Scraper structure for 3D printing and scraper mounting tool

Abstract

The utility model relates to the technical field of 3D (three-dimensional) printing, and discloses a scraper structure for 3D printing and a scraper mounting tool, which comprise a scraper holder and scraper components arranged at two ends of the lower part of the scraper holder, the scraper assembly comprises a powder laying plate fixedly arranged below the scraper frame through bolts, scraper fixing plates fixedly arranged on the two sides of the powder laying plate through bolts, and vulcanization scrapers vertically connected to the interiors of the scraper fixing plates in a sliding mode. Through the arrangement of the scraper assembly, the first plate block and the second plate block, the vulcanization scrapers can freely fall down through gravity in the scraper fixing plate, and after the bottoms of the two sets of vulcanization scrapers make contact with the surface of the first plate block, connection is achieved through penetration of bolts; the qualified flatness of the two sets of vulcanization scrapers is provided, the consistency of the two sets of vulcanization scrapers is improved, repeated powder laying adjustment through a micrometer head is avoided, the needed adjustment time is shortened, the assembly efficiency is improved, and the printing precision and the surface printing quality of workpieces are improved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to a scraper structure and scraper mounting fixture for 3D printing. Background Technology

[0002] Metal 3D printing technology uses a laser beam to selectively heat metal powder, melting it into a liquid state. This liquid is then used to form the desired 3D printed metal part layer by layer on a substrate. The mechanism by which the metal powder is evenly spread layer by layer on the printing substrate has a significant impact on the printing quality.

[0003] Currently used mechanisms can achieve bidirectional toner application. The two squeegees are adjusted vertically using a micro-head. During squeegee installation, the printing substrate is typically used as a reference to adjust both squeegees separately, ensuring they are parallel to the substrate. This method is complex and requires multiple toner applications. The efficiency is low because the squeegee adjustment is done independently on both sides, leading to inconsistent toner application and affecting print quality. Furthermore, during actual printing, squeegee wear necessitates replacement. Replacing the squeegee with the substrate presents problems, as the substrate contains printed parts, requiring a different reference point. Typically, the forming chamber floor is used as the reference, resulting in inconsistent reference points before and after squeegee replacement. Moreover, squeegee replacement is time-consuming and can cause delamination in the printed parts. Therefore, this squeegee installation and adjustment method suffers from low efficiency, inconsistent precision and consistency between the two sides, and negatively impacts print quality. Utility Model Content

[0004] The purpose of this invention is to provide a scraper structure and scraper mounting fixture for 3D printing, so as to solve the problem of time-consuming and laborious calibration during scraper installation mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a 3D printing scraper structure, including a scraper holder and a scraper assembly. The scraper assembly is disposed at both lower ends of the scraper holder. The scraper assembly includes a powder spreading plate fixed to the lower part of the scraper holder by bolts, a scraper fixing plate fixed to both sides of the powder spreading plate by bolts, and a vulcanizing scraper vertically slidably connected inside the scraper fixing plate.

[0006] By adopting the above technical solution, the vulcanizing scraper can change its position by its own weight. After the bottoms of the two sets of vulcanizing scrapers come into contact with an object on the same horizontal plane, the two sets of vulcanizing scrapers can be quickly kept on the same horizontal line.

[0007] Preferably, the scraper holder is T-shaped and has holes for installation.

[0008] By adopting the above technical solution, the scraper holder can serve as a connection between structures, and the holes opened in the scraper holder can provide through-insertion connection positioning for the structure.

[0009] Preferably, horizontal positioning posts are welded to both sides of the powder spreading plate, and holes for installation are opened on the upper sides of both sides of the powder spreading plate.

[0010] By adopting the above technical solution, the horizontal positioning column provides the connection between the two side structures, and the hole opened at the top provides the through-insertion connection for subsequent bolts.

