Modular pressing preparation method and device for an origami structure

Abstract

The present invention provides a modular pressing preparation method and device for an origami structure, belonging to the technical field of origami structure preparation. The device includes a lower pressing die, an upper pressing die, and a fixed base. The upper and lower pressing dies are respectively composed of a plurality of concave and convex modules. The fixed base is provided with a longitudinal sliding module and a transverse sliding module. The transverse sliding module moves vertically relative to the longitudinal sliding module and is fixed. The lower pressing die is fixed inside the transverse sliding module and the longitudinal sliding module. The upper pressing die is installed at the bottom of the punching head and is adapted to the lower pressing die to press the thin plate material into an origami structure. The method includes steps such as designing a modular pressing die, fixing the die, selecting a metal thin plate, positioning, pressing, cutting, and pasting and overlapping. It can conveniently obtain origami structure-pressed metal thin plates with different optimized or gradient designs, reduce the production cost of repeatedly preparing a whole set of pressing dies, reduce the complexity of the process, and make the preparation of the origami structure more economical and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of the pressing and forming preparation of origami structures, and in particular to a modular pressing and forming preparation method and device for origami structures. Background Art

[0002] Origami structures have extensive practical applications in engineering fields such as aerospace and impact protection and energy absorption, such as origami solar panels. Origami structures can be folded from a specific material panel along the creases of a specific origami pattern. Among them, the Miura origami pattern is one of the origami patterns widely used in the engineering field and has gradually been applied to the design of impact protection and energy absorption structures with the in-depth research. Traditional negative Poisson's ratio structures have good protection performance and are anisotropic structures, but they can only produce a negative Poisson's ratio effect in one direction orthogonal to the compression direction. However, the negative Poisson's ratio structure improved by origami can have a negative Poisson's ratio effect in two orthogonal directions perpendicular to the compression direction at the same time. The double-arrow negative Poisson structure forms an origami three-way negative Poisson's ratio structure after being improved by origami. Since this structure produces a negative Poisson's ratio effect in two directions when compressed, it has a stronger ability to shrink and deform inward, thus obtaining better impact protection and energy absorption characteristics, and further improving the overall protection performance of the structure.

[0003] At present, many technicians use advanced methods such as additive manufacturing to prepare metal origami structures. However, compared with traditional forged metals, the obtained structures are prone to inevitable process defects such as discontinuous cross-sections and step effects. At the same time, the high cost further limits the production size and scale of origami structures. Some technicians use the preparation method of processing forged metal materials, but still need the assistance of complex processes or equipment such as laser cutting and punching, chemical etching, cold air pumping, and large-scale precision equipment, which increases the preparation cost of the structure and makes the process more cumbersome and complex. A relatively simple preparation method is to stamp a metal sheet with excellent ductility through a simple pressing die to obtain a metal sheet with a folded shape of a corresponding origami pattern, and finally obtain the corresponding metal origami structure by bonding multiple metal sheets to each other. However, the pressing die used in this preparation method is usually used to manufacture origami structures composed of structural units with the same geometric parameters. For example, the invention patent application with the patent publication number CN114211775A discloses a composite material laminated origami negative Poisson's ratio structure and a preparation method based on a hot die pressing forming process. When the origami structure configuration needs to be further optimized / gradient designed to meet the actual engineering needs and cope with dynamic loads such as different types of impacts and explosions, a corresponding set of pressing dies needs to be reprocessed and manufactured, which will undoubtedly increase the preparation cost and workload of the origami structure and is not conducive to the preparation and processing of origami structures with optimized / gradient designs with better protective energy absorption. The preparation method of such origami structures lacks flexibility and mobility, has a narrow range of applicable preparation and processing structure configurations, cannot meet the manufacturing and processing after further configuration design changes, and is difficult to cope with complex and changeable actual engineering conditions.

