CN110549602B - Laser sintering 3D printer - Google Patents
Laser sintering 3D printer Download PDFInfo
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- CN110549602B CN110549602B CN201810562431.5A CN201810562431A CN110549602B CN 110549602 B CN110549602 B CN 110549602B CN 201810562431 A CN201810562431 A CN 201810562431A CN 110549602 B CN110549602 B CN 110549602B
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- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 147
- 230000007480 spreading Effects 0.000 claims abstract description 49
- 238000003892 spreading Methods 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000007790 scraping Methods 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000007639 printing Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 5
- 238000011002 quantification Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/218—Rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/245—Platforms or substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention provides a laser sintering 3D printer which comprises a telescopic forming cylinder and a powder supplying and spreading mechanism, wherein the telescopic forming cylinder can solve the problems of sealing and cleaning, the telescopic forming cylinder is connected with an upper cylinder body and a lower cylinder body through a telescopic structure, the whole device is in a closed state, the quality of a formed part can be improved while the sealing problem is solved, and in addition, the cleaning problem can be well solved due to the seamless connection between a workbench and the forming cylinder. Including supplying the powder and spreading the powder device, adopt the ration to spread the quantitative supply that powder mechanism realized the powder, prevent that unnecessary powder from piling up, equipment is succinct, and is with low costs.
Description
Technical Field
The invention relates to the field of additive manufacturing, in particular to a laser sintering 3D printer. .
Background
With the development of 3D printing technology, the research on laser sintering technology is more and more intensive. The process of laser sintering processing parts is that a powder supply and spreading device spreads a certain amount of powder on a workbench, then a strickler is used for strickling the powder, then a laser head is used for sintering the powder on the current layer, after the processing is finished, the powder supply and spreading device spreads the powder, the strickling is continued, and the process is repeated to obtain the required parts.
In 3D printing technology, especially in laser sintering technology, the requirement for the sealing condition of the forming chamber is high, and most of the current technologies focus on studying how to achieve the sealing state of the forming chamber by using external conditions, such as arranging a vacuum pump outside the forming chamber and achieving sealing by using vacuum; or how to design a better sealing part or material to realize the sealing between the workbench and the forming cylinder wall, but the prior art can not achieve a more ideal sealing effect, and the sealing effect is worse and worse due to abrasion, so that a series of maintenance problems are caused due to the need of frequently replacing a sealing element, and more importantly, the quality of the forming part can not meet the requirement; in addition, these current techniques do not solve the cleaning problem, and cleaning of the forming cylinder is important when multiple powders are to be printed in the same forming cylinder.
The existing powder spreading device has the advantages that quantitative powder spreading and non-quantitative powder spreading are realized, materials can be saved in the printing process by means of quantitative powder spreading, and manpower and material resources are saved in the process of powder recovery after printing is completed. The existing quantitative powder paving has mechanical quantification and electric quantification, and the quantitative mode of the mechanical quantification is only suitable for a 3D printer made of one material, but is not suitable for paving powder made of different materials and different quantities; the electric quantitative determination can be suitable for different materials and quantitative determination of different quantities, but the structure is complex and the requirement on equipment is high.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a laser sintering 3D printer.
The invention provides a telescopic forming cylinder capable of solving the sealing problem, and the cleaning problem can be well solved due to the seamless connection between a workbench and the forming cylinder. Meanwhile, the invention also provides a quantitative powder laying device, which realizes quantitative supply of powder, prevents redundant printing powder from being accumulated, and has simple equipment and low cost.
The specific technical scheme of the invention is as follows:
the forming device comprises a forming cylinder, a workbench ball screw pair, a powder spreading device and a rack for mounting the forming cylinder, wherein the forming cylinder is arranged in the rack and comprises an upper cylinder body, a lower cylinder body and a telescopic structure, the upper cylinder body is fixedly connected to the upper part of the rack, the lower cylinder body is movably connected with the bottom of the rack through a vertical ball screw pair, the upper cylinder body is connected with the lower cylinder body through the telescopic structure, and the upper cylinder body and the lower cylinder body form a closed cavity through the telescopic structure. The working table is positioned in the lower cylinder body and is fixedly connected with the lower cylinder body.
The two opposite sides of the bottom of the rack are provided with stabilizing guide rails, the outer wall of the lower cylinder body and the corresponding positions of the stabilizing guide rails are fixedly provided with sliding blocks, the sliding blocks and the stabilizing guide rails are connected in a sliding mode under the matching of the sliding blocks and the stabilizing guide rails, and the lower cylinder body moves up and down along the stabilizing guide rails.
