New energy battery pole piece punching and cutting integrated mold

Abstract

The technical scheme discloses a kind of integrated mould of new energy battery pole piece punching four out of one, including the upper die assembly and lower die assembly of opposite arrangement, the multiple punching stations of being arranged in 2×2 matrix are correspondingly provided in the lower die assembly, each punching station is respectively provided with the floating lower die piece capable of moving along the opening and closing direction of mould.The multiple suspension support assemblies are provided below the floating lower die piece, the suspension support assembly includes cavity, piston and liquid storage cavity, the magnetorheological fluid is filled in the liquid storage cavity;Multiple liquid storage cavities are connected by communication liquid path, and are provided with magnetic control narrow flow channel and excitation assembly, the magnetic field intensity is changed to adjust the flow resistance of magnetorheological fluid, to realize the dynamic control of floating lower die piece movement damping.The communication liquid path connection compensation cavity is used to compensate the volume change in the flow process of magnetorheological fluid, through multi-station floating support and adjustable damping structure, reduce the stress difference of each station in the process of four out of one punching, improve the stability and consistency of finished product in pole piece punching process.

Description

Technical Field

[0001] This invention belongs to the field of mechanical processing technology, specifically, it relates to an integrated mold for punching four electrode sheets in a single pass for new energy batteries. Background Technology

[0002] With the development of the new energy vehicle industry, higher requirements have been placed on the processing precision and production efficiency of power batteries for electrode sheets. As an important component inside the battery, the dimensional accuracy and edge punching quality of the electrode sheets directly affect the subsequent cell assembly process and battery performance. Currently, electrode sheet processing typically uses punching dies, where the upper die blade and the lower die structure work together to punch and shape continuous strip or sheet electrode materials.

[0003] To improve production efficiency, existing technologies are increasingly adopting multi-station synchronous punching structures, enabling dies to form multiple electrode sheets simultaneously in a single punching process. Among these, a four-stage punching die can achieve simultaneous processing of four electrode sheets by setting multiple punching zones. However, in actual punching processes, because multiple stations are simultaneously subjected to large instantaneous impact loads, the forces acting on each station may differ due to factors such as material condition, blade wear, and installation errors. This leads to inconsistent punching effects at different stations, easily causing problems such as burrs and edge tearing on some electrode sheets.

[0004] A review of relevant publicly available technologies reveals several key technologies. CN209255587U proposes an integrated, self-opening high-speed lithium battery electrode punching die. This die, with its upper and lower mold bases, cutting blade, and pressure plate, enables high-speed punching of lithium battery electrodes and utilizes a guiding structure to improve mold stability. US20190351748A1 presents a battery electrode punching device, employing a punching tool, support structure, and positioning mechanism to achieve precision cutting of battery electrode materials. WO2021188655A1 discloses a punching equipment for battery electrode manufacturing, optimizing the punching components and material conveying structure to improve positioning accuracy and production efficiency during electrode processing.

[0005] The above technical solutions all propose several technical solutions to improve the quality of the punching process, but for multiple output directions with one output and four outputs, there are currently few related technical routes proposed.

[0006] The foregoing description of the background art is intended only to facilitate understanding of the invention. This description does not endorse or acknowledge any common general knowledge in the materials mentioned. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated mold for punching four electrodes in a single pass for new energy batteries. The mold includes an upper mold assembly and a lower mold assembly arranged opposite each other. The lower mold assembly has multiple punching stations arranged in a 2×2 matrix. Each punching station has a floating lower mold component that can move along the mold's opening and closing direction. Multiple suspension support assemblies are located below the floating lower mold components. Each suspension support assembly includes a cavity, a piston, and a liquid storage cavity filled with magnetorheological fluid. The multiple liquid storage cavities are connected by a connecting liquid path and are equipped with a magnetically controlled narrow flow channel and an excitation assembly. By changing the magnetic field strength, the flow resistance of the magnetorheological fluid is adjusted to achieve dynamic control of the motion damping of the floating lower mold components. The connecting liquid path connects to a compensation cavity to compensate for volume changes during the flow of the magnetorheological fluid. Through the multi-station floating support and adjustable damping structure, the force differences at each station during the single-pass four-electrode punching process are reduced, improving the stability of the electrode punching process and the consistency of the finished product.

[0008] The present invention adopts the following technical solution: an integrated mold for punching four electrode sheets of a new energy battery, the integrated mold including an upper mold assembly (100) and a lower mold assembly (200) arranged opposite to each other, the upper mold assembly (100) being able to reciprocate relative to the lower mold assembly (200) along the mold opening and closing direction; The upper die assembly (100) includes an upper die base (101), an upper die body (102), an upper die blade (103), a pressure plate (104), and an elastic support member (105). The upper die blade (103) is provided with multiple punching areas, and the pressure plate (104) is disposed inside the punching areas formed by the upper die blade (103). The lower die assembly (200) is provided with four punching stations arranged in a 2×2 matrix corresponding to the multiple punching areas. Each punching station is provided with a floating lower die (201). The floating lower die (201) is installed in the guide space formed by the corresponding side wall (202) and can generate displacement within a preset range along the opening and closing direction of the die. Multiple suspension support assemblies are provided below the floating lower module (201). Each suspension support assembly includes a cavity (203), a piston (205) disposed in the cavity (203), and a liquid storage cavity (206) formed below the piston (205). The liquid storage cavity (206) is filled with magnetorheological fluid. Multiple liquid storage chambers (206) within the same punching station are interconnected through a connecting liquid passage (204). A magnetically controlled narrow flow channel (207) is provided in the connecting liquid passage (204). An excitation component (209) for changing the flow resistance of the magnetorheological fluid is provided around the magnetically controlled narrow flow channel (207). The excitation component (209) changes the motion damping of the floating lower module (201) by adjusting the magnetic field strength acting on the magnetorheological fluid. The connecting liquid passage (204) is connected to the compensation chamber (210) to compensate for the volume change caused by the magnetorheological fluid flowing between the storage chamber (206) and the connecting liquid passage (204); A push rod (208) is provided below the floating lower mold (201), and the push rod (208) is used to lift the floating lower mold (201) to a preset position after punching is completed.

[0009] Preferably, a sliding fit clearance is formed between the floating lower die (201) and the side wall (202), and the side wall (202) is used to limit the displacement of the floating lower die (201) in the horizontal direction and to limit the floating lower die (201) from tilting during the punching process; the inner side of the side wall (202) is provided with at least one of a wear-resistant guide layer, a guide bushing or a lubrication structure to reduce the frictional resistance of the floating lower die (201) during the reciprocating motion.

