An adaptive electric field assisted metal rolling apparatus

Abstract

The application discloses a self-adaptive electric field auxiliary metal rolling equipment and relates to the technical field of rolling equipment. The self-adaptive electric field auxiliary metal rolling equipment comprises a roller device and an electric field auxiliary device. The roller device comprises a rolling mill rack and two rollers arranged on the rolling mill rack and capable of linear rotation around their own axes. The electric field auxiliary device comprises an electric brush assembly, a first rotating shaft assembly, a second rotating shaft assembly and a locking assembly. The electric brush assembly comprises a plurality of flexible conductive brush heads arranged in sequence. The electric brush assembly is movable along the axial direction of the roller and is connected to the first rotating shaft assembly through the second rotating shaft assembly. The electric brush assembly is rotatable around the axis of the first rotating shaft assembly and the axis of the second rotating shaft assembly. The axis of the first rotating shaft assembly is perpendicular to the axis of the second rotating shaft assembly. The axis of the first rotating shaft assembly is parallel to the axis of the roller. After the relative position of the electric brush assembly and the roller is adjusted, the locking assembly limits and fixes the electric brush assembly. The flexible conductive brush head can be adaptively adjusted at multiple angles and in multiple directions, and the electric field auxiliary can be provided at multiple angles and in multiple directions according to the metal plate type.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rolling equipment, in particular to a self-adaptive electric field assisted metal rolling equipment. BACKGROUND

[0002] In recent years, pulse current assisted plastic processing technology can effectively refine the microstructure of materials, promote atomic diffusion, relieve stress concentration and realize strain delocalization by virtue of its joule heating effect and electroplastic effect, thereby significantly improving the toughness and strength of the processed materials, and showing broad application prospects in the field of metal plate rolling.

[0003] The current electric field assisted rolling technology can be applied to two categories of processing objects: single metal plate and dissimilar metal composite plate. For single metal plate, the rolling strategy differs depending on its crystal structure and deformation characteristics. For example, magnesium alloy, titanium alloy and tungsten alloy, etc. of hexagonal close-packed structure (HCP) metal often need to introduce electric field assistance before or at the entrance of rolling, to reduce its deformation resistance or flow stress through the thermal effect and electron wind force effect of pulse current; while for aluminum alloy, copper alloy, tantalum alloy, etc. of face-centered cubic or body-centered cubic structure (FCC / BCC) metal, they often have good plasticity, but are prone to work hardening and texture strengthening during rolling, so it is suitable to apply electric field assistance after rolling or at the exit to relieve residual stress and restore processing performance.

[0004] For dissimilar metal composite plates (such as magnesium / aluminum, steel / aluminum, titanium / steel composite plates, etc.), due to the significant difference in plastic deformation ability between the two sides of the metal material, the easily deformable metal side extends well, while the difficult-to-deform metal side extends insufficiently, which easily causes quality problems such as plate warping and poor bonding performance after rolling. By applying pulse current to the difficult-to-deform metal side, the deformation ability can be effectively improved, thereby coordinating the deformation behavior on both sides, enhancing the interface bonding strength, and improving the overall performance of the composite plate. However, the existing electric field assisted forming methods are single current paths, which are difficult to adapt to the individual needs of different materials and different processes.

[0005] Therefore, how to adapt to various plate materials and provide multiple current paths to achieve more efficient electric field assistance is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0006] The purpose of the present application is to provide a self-adaptive electric field assisted metal rolling equipment to meet the needs of various plate materials and provide multiple current paths to achieve more efficient electric field assistance.

[0007] In order to achieve the above purpose, the present application provides the following technical solutions:

[0008] A self-adaptive electric field assisted metal rolling equipment, comprising:

[0009] Roller device, comprising a rolling mill stand and two rollers arranged along the up and down direction, both of which are arranged on the rolling mill stand and can rotate around their own axes;

[0010] Electric field auxiliary device, comprising a brush assembly, a first rotating shaft assembly, a second rotating shaft assembly and a locking assembly, the brush assembly comprises a plurality of flexible conductive brush heads arranged in sequence, the brush assembly can move along the axis direction of the roller, the brush assembly is connected to the first rotating shaft assembly through the second rotating shaft assembly, and the brush assembly can rotate around the axis of the first rotating shaft assembly and the axis of the second rotating shaft assembly respectively, the axis of the first rotating shaft assembly is perpendicular to the axis of the second rotating shaft assembly, the axis of the first rotating shaft assembly is parallel to the axis of the roller, and after adjusting the relative position of the brush assembly and the roller, the brush assembly is fixed by the locking assembly.

[0011] Optionally, in the above-mentioned self-adaptive electric field auxiliary metal rolling device, the self-adaptive electric field auxiliary metal rolling device comprises a sliding rail assembly, the sliding rail assembly comprises a guide rail and a guide rail slider slidingly connected to the guide rail, the guide rail is arranged on the rolling mill stand, and the guide rail extends along the axis direction of the roller, and the brush assembly is connected to the guide rail slider.

[0012] Optionally, in the above-mentioned self-adaptive electric field auxiliary metal rolling device, the locking assembly comprises a knob locking nut, the knob locking nut is arranged on the guide rail slider, and the guide rail slider on the guide rail is fixed by rotating the knob locking nut.

