Aluminum plate strip casting roller

Abstract

The aluminum plate strip casting roller sequentially comprises a bonding layer, a transition layer and a working layer from inside to outside, the bonding layer is made of high-strength alloy steel, the transition layer is made of copper-nickel alloy, and the working layer is made of copper-based alloy; the outer wall of the combination layer is peripherally provided with a plurality of adjacent protrusions which are equal in interval included angle and extend along the axial direction, the width of one end, tightly attached to the transition layer, of each protrusion is larger than that of the other end of each protrusion, the protrusions and the combination layer are integrated, and a gap channel extending along the axial direction is reserved between every two adjacent protrusions. At least one first cutting groove extending in the anticlockwise direction in the circumferential direction is formed in one side of the protruding part, at least one second cutting groove extending in the clockwise direction in the circumferential direction is formed in the other side of the protruding part, and the two ends of the second cutting groove and the two ends of the first cutting groove extend to be connected with the end face of the bonding layer. The casting roller has the advantages of being stable in structure, long in service life, complete in overall function and high in practicability.

Description

Technical Field

[0001] This invention relates to the field of casting and rolling equipment technology, and more specifically, to an aluminum sheet and strip casting roll. Background Technology

[0002] In the aluminum sheet and strip casting and rolling process, the casting rolls must withstand the thermal shock of high-temperature molten aluminum, rolling pressure, and friction. Their ability to control thermal deformation directly affects product accuracy and efficiency. Existing casting rolls are mostly made of a single material or have a simple bimetallic structure, with the bonding layer and transition layer smoothly bonded together, failing to address the issue of differentiated thermal deformation between layers. During high-speed casting and rolling, mismatches in the coefficients of thermal expansion and contraction between layers can easily lead to stress concentration, resulting in roll sleeve peeling, roll surface deformation, and exceeding aluminum sheet thickness tolerances. Although there are solutions to optimize the cooling system, they cannot accurately compensate for interfacial thermal deformation. This problem is more pronounced in the casting and rolling of high-strength aluminum alloys, resulting in low product yield, short roll sleeve life, and constraints on process economy, leading to overall poor performance. Therefore, this invention proposes an aluminum sheet and strip casting roll. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an aluminum strip casting roll, which has the characteristics of stable structure and long service life.

[0004] To solve the above-mentioned technical problems, the present invention achieves its objective as follows: The present invention relates to an aluminum strip casting roll, comprising, from the inside out, a bonding layer, a transition layer, and a working layer. The bonding layer is made of high-strength alloy steel, the transition layer is made of copper-nickel alloy, and the working layer is made of copper-based alloy. The outer wall of the bonding layer is circumferentially distributed with several adjacent protrusions of equal included angle and extending axially. The width of one end of each protrusion, which is in close contact with the transition layer, is greater than the width of the other end. The protrusions are integral with the bonding layer, and an axially extending gap channel is left between adjacent protrusions. One side of each protrusion has at least one counter-clockwise circumferential groove (slot one), and the other side has at least one clockwise circumferential groove (slot two). Both ends of groove two and groove one extend to connect with the end face of the bonding layer.

[0005] The present invention is further configured such that: the first cutting groove is arranged on the outer side; the second cutting groove is arranged on the inner side.

[0006] The present invention is further configured such that the cross-section of the gap channel is teardrop-shaped.

[0007] The present invention is further configured such that: the thickness of the bonding layer is 10-15 mm; the thickness of the transition layer is 3-5 mm; and the thickness of the working layer is 5-8 mm.

[0008] The present invention is further configured such that the working layer is a nano-WC-reinforced copper-based alloy material.

[0009] In summary, the present invention has the following beneficial effects: 1. The design of the combined layer protrusion and bidirectional groove absorbs the thermal expansion between layers through elastic deformation and spatial buffering, effectively disperses the interface stress, avoids the delamination or cracking of the roller sleeve, and improves the bonding stability of the roller sleeve and the forming accuracy of the roller surface.

[0010] 2. The teardrop-shaped gap channel increases the contact area between the bonding layer and the transition layer, improving heat conduction efficiency. It can also assist in cooling, reduce heat accumulation at the interface, and further optimize the temperature uniformity of the working layer when combined with gradient materials.

