Rotatable 3D printed structure and 3D printing assembly comprising the same

Abstract

The utility model provides a rotatable 3D printing structure and 3D printing assembly containing it. The rotatable 3D printing structure includes: multiple frames, multiple frames are sequentially sleeved from inside to outside, and any one of adjacent two frames can rotate relative to another; the pivot joint structure includes the first pivot joint and the second pivot joint, the first pivot joint and the second pivot joint are arranged on the adjacent two frames respectively, and the first pivot joint and the second pivot joint are used for the rotation of any one of adjacent two frames relative to another; the body, the outer periphery of the body is fixedly connected with the inner wall of the frame located in the innermost side. By setting multiple frames sequentially sleeved from inside to outside, and by setting the first pivot joint and the second pivot joint on the adjacent two frames respectively, the rotation of any one of adjacent two frames relative to another can be realized, so that the rotatability of the 3D printing structure itself is realized.

Description

Technical Field

[0001] This utility model relates to a rotatable 3D printed structure and a 3D printed component comprising the same. Background Technology

[0002] Currently, additive manufacturing (3D printing) technology is widely used in aerospace, automotive, military, and medical fields. Metal additive manufacturing uses a three-dimensional digital model as a basis, creating solid parts from raw materials such as metal powder through a layer-by-layer manufacturing and stacking process. Its core concept is "addition rather than removal," that is, building three-dimensional objects by stacking materials layer by layer, which is fundamentally different from traditional subtractive manufacturing methods (such as cutting or removing material). Metal additive manufacturing technology has the following significant characteristics:

[0003] 1. Highly flexible: Capable of quickly manufacturing complex-shaped metal parts to meet personalized and customized needs;

[0004] 2. High material utilization rate: By precisely controlling the addition of materials, material waste is reduced and costs are lowered;

[0005] 3. Superior performance: The manufactured metal parts have high strength, high precision and good surface quality.

[0006] However, determining the appropriate structure to enable the rotatability of 3D printed structures is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned technical problems in the prior art and provide a rotatable 3D printed structure and a 3D printed component including the same.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A rotatable 3D printed structure, characterized in that it comprises:

[0010] Multiple frames are nested and connected from the inside out, and any one of two adjacent frames can rotate relative to the other.

[0011] A pivot structure, comprising a first pivot portion and a second pivot portion, wherein the first pivot portion and the second pivot portion are respectively disposed on two adjacent frames, and the first pivot portion and the second pivot portion cooperate with each other for rotation of one of the two adjacent frames relative to the other.

[0012] The body, the outer periphery of which is fixedly connected to the inner wall of the frame located on the innermost side.

[0013] In this technical solution, by setting multiple frames nested sequentially from the inside out, and by setting a first pivot and a second pivot on two adjacent frames respectively, it is possible to rotate any one of the two adjacent frames relative to the other, thereby realizing the rotatability of the 3D printed structure itself.

[0014] Preferably, two sets of pivot structures are provided between two adjacent frames. The two sets of pivot structures are located on opposite sides of the two frames, and the center lines of the two sets of pivot structures coincide, forming the rotation axis of the two adjacent frames.

[0015] In this technical solution, by setting two sets of pivoting structures located on opposite sides of two adjacent frames along the rotation axis, the two adjacent frames can rotate along the same rotation axis, that is, the two adjacent frames rotate coaxially.

[0016] Preferably, one of the first pivot portion and the second pivot portion is a protrusion and the other is a groove, the shape of the groove matching the shape of the protrusion.

[0017] In this technical solution, the specific structures of the first pivot portion and the second pivot portion are provided through the above-described configuration.

[0018] Preferably, the distance between the outer side of the protrusion and the inner wall of the groove is 0.2mm-0.4mm.

[0019] In this technical solution, by setting the range of the distance between the outer side of the protrusion and the inner wall of the groove, on the one hand, the distance is avoided from being too small, which would affect the rotation of the two adjacent frames; on the other hand, the distance is avoided from being too large, which would prevent the relative fixation of the two adjacent frames from being achieved.

