Control structure of aluminum alloy cast-rolling plate shape

Abstract

The utility model provides a control structure for an aluminum alloy cast-rolling plate shape, and aims to solve the technical problems that in the existing one-machine double-belt production, waves are generated at the edge part or the rib part during cold rolling, and the plate shape is difficult to meet the requirements. The control structure comprises a casting roller which is of a rotary body structure, the diameter of the casting roller is linearly decreased from the middle to the two ends, so that the two ends of the casting roller are of frustum structures, and the difference between the diameter of the middle of the casting roller and the diameter of the ends of the casting roller is smaller than or equal to 0.6 mm; wherein the two casting rollers are symmetrically arranged in parallel, and a gap exists between the two casting rollers. In the working process, two plate strips are placed between the two casting rollers and located on the frustum structures at the two ends of the casting rollers respectively, the plate strips are rolled according to the characteristic that one ends of the frustum structures are large and the other ends of the frustum structures are small, and therefore the middle convexity of the plate strips is reduced, and the production requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-rolled aluminum alloy strips, in particular to a control structure for a cast-rolled aluminum alloy 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 the rolling force, the roller will bend and deform, and the middle part of the strip will be thicker than its two sides, that is, a convex shape will appear. The size of the convex shape 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 crown value, striving to achieve a flat strip. However, due to technical bottlenecks, it is difficult to produce a standard cast-rolled strip shape. This is due to the uneven variation between roll deflection and roll crown, making it difficult to produce a perfect flat strip. The strip often has convex (thick) or concave (thin) ribs. During cold rolling, this can cause ripples on the edges or ribs due to the cast-rolled billet's flatness, making it difficult to meet customer requirements. Utility Model Content

[0006] In order to solve 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 utility model 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 utility model 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 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 arranged parallel to each other and symmetrically, with 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 to the convex point of the casting roller 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, when the angle between the generatrix from the end A of the casting roll to the convex point and its axis is 2′3.5″, the angle between the generatrix from the end B of the casting roll to the convex point and its axis is 34.3″;

[0018] When the angle between the generatrix from the end A of the casting roll to the convex point and its axis is 41.2", the angle between the generatrix from the end B of the casting roll to the convex point and its axis is 11.4".

[0019] Optionally, one end of the casting roll is dynamically connected to a transmission mechanism.

[0020] Optionally, the casting roll includes an axis core and a roll sleeve detachably mounted on the axis core, and the outer surface of the roll sleeve is the frustum structure.

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

[0022] In this 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 set parallel to each other on the rolling machine. During operation, the two strips are placed between the two casting rollers and are respectively located on the frustum structure at both ends of the casting rollers. By taking advantage of the characteristic that one end of the frustum structure is large and the other end is small, the strip is shaped and the convexity of the strip is reduced to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a curve diagram of plate type data of the prior art;

[0026] Figure 3 This is the plate type data curve diagram for this application;

[0027] Figure 4 This is another structural diagram of this application. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0029] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example:

[0032] See also Figure 1This embodiment discloses a control structure for 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 diameter of the end of the casting roller 10 is smaller than the diameter of the middle, 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 diameter of the end of the casting roller 10 and the diameter of the middle is less than or equal to 0.6 mm. One end of the casting roller 10 is connected to the power 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.

[0033] Two casting rolls 10 are arranged parallel to each other on a rolling mill, with a gap between them. During the rolling process, an aluminum alloy strip 20 passes through the gap between the two casting rolls 10. This technical solution utilizes the frustum structure of the casting rolls 10, which is larger at one end and smaller at the other, to shape-roll the strip 20, thereby reducing the crown span of the strip 20 and meeting production requirements.

[0034] 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.

[0035] In actual production, the length of the casting roll 10 is usually 2300 mm. The surface of the existing casting roll 10 has an arc-linear decomposition structure. The plate shape data of the rolled aluminum alloy plate and strip 20 are shown in Table 1 below:

[0036] Serial number A-side 2 people 3 digits 4 digits median 6-digit 7-digit 8-bit B-side Crowning Difference between the 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

[0037] Table 1

[0038] In Table 1, end A 11 and end B 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 (the 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.

[0039] 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 fluctuates greatly, with the fluctuation range being between -0.29% and 0.09%, and the span reaching 0.38%.

[0040] According to the technical solution of this embodiment, after the casting roll 10 in the original rolling mill is replaced, the plate shape data of the rolled aluminum alloy plate and strip 20 are as shown in Table 2 below:

[0041] Serial number A-side 2 people 3 digits 4 digits median 6-digit 7-digit 8-bit B-side Crowning 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

[0042] Table 2

[0043] In 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 this application is small, and the fluctuation range is between 0.35% and 0.49%, with a span of only 0.14%.

[0044] 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 of the middle curve also confirms the conclusion that the present application can reduce the middle crown span of the plate strip 20.

[0045] As a preferred embodiment, the difference between the middle diameter and the end diameter of the casting roll 10 is 0.27 mm.

[0046] In one specific embodiment:

[0047] Typically, a 2300mm long casting roll 10 is used. When both ends of the casting roll 10 are equal in length, that is, the frustum structures at both ends of the casting roll 10 are the same length, the angle between the generatrix 14 at one end of the casting roll 10 and its axis is 17.9"-53.9". This angle limits the size of the end of the casting roll 10. When the angle is 17.9", the difference between the diameter of the middle and end portions of the casting roll 10 is approximately 0.2mm. When the angle is 53.9", the difference between the diameter of the middle and end portions of the casting roll 10 is approximately 0.6mm.

[0048] By controlling the small diameter difference of the casting rolls 10, the shape of the aluminum alloy strip 20 can be controlled.

[0049] In another specific embodiment:

[0050] 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 being the A end 11 and the other end being the B end 12, and the convex point 13 being close to the A end 11 or the B end 12. In this structural state of the casting roll 10, two aluminum alloy strips 20 of different widths can be rolled.

[0051] 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″, and 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″.

[0052] According to the angle setting, when the distance between the end 11 of the casting roll 10A and the convex point 13 is 500 mm, the diameter difference between the end 11 or the end 12 of the casting roll 10A and the convex point 13 is 0.2 mm-0.6 mm.

[0053] In another specific embodiment:

[0054] Since the protrusions 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 provided 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.

[0055] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection 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 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 arranged parallel to each other and symmetrically, with a gap between them.

2. The control structure of the aluminum alloy cast 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 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 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 plate according to claim 1, characterized in that: The butt joint of the two frustum structures on the casting roll is a convex point of the casting roll, and the convex point of the casting roll is close to one end of the casting roll.

6. The control structure of the aluminum alloy cast 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 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 to the convex point of the casting roll and its axis is 11.4"-34.3".

8. The control structure of the aluminum alloy cast plate according to claim 7, characterized in that: When the angle between the generatrix from the end A of the casting roll to the convex point and its axis is 2′3.5″, the angle between the generatrix from the end B of the casting roll to the convex point and its axis is 34.3″; When the angle between the generatrix from the end A of the casting roll to the convex point and its axis is 41.2", the angle between the generatrix from the end B of the casting roll to the convex point and its axis is 11.4".

9. The control structure of the aluminum alloy cast and rolled plate according to claim 1, characterized in that: One end of the casting roll is connected to the transmission mechanism.

10. The control structure of the aluminum alloy cast 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.

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