3D printing platform

Abstract

The 3D printing platform comprises a printing table, a heating layer and a plurality of connecting profiles, the printing table is arranged on the connecting profiles, the 3D printing platform further comprises a connecting piece, an elastic piece and a rolling piece, the connecting piece is sleeved with the rolling piece, a through hole is formed in the elastic piece, the connecting piece is sleeved with the elastic piece, and the lower portion of the elastic piece is arranged on the rolling piece; a first displacement gap exists between the periphery of the connecting piece and the through hole, the upper end of the connecting piece penetrates through the connecting profile from bottom to top and then is connected with the printing table, a second displacement gap exists between the periphery of the connecting piece and the connecting profile, and the upper portion of the elastic piece abuts against the connecting profile; according to the 3D printing platform, when the printing table is heated to expand, the printing table can drive the connecting piece and the rolling piece to horizontally move in the horizontal direction, and the printing table can drive the connecting piece and the rolling piece to vertically move in the vertical direction, so that the elastic piece is compressed, the stress and strain of the printing table are released, and the stability, the printing precision and the normal service life of the printing table are kept.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a 3D printing platform. Background Art

[0002] A 3D printer is a machine using rapid prototyping technology that can construct three-dimensional objects using materials such as plastic by stacking them layer by layer. The existing 3D printer platform is shown in Chinese utility model CN220594087U, title: a 3D printing platform, authorization announcement date: March 15, 2024, which includes a substrate, a heating layer, a thermal insulation layer and a base arranged in sequence from top to bottom. The substrate is a porous metal plate evenly and densely covered with adhesive through holes, and the adhesive through holes penetrate the substrate. The heating layer is used to heat the substrate, and the thermal insulation layer is used to ensure that heat is conducted to the substrate and prevent excessive heat from being conducted to the base. The substrate of the 3D printing platform of the utility model is a porous structure, and the support layer can be specifically designed to adhere to different holes, thereby adjusting the bonding strength between the printing material and the substrate, and there is no need to apply a layer of glue to fix the model, which can prevent printing warping and deformation, and can also easily separate the model from the printing platform.

[0003] However, the 3D printing platform of the above structure still has the following shortcomings: (1) During the 3D printing process, stress will be generated when the substrate expands due to heat. If the stress is not released, the stress will accumulate on the substrate. Long-term stress accumulation will cause the substrate to expand and deform, affecting the stability of the substrate during operation and the printing accuracy. (2) Long-term stress accumulation can also easily lead to material fatigue of the substrate and cause other components connected to the substrate (such as connecting screws) to bear a large load, thereby reducing the service life of the substrate and other components. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a 3D printing platform that can release the stress generated during the printing process, maintain the stability and printing accuracy of the printing table, and at the same time well ensure the normal service life of the printing table and connecting parts.

[0005] The object of the present invention is achieved in that: A 3D printing platform comprises a printing table, a heating layer arranged at the bottom of the printing table and a plurality of connecting profiles, wherein the printing table is placed on the plurality of connecting profiles and is characterized in that it also comprises a connecting member, an elastic member and a rolling member, wherein the rolling member is sleeved on the outer periphery of the connecting member, a through hole is opened on the elastic member, the elastic member is sleeved on the outer periphery of the connecting member and the lower part of the elastic member is placed on the rolling member, a first displacement gap exists between the outer periphery of the connecting member and the through hole of the elastic member, the upper end of the connecting member passes through the connecting profile from bottom to top and is connected to the printing table, and a second displacement gap exists between the outer periphery of the connecting member and the connecting profile, and the upper part of the elastic member abuts against the connecting profile.

[0006] The purpose of the present invention can also be solved by the following technical measures: Specifically, the connecting member is a connecting bolt, and a first flat washer is sleeved on the lower part of the connecting bolt. The rolling member is sleeved on the lower periphery of the connecting bolt and the rolling member is placed on the first flat washer. The upper part of the connecting bolt passes through the connecting profile and is threadedly connected to the printing table.