[0020] Preferably, the protrusion is a cone with a cone angle of 30-40 degrees and a diameter of 0.6mm-1.2mm; or,

[0021] The protrusion is a cylinder with a diameter of 0.6mm-1.2mm and a length of 0.8-1.2mm; or,

[0022] The protrusion is a cuboid with a length of 0.5mm-1.2mm, a width of 0.5mm-1.2mm, and a height of 0.8mm-1.2mm.

[0023] Preferably, the body has a mesh structure.

[0024] In this technical solution, by setting the body as a mesh structure, the weight of the body itself is reduced, thereby achieving cost reduction and efficiency improvement.

[0025] Preferably, the mesh structure includes a plurality of mesh openings arranged in a dot matrix; the dot matrix is ​​a uniform dot matrix; or, the dot matrix is ​​a field-driven dot matrix; and / or,

[0026] The mesh structure has the same pattern on both sides along the thickness direction.

[0027] In this technical solution, the use of a uniform lattice structure can achieve a weight reduction of up to 90%, resulting in cost reduction and efficiency improvement. The field-driven lattice structure can better distribute materials, enabling the structure to achieve maximum stiffness and minimum weight. By setting the mesh structure with the same pattern on both sides along the thickness direction, a supportless stacked printing process can be achieved, thus avoiding damage to the main body caused by removing supports. This is because if the patterns on both sides along the thickness direction (i.e., the top and bottom surfaces of the 3D printed structure along the height direction of the 3D printed component below) are different, supports need to be added. After the part is printed, the supports need to be removed, which will result in rough parts and may also damage the lattice structure. Therefore, if a stacked printing process is used, having identical patterns on the top and bottom surfaces of the model is the best choice.

[0028] Preferably, the frame is a ring structure; and / or, the number of frames is greater than or equal to three.

[0029] In this technical solution, by setting the frame as a ring structure, the rotational stability of the frame can be improved, and the structural strength itself can be increased. By setting the number of frames to three or more, relative rotation of multiple frames can be achieved.

[0030] Preferably, the 3D printed structure is integrally formed by 3D printing; and / or, the material of the 3D printed structure is metal.

[0031] A 3D printed component, characterized in that the 3D printed component includes a plurality of rotatable 3D printed structures as described above, which are stacked sequentially, and a positioning groove is formed between two adjacent 3D printed structures.

[0032] The 3D printed components are formed in one piece through 3D printing.

[0033] In this technical solution, by setting a positioning groove between two adjacent 3D printed structures, it is convenient to divide the 3D printed component formed by 3D printing into multiple independent 3D printed structures according to the positioning groove.

[0034] The positive and progressive effects of this utility model are as follows:

[0035] This invention achieves the rotatability of the 3D printed structure by setting multiple frames nested from the inside out and by setting a first pivot and a second pivot on two adjacent frames respectively. This allows one of the two adjacent frames to rotate relative to the other. Attached Figure Description

[0036] Figure 1 This is a front view schematic diagram of a rotatable 3D printed structure according to a preferred embodiment of the present invention.

[0037] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0038] Figure 3 This is a schematic diagram of the pivot structure of a preferred embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram (I) of the main body of a preferred embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram (I) of a preferred embodiment of the 3D printed structure of the present invention.

[0041] Figure 6 This is a schematic diagram (II) of the structure of the main body of a preferred embodiment of the present invention.

[0042] Figure 7 This is a schematic diagram (II) of the 3D printing structure of a preferred embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram (III) of the main body of a preferred embodiment of the present invention.

[0044] Figure 9 This is a schematic diagram (III) of a preferred embodiment of the 3D printed structure of the present invention.

[0045] Figure 10 This is a side view of a preferred embodiment of the rotatable 3D printed structure of the present invention.

[0046] Figure 11 This is a side view of a 3D printed component according to a preferred embodiment of the present invention.