Spread the powder device and include that horizontal ball is vice, spliced pole, confession powder groove, spread the powder roller and scrape the board, the spliced pole is four, the inside top of last cylinder body of the two liang of fixed mounting that correspond in top of spliced pole, the bottom fixed mounting of spliced pole has the screw bearing supporting seat, install the lead screw bearing on the screw bearing supporting seat. The horizontal ball screw pair is two pairs which are arranged in parallel on the horizontal plane. And the ball screw of the horizontal ball screw pair is arranged in the ball screw bearing. One end of the ball screw is connected with a direct current speed reduction motor through a coupler, the direct current speed reduction motor is fixedly connected with a screw bearing supporting seat through a motor mounting seat, and a screw nut is mounted on the ball screw.
The bottom of the powder supply groove is arc-shaped, the arc top is upward, and the arc-shaped bottom of the powder supply groove is provided with a powder leakage opening along the axial direction of the powder supply groove; the two ends of the powder supply groove are fixedly connected with supporting plates, and one end, far away from the powder supply groove, of each supporting plate is fixedly connected with a screw nut on the ball screw pair.
Spread the powder roller setting and be in supply the bottom in powder groove, the both ends of spreading the powder roller are provided with the roll pivot, the fixed pivot support piece that is provided with in bottom of backup pad, the roll pivot is rotated through pivot support piece and backup pad and is connected. The diameter of the powder paving roller is the same as that of the arc-shaped bottom of the powder supply groove, and under the action of the rotating shaft supporting piece, the powder paving roller is matched with the bottom of the powder supply groove and is in sealing connection with the powder supply groove. And the powder paving roller is provided with a powder paving channel corresponding to the powder leakage port along the axial direction. The powder paving machine is characterized in that a powder paving motor is installed on the upper portion of the supporting plate, a rolling rotating shaft at one end of the powder paving roller is connected with the powder paving motor through a belt wheel assembly, and the rolling rotating shaft drives the powder paving roller to rotate under the driving of the powder paving motor.
The both sides of the backup pad bottom at confession powder groove both ends all install the dull and stereotyped draw-in groove of scraping, the notch that each side scraped the dull and stereotyped board card groove to right, install the dull and stereotyped of scraping in the dull and stereotyped draw-in groove of scraping, scrape the dull and stereotyped draw-in groove and scrape the both sides that the flat setting was spreading the powder roller.
In the forming cylinder, the length of the connecting column enables the scraping plate to be close to the distance of one layer of powder of the printing platform under the condition that the telescopic structure is not extended.
As an improvement, a sealing gasket is arranged between the arc-shaped bottom of the powder supply groove and the powder spreading roller.
In actual use: before the print job begins, extending structure does not extend, and the powder device of shop spreads the powder on print platform and scrapes, and the laser head is printed, accomplishes the one deck and prints the back, and ball drives down the cylinder body decline one deck, and extending structure is tensile, and the powder device of shop spreads the powder once more, and the laser head prints once more, repeats above-mentioned process, prints until accomplishing.
The invention has the beneficial effects that:
according to the 3D printer disclosed by the invention, the lifting of the original printing platform is replaced by the lifting of the whole cylinder body, the matching of the printing platform and the cylinder body is reduced, and meanwhile, the printing chamber is replaced by the whole cylinder body. The powder spreading and leveling device has a simple structure, and can realize quantitative powder supply and prevent redundant printing powder from being accumulated at the same time.
[ description of the drawings ]
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without any creative effort.
Fig. 1 is a cross-sectional view of a front view of the present invention.
Fig. 2 is a schematic view of the powder spreading device of the present invention.
Fig. 3 is a partial enlarged view of the present invention.
Fig. 4 is an enlarged view of a portion of the powder spreading device of the present invention.
Fig. 5 is an enlarged view of a portion of the powder spreading device of the present invention.
Fig. 6 is a vertical axial sectional view of the powder spreading device of the present invention.
