Powder spreading scraper assembly and metal additive manufacturing equipment thereof

Abstract

The utility model relates to the technical field of metal additive manufacturing, and provides a powder laying scraper assembly which comprises a mounting cross beam, a mounting piece and a scraping strip. The mounting piece comprises a mounting plate and a pressing plate; the mounting plate is detachably connected to the mounting cross beam, and the pressing plate is detachably connected to one side of the mounting plate; the scraping strip is tightly pressed between the mounting plate and the pressing plate, and the lower end of the scraping strip protrudes out of the mounting plate and the pressing plate and is located below the mounting cross beam; wherein the scraping strips are symmetrically arranged up and down. Therefore, the use cost of the powder spreading scraper assembly can be reduced. In addition, the utility model further provides metal additive manufacturing equipment.

Description

Technical Field

[0001] The present application relates to the field of metal additive manufacturing, and in particular to a powder spreading scraper assembly and a metal additive manufacturing device thereof. Background Art

[0002] At present, the powder scraper assembly is a relatively important part of metal additive manufacturing equipment. During the operation of the metal additive manufacturing equipment, the linear motion mechanism drives the powder scraper assembly to move linearly to spread the metal powder from the powder feeding cylinder to the forming table of the forming cylinder, thereby forming a powder layer of a certain thickness.

[0003] Among them, the scraper bar in the powder spreading scraper assembly realizes the spreading of metal powder. Since the scraper bar is in contact with the metal powder, the scraper bar is prone to wear. When the scraper bar is worn to a certain extent, in order to ensure the quality of powder spreading, it is usually necessary to replace it with a new scraper bar, which leads to high cost of use, so it needs to be improved. Utility Model Content

[0004] In order to reduce the use cost of a powder spreading scraper assembly, in a first aspect, the present application provides a powder spreading scraper assembly.

[0005] The present application provides a powder spreading scraper assembly adopting the following technical solution:

[0006] A powder spreading scraper assembly comprises a mounting beam, a mounting member and a scraper strip; the mounting member comprises a mounting plate and a pressure plate; the mounting plate is detachably connected to the mounting beam, and the pressure plate is detachably connected to one side of the mounting plate; the scraper strip is pressed between the mounting plate and the pressure plate, and the lower end of the scraper strip protrudes from the mounting plate and the pressure plate and is located below the mounting beam; wherein the scraper strip is symmetrically arranged up and down.

[0007] By adopting the above technical solution, in actual applications, the installation beam is used for installation of the mounting parts and cooperates with the linear motion mechanism, so that the lower end of the scraper bar spreads the metal powder; wherein, when the lower end of the scraper bar is worn to a certain extent, the mounting plate is first removed from the mounting beam, and then the pressure plate is removed from the mounting plate. Since the scraper bar is pressed tightly between the mounting plate and the pressure plate, the scraper bar can be disassembled, and the scraper bar is symmetrically arranged up and down, and the upper and lower ends of the scraper bar are swapped, and the scraper bar can continue to be used without immediate replacement, thereby reducing the use cost of the powder scraper assembly.

[0008] Preferably, a positioning groove is provided on one side of the mounting plate close to the pressing plate along its length direction, and a positioning strip is provided on one side of the pressing plate close to the mounting plate along its length direction, and the positioning strip is embedded in the positioning groove.

[0009] By adopting the above technical solution, by providing the positioning groove and the positioning strip, the positioning installation between the pressing plate and the mounting plate is realized, thereby facilitating the installation of the scraper strip.

[0010] Preferably, a mounting groove is provided on one side of the mounting plate close to the scraper strip along its length direction, and a positioning mounting portion is provided on one side of the scraper strip close to the mounting plate along its length direction, and the positioning mounting portion is embedded in the mounting groove.

[0011] By adopting the above technical solution and providing the installation groove and the positioning installation portion, the scraper strip can be positioned and installed in the installation plate, thereby facilitating the installation of the scraper strip.

[0012] Preferably, a clamping groove is provided on one side of the pressure plate close to the scraper strip along its length direction, and an arc-shaped clamping portion is provided on one side of the scraper strip close to the pressure plate along its length direction, and the clamping portion is embedded and clamped in the clamping groove.

[0013] By adopting the above technical solution and providing the pressing groove and the pressing portion, the scraper strip is pressed more tightly between the mounting plate and the pressing plate, so as to improve the stability of the scraper strip installation.

[0014] Preferably, the mounting crossbeam is provided with a slide groove, and the mounting plate can be slidably arranged in the slide groove along the vertical direction.

[0015] By adopting the above technical solution and setting the slide groove, the mounting plate can be slidably arranged in the slide groove along the vertical direction to adjust the height position of the scraper strip, thereby adjusting the gap between the scraper strip and the forming table.

