A composite material rolling system rolling mill

Abstract

The application discloses a rolling mill of a composite material rolling system and belongs to the technical field of composite material rolling, comprising a roller and a vibration assembly, and transmitting vibration action through a damping coupling path between the vibration assembly and the roller. The damping coupling path is a non-rigid transmission path. When the vibration action of the vibration assembly stimulates the roller through the damping coupling path, a forced vibration system is formed. When the roller is subjected to steady-state and periodic excitation of the vibration assembly, the roller will finally form periodic vibration with a steady-state vibration frequency and amplitude. For a linear system provided by the vibration assembly, when the roller is subjected to steady-state and periodic excitation, the steady-state response of the roller after experiencing a transient process will have the same frequency as the vibration action and the corresponding amplitude will be reduced. Therefore, transmitting vibration through a non-rigid path can more easily realize the process requirement of high frequency and small amplitude.

Description

Technical Field

[0001] This invention belongs to the field of composite material rolling technology, specifically a composite material rolling system mill. Background Technology

[0002] Metal layered composite materials, by stacking different component metals, combine the advantages of each component and are in high demand in aerospace, rail transportation, and defense industries. Rolling composite processes utilize the high pressure of a rolling mill to cause plastic deformation of two or more different metal sheets in a solid state, thereby achieving a tight bond at the atomic level. However, in traditional rolling composite processes, the interface between the composite layers suffers from poor bonding quality due to low slip ratios, insufficient metal fluidity, and inadequate breakage of the oxide film / hardened layer.

[0003] In the rolling process of composite materials, providing the rolls with artificially applied, controllable horizontal vibration of a specific frequency and amplitude is an advanced process improvement technology. On the one hand, the stress alternation generated by the vibration promotes the proliferation and movement of dislocations, reduces the resistance to dislocation movement, and thus promotes the interlocking and interlocking of micro protrusions on the interface; on the other hand, vibration can more effectively break up and remove residual oxide films and contaminant layers at the interface, exposing more fresh, highly active metal atoms.

[0004] Some rolling processes use ultrasound to provide the vibration power source for the rolls, but the energy dissipation and attenuation of ultrasound greatly restrict the development of this technology in the field of vibration rolling. Some rolling processes force the rolls to produce horizontal synchronous reciprocating motion through pistons or eccentric mass blocks, but the vibration generated by this rigid mass block pushing the rolls is characterized by large amplitude and low frequency, which is difficult to meet process requirements. In addition, if the lateral vibration resistance force of the rolls is too large, the forced vibration mode of rigid connection can easily lead to the risk of overload of the vibration components.

[0005] Patent CN108144966A discloses an electromagnetic vibrating roll for rolling metal composite plates. Multiple electromagnetic vibration devices are installed on the mandrel of the roll body. The mechanical energy generated by electromagnetic vibration causes the roll body to vibrate during rolling, thereby breaking up the oxide film on the contact surface of the bimetallic materials. However, the ambient temperature of the rolling mill is usually high, and the electromagnetic vibration devices themselves generate a lot of heat during operation. High temperatures can easily affect the performance of the permanent magnets inside the electromagnetic vibration devices, and it is difficult to install a cooling system inside the roll. Therefore, the service life and operational stability of the vibration devices are insufficient. Summary of the Invention

[0006] The purpose of this invention is to provide a rolling mill for a composite material rolling system to solve the problems mentioned in the prior art.

[0007] A mill for a composite material rolling system is provided, comprising: Rolls; A vibration assembly that transmits vibration to the rolls via a damping coupling path.

[0008] As a further embodiment of the present invention: the damping coupling path includes non-contact electromagnetic excitation between the vibration component and the roll.

[0009] Non-contact electromagnetic excitation transmits vibration energy through an electromagnetic field, avoiding direct mechanical contact. Electromagnetic excitation achieves two key benefits: firstly, it allows the electromagnetic components to be kept away from the high-temperature region of the roll, preventing demagnetization of the permanent magnets; secondly, it utilizes the high-frequency vibration effect of electromagnetic excitation to increase the vibration frequency of the roll.