[0013] Optionally, in the above-mentioned self-adaptive electric field auxiliary metal rolling device, the electric field auxiliary device further comprises a base, the locking assembly further comprises a ratchet assembly and a limiting assembly, the ratchet assembly comprises a first ratchet, a second ratchet and a compression spring, the first rotating shaft assembly comprises a spline transmission shaft and a connecting shaft, the axis of the spline transmission shaft and the axis of the connecting shaft are located on the same axis and are parallel to the axis of the roller;

[0014] The first ratchet is fixedly connected with the spline transmission shaft, the spline transmission shaft is rotatably connected with the base around its own axis, and the brush assembly is connected with the spline transmission shaft;

[0015] The second ratchet wheel is sleeved on the connecting shaft and is movable along the axis of the connecting shaft, the compression spring is sleeved on the connecting shaft, the first end of the compression spring abuts against the second ratchet wheel, and the second end of the compression spring is limited on the connecting shaft.

[0016] Optionally, in the adaptive electric field assisted metal rolling device, the ratchet wheel assembly further comprises a pulling knob, the connecting shaft is fixed with a blocking ring, the second end of the compression spring abuts against the blocking ring, and the blocking ring is provided with a through hole;

[0017] The pulling knob is sleeved on the connecting shaft and is movable along the axis of the connecting shaft, one end of the pulling knob is fixedly connected with the second ratchet wheel through the through hole, and the other end of the pulling knob is fixed with a pulling piece.

[0018] Optionally, in the adaptive electric field assisted metal rolling device, the limiting component comprises a protrusion arranged on the inner wall of the second ratchet wheel and a sliding groove arranged on the connecting shaft, the sliding groove extends along the axis of the connecting shaft, and the protrusion is slidably embedded in the sliding groove.

[0019] Optionally, in the adaptive electric field assisted metal rolling device, the electric field assisting device further comprises an L-shaped rod and an extension rod, the second rotating shaft assembly comprises a damping turntable, the extension rod comprises a plurality of joint rods which are sequentially sleeved, the length of the extension rod is adjusted by the joint rods which are telescopic along the axis of the extension rod, one end of the extension rod is connected with the first rotating shaft assembly, the other end of the extension rod is connected with one end of the L-shaped rod, the other end of the L-shaped rod is connected with the brush assembly through the damping turntable, and the axis of the damping turntable is arranged perpendicularly to the axis of the first rotating shaft assembly through the L-shaped rod.

[0020] Optionally, in the adaptive electric field assisted metal rolling device, a plurality of extension rods are arranged, each of the extension rods is connected with the first rotating shaft assembly, and the extension rods are fixedly connected in series, and the L-shaped rod is connected with one of the extension rods.

[0021] Optionally, in the adaptive electric field assisted metal rolling device, the brush assembly further comprises a brush base, a torsion spring, a rotating shaft and a limiting shaft.

[0022] The flexible conductive brush head is rotatably connected to the brush base through the rotating shaft, the torsion spring is sleeved on the rotating shaft, the extending end of the torsion spring abuts against one side of the flexible conductive brush head, and the limiting shaft is located at the other side of the flexible conductive brush head, so that the flexible conductive brush head abuts against the limiting shaft through the elastic force of the torsion spring.

[0023] Optionally, in the adaptive electric field assisted metal rolling device, the flexible conductive brush head comprises a supporting shell, an inflatable bag, a conductive sheet and a sliding rod, the inflatable bag is provided with an inflation nozzle for inflating the inner cavity, and the supporting shell is provided with an opening and a sliding groove in sliding cooperation with the sliding rod.

[0024] The supporting shell is sleeved on the outer side of the inflatable bag, the conductive sheet and the inflatable bag located at one side of the opening of the supporting shell are both arc-shaped structures for abutting, and the two ends of the conductive sheet are connected to the sliding groove through the sliding rod, and the sliding groove extends along the extending direction of the conductive sheet.

[0025] Compared with the prior art, in the adaptive electric field assisted metal rolling device, the two rollers in the roller device are arranged in an up-down mode and rotatably mounted on the rolling mill stand, the brush assembly in the electric field assisted device for passing current has a plurality of flexible conductive brush heads arranged in sequence, the brush assembly is movable along the axial direction of the roller, the brush assembly is connected to the first rotating shaft assembly through the second rotating shaft assembly, the brush assembly is rotatable around the axis of the first rotating shaft assembly and the axis of the second rotating shaft assembly, respectively, the axis of the first rotating shaft assembly is perpendicular to the axis of the second rotating shaft assembly, and the axis of the first rotating shaft assembly is parallel to the axis of the roller, so that the flexible conductive brush head can be adjusted in multiple angles and multiple directions in real time, the electric field is applied to the metal plate in multiple angles and multiple directions, and after the position adjustment of the flexible conductive brush head is completed, the brush assembly is fixed and limited by the locking assembly, so that the flexible conductive brush head has good stability during the application of the electric field, a plurality of plate materials are provided, a plurality of current paths are provided, and higher efficient electric field assistance is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0027] Figure 1 A structure schematic view of the adaptive electric field assisted metal rolling device disclosed in the embodiments of the application;

[0028] Figure 2 A structure schematic view of the roller disclosed in the embodiments of the application;

[0029] Figure 3 This is a schematic diagram of the structure of the electric field auxiliary device disclosed in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the slide rail assembly disclosed in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the ratchet assembly disclosed in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the second ratchet disclosed in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the connecting shaft disclosed in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the brush assembly disclosed in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the flexible conductive brush head disclosed in an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the wire arrangement of the brush assembly disclosed in an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the damping turntable disclosed in an embodiment of the present invention;

[0038] Figure 12 This is one of the schematic diagrams of the electric field auxiliary device arrangement disclosed in the embodiments of the present invention;

[0039] Figure 13 This is a second schematic diagram of the arrangement of the electric field auxiliary device disclosed in an embodiment of the present invention;

[0040] Figure 14 This is the third schematic diagram of the electric field auxiliary device arrangement disclosed in the embodiments of the present invention;

[0041] Figure 15 This is the fourth schematic diagram of the electric field auxiliary device arrangement disclosed in the embodiments of the present invention;

[0042] Figure 16 This is a schematic diagram of a magnesium / aluminum composite plate rolled by an adaptive electric field assisted metal rolling equipment according to an embodiment of the present invention, and a magnesium / aluminum alloy plate hot-rolled in a heating furnace in the prior art.