[0010] Preferably, at least two suspension support assemblies are provided below each of the floating lower modules (201), and a plurality of the suspension support assemblies are distributed along the bearing area of ​​the floating lower module (201); The position of the suspension support assembly is determined according to the structural dimensions, punching area distribution and punching load distribution of the floating lower module (201), so that multiple suspension support assemblies can jointly support the floating lower module (201) and reduce local load concentration.

[0011] Preferably, the magnetically controlled narrow flow channel (207) is disposed between the connecting liquid passage (204) and the compensation cavity (210), and the flow cross-sectional area of ​​the magnetically controlled narrow flow channel (207) is smaller than the other flow areas of the connecting liquid passage (204); The excitation assembly (209) includes an electromagnetic coil and a magnetic conductor disposed around or inside the electromagnetic coil. The magnetic field generated by the excitation assembly (209) passes through the magnetically controlled narrow flow channel (207) to change the flow resistance of the magnetorheological fluid when it passes through the magnetically controlled narrow flow channel (207).

[0012] Preferably, the compensation cavity (210) is provided with at least one of an elastic diaphragm, a floating piston, or an elastic bladder to separate the magnetorheological fluid from the compensation space. When the floating lower module (201) is subjected to a punching load and moves downward, the piston (205) compresses the magnetorheological fluid in the reservoir (206), causing the magnetorheological fluid to flow into the compensation cavity (210) through the connecting liquid passage (204), and causing the compensation cavity (210) to generate a corresponding elastic restoring force.

[0013] Preferably, the push rod is positioned below the floating lower mold (201) and moves along the mold opening and closing direction; During the punching process, the upper end of the push rod maintains a preset distance from the floating lower die (201), so that the movement of the floating lower die (201) is buffered by the suspension support assembly; After punching is completed, the push rod moves upward and contacts the floating lower mold (201) to push the floating lower mold (201) back to the initial support position.

[0014] Preferably, each of the punching stations is provided with an independent magnetorheological fluid circuit and a corresponding excitation component (209), and each of the excitation components (209) can adjust the magnetic field strength of the magnetically controlled narrow flow channel (207) in the corresponding punching station. By changing the output state of the excitation components (209) corresponding to different punching stations, the floating lower modules (201) of different punching stations can obtain the same or different motion damping.

[0015] The beneficial effects achieved by this invention are: 1. This technical solution sets up floating lower molds and suspension support components under four punching stations, so that the punching loads of multiple stations can be distributed and transmitted, reducing the instantaneous impact load on the local structure.

[0016] 2. This technical solution can adjust the flow resistance of the magnetorheological fluid by changing the magnetic field strength acting on it, thereby changing the motion damping of the floating lower die during the punching process. This allows the lower die structure to adapt to load changes in different punching stages and reduces defects such as electrode burrs and tears caused by excessive impact.

[0017] 3. This technical solution independently sets up magnetorheological fluid circuits and excitation components for each punching station, enabling independent damping adjustment at different stations according to the actual stress state. This reduces punching differences between stations caused by material variations, blade wear, or assembly errors, and improves the dimensional consistency and processing stability among the four pole pieces. Simultaneously, the compensation cavity and ejector pin structure achieve pressure compensation in the magnetorheological fluid circuit and rapid reset of the floating lower mold, improving the reliability of continuous mold operation. Attached Figure Description

[0018] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0019] Reference numerals: 10-Raw material plate; 20-Cutting line; 100-Upper mold assembly; 101-Upper mold base; 102-Upper mold body; 103-Upper mold blade; 104-Pressure plate; 105-Elastic support component; 200-Lower mold assembly; 201-Floating lower mold component; 202-Side wall; 203-Cavity; 204-Connecting fluid passage; 205-Piston; 206-Reservoir cavity; 207-Magnetically controlled narrow flow channel; 209-Excitation assembly; 210-Compensation cavity; 211-Lower mold base; 220-Merge channel; 500-Computer system; 502-Bus; 504-Processor; 506-Main memory; 508-Read-only memory; 510-Storage device; 512-Display; 514-Input device; 516-Cursor control device; 518-Network device; Figure 1 This is a schematic diagram showing the distribution of the four punching stations of the integrated mold in an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper mold assembly described in an embodiment of the present invention; Figure 3 This is a schematic diagram of the lower mold assembly described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the magnetorheological fluid circuit in an embodiment of the present invention; Figure 5 This is a schematic diagram of the computer system architecture used to control the integrated mold process in an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Other systems, methods, and / or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. All such additional systems, methods, features, and advantages are intended to be included within this specification, within the scope of the invention, and protected by the appended claims. Further features of the disclosed embodiments are described in the following detailed description, and these features will become apparent from the following detailed description.

[0021] In the accompanying drawings of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 component referred to must have a specific orientation. Because the invention is constructed and operated in a specific orientation, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] Example 1: For example, an integrated mold for punching four electrodes of a new energy battery, the integrated mold includes an upper mold assembly (100) and a lower mold assembly (200) arranged opposite to each other, the upper mold assembly (100) being able to reciprocate relative to the lower mold assembly (200) along the mold opening and closing direction; The upper die assembly (100) includes an upper die base (101), an upper die body (102), an upper die blade (103), a pressure plate (104), and an elastic support member (105). The upper die blade (103) is provided with multiple punching areas, and the pressure plate (104) is disposed inside the punching areas formed by the upper die blade (103). The lower die assembly (200) is provided with four punching stations arranged in a 2×2 matrix corresponding to the multiple punching areas. Each punching station is provided with a floating lower die (201). The floating lower die (201) is installed in the guide space formed by the corresponding side wall (202) and can generate displacement within a preset range along the opening and closing direction of the die. Multiple suspension support assemblies are provided below the floating lower module (201). Each suspension support assembly includes a cavity (203), a piston (205) disposed in the cavity (203), and a liquid storage cavity (206) formed below the piston (205). The liquid storage cavity (206) is filled with magnetorheological fluid. Multiple liquid storage chambers (206) within the same punching station are interconnected through a connecting liquid passage (204). A magnetically controlled narrow flow channel (207) is provided in the connecting liquid passage (204). An excitation component (209) for changing the flow resistance of the magnetorheological fluid is provided around the magnetically controlled narrow flow channel (207). The excitation component (209) changes the motion damping of the floating lower module (201) by adjusting the magnetic field strength acting on the magnetorheological fluid. The connecting liquid passage (204) is connected to the compensation chamber (210) to compensate for the volume change caused by the magnetorheological fluid flowing between the storage chamber (206) and the connecting liquid passage (204); A push rod (208) is provided below the floating lower mold (201), and the push rod (208) is used to lift the floating lower mold (201) to a preset position after punching is completed.

