Multi-layer thick printing precision adjustment powder laying scraper of metal additive manufacturing equipment

Abstract

The utility model relates to a multi-layer thick printing precision adjustment powder spreading scraper of metal additive manufacturing equipment, which comprises a powder spreading device, a scraper main frame is arranged on the powder spreading device, a platform which is sunken downwards is arranged in the middle of the scraper main frame, two sides of the platform extend to form mounting tables, a scraper is arranged on the lower end face of the scraper main frame, and the scraper main frame and the mounting tables are arranged on the lower end face of the scraper main frame. A scraper clamp set is arranged on the scraper and comprises a scraper clamping plate and a scraper pressing plate, a driver is arranged in the mounting table and composed of a micro servo motor and a micro lead screw, and a lead screw nut matched with the micro lead screw is arranged in the bracket. According to the utility model, the micro servo motor is adopted as a main adjusting driving device, so that the scraper clamping group and the scraper can be adjusted to move up and down relatively in the use process, the high-precision movement guarantee can be effectively improved by adopting the matching of the screw rod nut and the screw rod, and the layer thickness adjustment of different areas is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of metal 3D printing auxiliary devices, in particular to a multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment. Background Art

[0002] With the development of additive manufacturing technology, most people and companies have invested a lot of energy in material research, hoping to develop more material parameters. However, ignoring the impact of printing efficiency and stability has restricted the development of the entire industry to a greater extent.

[0003] At present, some people in the industry are committed to the research of various new printing methods, and have gradually achieved some results. For example, multi-material 3D printing technology, compared with general 3D printing technology (AM) methods, multi-material 3D printing technology (MMAM) can achieve a higher level of design freedom, such as integrating materials, structures and functions to achieve customizable functions (local wear resistance, high thermal conductivity, thermal insulation, chemical corrosion resistance, etc.). However, at this stage, the MMAM technology of metal materials is still in the laboratory stage.

[0004] Another example is printing with variable layer thickness, that is, the thickness of each layer can be set in advance according to demand. However, this technology can currently only address the thickness changes between different printing layers, and cannot achieve layer thickness changes on a single printing surface because the scraper cannot be adjusted with high precision. Utility Model Content

[0005] The utility model aims to provide a multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment, aiming to improve the existing problems.

[0006] The utility model is achieved in this way:

[0007] A multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment, including a powder spreading device, a scraper main frame is arranged on the powder spreading device, the middle part of the scraper main frame is arranged as a downwardly concave platform, and mounting platforms are extended on both sides of the platform, a scraper is arranged on the lower end face of the scraper main frame, and a scraper clamp group is arranged on the scraper, the scraper clamp group includes a scraper clamping plate and a scraper pressure plate, and the upper end of the scraper is arranged between the scraper clamping plate and the scraper pressure plate, a driver is arranged in the mounting platform, and the driver includes a micro servo motor and a micro lead screw, and the micro lead screw cooperates with the lead screw nut.

[0008] Furthermore, brackets are provided on both sides of the scraper clamp assembly, and the brackets are respectively mounted on mounting tables on both sides of the scraper main frame, and screw nuts that cooperate with the micro screw are provided in the brackets.

[0009] Furthermore, a support base is provided below the micro servo motor, and the support base is engaged with the mounting plate of the mounting platform.

[0010] The micro servo motor can be fixed by setting a support seat to ensure the stability of the motor during rotation and avoid the motor shaking during use affecting the processing progress

[0011] Furthermore, a coupling is provided at the connection between the micro screw and the micro servo motor, and a locking nut is provided at the bottom end of the micro screw.

[0012] By setting a coupling at the upper end connection of the micro screw, the eccentricity of movement can be reduced to facilitate installation and debugging. Setting a locking nut at the bottom end can reduce the shaking of the screw when it rotates.

[0013] Furthermore, the micro screw is arranged through a layer plate in the mounting platform, and a bearing groove is arranged at a connection between the layer plate and the micro screw, and a deep groove ball bearing is arranged in the bearing groove.

[0014] The deep groove ball bearing and the bearing groove are used to provide support when the micro screw is rotating.

[0015] Furthermore, the micro screws arranged on both sides cooperate with the screw nuts in the bracket to drive the scraper clamp assembly to move up and down relative to the scraper main frame in the mounting platform.

[0016] By using micro screws and screw nuts as the main moving parts, high-precision movement guarantee is provided for the adjustment structure.

[0017] Furthermore, the scraper clamping plate and the bottom of the scraper pressing plate are provided with scraper grooves for fixing the scraper.

[0018] Furthermore, a plurality of threaded holes are arranged side by side on the upper end of the scraper pressing plate, and bolts are arranged in the threaded holes to fix the scraper clamping plate.

[0019] The cooperation between the scraper clamping plate and the scraper pressing plate can effectively clamp the scraper and ensure the stability of the scraper during use to prevent the scraper from deviating during work, thereby reducing the processing progress.

[0020] Furthermore, the bottom of the scraper is configured as an arc structure.

[0021] Furthermore, a back plate is provided on one side of the scraper main frame, and the bottom edge of the back plate extending downward is higher than the bottom edge of the scraper.