[0004] Based on the possible process defects of common metal origami structures prepared by current metal additive manufacturing and traditional simple pressing die methods, as well as the high cost of the preparation method, and the fact that only origami structures with a uniform unit configuration can be prepared, and it is impossible to flexibly replace the pressing die, resulting in the need to re-prepare the entire set of dies when preparing optimized / gradient designed origami structures and other disadvantages of the prior art, the present invention proposes a modular pressing preparation method and device for an origami structure based on a specific configuration of the origami structure, so as to improve the flexibility and economic benefits of preparing the origami structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular pressing preparation method and device for an origami structure. By simply replacing the modular pressing blocks corresponding to the configuration parameters, a pressed metal sheet of an origami structure with different optimized or gradient designs can be conveniently obtained, reducing the production cost of repeatedly preparing the entire set of pressing dies, reducing the complexity of the process, making the preparation of the origami structure more economical and efficient, breaking through the limitations of the single-configuration manufacturing of the original preparation method, and modularly processing and preparing origami structures with different combinations, optimizations, gradient designs, etc.

[0006] On the one hand, the present invention provides a modular pressing preparation device for an origami structure, including: a lower pressing die, an upper pressing die, and a fixed base. The lower pressing die is composed of a plurality of pressing convex modules detachably connected and combined. The upper pressing module is composed of a plurality of pressing concave modules detachably connected and combined. A longitudinal sliding module and a transverse sliding module are arranged on the fixed base. The longitudinal sliding module and the transverse sliding module are arranged perpendicular to each other, and the transverse sliding module can move vertically relative to the longitudinal sliding module and be fixed. The lower pressing die is fixed inside the transverse sliding module and the longitudinal sliding module. The upper pressing die is installed at the bottom of the punching head and is used to cooperate with the lower pressing die to press a thin plate material into an origami structure unit.

[0007] Preferably, the lower pressing die is composed of a plurality of pressing convex modules arranged and combined after being clamped by connecting convex blocks and connecting grooves provided on their adjacent side surfaces.

[0008] Preferably, the upper pressing die is composed of a plurality of pressing concave modules arranged and combined after being clamped by the connecting convex blocks and the connecting grooves provided on their adjacent side surfaces.

[0009] Preferably, the fixed base is rectangular, and mounting holes are respectively provided at its four corners. Four guide rods respectively pass through each of the mounting holes, and the height of the fixed base can be adjusted by adjusting the length of the guide rods extending out of the mounting holes.

[0010] Preferably, a group of parallel longitudinal extending slideways are arranged on the fixed base. The longitudinal sliding module includes two cross plates perpendicular to the slideways. Clamping grooves adapted to the slideways are respectively provided at the near two ends of the cross plates. Fixed grooves are arranged on the outer sides of the slideways, and the two ends of the cross plates can be fixed by cooperating with the fixed grooves through fasteners.

[0011] Preferably, a through and transversely extending chute is opened on the side surface of the cross plate. The transverse sliding module can slide relative to the chute, thereby limiting the lower pressing die within the area surrounded by the transverse sliding module and the cross plate.

[0012] Preferably, the transverse sliding module includes a longitudinal plate. An opening groove extending longitudinally is opened on the longitudinal plate. One end of the longitudinal plate sequentially passes through the chutes on the two cross plates and is provided with a locking mechanism cooperating with the opening groove for locking.

[0013] Preferably, the locking mechanism includes a locking sleeve and a fastener. One end of the longitudinal plate passes through the locking sleeve, and the fastener passes through the locking sleeve and the opening groove and is locked, thereby limiting the lower pressing die within the area surrounded by the longitudinal plate and the cross plate.

