Corrugated roller and rolling system

Abstract

The invention discloses a corrugated roller and a rolling system, relates to the field of metal plate rolling, and aims to solve the problems of obvious anisotropy and low bonding strength of a metal laminated plate rolled by a traditional flat roller. According to the corrugated roller, a roller sleeve with a corrugated structure is arranged on a mandrel in a sleeving mode, the corrugated structure is provided with a plurality of left spiral lines and a plurality of right spiral lines which are distributed in an interlaced mode, an interlacing area of every two adjacent left spiral lines and every two adjacent right spiral lines is provided with a unit protruding block, and a plurality of unit protruding blocks are arranged on the roller face in an array mode; and the mandrel and the roller sleeve are connected and fixed by the fastener. The flow rule that metal mainly extends in the rolling direction in the traditional flat roller rolling process is changed through the corrugated structure of the roller sleeve, so that the metal on the surface of the plate obliquely and crossly flows along the left spiral line and the right spiral line on the corrugated structure, and a strong texture formed by the plate in the rolling direction under the strong extrusion action of the roller is restrained and weakened; and the anisotropy problem of the rolled plate is solved, and the bonding strength of the rolled metal laminated plate is improved.

Description

Technical Field

[0001] The invention relates to the field of metal plate rolling, and in particular to a corrugated roller and a rolling system. Background Art

[0002] At present, metal laminates are a composite material made of two or more metal materials superimposed through specific composite technology. Usually, their overall strength, stiffness, corrosion resistance, electrical properties and magnetic properties are significantly improved. They can withstand large loads and moments and effectively resist corrosion and oxidation.

[0003] Usually, the interface layer in metal laminates usually needs to form a metallurgical bond to ensure good strength and connectivity, prevent interlayer peeling and delamination, and improve the stability and reliability of the overall structure. According to different material properties and application requirements, there are various manufacturing methods for metal laminates, including rolling composite method, explosion welding method, diffusion welding method, brazing composite method, etc. The rolling method is simple, efficient, energy-saving and environmentally friendly, but in its manufacturing and application process, there are still problems such as low bonding strength, large residual stress, severe warping and edge cracking, poor microstructure control, and poor secondary formability. Summary of the invention

[0004] The object of the present invention is to provide a corrugated roller and a rolling system for improving the bonding strength of rolled metal laminates.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a corrugated roller, comprising:

[0006] Mandrel;

[0007] A roller sleeve is sleeved on the core shaft, and the roller surface of the roller sleeve has a corrugated structure, the corrugated structure has a plurality of left spiral lines and a plurality of right spiral lines that are interlaced and distributed, and the interlaced area of ​​each two adjacent left spiral lines and each two adjacent right spiral lines has a unit convex block, and the plurality of unit convex blocks are arranged in an array on the roller surface;

[0008] Fasteners are used to connect and fix the mandrel and the roller sleeve.

[0009] Optionally, in the above-mentioned corrugated roller, both the right helix and the left helix are cylindrical helices, and the parameter equation of the right helix is:

[0010]

[0011] Among them, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n1 is the number of heads of the right helix, β1 is the helix angle between the right helix and the axis of the roller sleeve,

[0012] The parametric equation of the left helix is:

[0013]

[0014] Wherein, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix or the width of the roller sleeve along its axial direction, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n2 is the number of heads of the left helix, β2 is the helix angle between the left helix and the axis of the roller sleeve,

[0015] And the left helix and the right helix satisfy the following conditions:

[0016] θ1=θ2;

[0017]

[0018] Optionally, in the above-mentioned corrugated roller, the cross-sectional profiles of the plurality of unit protrusions along the direction perpendicular to the left spiral line include sawtooth or wave shapes;

[0019] And / or, the cross-sectional profiles of the plurality of unit protrusions along a direction perpendicular to the right spiral line include a sawtooth shape or a wavy shape.

[0020] Optionally, in the above-mentioned corrugated roller, the angle formed by two sides of each unit tooth shape on the cross-sectional profile is greater than or equal to 60°.

[0021] Optionally, in the above-mentioned corrugated roller, the distance between the peak point and the valley point of the cross-sectional profile in the radial direction of the roller sleeve is 3 mm to 5 mm.

