Cylinder chassis assembly structure and cylinder device

Abstract

The present invention discloses a cylinder chassis assembly structure and a cylinder device. The chassis assembly is arranged in the cylinder barrel. The chassis assembly includes a support disc and an electromagnet disc. The support disc has the characteristic of being adsorbed by a magnet. The sizes of the support disc and the electromagnet disc are both adapted to the cylinder barrel. The support disc is arranged on the top of the electromagnet disc. The electromagnet disc realizes adsorption or release of the support disc by energizing and discharging. The design adopts electromagnetic adsorption to realize adsorption and release of the support disc. The operation is simple and fast, and the disc will not be damaged. The design can effectively prevent powder from leaking from the support disc, and can also effectively prevent the phenomenon of pulling the cylinder and damaging the disc and the cylinder barrel wall.

Description

Technical Field

[0001] The invention relates to the field of 3D printer accessories, and in particular to a cylinder chassis component structure and a cylinder device applied to a 3D printer. Background Art

[0002] 3D printers have the characteristics of fast molding and high production precision. The raw materials are powdered, and the products are manufactured by printing layer by layer, which is not easy to cause material waste. According to the type of materials and their use, there are 3D printing devices of different types, such as fused deposition modeling, laser stereolithography and selective laser sintering. Among them, 3D printing devices using selective laser sintering are more common.

[0003] Common types include 3D printing devices using SLS selective laser sintering and SLM selective laser melting. Both types belong to 3D printing technologies that use laser as an energy medium. Among the two types, compared with SLS selective laser sintering, SLM uses laser to completely melt the powder during the additive manufacturing process, does not require a binder, and has better molding accuracy and mechanical properties than SLS. Therefore, compared with SLS selective laser sintering, it has better application prospects in certain fields, such as in the fields of medicine, automobiles, aerospace, etc.

[0004] For SLM type 3D printers, they usually include a feeding device, a molding device, a powder spreading device, a laser device and a powder recovery device. Among them, the cylinder of the molding device, because it is the molding area of ​​the product, needs to provide a support surface for the product during the printing process. At the same time, the printed product needs to be transferred. The chassis of the existing solution is usually installed and fixed by bolts, etc., which is inconvenient during installation and removal. The existing solution of directly transferring the product by hand or tools is easy to damage the product that has just been printed. At the same time, due to the influence of the force of each installation, the chassis will cause certain damage, and manual installation may also cause the chassis surface to tilt. Summary of the invention

[0005] The object of the present invention is to provide a cylinder chassis assembly structure and a cylinder device to address the above-mentioned problems, so as to provide an entire working surface for the printing process, while solving the problem of quick installation and removal of the support disc and easy damage during the installation process.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A cylinder chassis assembly structure, the chassis assembly is arranged in the cylinder barrel, the chassis assembly includes a support disc and an electromagnet disc, the support disc has the characteristic of being adsorbed by a magnet; the sizes of the support disc and the electromagnet disc are both adapted to the cylinder barrel; the support disc is arranged on the top of the electromagnet disc, and the electromagnet disc realizes adsorption or release of the support disc by energizing and discharging.

[0008] This design uses electromagnetic adsorption to install the support plate, which is fast and efficient. At the same time, this method abandons the bolt installation method, is not affected by manpower and installation tools, and will not be damaged.

[0009] Furthermore, a positioning hole-positioning column structure is designed between the supporting disk and the electromagnet disk.

[0010] The support plate can be quickly installed and positioned using the positioning hole-positioning column structure.

[0011] Furthermore, the supporting plate comprises a chassis and an adsorption member, wherein the chassis does not have the property of being adsorbed by a magnet, and the adsorption member can be adsorbed by a magnet, and the adsorption member is embedded in the chassis.

[0012] In this way, the supporting disc not only meets the characteristic of not having magnetic adsorption on the powder side, but also can be adsorbed by the electromagnet disc.

