Forming cylinder with replaceable printing size and 3D printer

Abstract

The utility model relates to the technical field of metal 3D printing, in particular to a printing-size-replaceable forming cylinder and a 3D printer, the printing-size-replaceable forming cylinder comprises an outer cylinder body, an inner cylinder body and a driving part, the inner cylinder body is detachably arranged in the outer cylinder body, a printer plate is arranged in the inner cylinder body in a lifting mode, 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 located below the inner cylinder body, the first connecting plate and the second connecting plate are detachably connected through bolts, the bottom end of the mounting column is detachably connected with the first connecting plate through a flange plate, and the driving part is connected with the second connecting plate and used for driving the second connecting plate to ascend and descend; 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 are detachably connected through bolts, and the outer cylinder side plates are detachably connected through bolts. The machining method has the effect that metal entities of different sizes can be conveniently machined.

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

[0002] A 3D metal printer is a scientific instrument used in physics, engineering and technology science basic disciplines, and mechanical engineering field. The 3D metal printer uses laser melting technology to melt metal powder to form functional solid parts, and can be used for printing high-flux metal materials. The 3D metal printer is a full-digital rapid prototyping manufacturing process, which directly produces full high-density metal parts according to the layered interface data of three-dimensional CAD. The thickness of the melted metal layer is from 20 microns to 100 microns. Metal rapid prototyping, when the 3D printer is used to manufacture parts, metal powder needs to be laid in a forming cylinder, and a scraper is used to make the metal powder layer uniform, and then each metal layer is melted in a strictly controlled air environment, and finally a solid part is obtained.

[0003] In related technologies, the forming cylinder includes a cylinder body and a printer plate arranged in the cylinder body. A lifting cylinder is arranged below the cylinder body. A piston rod of the lifting cylinder penetrates through a bottom wall of the cylinder body and is connected with the printer plate. A space surrounded between the printer plate and the top of the cylinder body is a printing cavity. When the forming cylinder is used, the printer plate is lifted to a position close to the top of the cylinder body by the lifting cylinder, and then metal powder is laid in the printing cavity. The printer plate is lowered by the lifting cylinder, so that the space of the printing cavity is increased, and the next layer of powder is laid in the printing cavity. The layers are laid and melted, and finally a metal solid part is formed. However, the size of the cylinder body is fixed, and it is not convenient to process metal solids of different sizes. CONTENT OF THE UTILITY MODEL

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

[0005] In the first aspect, the forming cylinder with replaceable printing size provided by the present application adopts the following technical scheme:

[0006] A forming cylinder with replaceable printing size, comprising an outer cylinder body, an inner cylinder body and a driving member, the inner cylinder body is detachably arranged in the outer cylinder body, a printer plate is arranged in the inner cylinder body in a lifting manner, and a mounting column is connected to the bottom of the printer plate.

[0007] The first connecting plate and the second connecting plate are detachably connected through bolts, the bottom end of the mounting column is detachably connected with the first connecting plate through a flange plate, and the driving member is connected with the second connecting plate for driving the second connecting plate to ascend and descend.

[0008] By adopting the technical scheme, the space surrounded between the printer plate and the top of the inner cylinder is a printing cavity.

[0009] The size of the inner cylinder can be customized and selected according to actual conditions, when different sizes of metal solid parts need to be printed, one of the side plates of the outer cylinder is disassembled, then the fixing between the mounting column and the first connecting plate is released, the original inner cylinder is disassembled from the outer cylinder, and then a new size of the inner cylinder is installed in the original outer cylinder, which is convenient to disassemble and assemble and is convenient for processing metal solids of different sizes.

[0010] Optionally, the bottom of the printer plate is connected with the mounting column through a mounting assembly, the mounting assembly comprises first and second mounting plates arranged in sequence from top to bottom, and the printer plate, the first mounting plate, the second mounting plate and the mounting column are fixedly connected through bolts.

[0011] By adopting the technical scheme, the first mounting plate and the second mounting plate play the role of butt joint to connect the printer plate and the mounting column.

[0012] Optionally, first countersunk screw holes are arranged at the four corners of the top surface of the printer plate, the first countersunk screw holes penetrate the first mounting plate and extend into the interior of the second mounting plate, a plurality of second countersunk screw holes are arranged on the top surface of the first mounting plate and arranged in a rhombus shape, the second countersunk screw holes extend into the second mounting plate, a plurality of third countersunk screw holes are arranged on the top surface of the second mounting plate and arranged in a rhombus shape, the third countersunk screw holes extend into the interior of the top end of the mounting column, and the first countersunk screw holes, the second countersunk screw holes and the third countersunk screw holes are arranged in sequence from outside to inside.