[0043] Figure 17 This is a comparison chart of the interfacial shear strength test results of magnesium / aluminum composite plates rolled by an adaptive electric field assisted metal rolling equipment and magnesium / aluminum composite plates hot-rolled in a heating furnace in the prior art, as disclosed in an embodiment of the present invention.

[0044] Figure label:

[0045] 100 is the rolling mill assembly, 110 is the mill stand, 120 is the rolling mill roll, 121 is the conductive roller sleeve, and 122 is the spline mandrel.

[0046] 200 is an electric field auxiliary device, 210 is a brush assembly, 211 is a flexible conductive brush head, 211-1 is a supporting shell, 211-2 is an inflatable bladder, 211-3 is a conductive sheet, 211-4 is a sliding rod, 212 is a brush base, 213 is a torsion spring, 214 is a rotating shaft, 215 is a limiting shaft, 216 is a brush switch, 217 is a main control wire, 218 is a sub-control switch wire, 220 is a base, 230 is a spline drive shaft, 240 is a connecting shaft, 241 is a blocking ring, 242 is a sliding groove, 250 is an L-shaped rod, and 260 is a telescopic rod.

[0047] 300 is the slide rail assembly, 310 is the guide rail, and 320 is the guide rail slider;

[0048] 400 is a knob lock nut;

[0049] 500 is the ratchet assembly, 510 is the first ratchet, 520 is the second ratchet, 521 is the protrusion, 530 is the compression spring, and 540 is the pull knob;

[0050] 600 is a damping turntable, 610 is a driving turntable, 620 is a driven turntable, 630 is a threaded fixed shaft, 640 is a limit screw, 650 is a damping plate, 660 is a limit plate, and 670 is a lock nut. Detailed Implementation

[0051] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0052] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0054] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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, they should not be construed as limitations on this invention.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] like Figure 1 and Figure 2As shown, this invention discloses an adaptive electric field-assisted metal rolling apparatus, including a roll assembly 100 and an electric field-assisted device 200. The roll assembly 100 includes a mill frame 110 and two rolls 120. The two rolls 120, arranged vertically, are rotatably mounted on the mill frame 110 around their own axes. The two rolls 120 roll the metal sheet. Each roll 120 includes a conductive roll sleeve 121 and a splined mandrel 122. The inner wall of the conductive roll sleeve 121 has grooves that mate with protrusions on the splined mandrel 122. The outer surface of the conductive roll sleeve 121 is made of molybdenum-zirconium-titanium alloy, while the inner wall of the conductive roll sleeve 121 is insulated by a 2mm thick ceramic coating applied using cold spray additive manufacturing technology. The electric field auxiliary device 200 includes a brush assembly 210, a first rotating shaft assembly, a second rotating shaft assembly, and a locking assembly. The brush assembly 210 includes a plurality of flexible conductive brush heads 211 arranged in sequence. The brush assembly 210 is movable along the axial direction of the roll 120, and its position can be adjusted along the axial direction of the roll 120. The brush assembly 210 is connected to the first rotating shaft assembly via the second rotating shaft assembly, and the brush assembly 210 can rotate around the axes of the first rotating shaft assembly and the second rotating shaft assembly, respectively. The axis is perpendicular to the axis of the second rotating shaft assembly, while the axis of the first rotating shaft assembly is parallel to the axis of the roll. This allows for multiple angular position adjustments through the rotation of the brush assembly 210. Therefore, the brush assembly 210 can be adjusted in real time at multiple angles and directions, applying an electric field to the rolling surface or transverse section of the metal sheet. Utilizing the rapid heating characteristic of current, energizing before rolling can improve the aging of hot rolling and increase its plastic deformation capacity. Energizing after rolling can achieve the purpose of annealing and controlling the microstructure, improving the residual stress of the rolled sheet. Of course, an electric field can also be applied to one side of the roll surface and the surface of the metal sheet to control the deformation coordination of the composite plate. This achieves the application of electric fields to the metal sheet from multiple angles and directions. Furthermore, after the position adjustment of the brush assembly 210 is completed, the locking assembly limits and fixes the brush assembly 210, ensuring good stability of the flexible conductive brush head 211 during the application of the electric field. This accommodates various sheet materials and provides multiple energizing paths to achieve more efficient electric field assistance.