[0014] On the other hand, the present invention also provides a method for modular pressing and manufacturing of an origami structure using the above device, comprising the following steps:

[0015] (1) Design the size of the origami structure according to engineering requirements, obtain the geometric parameters of the origami pattern structure unit of the required origami structure and the pressing size of the metal thin plate, as well as the corresponding number of pressing convex modules and pressing concave modules;

[0016] (2) Disassemblably arrange and combine the pressing convex modules to form a lower pressing die, disassemblably arrange and combine the pressing concave die blocks to form an upper pressing die, place the lower pressing die on a fixed base,

[0017] and fix its position through a longitudinal sliding module and a transverse sliding module;

[0018] (3) Determine and select a metal thin plate with appropriate size and good ductility;

[0019] (4) Place the metal thin plate on the lower pressing die and position it through the guide rods at the four corners of the fixed base;

[0020] 5(5) Align the upper pressing die with the lower pressing die through the guide rods and make it slowly drop until it

[0021] falls onto the metal thin plate, apply a uniform downward pressure to it, and gradually press it downward until the metal thin plate with the desired Miura origami pattern configuration is obtained;

[0022] (6) Cut the metal thin plate pressed into the origami pattern configuration to the designed size, and then stack and bond multiple metal thin plates vertically and horizontally to form the designed origami structure.

[0023] 0Preferably, in step (1), the pressing convex modules and pressing concave modules can be modularly replaced according to different origami structure patterns, and the above steps (2)-(6) are repeated to obtain metal thin plates of origami structures designed with different geometric configuration parameters.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The modular pressing and manufacturing device and method of the present invention are applicable to the processing and manufacturing of single metal thin plates or other materials with good ductility corresponding to origami structures such as uniform, optimized, and gradient designs. Different modular pressing blocks (i.e., pressing convex modules and pressing concave modules) can be flexibly replaced to obtain metal thin plates of origami structures designed with different configuration geometric parameters, realizing the modular pressing and manufacturing of origami structures with different configurations, avoiding repeated processing of structural molds, reducing the preparation cost and processes of origami structures, improving the economic benefits and efficiency of preparation, and having good application scope and production universality;

[0026] (2) The above modular pressing preparation method can be extended, according to the ideological method of its modular preparation, to prepare thin metal plates with the same design principle or common origami structure shapes of the same type, as well as the preparation of corresponding optimized / gradient design configuration structures, improving the batch modular pressing preparation of stacked common origami structures of the same type, avoiding the increase in production costs caused by secondary design, and enhancing the production efficiency and effectiveness of stacked origami structures designed based on the origami principle;

[0027] (3) The constituent structural units of a specific configuration origami structure based on and in the preferred embodiment of the modular preparation method have rich geometric design parameters and can be flexibly designed according to the size and performance requirements of different engineering practical applications;

[0028] (4) Applying the gradient design concept to the design of a specific configuration origami structure based on and in the preferred embodiment of the preparation method, different optimized / gradient design origami structures can be combined, reasonably regulating the deformation failure sequence and protection functions of different layer structural units, etc., to achieve better protection performance. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the Miura origami structure and its constituent units in the embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of Miura origami structures with different gradient designs in the embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the disassembled structure of the downward pressing mold with uniform and longitudinally gradient designs in the embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the fixed base in the disassembled and assembled states in the embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the process of preparing an origami structure thin metal plate by the modular pressing preparation method in the embodiment of the present invention.

[0035] Description of the Reference Numerals:

[0036] 1: Downward pressing die; 101: Pressing convex module; 102: Connecting convex block; 103: Connecting groove; 2: Upper pressing die; 201: Pressing concave module; 3: Fixed base; 301: Mounting hole; 302: Slideway; 303: Fixed groove; 4: Longitudinal sliding module; 401: Cross plate; 402: Card slot; 403: First fastener; 404: Chute; 5: Transverse sliding module; 501: Longitudinal plate; 502: Open slot; 503: Locking sleeve; 504: Second fastener; 6: Guide rod. Detailed implementation manner

