A punch bending forming device for paper folding structure and a using method thereof

Abstract

This invention discloses a stamping and bending forming device and method for origami structures. The device includes, from top to bottom, a pressure plate, an upper base, an upper stamping unit, a flat part, a lower stamping unit, and a lower base. The upper stamping unit includes several guide components and stamping components arranged in a checkerboard pattern, with adjacent guide components and stamping components pivotally connected by connecting rods. The lower stamping unit has the same structure as the upper stamping unit, and the guide components and stamping components of the upper and lower stamping units are arranged opposite to each other. The guide components are telescopic structures, configured in a straightened state when not stamping, and the stamping components are at the same height as the straightened guide components. In the stamping state, the guide components shorten, creating a height difference with adjacent stamping components. Under the pivoting action of the connecting rods, the flat part is stamped and bent to form an origami structure. This invention is simple to operate, low in cost, and produces a stronger formed structure.

Description

Technical Field

[0001] This invention relates to stamping and bending dies, and more particularly to a stamping and bending forming device for origami structures and its method of use. Background Technology

[0002] With the continuous growth in demand for high-performance structural materials, lightweight and high-strength sandwich structures have attracted much attention in the engineering field, driving the emergence of new configurations and advanced manufacturing technologies. In sandwich structure design, the core layer configuration plays a decisive role in mechanical properties. Traditional sandwich structures often use honeycomb, aluminum foam, corrugated, or truss core materials, which, although having high stiffness in one direction, have insufficient load-bearing capacity in other directions, making them prone to uneven stress distribution and local instability. Origami, as an ancient art originating from the East, is becoming an important source of inspiration for engineering design and structural innovation. Researchers are gradually integrating origami principles into sandwich structure design, reviewing the mechanical characterization, basic principles, applications, and modeling methods of origami systems and structures, and revealing their broad application prospects. Studies have shown that bidirectional hollow origami structures have higher strength and reliability, but their complex structure makes them difficult to complete using ordinary processing methods. The previously common molding method is 3D printing, which is too costly, and the molded parts are powder sintered, resulting in low strength. Summary of the Invention

[0003] Purpose of the invention: The present invention aims to provide a stamping and bending forming device and method for directly stamping and bending flat parts into origami structures, which is simple to operate, low in cost, and produces a stronger formed structure.

[0004] Technical Solution: The present invention provides a paper-folding structure stamping and bending forming device, comprising, from top to bottom, a pressure plate, an upper base, an upper stamping unit, a flat plate part, a lower stamping unit, and a lower base; the upper stamping unit includes several guide components and several stamping components, which are arranged in a two-dimensional staggered array in a checkerboard pattern, and adjacent guide components and stamping components are pivotally connected by connecting rod components; the lower stamping unit has the same structure as the upper stamping unit, and the lower stamping unit... The guide component of the pressing unit is positioned opposite to the pressing component of the upper pressing unit, and the pressing component of the lower pressing unit is positioned opposite to the guide component of the upper pressing unit. The guide component is a telescopic structure, configured to be in a straightened state when not being pressed, and the pressing component and the straightened guide component have the same height. During the pressing state, the guide component shortens, creating a height difference with the adjacent pressing component. Under the pivoting action of the connecting rod component, the upper and lower pressing units press and bend the flat part to form a folded paper structure.

[0005] Preferably, the guide component includes a guide sleeve and a guide shaft. The guide sleeve has a top block on the side away from the guide shaft. The top block has an adjusting screw with its free end passing through the top block and the end of the guide sleeve for adjusting the stroke of the guide shaft. The guide shaft has a bushing on the end away from the guide sleeve. The bushing has a first universal ball bearing at its end. A spring is provided between the bushing and the guide sleeve.

[0006] Preferably, adjacent guide components and stamping components are connected by two connecting rod components at the top and bottom.

[0007] Preferably, the connecting rod component is a length-adjustable sleeve structure, including a connecting rod shaft, a connecting rod sleeve, and a lock nut. The connecting rod shaft and the connecting rod sleeve are threaded together and fixed by the lock nut. The length of the connecting rod component is adjusted by adjusting the fixed position of the connecting rod shaft and the connecting rod sleeve, so that the length of the connecting rod component is the same as the length of the hypotenuse of the origami structure.

[0008] Preferably, bolt holes are provided on the end faces of the guide component and the stamping component relative to the flat plate part for connecting stamping heads of different sizes.