[0022] Optionally, in the above-mentioned corrugated roller, the mandrel and the roller sleeve are key-connected, and the fastener comprises:

[0023] The key block, the roller sleeve and the mandrel are connected by the key block key;

[0024] Two retaining rings are both sleeved on the core shaft, and the two retaining rings are respectively located at two ends of the roller sleeve, and each retaining ring has a plurality of mounting holes;

[0025] The screws correspond to the mounting holes one by one, and the screws pass through the mounting holes to be fixedly connected with the core shaft.

[0026] Optionally, in the above-mentioned corrugated roller, the distance from the surface where the valley point of the corrugated structure is located to the axis of the core shaft is greater than the outer diameter of the retaining ring.

[0027] Optionally, in the above-mentioned corrugated roller, the core shaft and the roller sleeve are an integrally formed structure.

[0028] Compared with the prior art, when the above technical scheme is adopted, the corrugated structure of the roller sleeve has a plurality of unit protrusions arranged in an array, and the roller sleeve with the corrugated structure is fixedly connected to the core shaft by fasteners. Compared with the traditional flat roll rolling, the unit protrusions of the corrugated structure in the present application can change the flow law of the metal mainly extending along the rolling direction during the traditional flat roll rolling process, so that the metal on the surface of the plate flows obliquely along the left spiral line and the right spiral line on the corrugated structure, thereby suppressing and weakening the strong texture formed along the rolling direction of the plate under the strong extrusion of the roller, improving the anisotropy problem of the rolled plate, and improving the bonding strength of the rolled metal laminate.

[0029] In the second aspect, the present invention also provides a rolling system, including two driving devices, a flat roll group and a corrugated roll group, the flat roll group is composed of two flat rolls arranged at intervals, and the corrugated roll group is composed of two corrugated rollers arranged at intervals as any of the above items, the two driving devices are used to drive the rotation of the flat roll group and the rotation of the corrugated roll group respectively, the first plate and the second plate are stacked to form a composite slab, and the corrugated roll group and the flat roll group are used to apply rolling force to the composite slab to complete rolling.

[0030] Optionally, in the above rolling system, the ratio between the thickness of the composite slab and the amplitude of the left spiral line on the roller sleeve and the ratio between the thickness of the composite slab and the amplitude of the right spiral line on the roller sleeve are the same, and the ratios are both 2 to 5.

[0031] Compared with the prior art, the rolling system provided by the present invention applies the corrugated roller in the above technical solution to perform rolling work, and its beneficial effects are the same as the beneficial effects of the corrugated roller in the above technical solution, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 A schematic structural diagram of a corrugated roller provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 Exploded diagram of

[0035] Figure 3 for Figure 1 A cross-sectional view of

[0036] Figure 4 It is a schematic plan view of a corrugated structure of a roller sleeve of a corrugated roller provided in an embodiment of the present invention;

[0037] Figure 5 for Figure 4Middle AA section view;

[0038] Figure 6 for Figure 5 A local enlarged view of point B in FIG.

[0039] Reference numerals:

[0040] 1- mandrel; 2- roller sleeve; 21- left helix; 22- right helix; 23- unit protrusion; 24- guide groove; 3- fastener; 31- key block; 32- retaining ring; 33- screw; 331- mounting hole. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0044] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] like Figure 1-Figure 6 As shown, a corrugated roller provided in an embodiment of the present invention includes: a core shaft 1, a roller sleeve 2 and a fastener 3.

[0047] Among them, the roller sleeve 2 is sleeved on the core shaft 1, and the roller surface of the roller sleeve 2 has a corrugated structure, on which multiple left spiral lines 21 and multiple right spiral lines 22 are intertwined and distributed, and the intertwined area of ​​two adjacent left spiral lines 21 and two adjacent right spiral lines 22 has a unit protrusion 23, and multiple unit protrusions 23 are arranged in an array on the roller surface; the fastener 3 is used to connect and fix the core shaft 1 and the roller sleeve 2.