[0057] like Figure 3 and Figure 4As shown, in a specific embodiment, the adaptive electric field assisted metal rolling equipment provided in this embodiment includes a slide rail assembly 300. The slide rail assembly 300 includes a guide rail 310 and a guide rail slider 320. The guide rail slider 320 is slidably connected to the guide rail 310. The guide rail 310 is fixed to the mill stand 110. The guide rail 310 extends along the axial direction of the roll 120. The brush assembly 210 is mounted on the guide rail slider 320, thus realizing the movement of the brush assembly 210 along the axial direction of the roll 120. Furthermore, the guide rail 310 provided in this embodiment is mounted and fixed on the frame of the rolling mill device 100, that is, the electric field auxiliary device 200 is directly mounted on the rolling mill device 100, which improves the integration of the entire equipment. Moreover, the number and installation position of the electric field auxiliary device 200 can be set according to actual needs. For example, two electric field auxiliary devices 200 are set at the steel inlet end of the rolling mill device 100. Before the steel is rolled, current is passed to the steel through the electric field auxiliary device 200, and / or arranged at the output end of the steel entering the rolling mill device 100. That is, after the steel is rolled, current is passed to the steel through the electric field auxiliary device 200, and the mechanical properties of the composite plate are adjusted by utilizing the rapid heating characteristic of the electric field.

[0058] like Figure 4 As shown, in a more specific embodiment, the locking component includes a knob locking nut 400, which is rotatably mounted on the guide rail slider 320. By rotating the knob locking nut 400, the guide rail slider 320 on the guide rail 310 is limited and locked, preventing the guide rail slider 320 from continuing to slide, thereby ensuring the stability of the brush assembly 210 connected to the guide rail slider 320.

[0059] like Figure 5 and Figure 7As shown, in a specific embodiment, the electric field assist device 200 further includes a base 220, and the locking assembly further includes a ratchet assembly 500 and a limiting assembly. The ratchet assembly 500 includes a first ratchet 510, a second ratchet 520, and a compression spring 530. The first rotating shaft assembly includes a spline drive shaft 230 and a connecting shaft 240, wherein the spline drive shaft 230 and the connecting shaft 240 are arranged opposite to each other, and the axis of the spline drive shaft 230 and the axis of the connecting shaft 240 are located on the same axis and are arranged parallel to the axis of the roll 120. The first ratchet 510 is fixedly connected to the spline drive shaft 230. The spline drive shaft 230 and the first ratchet 510 are synchronously rotatable on the mounting base 220. The brush assembly 210 is mounted on the spline drive shaft 230. The second ratchet 520 is sleeved on the connecting shaft 240 and can move along the axial direction of the connecting shaft 240. The compression spring 530 is also sleeved on the connecting shaft 240, with its first end abutting against the second ratchet 520 and its second end fixed to the connecting shaft 240. The compression spring 530 is in a compressed state. Under the elastic force of the compression spring 530, the second… Ratchet 520 is pushed towards first ratchet 510. The teeth of second ratchet 520 mesh with the teeth of first ratchet 510. Due to the limiting effect of the limiting component, although second ratchet 520 can move along the axis of connecting shaft 240, second ratchet 520 cannot rotate around the axis of connecting shaft 240. At this time, first ratchet 510, which is matched with second ratchet 520, can only rotate in one direction. Therefore, after brush assembly 210 connected to first ratchet 510 rotates through first ratchet 510 and spline drive shaft 230, brush assembly 210 cannot rotate in the opposite direction under the limiting effect of second ratchet 520, thus achieving positioning.

[0060] like Figure 5As shown, in another specific embodiment, the ratchet assembly 500 further includes a pull knob 540. A retaining ring 241 is fixed on the connecting shaft 240. At this time, the compression spring 530 abuts against the retaining ring 241. The retaining ring 241 fixes the compression spring 530, preventing it from disengaging from the connecting shaft 240 during compression. The retaining ring 241 has a through hole. The pull knob 540 is sleeved on the connecting shaft 240 and can move along the axial direction of the connecting shaft 240. One end of the pull knob 540 is fixedly connected to the second ratchet 520 through the through hole in the retaining ring 241, and the other end of the pull knob 540 is provided with a radial... The extended paddle allows the second ratchet 520 to move away from the first ratchet 510 when the rotation direction restriction of the second ratchet 520 on the first ratchet 510 needs to be released. This is achieved by pulling the pull knob 540 until the second ratchet 520 disengages from the first ratchet 510. At this point, the first ratchet 510 and the connected spline drive shaft 230 can rotate in different directions to adjust the position of the brush assembly 210. After adjustment, the pulling force of the pull knob 540 is removed. Under the elastic force of the compression spring 530 between the second ratchet 520 and the blocking ring 241, the second ratchet 520 moves towards the first ratchet 510 until the second ratchet 520 engages with the first ratchet 510.

[0061] like Figure 6 and Figure 7 As shown, in a specific embodiment, the limiting component includes a protrusion 521 disposed on the inner wall of the second ratchet 520 and a sliding groove 242 formed on the connecting shaft 240. The sliding groove 242 extends along the axial direction of the connecting shaft 240. When the second ratchet 520 is sleeved on the connecting shaft 240, the protrusion 521 on the inner wall of the second ratchet 520 is embedded in the sliding groove 242 on the connecting shaft 240. The protrusion 521 and the sliding groove 242 are in clearance fit. The protrusion 521 slides in the sliding groove 242 along the extending direction of the sliding groove 242. Therefore, the protrusion 521 and the sliding groove 242 not only realize the movement of the second ratchet 520 along the axial direction of the connecting shaft 240, but also restrict the rotation of the second ratchet 520 around the axis of the connecting shaft 240 because the protrusion 521 is embedded in the sliding groove 242.