[0047] Explanation of reference numerals in the attached figures

[0048] 3D Printed Components 100

[0049] Rotatable 3D Printed Structure 1

[0050] Frame 10

[0051] First Framework 11

[0052] Second Frame 12

[0053] Third Framework 13

[0054] Pivot structure 20

[0055] First pivot section 21

[0056] Second pivot part 22

[0057] Body 30

[0058] 31 mesh

[0059] Pattern 32

[0060] Positioning slot 2

[0061] included angle α

[0062] The cone angle β of the cone

[0063] The diameter d of the cone

[0064] The distance t between the outer side of the protrusion and the inner wall of the groove

[0065] First axis of rotation P1

[0066] Second axis of rotation P2 Detailed Implementation

[0067] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0068] In the description of this utility model, 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", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0070] like Figures 1 to 3 As shown, this embodiment provides a rotatable 3D printed structure 1, which includes: multiple frames 10, a pivot structure 20 and a body 30.

[0071] Multiple frames 10 are nested and connected from the inside out, and any one of two adjacent frames 10 can rotate relative to the other.

[0072] The pivot structure 20 includes a first pivot part 21 and a second pivot part 22. The first pivot part 21 and the second pivot part 22 are respectively disposed on two adjacent frames 10, and the first pivot part 21 and the second pivot part 22 cooperate with each other for rotation of one of the two adjacent frames 10 relative to the other.

[0073] The outer periphery of the main body 30 is fixedly connected to the inner wall of the innermost frame 10.

[0074] In this way, by setting multiple frames 10 nested sequentially from the inside out, and by setting a first pivot 21 and a second pivot 22 on two adjacent frames 10 respectively, it is possible to rotate any one of the two adjacent frames 10 relative to the other, thereby realizing the rotatability of the 3D printed structure 1 itself.

[0075] Preferably, the number of frames 10 is greater than or equal to three, thereby enabling relative rotation of the multiple frames 10. Specifically, in this embodiment, the number of frames 10 is three, and the three frames 10 are sequentially nested and connected from the inside to the outside. The three frames 10 are respectively referred to as the first frame 11, the second frame 12, and the third frame 13 from the inside to the outside.

[0076] Preferably, two sets of pivot structures 20 are provided between two adjacent frames 10. The two sets of pivot structures 20 are located on opposite sides of the two frames 10, and the center lines of the two sets of pivot structures 20 coincide, forming the rotation axis of the two adjacent frames 10. In this way, by setting two sets of pivot structures 20 on opposite sides of the two adjacent frames 10 along the rotation axis, the two adjacent frames 10 can rotate along the same rotation axis, that is, the two adjacent frames 10 rotate coaxially.

[0077] Specifically, in this embodiment, the rotation axis formed by the two sets of pivot structures 20 between the first frame 11 and the second frame 12 is the first rotation axis P1, and the rotation axis formed by the two sets of pivot structures 20 between the second frame 12 and the third frame 13 is the second rotation axis P2. An angle α is formed between the first rotation axis P1 and the second rotation axis P2, with the angle α ranging from 0 degrees to 90 degrees. In this embodiment, the angle α between the first rotation axis P1 and the second rotation axis P2 is 90 degrees.

[0078] Preferably, one of the first pivot portion 21 and the second pivot portion 22 is a protrusion, and the other is a groove, with the shape of the groove matching the shape of the protrusion. That is, the first pivot portion 21 is a protrusion, and the second pivot portion 22 is a groove; or, the first pivot portion 21 is a groove, and the second pivot portion 22 is a protrusion. In this embodiment, the first pivot portion 21 is a protrusion, and the second pivot portion 22 is a groove.

[0079] Preferably, the distance t between the outer side of the protrusion and the inner wall of the groove is 0.2mm-0.4mm.

[0080] In this way, by setting the range of the distance t between the outer side of the protrusion and the inner wall of the groove, on the one hand, the distance t is avoided from being too small, which would affect the rotation of the two adjacent frames 10; on the other hand, the distance t is avoided from being too large, which would prevent the relative fixation of the two adjacent frames 10 from being achieved.