[0007] Specifically, a connecting plate is fixedly connected to the bottom of the printing table, a connecting screw hole is opened on the connecting plate, and the upper part of the connecting bolt is threadedly connected to the connecting screw hole.

[0008] Specifically, the printing table is made of aluminum alloy material, and the connecting plate is made of carbon steel material.

[0009] Specifically, the elastic member is a butterfly spring, and second flat washers are provided on the upper and lower surfaces of the butterfly spring. The second flat washer located on the upper surface of the butterfly spring abuts against the connecting profile, and the second flat washer located on the lower surface of the butterfly spring abuts against the rolling member.

[0010] Specifically further, the rolling element is a thrust ball bearing.

[0011] Specifically, a heat insulation board is further arranged between the connecting profile and the printing table, and an avoidance through hole is opened on the heat insulation board for the connecting member to pass through, and a third displacement gap exists between the outer periphery of the connecting member and the avoidance through hole.

[0012] More specifically, the thermal insulation board is a fiberglass board.

[0013] Specifically, the two ends of the lower part of the printing table are connected with the connecting profiles.

[0014] The beneficial effects of the present invention are as follows: (1) In this 3D printing platform, when the printing table is heated and expanded, the printing table will drive the connecting parts and rolling parts to move horizontally in the horizontal direction, and will drive the connecting parts and rolling parts to move vertically in the vertical direction, thereby compressing the elastic parts to release the stress and strain of the printing table, maintain the stability and printing accuracy of the printing table, and at the same time well ensure the service life of the printing table; in addition, by arranging an elastic part between the connecting part and the connecting profile to limit the locking force of the connecting part, the connecting part and the connecting profile are not completely locked, which is beneficial to the vertical displacement of the connecting part and the rolling part, and at the same time can well prevent the connecting part from being subjected to excessive load, thereby ensuring the service life of the connecting part; in addition, by arranging a rolling part between the connecting part and the elastic part to reduce the friction between the connecting part and the elastic part, it is beneficial to the horizontal displacement of the connecting part.

[0015] (2) The connecting bolts are easy to obtain, and can play a good role in connecting the printing table and the connecting profile. The first flat washer provides a mounting carrier for the rolling element on the connecting bolt, which is conducive to the stable operation of the rolling element.

[0016] (3) The butterfly spring achieves stability against the connecting profile and the rolling element through the second flat washers on its upper and lower surfaces. At the same time, the butterfly spring has a small height and a compact structure, which can well achieve the purpose of this patent, namely: limiting the locking force of the connecting element so that the connecting element and the connecting profile are not completely locked, which is conducive to the sliding of the connecting element and the rolling element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the 3D printing platform of the present invention.

[0018] Figure 2 for Figure 1 AA section view.

[0019] Figure 3 for Figure 2 Enlarged view of point B. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Example, combined with Figures 1 to 3As shown, a 3D printing platform comprises a printing table 1, a heating layer 2 arranged at the bottom of the printing table 1 and a plurality of connecting profiles 3, wherein the printing table 1 is placed on the plurality of connecting profiles 3, and is characterized in that it also comprises a connecting member 4, an elastic member 5 and a rolling member 6, wherein the rolling member 6 is sleeved on the outer periphery of the connecting member 4, a through hole 51 is opened on the elastic member 5, the elastic member 5 is sleeved on the outer periphery of the connecting member 4 and the lower part of the elastic member 5 is placed on the rolling member 6, a first displacement gap 100 exists between the outer periphery of the connecting member 4 and the through hole 51 of the elastic member 5, the upper end of the connecting member 4 passes through the connecting profile 3 from bottom to top and is connected to the printing table 1, and a second displacement gap 200 exists between the outer periphery of the connecting member 4 and the connecting profile 3, and the upper part of the elastic member 5 abuts against the connecting profile 3; in this 3D printing platform, when the printing table 1 is heated and expanded, In the horizontal direction, the printing table 1 will drive the connecting member 4 and the rolling member 6 to move horizontally. In the vertical direction, the printing table 1 will drive the connecting member 4 and the rolling member 6 to move vertically, and then compress the elastic member 5 to release the stress and strain of the printing table 1, maintain the stability and printing accuracy of the printing table 1, and at the same time well guarantee the service life of the printing table 1; furthermore, by arranging the elastic member 5 between the connecting member 4 and the connecting profile 3 to limit the locking force of the connecting member 4, the connecting member 4 and the connecting profile 3 are not completely locked, which is beneficial to the vertical displacement of the connecting member 4 and the rolling member 6, and at the same time can well prevent the connecting member 4 from being subjected to excessive load, thereby ensuring the service life of the connecting member 4; furthermore, by arranging the rolling member 6 between the connecting member 4 and the elastic member 5 to reduce the friction between the connecting member 4 and the elastic member 5, it is beneficial to the horizontal displacement of the connecting member 4.