[0009] Preferably, the flat part is pre-cut with several squares to form square holes according to the origami structure design dimensions, and notches are set at the four corners of each square hole as stress relief grooves during stamping and bending.

[0010] Preferably, the pressure plate is connected to a drive mechanism to provide stamping force for the origami structure stamping and bending forming device.

[0011] Preferably, the pressure plate, upper base, upper stamping unit, flat plate part, lower stamping unit, and lower base are pressed together under the action of the driving mechanism.

[0012] Preferably, the guide component and the stamping component are provided with universal ball bearings at their ends relative to the upper base and / or the lower base.

[0013] The method of using the origami structure stamping and bending forming device of the present invention includes the following steps: (1) Design the dimensions of the origami structure according to the required dimensions, and obtain the flat parts that need to be stamped into the origami structure according to the origami structure design dimensions; set the stroke of the guide component and the length of the connecting rod component based on the bevel and thickness of the origami structure; (2) Place the connected lower stamping unit onto the lower base, and place the cut flat parts that need to be stamped into a folded paper structure on the lower stamping unit; place the connected upper stamping unit on the flat parts, and then cover the upper base on the upper stamping unit. The pressure plate is connected to the hydraulic press. During stamping, the pressure plate moves downward to contact the upper base. (3) Turn on the hydraulic press and control the pressure plate to press the upper base until the maximum stroke of the guide component is reached, so that the flat part is stamped and bent into a paper-folding structure.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. It can quickly stamp flat parts into origami parts without reducing the thickness of the flat parts, thus ensuring their structural strength, and is lower and stronger than existing 3D printing molding; 2. The whole operation process is simple and fast, and has the function of positioning parts, which can be used for mass production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an overall cross-sectional view of the present invention after stamping; Figure 3 This is a cross-sectional view of the guide component of the present invention; Figure 4 This is a schematic diagram of the stamping component of the present invention; Figure 5 This is a cross-sectional view of the connecting rod component of the present invention; Figure 6 This is a schematic diagram of the connecting rod installation according to the present invention; Figure 7 This is a schematic diagram of the stamping mechanism of the present invention; Figure 8 This is a diagram illustrating the linkage motion of the present invention. Figure 9 This is a diagram illustrating the part forming process of the present invention; Figure 10 This is a schematic diagram of the linkage adjustment according to the present invention.

[0016] Among them, 1. Pressure plate; 11. Pressure plate; 12. Cylindrical part; 13. Reinforcing rib; 2. Baffle; 3. Guide component; 31. Guide sleeve; 32. Guide shaft; 33. Top block; 34. Adjusting screw; 35. Shim; 36. Bushing; 37. First universal ball bearing; 38. Spring; 4. Flat plate part; 5. Limiting piece; 6. Stamping component; 61. Body; 62. Stamping block; 63. Second universal ball bearing; 7. Connecting rod component; 71. Connecting rod shaft; 72. Connecting rod sleeve; 73. Hinge head; 74. Anti-loosening nut; 8. Stamping head. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1-2 As shown, the origami structure stamping and bending forming device of the present invention includes a pressure plate 1, an upper stamping unit and a lower stamping unit, as well as an upper base and a lower base.

[0019] The pressure plate 1 includes a pressure plate 11 and a cylindrical portion 12 connected to the pressure plate. Several reinforcing ribs 13 are evenly arranged at the connection between the pressure plate 11 and the cylindrical portion 12 to increase the strength of the pressure plate. The inner wall of the cylindrical portion 12 is threaded for connection with the shaft end of the hydraulic cylinder of the hydraulic press. The pressure plate 11 is used to evenly transmit the punching force.

[0020] The upper and lower bases have identical structures, both being flat plate structures. Vertical baffles 2 are installed around the perimeter of each flat plate structure for limiting movement. The baffles 2 are made of thin sheet metal bent and are bolted to the perimeter of the base surface.

[0021] Preferably, the flat plate structure of the base is provided with handles on opposite sides for easy operation.

[0022] The upper stamping unit includes several guide components 3 and several stamping components 6, which are arranged in a two-dimensional staggered array in a checkerboard pattern. That is, the guide components 3 are connected to the stamping components 6 in both the longitudinal and transverse directions, and the stamping components 6 are connected to the guide components 3 in both the longitudinal and transverse directions.