[0081] In this embodiment, the protrusion is a cone with a cone angle β of 30-40 degrees and a diameter d of 0.6mm-1.2mm. However, it is not limited to this. In other embodiments, the protrusion is a cylinder with a diameter of 0.6mm-1.2mm and a length of 0.8-1.2mm; or, the protrusion is a cuboid with a length of 0.5mm-1.2mm, a width of 0.5mm-1.2mm, and a height of 0.8mm-1.2mm.

[0082] Preferably, the frame 10 is a ring structure. By making the frame 10 a ring structure, the rotational stability of the frame 10 can be improved, and its structural strength can be increased. However, this is not a limitation; in other embodiments, the frame 10 may have other shapes.

[0083] In this embodiment, the body 30 has a mesh structure to reduce its own weight and achieve cost reduction and efficiency improvement.

[0084] like Figure 4 , Figure 6 and Figure 8As shown, the mesh structure includes multiple mesh openings 31 arranged in a lattice; the lattice is a uniform lattice; or, the lattice is a field-driven lattice. Thus, the use of a uniform lattice structure can achieve a maximum weight reduction of 90%, realizing cost reduction and efficiency improvement; the field-driven lattice structure can better distribute materials, enabling the structure to achieve maximum stiffness and minimum weight. It should be noted that a field-driven lattice refers to a lattice generated under the driving force of a geometric field, where the geometric field can be a point, a straight line, or a three-dimensional model. That is, to make the lattice change with the geometric body, the geometric body can be regarded as a field, and the distance of the lattice from the geometric body can be regarded as a variable. This can be set; the farther away from the geometric body, the larger the lattice line diameter, thus forming a lattice structure where the lattice line diameter changes with the geometric field.

[0085] Lattice structures include, but are not limited to, BCC, FCC, Diamond, Fluorite, and Octet. BCC stands for Body-Centered Cubic; FCC stands for Face-Centered Cubic; Diamond stands for Diamond Structure; Fluorite stands for Fluorite Structure; and Octet stands for Octahedral Structure. These are all lattice structure types. BCC and FCC lattices are uniform lattices.

[0086] like Figure 5 , Figure 7 and Figure 9 As shown, the mesh structure has the same pattern 32 on both sides along the thickness direction. By setting the mesh structure to have the same pattern 32 on both sides along the thickness direction, a supportless stacked printing process can be achieved, thereby avoiding damage to the main body 30 caused by removing supports. This is because if the patterns 32 on both sides along the thickness direction (i.e., the top and bottom surfaces of the 3D printed structure 1 along the height direction of the 3D printed component 100 below) are different, supports need to be added, and the supports need to be removed after the part is printed. Removing supports will result in rough parts and may also damage the lattice structure. Therefore, if a stacked printing process is used, it is best to have the same pattern 32 on the top and bottom surfaces of the model. This pattern 32 is for a wind power model, but it is not limited to this; it can also be for a photovoltaic model, an energy storage model, or a hydrogen energy model.

[0087] For details, please refer to the following: Figure 4 The lattice is a uniform lattice; please refer to the following: Figure 5 Pattern 32 is added to a uniformly dotted mesh structure. Please refer to [reference needed]. Figure 6The lattice in the diagram is a field-driven lattice, with the field being the central origin of the body 30. Please refer to the diagram for further details. Figure 7 Pattern 32 added to Figure 6 On the network structure. Please refer to [the document / reference]. Figure 8 The lattice in the figure is also a field-driven lattice, where the field is... Figure 9 Pattern 32 in the diagram. However, it is not limited to this; in other embodiments, the field can also be the X-axis or the Y-axis.

[0088] Preferably, the 3D printed structure 1 is integrally formed by 3D printing; the material of the 3D printed structure 1 is metal. The 3D printed structure 1 is formed by LBPF metal 3D printing, which can greatly improve production efficiency. Among them, LBPF refers to Laser Powder Bed Fusion technology.

[0089] like Figure 10 As shown, this embodiment also provides a 3D printed component 100, which includes a plurality of rotatable 3D printed structures 1 stacked sequentially as described above, and a positioning groove 2 is formed between two adjacent 3D printed structures 1; the 3D printed component 100 is integrally formed by 3D printing.

