A device and method for laser-assisted roll bonding of dissimilar metals based on biomimetic interlocking

Abstract

The application discloses a laser-assisted casting-rolling dissimilar metal device and method based on biomimetic interlocking, relates to the metal composite plate strip rolling technical field, and the laser-assisted casting-rolling dissimilar metal device comprises an uncoiler, the bottom end of the uncoiler is provided with a metal plate strip material matched with the uncoiler, the bottom end of the metal plate strip material is provided with a plurality of conveying components, steel wire brush rollers are arranged between every two of the plurality of conveying components, and the steel wire brush rollers are all arranged at the top end of the metal plate strip material; a embossing roller is arranged between one of the conveying components and one of the steel wire brush rollers, and a direct laser interference mechanism is arranged at the top of the metal plate strip material.The laser is combined with the embossing roller to form a multi-scale biomimetic structure on the surface of the metal plate strip material, the biomimetic interlocking is realized under the action of the casting-rolling pressure, the mechanical occlusion and the metallurgical combination are simultaneously exerted, and the limitation of single metallurgical combination of an interface in a traditional preparation method is broken through.

Description

Technical Field

[0001] This invention relates to the field of metal composite strip rolling technology, and more specifically, to a device and method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking. Background Technology

[0002] Composite materials combine the advantages of their constituent components, overcoming the shortcomings of single-material performance, and are widely used in aerospace, new energy, and metallurgical equipment. Due to their unique performance advantages and broad application prospects, composite materials have become a key research area for many countries in recent years. Dissimilar metal composite sheets and strips are typical examples of metal composite materials, primarily achieved through deformation or diffusion to metallurgically bond two or more metal sheets and strips. However, for highly dissimilar metals, the significant differences in their physicochemical properties result in relatively poor interfacial bonding, making it difficult to meet the requirements of complex working conditions. Currently, layered metal composite sheets and strips are mainly prepared using rolling or cast-rolling composite processes. Rolling requires a large amount of deformation, making it difficult to bond difficult-to-deform and highly dissimilar metal sheets and strips. Cast-rolling composites involve smaller deformation, but the bonding interface is a single metallurgical bond, which has limitations for dissimilar metals that easily form brittle intermetallic compounds. Therefore, how to effectively bond difficult-to-deform and highly dissimilar metal sheets and strips is one of the challenges facing the field of layered metal composite materials both domestically and internationally.

[0003] For example, Chinese patent CN110935727B discloses a method for superplastic rolling of dissimilar metal composite materials using laser heating. This method heats the metal with high energy density laser light, bringing the entire metal into a high-temperature superplastic state, thus enabling significant plastic deformation. This method is suitable for metals that are difficult to deform. However, due to the vast differences in the physicochemical properties and constitutive behaviors of dissimilar metals, deformation inconsistencies are prone to occur, making it difficult to apply to the preparation of dissimilar metal composite plates and strips with significant differences.

[0004] Chinese patent CN112872037A discloses a laser rolling composite manufacturing device and manufacturing method for three-layer composite metal strips. It combines laser technology and rolling technology, and prepares dissimilar metal composite strips with a small amount of deformation by simultaneously heating both sides of the metal substrate with laser. However, the interface is a single metallurgical bond, and the bonding effect needs to be improved.

[0005] Chinese patent CN112894135A discloses a laser rolling composite additive manufacturing device and manufacturing method. It uses laser melting to simultaneously melt the interface between the metal foil strip and the substrate, and uses rollers to roll it. The metal foil strip is stacked layer by layer by alternating melting and rolling to complete the additive manufacturing. This method also combines rolling and laser, but the interface is a single metallurgical bond, and it is only suitable for the field of additive manufacturing, and is difficult to adapt to the composite of dissimilar metal sheets and strips.

[0006] In summary, dissimilar metal composite strips have broad application prospects, but the preparation of dissimilar metal composite strips with large differences and difficult bonding is relatively difficult. In order to improve the interfacial bonding effect, laser and rolling can be combined, but there are still certain limitations for dissimilar metals with large differences and difficult bonding.

[0007] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0008] To address the problems in related technologies, this invention proposes a device and method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking, in order to overcome the aforementioned technical problems existing in the prior art.

[0009] Therefore, the specific technical solution adopted by the present invention is as follows: According to one aspect of the present invention, a device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking is provided. The device includes an uncoiler, with a metal strip at the bottom of the uncoiler and a plurality of conveying components at the bottom of the metal strip. Wire brush rollers are arranged between each pair of conveying components, and all wire brush rollers are located at the top of the metal strip. An embossing roll mill is arranged between one of the conveying components and one of the wire brush rollers. A direct laser interference mechanism is arranged at the top of the metal strip. A plurality of guiding mechanisms are arranged on one side of one of the conveying components. A gas protective hood, a casting mechanism, and a casting and rolling mechanism are arranged sequentially between the guiding mechanisms. A vibration mechanism is arranged at the bottom of the casting mechanism. Visual sensors are arranged at both ends of the top of the metal strip.

