Photocuring 3D printer workbench and 3D printer with same

Abstract

The utility model provides a photocuring 3D printer workbench and a 3D printer with the photocuring 3D printer workbench, and belongs to the field of rapid prototyping. The problems that a traditional leveling device is insufficient in locking force, and leveling accuracy is not easy to guarantee are solved. A photocuring 3D printer workbench comprises a working plate, at least one pair of studs are arranged on the end face of the side, away from a working plane, of the working plate; the elastic pieces are arranged on the studs in a sleeving manner in a one-to-one correspondence manner; the supporting plate and the working plate are arranged in a spaced mode, open holes corresponding to the studs are formed in the plate face in a penetrating mode, a deformation sleeve is arranged in each open hole, and after each stud penetrates through the corresponding deformation sleeve, an adjusting nut is arranged at the free end; the pressing assemblies are located in the supporting plate, are arranged in one-to-one correspondence with the deformation sleeves and can be in contact with the deformation sleeves; and the locking assemblies are arranged corresponding to the pressing assemblies and used for pushing the corresponding pressing assemblies to abut against the corresponding deformation sleeves, so that the deformation sleeves deform to lock the corresponding studs. The leveling device is mainly used for leveling the workbench.

Description

Technical Field

[0001] The utility model belongs to the field of rapid prototyping, and in particular relates to a light-curing 3D printer workbench and a 3D printer having the same. Background Art

[0002] Stereolithography 3D printing is a manufacturing method that projects the layered pattern of a three-dimensional model layer by layer onto the surface of a photosensitive material in a container, and then cures the resulting stacked pattern through exposure. The container is usually called a resin pool or a liquid pool, and the commonly used photosensitive material is generally a photosensitive resin. There are two types of structures for stereolithography 3D printers. One is that the pattern is projected onto the upper surface of the photosensitive resin, which is called the upper printing structure. In the other structure, the pattern passes through the bottom of the transparent liquid pool and is projected onto the lower surface of the photosensitive resin, which is called the lower printing structure.

[0003] Before printing, the bottom-printing light-curing 3D printer needs to accurately adjust the gap between the workbench and the bottom of the photosensitive resin pool to ensure that the model is reliably bonded to the workbench when the first layer is printed. The appropriate gap should include two characteristics. On the one hand, the gap cannot be too large, otherwise if it exceeds the range allowed by the process and resin characteristics, it will cause the model to fall off and the printing to fail; on the other hand, it should ensure that the gaps at various positions under the workbench are basically consistent. If the gap deviation is large, it will cause model size errors. At the same time, the position with too small a gap will be too firmly bonded to the workbench, and the model will be easily damaged when shoveled off the workbench. In order to adapt to the manufacturing and assembly tolerances of the printer, as well as the different requirements for gaps for different types of resin materials and printing processes, a leveling mechanism must be used to complete the gap adjustment.

[0004] The core of the leveling mechanism to complete the gap adjustment is to accurately adjust the clamping force between the workbench and the pool bottom. When the clamping force is balanced with the viscosity of the photosensitive resin in the gap of appropriate thickness, successful leveling is achieved. Since the connecting parts between the workbench and the drive mechanism are often asymmetric cantilever structures, the torque generated by the viscosity of the resin at different positions under the workbench is different. At the same time, the workbench and the connecting parts are not ideal rigid bodies. Therefore, in order to achieve a consistent gap in the entire exposure range, the clamping force on the workbench must be adjusted independently at multiple points, otherwise the gap thickness will have serious differences due to the deformation of the cantilever and the workbench itself.

[0005] In addition, since the down-printing light-curing 3D printer vibrates when it is working, the workbench is frequently installed and removed during the printing operation process, and the model workbench is subjected to impact force. Therefore, the leveling mechanism needs to be locked to prevent it from loosening and failing due to vibration, impact, accidental touch, etc. during operation.