The corresponding part names indicated by the numbers in the figures:
1. the powder spreading machine comprises a rack 2, a forming cylinder 2-1, an upper cylinder 2-2, a lower cylinder 2-3, a telescopic structure 3, a vertical ball screw pair 4, a stable guide rail 4-1, a sliding block 5, a workbench 6-1, a first connecting column 6-2, a second connecting column 7-1, a first ball screw 7-2, a second ball screw 8-1, a first screw bearing support seat 8-2, a second screw bearing support seat 8-3, a third screw bearing support seat 8-4, a fourth screw bearing support seat 9, a powder spreading device 9-1, a powder supply groove 9-11, a powder leakage port 9-2, a powder spreading roller 9-21, a powder spreading channel 9-3, a powder spreading motor 9-4a, A first support plate 9-4b, a second support plate 9-5, a rolling rotating shaft 9-5a, a first rolling rotating shaft 9-5b, a second rolling rotating shaft 9-6a, a first rotating shaft support member 9-6b, a second rotating shaft support member 9-7, a belt wheel assembly 9-8a, a first scraping plate 9-8b, a second scraping plate 9-9a, a first scraping plate clamping groove 9-9b, a second scraping plate clamping groove 9-9c, a third scraping plate clamping groove 9-9d, a fourth scraping plate clamping groove 10-1, a first direct current speed reducing motor 10-2, a second direct current speed reducing motor 11, a shaft coupler 12, a motor mounting seat 13-1, a first screw nut 13-2, a second screw nut 14-1, A first screw bearing 14-2, a second screw bearing 14-3, a third screw bearing 14-4 and a fourth screw bearing
[ detailed description ] embodiments
The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments of the present invention without creative efforts, are within the scope of the present invention.
In the description of the present invention, it is to be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly unless otherwise specifically indicated and limited. For example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two original parts can be directly connected, or connected through an intermediate medium, or internally communicated. The specific meanings of the above terms in the present invention can be understood in specific cases by those of ordinary skill in the art.
Example 1: refer to fig. 1 to 6
[A laser sintering 3D printer comprises a rack 1, a forming cylinder 2, a workbench 5 and a powder spreading device 9, wherein the forming cylinder 2 is installed in the rack 1, and the forming cylinder 2 comprises an upper cylinder body 2-1 and a lower cylinder body 2-2. The workbench (5) is positioned inside the lower cylinder body (2-2) and is fixedly connected with the lower cylinder body (2-2).
The upper cylinder body 2-1 is fixedly connected to the upper portion of the rack 1, the lower cylinder body 2-2 is movably connected with the bottom of the rack 1 through a vertical ball screw pair 3, and the lower cylinder body 2-2 is driven by the vertical ball screw pair 3 to move up and down in the rack 1. The upper cylinder body 2-1 is connected with the lower cylinder body 2-2 through a telescopic structure 2-3, and the upper cylinder body 2-1 and the lower cylinder body 2-2 form a closed cavity through the telescopic structure 2-3. A stable guide rail 4 is arranged on one side of the bottom of the rack, a sliding block 4-1 is fixedly arranged at the corresponding position of the lower cylinder body 2-2 and the stable guide rail 4, the sliding block 4-1 is in sliding connection with the stable guide rail 4, and the lower cylinder body 2-2 stably runs during lifting movement under the matching of the sliding block 4-1 and the stable guide rail 4.
The powder spreading device 9 comprises a horizontal ball screw pair, a connecting column, a powder supply groove 9-1, a powder spreading roller 9-2 and a scraping plate 9-8. The connecting columns are respectively a first connecting column 6-1, a second connecting column 6-2, a third connecting column and a fourth connecting column, and the top ends of the connecting columns are fixedly arranged at the top end of the inner part of the upper cylinder body 2-1 in a pairwise correspondence manner. The bottom end of the first connecting column 6-1 is fixedly provided with a first lead screw bearing supporting seat 8-1, the bottom end of the second connecting column 6-2 is fixedly provided with a second lead screw bearing supporting seat 8-2, the bottom end of the third connecting column is fixedly provided with a third lead screw bearing supporting seat 8-3, and the bottom end of the fourth connecting column is fixedly provided with a fourth lead screw bearing supporting seat 8-4. A first lead screw bearing 14-1 is arranged on the first lead screw bearing supporting seat 8-1, a second lead screw bearing 14-2 is arranged on the second lead screw bearing supporting seat 8-2, a third lead screw bearing 14-3 is arranged on the third lead screw bearing supporting seat 8-3, and a fourth lead screw bearing 14-4 is arranged on the fourth lead screw bearing supporting seat 8-4. One end of a first ball screw 7-1 of the first horizontal ball screw pair is arranged in a first ball screw bearing 14-1, and the other end of the first ball screw is arranged in the other opposite ball screw bearing 14-2; one end of a second ball screw 7-2 of the second horizontal ball screw pair is mounted in a fourth ball screw bearing 14-4, and the other end is mounted in the opposite other ball third screw bearing 14-3. One end of a first ball screw 7-1 is connected with a first direct current speed reducing motor 10-1 through a coupler 11-1, and the first direct current speed reducing motor 10-1 is fixedly connected with a screw bearing supporting seat 8-2 through a motor mounting seat 12-1; one end of a second ball screw 7-2 is connected with a second direct current speed reducing motor 10-2 through a coupler 11-2, the second direct current speed reducing motor 10-2 is fixedly connected with a screw bearing supporting seat 8-3 through a motor mounting seat 12-2, and two ball screw pairs are arranged at the bottom end of the connecting column in parallel. A first lead screw nut 13-1 is arranged on the first ball screw 7-1; and a second ball screw 7-2 is provided with a second screw nut 13-2. The powder spreading device 9 is arranged between the first lead screw nut 13-1 and the second lead screw nut 13-2, and the powder spreading device 9 can horizontally move on the printing platform along the first ball screw 7-1 and the second ball screw 7-2 under the driving of the first lead screw nut 13-1 and the second lead screw nut 13-2 which are parallel to each other.