[0013] Furthermore, the bottom of the chassis is designed with a mounting groove matching the adsorption member, and the adsorption member is fixed in the mounting groove, that is, a mounting structure of the adsorption member is designed, and this structure can quickly complete the assembly of the support plate member.

[0014] Furthermore, the electromagnet disk component includes a positioning disk, a heat insulation disk and a connecting disk which are connected in sequence from top to bottom, and at least one circle of wool felt is arranged on the side of the positioning disk; a number of electromagnets are evenly distributed inside the positioning disk; the heat insulation disk is made of heat insulation material, and a wire passing groove is arranged inside the heat insulation disk; matching wire harness holes are designed on the heat insulation disk and the connecting disk; at least one sealing ring is arranged on the side of the connecting disk.

[0015] The positioning plate has the function of positioning and adsorption for the supporting plate (completed by the electromagnet), the heat insulation plate isolates the heat transfer at both ends to prevent mutual influence, the connection plate serves as a connection window between the chassis assembly and the outside (such as the drive mechanism), and the power line of the electromagnet is routed through the wiring harness holes of the connection plate and the heat insulation plate and connected to the electromagnet. The wool felt has density and strong compressibility. Due to the dense fine wool felt, it can effectively prevent the powder from continuing to move down. Its structure contains a large number of dense gaps. Even if a small amount of powder falls into the gap between the wool felt and the cylinder wall, it will not cause strain to the cylinder wall and the discs during the up and down movement due to excessive pressure.

[0016] Furthermore, a positioning hole-positioning column structure is designed between the positioning plate and the supporting plate.

[0017] Furthermore, the heat-insulating plate is provided with countersunk holes corresponding to the electromagnets, the bottoms of the electromagnets are fixed in the corresponding countersunk holes, and the countersunk holes are connected to the wire grooves. This design can make more efficient use of limited space, and the wiring harness is fixed inside the structure through an independent space, thereby avoiding the influence of the wiring harness during the movement of the chassis assembly.

[0018] Furthermore, the electromagnet is a power-off holding type magnet. The support disk needs to be removed only when printing is finished, and needs to be fixed on the electromagnet disk during operation. The power-off holding type magnet loses its magnetism only when power is supplied, that is, the frequency of powering on the chassis assembly becomes very low due to the selection of the power-off holding type magnet.

[0019] In order to solve the above problem, the present invention also provides a cylinder device, which applies the above cylinder chassis assembly structure, thereby having all the characteristics of the above cylinder chassis assembly structure.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. This design uses electromagnetic adsorption to achieve the adsorption and release of the support disc, so that the installation and removal of the support disc can be completed through extremely simple and quick operations (only alignment and power on / off are required). During the process, since no human intervention and additional tools are required, the disc will not be damaged and the installation will not be tilted.

[0022] 2. This design adopts a dense wool felt structure, which can effectively prevent the powder from leaking from the supporting disc, and can also effectively prevent the cylinder from pulling and damaging the disc and cylinder wall.

[0023] 3. The device designed in this paper has a compact structure, reasonable layout and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0025] Figure 1 It is the overall structural diagram of the cylinder block and chassis assembly.

[0026] Figure 2 , 3 They are the top and bottom views of the chassis assembly explosion diagram. DETAILED DESCRIPTION

[0027] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0028] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0029] Embodiment 1

[0030] This embodiment discloses a cylinder chassis assembly structure, such as Figure 1 As shown, the chassis assembly 20 is located in the cylinder 10, and includes a support disk 20A and an electromagnet disk 20B. The support disk 20A has the property of being adsorbed by a magnet; the sizes of the support disk 20A and the electromagnet disk 20B are both adapted to the cylinder 10; the support disk 20A is arranged on the top of the electromagnet disk 20B, and the electromagnet disk 20B realizes the adsorption or release of the support disk 20A by energizing and discharging.