[0016] Preferably, the mounting member also includes a connecting plate and two adjusting screws, the connecting plate being detachably connected to the mounting beam, the mounting plate being arranged on the lower side of the connecting plate, the two adjusting screws being spaced apart along the length direction of the connecting plate and being arranged on the upper side of the connecting plate, the adjusting screws being threadedly connected to the connecting plate and rotatably connected to the mounting plate.

[0017] By adopting the above technical solution, by setting a connecting plate and two adjusting screws, the connecting plate can be detachably connected to the mounting beam, so that the mounting plate can be detachably connected to the mounting beam, and by rotating the two adjusting screws, the mounting plate can slide in the slide groove, and the parallelism between the scraper strip and the forming table can be adjusted.

[0018] Preferably, the mounting member further comprises a handle, and the handle is arranged on the upper side of the connecting plate.

[0019] By adopting the above technical solution and providing a handle, it is easy to take and place the entire powder spreading scraper assembly.

[0020] Preferably, a reinforcement plate is provided on one side of the mounting beam.

[0021] By adopting the above technical solution and providing a reinforcing plate, the overall supporting strength of the installation beam can be improved.

[0022] Preferably, the scraper strip is made of silicone material.

[0023] By adopting the above technical solution, the scraper strip is made of silicone material, that is, the scraper strip has a higher hardness and is resistant to high temperatures, thereby increasing the service life of the scraper strip.

[0024] In a second aspect, the present application provides a metal additive manufacturing device.

[0025] The metal additive manufacturing equipment provided in this application adopts the following technical solution:

[0026] A metal additive manufacturing device comprises the powder spreading scraper assembly described above.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the lower end of the scraper strip is worn to a certain extent, first remove the mounting plate from the mounting beam, and then remove the pressure plate from the mounting plate. Since the scraper strip is pressed between the mounting plate and the pressure plate, the scraper strip can be removed. In addition, the scraper strip is designed to be symmetrical up and down. The upper and lower ends of the scraper strip can be swapped, and the scraper strip can continue to be used without immediate replacement, thereby reducing the use cost of the powder scraper assembly;

[0029] 2. By setting a slide groove, the mounting plate can be slidably arranged in the slide groove in the vertical direction to adjust the height position of the scraper strip, thereby adjusting the gap between the scraper strip and the forming table;

[0030] 3. By setting a connecting plate and two adjusting screws, the connecting plate can be detachably connected to the mounting beam, so that the mounting plate can be detachably connected to the mounting beam. By rotating the two adjusting screws, the mounting plate can slide in the slide groove, and the parallelism between the scraper strip and the forming table can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the powder spreading scraper assembly in the embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the exploded structure of the powder spreading scraper assembly in the embodiment of the present application;

[0033] Figure 3 It is a partial structural schematic diagram of the powder spreading scraper assembly in an embodiment of the present application;

[0034] Figure 4It is a schematic diagram of the overall structure of the scraper strip in the embodiment of the present application.

[0035] Figure numerals: 1. Mounting beam; 11. Slide groove; 12. Reinforcing plate; 2. Mounting piece; 21. Mounting plate; 211. Positioning groove; 212. Mounting groove; 22. Pressing plate; 221. Positioning strip; 222. Pressing groove; 23. Connecting plate; 24. Adjusting screw; 25. Differential head; 26. Handle; 3. Scraper strip; 31. Positioning and mounting portion; 32. Pressing portion; 33. Chamfer. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The following is combined with Figure 1-4 This application is described in further detail.

[0039] The embodiment of the present application discloses a powder spreading scraper assembly.

[0040] Reference Figure 1 and Figure 2 The powder spreading scraper assembly includes a mounting beam 1, a mounting member 2 and a scraping strip 3. The mounting beam 1 is arranged in an "L"-shaped plate shape, wherein the mounting member 2 includes a mounting plate 21 and a pressing plate 22. The mounting plate 21 is detachably connected to the mounting beam 1, and the pressing plate 22 is detachably connected to one side of the mounting plate 21. In this embodiment, the pressing plate 22 is bolted to the mounting beam 1. In other embodiments, the pressing plate 22 can also be detachably connected to the mounting plate 21 by means of a snap connection, a plug connection or other connecting members. The scraping strip 3 is pressed between the mounting plate 21 and the pressing plate 22, and the lower end of the scraping strip 3 protrudes from the mounting plate 21 and the pressing plate 22 and is located below the mounting beam 1.