[0010] Furthermore, in order to form millimeter-scale sinusoidal ripples on the upper surface of the metal sheet and strip under the action of rolling pressure, in preparation for subsequent interface interlocking, the embossing roll mill includes an upper roll set on one side of the top of the metal sheet and strip, and a lower roll that cooperates with it at the bottom of the upper roll. Several sinusoidal ripples are evenly opened on the outer circumference of the upper roll. The length of the sinusoidal ripples is 5~15mm, the amplitude is controlled at 5~10mm, the protrusion height is 1~3mm, the cross-section is a semicircle with a diameter of 2~4mm, and the spacing between adjacent sinusoidal ripples is 3~8mm.

[0011] Furthermore, in order to allow nitrogen and argon to be introduced through the air inlet and to allow the protective gas to be sprayed quickly and evenly onto the surface of the metal strip through the gas nozzle, so as to prevent oxidation caused by the metal heating of the metal strip near the casting mechanism, thereby slowing down the overflow of the protective gas and helping to save protective gas, the gas protective cover includes a shell set on one side of one of the guide mechanisms. The outer wall of the shell has an air inlet, and the inner side of the shell has a gas nozzle that cooperates with the air inlet.

[0012] Furthermore, in order to install a retractable sealing plate on the distributor, which can be quickly opened and closed through the arc track groove to achieve sealed casting, and the sealing plate is provided with air inlet and exhaust holes, which can reduce oxidation during the casting process, and the air pressure can be changed by adjusting the airflow, thereby slightly adjusting the casting speed of the liquid metal. At the same time, the molten liquid metal first enters the tundish shell and then is evenly distributed laterally on the metal strip through the distributor. The casting mechanism includes a tundish shell set on one side of the top of the outer shell, a casting gate set at the bottom of the tundish shell, a distributor set at the bottom of the casting gate, and sealing plates symmetrically arranged on both sides of the casting gate and at the top of the distributor. One sealing plate has an air inlet hole at the top and the other sealing plate has an exhaust hole at the top. The bottom of the distributor is provided with a side plate, and the bottom sides of the sealing plate are symmetrically provided with arc track grooves that cooperate with the top of the distributor.

[0013] Furthermore, in order to drive the driving gear to rotate via the motor, which in turn drives the driven gear to rotate, thereby causing the side pendulum and intermediate hammer to alternately strike the lower surface of the metal strip, generating vibration, and simultaneously, under the pressure of the casting and rolling mechanism, the dissimilar liquid metal is fully immersed into the biomimetic microstructure on the surface of the metal strip, achieving biomimetic interlocking and metallurgical bonding between the substrate metal and the dissimilar liquid metal, the vibration mechanism includes a vibration shell located at the bottom of the outer shell. The driving gear is located on one side inside the vibration shell, with its center connected to the output end of the motor, and the motor is located on the outer wall of the vibration shell. A driven gear is located on the outer circumference of the driving gear, meshing with it. A cylindrical protrusion is eccentrically located on one side of the driven gear, and an intermediate hammer is located outside the cylindrical protrusion. Several bearings are symmetrically arranged on both sides of the intermediate hammer, and all bearings are located on the inner wall of the vibration shell. Side pendulums are symmetrically arranged on both sides of the top of the intermediate hammer. One end of each set of side pendulums is connected to the intermediate hammer via a first bolt, and the other end of each set of side pendulums is connected to the inner wall of the vibration shell via a second bolt.

[0014] According to another aspect of the present invention, a method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking is also provided, the method comprising the following steps: S1. After the metal sheet and strip are unwound and leveled by an uncoiler, the metal sheet and strip are moved forward by several conveying components in coordination. S2. Use a vision sensor to monitor the positional offset of the metal strip during its movement, and correct the position of the metal strip based on the positional offset. S3. Use an embossing roll mill to roll the metal sheet and strip to form a sinusoidal wave pattern on the upper surface of the metal sheet and strip, and use a vision sensor to detect whether there are any defects in the sinusoidal wave pattern. S4. After rolling the metal sheet and strip, the surface of the metal sheet and strip is cleaned by a wire brush roller to remove impurities from the surface of the metal sheet and strip. S5. Irradiate the upper surface of the metal sheet / strip using a direct laser interference mechanism to form a micron-scale periodic grid on the upper surface of the metal sheet / strip, and further remove impurities from the surface of the metal sheet / strip using a wire brush roller. S6. After the metal strip enters the gas protection hood, vibration mechanism and casting and rolling mechanism in sequence through the guiding mechanism, the generated dissimilar liquid metal is evenly distributed in the space enclosed by the upper side of the metal strip, the side sealing plate and the casting and rolling roll. S7. The upper surface of the metal strip comes into contact with the molten dissimilar liquid metal, and in conjunction with the vibration mechanism and casting rolls, the multi-scale microstructure of the metal strip is fully combined with the dissimilar liquid metal to achieve biomimetic interlocking and metallurgical bonding.

[0015] Furthermore, the step of using a visual sensor to monitor the positional offset of the metal strip during movement and correcting the movement position of the metal strip based on the positional offset includes the following steps: S21. Use a visual sensor to capture a continuous sequence of images of the metal sheet and strip during its movement, and extract the edge contour features of the metal sheet and strip from the continuous sequence of images. S22. Use a distance tracking algorithm to track the edge contour features of the metal sheet and strip, and generate a real-time tracking trajectory of the metal sheet and strip. S23. During the tracking of the metal strip trajectory, the position offset of the metal strip during the movement is calculated every time the metal strip passes through a preset distance point, and a position correction strategy is formulated based on the position offset. S24. Establish the collaborative relationship between the conveying components and the guiding mechanism, and use the position correction strategy to generate the optimal adjustment parameters for each conveying component and the guiding mechanism to correct the offset position of the metal strip.