[0048] When implementing it, Figure 1 As shown, the corrugated structure of the roller sleeve 2 has a plurality of unit protrusions 23 arranged in an array, wherein the plurality of unit protrusions 23 are formed by sweeping based on the roller surface and selecting a cross-sectional shape with each left spiral line 21 and each right spiral line 22 as guide lines, so that the plurality of unit protrusions 23 are arranged in an array on the roller surface, and the roller sleeve 2 with the corrugated structure is fixedly connected to the core shaft 1 by the fastener 3. Compared with the traditional flat roll rolling, the corrugated structure in the present application can change the flow law of the metal mainly extending along the rolling direction during the traditional flat roll rolling process, so that the metal on the surface of the metal laminate flows obliquely along the left spiral line 21 and the right spiral line 22 on the corrugated structure, thereby suppressing and weakening the strong texture formed along the rolling direction of the metal laminate under the strong extrusion of the roller, improving the anisotropy problem of the rolled metal laminate, and improving the bonding strength of the rolled metal laminate.

[0049] Specifically, in this embodiment, the right helix 22 and the left helix 21 are both cylindrical helices, and the parameter equation of the right helix 22 is:

[0050]

[0051] Among them, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n1 is the number of heads of the right helix 22, β1 is the helix angle between the right helix 22 and the axis of the roller sleeve 2,

[0052] The parametric equation of the left helix 21 is:

[0053]

[0054] Wherein, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix or the width of the roller sleeve 2 along its axial direction, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n2 is the number of heads of the left helix 21, β2 is the helix angle between the left helix 21 and the axis of the roller sleeve 2,

[0055] And the left helix 21 and the right helix 22 satisfy the following conditions:

[0056] θ1=θ2;

[0057]

[0058] It should be noted that the distribution of the left helix 21 and the right helix 22 on the roller surface in the present application are partial curves of the cylindrical helix. Therefore, the radius R of the roller surface where the cylindrical helix is ​​located, the lead P of the cylindrical helix, the pitch b of the cylindrical helix, the period T of the cylindrical helix, the number of heads n1 of the right helix 22, the number of heads n2 of the left helix 21 and the amplitude A are not marked in the figure.

[0059] like Figure 1 and Figure 4 As shown, after determining the number of heads n, pitch b, lead P, helical angle β and other parameters of the left helix 21 and the right helix 22 by the above cylindrical helix formula, the operator can select a cross-sectional shape of a unit protrusion 23 and use one of the left-handed helixes as a guide line to sweep around the roller surface, repeating the sweep of n2 left-handed helixes 21 for multiple times, and then use the selected cross-sectional shape of the unit protrusion 23 to use one of the right-handed helixes as a guide line to sweep around the roller surface for multiple times to complete the sweep of n1 right-handed helixes 22. After sweeping, a corrugated structure is formed, and a plurality of unit protrusions 23 are formed on the surface of the corrugated structure at the intersection of the left spiral line 21 and the right spiral line 22. The plurality of unit protrusions 23 are arranged in an array along the left spiral line 21 and the right spiral line 22 in sequence. During the rolling process, the unit protrusions 23 generate an oblique cross flow with the surface of the metal laminate, which promotes the lateral and oblique extension of the metal, destroys the specific rolling grain orientation on the metal laminate, weakens the rolling texture, reduces the anisotropy of mechanical properties, and improves the bonding strength of the rolled metal laminate.

[0060] like Figure 5 and Figure 6As shown, specifically, in this embodiment, the cross-sectional profile of multiple unit protrusions 23 along the direction perpendicular to the left spiral line 21 includes a sawtooth shape or a wavy shape; and / or, the cross-sectional profile of multiple unit protrusions 23 along the direction perpendicular to the right spiral line 22 includes a sawtooth shape or a wavy shape. A closed figure is formed between the cross-sectional contour of the unit protrusion 23 in the direction perpendicular to the left spiral line 21 and the roller surface. A closed figure can also be formed between the cross-sectional contour of the unit protrusion 23 in the direction perpendicular to the right spiral line 22 and the roller surface. The closed figure is the cross-sectional shape of the unit protrusion 23. When the cross-sectional contour is a sawtooth shape, the closed figure is a triangle; when the cross-sectional contour is a wave shape, the closed figure can be a hemispherical, ellipsoidal or other shape with a smooth surface contour, which is not specifically limited here. The wavy contour trajectory can be formed by splicing a sine curve, a cosine curve or multiple parabolas, as long as a relatively smooth transition is ensured at the corner gap of the corrugated structure surface, the concentrated stress generated at the corner gap of the corrugated structure surface during rolling is reduced, and the risk of warping and edge cracking of the rolled metal laminate is avoided.