[0010] As a further embodiment of the present invention: the damping coupling path includes a coupling channel that runs through the inside of the roll, and a damping medium that fills the space between the vibration component and the coupling channel.

[0011] The vibration assembly drives the damping medium to reciprocate within the coupling channel. The vibration is transmitted to the roll through the interfacial shear force and viscous force of the damping medium, forcing the roll and the vibration assembly to couple with each other to transmit the vibration. A damping coupling path is established between the vibration assembly and the roll using a fluid medium, achieving flexible contact while transmitting the vibration and preventing overload damage to the vibration source.

[0012] As a further embodiment of the present invention: the vibration component includes a vibration source, which is used to drive the damping medium to reciprocate within the coupling channel.

[0013] In this scheme, the driving effect of the vibration component is directly applied to the damping medium, forcing the damping medium to flow back and forth. The vibration component and the roll are transmitted through the shear force and viscous force formed between the flow of the damping medium and the coupling channel.

[0014] As a further embodiment of the present invention: the vibration assembly includes a vibration source and a reciprocating rod, the vibration source being used to drive the reciprocating rod to reciprocate within the coupling channel, and the damping medium being filled between the reciprocating rod and the coupling channel.

[0015] In this scheme, the driving effect of the vibration component is applied to the reciprocating rod. The reciprocating motion of the reciprocating rod is transmitted to the inner wall of the coupling channel through the damping medium, thereby forcing the roll to vibrate. There is only a micro-gap between the reciprocating rod and the wall of the coupling channel. The vibration effect is indirectly transmitted to the damping medium through the reciprocating rod, which significantly reduces the transmission path of the interlayer shear force of the damping medium and improves the energy transfer efficiency.

[0016] As a further embodiment of the present invention: the damping medium includes damping blocks and liquid damping, wherein the liquid damping is filled between the two damping blocks.

[0017] The damping block is solid, which provides strong interlayer shear force transmission and seals the liquid damping. The liquid damping is liquid, exhibiting high viscosity and lubricating the damping block. The combination of the damping block and liquid damping significantly improves the vibration coupling between the reciprocating rod and the coupling channel. The damping block and liquid damping promote morphological self-sustaining, performance complementarity, and enhanced effect.

[0018] As a further embodiment of the present invention: the inner wall of the coupling channel is formed with helical rifling.

[0019] The helical rifling forces the flow of the liquid damping medium within the coupling channel to change from a linear reciprocating motion to a partially helical propulsion, increasing the flow resistance of the damping medium and thus improving energy transfer efficiency. The helical rifling enhances the laminar flow effect of the liquid damping medium, strengthens the steady-state and periodicity of the excitation, maintains linear transmission of the system, and thus improves the synchronous frequency response of the rolls.

[0020] As a further embodiment of the present invention: the plurality of coupling channels are arranged circumferentially along the roll.

[0021] The synchronous vibration within multiple coupled channels can create a resonance effect. Connecting multiple channels in parallel increases the contact area between the damping medium and the rolls, thereby improving energy transfer efficiency.

[0022] As a further embodiment of the present invention: the roll includes an outer roll and an inner roll arranged sequentially from the outside to the inside, and the coupling channel is formed inside the inner roll.

[0023] The coupling channel is built into the inner roll, which is dedicated to vibration transmission, while the outer roll is responsible for the rolling force, thus preventing the coupling channel from affecting the rolling strength of the roll surface. Compared to the outer roll, which is dedicated to the rolling force, the inner roll can be made of a material that is more closely compatible with the damping medium.

[0024] As a further embodiment of the present invention: the end of the roll is provided with an elastic damping element.