[0016] Furthermore, the process of using a distance tracking algorithm to track the edge contour features of the metal sheet / strip and generating a real-time tracking trajectory for the metal sheet / strip includes the following steps: S221. Using the edge contour features of the metal sheet and strip as the tracking target, extract the grayscale features of the tracking target from the continuous sequence images of the metal sheet and strip. S222. Obtain the distribution characteristics between the tracked target and the candidate target, and calculate the center distance between the tracked target and the candidate target based on the distribution characteristics; S223. Determine the tracking center point based on the center distance between the tracking target and the candidate target, and use the tracking target position in the previous frame image as the search window position of the current frame; S224. Use an iterative algorithm to traverse within the search window to find the local optimal tracking target position, so that the tracking center point moves from the starting point to the local optimal tracking target position, thereby generating the tracking trajectory of the metal strip. S225. While tracking the center point, continuously acquire the search window position of the current frame, and simultaneously perform non-linear updates on the tracking trajectory of the metal strip.

[0017] The beneficial effects of this invention are as follows: 1. This invention combines laser processing with embossing roller rolling to create a multi-scale biomimetic structure on the surface of metal sheet and strip. Under the pressure of the casting and rolling rollers, a biomimetic interlocking is achieved, simultaneously playing the roles of mechanical interlocking and metallurgical bonding. This overcomes the limitations of traditional preparation methods that rely on a single metallurgical bonding interface. Furthermore, to meet the bonding performance requirements of different metal sheet and strip materials, customized multi-scale biomimetic microstructures can be obtained by adjusting the texture of the embossing roller and the laser parameters, thereby obtaining bonding interfaces of different morphologies, demonstrating excellent flexibility.

[0018] 2. This invention does not require a large amount of rolling deformation, reducing the dependence of interfacial bonding on deformation. It is suitable for the preparation of dissimilar metal sheets and strips with large differences and difficult bonding. It has significant advantages for dissimilar metal sheets and strips with interfacial intermetallic compounds. Furthermore, the synergistic effect of sealed casting and protective gas effectively inhibits the oxidation of liquid metal during the casting and rolling process, which helps to reduce the splashing of liquid metal. The sealing cover in the casting mechanism is equipped with air inlet and exhaust holes. The casting speed of liquid metal can be slightly adjusted by adjusting the airflow.

[0019] 3. This invention generates stress waves through a vibration mechanism, causing the interface metal to vibrate. This promotes the full entry of dissimilar liquid metals into the multi-scale biomimetic microstructures on the upper surface of the metal sheet and strip, ensuring the formation of biomimetic interlocking during the casting and rolling process. Furthermore, the interface vibration increases the solidification nucleation rate of dissimilar liquid metals near the interface, which is beneficial for refining the interface structure.

[0020] 4. This invention can monitor the positional deviation of the metal strip in real time, thereby accurately controlling the deviation error of the metal strip during the movement process, correcting the moving position of the metal strip in real time, ensuring that the metal strip moves along the preset route, and thus achieving stable conveying of the metal strip. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper roll structure in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the sinusoidal wave pattern in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the sinusoidal wave pattern from another angle in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the gas protection shield in a device for laser-assisted casting and rolling dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 6 This is a partial cross-sectional view of the gas shield in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the casting mechanism in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 8 This is a partial cross-sectional view of the casting mechanism in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 9 This is a schematic diagram of the vibration mechanism in a device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 10 This is a partial cross-sectional view of the vibration mechanism in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 11 This is a partial cross-sectional view from another angle of the vibration mechanism in a laser-assisted casting and rolling device for dissimilar metals based on biomimetic interlocking, according to an embodiment of the present invention. Figure 12 yes Figure 11 A magnified view of a portion of Figure A in the middle; Figure 13 This is a flowchart of a method for laser-assisted casting and rolling dissimilar metals based on biomimetic interlocking according to an embodiment of the present invention.