[0062] like Figure 3As shown, in a specific embodiment, the electric field auxiliary device further includes an L-shaped rod 250 and a telescopic rod 260, and the second rotating shaft assembly includes a damping turntable 600. The telescopic rod 260 includes multiple sequentially sleeved sections. One of two adjacent sleeved sections can slide within the inner cavity of the other section. Thus, by sliding each section along its axial direction, the telescopic rod 260 can be extended or shortened. The position of the brush assembly 210 is adjusted by the extension and retraction of the telescopic rod 260. One end of the telescopic rod 260 is connected to the first rotating shaft assembly, and the other end is connected to one end of the L-shaped rod 250. The L-shaped rod 250 is connected to the brush assembly 210 through a damping disc 600. Because the L-shaped rod 250 has a right-angled member, the axis of the damping disc 600 on which the L-shaped rod 250 is mounted is perpendicular to the axis of the first rotating shaft assembly. Therefore, the brush assembly 210 can rotate around two different axes to achieve multi-directional adjustment. Furthermore, by adjusting the resistance of the damping disc 600, the positional stability of the brush assembly 210 is ensured.

[0063] like Figure 11 As shown, in a specific embodiment, the damping disc 600 includes an active rotating disc 610, a driven rotating disc 620, a threaded fixed shaft 630, a limiting screw 640, a damping plate 650, a limiting plate 660, and a locking nut 670. Along the direction from the tail to the head of the threaded fixed shaft 630, the locking nut 670, the limiting plate 660, the damping plate 650, the driven rotating disc 620, and the active rotating disc 610 are sequentially mounted on the threaded fixed shaft 630. Both the active rotating disc 610 and the driven rotating disc 620 can rotate around the axis of the threaded fixed shaft 630, while the active rotating disc 610 is fixed to the brush assembly 210 by the limiting screw 640. The rotating disk 620 is fixedly connected to the L-shaped rod 250 by the limiting screw 640, realizing the rotation between the brush assembly 210 and the L-shaped rod 250. The surface of the damping plate 650 is coated with damping oil. The resistance of the damping turntable 600 can be adjusted by rotating the locking nut 670. The maximum damping of the damping turntable 600 can be 20 N.m. In a specific embodiment, the L-shaped rod 250 and the telescopic rod 260 can also be connected by the damping turntable 600. The relative rotation between the L-shaped rod 250 and the telescopic rod 260 allows the relative angle between the L-shaped rod 250 and the telescopic rod 260 to be adjusted in real time, thereby further increasing the adjustment range of the brush assembly 210 in more directions and angles.

[0064] like Figure 3As shown, multiple telescopic rods 260 are provided, each connected to the first rotating shaft assembly. The multiple telescopic rods 260 not only increase the stability of the brush assembly 210's rotation but also strengthen the structure, making it less prone to damage during rotation. Furthermore, the other ends of each telescopic rod 260 are connected in series by rods, further improving the stability of the connection structure and preventing wobbling during rotation. An L-shaped rod 250 is installed on one of the multiple telescopic rods 260. Additionally, each telescopic rod 260 can be extended or retracted by a motor, providing automation and operational safety to the equipment.

[0065] like Figure 8 As shown, the brush assembly 210 also includes a brush base 212, a torsion spring 213, a rotating shaft 214, and a limiting shaft 215. The flexible conductive brush head 211 is rotatably connected to the brush base 212 via the rotating shaft 214. The torsion spring 213 is sleeved on the rotating shaft 214, and the two protruding ends of the torsion spring 213 are pressed against one side of the flexible conductive brush head 211. The limiting shaft 215 is located on the other side of the flexible conductive brush head 211. The elastic force of the torsion spring 213 causes the flexible conductive brush head 211 to be pressed against the limiting shaft 215. Therefore, during the process of applying current to the steel being transported, the flexible conductive brush head 211 in contact with the steel will rotate in a timely manner according to the different shapes of the steel. Under the elastic force of the torsion spring 213 and the limiting shaft 215 on the other side, the flexible conductive brush head 211 is limited, so that the flexible conductive brush head 211 is tightly attached to the surface of the steel to ensure a stable and continuous current flow.

[0066] In another specific embodiment, such as Figure 9As shown, the flexible conductive brush head 211 also includes a supporting shell 211-1, an inflatable bladder 211-2, a conductive sheet 211-3, and a sliding rod 211-4. The supporting shell 211-1 is a cavity structure with an opening and a sliding groove. The inflatable bladder 211-2 is a cavity structure for containing gas. An inflation nozzle is located at the bottom of the inflatable bladder 211-2, through which gas is filled. The inflatable bladder 211-2 is installed into the inner cavity of the supporting shell 211-1 through the opening, meaning the supporting shell 211-1 is fitted over the outside of the inflatable bladder 211-2. For protection, the conductive sheet 211-3 is a thin, arc-shaped surface. The inflatable bladder 211-2 is located on one side of the opening of the supporting shell 211-1 and has an arc-shaped structure. When the inflatable bladder 211-2 is inflated, one side of the arc-shaped structure of the inflatable bladder 211-2 protrudes away from the supporting shell 211-1, while the conductive sheet 211-3 fits into one side of the arc-shaped structure of the inflatable bladder 211-2. At the same time, sliding rods 211-4 are connected to both ends of the conductive sheet 211-3, and the sliding rods 211-4 are slidably installed in the sliding groove of the supporting shell 211-1. The sliding groove extends along the extension direction of both ends of the conductive sheet 211-3 under pressure. Therefore, when the flexible conductive brush head 211 comes into contact with the plate, the conductive sheet 211-3 is subjected to a compressive force, causing the arc of the curved conductive sheet 211-3 to decrease and change towards a planar state. At the same time, the gas in the inflatable bladder 211-2 is expelled through the air nozzle. At this time, the contact area between the conductive sheet 211-3 and the plate increases, improving the stability of current conduction between the flexible conductive brush head 211 and the plate, thereby improving the reliability of the electrical connection, reducing the risk of poor contact leading to electrical connection interruption, and further enhancing the adaptive electric field-assisted metal provided in this embodiment. The rolling equipment is adaptive. After the flexible conductive brush head 211 separates from the plate, that is, after the conductive sheet 211-3 is no longer under pressure, gas is filled into the air bladder 211-2 through the air inlet. The air bladder 211-2 restores the conductive sheet 211-3 to its initial arc shape. In a specific embodiment, the air bladder 211-2 can be made of rubber material, and the thickness of the conductive sheet 211-3 can be set to 0.2 mm. Alternatively, those skilled in the art can set the thickness of the conductive sheet 211-3 according to actual needs, which will not be elaborated here.