[0006] Existing leveling mechanisms include ball hinge adjustment, spring passive adjustment, thread adjustment and other solutions, but all of them have the following problems:

[0007] 1. Imprecise leveling: CN217373494U uses a spring to generate a clamping force like the present invention, but according to its structure, the pressure generated by the spring is fixed during assembly, which can neither adapt to resins with different viscosities nor ensure the consistency of the resin gap. CN220297860U uses thread force to achieve leveling. The lower surface of the workbench has no translational freedom, only rotational freedom. Even if the adjustment is successful, it can only ensure the consistency of the gap, and the size of the gap cannot be accurately set. At the same time, due to the existence of the universal joint, its structure is like a seesaw. Adjusting one point will inevitably affect the other three points, which makes accurate adjustment very difficult, and it is difficult to converge after multiple adjustments. CN219564140U also uses thread force to adjust the pressure. Since the relationship between the thread force and the stroke involves structural stiffness, it is difficult to control in the design process. At the same time, the thread force is transmitted multiple times through several layers of structure. The existence of assembly errors will inevitably make the adjustment range very small, but the clamping force changes greatly, and the relationship between the two is nonlinear, which will make the user at a loss during the adjustment process. On the surface, CN217144909U uses a screw to pass through the spring, which is similar to the structure of the present utility model. However, it can be seen from its description and drawings that its structure is inverted with the present utility model, and the spring cannot be used to generate the clamping force. The thread force is still used to adjust the clamping force. In addition, the document couples the leveling mechanism with the workbench connector, and the structural space is small. Compared with the resin viscosity at the four corners of the workbench, the clamping force arm is too short, and it cannot effectively overcome the gap error caused by the deformation of the workbench and the cantilever. CN117507357A is also similar to CN217144909U. The spring is also not used to generate the clamping force, but is used as a buffer structure.

[0008] 2. Complex structure: The CN217144909U design requires an electromagnet, the CN218701319U requires an additional drive motor and sensor, the CN217704736U requires a level and a sliding fit mechanism, the CN220297860U requires high-precision bearings and universal joints, and the CN217144909U requires multiple sliding bearings or guide rails. These complex structures significantly increase manufacturing costs and reduce reliability.

[0009] 3. Unreliable locking: Most patent documents do not have a locking function in their designs, and leveling is prone to failure. CN217144909U uses a gasket to prevent loosening, but the gasket needs a certain clamping force to be tightened. If the screw is loosened during the leveling process, the clamping force is insufficient and the locking effect cannot be achieved. The CN219564140U structure uses a spring plunger, but this structure is not used to lock the leveling mechanism, but to tighten the workbench. Summary of the invention

[0010] In view of this, the utility model aims to provide a light-curing 3D printer workbench and a 3D printer having the same, so as to solve the problem that the locking force of the traditional leveling device is insufficient and it is difficult to ensure the leveling accuracy.

[0011] To achieve the above purpose, the utility model adopts the following technical solution: According to one aspect of the utility model, a light-curing 3D printer workbench is provided, comprising:

[0012] The working plate has at least one pair of studs arranged on an end surface away from the working plane;

[0013] An elastic member is sleeved on each of the studs in a one-to-one correspondence;

[0014] The support plate is arranged at intervals from the working plate and has an opening corresponding to each of the studs on the plate surface, a deformation sleeve is arranged in each of the openings, and after each of the studs passes through the corresponding deformation sleeve, an adjustment nut is arranged on the free end thereof to abut against the end surface of the support plate away from the working plate, and the two ends of each of the elastic members abut against the opposite surfaces of the working plate and the deformation sleeve respectively;

[0015] A clamping assembly is located in the support plate, arranged in one-to-one correspondence with each of the deformation sleeves and can contact the deformation sleeves;

[0016] The locking assembly is correspondingly arranged with each of the clamping assemblies and is used to push the corresponding clamping assembly against the corresponding deformable sleeve so that the deformable sleeve deforms and locks the corresponding stud.

[0017] Furthermore, a compression nut is coaxially arranged on each of the studs, one end of the compression nut is connected to the working plate, and the other end of the compression nut is connected to the corresponding elastic member.

[0018] Furthermore, a positioning groove is arranged on the end surface of the support plate away from the working plate, and an anti-slip layer is arranged on the inner surface of the positioning groove.

[0019] Furthermore, a handle is provided on the end surface of the support plate away from the working plate.

[0020] Furthermore, a clamping screw is arranged on the support plate.

[0021] Furthermore, first threaded holes whose axes are perpendicular to and connected to the axes of each opening are arranged one by one on the support plate, and each of the clamping components is arranged in the corresponding first threaded hole.

[0022] Furthermore, the clamping assembly is a non-deformable ball or cylinder.

[0023] Furthermore, the deformation sleeve is a copper sleeve.