[0021] In the present embodiment, the printing table 1 is a thin plate with large length and width. Therefore, when the printing table 1 is heated and expanded, the deformation in the horizontal direction is more obvious than that in the vertical direction. The main direction of stress release of the printing table 1 is the horizontal direction, and the stress release in the vertical direction is relatively small; that is, the displacement of the printing table 1 in the horizontal direction is larger, and the displacement in the vertical direction is smaller.

[0022] As a specific solution, the connecting member 4 is a connecting bolt, and a first flat washer 41 is also sleeved on the lower part of the connecting bolt. The rolling member 6 is sleeved on the lower periphery of the connecting bolt and the rolling member 6 is placed on the first flat washer 41. The upper part of the connecting bolt passes through the connecting profile 3 and is threadedly connected to the printing table 1. The connecting bolt is easy to obtain, and the connecting bolt can play a better role in connecting the printing table 1 and the connecting profile 3. The first flat washer 41 provides a mounting carrier for the rolling member 6 on the connecting bolt, which is beneficial to the stable operation of the rolling member 6.

[0023] In this embodiment, a connecting plate 7 is fixedly connected to the bottom of the printing platform 1. A connecting screw hole 71 is formed on the connecting plate 7. The upper part of the connecting bolt is threadedly connected to the connecting screw hole 71. The threaded connection method is simple and convenient to operate.

[0024] In this embodiment, the printing table 1 is made of aluminum alloy material, and the connecting plate 7 is made of carbon steel material; the connecting plate 7 made of carbon steel material can well ensure the threaded connection strength between it and the connecting bolt, so that the connection between the connecting bolt and the printing table 1 is stable.

[0025] As a more specific solution, the elastic member 5 is a butterfly spring, and the upper and lower surfaces of the butterfly spring are both provided with a second flat washer 8. The second flat washer 8 located on the upper surface of the butterfly spring abuts against the connecting profile 3, and the second flat washer 8 located on the lower surface of the butterfly spring abuts against the rolling member 6. The butterfly spring achieves stable abutment with the connecting profile 3 and the rolling member 6 through the second flat washers 8 on its upper and lower surfaces. At the same time, the butterfly spring has a small height and a compact structure, and it can also well achieve the purpose of this patent, namely: limiting the locking force of the connecting member 4, so that the connecting member 4 is not completely locked with the connecting profile 3, which is conducive to the sliding of the connecting member 4 and the rolling member 6.

[0026] In this embodiment, the rolling member 6 is a thrust ball bearing; thrust ball bearings are easy to obtain and can well achieve the purpose of this patent, namely: reducing the friction between the connecting member 4 and the elastic member 5 to facilitate the horizontal displacement of the connecting member 4.