[0023] In the picture: 1. Uncoiling machine; 2. Metal sheet and strip; 3. Conveying components; 4. Wire brush roller; 5. Embossing mill; 501. Upper roll; 5011. Sine wave pattern; 6. Direct laser interference mechanism; 7. Guiding mechanism; 8. Gas protection hood; 801. Outer shell; 802. Air inlet; 803. Gas nozzle; 9. Casting mechanism; 901. Tundish shell; 902. Casting nozzle; 903. Distributor; 904. Circular arc rail 905. Sealing plate; 906. Air inlet; 907. Exhaust port; 10. Casting and rolling mechanism; 11. Vibration mechanism; 1101. Vibration housing; 1102. Drive gear; 1103. Motor; 1104. Cylindrical protrusion; 1105. Intermediate hammer; 1106. Bearing; 1107. Side pendulum; 1108. First bolt; 1109. Second bolt; 11010. Driven gear; 12. Vision sensor. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] According to an embodiment of the present invention, a device and method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking are provided.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-12 As shown, according to an embodiment of the present invention, a laser-assisted casting and rolling device based on biomimetic interlocking for dissimilar metals includes an uncoiler 1. A metal strip 2 is disposed at the bottom of the uncoiler 1 and cooperates with it. A plurality of conveying components 3 are disposed at the bottom of the metal strip 2. Wire brush rollers 4 are disposed between each pair of conveying components 3, and all wire brush rollers 4 are disposed at the top of the metal strip 2. An embossing roller mill 5 is disposed between one of the conveying components 3 and one of the wire brush rollers 4. A direct laser interference mechanism 6 is disposed at the top of the metal strip 2. A plurality of guiding mechanisms 7 are disposed on one side of one of the conveying components 3. A gas protective cover 8, a casting mechanism 9, and a casting and rolling mechanism 10 are sequentially disposed between the guiding mechanisms 7. A vibration mechanism 11 is disposed at the bottom of the casting mechanism 9. Visual sensors 12 are disposed at both ends of the top of the metal strip 2.

[0027] Specifically, the uncoiling machine 1 is used to unwind the coiled substrate metal into metal sheet / strip 2.

[0028] The embossing roll mill 5 is used to form millimeter-scale "sine wave" patterns on the surface of the metal sheet / strip 2.

[0029] The wire brush roller 4 is used to treat the surface of the metal sheet and strip 2, removing impurities, debris and oxide layer from the surface of the metal sheet and strip 2, making the metal surface cleaner, and the rotation direction of the wire brush roller 4 is opposite to the movement direction of the metal sheet and strip 2.

[0030] The direct laser interference mechanism 6 is used to form an interference laser, which irradiates the upper surface of the metal strip 2 to form a periodic grid at the micrometer scale. The direct laser interference mechanism 6 adopts four-beam laser interference to form a mesh-like interference fringes. The smallest unit size in the grid is 100~300μm. There are steel wire brush rollers 4 on both the front and rear sides of the direct laser interference mechanism 6.

[0031] The guiding mechanism 7 is a component used for guiding the metal strip 2 to enter the casting and rolling mechanism 10 along a specific path, thereby preventing the metal strip 2 from moving laterally.

[0032] The gas protection cover 8 is located near the junction of the distributor 903 and the side substrate. The gas protection cover 8 has an air inlet 802 and a flat gas nozzle 803 inside. It is used to protect the surface of the metal strip 2 entering the casting and rolling mechanism 10 and prevent the surface oxidation caused by the temperature rise of the metal strip 2 at the front end of the casting and rolling mechanism 10. The protective gas is nitrogen or argon.

[0033] The casting mechanism 9 is used to evenly distribute dissimilar liquid metals at the front end of the casting roll gap.

[0034] The casting and rolling mechanism 10 is used to combine the laser-interfered metal strip 2 with dissimilar liquid metal. The pressure generated by the casting and rolling rolls allows the liquid metal to fully enter the multi-scale microstructure, forming a biomimetic interlock and metallurgical bond at the interface. Furthermore, the cooling effect of the casting and rolling rolls ensures that the metal in contact with the upper and lower rolls solidifies in time to form a solid shell.

[0035] The vibration mechanism 11 is used to support the metal strip 2 and generate stress waves, causing the interface between the metal strip 2 and the dissimilar liquid metal to vibrate. This ensures that the dissimilar liquid metal is fully immersed in the micron-scale microstructure on the upper surface of the metal strip 2 during the casting and rolling process. Furthermore, the vibration can increase the solidification nucleation rate of the liquid metal near the interface and promote the refinement of the interface structure.

[0036] In one embodiment, the embossing roll mill 5 includes an upper roll 501 disposed on one side of the top of the metal strip 2, and a lower roll disposed at the bottom of the upper roll 501 to cooperate with it. A plurality of sinusoidal wave patterns 5011 are uniformly opened on the outer circumference of the upper roll 501. The length of the sinusoidal wave pattern 5011 is 5~15mm, the amplitude is controlled at 5~10mm, the protrusion height is 1~3mm, the cross-section is a semicircle with a diameter of 2~4mm, and the spacing between adjacent sinusoidal wave patterns 5011 is 3~8mm. Thus, under the action of rolling pressure, the upper roll forms millimeter-scale sinusoidal wave patterns 5011 on the upper surface of the metal strip 2, preparing for subsequent interface interlocking.

[0037] In addition, it should be noted that the embossing roll mill 5 includes two rolls, an upper roll and an lower roll, and the two rolls have the same diameter. The outer circumference of the upper roll 501 is evenly provided with several sinusoidal wave patterns 5011, and the surface of the lower roll is smooth and without patterns.

[0038] In one embodiment, the gas protective cover 8 includes a housing 801 disposed on one side of one of the guide mechanisms 7. An air inlet 802 is provided on the outer side wall of the housing 801, and a gas nozzle 803 is provided on the inner side of the housing 801 to cooperate with the air inlet 802. Nitrogen and argon can be introduced through the air inlet 802, and the protective gas can be quickly and evenly sprayed onto the surface of the metal strip 2 through the gas nozzle 803. This prevents oxidation caused by the metal heating of the metal strip 2 near the casting mechanism 9, thereby slowing down the overflow of the protective gas and helping to save protective gas.

