A forming cylinder with replaceable printing size and a 3D printer

Abstract

The present application relates to the technical field of metal 3D printing, and in particular to a forming cylinder and a 3D printer with replaceable printing size, which include an outer cylinder body, an inner cylinder body and a driving member, wherein the inner cylinder body is detachably arranged in the outer cylinder body, a printer plate is arranged in the inner cylinder body for lifting, and a mounting column is connected to the bottom of the printer plate; a first connecting plate and a second connecting plate are arranged in the outer cylinder body and below the inner cylinder body, the first connecting plate and the second connecting plate are detachably connected by bolts, the bottom end of the mounting column is detachably connected to the first connecting plate by a flange, and the driving member is connected to the second connecting plate for driving the second connecting plate to lift; the outer cylinder body includes a bottom plate and a plurality of outer cylinder side plates, and the bottom plate and the outer cylinder side plates, and the plurality of outer cylinder side plates are detachably connected by bolts. The present application has the effect of facilitating the processing of metal entities of different sizes.

Description

Technical Field

[0001] The present application relates to the technical field of metal 3D printing, and in particular to a forming cylinder with replaceable printing size and a 3D printer. Background Art

[0002] 3D metal printer is a scientific instrument used in physics, engineering and technology science, and mechanical engineering. It uses laser melting technology to melt metal powder to form functional solid parts. It can be used to print high-throughput metal materials. It is a fully digital rapid prototyping manufacturing process. It directly produces full high-density metal parts based on the interface data of three-dimensional CAD layering. The thickness of the melted metal layer ranges from 20 microns to 100 microns. When manufacturing parts, 3D printers need to first lay metal powder in the molding cylinder, use a scraper to evenly distribute the metal powder layer, and then melt each metal layer separately in a strictly controlled air environment to finally obtain a solid part.

[0003] In the related art, the forming cylinder includes a cylinder body and a printer plate that is lifted and arranged in the cylinder body. A lifting cylinder is arranged below the cylinder body. The piston rod of the lifting cylinder passes through the bottom wall of the cylinder body and is connected to the printer plate. The space enclosed between the printer plate and the top of the cylinder body is the printing cavity. When the forming cylinder is in use, the printer plate is raised to a position close to the top of the cylinder body by the lifting cylinder, and then the metal powder is laid into the printing cavity. The printer plate is then lowered by the lifting cylinder, thereby increasing the space of the printing cavity, and the next layer of powder is continuously laid into the printing cavity. The powder is laid layer by layer and melted, and finally a metal solid part is formed. However, the size of the cylinder body is fixed, which is not convenient for processing metal entities of different sizes. Summary of the invention

[0004] In order to facilitate the processing of metal entities of different sizes, the present application provides a forming cylinder and a 3D printer with replaceable printing sizes.

[0005] In the first aspect, the present application provides a forming cylinder with a replaceable printing size, which adopts the following technical solution: A forming cylinder with replaceable printing size, comprising an outer cylinder body, an inner cylinder body and a driving member, wherein the inner cylinder body is detachably arranged in the outer cylinder body, a printer plate is lifted and lowered in the inner cylinder body, and a mounting column is connected to the bottom of the printer plate; A first connecting plate and a second connecting plate are provided in the outer cylinder body and below the inner cylinder body, the first connecting plate and the second connecting plate are detachably connected by bolts, the bottom end of the mounting column is detachably connected to the first connecting plate via a flange, and the driving member is connected to the second connecting plate to drive the second connecting plate to rise and fall; the outer cylinder body comprises a bottom plate and a plurality of outer cylinder side plates, the bottom plate and the outer cylinder side plates, as well as the plurality of outer cylinder side plates, are detachably connected by bolts.