[0011] Preferably, the top of the scraper fixing plate has a hole for installation, the two sides of the scraper fixing plate have through positioning holes, the bottom of the scraper fixing plate has a sliding groove, and the inner walls of the sliding groove of the scraper fixing plate have circular mounting holes on both sides.

[0012] By adopting the above technical solution, the scraper fixing plate serves as a connection between the structures, and the groove opened at the bottom allows the vulcanizing scraper to achieve vertical sliding displacement inside it.

[0013] Preferably, the surface of the vulcanizing scraper is provided with rectangular mounting holes.

[0014] By adopting the above technical solution, the rectangular mounting hole of the vulcanizing scraper can achieve sliding displacement even when the bolts are not tightened after subsequent connection by bolts.

[0015] Preferably, the 3D printing scraper structure further includes a positioning pin hole formed on the scraper holder.

[0016] By adopting the above technical solution, the scraper holder can be quickly positioned and aligned before being connected to the structure.

[0017] In another aspect, this utility model provides a scraper installation fixture, which further includes: a first plate and a second plate. The first plate is vertically disposed on one side of the outer wall of the scraper holder. The first plate has an installation hole and a positioning post welded to it. The distance from the positioning post to the bottom surface of the first plate is equal to the distance from the positioning post of the scraper installation in the molding chamber to the laser focal plane. The second plate is horizontally welded to the bottom of the first plate, and the top of the second plate is in contact with the bottom of the vulcanizing scraper.

[0018] By adopting the above technical solution, the No. 1 plate is connected to the scraper frame by positioning column. The distance from the positioning column to the bottom surface of the No. 1 plate is equal to the distance from the scraper installation positioning column in the molding chamber to the laser focal plane. When the vulcanizing scraper is in a vertically movable state, it can contact the No. 2 plate to ensure that the two sets of vulcanizing scrapers maintain the same horizontal line.

[0019] In summary, this utility model has at least the following beneficial effects:

[0020] (1) By setting up a scraper assembly, a first plate and a second plate, the vulcanizing scraper can fall freely under gravity inside the scraper fixing plate. When the bottom of the two sets of vulcanizing scrapers contacts the surface of the first plate, they are connected by bolts. This provides the two sets of vulcanizing scrapers with qualified flatness and improves the consistency of the two sets of vulcanizing scrapers. It avoids multiple powdering adjustments by micro-head, reduces the required adjustment time, improves assembly efficiency and improves the printing accuracy and surface printing quality of the workpiece.

[0021] (2) By setting up a scraper holder, positioning pin holes and a No. 1 plate, the scraper holder and the No. 1 plate are positioned by a pin shaft, ensuring the consistency of the distance when installing the vulcanizing scraper each time, and avoiding the impact of the operator's skill level on the printing quality of the workpiece.

[0022] (3) By setting up a scraper holder, positioning pin hole, scraper assembly, No. 1 plate and No. 2 plate, the efficiency of scraper installation and adjustment can be improved, the consistency of scrapers on both sides can be improved, and the installation accuracy of scraper can be improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the scraper assembly installation structure of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the scraper assembly of this utility model;

[0025] Figure 3 A three-dimensional structural diagram showing the installation of the scraper holder, powder spreading board, No. 1 board, and No. 2 board of this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the installation of the scraper fixing plate and the vulcanizing scraper of this utility model.

[0027] Figure 5 This is a three-dimensional structural diagram of the scraper holder and scraper assembly of this utility model.

[0028] Figure 6 This is a three-dimensional structural diagram showing the connection between the first and second plates of this utility model;

[0029] Figure 7A three-dimensional structural diagram of the existing scraper assembly.

[0030] In the diagram: 1. Scraper holder; 2. Positioning pin hole; 3. Scraper assembly; 301. Powder spreading plate; 302. Scraper fixing plate; 303. Vulcanizing scraper; 4. Plate No. 1; 5. Plate No. 2. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The following is in conjunction with the appendix Figure 1-6 The embodiments of this utility model will be described in further detail.