The powder spreading device 9 comprises a powder supply groove 9-1, a powder spreading roller 9-2 and a scraping plate 9-8. The cross section of the powder supply groove 9-1 is inverted trapezoid, the bottom of the powder supply groove 9-1 is arc-shaped, and the arc top is upward. Two ends of the powder supply groove 9-1 are provided with a first supporting plate 9-4a and a second supporting plate 9-4b, one end of the first supporting plate 9-4a far away from the powder supply groove 9-1 is fixedly connected with the screw nut 13-1, and one end of the second supporting plate 9-4b far away from the powder supply groove 9-1 is fixedly connected with the second screw nut 13-2. The upper part of the second supporting plate 9-4b is provided with a powder laying motor 9-3, the bottom of the first supporting plate 9-4a is provided with a first rotating shaft supporting piece 9-6a, and the bottom of the second supporting plate 9-4b is provided with a rotating shaft supporting piece 9-5 b; a first scraping plate clamping groove 9-9a is arranged on one side of the bottom of the first supporting plate 9-4a, a second scraping plate clamping groove 9-9b is arranged on the other side of the bottom of the first supporting plate 9-4a, a third scraping plate clamping groove 9-9c is arranged on one side of the bottom of the second supporting plate 9-4b, and a fourth scraping plate clamping groove 9-9d is arranged on the other side of the bottom of the second supporting plate 9-4 b. The notches of the first and second screed clamping grooves 9-9a and 9-9b are aligned, the notches of the third and fourth screed clamping grooves 9-9c and 9-9d are aligned, one end of the first screed plate 9-8a is installed in the first screed plate clamping groove 9-9a, the other end is installed in the third screed plate clamping groove 9-9c, one end of the second screed plate 9-8b is installed in the second screed plate clamping groove 9-9b, and the other end is installed in the fourth screed plate clamping groove 9-9 d. The bottom of the powder supply groove 9-1 is provided with a rectangular powder leakage opening 9-11.
The first squeegee 9-8a is movable up and down in the first and third squeegee slots 9-9a and 9-9c to adjust the height of the first squeegee 9-8a, and the second squeegee 9-8b is movable up and down in the second and fourth squeegee slots 9-9b and 9-9d to adjust the height of the second squeegee 9-8 b.
One end of the powder spreading roller 9-2 is fixedly provided with a first rolling rotating shaft 9-5a, the other end is provided with a second rolling rotating shaft 9-5b, the first rolling rotating shaft 9-5a is arranged in a first rotating shaft supporting piece 9-6a and is rotationally connected with the first rotating shaft supporting piece 9-6a, and the second rolling rotating shaft 9-5b is arranged in a second rotating shaft supporting piece 9-6b and is rotationally connected with the second rotating shaft supporting piece 9-6 b. One end of the second rolling rotating shaft 9-5b, which extends out of the second shaft supporting piece 9-6b, is connected with the powder spreading motor 9-3 through the belt wheel assembly 9-7, and the powder spreading motor 9-3 drives the first rolling rotating shaft 9-5a and the second rolling rotating shaft 9-5b to rotate through the belt wheel assembly 9-7, so that the powder spreading roller 9-2 is driven to rotate. The powder spreading roller 9-2 is provided with a powder spreading channel 9-21, and the powder spreading channel 9-21 extends from the cylindrical surface at one side of the powder spreading roller 9-2 to the cylindrical surface at the other side. The diameter of the powder paving roller 9-2 is the same as that of the arc-shaped bottom of the powder supply groove 9-1, the powder paving roller 9-2 is hermetically connected with the arc-shaped bottom of the powder supply groove 9-1 under the action of the first rotating supporting piece 9-6a and the second rotating supporting piece 9-6b, and the powder paving roller 9-2 can rotate relative to the bottom of the powder supply groove 9-1.