[0067] like Figure 10As shown, the brush assembly 210 also includes a brush switch 216, a main control wire 217, and a sub-control switch wire 218. Each flexible conductive brush head 211 is connected to the main control wire 217 through the sub-control switch wire 218. Each flexible conductive brush head 211 has a brush switch 216 on its conductive line. The brush switch 216 can control the on / off state of the circuit between the sub-control switch wire 218 and the main control wire 217. In this way, the number of flexible conductive brush heads 211 energized can be controlled according to the actual width requirements of the metal plate. This ensures the steel rolling requirements while saving unnecessary power and avoiding energy waste.

[0068] In a specific embodiment, the rolling steps of aluminum alloy sheet using the adaptive electric field assisted metal rolling equipment provided in this embodiment are as follows:

[0069] Step 1: Slab Pretreatment

[0070] The upper and lower surfaces of the slab are cleaned. First, a rotating wire brush is used to grind away the surface oxide scale or micro-defects. Then, 400#, 800#, and 1500# sandpaper are used for further fine grinding. After grinding, acetone is used to remove oil stains, followed by ultrasonic cleaning with anhydrous ethanol, and then drying.

[0071] Step 2: Select the optimal path for the electric field auxiliary device

[0072] Because aluminum alloys typically possess good plasticity and corrosion resistance, multi-pass cold rolling processes are generally used. However, due to the cumulative deformation, work hardening often occurs after rolling. Therefore, an electric field is applied to the surfaces of the upper and lower rolls 120 at the exit of the rolling mill 100. Figure 12 As shown, the aim is to use an energy field to soften the metal in the rolling deformation zone, thereby reducing its flow stress and alleviating post-rolling work hardening. The electric field assist device 200 adjusts the sliding of the slide rail assembly 300, the extension and retraction of the telescopic rod 260, the rotation of the ratchet assembly 500, and the adjustment of the damping turntable 600, so that the flexible conductive brush head 211 of the brush assembly 210 is attached to the surface of the roll 120. Then, according to the width of the aluminum alloy sheet, the brush switch 216 is closed to make the corresponding flexible conductive brush head 211 conductive.

[0073] Step 3: Adjust the current and rolling parameters

[0074] To better reduce residual stress and eliminate work hardening in the rolled sheet, the thermal effect of current is utilized to control the heating temperature to reach the recrystallization temperature of the aluminum alloy. DC pulsed current assisted rolling is selected, with parameters set as follows: voltage 30V, current 100A, frequency 1000Hz, duty cycle 30%, rectangular pulse waveform, and constant current mode. To fully utilize the current during rolling, the rolling speed is set to 0.5mm / s, with a reduction of 15% per pass. The exit sheet temperature is monitored continuously throughout the rolling process using a temperature detector.

[0075] In a specific embodiment, the rolling steps of magnesium alloy sheet using the adaptive electric field assisted metal rolling equipment provided in this embodiment are as follows:

[0076] Step 1: Slab Pretreatment

[0077] The upper and lower surfaces of the slab are cleaned. First, a rotating wire brush is used to grind away the surface oxide scale or micro-defects. Then, 400#, 800#, and 1500# sandpaper are used for further fine grinding. After grinding, acetone is used to remove oil stains, followed by ultrasonic cleaning with anhydrous ethanol, and then drying.

[0078] Step 2: Select the optimal path for the electric field auxiliary device

[0079] Since close-packed hexagonal magnesium alloys are difficult to deform at room temperature, they usually require hot rolling. Therefore, the pre-rolling electric heating effect of the electric field auxiliary device 200 is utilized. The method of applying an electric field auxiliary to the surfaces of the upper and lower plates at the entrance of the roll assembly 100 is selected, such as... Figure 13 As shown. The rapid heating characteristic of the current allows the plate to quickly reach the preset temperature. The thermal and non-thermal effects of the current reduce the deformation resistance of the plate, thereby achieving good deformation and no edge cracks after rolling. The electric field auxiliary device 200 adjusts the sliding of the slide rail assembly 300, the extension and retraction of the telescopic rod 260, the rotation of the ratchet assembly 500, and the adjustment of the damping turntable 600, so that the flexible conductive brush heads 211 of the two sets of brush assemblies 210 are respectively attached to the upper and lower surfaces of the magnesium alloy plate. Then, according to the width of the magnesium alloy plate, the corresponding flexible conductive brush head 211 conducts electricity by setting the closing of the brush switch 216.