[0031] In order to achieve rapid positioning of the support disc 20A during installation, a positioning hole-positioning column structure is designed between the support disc 20A and the electromagnet disc 20B, that is, one is designed with a positioning hole and the other is designed with a matching positioning column. Figure 2 , 3 , a positioning hole 202 is provided at the bottom of the support disk 20A, and a corresponding positioning column 205 is provided at the top of the electromagnet disk 20B. When installing the support disk 20A, the positioning hole 202 is aligned with the positioning column 205, so that the support disk 20A and the electromagnet disk 20B can be aligned. The electromagnet disk 20B can adsorb and release the support disk 20A by the presence or absence of magnetic force. Take the electromagnet disk 20B as an example of a power-off holding type. When it is not powered on, it has magnetism, and the magnetism disappears after power is turned on. Then, after aligning with the support disk 20A, the electromagnet disk 20B adsorbs the support disk 20A. When the support disk 20A needs to be removed, it only needs to be powered on.

[0032] Due to the special requirements of printing powder, when using certain powder for printing, it is required that the part supporting the powder cannot have the property of being adsorbed by magnets. In this regard, the support plate 20A is designed as follows: the support plate 20A includes a bottom plate 201 and an adsorbing member 203. The bottom plate 201 does not have the property of being adsorbed by magnets. On the contrary, the adsorbing member 203 can be adsorbed by magnets. The adsorbing member 203 is embedded in the bottom plate 201. In one embodiment, Figure 3 As shown, the bottom of the chassis 201 is designed with a mounting groove 213 matching the adsorption member 203, and the adsorption member 203 is fixed in the mounting groove 213. The surface of the adsorption member 203 is slightly lower than the bottom surface of the chassis 201, and is designed to be annular around the positioning hole 202, such as a square ring.

[0033] Embodiment 2

[0034] This embodiment discloses the structure of the electromagnet disk 20B. Figure 2 , 3 As shown, the electromagnet disk 20B includes a positioning disk 204, a heat insulation disk 208 and a connection disk 211 connected in sequence from top to bottom. Corresponding to the case where a positioning hole-positioning column structure is designed, a positioning hole or a positioning column matching the supporting disk 20A is designed on the top of the positioning disk 204. Figure 2 , 3 As shown, a positioning hole 202 is designed in the middle of the bottom of the support plate 20A, and a positioning column 205 is designed at a corresponding position on the top of the positioning plate 204.

[0035] like Figure 2 As shown in or 3, at least one circle of wool felt 207 is provided on the side of the positioning disk 204. A number of electromagnets 206 are evenly distributed inside the positioning disk 204. During operation, the support disk 20A is adsorbed on the top of the positioning disk 204. The heat-insulating disk 208 is made of heat-insulating material, and a wire groove 209 is provided inside the heat-insulating disk 208. The wire groove 209 is used for routing the wiring harness of the electromagnet 206. Matching wire harness holes 210 are designed on the heat-insulating disk 208 and the connecting disk 211 to facilitate the passage of the wiring harness of the electromagnet 206. At least one sealing ring 212 is provided on the side of the connecting disk 211 to achieve an airtight effect. In one embodiment, as Figure 3 As shown, the positioning plate 204 is fixed to the connecting plate 211 by a number of evenly distributed screws, the heat insulating plate 208 is clamped between the positioning plate 204 and the connecting plate 211, and the heat insulating plate 208 is provided with corresponding screw through holes.

[0036] The wool felt 207 in the above design is of great significance. The powder material used in the SLM type 3D printer is usually of high hardness. In order to avoid the cylinder 10 from pulling the cylinder during the movement of the chassis assembly, the size of the chassis assembly 20 is slightly smaller than the single side of the cylinder wall, and the wool felt 207 is slightly lower than the end face of the positioning plate 204. After the printing starts, the powder will first fill the gap between the support plate 20A and the cylinder wall. At this time, due to the effect of the dense fine wool felt 207, the powder can be effectively prevented from continuing to move downward. The wool felt 207 has better compressibility than the sealing ring 212, and its structure contains a large number of dense gaps. Even if a small amount of powder falls into the gap between the wool felt 207 and the cylinder wall, it will not cause strain to the cylinder wall and each disc during the up and down movement due to excessive pressure. Further, the wool felt 207 is arranged in a matching groove on the positioning plate 204. In this way, when printing, the wool felt 207 is clamped on the side of the positioning plate 204 and is not easy to fall off.