[0039] In one embodiment, the casting mechanism 9 includes an intermediate ladle shell 901 disposed on one side of the top of the outer shell 801. A casting nozzle 902 is disposed at the bottom of the intermediate ladle shell 901, and a distributor 903 is disposed at the bottom of the casting nozzle 902. Sealing plates 905 are symmetrically disposed on both sides of the casting nozzle 902 and at the top of the distributor 903. One sealing plate 905 has an air inlet 906 at its top, and the other sealing plate 905 has an exhaust 907 at its top. A side plate is disposed at the bottom of the distributor 903. The bottom two sides of the 05 are symmetrically provided with arc track grooves 904 that match the top of the distributor 903. Thus, a pull-out sealing plate 905 is provided on the distributor 903, which can be quickly opened and closed through the arc track grooves 904 to achieve sealed pouring. The sealing plate 905 is provided with air inlet holes 906 and exhaust holes 907, which can reduce oxidation during the pouring process. The air pressure can be changed by adjusting the airflow, thereby slightly adjusting the pouring speed of the liquid metal. At the same time, the molten liquid metal first enters the intermediate ladle shell 901 and then is evenly distributed laterally on the metal strip 2 through the distributor 903.

[0040] In one embodiment, the vibration mechanism 11 includes a vibration housing 1101 disposed at the bottom of the outer casing 801. A drive gear 1102 is disposed on one side of the inner surface of the vibration housing 1101. The center of the drive gear 1102 is connected to the output end of a motor 1103, and the motor 1103 is disposed on the outer side wall of the vibration housing 1101. A driven gear 11010 meshes with the drive gear 1102 on its outer circumference. A cylindrical protrusion 1104 is eccentrically disposed on one side of the driven gear 11010. A central hammer 1105 is disposed outside the cylindrical protrusion 1104. Several bearings 1106 are symmetrically disposed on both sides of the central hammer 1105, and all bearings 1106 are disposed on the inner side wall of the vibration housing 1101. Side pendulums 1107 are symmetrically arranged on both sides of the top of 105. One end of each set of side pendulums 1107 is connected to the middle hammer 1105 by the first bolt 1108, and the other end of each set of side pendulums 1107 is connected to the inner wall of the vibration housing 1101 by the second bolt 1109. Thus, the motor 1103 drives the drive gear 1102 to rotate, and the drive gear 1102 drives the driven gear 11010 to rotate, thereby driving the side pendulums 1107 and the middle hammer 1105 to alternately strike the lower surface of the metal strip 2, generating vibration. At the same time, under the pressure of the casting and rolling mechanism 10 (including upper and lower casting and rolling rollers), the dissimilar liquid metal is fully immersed in the biomimetic microstructure on the surface of the metal strip 2, and the substrate metal and the dissimilar liquid metal achieve biomimetic interlocking and metallurgical bonding at the interface.

[0041] The working principle of the vibration mechanism 11 is as follows: The motor 1103 drives the drive gear 1102 to rotate. The drive gear 1102 (the ratio of the pitch circle diameter of the drive gear 1102 to the pitch circle diameter of the driven gear 11010 in the vibration mechanism 11 is 2~4) drives the driven gear 11010 to rotate, which in turn drives the side pendulum 1107 and the middle hammer 1105 to alternately strike the lower surface of the metal strip 2, generating vibration. There is an "I" shaped gap at the end of the middle hammer 1105 and the side pendulum 1107. The driven gear 11010 drives the middle hammer 1105 and the side pendulum 1107 to alternately strike the metal strip 2 through the "I" shaped gap.

[0042] like Figure 13 As shown, according to another embodiment of the present invention, a method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking is also provided, the method comprising the following steps: S1. After the metal sheet and strip are unwound and leveled by an uncoiler, the metal sheet and strip are moved forward by several conveying components in coordination. S2. Use a vision sensor to monitor the positional offset of the metal strip during its movement, and correct the position of the metal strip based on the positional offset.

[0043] The step of using a visual sensor to monitor the positional offset of the metal strip during movement and correcting the position of the metal strip based on the positional offset includes the following steps: S21. Use a visual sensor to capture a continuous sequence of images of the metal sheet / strip during its movement, and extract the edge contour features of the metal sheet / strip from the continuous sequence of images.

[0044] It should be noted that capturing a continuous sequence of images of a metal strip during its movement using a visual sensor and extracting the edge contour features of the metal strip from the continuous sequence of images includes the following steps: continuously capturing image sequences during the movement of the metal strip, ensuring the continuity and consistency of the images to facilitate tracking and analysis; preprocessing the captured images, including noise reduction, brightness and contrast adjustment, to improve image quality; using image enhancement techniques to highlight the edges and other key features of the metal strip, and combining edge detection algorithms to extract the edge contour of the metal strip.

[0045] S22. Use a distance tracking algorithm to track the edge contour features of the metal sheet and strip, and generate a real-time tracking trajectory of the metal sheet and strip.