[0080] Step 3: Adjust the current and rolling parameters

[0081] Since magnesium alloys are difficult to deform at room temperature, it is necessary to maximize the Joule heating effect and increase the pre-rolling temperature of the sheet metal. Therefore, the electric heating temperature is controlled to reach 400℃. DC pulse current is selected for assisted rolling, with parameters set as follows: voltage 30V, current 300A, frequency 1000Hz, duty cycle 30%, pulse waveform rectangular, and current-steady mode. The current path is perpendicular to the upper surface of the sheet metal, flowing through the lower surface to form a loop. To ensure that the current fully acts on the sheet metal, the rolling speed is set to 0.5mm / s, the reduction per pass is 15%, and the inlet sheet temperature is monitored throughout the rolling process using a temperature detector.

[0082] In a specific embodiment, the rolling steps for a sheet metal with an uneven surface using the adaptive electric field assisted metal rolling equipment provided in this embodiment are as follows:

[0083] Step 1: Slab Pretreatment

[0084] The upper and lower surfaces of the slab are cleaned. First, a rotating wire brush is used to grind away the surface oxide scale or micro-defects. Then, 400#, 800#, and 1500# sandpaper are used for further fine grinding. After grinding, acetone is used to remove oil stains, followed by ultrasonic cleaning with anhydrous ethanol, and then drying.

[0085] Step 2: Select the optimal path for the electric field auxiliary device

[0086] Since the surface of the sheet material is not always a flat, regular rectangle, for sheets with convex surfaces, an electric field-assisted rolling method can be used, where the sheet material is rolled at the inlet or outlet of the rolling mill 100. Figure 14 As shown. The rapid heating characteristic of the current allows the plate to quickly reach the preset temperature, reducing the plate's deformation resistance and thus achieving good deformation and no edge cracks after rolling. The electric field auxiliary device 200 adjusts the sliding of the slide rail assembly 300, the extension and retraction of the telescopic rod 260, the rotation of the ratchet assembly 500, and the adjustment of the damping turntable 600, so that the flexible conductive brush head 211 of the brush assembly 210 fits against the side of the plate.

[0087] Step 3: Adjust the current and rolling parameters

[0088] Appropriate current parameters are selected based on the characteristics of the sheet metal. DC pulse current is used to assist rolling. For difficult-to-deform metals, a current greater than 150A and a duty cycle greater than 20% are typically selected; for metals with good plasticity, a current less than 150A and a duty cycle less than 20% are typically selected. The pulse waveform is rectangular, and the energizing mode is constant current mode. The current path is such that it flows across one side of the sheet metal in the transverse direction and reaches the other side, forming a loop. To ensure that the current fully acts on the sheet metal, the rolling speed is set to 0.5 mm / s, and the reduction per pass is 15%. The temperature of the inlet sheet metal is monitored throughout the rolling process using a temperature detector.

[0089] In another specific embodiment, the rolling steps of the magnesium / aluminum composite sheet using the adaptive electric field assisted metal rolling equipment provided in this embodiment are as follows:

[0090] Step 1: Slab Pretreatment

[0091] The upper and lower surfaces of the slab are cleaned. First, a rotating wire brush is used to grind away the surface oxide scale or micro-defects. Then, 400#, 800#, and 1500# sandpaper are used for further fine grinding. After grinding, acetone is used to remove oil stains, followed by ultrasonic cleaning with anhydrous ethanol. After drying, the magnesium and aluminum plates are assembled face to face with the magnesium plate on top and the aluminum plate on the bottom.

[0092] Step 2: Select the optimal path for the electric field auxiliary device

[0093] Because aluminum alloys possess good plasticity and corrosion resistance, while magnesium alloys are difficult-to-deform metals at room temperature, an electric field auxiliary device 200 is used to energize one side of the magnesium alloy. This is achieved by adjusting the sliding of the slide rail assembly 300, the extension and retraction of the telescopic rod 260, the rotation of the ratchet assembly 500, and the adjustment of the damping turntable 600. One set of flexible conductive brush heads 211 of the electric field auxiliary device 200 contacts the magnesium-aluminum plate surface at the inlet end of the roll assembly 100, while the other set contacts the outlet end of the roll assembly 100, which is in close contact with the roll 120. The electric field assistance is applied as follows: Figure 15 As shown. The rapid heating characteristic of electric current allows the sheet material to quickly reach the preset temperature, reducing its deformation resistance and thus achieving good deformation and no edge cracks after rolling.

[0094] Step 3: Adjust the current and rolling parameters

[0095] Since magnesium-aluminum alloys are difficult to deform at room temperature, it is necessary to maximize the Joule heating effect and increase the pre-rolling temperature of the sheet metal. Therefore, the electric heating temperature is controlled to reach 400℃. DC pulse current is selected for assisted rolling, with parameters set as follows: voltage 30V, current 300A, frequency 1000Hz, duty cycle 30%, rectangular pulse waveform, and constant current mode. The current path is perpendicular to the upper surface of the sheet metal, flowing through the lower surface to form a loop. To ensure that the current fully acts on the sheet metal, the rolling speed is set to 0.5mm / s, the reduction per pass is 15%, and the inlet sheet temperature is monitored throughout the rolling process using a temperature detector.

[0096] like Figure 16 Image (a) shows a magnesium / aluminum composite sheet rolled using the adaptive electric field assisted metal rolling equipment provided in this embodiment. Figure 16Image (b) shows a magnesium / aluminum composite sheet after hot rolling in a heating furnace in the prior art. It can be seen that the magnesium / aluminum composite sheet rolled by the adaptive electric field assisted metal rolling equipment provided in this embodiment has a smooth surface, while the magnesium / aluminum composite material hot-rolled in the prior art suffers from magnesium side cracks, and the heating time is long and the efficiency is low. Meanwhile, the interfacial shear strength of the two sets of magnesium / aluminum composite sheets after rolling was tested using a universal testing machine. Figure 17 As shown, the interfacial shear strength of the magnesium / aluminum composite plate rolled by the adaptive electric field assisted metal rolling equipment provided in this embodiment is increased from 33MPa to 70MPa, while the elongation is increased from 15% to 27%. This demonstrates that the adaptive electric field assisted metal rolling equipment provided in this embodiment has a good control effect on the mechanical properties and macroscopic morphology of the plate.