[0061] like Figure 6 As shown, specifically, in this embodiment, the angle formed by the two sides of each unit tooth shape on the cross-sectional profile is greater than or equal to 60°. Among them, the angle α formed by the two sides of each unit tooth shape on the profile can be 60°, 80°, 95°, 130°, etc., and the angle α formed by the two sides of each unit tooth shape is not specifically limited here, as long as the corner gap of the corrugated structure surface is ensured to have a relatively smooth transition, the concentrated stress generated at the corner gap of the corrugated structure surface during rolling is reduced, and the risk of warping and edge cracking of the rolled metal laminate is avoided.

[0062] Specifically, in this embodiment, the distance between the peak and valley of the cross-sectional profile in the radial direction of the roller sleeve 2 is 3 mm to 5 mm. Among them, the distance h between the peak and valley of the profile of the symmetrical cross section in the radial direction of the roller sleeve 2 can be 3 mm, 3.5 mm, 4 mm, 5 mm, etc., and the distance h between the peak and valley of the profile of the symmetrical cross section in the radial direction of the roller sleeve 2 is not specifically limited here, as long as the transition of the corrugated structure surface at the peak and valley is relatively smooth, the concentrated stress generated on the surface of the corrugated structure during rolling is avoided, and the risk of warping and edge cracking of the rolled metal laminate is reduced.

[0063] like Figure 3-Figure 6As shown, for example, when the average diameter of the roller sleeve 2 is 150 mm, that is, the average value of the distance a1 between the peak point of the corrugated structure of the roller sleeve 2 and the axis center of the roller sleeve 2 and the distance a2 between the valley point of the corrugated structure of the roller sleeve 2 and the axis center of the roller sleeve 2 is added, the average diameter of the roller sleeve 2 is taken; the inner hole diameter L1 of the roller sleeve 2 is 100 mm, the width L2 of the roller sleeve 2 is 150 mm, the number of heads n1 of the left spiral line 21 and the number of heads n2 of the right spiral line 22 are both 12, the lead P is 150 mm, the angle α formed by the two sides of each unit tooth shape is 120°, and the height h is a triangle of 4 mm, the operator uses one of the left-handed spirals as a guide line to surround the selected triangle according to the symmetrical cross-section of the triangle. The outer surface of the cylinder formed by the average diameter of the roller sleeve 2 is swept. After repeatedly completing the sweep of n2 left-handed spiral lines 21, the symmetrical cross-section of the selected triangle is used to sweep around the outer surface of the cylinder formed by the average diameter of the roller sleeve 2 with one of the right-handed spirals as a guide line. After repeatedly completing the sweep of n1 right-handed spiral lines 22, a corrugated structure with multiple unit protrusions 23 is formed. During the rolling process, the corrugated structure can limit the plastic deformation of the metal laminate at each unit protrusion 23 on the roller sleeve 2 to a specific area, so as to realize the discreteness of residual stress and avoid serious edge cracks at the edge of the metal laminate due to large tensile stress along the rolling direction.