[0041] When the powder spreading scraper assembly is working, the mounting crossbeam 1 is connected to the linear motion mechanism, so that the linear motion mechanism drives the scraper bar 3 to move, so that the lower end of the scraper bar 3 spreads the metal powder on the forming table. Among them, the scraper bar 3 is designed to be symmetrical up and down. When the lower end of the scraper bar 3 is worn to a certain extent, the mounting plate 21 is first disassembled from the mounting crossbeam 1, and then the pressing plate 22 is disassembled from the mounting plate 21. Since the scraper bar 3 is pressed tightly between the mounting plate 21 and the pressing plate 22, the scraper bar 3 is disassembled. At this time, the upper and lower ends of the scraper bar 3 are swapped, and the scraper bar 3 can continue to be used without immediate replacement, thereby reducing the use cost of the powder spreading scraper assembly.

[0042] Reference Figure 3 In some embodiments, a positioning groove 211 is provided on one side of the mounting plate 21 close to the pressing plate 22. The cross-section of the positioning groove 211 is rectangular and is arranged along the length direction of the mounting plate 21. A positioning strip 221 is formed on one side of the pressing plate 22 close to the mounting plate 21 along its own length direction. The shape of the positioning strip 221 is adapted to the positioning groove 211 so that the positioning strip 221 is embedded in the positioning groove 211 to realize the positioning installation between the pressing plate 22 and the mounting plate 21, thereby facilitating the installation of the scraper strip 3.

[0043] Reference Figure 3 and Figure 4 In some embodiments, a mounting groove 212 is provided on one side of the mounting plate 21 close to the scraper strip 3. The cross-section of the mounting groove 212 is rectangular and is arranged along the length direction of the mounting plate 21. A positioning mounting portion 31 is protruded along the length direction of the scraper strip 3 on one side of the mounting plate 21 close to the mounting plate 21. The positioning mounting portion 31 is arranged in a rectangular strip shape and is embedded in the mounting groove 212. When installing the scraper strip 3, the positioning mounting portion 31 is first embedded in the mounting groove 212 to realize the positioning pre-fixation of the scraper strip 3, and then the pressure plate 22 is installed on the mounting plate 21, so that the installation of the scraper strip 3 is accurate and simple.

[0044] In some embodiments, a clamping groove 222 is provided on one side of the pressure plate 22 close to the scraper strip 3, and the clamping groove 222 is arranged along the length direction of the pressure plate 22. The scraper strip 3 protrudes along its own length direction on one side of the pressure plate 22 close to the pressure plate 22 to form a strip-shaped clamping portion 32. The cross-section of the clamping portion 32 is arranged in an arc shape, and the shape of the clamping groove 222 is adapted to the clamping portion 32, so that the clamping portion 32 is embedded and clamped in the clamping groove 222, so that the scraper strip 3 is more tightly clamped between the mounting plate 21 and the pressure plate 22, thereby improving the stability of the installation of the scraper strip 3.

[0045] In some embodiments, the scraper strip 3 is made of a silicone material, and its hardness is close to HV70, that is, the scraper strip 3 has a high hardness and a strong high temperature resistance, thereby increasing the service life of the scraper strip 3. It should be noted that chamfers 33 are provided on both sides of the upper and lower ends of the scraper strip 3, so that the scraper strip 3 is more uniform during the powder spreading process and reduces the occurrence of powder jamming.

[0046] Reference Figure 2 In some embodiments, a through slide groove 11 is opened on the lower side of the mounting groove 212 in the vertical direction, and the mounting plate 21 can be slidably arranged in the slide groove 11, and the sliding direction is the vertical direction. By sliding the mounting plate 21, the scraper strip 3 is driven to slide, thereby adjusting the height position of the scraper strip 3. The gap between the scraper strip 3 and the forming table can be adjusted according to different work requirements, thereby improving the powder spreading effect.

[0047] Reference Figure 1 and Figure 2 In some embodiments, the mounting member 2 further includes a connecting plate 23 and two adjusting screws 24. The connecting plate 23 is located above the slide slot 11 and is detachably connected to the mounting beam 1 by bolt locking. The mounting plate 21 is limited to the lower side of the connecting plate 23. In this way, the mounting plate 21 is detachably connected to the mounting beam 1, that is, the mounting member 2 is detachably connected to the mounting beam 1 as a whole, so that the scraper strip 3 in the mounting member 2 can be removed. The two adjusting screws 24 are arranged at intervals along the length direction of the connecting plate 23 and are located at both ends of the upper side of the connecting plate 23. Each adjusting screw 24 is threadedly connected to the connecting plate 23 and the lower end is rotationally limited in the mounting plate 21. By rotating the two adjusting screws 24, the mounting plate 21 can be driven to slide along the slide slot 11 to adjust the height of the scraper strip 3. According to the actual situation, by rotating one of the adjusting screws 24, the parallelism between the scraper strip 3 and the forming table can be adjusted. It should be noted that the mounting member 2 further includes two micrometer heads 25 , which are arranged corresponding to the two adjusting screws 24 . The micrometer heads 25 are used to fine-tune the adjusting screws 24 , thereby fine-tuning the height and levelness of the scraper strip 3 .