[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The proposed modular pressing preparation method for the origami structure of the present invention is based on, and as a preferred embodiment, the main structure is a three-dimensional origami structure composed of a periodic array of two stacked Miura origami pattern structural units with the same depth fold angle, side length, and different panel folding angles, which are stacked by several metal sheets with Miura origami patterns. As Figure 1 shown, the origami structure can be reasonably stacked up and down in a certain order by several metal sheets with Miura origami patterns of different parameters. The metal sheets are composed of a periodic array of Miura origami pattern configuration units ( Figure 1 (b) of Figure 1 ). In the example of (c) of Figure 1 , the shown structure is an origami structure composed of three arrays in the y direction after two Miura origami metal sheets 1 and 2 with different dihedral angle parameters are stacked up and down. The configuration parameters of the Miura origami pattern structural units of the two origami structure metal sheets 1 and 2 are the same in the x and z directions. The Miura origami pattern structural units of the metal sheets 1 and 2 can be regarded as composed of four completely identical parallelogram metal sheets spliced at a certain face folding angle, and this combination satisfies the basic origami algorithm principle; the structural units of the two metal sheets 1 and 2 stacked up and down should also have the same transverse fold angle μ, side length 2s, side length 2l, and different dihedral angles α1 and α2, so that the corresponding positions above and below can be glued along the corresponding crease positions to form an open tubular origami structure (as shown in Figure 2The four configurations shown: the Miura origami negative Poisson's ratio structure with gradient design along the transverse, longitudinal, height directions, and simultaneously along the transverse and longitudinal directions. The optimization / gradient design method of the above structure mainly involves obtaining structural units with different topological configurations by changing the geometric parameters of the origami structure, and then combining the numbers of the Miura origami structural units arrayed in three orthogonal directions according to engineering requirements to obtain the optimized / gradient-designed origami structure. The main way of the optimization / gradient design method is to change the main geometric parameters of the structural unit alone or simultaneously and perform spatial permutations and combinations on them. The geometric parameters to be changed include but are not limited to changing the side length 2l of the structural unit, changing the folding angle μ of the structural unit, changing the length 2s of the structural unit, changing the dihedral angle α between the metal thin plates in the structural unit, simultaneously changing the side length 2s and the folding angle μ of the structural unit, simultaneously changing the side length 2l and the folding angle μ of the structural unit, etc.; the numbers and permutations and combinations of structural units with different geometric parameters in space can be designed according to actual engineering needs. The configurations of the corresponding optimization / gradient design of the origami structure can reasonably control the deformation failure sequence and protection performance of different layer structures, etc., so as to regulate the protection performance of the origami structure to achieve better protection and energy absorption effects, to cope with the structural protection under different types of loadings, and to better meet the needs of protection performance, structural size, and configuration design in actual engineering.

[0041] As Figures 3 - 5 shown, the present invention provides a modular pressing and forming preparation device for the above origami structure, including: a lower pressing die 1, an upper pressing die 2, and a fixed base 3. Among them, the lower pressing die 1 is composed of a plurality of pressing convex modules 101 detachably connected and combined. After the lower pressing die 1 is combined, it can be fitted with the above Miura origami pattern structural unit. The upper pressing module 2 is composed of a plurality of pressing concave modules 201 detachably connected and combined. The shape and structure of the lower pressing die 1 are adapted to the upper pressing module 2. The two cooperate to punch the metal thin plate, and a metal thin plate with the above Miura origami pattern structural unit can be pressed out, and then it is fixed and glued to complete the preparation of the origami structure with specific or optimized and gradient design. A longitudinal sliding module 4 and a transverse sliding module 5 are arranged on the fixed base 3. The longitudinal sliding module 4 and the transverse sliding module 5 are arranged perpendicular to each other, and the transverse sliding module 5 can move vertically relative to the longitudinal sliding module 4 and be fixed, that is, the longitudinal sliding module 4 has the degree of freedom to slide longitudinally, and the transverse sliding module 5 has the degree of freedom to slide transversely to adapt to lower pressing dies 1 of different sizes. The lower pressing die 1 can be fixed inside the transverse sliding module 5 and the longitudinal sliding module 4 through the two. The upper pressing die 2 can be installed at the bottom of the punching head and is used to cooperate with the lower pressing die 1 to press materials such as metal thin plates into the above origami structure.