[0025] Elastic damping elements are installed at the ends of the rolls, which can effectively reduce the height of the resonance peak, weaken the inertial effect of the roll vibration, provide mechanical buffering, and define the physical path and characteristics of the coupling in the system.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The damped coupling path is a non-rigid transmission path. When the vibration of the vibrating component excites the roll through the damped coupling path, a forced vibration system is formed. When the roll is subjected to steady-state, periodic excitation by the vibrating component, the roll will eventually form a periodic vibration with a steady-state frequency and amplitude. Vibration promotes the embedding of micro-protrusions at the metal interface and the breakage of the oxide film, thereby improving the bonding quality of the composite material.

[0027] 2. The damping coupling path has energy buffering characteristics, which can absorb vibration shocks and prevent the vibration components from directly bearing the inertial resistance of the rolls. This prevents the vibration components from overloading due to excessive roll resistance, and significantly improves the lifespan and operational stability of the vibration system.

[0028] 3. For linear systems provided by vibration components, when the roll is subjected to steady-state, periodic excitation, the steady-state response reached by the roll after experiencing a transient process will have the same frequency as the vibration action, but with a corresponding reduction in amplitude. Therefore, transmitting vibration through a non-rigid path makes it easier to achieve the process requirements of high frequency and small amplitude. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the rolling mill provided by the present invention; Figure 2 This is one of the structural schematic diagrams of the vibration system provided in the embodiments of the present invention; Figure 3 This is a second schematic diagram of the structure of the vibration system provided in an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of region A in the middle.

[0031] In the diagram: 1. Roll; 11. Coupling channel; 12. Outer roll; 13. Inner roll; 14. Upper roll; 15. Lower roll; 2. Vibration assembly; 21. Vibration source; 22. Reciprocating rod; 31. Elastic damping component; 32. Damping medium; 321. Damping block; 322. Liquid damping; 4. Platform; 5. Lifting mechanism; 61. Actuator; 62. Universal joint. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.

[0033] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.

[0034] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the invention and are not intended to limit the subject matter of the claims.

[0035] Please see Figure 1 As shown, the composite material rolling system mill in this embodiment of the invention includes a roll 1 and a vibration component 2. The vibration component 2 and the roll 1 transmit vibration through a damping coupling path.

[0036] The rolling mill provided by this invention is used in the rolling process of metal layered composite materials. Specifically, it includes a frame 4, a lifting mechanism 5, and a drive mechanism. The rolls 1 include an upper roll 14 and a lower roll 15. The lifting mechanism 5 is located at the top of the frame 4 and cooperates with the upper roll 14 to drive the upper roll 14 to rise and fall. The lifting mechanism 5 has two constraint points along the length of the upper roll 14 to restrict its radial movement. The upper roll 14 and the constraint points have rotational and axial degrees of freedom. The lower roll 15 cooperates with the frame 4. The frame 4 has two constraint points along the length of the lower roll 15 to restrict its radial movement. The lower roll 15 and the constraint points have rotational and axial degrees of freedom. It should be noted that the vibration system provided by this invention can act on the upper roll 14 or the lower roll 15 alone, or simultaneously on both. Whether the roll 1 has axial degrees of freedom between itself and the constraint points is determined by whether vibration is applied to the roll.

[0037] Since the rolling mill is used for rolling composite materials, the drive mechanism consists of two sets of actuators 61 and universal joints 62. The two actuators 61 drive the upper roll 14 or the lower roll 15 to rotate through the corresponding universal joints 62. The upper roll 14 and the lower roll 15 are driven by independent actuators 61 to meet the speed difference requirements between different rolls 1 due to the different ductility of different materials, so as to compensate for the deformation difference between materials.

[0038] To enhance the interlayer bonding effect between different component metals, the rolling mill applies axial vibration to the roll 1 during the rolling process. The vibration promotes the embedding of microscopic protrusions at the metal interface and the breakage of the oxide film, thereby improving the bonding quality of the composite material. The vibration is generated by the vibration component 2. Unlike the direct transmission of vibration energy through rigid connection, the rolling mill of this invention establishes a damped coupling path between the vibration component 2 and the roll 1, transmitting vibration energy through non-contact or flexible contact.

