 mm-0.6 mm.
[0052] In another specific embodiment:
[0053] Since the protrusion 13 of the casting roller 10 can be at any position and a variety of casting rollers 10 need to be manufactured according to production requirements, the casting roller 10 is provided with an axis core and a plurality of roller sleeves detachably arranged on the axis core, and the outer surface of the roller sleeve is provided with two frustum structures, so that when the casting roller 10 needs to be replaced, only the roller sleeve needs to be replaced.
[0054] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.
Claims
1. A control structure for aluminum alloy cast plate, characterized in that: include: The casting roll is a rotating body structure, the diameter of the casting roll decreases linearly from the middle to the two ends, so that both ends of the casting roll are frustum structures, and the difference between the diameter of the middle part of the casting roll and the diameter of the end part is less than or equal to 0.6 mm; There are two casting rolls which are symmetrically arranged parallel to each other and there is a gap between them.
2. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: The difference between the middle diameter and the end diameter of the casting roll is greater than or equal to 0.2 mm.
3. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: The difference between the middle diameter and the end diameter of the casting roll is 0.27 mm.
4. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: When the frustum structures at both ends of the casting roll are of equal length, the angle between the generatrix at one end of the casting roll and its axis is 17.9″-53.9″.
5. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: The butt joint of the two frustum structures on the casting roller is a convex point of the casting roller, and the convex point of the casting roller is close to one end of the casting roller.
6. The control structure of the aluminum alloy cast-rolled plate according to claim 5, characterized in that: One end of the casting roll is end A. When the convex point of the casting roll is close to end A, the angle between the generatrix from end A to the convex point of the casting roll and its axis is 41.2″-2′3.5″.
7. The control structure of the aluminum alloy cast-rolled plate according to claim 6, characterized in that: One end of the casting roll is end B. When the convex point of the casting roll is close to end A, the angle between the generatrix from end B of the casting roll to the convex point and its axis is 11.4"-34.3".
8. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: One end of the casting roll is dynamically connected to the transmission mechanism.
9. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: The material of the casting roll is 12crmov, and the pressure between the two casting rolls is 350MPa-450MPa.
10. The control structure of the aluminum alloy cast-rolled plate according to claim 1, characterized in that: The casting roll comprises an axis core and a roll sleeve detachably arranged on the axis core, and the outer surface of the roll sleeve is the frustum structure.