[0064] like Figure 2 As shown, specifically, in this embodiment, the core shaft 1 and the roller sleeve 2 are key-connected, and the fastener 3 includes: a key block 31, two retaining rings 32 and a screw 33. The roller sleeve 2 and the core shaft 1 are key-connected via the key block 31, and the two retaining rings 32 are both sleeved on the core shaft 1, and the two retaining rings 32 are respectively located at both ends of the roller sleeve 2, each retaining ring 32 has a plurality of mounting holes 331, and the screws 33 correspond to the mounting holes 331 one by one, and the screws 33 pass through the mounting holes 331 and are fixedly connected to the core shaft 1. After the operator embeds the key block 31 into the core shaft 1, the protruding part of the key block 31 relative to the outer surface of the core shaft 1 is clearance-matched with the guide groove 24 set inside the roller sleeve 2, so that the roller sleeve 2 and the core shaft 1 are key-connected through the key block 31, and the circumferential fixation of the roller sleeve 2 is completed. At this time, the two retaining rings 32 are respectively inserted into the core shaft 1 and placed at both ends of the roller sleeve 2. The retaining rings 32 are fastened to the core shaft 1 through the mounting holes 331 by multiple screws 33, and the axial fixation of the roller sleeve 2 is completed, which facilitates the installation and disassembly of the roller sleeve 2. When the corrugated structure on the surface of the roller sleeve 2 is severely worn, the roller sleeve 2 can be replaced by removing the retaining rings 32, thereby improving the flexibility of the corrugated roller.

[0065] like Figure 1 and Figure 3As shown, specifically, in this embodiment, the distance from the surface where the valley point of the corrugated structure is located to the axis of the mandrel 1 is greater than the outer diameter of the retaining ring 32. When the inner hole diameter L1 of the roller sleeve 2 is 100 mm and the average diameter of the roller sleeve 2 is 150 mm, if the distance a2 from the surface where the valley point of the corrugated structure is located to the axis of the mandrel 1 is 73 mm, then the outer diameter L3 of the retaining ring 32 satisfies L1<L3<2a2, that is, the outer diameter L3 of the retaining ring 32 can be 120 mm, 130 mm, 145 mm, etc., and the outer diameter L3 of the retaining ring 32 is not specifically limited here, as long as the retaining ring 32 can realize the positioning of the roller sleeve 2 and does not affect the rolling work of the corrugated structure of the roller sleeve 2, so as to avoid the retaining ring 32 from contacting the plate of the metal laminate during the rolling process.

[0066] In other embodiments, the core shaft 1 and the roller sleeve 2 are an integrally formed structure, which reduces the installation and disassembly procedures of the corrugated roller and facilitates production and manufacturing.

[0067] At the same time, the present invention also provides a rolling system, including two driving devices, a flat roller group and a corrugated roller group, the flat roller group is composed of two flat rollers arranged at intervals, and the corrugated roller group is composed of two corrugated rollers arranged at intervals as any of the above items, the two driving devices are used to drive the rotation of the flat roller group and the rotation of the corrugated roller group respectively, the first plate and the second plate are stacked to form a composite slab, and the corrugated roller group and the flat roller group are used to apply rolling force to the composite slab to complete rolling.

[0068] During operation, the operator first starts one of the driving devices so that the driving end of the driving device drives the corrugated roller group to start working. At this time, the composite slab formed by stacking the first plate and the second plate is placed between two spaced corrugated rollers for the first rolling. After the rolling is completed, the first plate and the second plate are embedded in each other due to the influence of the corrugated structure on the surface of the corrugated roller. Then start another driving device so that the driving end of the driving device drives the flat roller group to start working. At this time, the composite slab formed by the first rolling is placed between two spaced flat rollers for the second rolling. After the rolling is completed, the gap at the internal fitting of the plate reflects the corrugated structure of the corrugated roller surface. Compared with the traditional rolling system that changes the rolling direction by flat roller rolling, the rolling system in the present application uses corrugated rollers to limit the plastic deformation of the first plate and the second plate to a specific area through each unit protrusion 23 on the surface of the corrugated roller during the rolling process, thereby avoiding serious edge cracks at the edge of the plate caused by strong tensile stress along the rolling direction, thereby improving the bonding strength of the composite slab.