[0090] In this way, by setting a positioning groove 2 between two adjacent 3D printed structures 1, it is convenient to divide the 3D printed component 100 formed as a single unit through 3D printing, thereby dividing the 3D printed component 100 into multiple independent 3D printed structures 1 according to the positioning groove 2, such as... Figure 11 As shown. By setting the 3D printing component 100 to be formed in one piece through 3D printing, multiple layers of parts can be printed at once, greatly reducing costs and increasing efficiency.

[0091] Along the height direction of the 3D printed component 100 (i.e., the thickness direction of the 3D printed structure 1), each 3D printed structure 1 in the 3D printed component 100 has a 0.2mm bottom allowance; this 0.2mm bottom allowance is the wire cutting allowance, and this part of the material will be removed during wire cutting. The positioning groove 2 has a size of 0.2mm * 0.2mm (height * depth); the 0.2 * 0.2mm groove is used for wire cutting positioning, so that the 3D printed component 100 can realize post-processing such as stacked printing and wire cutting.

[0092] The rotatable 3D printed structure 1 and the 3D printed component 100 containing it in this embodiment achieve the rotatability of the 3D printed structure 1 by setting multiple frames 10 sequentially nested from the inside to the outside in the 3D printed structure 1, and by setting a first pivot 21 and a second pivot 22 on two adjacent frames 10 respectively, thereby enabling the rotation of any one of the two adjacent frames 10 relative to the other.

[0093] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A rotatable 3D printed structure, characterized in that, It includes: Multiple frames are nested and connected from the inside out, and any one of two adjacent frames can rotate relative to the other. A pivot structure, comprising a first pivot portion and a second pivot portion, wherein the first pivot portion and the second pivot portion are respectively disposed on two adjacent frames, and the first pivot portion and the second pivot portion cooperate with each other for rotation of one of the two adjacent frames relative to the other. The body, the outer periphery of which is fixedly connected to the inner wall of the frame located on the innermost side.

2. The rotatable 3D printed structure as described in claim 1, characterized in that, Two sets of pivot structures are provided between two adjacent frames. The two sets of pivot structures are located on opposite sides of the two frames, and the center lines of the two sets of pivot structures coincide, forming the rotation axis of the two adjacent frames.

3. The rotatable 3D printed structure as described in claim 1, characterized in that, One of the first pivot portion and the second pivot portion is a protrusion and the other is a groove, the shape of the groove matching the shape of the protrusion.

4. The rotatable 3D printed structure as described in claim 3, characterized in that, The distance between the outer side of the protrusion and the inner wall of the groove is 0.2mm-0.4mm.

5. The rotatable 3D printed structure as described in claim 3, characterized in that, The protrusion is a cone with a cone angle of 30-40 degrees and a diameter of 0.6mm-1.2mm; or, The protrusion is a cylinder with a diameter of 0.6mm-1.2mm and a length of 0.8-1.2mm; or, The protrusion is a cuboid with a length of 0.5mm-1.2mm, a width of 0.5mm-1.2mm, and a height of 0.8mm-1.2mm.

6. The rotatable 3D printed structure as described in claim 1, characterized in that, The body has a mesh structure.

7. The rotatable 3D printed structure as described in claim 6, characterized in that, The mesh structure includes multiple mesh openings arranged in a dot matrix; the dot matrix is ​​a uniform dot matrix; or, the dot matrix is ​​a field-driven dot matrix. And / or, The mesh structure has the same pattern on both sides along the thickness direction.

8. The rotatable 3D printed structure as described in claim 1, characterized in that, The frame is a ring structure; and / or, the number of the frames is greater than or equal to three.

9. The rotatable 3D printed structure as described in any one of claims 1-8, characterized in that, The 3D printed structure is integrally formed by 3D printing; and / or, the material of the 3D printed structure is metal.

10. A 3D printed component, characterized in that, The 3D printed component includes a plurality of rotatable 3D printed structures as described in any one of claims 1-9, which are stacked sequentially, and a positioning groove is formed between two adjacent 3D printed structures. The 3D printed components are formed in one piece through 3D printing.

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