[0023] Preferably, a sliding fit clearance is formed between the floating lower die (201) and the side wall (202), and the side wall (202) is used to limit the displacement of the floating lower die (201) in the horizontal direction and to limit the floating lower die (201) from tilting during the punching process; the inner side of the side wall (202) is provided with at least one of a wear-resistant guide layer, a guide bushing or a lubrication structure to reduce the frictional resistance of the floating lower die (201) during the reciprocating motion.

[0024] Preferably, at least two suspension support assemblies are provided below each of the floating lower modules (201), and a plurality of the suspension support assemblies are distributed along the bearing area of ​​the floating lower module (201); The position of the suspension support assembly is determined according to the structural dimensions, punching area distribution and punching load distribution of the floating lower module (201), so that multiple suspension support assemblies can jointly support the floating lower module (201) and reduce local load concentration.

[0025] Preferably, the magnetically controlled narrow flow channel (207) is disposed between the connecting liquid passage (204) and the compensation cavity (210), and the flow cross-sectional area of ​​the magnetically controlled narrow flow channel (207) is smaller than the other flow areas of the connecting liquid passage (204); The excitation assembly (209) includes an electromagnetic coil and a magnetic conductor disposed around or inside the electromagnetic coil. The magnetic field generated by the excitation assembly (209) passes through the magnetically controlled narrow flow channel (207) to change the flow resistance of the magnetorheological fluid when it passes through the magnetically controlled narrow flow channel (207).

[0026] Preferably, the compensation cavity (210) is provided with at least one of an elastic diaphragm, a floating piston, or an elastic bladder to separate the magnetorheological fluid from the compensation space. When the floating lower module (201) is subjected to a punching load and moves downward, the piston (205) compresses the magnetorheological fluid in the reservoir (206), causing the magnetorheological fluid to flow into the compensation cavity (210) through the connecting liquid passage (204), and causing the compensation cavity (210) to generate a corresponding elastic restoring force.

[0027] Preferably, the push rod is positioned below the floating lower mold (201) and moves along the mold opening and closing direction; During the punching process, the upper end of the push rod maintains a preset distance from the floating lower die (201), so that the movement of the floating lower die (201) is buffered by the suspension support assembly; After punching is completed, the push rod moves upward and contacts the floating lower mold (201) to push the floating lower mold (201) back to the initial support position.

[0028] Preferably, each of the punching stations is provided with an independent magnetorheological fluid circuit and a corresponding excitation component (209), and each of the excitation components (209) can adjust the magnetic field strength of the magnetically controlled narrow flow channel (207) in the corresponding punching station. By changing the output state of the excitation components (209) corresponding to different punching stations, the floating lower modules (201) of different punching stations can obtain the same or different motion damping.

[0029] As attached Figure 1 As shown, this embodiment provides an integrated die for punching four finished electrode sheets in a single punching stroke of the upper die assembly on a raw material plate. The integrated die has four punching stations arranged in a 2×2 matrix: station A, station B, station C, and station D. Each station is equipped with a floating lower die, a suspension support structure, and a push rod structure to buffer the punching load and eject the finished electrode sheets. The four punching stations share an upper die base and a lower die base, but each punching station has an independent floating lower die, a suspension support assembly, and a magnetorheological fluid circuit.

[0030] Furthermore, the integrated mold includes an upper mold assembly 100 and a lower mold assembly 200.

[0031] For example, see attached Figure 2 As shown, only the positions of station A and station B are used as examples to illustrate one exemplary structure of the upper die assembly. As shown, the upper die assembly 100 is disposed above the integrated mold and is used to move downwards during the punching process, cooperating with the lower die assembly to complete the punching and forming of the new energy battery electrode sheet. The upper die assembly 100 includes an upper die base 101, an upper die body 102, an upper die blade 103, a pressure plate 104, and an elastic support member 105.

[0032] The upper die base 101 serves as the mounting base for the upper die assembly 100 and is used to connect with the drive mechanism of the stamping equipment to drive the entire upper die assembly 100 to reciprocate along the die opening and closing direction. The upper die body 102 is fixedly disposed below the upper die base 101 and has multiple stamping structure mounting areas corresponding to the positions of multiple stamping stations to achieve synchronous stamping of multiple electrode stations.

[0033] The punching structure includes an upper die blade 103, which is disposed at the position of each punching station on the upper die body 102. The upper die blade 103 forms a closed cutting edge along the preset electrode outline, which is used to cut the raw material plate 10 located between the upper die assembly 100 and the lower die assembly when the upper die assembly 100 moves downward, so that the raw material plate 10 is separated along the predetermined cutting trajectory to form finished electrode and waste.

[0034] The pressure plate 104 is disposed inside the punching area formed by the upper die blade 103 and can move within a certain range relative to the upper die body 102. The pressure plate 104 is used to pre-abut against the raw material plate 10 during the punching process to press and position the raw material plate 10, so as to reduce the offset, warping or local deformation of the raw material plate 10 during the punching process.

[0035] The elastic support member 105 is disposed between the pressure plate 104 and the upper die body 102, and is used to provide elastic support force to the pressure plate 104, so that the pressure plate 104 can generate buffer displacement during the descent of the upper die assembly 100, and return to its initial position after punching. Through the cooperation of the elastic support member 105 and the pressure plate 104, the upper die assembly 100 can stably press the raw material plate 10 while completing the punching action, thereby improving the synchronization and punching accuracy between multiple punching stations.

[0036] For example, the upper die assembly 100 is provided with corresponding punching structures for stations A, B, C, and D, respectively. The punching structures are arranged at a preset interval to accommodate the punching layout of four electrode sheets. Through the above-mentioned structural cooperation, the upper die assembly 100 enables multiple electrode sheets to be pressed and punched sequentially in one die closing process, and simultaneously form four finished electrode sheets.

[0037] Further details are attached. Figure 3 The diagram shows an exemplary structural schematic of the lower die assembly 200. The lower die assembly 200 is disposed below the upper die assembly 100 and is positioned opposite to the upper die assembly 100 along the mold opening and closing direction. The lower die assembly 200 has four lower die punching structures corresponding to stations A, B, C, and D. The four lower die punching structures are arranged in a 2×2 matrix. Each station simultaneously supports the raw material plate 10, and each station cooperates with the corresponding upper die blade 103 to complete the punching and forming of one finished electrode sheet, thereby forming four finished electrode sheets in one downward stroke of the upper die assembly 100.