[0048] In some embodiments, the mounting member 2 further includes a handle 26, which is fixedly connected to the upper side of the connecting plate 23 to facilitate the removal and placement of the powder spreading scraper assembly as a whole.

[0049] In some embodiments, a reinforcing plate 12 is bolted to one side of the mounting beam 1, and the reinforcing plate 12 is arranged in a triangular plate shape to improve the overall supporting strength of the mounting beam 1, thereby ensuring the stability of the powder scraper assembly during use.

[0050] The implementation principle of this embodiment is: when the powder spreading scraper assembly is working, the mounting crossbeam 1 is connected to the linear motion mechanism, so that the linear motion mechanism drives the scraper bar 3 to move, so that the lower end of the scraper bar 3 spreads the metal powder on the forming table. Among them, the scraper bar 3 is symmetrically arranged up and down. When the lower end of the scraper bar 3 is worn to a certain extent, the mounting plate 21 is first disassembled from the mounting crossbeam 1, and then the pressing plate 22 is disassembled from the mounting plate 21. Since the scraper bar 3 is pressed between the mounting plate 21 and the pressing plate 22, the scraper bar 3 is disassembled. At this time, the upper and lower ends of the scraper bar 3 are swapped, and the scraper bar 3 can continue to be used without immediate replacement, thereby reducing the use cost of the powder spreading scraper assembly.

[0051] The embodiment of the present application also discloses a metal additive manufacturing device.

[0052] The metal additive manufacturing equipment includes the powder spreading scraper assembly described in the above embodiment.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A powder spreading scraper assembly, characterized in that: The invention comprises a mounting crossbeam (1), a mounting member (2) and a scraper strip (3); the mounting member (2) comprises a mounting plate (21) and a pressure plate (22); the mounting plate (21) is detachably connected to the mounting crossbeam (1), and the pressure plate (22) is detachably connected to one side of the mounting plate (21); the scraper strip (3) is pressed between the mounting plate (21) and the pressure plate (22), and the lower end of the scraper strip (3) protrudes from the mounting plate (21) and the pressure plate (22) and is located below the mounting crossbeam (1); wherein the scraper strip (3) is symmetrically arranged up and down.

2. A powder spreading scraper assembly according to claim 1, characterized in that: A positioning groove (211) is provided on one side of the mounting plate (21) close to the pressing plate (22) along its length direction, and a positioning strip (221) is provided on one side of the pressing plate (22) close to the mounting plate (21) along its length direction, and the positioning strip (221) is embedded in the positioning groove (211).

3. A powder spreading scraper assembly according to claim 1 or 2, characterized in that: A mounting groove (212) is provided on one side of the mounting plate (21) close to the scraper strip (3) along its length direction, and a positioning mounting portion (31) is provided on one side of the scraper strip (3) close to the mounting plate (21) along its length direction, and the positioning mounting portion (31) is embedded in the mounting groove (212).

4. A powder spreading scraper assembly according to claim 3, characterized in that: A clamping groove (222) is provided on one side of the pressure plate (22) close to the scraper strip (3) along its length direction, and an arc-shaped clamping portion (32) is provided on one side of the scraper strip (3) close to the pressure plate (22) along its length direction, and the clamping portion (32) is embedded and clamped in the clamping groove (222).

5. The powder spreading scraper assembly according to claim 1, characterized in that: The installation crossbeam (1) is provided with a slide groove (11), and the installation plate (21) is slidably arranged in the slide groove (11) along a vertical direction.

6. A powder spreading scraper assembly according to claim 5, characterized in that: The mounting member (2) further comprises a connecting plate (23) and two adjusting screws (24); the connecting plate (23) is detachably connected to the mounting crossbeam (1); the mounting plate (21) is arranged on the lower side of the connecting plate (23); the two adjusting screws (24) are arranged at intervals along the length direction of the connecting plate (23) and are arranged on the upper side of the connecting plate (23); the adjusting screws (24) are threadedly connected to the connecting plate (23) and are rotatably connected to the mounting plate (21).

7. A powder spreading scraper assembly according to claim 6, characterized in that: The mounting member (2) further comprises a handle (26), wherein the handle (26) is arranged on the upper side of the connecting plate (23).

8. The powder spreading scraper assembly according to claim 1, characterized in that: A reinforcing plate (12) is provided on one side of the mounting crossbeam (1).

9. The powder spreading scraper assembly according to claim 1, characterized in that: The scraper strip (3) is made of silicone material.

10. A metal additive manufacturing device, characterized in that: It comprises a powder spreading scraper assembly as described in any one of claims 1-9.

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