[0046] The step of using a distance tracking algorithm to track the edge contour features of the metal sheet / strip and generating a real-time tracking trajectory for the metal sheet / strip includes the following steps: S221. Using the edge contour features of the metal sheet and strip as the tracking target, extract the grayscale features of the tracking target from the continuous sequence images of the metal sheet and strip. S222. Obtain the distribution characteristics between the tracked target and the candidate target, and calculate the center distance between the tracked target and the candidate target based on the distribution characteristics; S223. Determine the tracking center point based on the center distance between the tracking target and the candidate target, and use the tracking target position in the previous frame image as the search window position of the current frame; S224. Use an iterative algorithm to traverse the search window to find the local optimal tracking target position, so that the tracking center point moves from the starting point to the local optimal tracking target position, thereby generating the tracking trajectory of the metal strip.

[0047] It should be noted that the iterative algorithm used to traverse and find the locally optimal tracking target position within the search window includes the following steps: Set the size of the search window and use it to store possible tracking target position values, with the initial position of the metal strip 2 as the starting point for iteration; in each iteration, calculate all possible new positions based on the current position and the size of the search window (these new positions may be moves from the current position), and add them to the search window; for each new position, calculate the tracking effect (such as acceleration, position change, etc.) and decide whether to accept the current new position as a possible locally optimal solution based on the tracking effect; set evaluation criteria and select the optimal position from all new positions as the current locally optimal solution; once a new locally optimal solution is found, update the search window, add this new position to the window, and remove any new positions that do not meet the requirements from the window.

[0048] S225. While tracking the center point, continuously acquire the search window position of the current frame, and simultaneously perform non-linear updates on the tracking trajectory of the metal strip.

[0049] S23. During the tracking of the metal strip trajectory, the position offset of the metal strip during the movement is calculated every time the metal strip passes through a preset distance point, and a position correction strategy is formulated based on the position offset. S24. Establish the collaborative relationship between the conveying components and the guiding mechanism, and use the position correction strategy to generate the optimal adjustment parameters for each conveying component and the guiding mechanism to correct the offset position of the metal strip.

[0050] It should be noted that establishing the collaborative relationship between the conveying components and the guiding mechanism, and using a position correction strategy to generate the optimal adjustment parameters for each conveying component and the guiding mechanism to correct the offset position of the metal strip includes the following steps: The transmission components and guiding mechanisms are treated as independent game participants, and a collaborative control model for each game participant is established by combining various constraints. Each conveying component and guiding mechanism is treated as an independent control entity, and an initial value is assigned to the optimal representative strategy of each control entity. The state variables and feedback coefficients of each control subject are optimized separately, and the termination conditions of the controller evolution are set, such as reaching a preset number of evolution generations or reaching a certain convergence criterion. In each generation of evolution, the performance indicators of each control subject (such as error, stability, etc.) are evaluated, and individuals with higher fitness are selected for crossover mutation to generate new individuals. When the controller evolves to the preset, a position correction strategy is designed for the control subjects in each region. This strategy should take into account the correction requirements of the offset position of the metal strip and combine the constraints and performance indicators in the cooperative control model to generate appropriate adjustment parameters in order to correct the position of the metal strip. The generated optimal adjustment parameters are applied to each conveying component and guiding mechanism to correct the offset position of the metal strip. Based on the position correction strategy and the state variables of the control subject, feedback control is performed on the control subject in each area to adjust the motion state and position of the conveying component and guiding mechanism so that they work together to correct the position offset of the metal strip.

[0051] S3. Use an embossing roll mill to roll the metal sheet and strip to form a sinusoidal wave pattern on the upper surface of the metal sheet and strip, and use a vision sensor to detect whether there are any defects in the sinusoidal wave pattern. S4. After rolling the metal sheet and strip, the surface of the metal sheet and strip is cleaned by a wire brush roller to remove impurities from the surface of the metal sheet and strip. S5. Irradiate the upper surface of the metal sheet / strip using a direct laser interference mechanism to form a micron-scale periodic grid on the upper surface of the metal sheet / strip, and further remove impurities from the surface of the metal sheet / strip using a wire brush roller. S6. After the metal strip enters the gas protection hood, vibration mechanism and casting and rolling mechanism in sequence through the guiding mechanism, the generated dissimilar liquid metal is evenly distributed in the space enclosed by the upper side of the metal strip, the side sealing plate and the casting and rolling roll. S7. The upper surface of the metal strip comes into contact with the molten dissimilar liquid metal, and in conjunction with the vibration mechanism and casting rolls, the multi-scale microstructure of the metal strip is fully combined with the dissimilar liquid metal to achieve biomimetic interlocking and metallurgical bonding.

[0052] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0053] In practical applications, the coiled substrate metal is first uncoiled into a metal strip 2 using an uncoiler 1. A millimeter-scale sinusoidal wave pattern 5011 is then formed on the upper surface of the metal strip 2 using an embossing roll mill 5. The metal strip 2 then enters a surface treatment mechanism (wire brush roller 4) to remove impurities and debris from its surface. Next, a micrometer-scale grid pattern is formed on the upper surface of the metal strip 2 using a direct laser interference mechanism 6. Following this, the metal strip 2 is guided by a guide mechanism 7 and then enters a gas shield 8. Finally, the metal strip 2 enters a vibration mechanism 11. Simultaneously, the casting mechanism 9 continuously and evenly distributes dissimilar liquid metals onto the upper surface of the metal strip 2, while the side pendulum 1107 and the middle hammer 1105 in the vibration mechanism 11 alternately strike the lower surface of the metal strip 2, forming stress waves that cause the interface metal to vibrate. Finally, under the rolling action of the vibration mechanism 11 and the casting rolls, the dissimilar liquid metals fully enter the biomimetic microstructure on the surface of the metal strip 2, achieving biomimetic interlocking and metallurgical bonding between the upper surface of the metal strip 2 and the dissimilar metals, thereby improving the interfacial bonding strength of the dissimilar metal composite strip.