[0069] Specifically, in this embodiment, the ratio between the thickness of the composite slab and the amplitude of the left spiral line 21 on the roller sleeve 2 and the ratio between the thickness of the composite slab and the amplitude of the right spiral line 22 on the roller sleeve 2 are the same, and the ratios are both 2 to 5. Since the left spiral line 21 and the right spiral line 22 are both cylindrical spiral lines, combined with the above cylindrical spiral line formula, it can be known that the coordinates of any point on the left spiral line 21 can be expressed as:

[0070] Therefore, the amplitude formula of the cylindrical spiral line is A=R. Similarly, the amplitude of the right spiral line 22 can be obtained. That is, under the premise of ensuring that the corrugated structure on the corrugated roller can be completely reflected on the surface of the composite slab, the ratio between the thickness of the composite slab and the amplitude A of the left spiral line 21 on the roller sleeve 2 can be 2, 3.5, 4, 5, etc. There is no specific limitation on the ratio between the thickness of the composite slab and the amplitude A of the left spiral line 21 on the roller sleeve 2, as long as the composite slab after rolling by the corrugated roller meets the bonding strength requirements.

[0071] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0072] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A corrugated roller, characterized in that: include: Mandrel; A roller sleeve is sleeved on the mandrel, the roller surface of the roller sleeve has a corrugated structure, the corrugated structure has a plurality of left spiral lines and a plurality of right spiral lines that are interlaced and distributed, and the interlaced area of ​​each two adjacent left spiral lines and each two adjacent right spiral lines has a unit protrusion, and a plurality of the unit protrusions are arranged in an array on the roller surface; A fastener is used to connect and fix the core shaft and the roller sleeve.

2. The corrugation roller according to claim 1, characterized in that The right helix and the left helix are both cylindrical helices, and the parameter equation of the right helix is: Wherein, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n1 is the number of heads of the right helix, β1 is the helix angle between the right helix and the axis of the roller sleeve, The parametric equation of the left helix is: Wherein, R is the radius of the roller surface where the cylindrical helix is ​​located, P is the lead of the cylindrical helix or the width of the roller sleeve along its axial direction, b is the pitch of the cylindrical helix, T is the period of the cylindrical helix, n2 is the number of heads of the left helix, β2 is the helix angle between the left helix and the axis of the roller sleeve, And the left helix and the right helix satisfy the following conditions: θ1=θ2; 3. The corrugation roller according to claim 1, characterized in that: The cross-sectional profiles of the plurality of unit protrusions along the direction perpendicular to the left spiral line include sawtooth or wave shapes; And / or, the cross-sectional profiles of the plurality of unit protrusions along a direction perpendicular to the right spiral line include sawtooth shapes or wavy shapes.

4. The corrugation roller according to claim 3, characterized in that The angle formed by two sides of each unit tooth shape on the cross-sectional profile is greater than or equal to 60°.

5. The corrugation roller according to claim 3, characterized in that: The distance between the peak point and the valley point of the cross-sectional profile in the radial direction of the roller sleeve is 3 mm to 5 mm.

6. The corrugation roller according to claim 1, characterized in that The mandrel is key-connected to the roller sleeve, and the fastener comprises: A key block, wherein the roller sleeve and the mandrel are connected via the key block; Two retaining rings are both sleeved on the core shaft, and the two retaining rings are respectively located at two ends of the roller sleeve, and each retaining ring has a plurality of mounting holes; The screws correspond to the mounting holes one by one, and the screws pass through the mounting holes to be fixedly connected to the core shaft.

7. The corrugation roller according to claim 6, characterized in that The distance between the surface where the valley point of the corrugated structure is located and the axis of the core shaft is greater than the outer diameter of the retaining ring.

8. The corrugation roller according to claim 1, characterized in that The core shaft and the roller sleeve are an integrally formed structure.

9. A rolling system, characterized in that: It comprises two driving devices, a flat roller group and a corrugated roller group, wherein the flat roller group is composed of two flat rollers arranged at intervals, and the corrugated roller group is composed of two corrugated rollers as described in any one of claims 1 to 8 arranged at intervals, and the two driving devices are respectively used to drive the rotation of the flat roller group and the rotation of the corrugated roller group, a first plate and a second plate are stacked to form a composite plate, and the corrugated roller group and the flat roller group are used to apply rolling force to the composite plate to complete rolling.

10. The rolling system according to claim 9, characterized in that The ratio between the thickness of the composite slab and the amplitude of the left spiral line on the roller sleeve and the ratio between the thickness of the composite slab and the amplitude of the right spiral line on the roller sleeve are the same, and the ratios are both 2-5.

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