[0039] Specifically, the damped coupling path refers to the non-rigid physical connection channel established between the vibration component 2 and the roll 1. This channel uses space isolation and / or damping as the medium for transmitting vibration energy, realizing controllable energy transfer and dynamic response adjustment between the vibration component 2 and the roll 1. The vibration component 2 provides a steady-state, periodic linear excitation to the roll 1. Since the connection between the vibration component 2 and the roll 1 is non-rigid, the steady-state response of the roll 1 system after a delay process will have the same frequency as the excitation source.

[0040] It should be noted that the vibration component 2 provides vibration energy through the vibration source 21. The existence of the damping coupling path does not change the frequency of the steady-state response of the roll 1; it mainly affects the amplitude and phase of the response. Due to the energy dissipation process of damping, the amplitude of the roll 1 in the final steady state is less than the amplitude of the excitation source. Therefore, compared with the low-frequency forced vibration of rigid connections and the low-amplitude ultrasonic vibration with a fast energy dissipation rate, this invention can provide a vibration source 21 with a higher excitation frequency to increase the response frequency of the roll 1, and provides a basis for increasing the vibration amplitude range of the roll 1 by increasing the power of the vibration source 21. In contrast, vibration devices such as hydraulic vibrators are limited by the switching frequency of the reversing valve, and the vibration frequency is usually only below 50Hz.

[0041] It should be further noted that the presence of damping causes the vibration of roll 1 to lag behind the vibration of vibration source 21. That is, although they have the same steady-state frequency, they are not in phase, and roll 1 has a certain delay time in entering the steady-state vibration state and entering the steady-state stopping state.

[0042] Specifically, please refer to Figure 1 As shown, the damping coupling path includes non-contact electromagnetic excitation between the vibration component 2 and the roll 1. That is, the vibration component 2 interacts with the permanent magnet through the alternating magnetic field generated by the current, producing a vibration frequency significantly higher than 50Hz. The specific process of electromagnetic excitation is as follows: a high-frequency alternating current is passed through the electromagnetic coil in the vibration component 2 to generate an alternating magnetic field. The permanent magnet has induced eddy currents, and the eddy current magnetic field interacts with the original magnetic field to generate the vibration source 21.

[0043] In one specific embodiment, a permanent magnet is located at one end of the roll 1, and there is an extension section between the permanent magnet and the end of the roll 1. The permanent magnet and the roll 1 are rigidly connected to transmit vibration energy. The electromagnetic coil and the permanent magnet are not in the same structural system. Since the electromagnetic coil and the permanent magnet can be physically isolated from the high-temperature roll 1, high-temperature demagnetization is effectively avoided. Furthermore, due to the spatial isolation between the electromagnetic coil and the permanent magnet, the vibration component 2 is prevented from overloading due to excessive resistance force from the roll 1.

[0044] Specifically, please refer to Figure 2 As shown, the damping coupling path includes a coupling channel 11 that runs through the inside of the roll 1, and a damping medium 32 that fills the space between the vibration component 2 and the coupling channel 11. The high-frequency vibration provided by the vibration source 21 is indirectly transmitted to the roll 1 through the damping medium 32 in the coupling channel 11, giving the roll 1 a dynamic response process. Specifically, the damping medium 32 is forced to move within the coupling channel 11, converting the mechanical energy of the vibration source 21 into the kinetic energy of the damping medium 32. The interlaminar shear force generated when the damping medium 32 moves pushes the wall of the coupling channel 11, thereby pushing the roll 1 to move.