[0054] In summary, by utilizing the above-mentioned technical solution of this invention, the present invention combines laser processing with embossing roller rolling to form a multi-scale biomimetic structure on the surface of metal sheet and strip. Under the pressure of the casting and rolling rollers, biomimetic interlocking is achieved, simultaneously leveraging mechanical interlocking and metallurgical bonding. This overcomes the limitations of traditional methods that rely solely on single-interface metallurgical bonding. Furthermore, to address the bonding performance requirements of different metal sheet and strip materials, customized multi-scale biomimetic microstructures can be obtained by adjusting the embossing roller pattern and laser parameters, thereby achieving bonding interfaces of different morphologies, demonstrating excellent flexibility. This invention does not require a large amount of rolling deformation, reducing the dependence of interfacial bonding on deformation. It is suitable for preparing dissimilar metal sheet and strip materials with significant differences and difficult bonding, and has a significant advantage for dissimilar metal sheet and strip materials containing intermetallic compounds. Moreover, through sealed casting and... The synergistic effect of the protective gas effectively inhibits the oxidation of liquid metal during the casting and rolling process, helping to reduce the splashing of liquid metal. The sealing cover in the casting mechanism is equipped with air inlet and exhaust holes, and the pouring speed of liquid metal can be slightly adjusted by adjusting the airflow. This invention generates stress waves through a vibration mechanism, causing the interface metal to vibrate, thereby promoting the full entry of dissimilar liquid metals into the multi-scale biomimetic microstructure on the surface of the metal strip, ensuring the formation of biomimetic interlocking during the casting and rolling process. Furthermore, the interface vibration increases the solidification nucleation rate of dissimilar liquid metals near the interface, which is beneficial to the refinement of the interface structure. This invention can monitor the positional deviation of the metal strip in real time, thereby accurately controlling the deviation error of the metal strip during the movement process, correcting the movement position of the metal strip in real time, ensuring that the metal strip moves along the preset route, and thus achieving stable conveying of the metal strip.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking, comprising an uncoiler (1), characterized in that, The bottom end of the uncoiler (1) is provided with a metal strip (2) that cooperates with it. The bottom end of the metal strip (2) is provided with a number of conveying components (3). A wire brush roller (4) is provided between each pair of the several conveying components (3), and the wire brush roller (4) is provided at the top of the metal strip (2). An embossing roll mill (5) is provided between one of the conveying components (3) and one of the wire brush rollers (4) to form a sinusoidal wave pattern on the upper surface of the metal strip (2). A direct laser interference mechanism (6) is provided on the top of the metal strip (2). The direct laser interference mechanism (6) irradiates the upper surface of the metal strip (2) to form a micron-scale periodic grid on the upper surface of the metal strip (2). A plurality of guiding mechanisms (7) are provided on one side of one of the conveying components (3). A gas protective cover (8), a casting mechanism (9) and a casting and rolling mechanism (10) are arranged sequentially between the plurality of guiding mechanisms (7). A vibration mechanism (11) is provided at the bottom of the casting mechanism (9). The vibration mechanism (11) generates stress waves to make the interface metal vibrate, thereby allowing dissimilar liquid metal to enter the multi-scale biomimetic microstructure on the upper surface of the metal strip (2), ensuring that biomimetic interlocking is formed during the casting and rolling process. Furthermore, the interface vibration increases the solidification nucleation rate of dissimilar liquid metal near the interface, thereby refining the interface structure. Visual sensors (12) are provided at both ends of the top of the metal strip (2). The visual sensors (12) monitor the positional offset of the metal strip (2) during the movement process and detect whether there are defects in the sinusoidal wave pattern. The gas shield (8) includes a housing (801) disposed on one side of one of the guide mechanisms (7), an air inlet (802) is provided on the outer side wall of the housing (801), and a gas nozzle (803) is provided on the inner side of the housing (801) to cooperate with the air inlet (802). The vibration mechanism (11) includes a vibration housing (1101) disposed at the bottom of the outer shell (801). A drive gear (1102) is disposed on one side inside the vibration housing (1101). The center of the drive gear (1102) is connected to the output end of the motor (1103), and the motor (1103) is disposed on the outer wall of the vibration housing (1101). The driven gear (11010) is provided with a driven gear (11010) meshing with the outer circumference of the driving gear (1102). A cylindrical protrusion (1104) is provided eccentrically on one side of the driven gear (11010). An intermediate hammer (1105) is provided on the outside of the cylindrical protrusion (1104). Several bearings (1106) are symmetrically arranged on both sides of the intermediate hammer (1105), and the bearings (1106) are all located on the inner sidewall of the vibration housing (1101). The top two sides of the intermediate hammer (1105) are symmetrically provided with side pendulum hammers (1107). One end of the two sets of side pendulum hammers (1107) is connected to the intermediate hammer (1105) by the first bolt (1108), and the other end of the two sets of side pendulum hammers (1107) is connected to the inner wall of the vibration housing (1101) by the second bolt (1109).