[0006] By adopting the above technical solution, in the present application, the space enclosed between the printer plate and the top of the inner cylinder body is the printing cavity. When the forming cylinder of the present application is used, the driving member drives the second connecting plate to rise and fall, thereby transmitting to the printer plate through the first connecting plate and the mounting plate, driving the printer plate to rise and fall. The printer plate rises to a position close to the top of the cylinder body, and then the metal powder is laid into the printing cavity, and then the printer plate is lowered by the driving member, thereby increasing the space of the printing cavity, and the next layer of powder is continuously laid into the printing cavity, and the powder is laid layer by layer and melted, and finally a metal solid part is formed.

[0007] The size of the inner cylinder body can be customized and selected according to actual conditions. When it is necessary to print metal solid parts of different sizes, one of the side panels of the outer cylinder body is removed, and then the fixation between the mounting column and the first connecting plate is released, and the original inner cylinder body is removed from the outer cylinder body, and then the inner cylinder body of the new size is installed in the original outer cylinder body. It is easy to disassemble and assemble, and is convenient for processing metal solids of different sizes.

[0008] Optionally, the bottom of the printer board is connected to the mounting column via a mounting assembly, the mounting assembly comprises a first mounting plate and a second mounting plate arranged in sequence from top to bottom, and the printer board, the first mounting plate, the second mounting plate and the mounting column are fixedly connected via bolts.

[0009] By adopting the above technical solution, the first mounting plate and the second mounting plate play a butt-jointing role to connect the printer plate and the mounting column.

[0010] Optionally, a first countersunk screw hole is opened at the four corners of the top surface of the printer board, and the first countersunk screw hole passes through the first mounting plate and extends to the interior of the second mounting plate; a plurality of second countersunk screw holes are opened on the top surface of the first mounting plate, and the plurality of second countersunk screw holes are arranged in a diamond shape, and the second countersunk screw holes extend to the interior of the second mounting plate; a plurality of third countersunk screw holes are opened on the top surface of the second mounting plate, and the plurality of third countersunk screw holes are arranged in a diamond shape, and the third countersunk screw holes extend to the interior of the top end of the mounting column; the first countersunk screw hole, the second countersunk screw hole and the third countersunk screw hole are arranged in sequence from the outside to the inside.

[0011] By adopting the above technical solution, when connecting the printer board and the mounting column, first place the second mounting plate on the top of the mounting column, and connect the second mounting plate and the mounting column as a whole through the countersunk bolts; then place the first mounting plate on the second mounting plate, connect the second mounting plate and the first mounting plate as a whole, and finally place the printer board on the first mounting plate, connect the printer board, the first mounting plate and the second mounting plate as a whole. The first countersunk screw hole, the second countersunk screw hole and the third countersunk screw hole are arranged in sequence from the outside to the inside, and when installing the countersunk bolts, they are displaced in sequence from the inside to the outside, do not interfere with each other, are easy to install and have high stability.

[0012] Optionally, a mounting ring groove is formed on the peripheral side wall of the second mounting plate, a sealing ring is embedded in the mounting ring groove, and the peripheral side wall of the sealing ring abuts against the inner side wall of the outer cylinder body.

[0013] By adopting the above technical solution, as the printer plate rises and falls in the inner cylinder body, the sealing ring can play a sealing role, thereby reducing the possibility of powder in the printing chamber falling from the bottom end of the inner cylinder body.

[0014] Optionally, the mounting ring groove passes through the top surface of the second mounting plate, and the top surface of the sealing ring abuts against the bottom surface of the first mounting plate.

[0015] By adopting the above technical solution, since the mounting ring groove passes through the top surface of the second mounting plate, when installing the sealing ring, the sealing ring can be directly inserted from the top of the second mounting plate, and then the first mounting plate is fixed above the second mounting plate. Since the top surface of the sealing ring abuts against the bottom surface of the first mounting plate, the first mounting plate automatically plays a role in limiting the top of the sealing ring.

[0016] Optionally, the inner cylinder body includes two first side plates that are opposite to each other and two second side plates that are opposite to each other, the first side plate is located between the two second side plates, and the first side plates and the second side plates are detachably connected by bolts.