[0023] like Figure 3 As shown, the guide component 3 includes a guide sleeve 31 and a guide shaft 32. The guide shaft 32 and the guide sleeve 31 are fitted with a clearance fit and can be lubricated appropriately. The stroke of the guide shaft 32 is designed to be the same as the downward stroke of the origami structure.

[0024] A top block 33 is provided on the side of the guide sleeve 31 away from the guide shaft 32. To enable the guide component to adjust the travel of the guide shaft, an adjusting screw 34 is provided inside the top block 33, with its free end passing through both the top block 33 and the end of the guide sleeve 31. The adjusting screw 34 is used to adjust the travel of the guide shaft 32. Preferably, the adjusting screw 34 and the inner top wall of the top block 33 are provided with several washers 35. The free end of the adjusting screw 34 passes through the washers 35 and the top block 33 and connects to the threaded through hole at the bottom of the guide sleeve 31. By adjusting the number and thickness of the washers 35, the length of the guide shaft 32 entering the guide sleeve 31 is adjusted, thus limiting the travel of the guide shaft 32 inside the guide sleeve, thereby adapting to folding structures of different thicknesses.

[0025] The guide shaft 32 has a bushing 36 at its end away from the guide sleeve 31. A first universal ball bearing 37 is located at the end of the bushing 36. A spring 38 is positioned between the bushing 36 and the guide sleeve 31. The first universal ball bearing 37 is opposite to the upper base, and the top block 33 is opposite to the flat part 4 that needs to be stamped into a folded paper structure. In its initial natural state, the spring 38 keeps the guide component 3 in a straight position, meaning the guide shaft has zero travel within the guide sleeve.

[0026] The guide sleeve 31 has a set of ear plates at its upper and lower ends in four directions, namely longitudinal and transverse, and the ear plates are provided with waist-shaped holes.

[0027] like Figure 4 As shown, the stamping component 6 includes a body 61, with a stamping block 62 at one end and a second universal ball bearing 63 at the other end. The stamping component 6 is at the same height as the guide component 3 in its straightened state.

[0028] The second universal ball bearing 63 is opposite to the upper base, and the stamping block 62 is opposite to the flat part 4 that needs to be stamped into a folded paper structure. The stamping component has a set of ear plates in each of the four longitudinal and transverse directions, flush with the first ear plate on the guide component 3. The ear plates have oblong holes. The ear plates of the guide component 3 and the ear plates of the stamping component 6 are connected by a connecting rod component 7, ensuring that the connecting rod component 7 remains horizontal in its initial natural state.

[0029] Each adjacent guide component and stamping component is connected by two connecting rod components at the top and bottom, which can increase its motion stability.

[0030] To adjust the length of the beveled edge of the formed origami, the connecting rod component 7 can be configured as a length-adjustable structure, including a connecting rod shaft 71, a connecting rod sleeve 72, and a locking nut 74. The connecting rod shaft 71 is connected to the connecting rod sleeve 72 and fixed by the locking nut 74. By adjusting the fixed position of the connecting rod shaft 71 and the connecting rod sleeve 72, the length of the connecting rod component 7 can be adjusted so that the length of the connecting rod component is the same as the length of the beveled edge of the formed origami. Further, as... Figure 5 As shown, a hinge head 73 can be provided on the side of the connecting rod shaft 71 away from the connecting rod sleeve. The connecting rod shaft 71 is a stepped shaft, including a stepped head and a threaded section. The stepped head is fitted into the hinge head 73, and there is a gap between the hinge head 73 and the stepped head, allowing relative rotation. After positioning, it is fixed by a lock nut. The threaded section of the connecting rod shaft 71 is threadedly connected to the connecting rod sleeve 72. The length of the connecting rod component is adjusted by rotating the connecting rod shaft, and then the lock nut is tightened, thereby adapting to origami parts with different stamping bevel lengths.

[0031] The hinge head 73 and the connecting rod sleeve 72 are each provided with an end plate at their ends. The end plate has a round hole for connecting to the oblong holes on the ear plates of adjacent guide components and stamping components via pins and fixing nuts, respectively. Figure 6 As shown. The oblong hole on the ear plate is for controlling the rotation center position of the connecting rod assembly, ensuring that the rotation center of the connecting rod assembly is on the same vertical line as the bending point of the inclined side of the origami structure, as shown. Figure 10 This forms a parallelogram.