[0037] The above-mentioned electromagnet 206 can be selected as a power-off holding type magnet (the same applies to the power-on holding type magnet). It is magnetic when the power is off and the magnetism disappears when the power is on, that is, the magnet is not energized when the printing work starts, and it is only energized when the support disk 20A needs to be taken out. When installing the support disk 20A, align the positioning column-positioning hole interface. At this time, due to the effect of the evenly distributed power-off holding type magnet, the support disk 20A is tightly adsorbed to achieve installation. When the printing is completed and the support disk 20A needs to be taken out, the power-off holding type magnet is energized to make its magnetic attraction disappear, and the support disk 20A can be easily and quickly taken out. The same applies to the selection of the power-on holding type magnet, which only needs to swap the power-on and power-off behaviors. In one embodiment, the electromagnet 206 is designed to be 8, evenly arranged around the center of the positioning disk 204 to form a ring, so that the support disk 20A is adsorbed by a planar magnetic force, so that it is evenly stressed and adsorbed smoothly.

[0038] Embodiment 3

[0039] This embodiment discloses a cylinder chassis assembly structure, such as Figure 1 As shown, the chassis assembly 20 is located in the cylinder 10, and includes a support disk 20A and an electromagnet disk 20B. The support disk 20A has the property of being adsorbed by a magnet; the sizes of the support disk 20A and the electromagnet disk 20B are both adapted to the cylinder 10; the support disk 20A is arranged on the top of the electromagnet disk 20B, and the electromagnet disk 20B realizes the adsorption or release of the support disk 20A by energizing and discharging.

[0040] A positioning hole-positioning column structure is designed between the support plate 20A and the electromagnet plate 20B. Figure 2 , 3 As shown, in one embodiment, a positioning hole 202 is designed in the middle of the bottom of the support plate 20A, and a positioning column 205 is designed in the middle of the top of the electromagnet plate 20B. The positioning hole 202 and the positioning column 205 are preferably both cylindrical.

[0041] like Figure 2 , 3As shown, the electromagnet disk 20B includes, from top to bottom, a positioning disk 204, a heat insulation disk 208, and a connecting disk 211 which are connected in sequence. A positioning hole 202 is designed in the middle of the bottom of the supporting disk 20A, and a positioning column 205 is designed at a corresponding position on the top of the positioning disk 204. A circle of wool felt 207 is arranged on the side of the positioning disk 204. A number of electromagnets 206 are evenly distributed inside the positioning disk 204. The heat insulation disk 208 is made of heat insulation material, and a wire passing groove 209 is arranged in the heat insulation disk 208. The wire passing groove 209 is used for routing the wiring harness of the electromagnet 206. Matching wire harness holes 210 are designed on the heat insulation disk 208 and the connecting disk 211 to facilitate the passage of the wiring harness of the electromagnet 206. A sealing ring 212 is arranged on the side of the connecting disk 211 to achieve an airtight effect. In one embodiment, as Figure 3 As shown, the positioning plate 204 is fixed to the connecting plate 211 by a plurality of evenly distributed screws 215 , the heat insulating plate 208 is clamped between the positioning plate 204 and the connecting plate 211 , and the heat insulating plate 208 is provided with corresponding screw through holes.

[0042] Embodiment 4

[0043] This embodiment discloses a cylinder chassis assembly structure, such as Figure 1 As shown, the chassis assembly 20 is located in the cylinder 10, and includes a support disc 20A and an electromagnet disc 20B. The sizes of the support disc 20A and the electromagnet disc 20B are both adapted to the cylinder 10; the support disc 20A is arranged on the top of the electromagnet disc 20B.