[0013] By adopting the technical scheme, when the printer plate and the mounting column are connected, the second mounting plate is placed on the top end of the mounting column, the second mounting plate and the mounting column are connected into one body through the countersunk bolt, then the first mounting plate is placed on the second mounting plate, the second mounting plate and the first mounting plate are connected into one body, and finally the printer plate is placed on the first mounting plate, and the printer plate, the first mounting plate and the second mounting plate are connected into one body. The first countersunk bolt hole, the second countersunk bolt hole and the third countersunk bolt hole are sequentially arranged from outside to inside, and are sequentially staggered from inside to outside when the countersunk bolt is installed, and do not interfere with each other, so that the installation is facilitated and the stability is high.

[0014] Optionally, a mounting ring groove is formed in the circumferential side wall of the second mounting plate, and a sealing ring is embedded in the mounting ring groove, and the circumferential side wall of the sealing ring abuts against the inner side wall of the outer cylinder body.

[0015] By adopting the technical scheme, as the printer plate rises and falls in the inner cylinder body, the sealing ring can play a sealing role, and the possibility of powder falling from the bottom end of the inner cylinder body in the printing cavity is reduced.

[0016] Optionally, the mounting ring groove penetrates 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.

[0017] By adopting the technical scheme, since the mounting ring groove penetrates the top surface of the second mounting plate, when the sealing ring is installed, the sealing ring can be directly sleeved from the top of the second mounting plate, and then the first mounting plate is fixed above the second mounting plate, and 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 limiting role on the top of the sealing ring.

[0018] Optionally, the inner cylinder body comprises two oppositely arranged first side plates and two oppositely arranged second side plates, the first side plates are located between the two second side plates, and the first side plates and the second side plates are detachably connected through bolts.

[0019] By adopting the technical scheme, the processing and installation of the inner cylinder body are facilitated.

[0020] Optionally, the top surface of the inner cylinder body is higher than the top surface of the outer cylinder body, a fixed plate is arranged above the inner cylinder body, a through groove in communication with the inner cylinder body is formed in the middle of the fixed plate, a fixed groove for the top end of the inner cylinder body to pass through is formed in the bottom surface of the fixed plate, and the inner cylinder body and the outer cylinder body are detachably connected to the fixed plate through bolts, and the bolts for connecting the inner cylinder body and the outer cylinder body to the fixed plate are inserted from the top surface of the fixed plate.

[0021] Optionally, the first mounting side ears are fixedly connected to the two sides of the top end of the inner cylinder body, and the inner cylinder body is connected with the fixed plate through the first mounting side ears; the second mounting side ears are fixedly connected to the four sides of the top end of the outer cylinder body, and the outer cylinder body is connected with the fixed plate through the second mounting side ears.

[0022] By adopting the above technical scheme, the fixing of the inner cylinder body and the outer cylinder body is facilitated.

[0023] A 3D printer comprises the replaceable forming cylinder with variable printing size.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The size of the inner cylinder body can be customized and selected according to actual conditions. When different sizes of metal solid parts need to be printed, one of the side plates of the outer cylinder body is disassembled, the fixing between the mounting column and the first connecting plate is released, the original inner cylinder body is disassembled from the outer cylinder body, and then a new size of the inner cylinder body is installed in the original outer cylinder body. The disassembly and assembly are convenient, and different sizes of metal solids can be processed.

[0026] 2. When connecting the printer plate and the mounting column, the second mounting plate is placed on the top end of the mounting column, and the second mounting plate and the mounting column are connected as a whole through the countersunk head bolts; then the first mounting plate is placed on the second mounting plate, and the second mounting plate and the first mounting plate are connected as a whole, and finally the printer plate is placed on the first mounting plate, and the printer plate, the first mounting plate and the second mounting plate are connected as a whole; the first countersunk head screw hole, the second countersunk head screw hole and the third countersunk head screw hole are arranged from outside to inside, and are sequentially staggered from inside to outside when the countersunk head bolts are installed, and do not interfere with each other, which is convenient for installation and has high stability.

[0027] 3. With the lifting of the printer plate in the inner cylinder body, the sealing ring can play a sealing role, reducing the possibility of powder falling from the bottom end of the inner cylinder body in the printing cavity, and the sealing ring is convenient and stable to install. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a whole structure schematic diagram of a replaceable forming cylinder with variable printing size according to an embodiment of the present application.

[0029] Figure 2 is a structure schematic diagram for showing the top of the inner cylinder body and the outer cylinder body after hiding the fixed plate.

[0030] Figure 3 is a structure schematic diagram for showing the inside of the outer cylinder body after hiding one of the outer cylinder side plates.