[0017] By adopting the above technical solution, the processing, manufacturing and installation of the inner cylinder body are facilitated.

[0018] Optionally, the top surface of the inner cylinder body is higher than the top surface of the outer cylinder body, a fixing plate is arranged above the inner cylinder body, a through groove connected to the inner cylinder body is opened in the middle of the fixing plate, and a fixing groove for the top end of the inner cylinder body to pass through is opened on the bottom surface of the fixing plate, the inner cylinder body and the outer cylinder body are detachably connected to the fixing plate by bolts, and the bolts connecting the inner cylinder body and the outer cylinder body to the fixing plate are inserted from the top surface direction of the fixing plate.

[0019] Optionally, first mounting side ears are fixedly connected to both sides of the top end of the inner cylinder body, and the inner cylinder body is connected to the fixing plate via the first mounting side ears; second mounting side ears are fixedly connected to four sides of the top end of the outer cylinder body, and the outer cylinder body is connected to the fixing plate via the second mounting side ears.

[0020] By adopting the above technical solution, it is easy to fix the inner cylinder body and the outer cylinder body.

[0021] A 3D printer comprises the above-mentioned forming cylinder with replaceable printing size.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The size of the inner cylinder can be customized and selected according to the actual situation. When it is necessary to print metal solid parts of different sizes, one of the side panels of the outer cylinder is removed, and then the fixation between the mounting column and the first connecting plate is released, and the original inner cylinder is removed from the outer cylinder, and then the inner cylinder of the new size is installed in the original outer cylinder. It is easy to disassemble and assemble, and it is convenient to process metal solids of different sizes; 2. When connecting the printer board and the mounting column, first place the second mounting plate on the top of the mounting column, and connect the second mounting plate and the mounting column as a whole through the countersunk bolts; then place the first mounting plate on the second mounting plate, connect the second mounting plate and the first mounting plate as a whole, and finally place the printer board on the first mounting plate, and connect the printer board, the first mounting plate and the second mounting plate as a whole; the first countersunk screw hole, the second countersunk screw hole and the third countersunk screw hole are arranged in sequence from the outside to the inside, and when installing the countersunk bolts, they are displaced in sequence from the inside to the outside, do not interfere with each other, are easy to install and have high stability; 3. As the printer plate rises and falls in the inner cylinder, the sealing ring can play a sealing role, reducing the possibility of powder in the printing chamber falling from the bottom of the inner cylinder, and the sealing ring is easy and stable to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a forming cylinder with replaceable printing size according to an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure used to show the top of the inner cylinder body and the outer cylinder body after the fixing plate is hidden.

[0025] Figure 3 It is a schematic diagram of the structure inside the outer cylinder body after hiding one of the outer cylinder side panels.

[0026] Figure 4 It is a schematic diagram of the structure for displaying the interior of the inner cylinder body after hiding one of the outer cylinder side panels and one of the first side panels.

[0027] Figure 5 It is a schematic diagram for showing the structure of the inner cylinder body.

[0028] Figure 6 It is a schematic diagram for showing the installation structure of the printer board.

[0029] Figure 7 It is a structural schematic diagram used to show the connection relationship between the fixed plate, the inner cylinder body and the outer cylinder body.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. outer cylinder body; 11. bottom plate; 12. outer cylinder side plate; 13. second mounting side ear; 2. inner cylinder body; 21. first side plate; 22. second side plate; 23. fixing plate; 231. through groove; 232. fixing groove; 24. first mounting side ear; 3. driving member; 4. printer plate; 41. first countersunk screw hole; 5. mounting column; 51. flange; 6. first connecting plate; 7. second connecting plate; 8. first mounting plate; 81. second countersunk screw hole; 9. second mounting plate; 91. third countersunk screw hole; 92. mounting ring groove; 93. sealing ring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-7 This application is described in further detail.