[0011] 3. The integrated molding design of the protrusion and the bonding layer, as well as the stress release effect of the groove, enhances the fatigue resistance of the bonding layer, adapts to high-speed casting and rolling conditions, extends the service life of the roll sleeve, and significantly improves the product qualification rate of high-strength aluminum alloy casting and rolling. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0013] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are merely for further illustrating the features and advantages of the present invention, and not for limiting the scope of the patent claims of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0015] Example 1 See Figures 1 to 3As shown, the aluminum strip casting roll involved in this embodiment includes, from the inside out, a bonding layer 100, a transition layer 200, and a working layer 300. The bonding layer 100 is made of high-strength alloy steel, the transition layer 200 is made of copper-nickel alloy, and the working layer 300 is made of nano-WC reinforced copper-based alloy. The outer wall of the bonding layer 100 is provided with a plurality of adjacent protrusions 101 with equal included angles and extending axially. The width of one end of the protrusion 101 that is in close contact with the transition layer is greater than that of the other end. Width, the protrusion 101 is integral with the bonding layer 100, and a gap channel 102 extending axially is left between adjacent protrusions 101. The cross-section of the gap channel 102 is teardrop-shaped. One side of the protrusion 101 is provided with a groove 103 extending counterclockwise in the circumferential direction and arranged outward, and the other side is provided with a groove 104 extending clockwise in the circumferential direction and arranged inward. Both ends of the groove 104 and the groove 103 extend to connect with the end face of the bonding layer 100.

[0016] Furthermore, the thickness of the bonding layer 100 is 10-15 mm; the thickness of the transition layer 200 is 3-5 mm; and the thickness of the working layer 300 is 5-8 mm.

[0017] Bonding layer processing: High-strength alloy steel is selected and forged into a cylindrical structure by CNC lathe. The outer wall is machined with circumferentially evenly distributed protrusions. The width of one end of the protrusion is larger than that of the other end, which is close to the transition layer. At the same time, a groove extending counterclockwise along the circumference is milled on one side of the protrusion, and a groove extending clockwise along the circumference is milled on the other side. The groove is arranged inward and the groove is arranged outward. Both ends of the two grooves extend to the end face of the bonding layer, forming a teardrop-shaped gap channel between adjacent protrusions.

[0018] Gradient roller sleeve composite: The processed bonding layer is heated, and a copper-nickel alloy transition layer is formed on its outer wall using centrifugal casting process; then the composite billet is moved into a vacuum melting furnace, and nano-WC reinforced copper-based alloy is cast on the outer wall of the transition layer. The cooling rate is controlled to form a working layer, ensuring that the interfaces of each layer are tightly bonded.

[0019] Overall assembly: After heating the gradient roll sleeve, it is fitted into the roll core with a pre-set cooling water channel. Natural cooling achieves an interference fit. Finally, the surface of the working layer is polished to complete the preparation of the casting roll. In this embodiment, the coordinated design of the protrusions and grooves can effectively absorb thermal deformation and adapt to high-speed casting and rolling conditions.

[0020] The aluminum strip casting roll involved in this invention, through the design of the protruding part of the bonding layer and the bidirectional groove, absorbs the interlayer thermal expansion through elastic deformation and spatial buffering, effectively disperses the interface stress, avoids roll sleeve delamination or cracking, and improves the bonding stability and roll surface forming accuracy. The teardrop-shaped gap channel increases the contact area between the bonding layer and the transition layer, improves the heat conduction efficiency, and can also assist in cooling, reduce the accumulation of heat at the interface, and further optimize the temperature uniformity of the working layer with gradient materials. Furthermore, the integrated molding design of the protrusion and the bonding layer and the stress release effect of the groove enhance the fatigue resistance of the bonding layer, adapt to high-speed casting and rolling conditions, extend the service life of the roll sleeve, and significantly improve the product qualification rate of high-strength aluminum alloy casting and rolling. The overall function is perfect and highly practical.

[0021] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0022] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A type of aluminum sheet and strip casting roll, characterized in that, From the inside out, it includes a bonding layer, a transition layer, and a working layer. The bonding layer is made of high-strength alloy steel, the transition layer is made of copper-nickel alloy, and the working layer is made of copper-based alloy. The outer wall of the bonding layer has several adjacent protrusions with equal included angles and extending axially. The width of one end of the protrusion that is close to the transition layer is greater than the width of the other end. The protrusions are integral with the bonding layer. There is a gap channel extending axially between adjacent protrusions. One side of the protrusion has at least one groove extending counterclockwise in the circumferential direction, and the other side has at least one groove extending clockwise in the circumferential direction. Both ends of the grooves extend to connect with the end face of the bonding layer.

2. The aluminum strip casting roll according to claim 1, characterized in that, The first cutting groove is arranged on the outer side; the second cutting groove is arranged on the inner side.

3. The aluminum strip casting roll according to claim 1 or 2, characterized in that, The cross-section of the gap channel is teardrop-shaped.

4. The aluminum strip casting roll according to claim 3, characterized in that, The thickness of the bonding layer is 10-15 mm; the thickness of the transition layer is 3-5 mm; and the thickness of the working layer is 5-8 mm.

5. The aluminum strip casting roll according to claim 1, characterized in that, The working layer is a nano-WC reinforced copper-based alloy material.

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