[0044] like Figure 3 As shown, the support plate 20A includes a chassis 201 and an adsorption component 203. The chassis 201 does not have the property of being adsorbed by a magnet. On the contrary, the adsorption component 203 can be adsorbed by a magnet. A mounting groove 213 is designed at the bottom of the chassis 201, and the adsorption component 203 is fixed in the mounting groove 213. A positioning hole 202 is designed in the middle of the bottom of the chassis 201.

[0045] The electromagnet disk 20B includes a positioning disk 204, a heat insulation disk 208 and a connecting disk 211 which are connected in sequence from top to bottom. Figure 2 , 3 As shown, a positioning column 205 is designed in the middle of the top of the positioning disk 204. A circle of wool felt 207 is set on the side of the positioning disk 204. A number of electromagnets 206 are evenly distributed inside the positioning disk 204. The heat insulation disk 208 is made of heat insulation material, and a wire groove 209 is set in the heat insulation disk 208. The wire groove 209 is used for wiring the wire harness of the electromagnet 206. Matching wire harness holes 210 are designed on the heat insulation disk 208 and the connecting disk 211 to facilitate the passage of the wire harness of the electromagnet 206. A sealing ring 212 is set on the side of the connecting disk 211 to achieve an airtight effect. In one embodiment, as Figure 3As shown, the positioning plate 204 is fixed to the connecting plate 211 by a plurality of evenly distributed screws 215 , the heat insulating plate 208 is clamped between the positioning plate 204 and the connecting plate 211 , and the heat insulating plate 208 is provided with corresponding screw through holes.

[0046] The electromagnet 206 in this embodiment is a power-off holding type magnet, which is magnetic when the power is off and disappears when the power is on. When installing the chassis 201, align the positioning holes of the chassis 201 with the positioning posts of the positioning plate 204. At this time, due to the uniform power-off holding type magnets, the support disk 20A is tightly adsorbed to achieve installation. When the printing is finished and the support disk 20A needs to be taken out, the power-off holding type magnet is energized to make its magnetic attraction disappear, and the support disk 20A can be easily and quickly taken out. The same is true for the selection of the power-on holding type magnet, which only needs to switch the power-on and power-off behaviors.

[0047] Embodiment 5

[0048] This embodiment discloses a cylinder chassis assembly structure, such as Figure 1 As shown, the chassis assembly 20 is located in the cylinder 10, and includes a support disc 20A and an electromagnet disc 20B. The sizes of the support disc 20A and the electromagnet disc 20B are both adapted to the cylinder 10; the support disc 20A is arranged on the top of the electromagnet disc 20B.

[0049] like Figure 3 As shown, the support plate 20A includes a chassis 201 and an adsorption component 203. The chassis 201 does not have the property of being adsorbed by a magnet. On the contrary, the adsorption component 203 can be adsorbed by a magnet. A mounting groove 213 is designed at the bottom of the chassis 201. The adsorption component 203 is fixed in the mounting groove 213 by a bolt 214. A positioning hole 202 is designed in the middle of the bottom of the chassis 201.

[0050] like Figure 2 , 3As shown, the electromagnet disk 20B includes a positioning disk 204, a heat insulation disk 208 and a connecting disk 211 connected in sequence from top to bottom. A positioning column 205 is designed in the middle of the top of the positioning disk 204. A circle of wool felt 207 is arranged on the side of the positioning disk 204. A number of electromagnets 206 are evenly distributed inside the positioning disk 204. The heat insulation disk 208 is made of heat insulation material, and a countersunk hole 217 corresponding to each electromagnet 206 is arranged on the heat insulation disk 208. The bottom of each electromagnet 206 is fixed in the corresponding countersunk hole 217 by a bolt 216. A wire groove 209 is arranged in the heat insulation disk 208. The wire groove 209 is used for wiring harness of the electromagnet 206, and each countersunk hole 217 is connected to the wire groove 209. Matching long waist-shaped harness through holes 210 are designed on the heat insulation disk 208 and the connecting disk 211 to facilitate the wiring harness of the electromagnet 206. A sealing ring 212 is provided on the side of the coupling plate 211 to achieve an airtight effect. Figure 3 As shown, the positioning plate 204 is fixed to the connecting plate 211 by a plurality of evenly distributed screws 215 , the heat insulating plate 208 is clamped between the positioning plate 204 and the connecting plate 211 , and the heat insulating plate 208 is provided with corresponding screw through holes.