[0032] Furthermore, bolt holes are provided on the end faces of the top block 33 of the guide component and the stamping block 62 of the stamping component for connecting stamping heads 8 of the same size and thickness, so as to facilitate the stamping of flat parts 4 with different lattice sizes.

[0033] The lower stamping unit has the same structure as the upper stamping unit, also including several guide components 3 and several stamping components 6. The guide components 3 and several stamping components 6 are arranged in a two-dimensional staggered array, distributed in a checkerboard pattern. That is, the guide components 3 are connected to the stamping components 6 in the longitudinal and transverse directions, respectively, and the stamping components 6 are connected to the guide components 3 in the longitudinal and transverse directions, respectively.

[0034] The lower stamping unit is arranged opposite to the upper stamping unit. Specifically, the first universal ball bearing 37 of the guide component in the lower stamping unit faces the lower base, and the top block 33 faces the flat part 4 to be stamped into a folded paper structure. The second universal ball bearing 63 of the stamping component faces the lower base, and the stamping block 62 faces the flat part 4 to be stamped into a folded paper structure. Furthermore, the top block of the lower guide component faces the stamping block of the upper stamping component, and the stamping block of the lower stamping component faces the top block of the upper guide component. Figure 7 As shown.

[0035] The stamping mechanism, consisting of the upper and lower stamping components, is arranged in pairs, with the top block 33 of the vertical guide component 3 and the stamping block 62 of the stamping component 6 facing each other vertically. A flat plate part 4, to be stamped into a folded paper structure, is placed in the middle. The flat plate part 4 is laser-cut, with several squares cut out according to a pattern to form square holes. Notches are provided at the four corners of each square hole as stress relief grooves during stamping and bending. Limiting plates 5 are installed around the flat plate part 4. These limiting plates 5 are respectively installed on the outer surface of the stamping components on the outer periphery of the stamping mechanism and connected via threaded holes to restrict the movement of the flat plate part 4 during stamping.

[0036] like Figure 8-9 As shown, during stamping, the stamping mechanism is subjected to stamping force. The guide component 3, due to the presence of the guide shaft 32 and spring, will be compressed as the pressure plate presses. The stamping component is a rigid structure and cannot be shortened. The adjacent guide components and stamping components connected by the connecting rod component form a height difference. Under the pivoting action of the connecting rod component 7, the movement between the guide component and the stamping component is decomposed into vertical movement and horizontal movement, causing the flat part 4 to bend and form the required origami structure.

[0037] In this invention, the guide component and the stamping component are each equipped with a universal ball bearing at their ends relative to the upper and lower bases. They are connected by a connecting rod to ensure their relative position. Because the guide component is a telescopic structure, a height difference between the guide component and the stamping component during the stamping process causes the connecting rod to rotate, thereby driving the flat part to undergo vertical and planar displacement, forming a folded paper structure. This invention, through its unique connecting rod component and upper and lower stamping surface bearing design, achieves vertical and internal horizontal movement of the flat part, enabling the flat part to be stamped and bent into a folded paper structure.

[0038] The method of using the origami structure stamping and bending forming device of the present invention includes the following steps: (1) Design the dimensions of the origami structure according to the required dimensions, and obtain the flat parts that need to be stamped into the origami structure according to the origami structure design dimensions; set the stroke of the guide component and the length of the connecting rod component based on the bevel and thickness of the origami structure; (2) Place the connected lower stamping unit onto the lower base, and place the cut flat parts that need to be stamped into a folded paper structure on the lower stamping unit; place the connected upper stamping unit on the flat parts, and then cover the upper base on the upper stamping unit. The pressure plate is connected to the hydraulic press. During stamping, the pressure plate moves downward to contact the upper base. (3) Turn on the hydraulic press and control the pressure plate to slowly press the upper base until the maximum stroke of the guide component is reached; you can judge whether the pressing has reached the required position by stopping the movement of the pressure plate or by observing the pressure gauge continuously increasing. (4) Lift the pressure plate and take out the stamped and bent origami structure; the guide component returns to its original shape under the action of spring force.

[0039] The entire operation process of this invention takes very little time and is highly efficient.