[0038] The lower die assembly 200 includes a lower die base 211, and floating lower die components 201 respectively disposed at four workstations, sidewalls 202 surrounding the floating lower die components 201, a suspension support assembly, a magnetorheological damping assembly, and a push rod assembly. The lower die base 211 is used to support the various components in the lower die assembly 200 and is connected to the worktable of the stamping equipment.

[0039] For example, the sidewall 202 is arranged around the corresponding floating lower die 201 and extends upward from the lower die base 211 to form a guide space for accommodating the floating lower die 201. The inner surface of the sidewall 202 is arranged opposite to the outer peripheral surface of the floating lower die 201, and a small clearance sliding fit is formed between them, allowing the floating lower die 201 to move up and down along the die opening and closing direction, while restricting the floating lower die 201 from shifting in the horizontal direction. Since the floating lower die 201 may be subjected to instantaneous loads at different positions during the punching process, the sidewall 202 is also used to suppress the floating lower die 201 from deflecting around the horizontal axis, so as to maintain the relative posture between its supporting working surface and the raw material plate 10.

[0040] Preferably, the inner side of the sidewall 202 may be provided with a wear-resistant guide layer, guide bushing, or replaceable guide strip to reduce frictional wear generated during the reciprocating motion of the floating lower mold 201. A lubrication groove may also be provided between the sidewall 202 and the floating lower mold 201 to accommodate the lubricating medium and maintain the lubrication state of the sliding mating surfaces. A dustproof component or dust scraper may be provided near the upper end of the sidewall 202 to prevent metal shavings and coating dust generated during electrode punching from entering the sliding mating gap. Through the above-mentioned guiding and limiting structures, the floating lower mold 201 can move stably in a predetermined direction, reducing jamming and attitude changes caused by off-center loading, dust accumulation, or wear of the mating surfaces.

[0041] For example, the upper surface of the supporting working surface of the floating lower die 201 forms a lower die punch that cooperates with the upper die blade 103, and a preset punching gap is formed between the outer peripheral edge of the lower die punch and the upper die blade 103; when the upper die assembly 100 moves down, the upper die blade 103 punches the raw material plate 10 along the outer peripheral edge of the lower die punch.

[0042] Preferably, multiple suspension support assemblies are disposed below the floating lower module 201, and the suspension support assemblies collectively bear the punching load transmitted by the floating lower module 201. The magnetorheological damping assembly is connected to the suspension support assembly and is used to adjust the damping of the floating lower module 201 during downward movement and unloading rebound by changing the flow resistance of the magnetorheological fluid. The push rod assembly (not shown) is disposed below the floating lower module 201 and maintains a distance from the floating lower module 201 in the normal supporting state to avoid interfering with the buffering action of the suspension support assembly; after punching is completed, the push rod assembly can push the floating lower module 201 upward to restore it to the preset supporting position.

[0043] For example, a suspension support assembly is provided below the floating lower mold 201. In one embodiment, there may be four suspension support assemblies as shown in the figure; in more embodiments, the number of suspension support assemblies may be two, three, five or more. Each of the suspension support assemblies is respectively arranged corresponding to a different area of ​​the floating lower mold 201, and is used to jointly bear the loads of the floating lower mold 201 and the raw material plate 10 above it during the punching process. Preferably, the arrangement position of the suspension support assembly can be determined according to the size parameters of the floating lower mold 201, the distribution of the punching area and the distribution of the applied load, so that each suspension support assembly corresponds to the stress area of ​​the floating lower mold 201 and reduces the local deformation of the floating lower mold 201 during the punching process.

[0044] For example, each of the aforementioned suspension support components includes a cavity 203 and a piston 205. The magnetorheological damping assembly includes a reservoir 206, a connecting fluid passage 204, a magnetically controlled narrow flow channel 207, an excitation component 209, and a compensation cavity 210. The reservoir 206, connecting fluid passage 204, magnetically controlled narrow flow channel 207, and compensation cavity 210 together form a magnetorheological fluid circuit. The cavity 203 is disposed inside the lower mold base 211 and located below the floating lower mold 201. The cavity 203 extends vertically to form a piston mounting space. The piston 205 is slidably disposed inside the cavity 203, and the upper end of the piston 205 abuts against the lower surface of the floating lower mold 201, for transmitting the shearing force received by the floating lower mold 201 to the damping fluid in the reservoir 206. A sealing structure is provided between the piston 205 and the cavity 203 to prevent the damping fluid in the reservoir 206 from leaking and to ensure that the piston 205 can move stably back and forth in the cavity 203.

[0045] For example, the liquid storage cavity 206 is formed between the piston 205 and the bottom of the cavity 203. The liquid storage cavity 206 is filled with damping fluid, preferably a magnetorheological fluid. When the upper die blade 103 moves downward and applies a punching load to the raw material plate 10, the floating lower die 201 is subjected to a downward force, which drives the piston 205 to move downward along the cavity 203, causing a change in the effective volume of the liquid storage cavity 206 and generating flow of the damping fluid within the liquid storage cavity 206. Due to the flow resistance of the damping fluid, the movement speed of the piston 205 is limited, thereby enabling the floating lower die 201 to form a controlled buffer displacement. Through the combined action of multiple suspended support components, the instantaneous impact load borne by a single support position can be reduced, improving the load-bearing stability of the floating lower die 201 during multi-station synchronous punching processes.

[0046] For example, the magnetorheological fluid may include a carrier fluid, magnetic particles dispersed in the carrier fluid, and functional additives for improving dispersion stability, anti-settling properties, and wear resistance. The carrier fluid may be silicone oil, mineral oil, or a synthetic hydrocarbon base fluid, and the magnetic particles may be carbonyl iron powder, ferromagnetic alloy particles, or other magnetically responsive particles capable of directional alignment under a magnetic field. The magnetorheological fluid has a predetermined basic fluidity when no magnetic field is applied, allowing it to flow between the reservoir 206 and the corresponding fluid path as the piston 205 moves. When an external magnetic field is applied to the magnetorheological fluid, the magnetic particles form chain-like or columnar structures along the magnetic field lines, increasing the yield stress and apparent flow resistance of the magnetorheological fluid, thereby increasing the damping effect experienced by the piston 205 during movement. By changing the magnitude of the excitation current, the magnetic field strength acting on the magnetorheological fluid can be altered, thereby adjusting the sinking speed, buffer stroke, and rebound speed of the floating lower module 201 after unloading. Preferably, to ensure long-term stability, the magnetorheological fluid preferably has a low settling rate, a wide operating temperature range, and material compatibility with the cavity 203, piston 205, and sealing structure.