[0031] Figure 4 is a structure schematic diagram for showing the inside of the inner cylinder body after hiding one of the outer cylinder side plates and one of the first side plates.

[0032] Figure 5 is a structural schematic view for showing the inner cylinder.

[0033] Figure 6 is a structural schematic view for showing the mounting structure of the printer plate.

[0034] Figure 7 is a structural schematic view for showing the connection relationship between the fixing plate, the inner cylinder and the outer cylinder.

[0035] Mark explanation: 1, outer cylinder; 11, bottom plate; 12, outer cylinder side plate; 13, second mounting side ear; 2, inner cylinder; 21, first side plate; 22, second side plate; 23, fixing plate; 231, through slot; 232, fixing groove; 24, first mounting side ear; 3, driving piece; 4, printer plate; 41, first countersunk hole; 5, mounting column; 51, flange; 6, first connecting plate; 7, second connecting plate; 8, first mounting plate; 81, second countersunk hole; 9, second mounting plate; 91, third countersunk hole; 92, mounting ring groove; 93, sealing ring. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-7 The application is further described in detail.

[0037] In a first aspect, the embodiments of the application disclose a replaceable printing size forming cylinder:

[0038] Reference Figures 1-4 The replaceable printing size forming cylinder comprises an outer cylinder 1, an inner cylinder 2 and a driving piece 3, the inner cylinder 2 is detachably arranged in the outer cylinder 1, a printer plate 4 is arranged in the inner cylinder 2 in a lifting manner, 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 1 and below the inner cylinder 2, the first connecting plate 6 and the second connecting plate 7 are detachably connected through 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 piece 3 is connected to the second connecting plate 7 for driving the second connecting plate 7 to lift, any driving piece 3 capable of realizing the lifting of the second connecting plate 7 can be used, such as a lifting cylinder, a hydraulic oil cylinder and the like, and a worm gear structure is used as the driving piece 3 in the embodiments of the application, which is a prior art and will not be described herein. The outer cylinder 1 comprises 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 through bolts.

[0039] In the present application, the space 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 in use, the driving member 3 drives the second connecting plate 7 to rise, which is then transmitted to the printer plate 4 through the first connecting plate 6 and the mounting plate, thereby driving the printer plate 4 to rise. The printer plate 4 rises to a position close to the top of the cylinder body, and then the metal powder is laid in the printing cavity. The printer plate 4 is then lowered by the driving member 3, thereby increasing the space of the printing cavity and continuing to lay the next layer of powder in the printing cavity. The layers are laid and fused one by one, and finally a metal solid part is formed.

[0040] 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 plates of the outer cylinder body 1 is disassembled, the fixing between the mounting column 5 and the first connecting plate 6 is released, the original inner cylinder body 2 is disassembled from the outer cylinder body 1, and then a new size of the inner cylinder body 2 is installed in the original outer cylinder body 1. The disassembly and assembly are convenient, and it is convenient to process metal solids of different sizes.

[0041] Referring to Figure 4 The bottom of the printer plate 4 is connected with the mounting column 5 through a mounting assembly, which includes the first mounting plate 8 and the second mounting plate 9 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 through bolts. The first mounting plate 8 and the second mounting plate 9 play the role of butt joint to connect the printer plate 4 and the mounting column 5.

[0042] Referring to Figures 5-6 A first countersunk hole 41 is formed at the top surface of the printer plate 4 at the four corners, the first countersunk hole 41 penetrates the first mounting plate 8 and extends to the inside of the second mounting plate 9; a plurality of second countersunk holes 81 are formed on the top surface of the first mounting plate 8, the plurality of second countersunk holes 81 are arranged in a rhombus shape, and the second countersunk holes 81 extend to the inside of the second mounting plate 9; a plurality of third countersunk holes 91 are formed on the top surface of the second mounting plate 9, the plurality of third countersunk holes 91 are arranged in a rhombus shape, and the third countersunk holes 91 extend to the inside of the top end of the mounting column 5; the first countersunk hole 41, the second countersunk hole 81 and the third countersunk hole 91 are arranged in sequence from outside to inside.

[0043] When connecting the printer plate 4 and the mounting column 5, the second mounting plate 9 is first placed on the top end of the mounting column 5, and the second mounting plate 9 and the mounting column 5 are connected as a whole through countersunk bolts; then the first mounting plate 8 is placed on the second mounting plate 9, and the second mounting plate 9 and the first mounting plate 8 are connected as a whole, and finally the printer plate 4 is placed on the first mounting plate 8, and the printer plate 4, the first mounting plate 8 and the second mounting plate 9 are connected as a whole. The first countersunk hole 41, the second countersunk hole 81 and the third countersunk hole 91 are arranged in sequence from outside to inside, and are arranged in sequence from inside to outside when the countersunk bolts are installed, without interfering with each other, which is convenient for installation and has high stability.