[0045] In one specific embodiment, the vibration source 21 is composed of a permanent magnet and an electromagnetic coil, both of which are located within the vibration assembly 2 to form a structural system. The permanent magnet, as the vibration output end, generates piston motion under the alternating magnetic field of the electromagnetic coil. The damping medium 32 is liquid, and the piston at the front end of the vibration source 21 changes the flow direction of the damping medium 32 by doing work. The damping medium 32 then reciprocates within the coupling channel 11, thereby forcing the roll 1 to respond to vibration.

[0046] In this scheme, the vibration source 21 and the roll 1 are physically isolated by the damping medium 32. The driving effect of the vibration component 2 is directly applied to the damping medium 32, forcing the damping medium 32 to flow back and forth. The vibration component 2 and the roll 1 are transmitted through the flow of the damping medium 32 and the shear force and viscous force formed between the coupling channel 11.

[0047] It should be noted that, under the flexible connection system between the damping medium 32 and the coupling channel 11, the vibration source 21 can also use hydraulic vibrators, reciprocating compressors and pumps as driving sources, which can avoid the load.

[0048] Further, please refer to Figure 3As shown, the vibration assembly 2, in addition to the vibration source 21, also includes a reciprocating rod 22. The vibration source 21 drives the reciprocating rod 22 to reciprocate within the coupling channel 11. A damping medium 32 fills the space between the reciprocating rod 22 and the coupling channel 11. The reciprocating rod 22 extends into the coupling channel 11, establishing a flexible connection with it through the damping medium 32. The extension of the reciprocating rod 22 increases the force transmission area between the vibration source 21 and the roll 1, thereby increasing the shear force and viscous force transmission area of ​​the damping medium 32 and improving energy transfer efficiency.

[0049] In one specific embodiment, the vibration source 21 consists of a permanent magnet and an electromagnetic coil, both of which are located within the vibration assembly 2, forming a structural system. The permanent magnet, serving as the vibration output end, is positioned at the end of the reciprocating rod 22, while the front end of the reciprocating rod 22 extends into the coupling channel 11. Under the alternating magnetic field of the electromagnetic coil, the permanent magnet forces the reciprocating rod 22 to produce piston-like motion. The extended end of the reciprocating rod 22 performs work, transmitting the vibration to the damping medium 32, thus achieving a flexible connection and kinetic energy transfer between the vibration assembly 2 and the roll 1.

[0050] Furthermore, the reciprocating rod 22 can be used as an extension rod to extend the distance between the vibration assembly 2 and the roll 1, thereby preventing the permanent magnet from demagnetizing due to the hot area of ​​the roll 1.

[0051] In one specific embodiment, the damping medium 32 is a compression spring.

[0052] In summary, since a damping effect is established between roll 1 and vibration assembly 2 through damping medium 32, damping medium 32 can effectively reduce the height of the vibration peak of roll 1, weaken the inertial effect of roll 1 vibration, and avoid the difficulty of vibration return of roll 1 due to the lack of reaction force limitation. Roll 1 and vibration assembly 2 constitute two coupled dynamic subsystems, and damping medium 32, as the coupling path between the two dynamic subsystems, participates in shaping the dynamic interaction between the two subsystems, providing a phase shift path for roll 1 while providing the reaction force for return.

[0053] Further, please refer to Figure 3 and Figure 4 As shown, the damping medium 32 includes damping blocks 321 and liquid damping 322, with the liquid damping 322 filling the space between the two damping blocks 321.

[0054] In one embodiment, the inner ring of the damping block 321 is fixed to the reciprocating rod 22, and the outer ring of the damping block 321 slides in contact with the coupling channel 11 during the reciprocating motion of the reciprocating rod 22. This scheme mainly transmits vibration and constructs vibration return damping through the shear force and viscous force between the liquid damper 322 and the coupling channel 11. The damping block 321 acts as a seal to constrain the shape of the liquid damper 322, while the liquid damper 322 provides lubrication to the damping block 321.