[0032] In the first aspect, the embodiment of the present application discloses a forming cylinder with replaceable printing size: Reference Figure 1-4 , a molding cylinder with replaceable printing size, including an outer cylinder body 1, an inner cylinder body 2 and a driving member 3, the inner cylinder body 2 is detachably arranged in the outer cylinder body 1, a printer plate 4 is lifted and lowered in the inner cylinder body 2, and a mounting column 5 is connected to the bottom of the printer plate 4. A first connecting plate 6 and a second connecting plate 7 are arranged in the outer cylinder body 1 and below the inner cylinder body 2, the first connecting plate 6 and the second connecting plate 7 are detachably connected by bolts, the bottom end of the mounting column 5 is detachably connected to the first connecting plate 6 through a flange 51, and the driving member 3 is connected to the second connecting plate 7 to drive the second connecting plate 7 to lift and lower. Any driving member 3 that can realize the lifting and lowering of the second connecting plate 7 can be used, such as a lifting cylinder, a hydraulic cylinder, etc. In the embodiment of the present application, a worm gear structure is used as the driving member 3. The worm gear structure is a prior art and will not be described in detail in the present application. The outer cylinder body 1 includes a bottom plate 11 and a plurality of outer cylinder side plates 12, and the bottom plate 11 and the outer cylinder side plates 12, and the plurality of outer cylinder side plates 12 are detachably connected by bolts.

[0033] In the present application, the space enclosed between the printer plate 4 and the top of the inner cylinder body 2 is the printing cavity. When the forming cylinder of the present application is used, the driving member 3 drives the second connecting plate 7 to rise and fall, thereby transmitting to the printer plate 4 through the first connecting plate 6 and the mounting plate, driving the printer plate 4 to rise and fall. The printer plate 4 rises to a position close to the top of the cylinder body, and then the metal powder is laid into the printing cavity, and then the printer plate 4 is lowered by the driving member 3, thereby increasing the space of the printing cavity, and the next layer of powder is continued to be laid into the printing cavity, and the powder is laid layer by layer and melted, and finally a metal solid part is formed.

[0034] The size of the inner cylinder body 2 can be customized and selected according to actual conditions. When it is necessary to print metal solid parts of different sizes, one of the side panels of the outer cylinder body 1 is removed, and then the fixation between the mounting column 5 and the first connecting plate 6 is released, and the original inner cylinder body 2 is removed from the outer cylinder body 1, and then the inner cylinder body 2 of the new size is installed in the original outer cylinder body 1. It is easy to disassemble and assemble, and it is convenient to process metal solids of different sizes.

[0035] Reference Figure 4 The bottom of the printer board 4 is connected to the mounting column 5 through a mounting assembly, and the mounting assembly includes a first mounting plate 8 and a second mounting plate 9 arranged in sequence from top to bottom. The printer board 4, the first mounting plate 8, the second mounting plate 9 and the mounting column 5 are fixedly connected by bolts. The first mounting plate 8 and the second mounting plate 9 play a docking role to connect the printer board 4 and the mounting column 5.

[0036] Reference Figure 5-6 , first countersunk screw holes 41 are opened at the four corners of the top surface of the printer board 4, and the first countersunk screw holes 41 penetrate the first mounting plate 8 and extend to the inside of the second mounting plate 9; a plurality of second countersunk screw holes 81 are opened on the top surface of the first mounting plate 8, and the plurality of second countersunk screw holes 81 are arranged in a diamond shape, and the second countersunk screw holes 81 extend to the inside of the second mounting plate 9; a plurality of third countersunk screw holes 91 are opened on the top surface of the second mounting plate 9, and the plurality of third countersunk screw holes 91 are arranged in a diamond shape, and the third countersunk screw holes 91 extend to the inside of the top end of the mounting column 5; the first countersunk screw hole 41, the second countersunk screw hole 81 and the third countersunk screw hole 91 are arranged in sequence from the outside to the inside.