[0044] With reference to Figure 4 and Figures 6-7 , the peripheral side wall of the second mounting plate 9 is provided with a mounting ring groove 92, and 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. With the lifting of the printer plate 4 in the inner cylinder body 2, the sealing ring 93 can play a sealing role to reduce the possibility of powder falling from the bottom end of the inner cylinder body 2 in the printing cavity. The mounting ring groove 92 penetrates 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 penetrates through the top surface of the second mounting plate 9, when the sealing ring 93 is mounted, the sealing ring 93 can be directly sleeved 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 limiting role on the top of the sealing ring 93.

[0045] With reference to Figure 5 , the inner cylinder body 2 includes two oppositely arranged first side plates 21 and two oppositely arranged second side plates 22, and the first side plates 21 are located between the two second side plates 22. The first side plates 21 and the second side plates 22 are detachably connected through bolts, which facilitates the machining and installation of the inner cylinder body 2.

[0046] With reference to Figures 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, and a fixing plate 23 is arranged above the inner cylinder body 2. A through groove 231 in communication with the inner cylinder body 2 is formed in the middle portion of the fixing plate 23, and a fixing groove 232 for the top end of the inner cylinder body 2 to pass through is formed in the bottom surface of the fixing plate 23. The inner cylinder body 2 and the outer cylinder body 1 are detachably connected to the fixing plate 23 through bolts, and the bolts for 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. The two sides of the top end of the inner cylinder body 2 are fixedly connected with first mounting side ears 24, and the inner cylinder body 2 is connected with the fixing plate 23 through the first mounting side ears 24. The four sides of the top end of the outer cylinder body 1 are fixedly connected with second mounting side ears 13, and the outer cylinder body 1 is connected with the fixing plate 23 through the second mounting side ears 13, which facilitates the fixation of the inner cylinder body 2 and the outer cylinder body 1.

[0047] In a second aspect, the embodiments of the present application disclose a 3D printer:

[0048] The 3D printer comprises the above-mentioned forming cylinder with replaceable printing size.

[0049] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A replaceable print size forming cylinder characterized by: Including outer cylinder (1), inner cylinder (2) and driving part (3), the inner cylinder (2) is detachably arranged in the outer cylinder (1), the printer board (4) is arranged in the inner cylinder (2), the bottom of the printer board (4) is connected with the mounting column (5); The first connecting plate (6) and the second connecting plate (7) are arranged in the outer cylinder (1) and below the inner cylinder (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 with the first connecting plate (6) through the flange (51), and the driving part (3) is connected with the second connecting plate (7) for driving the second connecting plate (7) to lift, the outer cylinder (1) comprises 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.

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

3. A replaceable print size forming cylinder according to claim 2, characterized in that: First countersunk hole (41) is arranged at the four corners of the top surface of the printer board (4), the first countersunk hole (41) penetrates the first mounting plate (8) and extends to the inside of the second mounting plate (9), a plurality of second countersunk holes (81) are arranged on the top surface of the first mounting plate (8), the second countersunk holes (81) are arranged in a diamond shape, the second countersunk holes (81) extend to the inside of the second mounting plate (9), a plurality of third countersunk holes (91) are arranged on the top surface of the second mounting plate (9), the third countersunk holes (91) are arranged in a diamond shape, and the third countersunk holes (91) extend to the inside of the top end of the mounting column (5), the first countersunk hole (41), the second countersunk hole (81) and the third countersunk hole (91) are arranged in sequence from outside to inside.

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

5. A replaceable print size forming cylinder according to claim 4, characterized in that: The mounting ring groove (92) penetrates 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. A replaceable print size forming cylinder according to claim 1, characterized in that: The inner cylinder (2) comprises two oppositely arranged first side plates (21) and two oppositely arranged second side plates (22), 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 by bolts.

7. A replaceable printing dimension forming cylinder according to claim 1, characterized in that: The top surface of the inner cylinder (2) is higher than the top surface of the outer cylinder (1), the upper portion of the inner cylinder (2) is provided with a fixing plate (23), the middle portion of the fixing plate (23) is provided with a through slot (231) communicated with the inner cylinder (2), the bottom surface of the fixing plate (23) is provided with a fixing slot (232) for the top end of the inner cylinder (2), and the inner cylinder (2) and the outer cylinder (1) are detachably connected to the fixing plate (23) through bolts.

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

9. A 3D printer characterized by: The replaceable printing size forming cylinder comprises the replaceable printing size forming cylinder according to any one of claims 1-8.

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