[0024] Furthermore, the elastic member is a spring.

[0025] According to another aspect of the utility model, a light-curing 3D printer is provided, characterized in that it includes the light-curing 3D printer workbench described above.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. Accurate leveling: This workbench uses springs to provide clamping force. During adjustment, the rotation angle of the nut is linearly related to the clamping force, and the adjustment stroke is large, so the clamping force can be accurately set to obtain a suitable gap. At the same time, the multi-point adjustment design can independently adjust the clamping force in different areas, eliminate the influence of the deformation of the workbench and the cantilever, and ensure the consistency of the gap;

[0028] 2. Simple structure: This workbench has few parts and no kinematic pairs. Except for the support plate and the work plate, all other parts are standard parts or commercially available general parts, and no sensors, control or drive systems are required. This not only brings good structural rigidity, so that the spring force can be reliably transmitted to the work plate, ensuring the accuracy of leveling, but also can significantly reduce costs and improve reliability;

[0029] 3. Easy to operate: The workbench is intuitive to operate during the leveling process, and no tools are required. Moreover, the workbench is decoupled from other structures of the printer. After multiple workbenches are leveled on the same printer, they can be interchanged without re-leveling. This allows for quick switching between different resin materials, and can also prevent the printer from being idle during model processing, thus improving work efficiency;

[0030] 4. Low cost: Because this workbench has the characteristics of simple structure, few workbench processing parts, simple processing technology, low-priced standard parts used, easy assembly, the cost is much lower than similar designs.

[0031] 5. High reliability: Since the workbench has a simple structure and no high-precision matching or kinematic pairs, the contamination or immersion of photosensitive resin will not affect the normal function of the leveling mechanism. At the same time, no electronic components are required, which also reduces the probability of failure. A reliable locking device is also designed, which can be maintained for a long time after the leveling is completed and withstands impact, thereby improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 It is a partial cross-sectional view of a light-curing 3D printer workbench described in the utility model;

[0034] Figure 2This is a three-dimensional structural schematic diagram of a light-curing 3D printer workbench described in the utility model;

[0035] Figure 3 This is a front view of a light-curing 3D printer workbench described in the utility model;

[0036] Figure 4 This is a working state diagram of a light-curing 3D printer workbench immersed in a resin pool described in the utility model.

[0037] Support plate 1; working plate 2; stud 3; opening 4; adjusting nut 5; elastic member 6; deformation sleeve 7; first threaded hole 8; clamping assembly 9; locking screw 10; compression nut 11; positioning groove 12; second threaded hole 13; clamping screw 14; handle 15. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0039] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Referring to the accompanying drawings, this embodiment is described. According to one aspect of the utility model, a light-curing 3D printer workbench is provided, comprising:

[0042] The working plate 2 is provided with at least one pair of studs 3 on the end surface on the side away from the working plane; the studs 3 are arranged in pairs for symmetrical adjustment to ensure the accuracy of adjustment on both sides. The best way is to use two pairs, a total of four studs 3, which are distributed at the four corners of the working plate 2, so that the entire working plate 2 can be adjusted in all directions to ensure the flatness requirement. As for the connection method between the studs 3 and the working plate 2, they can be connected by threaded connection, welding, gluing or top screw fastening, as long as it can ensure that it is tightly connected to the working plate 2. No specific limitation is made here, and it can be selected according to actual use requirements.

[0043] The elastic member 6 is sleeved on each of the studs 3 in a one-to-one correspondence; the purpose of the elastic member 6 is to ensure that the working plate 2 and the support plate 1 form a floating connection relationship, so that the flatness of the working plate 2 at the corresponding position can be adjusted by twisting the adjusting nut 5 located at the free end of the stud 3. At the same time, the present application adopts the form of abutting the deformable sleeve 7 with the elastic member 6, so that the setting of the elastic member 6 will not be in vain and will not play a corresponding role. By setting the deformable sleeve 7 in the opening 4, the opening 4 and the deformable sleeve 7 can also move relative to each other, so the relative distance between the working plate 2 and the support plate 1 can completely rely on the cooperation of the adjusting nut 5 and the elastic member 6, and the relative connection position between the stud 3 and the adjusting nut 5 can be uniquely determined. In this way, the fixed stud 3 only plays the role of support and connection, and the adjusting nut 5 cooperates with the elastic member 6 to determine the relative position between the support plate 1 and the working plate 2, thereby improving the accuracy of adjustment and making the accuracy controllable. The elastic member 6 can be specifically in the form of a spring or a disc spring, etc. Any elastic member that can meet the usage conditions of this application can be used in this application, and can be selected according to actual needs.