[0042] In this embodiment, the downward pressing die 1 is formed by arranging and combining a plurality of pressing convex modules 101 through clamping engagement of connecting convex blocks 102 and connecting grooves 103 provided on their adjacent side surfaces, so as to achieve a configuration size consistent with the origami-structured metal sheet required by the design. Correspondingly, the upward pressing die 2 is formed by arranging and combining a plurality of pressing concave modules through clamping engagement of connecting convex blocks 102 and connecting grooves 103 provided on their adjacent side surfaces.

[0043] The fixed base 3 is used to fix the position of the downward pressing die 1. The fixed base 3 is rectangular, and mounting holes 301 are respectively provided at its four corners. Four guide rods 6 respectively pass through the respective mounting holes 301, and the height of the fixed base 3 can be adjusted by adjusting the length of the guide rods 6 extending out of the mounting holes 301. A set of longitudinally extending slideways 302 parallel to each other are provided on the fixed base 3. The slideways 302 protrude relative to the fixed base 3. The longitudinal sliding module 4 includes two cross plates 401 perpendicular to the slideways 302. Clamping grooves 402 adapted to the slideways 302 are respectively provided near the two ends of the cross plates 401. Fixed grooves 303 are provided on the outer sides of the slideways 302. The two ends of the cross plates 401 can be fixed in cooperation with the fixed grooves 303 through first fasteners 403. A through groove 404 extending transversely is formed in the side surface of the cross plate 401. The transverse sliding module 5 can slide relative to the through groove 404, and further confines the downward pressing die 1 within the area surrounded by the transverse sliding module 5 and the cross plate 401.

[0044] Specifically, the transverse sliding module 5 includes a longitudinal plate 501. An opening groove 502 extending longitudinally is formed in the longitudinal plate 501. One end of the longitudinal plate 501 sequentially passes through the through grooves 404 on the two cross plates 401, and a locking mechanism for locking in cooperation with the opening groove 502 is provided. The locking mechanism includes a locking sleeve 503 and a second fastener 504. A stop edge is provided at one end of the longitudinal plate 501, which can be stuck on the outer side of the cross plate 401. The other end of the longitudinal plate 501 passes through the two through grooves 404 and the locking sleeve 503. The second fastener 504 passes through the locking sleeve 503 and the opening groove 502 and is locked. The second fastener 504 is a connecting bolt and a nut. The relative position of the longitudinal plate 501 and the cross plate 401 can be fixed through the second fastener 504, so as to confine the position of the downward pressing die 1 within the area surrounded by the longitudinal plate 501 and the cross plate 401.

[0045] Similarly, a fixing device identical to the fixed base can also be provided at the bottom of the punching head to fix the position of the upward pressing die 2, so that it coincides with the downward pressing die 1 during stamping through the guide rods 6. The guide rods 6 play a role in pre-positioning the metal sheet in the early stage of pressing and guiding between the upper and lower pressing dies during the preparation process, and further enable the two to cooperate to press out the origami-structured metal sheet required by the design.

[0046] The upper and lower pressing molds and the fixing device 3 can select materials according to actual engineering needs and processing and preparation conditions, such as photosensitive resin commonly used in additive manufacturing technology, and materials such as stainless steel used in traditional mold processing.