[0047] For example, see attached Figure 4As shown, the liquid storage chambers 206 of each of the suspension support components are interconnected through a connecting liquid passage 204, so that multiple liquid storage chambers 206 at the same station form an interconnected liquid circuit. Specifically, each liquid storage chamber 206 is provided with a liquid passage interface, and each liquid passage interface is connected to a manifold channel 220 through a branch. The manifold channel 220 can be located inside the lower mold base 211 or formed in a liquid passage integrated block installed below the lower mold base 211. To reduce the difference in basic flow resistance between the suspension support components due to the different flow channel lengths, each branch preferably has the same or approximately the same equivalent flow resistance. The equivalent flow resistance can be set by adjusting the flow cross-sectional area, extension length, or local throttling structure of the branch, so that the magnetorheological fluid in the multiple liquid storage chambers 206 can flow into the manifold channel 220 according to a predetermined flow resistance relationship. Preferably, workstations A, B, C, and D are each provided with independent interconnecting hydraulic circuits 204 to prevent hydraulic changes in one workstation from directly affecting other workstations.

[0048] For example, a magnetically controlled narrow flow channel 207 is provided in the connecting liquid passage 204. The flow cross-sectional area of ​​the magnetically controlled narrow flow channel 207 is smaller than that of other liquid passage sections connected to it, so that the magnetorheological fluid forms concentrated flow resistance when flowing through this position. The magnetically controlled narrow flow channel 207 can be formed by an annular gap flow channel, a parallel slit flow channel, a through-type throttling orifice, or by multiple spaced micro-flow channels. Preferably, the magnetically controlled narrow flow channel 207 is located between the confluence channel 220 and the compensation chamber 210, so that the magnetorheological fluid discharged from multiple liquid storage chambers 206 passes through the magnetically controlled narrow flow channel 207 before entering the compensation chamber 210, thereby uniformly adjusting the damping state of multiple suspension support components at the same working position through a single magnetically controlled position.

[0049] The compensation chamber 210 is connected to the downstream end of the magnetically controlled narrow flow channel 207, and is used to receive the magnetorheological fluid discharged from each reservoir 206 during the downward movement of the piston 205, and to provide space for volume change of the magnetorheological fluid. An elastic diaphragm, a floating piston, or an elastic bladder may be installed inside the compensation chamber 210 to isolate the magnetorheological fluid from the compressible gas or elastic reset space. When the floating lower module 201 is pressed down and drives the piston 205 to compress the reservoir 206, the magnetorheological fluid enters the compensation chamber 210 through the connecting liquid passage 204 and the magnetically controlled narrow flow channel 207, causing the elastic diaphragm to deform, the floating piston to move, or the elastic bladder to be compressed. When the shear load is released, the reset force formed in the compensation chamber 210 pushes the magnetorheological fluid back to each reservoir 206 to assist the piston 205 and the floating lower module 201 in returning to their initial positions. The compensation chamber 210 can also be used to absorb instantaneous pressure fluctuations in the liquid circuit and compensate for volume changes in the magnetorheological fluid caused by temperature changes, thereby reducing the possibility of excessive pressure, cavitation, or insufficient liquid supply inside the liquid circuit.

[0050] For example, an excitation assembly 209 is provided around the periphery of the magnetically controlled narrow flow channel 207. The excitation assembly 209 includes an electromagnetic coil, a magnetic conductor, and a coil mounting base for fixing the electromagnetic coil. The magnetic conductor forms a magnetic circuit around the magnetically controlled narrow flow channel 207, allowing the generated magnetic lines of force to pass through the flow area of ​​the magnetorheological fluid. The wall of the magnetically controlled narrow flow channel 207 may include a non-magnetically conductive isolation section to reduce the diffusion of the magnetic field along the lower mold base 211 and the formation of a magnetic circuit bypass. The excitation assembly 209 is electrically connected to an external power supply unit, which changes the magnetic field strength within the magnetically controlled narrow flow channel 207 by altering the magnitude of the current applied to the electromagnetic coil, the energizing duration, or the pulse duty cycle. When the current in the electromagnetic coil increases, the magnetic field acting on the magnetorheological fluid strengthens, and the magnetic particles form a more stable chain-like arrangement within the narrow flow channel, increasing the flow resistance of the magnetorheological fluid. When the current in the electromagnetic coil decreases, the chain-like arrangement of the magnetic particles weakens, and the flow resistance of the magnetorheological fluid decreases accordingly.

[0051] Before the upper mold assembly 100 contacts the raw material plate 10, the excitation assembly 209 can remain de-energized or output a low excitation current. On the one hand, this allows the magnetorheological fluid to maintain low flow resistance, thereby reducing the additional resistance of the suspension support assembly in its initial supporting state; on the other hand, it allows the pre-pressure provided by the compensation chamber 210 to act on each reservoir chamber 206, keeping the piston 205 and the floating lower mold 201 in a preset initial position. When the pressure plate 104 begins to contact and press against the raw material plate 10, the excitation current can be appropriately increased to give the floating lower mold 201 moderate damping, reducing rapid sinking and vibration caused by pressure contact. When the upper die blade 103 begins to cut into the raw material plate 10 and the punching load enters the rising stage, the magnetic field strength generated by the excitation component 209 is further increased to limit the magnetorheological fluid from rapidly passing through the magnetically controlled narrow flow channel 207, thereby increasing the resistance encountered by the piston 205 when it moves downward, so that the floating lower die 201 maintains high transient support stability during the material fracture stage, and reduces the tearing of the cut, increased burrs, or coating peeling caused by the lower die working surface retreating too quickly.

[0052] After the raw material plate 10 breaks and the punching load drops rapidly, the excitation assembly 209 can maintain a moderate magnetic field strength for a predetermined time to suppress the rapid rebound of the floating lower die 201 and the piston 205, reducing the jumping of the finished electrode sheet or secondary contact with the upper die blade 103. When the upper die assembly 100 returns and the floating lower die 201 needs to be lifted by the ejector rod, the magnetic field strength can be reduced to restore the magnetorheological fluid to a higher fluidity, thereby reducing the resistance when the ejector rod pushes the floating lower die 201 to reset.

[0053] The magnetic field strength of the excitation component 209 can be adjusted according to one or more parameters, such as the position of the upper die component 100, the punching load, the pressure inside the liquid storage chamber 206, and the displacement or movement speed of the floating lower die component 201. For the four stations arranged in a 2×2 matrix, the excitation components 209 of each station can be adjusted synchronously or separately, thereby forming a corresponding damping state according to the differences in punching load, blade wear state, or local thickness differences of the raw material plate 10 at each station. This provides a structural basis for reducing the total impact peak value during one-to-four synchronous punching and improving the punching consistency of the four finished electrode sheets.