[0044] The support plate 1 is arranged at intervals with the working plate 2 and has an opening 4 corresponding to each of the studs 3 on the plate surface, and a deformation sleeve 7 is arranged in each of the openings 4. After each of the studs 3 passes through the corresponding deformation sleeve 7, an adjustment nut 5 is arranged on the free end thereof to abut against the end surface of the support plate 1 away from the working plate 2, and the two ends of each of the elastic members 6 abut against the opposite surfaces of the working plate 2 and the deformation sleeve 7 respectively;

[0045] A clamping assembly 9 is located inside the support plate 1 and is arranged one-to-one with each of the deformable sleeves 7 and can contact the deformable sleeves 7;

[0046] The locking assembly is provided corresponding to each of the clamping assemblies 9 and is used to push the corresponding clamping assembly 9 against the corresponding deformation sleeve 7 so that the deformation sleeve 7 is deformed and locks the corresponding stud 3. The clamping assembly 9 is used as a torque transmission, so that the locking assembly transmits the extrusion force to the deformation sleeve 7 through the clamping assembly 9 during the locking process, so that the deformation sleeve 7 can lock the corresponding stud 3 after deformation, so that the state with high precision level after adjustment can be locked to prevent relative movement from affecting the precision during use, thereby ensuring the precision of the product after molding. For the deformation sleeve 7, any sleeve structure with a certain strength and capable of deformation can be used in this application. Specifically, a copper sleeve is selected for use in this application. For the stud 3, the part covered by the copper sleeve may not be provided with a thread, which can prevent the copper sleeve from being damaged when it is deformed, and prevent the phenomenon of inconvenience in disassembly during disassembly and maintenance.

[0047] In this embodiment, a compression nut 11 is coaxially arranged on each of the studs 3, one end of the compression nut 11 is connected to the working plate 2, and the other end is connected to the corresponding elastic member 6. The compression nut 11 is arranged to prevent the elastic member 6 from causing wear to the end surface of the working plate 2 during repeated adjustments. At the same time, this arrangement is to ensure that when the compression nut 11 is worn to a certain extent, the accuracy requirements of the initial state can be guaranteed after replacing a new compression nut 11, so as to ensure that the corresponding forming task can be completed with high precision throughout the life cycle of the workbench.

[0048] In this embodiment, a positioning groove 12 is provided on the end surface of the support plate 1 away from the working plate 2, and an anti-skid layer is provided on the inner surface of the positioning groove 12. The anti-skid layer can make the clamping screw 14 contact with the anti-skid layer after being tightened, which can increase the friction force and prevent the relative slipping and loosening from occurring.

[0049] In this embodiment, a handle 15 is provided on the end surface of the support plate 1 away from the working plate 2. The provision of the handle 15 can facilitate manual operation. Specifically, the handle 15 can be provided in a symmetrical arrangement on both sides, so as to facilitate the coordinated use of both hands. As for the fixing form of the handle 15, it can be connected in the form of welding, threaded connection or clamping. The specific connection form is selected according to actual needs. Furthermore, for the handle 15, an anti-slip pattern or an anti-slip layer, such as rubber, can be provided on the outer wall to increase the stability when holding.

[0050] In this embodiment, a clamping screw 14 is provided on the support plate 1. The clamping screw 14 is provided to tighten the clamping screw 14 to connect with the pool bottom for further fixation after leveling, thereby increasing the stability during the molding process. Specifically, a second threaded hole 13 is provided through the surface of the support plate 1, and the clamping screw 14 is threadedly connected with the second threaded hole 13.

[0051] In this embodiment, first threaded holes 8 whose axes are perpendicular to and connected to the axes of each opening 4 are provided on the support plate 1 in a one-to-one correspondence, and each of the clamping assemblies 9 is disposed in the corresponding first threaded hole 8 .

[0052] In this embodiment, the clamping component 9 is a non-deformable ball or cylinder. The clamping component 9 is slidably disposed in the threaded hole 8, and the locking component is configured as a locking screw 10. By tightening the locking screw 10, the clamping component 9 can be driven to clamp the copper sleeve, so that the copper sleeve deforms and locks the corresponding stud 3. For the clamping component 9, a sphere is a preferred form, because after being released, the sphere will automatically roll to release the locking state.