[0047] On the other hand, the present invention also provides a method for preparing a modular pressing of an origami structure using the above device, including the following steps:

[0048] (1) Design the size of the origami structure according to engineering needs, obtain the geometric parameters of the origami pattern structure unit of the required origami structure and the pressing size of the metal thin plate, as well as the corresponding number of pressing convex modules and pressing concave modules;

[0049] (2) Disassemblably arrange and combine the pressing convex modules to form the lower pressing mold 1, disassemblably arrange and combine the pressing concave modules to form the upper pressing mold 2, place the lower pressing mold 1 on the fixed base 3, and fix its position through the longitudinal sliding module 4 and the transverse sliding module 5;

[0050] (3) Determine and select a metal thin plate with a suitable size and good ductility;

[0051] (4) Place the metal thin plate on the lower pressing mold 1 and position it through the guide rods 6 at the four corners of the fixed base 3;

[0052] (5) Align the upper pressing mold 2 with the lower pressing mold 1 through the guide rod 6 and slowly lower it until it falls onto the metal thin plate, apply a uniform downward pressure to it, and gradually press it downward until the metal thin plate with the designed Miura origami pattern configuration is obtained;

[0053] (6) Cut the metal thin plate pressed into the Miura origami pattern configuration to the designed size, and then stack and bond multiple metal thin plates vertically and horizontally to form the designed origami structure.

[0054] The preparation steps of steps (5) and (6) are simply illustrated as Figure 5 shown.

[0055] In the above modular pressing preparation method, the pressing convex modules and pressing concave modules can be modularly replaced according to different origami structure patterns in step (1), and the above steps (2)-(6) can be repeated to obtain metal thin plates with different geometric configuration parameters such as optimized / gradient design and their corresponding origami structures. The above modular pressing preparation method can be used to prepare metal thin plates with the same design principle or common origami structure shapes of the same type according to requirements, as well as the preparation of origami structures with corresponding optimized / gradient design configurations, not limited to the origami structure of the Miura origami pattern in the described embodiment.

[0056] Such as Figure 3As shown, the independent blocks of the downward pressing die 1 involved in the modular preparation method (i.e., the pressing convex blocks 101) should generally have the same side length 2l as the independent blocks in the same column and the same side length 2s as the independent blocks in the same row. At the same time, the blocks in the outermost two columns should have a certain platform width to provide sufficient redundant width as the cutting process design space described in step (6). The connection between several pressing convex blocks 101 is carried out through the connecting convex blocks 102 and the connecting grooves 103. Optionally, each independent block of the downward pressing die 1 involved in the preparation method can be made into structural units with two different side lengths s1 and s2 (as shown in (d) of Figure 3 ) of the size of half of the Miura origami pattern, so as to be used for preparing metal sheets with origami patterns of different side lengths for topologically optimized configurations.

[0057] The modular pressing preparation method can optimize / gradient design the configuration of the origami structure according to the actual engineering situation, and is not limited to the Miura origami structure. The modular pressing blocks (i.e., the pressing convex blocks 101 and the pressing concave blocks 201) corresponding to the optimized / gradient design positions can be replaced separately, and the main steps of the above preparation are repeated to obtain the corresponding optimized / gradient designed origami structure. Compared with the existing preparation methods of the same type of pressing die, the process of re-preparing the whole set of pressing die due to the configuration design of the origami structure can be avoided. By flexibly replacing the components of the pressing die, origami structures with optimized / gradient design configurations can be obtained, thereby reducing the processing and preparation costs, improving the economic benefits of batch preparation of origami structures, as well as the flexibility and universality of preparation.

[0058] The above-mentioned origami structure is only a preferred implementation structure case and design inspiration of the preparation method of the present invention. For those skilled in the art, the modular preparation idea method of the present invention can be extended to prepare metal sheets with common origami structure shapes having the same design principle or the same type, as well as the preparation of corresponding optimized / gradient designed configuration structures

[0059] In addition, the structural design form of the fixing device 3 in the present invention is only illustrative and not restrictive. It can have the ability to fix the downward pressing die 1 of different sizes, scales and forms; and at the same time, the connection method between the pressing convex blocks 101 is also only illustrative, mainly playing the main functions of modular splicing and assembly, pressing, adapting to different structural configuration designs, etc. This design idea method is the central idea of the modular pressing preparation method described in the present invention.