[0054] Example 2: This example should be understood as including at least all the features of any of the foregoing examples, and further improving upon them; Furthermore, in a preferred embodiment, the mold is equipped with a magnetorheological damping adaptive control method. During the punching production process, the motion state of the floating lower mold 201 corresponding to station A, station B, station C, and station D is detected in real time. Based on the dynamic response differences between different stations, the output state of the excitation component 209 corresponding to each station is adjusted to change the flow resistance of the magnetorheological fluid in the magnetically controlled narrow flow channel 207, so that the motion state of each floating lower mold 201 remains consistent during the punching process.

[0055] In this technical solution, since the four-die process requires the simultaneous forming of four electrode sheets in one punching operation, the different stations are affected by variations in raw material thickness, local material strength, blade wear, and hydraulic support conditions. This can lead to varying degrees of downward displacement and movement speed of the floating lower die 201 at different stations. Therefore, by establishing a four-station dynamic response model and using the motion consistency of the floating lower die 201 at each station as the control objective, the magnetorheological damping state of each station is independently adjusted.

[0056] The control method includes the following steps: S100: Obtain the status parameters of each punching station.

[0057] During the punching process, status data are collected at stations A, B, C, and D respectively. Specifically, detection units are set at corresponding positions of each station to acquire the displacement parameters of the floating lower module 201, the punching pressure parameters, the pressure parameters of the liquid storage chamber 206, and the current operating parameters of the excitation assembly 209.

[0058] The real-time status data of the i-th workstation is represented as follows: ; In the above formula, i represents the station number, corresponding to station A, station B, station C, and station D respectively; Di(t) represents the displacement of the floating lower module 201 in the i-th station relative to its initial position at time t; Fi(t) represents the real-time punching pressure on the i-th station; Pi(t) represents the magnetorheological fluid pressure in the liquid storage chamber 206 of the i-th station; and Ii(t) represents the current input current of the excitation component 209 in the i-th station.

[0059] The displacement parameter Di can be acquired by a displacement detection component, which can be positioned between the lower die base 211 and the floating lower die 201. Preferably, it is one of an eddy current displacement sensor, a grating displacement sensor, a magnetostrictive displacement sensor, or a laser displacement sensor. The amount of downward displacement of the floating lower die 201 during the punching process is obtained by detecting the change in distance between the floating lower die 201 and the fixed reference position. The initial position can be defined as the unified position to which each floating lower die 201 is supported by the push rod when it is not subjected to punching load.

[0060] The punching pressure parameter Fi can be acquired by a pressure detection component, which can be located between the floating lower die 201 and the piston 205, between the piston 205 and the cavity 203, or at the drive connection position of the upper die assembly 100. Preferably, the pressure detection component is located between the floating lower die 201 and the suspension support assembly, so that the detected pressure data can directly reflect the punching load borne by the floating lower die 201 in the corresponding workstation.

[0061] The pressure parameter Pi of the reservoir 206 represents the real-time pressure state inside the magnetorheological fluid circuit at the i-th station. This pressure parameter can be obtained using a pressure sensor installed on the side wall of the reservoir 206 or on the connecting fluid path 204. By detecting the pressure change of the magnetorheological fluid during the movement of the piston 205, the hydraulic damping state of the current suspension support assembly can be reflected, and this can be used to determine whether the flow resistance of the magnetorheological fluid meets the buffering requirements of the current punching process.

[0062] The excitation current parameter Ii represents the driving current currently applied to the electromagnetic coil by the excitation component 209 at the i-th station. This parameter can be obtained in real time by the driving circuit corresponding to the excitation component 209. The driving circuit may include a current detection module, a power driving module, and a control interface. By obtaining the current excitation current value, the current magnetic field adjustment state within the magnetically controlled narrow flow channel 207 can be determined and used as the basis parameter for subsequent damping correction calculations.

[0063] The displacement parameter Xi(t) of the floating lower module 201 is used to reflect the yielding state of the current station, the punching pressure parameter is used to determine the current punching stage, the magnetorheological fluid pressure parameter is used to reflect the dynamic response state of the suspension support assembly, and the excitation current parameter is used to record the current damping adjustment state.

[0064] S200: Calculate the dynamic motion parameters of the floating lower module 201.

[0065] Since the movement speed of the floating lower mold 201 directly affects the electrode punching quality, the real-time movement speed of the floating lower mold 201 at each station is calculated based on the displacement data obtained from continuous sampling. That is: ; In the above formula: Vi(t) represents the movement speed of the floating lower module 201 at the i-th station at time t; Δt represents the time interval between two adjacent sampling times, which can be specifically set according to the punching speed.

[0066] The real-time motion speeds corresponding to the four workstations are obtained through the above calculations: VA(t), VB(t), VC(t), and VD(t). When the motion speed of a certain workstation is significantly higher than that of the others, it indicates that the magnetorheological fluid damping at that workstation is relatively small, resulting in faster retraction of the floating lower module 201 after being subjected to a punching load. Conversely, when the motion speed of a certain workstation is significantly lower than that of the others, it indicates that the damping at that workstation is too large, thus restricting the movement of the floating lower module 201.

[0067] S300: Establish four-station dynamic reference status.

[0068] For example, in order to avoid error accumulation caused by using a single workstation as a control reference, a dynamic reference is established based on the real-time motion status of the four workstations.

[0069] Specifically, the average displacement Dm(t) of module 201 under the floating conditions of the four stations is calculated, that is: ; Furthermore, the average motion speed, Vm(t), is calculated based on the motion speed of each station. By establishing a dynamic reference state, the control process is made independent of fixed stations, and the adjustment target is determined based on the overall response state of the four stations.

[0070] S400: Calculates the dynamic deviation of the workstation.

[0071] Calculate the motion deviation of each station relative to the dynamic reference state. The motion deviation includes: Displacement deviation: ; And, speed deviation: ; When EV,i(t) > 0 at a certain station, it indicates that the descent speed of the floating module 201 at that station is higher than the overall level. This indicates that the magnetorheological damping at that station is insufficient, and the output of the excitation component 209 needs to be increased to increase the flow resistance of the magnetorheological fluid in the magnetically controlled narrow flow channel 207. If EV,i(t) < 0, it indicates that the descent speed of the floating module 201 at that station is lower than the overall level. This indicates that the damping at that station is too large, and the output of the excitation component 209 needs to be reduced to restore the flow capacity of the magnetorheological fluid.