[0097] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adaptive electric field-assisted metal rolling device, characterized in that, include: A rolling mill assembly includes a mill stand and two rolling mill rolls arranged vertically, the two rolling mill rolls being rotatably mounted on the mill stand about their own axes; An electric field assist device includes a brush assembly, a first rotating shaft assembly, a second rotating shaft assembly, and a locking assembly. The brush assembly includes a plurality of flexible conductive brush heads arranged in sequence. The brush assembly is movable along the axial direction of the roll. The brush assembly is connected to the first rotating shaft assembly through the second rotating shaft assembly, and the brush assembly is rotatable around the axes of the first rotating shaft assembly and the second rotating shaft assembly, respectively. The axis of the first rotating shaft assembly is perpendicular to the axis of the second rotating shaft assembly and parallel to the axis of the roll. After the relative position of the brush assembly and the roll is adjusted, the locking assembly limits and fixes the brush assembly. The electric field auxiliary device also includes a base, and the locking assembly also includes a ratchet assembly and a limiting assembly. The ratchet assembly includes a first ratchet, a second ratchet, and a compression spring. The first rotating shaft assembly includes a spline drive shaft and a connecting shaft. The axis of the spline drive shaft and the axis of the connecting shaft are located on the same axis and are parallel to the axis of the roll. The first ratchet is fixedly connected to the spline drive shaft, the spline drive shaft is rotatably connected to the base around its own axis, and the brush assembly is connected to the spline drive shaft; The second ratchet is sleeved on the connecting shaft and can move along the axial direction of the connecting shaft. The compression spring is sleeved on the connecting shaft, with its first end abutting against the second ratchet and its second end limited to the connecting shaft. Through the elastic force of the compression spring, the second ratchet moves and engages with the first ratchet. The limiting component is used to restrict the rotation of the second ratchet around the axis of the connecting shaft. The ratchet assembly also includes a pull knob, a blocking ring is fixed on the connecting shaft, the second end of the compression spring abuts against the blocking ring, and the blocking ring has a through hole; The pull knob is sleeved on the connecting shaft. The pull knob can move along the axial direction of the connecting shaft. One end of the pull knob passes through the through hole and is fixedly connected to the second ratchet. The other end of the pull knob is fixed with a paddle so that the second ratchet can be pulled away from the first ratchet by the pull knob. The limiting component includes a protrusion disposed on the inner wall of the second ratchet and a sliding groove formed on the connecting shaft. The sliding groove extends along the axial direction of the connecting shaft, and the protrusion is slidably embedded in the sliding groove. The electric field auxiliary device further includes an L-shaped rod and a telescopic rod. The second rotating shaft assembly includes a damping disc. The telescopic rod includes a plurality of sequentially sleeved sections. The length of the telescopic rod is adjusted by extending and retracting the sections along the axial direction of the telescopic rod. One end of the telescopic rod is connected to the first rotating shaft assembly, and the other end of the telescopic rod is connected to one end of the L-shaped rod. The other end of the L-shaped rod is connected to the brush assembly through the damping disc. The axis of the damping disc is arranged perpendicular to the axis of the first rotating shaft assembly through the L-shaped rod. The flexible conductive brush head includes a supporting shell, an air bladder, a conductive sheet, and a sliding rod. The air bladder is provided with an air nozzle for inflating the inner cavity. The supporting shell has an opening and a sliding groove that slides with the sliding rod. The supporting shell is sleeved on the outside of the inflatable bladder. The conductive sheet and the inflatable bladder are both arc-shaped structures for fitting together on the side of the opening of the supporting shell. The two ends of the conductive sheet are connected to the sliding groove through the sliding rod. The sliding groove extends along the extension direction of the conductive sheet.

2. The adaptive electric field assisted metal rolling equipment according to claim 1, characterized in that, The adaptive electric field assisted metal rolling equipment includes a slide rail assembly, which includes a guide rail and a guide rail slider slidably connected to the guide rail. The guide rail is disposed on the mill stand and extends along the axial direction of the roll. The brush assembly is connected to the guide rail slider.

3. The adaptive electric field assisted metal rolling equipment according to claim 2, characterized in that, The locking assembly includes a knob locking nut, which is disposed on the guide rail slider. The guide rail slider on the guide rail is limited and fixed by rotating the knob locking nut.

4. The adaptive electric field assisted metal rolling equipment according to claim 1, characterized in that, Multiple telescopic rods are provided, each of which is connected to the first rotating shaft assembly, and the telescopic rods are connected in series and fixedly connected. The L-shaped rod is connected to one of the multiple telescopic rods.

5. The adaptive electric field assisted metal rolling equipment according to claim 1, characterized in that, The brush assembly also includes a brush base, a torsion spring, a rotating shaft, and a limiting shaft; The flexible conductive brush head is rotatably connected to the brush base via the rotating shaft. The torsion spring is sleeved on the rotating shaft, and the extended end of the torsion spring abuts against one side of the flexible conductive brush head. The limiting shaft is located on the other side of the flexible conductive brush head, so that the flexible conductive brush head abuts against the limiting shaft by the elastic force of the torsion spring.

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