[0037] When connecting the printer board 4 and the mounting column 5, first place the second mounting plate 9 on the top of the mounting column 5, and connect the second mounting plate 9 and the mounting column 5 as a whole through the countersunk bolts; then place the first mounting plate 8 on the second mounting plate 9, connect the second mounting plate 9 and the first mounting plate 8 as a whole, and finally place the printer board 4 on the first mounting plate 8, and connect the printer board 4, the first mounting plate 8 and the second mounting plate 9 as a whole. The first countersunk screw hole 41, the second countersunk screw hole 81 and the third countersunk screw hole 91 are arranged in sequence from the outside to the inside, and when installing the countersunk bolts, they are displaced in sequence from the inside to the outside, do not interfere with each other, are easy to install and have high stability.

[0038] Reference Figure 4 and Figure 6-7, a mounting ring groove 92 is provided on the peripheral side wall of the second mounting plate 9, a sealing ring 93 is embedded in the mounting ring groove 92, and the peripheral side wall of the sealing ring 93 abuts against the inner side wall of the outer cylinder body 1. As the printer plate 4 rises and falls in the inner cylinder body 2, the sealing ring 93 can play a sealing role, reducing the possibility of powder in the printing chamber falling from the bottom end of the inner cylinder body 2. The mounting ring groove 92 runs through the top surface of the second mounting plate 9, and the top surface of the sealing ring 93 abuts against the bottom surface of the first mounting plate 8. Since the mounting ring groove 92 runs through the top surface of the second mounting plate 9, when installing the sealing ring 93, the sealing ring 93 can be directly inserted from the top of the second mounting plate 9, and then the first mounting plate 8 is fixed above the second mounting plate 9. Since the top surface of the sealing ring 93 abuts against the bottom surface of the first mounting plate 8, the first mounting plate 8 automatically plays a role in limiting the top of the sealing ring 93.

[0039] Reference Figure 5 The inner cylinder body 2 includes two first side panels 21 and two second side panels 22 that are oppositely arranged. The first side panel 21 is located between the two second side panels 22. The first side panel 21 and the second side panel 22 are detachably connected by bolts, which is convenient for the processing, manufacturing and installation of the inner cylinder body 2.

[0040] Reference Figure 1-3 and Figure 7 The top surface of the inner cylinder body 2 is higher than the top surface of the outer cylinder body 1. A fixing plate 23 is arranged above the inner cylinder body 2. A through groove 231 communicating with the inner cylinder body 2 is provided in the middle of the fixing plate 23. A fixing groove 232 for the top end of the inner cylinder body 2 to pass through is provided on the bottom surface of the fixing plate 23. The inner cylinder body 2 and the outer cylinder body 1 are both detachably connected to the fixing plate 23 by bolts. The bolts connecting the inner cylinder body 2 and the outer cylinder body 1 to the fixing plate 23 are inserted from the top surface direction of the fixing plate 23. The first mounting side ears 24 are fixedly connected to both sides of the top end of the inner cylinder body 2. The inner cylinder body 2 is connected to the fixing plate 23 through the first mounting side ears 24; the second mounting side ears 13 are fixedly connected to the four sides of the top end of the outer cylinder body 1. The outer cylinder body 1 is connected to the fixing plate 23 through the second mounting side ears 13, so as to facilitate the fixing of the inner cylinder body 2 and the outer cylinder body 1.

[0041] In a second aspect, the present application discloses a 3D printer: A 3D printer comprises the above-mentioned forming cylinder with replaceable printing size.