[0027] As a more preferred embodiment, a heat insulation board 9 is further arranged between the connecting profile 3 and the printing table 1, and an avoidance through hole 91 is opened on the heat insulation board 9 for the connecting member 4 to pass through, and a third displacement gap 300 is present between the outer periphery of the connecting member 4 and the avoidance through hole 91; the heat insulation board 9 can well separate the printing table 1 and the connecting profile 3 to avoid excessive heat conduction to the connecting profile 3, and at the same time, the avoidance through hole 91 ensures that the heat insulation board 9 will not affect the displacement of the connecting member 4.

[0028] In this embodiment, the heat insulation board 9 is a fiberglass board; the surface of the fiberglass board is relatively smooth, which can effectively reduce the friction between the heat insulation board 9 and the printing table 1, and is beneficial to the displacement of the printing table 1.

[0029] As a more specific solution, the two ends of the lower part of the printing table 1 are connected with the connecting profile 3 so as to release stress at both ends of the printing table 1 and reduce the impact on the middle area of ​​the printing table 1, which is beneficial to the normal printing work of the printing table 1.

Claims

1. A 3D printing platform, comprising a printing platform (1), a heating layer (2) arranged below the printing platform (1), and a plurality of connecting profiles (3), wherein the printing platform (1) is placed on the plurality of connecting profiles (3), and is characterized in that: The invention also comprises a connecting member (4), an elastic member (5) and a rolling member (6), wherein the rolling member (6) is sleeved on the outer periphery of the connecting member (4), a through hole (51) is formed on the elastic member (5), the elastic member (5) is sleeved on the outer periphery of the connecting member (4) and the lower part of the elastic member (5) is placed on the rolling member (6), a first displacement gap (100) is present between the outer periphery of the connecting member (4) and the through hole (51) of the elastic member (5), the upper end of the connecting member (4) passes through the connecting profile (3) from bottom to top and is connected to the printing table (1), a second displacement gap (200) is present between the outer periphery of the connecting member (4) and the connecting profile (3), and the upper part of the elastic member (5) abuts against the connecting profile (3).

2. The 3D printing platform according to claim 1, characterized in that: The connecting member (4) is a connecting bolt, a first flat washer (41) is sleeved on the lower part of the connecting bolt, the rolling member (6) is sleeved on the outer periphery of the lower part of the connecting bolt and the rolling member (6) is placed on the first flat washer (41), and the upper part of the connecting bolt passes through the connecting profile (3) and is threadedly connected to the printing table (1).

3. The 3D printing platform according to claim 2, characterized in that: A connecting plate (7) is fixedly connected to the bottom of the printing platform (1), a connecting screw hole (71) is formed on the connecting plate (7), and the upper part of the connecting bolt is threadedly connected to the connecting screw hole (71).

4. The 3D printing platform according to claim 3, characterized in that: The printing platform (1) is made of an aluminum alloy material, and the connecting plate (7) is made of a carbon steel material.

5. The 3D printing platform according to claim 1, characterized in that: The elastic member (5) is a butterfly spring, and the upper and lower surfaces of the butterfly spring are both provided with a second flat washer (8), the second flat washer (8) located on the upper surface of the butterfly spring abuts against the connecting profile (3), and the second flat washer (8) located on the lower surface of the butterfly spring abuts against the rolling member (6).

6. The 3D printing platform according to claim 5, characterized in that: The rolling element (6) is a thrust ball bearing.

7. The 3D printing platform according to claim 1, characterized in that: A heat insulation board (9) is further provided between the connecting profile (3) and the printing table (1), the heat insulation board (9) being provided with an avoidance through hole (91) through which the connecting member (4) can pass, and a third displacement gap (300) is provided between the outer periphery of the connecting member (4) and the avoidance through hole (91).

8. The 3D printing platform according to claim 7, characterized in that: The heat insulation board (9) is a fiberglass board.

9. The 3D printing platform according to claim 1, characterized in that: The two ends of the lower part of the printing platform (1) are connected to the connecting profiles (3).

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