[0033] Example 1

[0034] Please see Figures 1-6 This embodiment provides a technical solution: a scraper structure for 3D printing, including: a scraper holder 1, a positioning pin hole 2, and a scraper assembly 3;

[0035] The scraper holder 1 is T-shaped and has holes for installation, providing a connection between the scraper holder 1 and the structure. The locating pin holes 2 on the scraper holder 1 provide positioning for the scraper holder 1, thereby enabling a quick connection between the scraper holder 1 and the structure. The scraper assembly 3 is located at both ends of the lower part of the scraper holder 1.

[0036] The scraper assembly 3 includes a powder spreading plate 301 fixed to the bottom of the scraper frame 1 by bolts. Horizontal positioning posts are welded to both sides of the powder spreading plate 301, and holes for installation are opened on the upper sides of both sides of the powder spreading plate 301. Scraper fixing plates 302 are fixed to both sides of the powder spreading plate 301 by bolts. The top of the scraper fixing plate 302 has holes for installation, and through positioning holes are opened on both sides of the scraper fixing plate 302. A sliding groove is opened at the bottom of the scraper fixing plate 302. Circular mounting holes are opened on both sides of the inner wall of the sliding groove of the scraper fixing plate 302. A vulcanizing scraper 303 is vertically slidably connected inside the scraper fixing plate 302. A rectangular mounting hole is opened on the surface of the vulcanizing scraper 303.

[0037] Before installing the vulcanizing scraper 303, the powder spreading plate 301 and the scraper holder 1 should be aligned with their mounting holes. The powder spreading plate 301 and scraper holder 1 are then connected using bolts. Next, the vulcanizing scraper 303 is placed into the groove at the bottom of the scraper fixing plate 302. Bolts are then inserted into the rectangular mounting hole of the vulcanizing scraper 303 and the circular mounting hole of the scraper fixing plate 302, fixing the vulcanizing scraper 303 in the groove of the scraper fixing plate 302. The vulcanizing scraper 303 will fall freely under its own weight. There is no need to tighten the bolts securing the vulcanizing scraper 303 at this point. The positioning hole of the scraper fixing plate 302 is aligned with the horizontal positioning post of the powder spreading plate 301 for insertion connection. Finally, bolts are used to connect the powder spreading plate 301 to the pre-drilled holes in the scraper fixing plate 302 for installation.

[0038] Example 2

[0039] Please see Figure 1 , Figure 3 and Figure 5 This embodiment provides a technical solution: a scraper installation fixture, including: a first plate 4 and a second plate 5;

[0040] Plate 4 is vertically mounted on one side of the outer wall of the scraper holder 1. Mounting holes are provided on Plate 4, and positioning posts are welded on Plate 4. The distance from the positioning post to the bottom surface of Plate 4 is equal to the distance from the positioning post of the scraper installation in the molding chamber to the laser focal plane. Plate 5 is horizontally welded to the bottom of Plate 4, and the top of Plate 5 is in contact with the bottom of the vulcanizing scraper 303.

[0041] Align the positioning pin hole 2 on the scraper holder 1 with the positioning post on the first plate 4, and connect the scraper holder 1 to the first plate 4 with bolts. At this time, the vulcanizing scraper 303, which is not locked by bolts, can move inside the scraper fixing plate 302. When the bottom end of the vulcanizing scraper 303 contacts the second plate 5, the two sets of vulcanizing scrapers 303 will be kept on the same horizontal line. At this time, the bolts on the vulcanizing scraper 303 can be locked to fix the vulcanizing scraper 303 on the scraper fixing plate 302. Then, remove the scraper holder 1 from the first plate 4, align the positioning pin hole 2 of the scraper holder 1 with the scraper mounting positioning post in the molding chamber and fix it to ensure the stability during subsequent scraping operations.