[0072] S500: Calculate the damping correction of the excitation component 209.

[0073] The output current of the excitation component 209 is corrected based on the speed deviation of each station.

[0074] For example, the excitation correction can be calculated using a nonlinear error mapping method: ; In the above formula, ΔIi represents the correction amount of the excitation current at the i-th station; δi represents the maximum excitation adjustment range; V0 represents the speed deviation normalization parameter; and tanh represents the hyperbolic tangent function.

[0075] The maximum allowable output current of the excitation component 209 is determined, for example, by setting it to 5% to 20% of the rated current, to limit the single adjustment range and avoid abrupt changes in the damping state of the magnetorheological fluid. V0 is determined based on the maximum allowable movement speed deviation of the mold, so that small movement disturbances will not trigger significant adjustments, while larger movement deviations can quickly generate damping corrections.

[0076] The above nonlinear mapping method enables the excitation adjustment to change continuously with the position deviation and limits the adjustment range under extreme conditions.

[0077] S600: Stage compensation based on changes in punching pressure.

[0078] Since the motion state of the floating lower module 201 is affected not only by damping but also by the change in punching pressure, the current punching load change state is further determined based on the change rate of punching pressure.

[0079] For example, the pressure change rate is calculated as follows: ; For example, a preset pressure change threshold Kmax is set. When KF,i(t)>Kmax, it indicates that the station is in a stage of rapid increase in punching load. At this time, the upper die blade 103 is rapidly cutting into the raw material plate, and the dynamic support capacity needs to be improved. The pressure compensation amount ΔIF,i of the output current of the excitation component 209 can be further increased. ; Among them, the pressure change threshold KF and the pressure compensation coefficient Kp can be determined based on the mold structure strength, the cutting speed of the blade, and the allowable impact load range.

[0080] S700: Outputs excitation control signal to excitation component 209.

[0081] Based on the motion deviation correction and pressure compensation, calculate the final excitation control current of the excitation assembly 209 at position i in the next control cycle: ; Based on the above calculation results, the control module outputs control signals to the excitation components 209 corresponding to workstations A, B, C, and D, respectively, so that the corresponding magnetic field strength is generated in each magnetically controlled narrow flow channel 207.

[0082] When the descent speed of a certain station is too fast, the corresponding excitation current is increased to increase the damping of the magnetorheological fluid; when the descent speed of a certain station is too slow, the corresponding excitation current is decreased to decrease the damping of the magnetorheological fluid.

[0083] Furthermore, after each punching or multiple punching operations, a punching cycle stability evaluation can be performed to assess the dynamic consistency of the four workstations.

[0084] For example, after a single punching operation, the displacement dispersion σD of the four workstations is calculated: ; Based on the allowable error of the electrode size and the requirements of mold processing accuracy, σ0 is set as the preset consistency threshold. When the displacement dispersion σD is greater than σ0, it indicates that the dynamic response of the four stations differs greatly, and the control module increases the damping adjustment range in the next punching cycle; otherwise, it indicates that the four stations maintain good consistency, and the current excitation control parameters are maintained.

[0085] Example 3: This example should be understood as including at least all the features of any of the foregoing examples, and further improving upon them; Further details are attached. Figure 5 The illustration shows an exemplary implementation of the computer system used to control the operation of the excitation component 209 when performing punching processing with the mold proposed in this technical solution.

[0086] For example, computer system 500 includes bus 502 or other communication mechanism for transmitting information, and one or more processors 504 coupled to bus 502 for processing information; processor 504 may be, for example, one or more general-purpose microprocessors.

[0087] Computer system 500 also includes main memory 506, such as random access memory (RAM), cache and / or other dynamic storage devices, coupled to bus 502 for storing information and instructions to be executed by processor 504; main memory 506 may also be used to store temporary variables or other intermediate information during the execution of instructions executed by processor 504; when these instructions are stored in storage media accessible to processor 504, they present computer system 500 as a dedicated machine customized to perform the operations specified in the instructions.

[0088] The computer system 500 may also include a read-only memory (ROM) 508 or other static storage device coupled to the bus 502 for storing static information and instructions of the processor 504; among which, storage devices 510 such as disks, optical discs or USB drives (flash drives) will be coupled to the bus 502 for storing information and instructions.

[0089] Furthermore, the bus 502 may also include a display 512 for displaying various information, data, media, etc., and an input device 514 for allowing users of the computer system 500 to control, manipulate, and / or interact with the computer system 500.

[0090] A preferred method of interacting with the management system may be through a cursor control device 516, such as a computer mouse or a similar control / navigation mechanism.

[0091] Furthermore, the computer system 500 may also include a network device 518 coupled to the bus 502; wherein the network device 518 may include components such as wired network cards, wireless network cards, switching chips, routers, switches, etc. Generally speaking, the terms “engine,” “component,” “system,” and “database” used in this article can refer to the logic embodied in hardware or firmware, or to a set of software instructions that may have entries and exit points, written in programming languages ​​such as Java, C, or C++; software components can be compiled and linked into executable programs, installed in dynamic link libraries, or written in interpreted programming languages ​​such as BASIC, Perl, or Python; it should be understood that software components can be called from other components or from themselves, and / or can be called in response to detected events or interrupts.

[0092] Software components configured to execute on a computing device may be provided on a computer-readable medium, such as an optical disc, digital video disc, flash drive, magnetic disk, or any other tangible medium, or as a digital download (and may be initially stored) in a compressed or installable format that requires installation, decompression, or decryption prior to execution; such software code may be stored, in part or in whole, on a memory device executing the computing device; software instructions may be embedded in firmware, such as an EPROM; it should also be understood that hardware components may consist of connected logic units (e.g., gates and flip-flops), and / or may consist of programmable units (e.g., programmable gate arrays or processors).

[0093] Computer system 500 includes technologies described herein that can be implemented using custom hardwired logic, one or more ASICs or FPGAs, firmware and / or program logic, which, when combined with the computer system, enables computer system 500 to become a dedicated computing device.

[0094] According to one or more embodiments, the techniques described herein are executed by computer system 500 in response to processor 504 executing one or more sequences of one or more instructions contained in main memory 506; such instructions may be read into main memory 506 from another storage medium such as storage device 510; execution of the sequence of instructions contained in main memory 506 causes processor 504 to perform the processing steps described herein; in alternative embodiments, hardwired circuitry may be used in place of or in combination with software instructions.

[0095] As used herein, the term "non-transitory medium" and similar terms refer to any medium that stores data and / or instructions that enable a machine to operate in a particular manner; such non-transitory medium may include non-volatile medium and / or volatile medium; non-volatile medium includes, for example, optical discs or magnetic disks, such as storage device 510; volatile medium includes dynamic memory, such as main memory 506.