[0055] In one embodiment, the inner ring of the damping block 321 is fixed to the reciprocating rod 22, while the outer ring of the damping block 321 is fixed to the coupling channel 11. This scheme mainly transmits vibration through the interlayer shear force of the damping block 321 itself and constructs vibration return damping.

[0056] The inner wall of the coupling channel 11 is formed with spiral rifling. The spiral rifling is used to guide the liquid damping medium 32 to achieve spiral flow, thereby increasing the resistance between the damping medium 32 and the coupling channel 11 and improving the energy transfer efficiency.

[0057] Multiple coupling channels 11 are arranged along the circumference of the roll 1. Single-channel excitation causes excessive local stress in the roll 1. The multi-channel distribution achieves uniform pressure distribution in the circumference of the roll 1, thereby suppressing the amplitude fluctuation of the roll 1.

[0058] Please see Figure 2 and Figure 3 As shown, the rolling mill 1 includes an outer roller 12 and an inner roller 13 arranged sequentially from the outside to the inside, and a coupling channel 11 is formed inside the inner roller 13. The inner roller 13 and the outer roller 12 are made of different materials. The outer roller 12 is used to press the sheet metal, while the inner roller 13 is used for vibration transmission.

[0059] Please see Figure 1 As shown, an elastic damping element 31 is provided at the end of the roll 1. When the vibration assembly 2 transmits vibration to the roll 1 through non-contact electromagnetic excitation, the elastic damping element 31 at the end of the roll 1 provides a buffering effect. However, when the coupling channel 11 runs through the inside of the roll 1, and the space between the vibration assembly 2 and the coupling channel 11 is filled with a damping medium 32, although the damping medium 32 provides a buffering effect during vibration, if the damping medium 32 is a liquid damper 322, the damping medium 32 does not have the potential energy storage capacity similar to a spring. Under the action of vibration, the roll 1 may have a large displacement relative to the constraint point. Therefore, the elastic damping element 31 provides displacement constraint here, limiting the positional displacement of the roll 1 within a certain range.

[0060] In one specific embodiment, the elastic damping element 31 is a spring or an elastic block.

[0061] It should be noted that the present invention is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments that have the same structure and perform the same effects as the technical concept within the scope of the present invention are included within the scope of the present invention. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of the present invention, are also included within the scope of the present invention.

Claims

1. A rolling mill for a composite material rolling system, characterized in that, include: The roller (1) and the vibration assembly (2) transmit vibration between the vibration assembly (2) and the roller (1) through a damping coupling path. The damping coupling path includes non-contact electromagnetic excitation between the vibration assembly (2) and the roller (1). The damping coupling path includes a coupling channel (11) that runs through the inside of the roller (1) and a damping medium (32) that fills the space between the vibration assembly (2) and the coupling channel (11). The vibration assembly (2) includes a vibration source (21) and a reciprocating rod (22). The vibration source (21) is used to drive the reciprocating rod (22) to reciprocate within the coupling channel (11). The damping medium (32) fills the space between the reciprocating rod (22) and the coupling channel (11). The vibration source (21) is composed of a permanent magnet and an electromagnetic coil. The permanent magnet is set at the end of the reciprocating rod (22) as the vibration output end. The front end of the reciprocating rod (22) extends into the coupling channel (11). Under the alternating magnetic field of the electromagnetic coil, the permanent magnet forces the reciprocating rod (22) to generate piston motion. The reciprocating rod (22) extends into the end and does work to transmit the vibration to the damping medium (32). The damping medium (32) includes a damping block (321) and a liquid damper (322). The liquid damper (322) is filled between two damping blocks (321). The inner wall of the coupling channel (11) forms a spiral rifling. Multiple coupling channels (11) are arranged circumferentially along the roll (1). The roll (1) includes an outer roll (12) and an inner roll (13) arranged sequentially from the outside to the inside. The coupling channel (11) is formed inside the inner roll (13). An elastic damping element (31) is provided at the end of the roll (1).

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