[0060] The above-mentioned origami structure is only a preferred implementation structure case and design inspiration of the preparation method of the present invention. For those skilled in the art, the modular preparation idea method of the present invention can be extended to prepare metal sheets with common origami structure shapes having the same design principle or the same type, as well as the preparation of corresponding optimized / gradient designed configuration structures.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A modular pressing preparation device for an origami structure, characterized in that Comprising: A downward pressing die, an upward pressing die and a fixed base. The downward pressing die is formed by arranging and combining a plurality of pressing convex modules through clamping connections with connecting convex blocks and connecting grooves provided on their adjacent sides. The upward pressing die is formed by arranging and combining a plurality of pressing concave modules through clamping connections with the connecting convex blocks and the connecting grooves provided on their adjacent sides. A longitudinal sliding module and a transverse sliding module are provided on the fixed base. The longitudinal sliding module and the transverse sliding module are arranged perpendicular to each other. A set of parallel longitudinal extending slideways are provided on the fixed base. The longitudinal sliding module includes two cross plates perpendicular to the slideways. Claw slots adapted to the slideways are respectively provided at near both ends of the cross plates. Fixed slots are provided on the outer sides of the slideways. Both ends of the cross plates can be fixed by cooperating with the fixed slots through fasteners. A chute penetrating the cross plates and extending transversely is provided on the side surface of the cross plates. The transverse sliding module can slide relative to the chute, thereby limiting the downward pressing die within the area surrounded by the transverse sliding module and the cross plates. And the transverse sliding module can vertically move relative to the longitudinal sliding module and be fixed, fixing the downward pressing die inside the transverse sliding module and the longitudinal sliding module. The transverse sliding module includes a longitudinal plate. An opening slot extending longitudinally is provided on the longitudinal plate. One end of the longitudinal plate sequentially passes through the chutes on the two cross plates and is provided with a locking mechanism cooperating with the opening slot. The locking mechanism includes a locking sleeve and a fastener. One end of the longitudinal plate passes through the locking sleeve. The fastener passes through the locking sleeve and the opening slot and is locked, thereby limiting the downward pressing die within the area surrounded by the longitudinal plate and the cross plates. The upward pressing die is installed at the bottom of a punching head and is used to cooperate with the downward pressing die to press a thin plate material into an origami structure unit.

2. The modular pressing and shaping preparation device for the origami structure according to claim 1, characterized in that, The fixed base is rectangular, and mounting holes are respectively provided at its four corners. Four guide rods respectively pass through each mounting hole, and the height of the fixed base can be adjusted by adjusting the length of the guide rods extending out of the mounting holes.

3. A method for modular stamping preparation of an origami structure using a modular stamping preparation device for the origami structure described in any one of claims 1-2, characterized in that, Including the following steps: (1) Design the size of the origami structure according to engineering requirements, obtain the geometric parameters of the origami pattern structure unit of the required origami structure and the pressing size of the metal thin plate, as well as the corresponding number of pressing convex modules and pressing concave modules; (2) detachably arrange and combine the pressing convex modules to form a downward pressing die, detachably arrange and combine the pressing concave modules to form an upward pressing die, place the downward pressing die on the fixed base, and fix its position through the longitudinal sliding module and the transverse sliding module; (3) determine and select a metal thin plate with appropriate size and good ductility; (4) place the metal thin plate on the downward pressing die and position it through the guide rods at the four corners of the fixed base; (5) align the upward pressing die with the downward pressing die through the guide rods and slowly lower it until it lands on the metal thin plate, apply a uniform downward pressure to it, and gradually press it down until obtaining the metal thin plate with the origami pattern configuration required by the design. (6) Cut the metal sheet pressed into the origami pattern configuration to the designed size, and then stack and bond multiple metal sheets vertically and horizontally to form the designed origami structure.

4. The method for preparing the modular pressing of the origami structure according to claim 3, characterized in that, In step (1), the embossing convex module and the embossing concave module can be modularly replaced according to different origami structure patterns, and the above steps (2)-(6) are repeated to obtain the metal sheets of the origami structure with different geometric configuration parameters designed.

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