[0022] Furthermore, the scraper main frame and the mounting platforms on both sides are an integrated structure.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model adopts a micro servo motor as the main adjustment drive device, so that the scraper clamp group and the scraper can be adjusted to move up and down relative to each other during use. The combination of the lead screw nut and the lead screw can effectively improve the high-precision movement guarantee and realize the layer thickness adjustment in different areas. The technical solution adopts the splint method to fix the scraper during use, which can ensure the strength of the scraper during use, and can effectively correct the bottom parallelism during use, and ensure the processing accuracy during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0026] Figure 1 It is a structural schematic diagram of a multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment of the utility model;

[0027] Figure 2 It is a schematic diagram of the main frame structure of a scraper for multi-layer thick printing precision adjustment of powder spreading scraper for metal additive manufacturing equipment shown in the utility model;

[0028] Figure 3 It is a schematic diagram of the structure of a driver for a multi-layer thick printing precision adjustment powder spreading scraper of a metal additive manufacturing device shown in the utility model;

[0029] Figure 4 It is a schematic diagram of a scraper assembly structure of a multi-layer thick printing precision adjustment powder spreading scraper of a metal additive manufacturing device shown in the utility model;

[0030] Figure 5 It is a schematic diagram of the scraper pressing plate structure of a multi-layer thick printing precision adjustment powder spreading scraper of a metal additive manufacturing device shown in the utility model;

[0031] Figure 6 It is a partial cross-sectional view of a multi-layer thick printing precision adjustment powder spreading scraper of a metal additive manufacturing device shown in the utility model;

[0032] Figure 7 It is a schematic diagram of the movement of a multi-layer thick printing precision adjustment powder spreading scraper of a metal additive manufacturing device shown in the utility model.

[0033] In the figure: 1. scraper main frame; 11. back plate; 2. driver; 21. micro servo motor; 22. limit plate; 23. micro screw; 24. coupling; 25. locking nut; 3. bracket; 31. mounting plate; 32. bottom plate; 33. bearing groove; 4. scraper clamp assembly; 41. scraper clamp plate; 42. scraper groove; 43. scraper pressure plate; 44. bracket; 45. threaded hole; 5. scraper; 6. deep groove ball bearing; 7. screw nut. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0035] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. Figure 1 and Figure 2 A multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment includes a powder spreading device, a scraper main frame 1 is arranged on the powder spreading device, the middle part of the scraper main frame 1 is arranged as a downwardly concave platform, and mounting tables 3 are extended on both sides of the platform, the scraper main frame 1 and the mounting tables 3 on both sides are an integrated structure, a scraper 5 is arranged on the lower end surface of the scraper main frame 1, the bottom of the scraper 5 is arranged as an arc structure, and a scraper clamp group 4 is arranged on the scraper 5, the scraper clamp group 4 includes a scraper clamp plate 41 and a scraper pressure plate 43, and the upper end of the scraper 5 is arranged between the scraper clamp plate 41 and the scraper pressure plate 43, A bracket 44 is provided on both sides of the scraper clamp group 4, and the bracket 44 is respectively installed on the mounting platform 3 on both sides of the scraper main frame 1. A driver 2 is provided in the mounting platform 3, and the driver 2 is composed of a micro servo motor 21 and a micro screw 23. A screw nut 7 cooperating with the micro screw 23 is provided in the bracket 44. During use, the micro screw 23 rotates to drive the brackets 44 on both sides to move up and down. During use, the micro servo motors 21 on both sides work and control synchronously, ensuring that the scraper 5 can move up and down smoothly during use to achieve adjustment of different layer thicknesses.

[0036] In the embodiment of the utility model, the micro servo motor 21 cooperates with the micro screw 23 and the screw nut 7 to form a lifting mechanism to drive the scraper 5 to lift and lower, thereby achieving the effect of the utility model. It should be noted that the effect of the utility model can also be achieved by other lifting mechanisms. For example, a gear and rack structure can be used as a lifting mechanism, the gear is connected to the micro servo motor 21, the rack is meshed with the gear, and the rack is fixedly connected to the bracket 44, thereby achieving the technical effect of moving the scraper up and down;

[0037] In another embodiment, the scraper on the bracket 44 can be lifted up and down to achieve the technical effect of moving the scraper up and down by using an air cylinder or an oil cylinder in cooperation with a single-fork hinge mechanism; in addition, a lifting mechanism of a motor and a chain can be set up. In addition, a pneumatic lifting mechanism can be used to achieve the technical effect of moving the scraper up and down to lift the scraper. Specifically, the scraper can be moved up and down by means of an air cylinder and double guide rods or four guide rods. The embodiment of the utility model does not impose too many restrictions on the scraper's up and down movement mechanism.