2. The device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 1, characterized in that, The embossing roll mill (5) includes an upper roll (501) disposed on one side of the top of the metal strip (2), and a lower roll that cooperates with the upper roll (501) is disposed at the bottom of the upper roll (501).

3. The device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 2, characterized in that, The outer circumference of the upper roll (501) is uniformly provided with a plurality of sinusoidal wave patterns (5011). The length of the sinusoidal wave pattern (5011) is 5~15mm, the amplitude is controlled at 5~10mm, the protrusion height is 1~3mm, the cross-section is a semicircle with a diameter of 2~4mm, and the spacing between adjacent sinusoidal wave patterns (5011) is 3~8mm.

4. The device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 1, characterized in that, The casting mechanism (9) includes an intermediate ladle shell (901) disposed on one side of the top of the outer shell (801). A casting nozzle (902) is provided at the bottom of the intermediate ladle shell (901). A distributor (903) is provided at the bottom of the casting nozzle (902). Sealing plates (905) are symmetrically arranged on both sides of the casting nozzle (902) and at the top of the distributor (903). An air inlet (906) is provided at the top of one of the sealing plates (905), and an exhaust hole (907) is provided at the top of the other sealing plate (905).

5. The device for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 4, characterized in that, The bottom sides of the sealing plate (905) are symmetrically provided with arc track grooves (904) that cooperate with the top of the distributor (903).

6. A method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking, employing the apparatus for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking as described in any one of claims 1-5, characterized in that, The laser-assisted casting and rolling method for dissimilar metals includes the following steps: S1. After the metal sheet and strip are unwound and leveled by an uncoiler, the metal sheet and strip are moved forward by several conveying components in coordination. S2. Use a vision sensor to monitor the positional offset of the metal strip during its movement, and correct the position of the metal strip based on the positional offset. S3. Use an embossing roll mill to roll the metal sheet and strip to form a sinusoidal wave pattern on the upper surface of the metal sheet and strip, and use a vision sensor to detect whether there are any defects in the sinusoidal wave pattern. S4. After rolling the metal sheet and strip, the surface of the metal sheet and strip is cleaned by a wire brush roller to remove impurities from the surface of the metal sheet and strip. S5. Irradiate the upper surface of the metal sheet / strip using a direct laser interference mechanism to form a micron-scale periodic grid on the upper surface of the metal sheet / strip, and further remove impurities from the surface of the metal sheet / strip using a wire brush roller. S6. After the metal strip enters the gas protection hood, vibration mechanism and casting and rolling mechanism in sequence through the guiding mechanism, the generated dissimilar liquid metal is evenly distributed in the space enclosed by the upper side of the metal strip, the side sealing plate and the casting and rolling roll. S7. The upper surface of the metal strip comes into contact with the molten dissimilar liquid metal, and in conjunction with the vibration mechanism and casting rolls, the multi-scale microstructure of the metal strip is fully combined with the dissimilar liquid metal to achieve biomimetic interlocking and metallurgical bonding.

7. A method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 6, characterized in that, The process of using a visual sensor to monitor the positional offset of the metal strip during movement and correcting the position of the metal strip based on the positional offset includes the following steps: S21. Use a visual sensor to capture a continuous sequence of images of the metal sheet and strip during its movement, and extract the edge contour features of the metal sheet and strip from the continuous sequence of images. S22. Use a distance tracking algorithm to track the edge contour features of the metal sheet and strip, and generate a real-time tracking trajectory of the metal sheet and strip. S23. During the tracking of the metal strip trajectory, the position offset of the metal strip during the movement is calculated every time the metal strip passes through a preset distance point, and a position correction strategy is formulated based on the position offset. S24. Establish the collaborative relationship between the conveying components and the guiding mechanism, and use the position correction strategy to generate the optimal adjustment parameters for each conveying component and the guiding mechanism to correct the offset position of the metal strip.

8. A method for laser-assisted casting and rolling of dissimilar metals based on biomimetic interlocking according to claim 7, characterized in that, The process of using a distance tracking algorithm to track the edge contour features of a metal sheet / strip and generating a real-time tracking trajectory for the metal sheet / strip includes the following steps: S221. Using the edge contour features of the metal sheet and strip as the tracking target, extract the grayscale features of the tracking target from the continuous sequence images of the metal sheet and strip. S222. Obtain the distribution characteristics between the tracked target and the candidate target, and calculate the center distance between the tracked target and the candidate target based on the distribution characteristics; S223. Determine the tracking center point based on the center distance between the tracking target and the candidate target, and use the tracking target position in the previous frame image as the search window position of the current frame; S224. Use an iterative algorithm to traverse within the search window to find the local optimal tracking target position, so that the tracking center point moves from the starting point to the local optimal tracking target position, thereby generating the tracking trajectory of the metal strip. S225. While tracking the center point, continuously acquire the search window position of the current frame, and simultaneously perform non-linear updates on the tracking trajectory of the metal strip.

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