[0040] When adapting origami parts with different lattice sizes, different sized punch heads 8 are installed in the pre-drilled holes at the top block of the guide component and the end of the punch block of the punching component. At this time, it is necessary to adjust the length of the connecting rod component and the position of the rotation center of the connecting rod so that the effective length of the connecting rod component is the same as the length of the hypotenuse of the origami structure, that is, length a is always equal to length c, and the rotation center and the edge of the punch head are on the same vertical line. Figure 10 As shown, this ensures that the connecting rod structure forms a parallelogram with the hypotenuse of the folding structure during stamping, thus smoothly completing the stamping process.

Claims

1. A stamping and bending forming device for origami structures, characterized in that, The system comprises, from top to bottom, a pressure plate, an upper base, an upper stamping unit, a flat plate part, a lower stamping unit, and a lower base. The upper stamping unit includes several guide components and several stamping components arranged in a two-dimensional staggered array, forming a checkerboard pattern. Adjacent guide components and stamping components are pivotally connected via connecting rods. The lower stamping unit has the same structure as the upper stamping unit, with its guide components and stamping components positioned opposite to the stamping components and guide components of the upper stamping unit. The guide components are telescopic structures, configured to be in a straight state when not stamped, and the stamping components are at the same height as the straightened guide components. During stamping, the guide components shorten, creating a height difference with adjacent stamping components. Under the pivoting action of the connecting rods, the upper and lower stamping units stamp and bend the flat plate part to form a folded paper structure.

2. The origami structure stamping and bending forming device according to claim 1, characterized in that, The guiding component includes a guide sleeve and a guide shaft. The guide sleeve has a top block on the side away from the guide shaft. The top block has an adjusting screw with a free end that passes through the top block and the end of the guide sleeve for adjusting the stroke of the guide shaft. The guide shaft has a bushing on the end away from the guide sleeve. The bushing has a first universal ball bearing at its end. A spring is provided between the bushing and the guide sleeve.

3. The origami structure stamping and bending forming device according to claim 1, characterized in that, Adjacent guide components and stamping components are connected by two connecting rod components at the top and bottom.

4. The origami structure stamping and bending forming device according to claim 1, characterized in that, The connecting rod component is an adjustable sleeve structure, including a connecting rod shaft, a connecting rod sleeve, and a lock nut. The connecting rod shaft and the connecting rod sleeve are threaded together and fixed by the lock nut. The length of the connecting rod component is adjusted by adjusting the fixed position of the connecting rod shaft and the connecting rod sleeve, so that the length of the connecting rod component is the same as the length of the hypotenuse of the origami structure.

5. The origami structure stamping and bending forming device according to claim 1, characterized in that, Both the guide component and the stamping component have bolt holes pre-drilled on their end faces relative to the flat plate part for connecting stamping heads of different sizes.

6. The origami structure stamping and bending forming device according to claim 1, characterized in that, The flat part is pre-cut into square holes according to the origami structure design dimensions, and notches are set at the four corners of each square hole as stress relief grooves during stamping and bending.

7. The origami structure stamping and bending forming device according to claim 1, characterized in that, The pressure plate is connected to the drive mechanism, which provides stamping force to the origami structure stamping and bending forming device.

8. The origami structure stamping and bending forming device according to claim 7, characterized in that, The pressure plate, upper base, upper stamping unit, flat plate part, lower stamping unit, and lower base are pressed together under the action of the driving mechanism.

9. The origami structure stamping and bending forming device according to claim 1, characterized in that, The guide component and the stamping component are provided with universal ball bearings at their ends relative to the upper base and / or the lower base.

10. A method of using the origami structure stamping and bending forming device according to any one of claims 1-9, characterized in that, Includes the following steps: (1) Design the dimensions of the origami structure according to the required dimensions, and obtain the flat parts that need to be stamped into the origami structure according to the origami structure design dimensions; set the stroke of the guide component and the length of the connecting rod component based on the bevel and thickness of the origami structure; (2) Place the connected lower stamping unit onto the lower base, and place the cut flat parts that need to be stamped into a folded paper structure on the lower stamping unit; place the connected upper stamping unit on the flat parts, and then cover the upper base on the upper stamping unit. The pressure plate is connected to the hydraulic press. During stamping, the pressure plate moves downward to contact the upper base. (3) Turn on the hydraulic press and control the pressure plate to press the upper base until the maximum stroke of the guide component is reached, so that the flat part is stamped and bent into a paper-folding structure.

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