[0038] Please refer to Figure 2 and Figure 3 A support seat 22 is arranged below the micro servo motor 21, and the support seat 22 is engaged with the mounting plate 31 of the mounting platform 3, a coupling 24 is arranged at the connection between the micro screw 23 and the micro servo motor 21, and a locking nut 25 is arranged at the bottom end of the micro screw 23, the micro screw 23 is arranged through the layer plate 32 in the mounting platform 3, and a bearing groove 33 is arranged at the connection between the layer plate 32 and the micro screw 23, and a deep groove ball bearing is arranged in the bearing groove 33, the micro screw 23 arranged on both sides cooperate with the screw nut in the bracket 44 to drive the scraper clamp group 4 to move up and down relative to the scraper main frame 1 in the mounting platform 3, and a back plate 11 is arranged on one side of the scraper main frame 1, and the bottom edge of the back plate 11 extending downward is higher than the bottom edge height of the scraper 5.

[0039] Please refer to Figure 4 , Figure 5 and Figure 6 A scraper groove 42 for fixing the scraper 5 is arranged at the bottom of the scraper clamping plate 41 and the scraper pressing plate 43. A plurality of threaded holes 45 are arranged side by side at the upper end of the scraper pressing plate 43, and bolts are arranged in the threaded holes 45 to fix the scraper clamping plate 41. During use, the scraper clamping plate 41 and the scraper pressing plate 43 are fastened by bolts to achieve a stable effect, and are convenient for disassembly and adjustment during use.

[0040] Please refer to Figure 7 During use, the scraper main frame 1 serves as the main installation structure, the scraper clamping plate 41 and the scraper pressing plate 43 clamp the scraper 5 and are fixedly installed on the two ends of the micro-screw 23 with the nut; when the layer thickness needs to be changed during the powder spreading process, the motors at both ends drive the micro-screw 23 to lift the screw nut 7, thereby realizing the action of the scraper 6 rising and changing the layer thickness, and the scraper 6 can be controlled with high precision during the powder spreading process to spread powder with different layer thicknesses on a single width.

[0041] The utility model adopts a micro servo motor as the main adjustment drive device, so that the scraper clamp group and the scraper can be adjusted to move up and down relative to each other during use. The combination of the lead screw nut and the lead screw can effectively improve the high-precision movement guarantee and realize the layer thickness adjustment in different areas. The technical solution adopts the splint method to fix the scraper during use, which can ensure the strength of the scraper during use, and can effectively correct the bottom parallelism during use, and ensure the processing accuracy during use.

[0042] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0043] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0044] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0045] Although this specification has shown and described a plurality of embodiments of the utility model, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover the modular composition, equivalent or alternatives within the scope of these claims.

Claims

1. A multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment, characterized in that: The invention comprises a powder spreading device, wherein a scraper main frame (1) is arranged on the powder spreading device, a scraper (5) is arranged on the lower end surface of the scraper main frame (1), and a scraper clamping group (4) is arranged on the scraper (5), wherein the scraper clamping group (4) comprises a scraper clamping plate (41) and a scraper pressing plate (43), and the upper end of the scraper (5) is arranged between the scraper clamping plate (41) and the scraper pressing plate (43), and a driver (2) is arranged in the mounting platform (3), and the driver (2) comprises a micro servo motor (21) and a micro screw (23), and the micro screw (23) cooperates with a screw nut (7).

2. The multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: Support seats (44) are provided on both sides of the scraper clamp assembly (4), and the support seats (44) are respectively mounted on mounting platforms (3) on both sides of the scraper main frame (1), and a screw nut (7) matching the micro screw (23) is provided in the support seat (44).

3. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: A support seat (22) is provided below the micro servo motor (21), and the support seat (22) is engaged with a mounting plate (31) of the mounting platform (3).

4. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: A coupling (24) is provided at the connection between the micro screw rod (23) and the micro servo motor (21), and a locking nut (25) is provided at the bottom end of the micro screw rod (23).

5. The multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: The micro screw (23) is arranged through a layer plate (32) in the mounting platform (3), and a bearing groove (33) is arranged at the connection between the layer plate (32) and the micro screw (23), and a deep groove ball bearing is arranged in the bearing groove (33).

6. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 2, characterized in that: The micro screws (23) arranged on both sides cooperate with the screw nuts in the bracket (44) to drive the scraper clamp assembly (4) to move up and down relative to the scraper main frame (1) in the mounting platform (3).

7. The multi-layer thick printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: The scraper clamping plate (41) and the scraper pressing plate (43) are provided at the bottom with a scraper groove (42) for fixing the scraper (5).

8. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 1, characterized in that: A plurality of threaded holes (45) are arranged side by side at the upper end of the scraper pressing plate (43), and bolts are arranged in the threaded holes (45) to fix the scraper clamping plate (41).

9. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 6, characterized in that: The bottom of the scraper (5) is arranged in a circular arc structure.

10. The multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to claim 6, characterized in that: A back plate (11) is provided on one side of the scraper main frame (1), and the bottom edge of the back plate (11) extending downward is higher than the bottom edge of the scraper (5).

11. A multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to any one of claims 1 to 10, characterized in that: The scraper main frame (1) and the mounting platforms (3) on both sides are an integrated structure.

12. A multi-layer thickness printing precision adjustment powder spreading scraper for metal additive manufacturing equipment according to any one of claims 1 to 10, characterized in that: The middle part of the scraper main frame (1) is arranged as a downwardly recessed platform, and mounting platforms (3) are extended on both sides of the platform.

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