[0053] According to another aspect of the utility model, a light-curing 3D printer is provided, comprising a light-curing 3D printer workbench as described above.

[0054] When in use, the positioning groove 12 on the support plate 1 cooperates with the connecting piece of the driving mechanism on the printer body, and the support plate 1 and the connecting piece are pressed together by the pressing screw 14. When leveling, the relative position of the connecting piece and the pool bottom is fixed, and the spring can be loosened or compressed by turning each adjustment nut 5, changing the pressure applied by the spring to the working plate 2, thereby adjusting the gap between the working plate 2 and the pool bottom. Since there are multiple leveling points, this adjustment is local, so the pressure at each location can be accurately set to ensure the consistency of the gap thickness.

[0055] When locking, the locking screw 10 pushes the steel ball to squeeze the side wall of the copper sleeve until the copper sleeve is deformed to compress the stud 3 and generate a suitable pre-tightening force. At this time, the pressure and friction between the various parts completely lock the stud 3, copper sleeve, steel ball, and locking screw 10. Since the locking screw 10 and the support plate 1, and the stud 3 and the working plate 2 are rigidly connected, the support plate 1 and the working plate 2 are locked and no relative displacement occurs. The above-mentioned locking mechanism transmits the locking force through the steel ball and copper sleeve. When locking, the vertical component of the locking friction force will not cause the screw 3 to move and change the position of the workbench. It can ensure the maintenance of the adjustment accuracy.

[0056] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A light-curing 3D printer workbench, characterized in that: include: A working plate (2) is provided with at least one pair of studs (3) on an end surface of a side away from the working plane; An elastic member (6) is sleeved on each of the studs (3) in a one-to-one correspondence; The support plate (1) is arranged at intervals from the working plate (2) and has an opening (4) corresponding to each of the studs (3) formed thereon, a deformation sleeve (7) being provided in each of the openings (4), and an adjustment nut (5) being provided on the free end of each of the studs (3) after passing through the corresponding deformation sleeve (7) and abutting against the end face of the support plate (1) away from the working plate (2), and both ends of each of the elastic members (6) are respectively abutted against the opposite surfaces of the working plate (2) and the deformation sleeve (7); A pressing assembly (9) is located inside the support plate (1), arranged in one-to-one correspondence with each of the deformable sleeves (7) and capable of contacting the deformable sleeves (7); A locking assembly is provided corresponding to each of the clamping assemblies (9) and is used to push the corresponding clamping assembly (9) against the corresponding deformation sleeve (7) so that the deformation sleeve (7) deforms and locks the corresponding stud (3).

2. A light-curing 3D printer workbench according to claim 1, characterized in that: A compression nut (11) is coaxially arranged on each stud (3); one end of the compression nut (11) is connected to the working plate (2) and the other end is connected to the corresponding elastic member (6).

3. A light-curing 3D printer workbench according to claim 1, characterized in that: A positioning groove (12) is provided on the end surface of the support plate (1) away from the working plate (2), and an anti-slip layer is provided on the inner surface of the positioning groove (12).

4. A light-curing 3D printer workbench according to claim 1, characterized in that: A handle (15) is provided on the end surface of the support plate (1) away from the working plate (2).

5. The light-curing 3D printer workbench according to claim 1, characterized in that: A clamping screw (14) is arranged on the support plate (1).

6. The light-curing 3D printer workbench according to claim 1, characterized in that: The support plate (1) is provided with first threaded holes (8) whose axes are perpendicular to and connected to the axes of each opening (4) in a one-to-one correspondence, and each of the clamping assemblies (9) is arranged in the corresponding first threaded hole (8).

7. The light-curing 3D printer workbench according to claim 1, characterized in that: The pressing component (9) is a non-deformable ball or cylinder.

8. The light-curing 3D printer workbench according to claim 1, characterized in that: The deformation sleeve (7) is a copper sleeve.

9. The light-curing 3D printer workbench according to claim 1, characterized in that: The elastic member (6) is a spring.

10. A light-curing 3D printer, characterized in that: It comprises a light-curing 3D printer workbench as described in any one of claims 1 to 9.

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