[0051] The electromagnet 206 in this embodiment is a power-off holding type magnet, which is magnetic when the power is off and disappears when the power is on. When installing the chassis 201, align the positioning holes of the chassis 201 with the positioning posts of the positioning plate 204. At this time, due to the uniform power-off holding type magnets, the support plate 20A is tightly adsorbed to achieve installation. When printing is finished and the support plate 20A needs to be taken out, the power-off holding type magnet is energized to make its magnetic attraction disappear, so that the support plate 20A can be easily and quickly taken out.

[0052] Embodiment 6

[0053] This embodiment discloses a cylinder device, see attached Figure 1 The cylinder device includes the chassis assembly structure in the above embodiment.

[0054] Embodiment 7

[0055] This embodiment discloses a cylinder device, such as Figure 1 As shown, the cylinder device comprises a cylinder barrel and the chassis assembly structure in the above embodiment. The chassis assembly structure is arranged in the cylinder barrel and matches the size of the cylinder barrel.

[0056] Embodiment 8

[0057] This example discloses an SLM type 3D printing device, in which a cylinder device of a forming cylinder of the 3D printing device adopts the cylinder device in the above embodiment.

[0058] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A cylinder chassis assembly structure, applied to an SLM type 3D printing device, wherein the chassis assembly (20) is arranged in a cylinder (10), characterized in that: The chassis assembly (20) comprises a support disc (20A) and an electromagnet disc (20B), wherein the support disc (20A) has the property of being adsorbed by a magnet; the sizes of the support disc (20A) and the electromagnet disc (20B) are both adapted to the cylinder (10); the support disc (20A) is arranged on the top of the electromagnet disc (20B), and the electromagnet disc (20B) achieves adsorption or release of the support disc (20A) by energizing and discharging; the support disc (20A) comprises a chassis (201) and an adsorption member (203), wherein the chassis (201) does not have the property of being adsorbed by a magnet, and the adsorption member (203) can be adsorbed by a magnet; the bottom of the chassis (201) is designed with a mounting groove (213) matching the adsorption member (203), and the adsorption member (203) is fixed in the mounting groove (213); The electromagnet disk (20B) comprises, from top to bottom, a positioning disk (204), a heat insulation disk (208) and a connecting disk (211) which are connected in sequence. A positioning hole-positioning column structure is designed between the positioning disk (204) and the supporting disk (20A). A positioning hole is designed in the middle of the bottom of the supporting disk, and a positioning column is designed at a corresponding position on the top of the positioning disk. The side of the positioning disk (204) is provided with at least one circle of wool felt (207). A plurality of electromagnets (206) are evenly distributed inside the positioning disk (204), and the electromagnets (206) are power-off holding magnets. The heat insulation disk (208) is made of heat insulation material, and a wire passing groove (209) is provided inside the heat insulation disk (208). Matching wire harness passing holes (210) are designed on the heat insulation disk (208) and the connecting disk (211). At least one sealing ring (212) is provided on the side of the connecting disk (211). The heat insulation plate (208) is provided with a countersunk hole (217) corresponding to each electromagnet (206), the bottom of each electromagnet (206) is fixed in the corresponding countersunk hole (217), and each countersunk hole (217) is connected to the wire groove (209).

2. A cylinder device using the cylinder chassis assembly structure as claimed in claim 1.

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