[0096] Common forms of non-transitory media include, for example, floppy disks, hard disks, solid-state drives, magnetic tapes or any other magnetic data storage media, CD-ROMs, any other optical data storage media, any physical media with a hole pattern, RAM, PROMs and EPROMs, FLASH-EPROMs, NVRAMs, any other memory chips or cartridges and their network versions.

[0097] Non-transient media are different from transmission media, but can be used in conjunction with transmission media; transmission media participate in information transmission between non-transient media; for example, transmission media include coaxial cables, copper wires and optical fibers, including the wires that constitute bus 502; transmission media can also take the form of sound waves or light waves, such as radio waves and infrared data communication.

[0098] While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations can be appropriately omitted, substituted, or added to various processes or components. For example, in alternative configurations, methods can be performed in a different order than those described, and / or various components can be added, omitted, and / or combined. Moreover, features described with respect to certain configurations can be combined in various other configurations, such as different aspects and elements of the configuration can be combined in a similar manner. Furthermore, the elements therein can be updated as the technology develops; that is, many elements are examples and do not limit the scope of this disclosure or the claims.

[0099] Specific details are provided in the specification to offer a thorough understanding of exemplary configurations, including implementations. However, configurations can be practiced without these specific details; for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail to avoid obscuring the configuration. This description provides only exemplary configurations and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes can be made to the function and arrangement of the elements without departing from the spirit or scope of this disclosure.

[0100] In summary, the above detailed description is intended to be illustrative rather than restrictive, and it should be understood that these embodiments are for illustrative purposes only and not for limiting the scope of protection of the invention. After reading the description of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent changes and modifications also fall within the scope defined by the claims of this invention.

Claims

1. A one-piece die for punching four electrode sheets in a new energy battery, characterized in that, The integrated mold includes an upper mold assembly (100) and a lower mold assembly (200) arranged opposite to each other. The upper mold assembly (100) is capable of reciprocating relative to the lower mold assembly (200) along the mold opening and closing direction. The upper die assembly (100) includes an upper die base (101), an upper die body (102), an upper die blade (103), a pressure plate (104), and an elastic support member (105). The upper die blade (103) is provided with multiple punching areas, and the pressure plate (104) is disposed inside the punching areas formed by the upper die blade (103). The lower die assembly (200) is provided with four punching stations arranged in a 2×2 matrix corresponding to the multiple punching areas. Each punching station is provided with a floating lower die (201). The floating lower die (201) is installed in the guide space formed by the corresponding side wall (202) and can generate displacement within a preset range along the opening and closing direction of the die. Multiple suspension support assemblies are provided below the floating lower module (201). Each suspension support assembly includes a cavity (203), a piston (205) disposed in the cavity (203), and a liquid storage cavity (206) formed below the piston (205). The liquid storage cavity (206) is filled with magnetorheological fluid. Multiple liquid storage chambers (206) within the same punching station are interconnected through a connecting liquid passage (204). A magnetically controlled narrow flow channel (207) is provided in the connecting liquid passage (204). An excitation component (209) for changing the flow resistance of the magnetorheological fluid is provided around the magnetically controlled narrow flow channel (207). The excitation component (209) changes the motion damping of the floating lower module (201) by adjusting the magnetic field strength acting on the magnetorheological fluid. The connecting liquid passage (204) is connected to the compensation chamber (210) to compensate for the volume change caused by the magnetorheological fluid flowing between the storage chamber (206) and the connecting liquid passage (204); A push rod (208) is provided below the floating lower mold (201), and the push rod (208) is used to lift the floating lower mold (201) to a preset position after punching is completed.

2. The integrated mold as described in claim 1, characterized in that, A sliding fit clearance is formed between the floating lower die (201) and the side wall (202). The side wall (202) is used to limit the displacement of the floating lower die (201) in the horizontal direction and to limit the floating lower die (201) from tilting during the punching process. The inner side of the side wall (202) is provided with at least one of a wear-resistant guide layer, a guide bushing, or a lubrication structure to reduce the frictional resistance of the floating lower die (201) during the reciprocating motion.

3. The integrated mold as described in claim 1, characterized in that, At least two suspension support assemblies are provided below each of the floating lower modules (201), and a plurality of the suspension support assemblies are distributed along the bearing area of ​​the floating lower module (201); The position of the suspension support assembly is determined according to the structural dimensions, punching area distribution and punching load distribution of the floating lower module (201), so that multiple suspension support assemblies can jointly support the floating lower module (201) and reduce local load concentration.

4. The integrated mold as described in claim 1, characterized in that, The magnetically controlled narrow flow channel (207) is disposed between the connecting liquid passage (204) and the compensation cavity (210), and the flow cross-sectional area of ​​the magnetically controlled narrow flow channel (207) is smaller than the other flow areas of the connecting liquid passage (204); The excitation assembly (209) includes an electromagnetic coil and a magnetic conductor disposed around or inside the electromagnetic coil. The magnetic field generated by the excitation assembly (209) passes through the magnetically controlled narrow flow channel (207) to change the flow resistance of the magnetorheological fluid when it passes through the magnetically controlled narrow flow channel (207).

5. The integrated mold as described in claim 1, characterized in that, The compensation cavity (210) is provided with at least one of an elastic diaphragm, a floating piston, or an elastic bladder to separate the magnetorheological fluid from the compensation space. When the floating lower module (201) is subjected to a punching load and moves downward, the piston (205) compresses the magnetorheological fluid in the reservoir (206), causing the magnetorheological fluid to flow into the compensation cavity (210) through the connecting liquid passage (204), and causing the compensation cavity (210) to generate a corresponding elastic restoring force.

6. The integrated mold as described in claim 1, characterized in that, The push rod is located below the floating lower mold (201) and moves along the mold opening and closing direction; During the punching process, the upper end of the push rod maintains a preset distance from the floating lower die (201), so that the movement of the floating lower die (201) is buffered by the suspension support assembly; After punching is completed, the push rod moves upward and contacts the floating lower mold (201) to push the floating lower mold (201) back to the initial support position.

7. The integrated mold as described in claim 1, characterized in that, Each of the punching stations is provided with an independent magnetorheological fluid circuit and a corresponding excitation component (209). Each excitation component (209) can adjust the magnetic field strength of the magnetically controlled narrow flow channel (207) in the corresponding punching station. By changing the output state of the excitation components (209) corresponding to different punching stations, the floating lower modules (201) of different punching stations can obtain the same or different motion damping.

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