[0042] 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 forming cylinder with replaceable printing size, characterized in that: The invention comprises an outer cylinder (1), an inner cylinder (2) and a driving member (3); the inner cylinder (2) is detachably arranged in the outer cylinder (1); a printer plate (4) is lifted and arranged in the inner cylinder (2); a mounting column (5) is connected to the bottom of the printer plate (4); A first connecting plate (6) and a second connecting plate (7) are arranged inside the outer cylinder body (1) and below the inner cylinder body (2); the first connecting plate (6) and the second connecting plate (7) are detachably connected by bolts; the bottom end of the mounting column (5) is detachably connected to the first connecting plate (6) via a flange (51); the driving member (3) is connected to the second connecting plate (7) for driving the second connecting plate (7) to rise and fall; the outer cylinder body (1) comprises a bottom plate (11) and a plurality of outer cylinder side plates (12); the bottom plate (11) and the outer cylinder side plates (12) and the plurality of outer cylinder side plates (12) are detachably connected by bolts.

2. The forming cylinder with replaceable printing size according to claim 1, characterized in that: The bottom of the printer plate (4) is connected to the mounting column (5) via a mounting assembly, wherein the mounting assembly comprises a first mounting plate (8) and a second mounting plate (9) which are arranged in sequence from top to bottom, and the printer plate (4), the first mounting plate (8), the second mounting plate (9) and the mounting column (5) are fixedly connected via bolts.

3. The forming cylinder with replaceable printing size according to claim 2, characterized in that: The four corners of the top surface of the printer plate (4) are provided with first countersunk screw holes (41), which penetrate the first mounting plate (8) and extend to the inside of the second mounting plate (9); a plurality of second countersunk screw holes (81) are provided on the top surface of the first mounting plate (8), which are arranged in a rhombus shape, and the second countersunk screw holes (81) extend to the inside of the second mounting plate (9); a plurality of third countersunk screw holes (91) are provided on the top surface of the second mounting plate (9), which are arranged in a rhombus shape, and the third countersunk screw holes (91) extend to the inside of the top end of the mounting column (5); the first countersunk screw hole (41), the second countersunk screw hole (81) and the third countersunk screw hole (91) are arranged in sequence from the outside to the inside.

4. The forming cylinder with replaceable printing size according to claim 2, characterized in that: A mounting ring groove (92) is provided on the peripheral side wall of the second mounting plate (9), a sealing ring (93) is embedded in the mounting ring groove (92), and the peripheral side wall of the sealing ring (93) abuts against the inner side wall of the outer cylinder body (1).

5. The forming cylinder with replaceable printing size according to claim 4, characterized in that: The mounting ring groove (92) passes through the top surface of the second mounting plate (9), and the top surface of the sealing ring (93) abuts against the bottom surface of the first mounting plate (8).

6. The forming cylinder with replaceable printing size according to claim 1, characterized in that: The inner cylinder body (2) comprises two first side plates (21) arranged opposite to each other and two second side plates (22) arranged opposite to each other, wherein the first side plate (21) is located between the two second side plates (22), and the first side plate (21) and the second side plate (22) are detachably connected via bolts.

7. The forming cylinder with replaceable printing size according to claim 1, characterized in that: The top surface of the inner cylinder body (2) is higher than the top surface of the outer cylinder body (1); a fixing plate (23) is arranged above the inner cylinder body (2); a through groove (231) communicating with the inner cylinder body (2) is provided in the middle of the fixing plate (23); a fixing groove (232) for the top end of the inner cylinder body (2) to pass through is provided on the bottom surface of the fixing plate (23); the inner cylinder body (2) and the outer cylinder body (1) are both detachably connected to the fixing plate (23) by bolts; the bolts connecting the inner cylinder body (2) and the outer cylinder body (1) to the fixing plate (23) are inserted from the top surface of the fixing plate (23).

8. The forming cylinder with replaceable printing size according to claim 7, characterized in that: The top sides of the inner cylinder body (2) are fixedly connected with first mounting side ears (24), and the inner cylinder body (2) is connected to the fixing plate (23) via the first mounting side ears (24); the top four sides of the outer cylinder body (1) are fixedly connected with second mounting side ears (13), and the outer cylinder body (1) is connected to the fixing plate (23) via the second mounting side ears (13).

9. A 3D printer, characterized in that: A forming cylinder with replaceable printing size comprising any one of claims 1-8.

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