[0042] The implementation principle of the scraper structure and scraper mounting fixture for 3D printing of this utility model is as follows:

[0043] First, before installing the vulcanizing scraper 303, the powder spreading plate 301 and the scraper holder 1 should be aligned with their mounting holes. The powder spreading plate 301 and scraper holder 1 are then connected using bolts. Next, the vulcanizing scraper 303 is placed into the groove at the bottom of the scraper fixing plate 302. Bolts are then inserted into the rectangular mounting hole of the vulcanizing scraper 303 and the circular mounting hole of the scraper fixing plate 302, fixing the vulcanizing scraper 303 in the groove of the scraper fixing plate 302. The vulcanizing scraper 303 will fall freely under its own weight. There is no need to tighten the bolts securing the vulcanizing scraper 303 at this point. The positioning hole of the scraper fixing plate 302 is aligned with the horizontal positioning post of the powder spreading plate 301 for insertion connection. Finally, bolts are used to connect the powder spreading plate 301 to the pre-drilled holes in the scraper fixing plate 302 for installation.

[0044] Next, align the positioning pin hole 2 on the scraper holder 1 with the positioning post on the first plate 4, and connect the scraper holder 1 to the first plate 4 with bolts. At this time, the vulcanizing scraper 303, which is not locked by bolts, can move inside the scraper fixing plate 302. When the bottom end of the vulcanizing scraper 303 contacts the second plate 5, the two sets of vulcanizing scrapers 303 will be kept on the same horizontal line. At this time, the bolts on the vulcanizing scraper 303 can be locked to fix the vulcanizing scraper 303 on the scraper fixing plate 302.

[0045] Finally, remove the scraper holder 1 from the first plate 4, align the positioning pin hole 2 of the scraper holder 1 with the scraper mounting positioning column in the forming chamber and fix it in place, thereby ensuring the stability during subsequent scraping operations.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A scraper structure for 3D printing, characterized in that, include: Scraper holder (1); The scraper assembly (3) is located at both ends below the scraper frame (1). The scraper assembly (3) includes a powder spreading plate (301) fixed to the bottom of the scraper frame (1) by bolts, a scraper fixing plate (302) fixed to both sides of the powder spreading plate (301) by bolts, and a vulcanizing scraper (303) vertically slidably connected inside the scraper fixing plate (302).

2. The scraper structure for 3D printing according to claim 1, characterized in that: The scraper holder (1) is in the shape of a "T" and has holes for installation.

3. The scraper structure for 3D printing according to claim 1, characterized in that: The powder-spreading plate (301) has horizontal positioning posts welded on both sides, and holes for installation are opened on the upper sides of both sides of the powder-spreading plate (301).

4. The scraper structure for 3D printing according to claim 1, characterized in that: The top of the scraper fixing plate (302) is provided with a hole for installation, the two sides of the scraper fixing plate (302) are provided with through positioning holes, the bottom of the scraper fixing plate (302) is provided with a sliding groove, and the inner walls of the sliding groove of the scraper fixing plate (302) are provided with circular mounting holes.

5. The scraper structure for 3D printing according to claim 1, characterized in that: The surface of the vulcanizing scraper (303) is provided with rectangular mounting holes.

6. The scraper structure for 3D printing according to claim 1, characterized in that: The 3D printing scraper structure also includes a positioning pin hole (2) on the scraper holder (1).

7. A scraper installation fixture, characterized in that: The scraper structure for 3D printing, as described in any one of claims 1-6, further includes: Plate No. 1 (4) is vertically set on one side of the outer wall of the scraper frame (1). The plate No. 1 (4) has an installation hole and a positioning post is welded on the plate No. 1 (4). The distance from the positioning post on the plate No. 1 (4) to the bottom surface of the plate No. 1 (4) is equal to the distance from the positioning post of the scraper installation in the forming chamber to the laser focal plane. The second plate (5) is horizontally welded to the bottom of the first plate (4), and the top of the second plate (5) is attached to the bottom of the vulcanizing scraper (303).

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