In the process that the powder paving roller 9-2 rotates relative to the bottom of the powder supply groove 9-1, the powder paving channel 9-21 is directly opposite to the powder leakage opening 9-11, so that powder is paved from the powder leakage opening 9-11 through the powder paving channel 9-21, or a part of the powder paving channel 9-21 is opposite to the powder leakage opening 9-11, the size of the opening of the powder leakage opening 9-11 is changed, and the powder leakage amount of the powder leakage opening 9-11 in unit time is changed.
Example 2
The difference between this embodiment and embodiment 1 is only that a sealing gasket is installed between the arc-shaped bottom of the powder supply groove 9-1 and the powder spreading roller 9-2, and the other structures, connection modes and working modes are the same as those of embodiment 1.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. The present invention is not limited to the precise arrangements described above and illustrated in the drawings, and it is not intended that the specific embodiments of the present invention be limited to the specific details set forth herein. Various changes and modifications to the invention, which will be apparent to those skilled in the art, can be made without departing from the spirit of the invention, and are intended to be within the scope of the invention.
Claims (2)
1. The utility model provides a laser sintering 3D printer, includes shaping jar (2), vertical ball screw is vice (3), workstation (5) and shop's powder device (9), its characterized in that: the forming device is characterized by further comprising a rack (1) used for mounting the forming cylinder (2), wherein the forming cylinder (2) is arranged in the rack (1), the forming cylinder (2) comprises an upper cylinder body (2-1), a lower cylinder body (2-2) and a telescopic structure (2-3), and the workbench (5) is located inside the lower cylinder body (2-2) and is fixedly connected with the lower cylinder body (2-2);
the upper cylinder body (2-1) is fixedly connected to the upper part of the rack (1), the lower cylinder body (2-2) is movably connected with the bottom of the rack (1) through a vertical ball screw pair (3), the upper cylinder body (2-1) is connected with the lower cylinder body (2-2) through a telescopic structure (2-3), and the upper cylinder body (2-1) and the lower cylinder body (2-2) form a closed cavity through the telescopic structure (2-3); the two opposite sides of the bottom of the rack (1) are provided with stable guide rails (4), the outer wall of the lower cylinder body (2-2) and the positions corresponding to the stable guide rails (4) are fixedly provided with sliding blocks (4-1), and the sliding blocks (4-1) are connected with the stable guide rails (4) in a sliding manner;
the powder spreading device (9) comprises four horizontal ball screw pairs, connecting columns, powder supply grooves (9-1), powder spreading rollers (9-2) and scraping plates (9-8), the top ends of the connecting columns are fixedly mounted at the top ends of the inner parts of the upper cylinder bodies (2-1) in a pairwise corresponding mode, a screw bearing supporting seat (8) is fixedly mounted at the bottom end of each connecting column, and a screw bearing is mounted on each screw bearing supporting seat (8); the horizontal ball screw pair is two pairs, and the ball screws of the horizontal ball screw pair are arranged in the screw bearings; one end of the ball screw is connected with a direct current speed reducing motor through a coupler, and the direct current speed reducing motor is fixedly connected with a screw bearing supporting seat (8) through a motor mounting seat; a lead screw nut is arranged on the ball screw;
the bottom of the powder supply groove (9-1) is arc-shaped, the arc top is upward, and the arc-shaped bottom of the powder supply groove (9-1) is provided with a powder leakage opening (9-11) along the axial direction of the powder supply groove (9-1); a first supporting plate (9-4 a) and a second supporting plate (9-4b) are fixedly connected to both ends of the powder supply groove (9-1), and one end, far away from the powder supply groove (9-1), of the first supporting plate is fixedly connected with a screw nut on the ball screw pair;
the powder paving roller (9-2) is arranged at the bottom of the powder supply groove (9-1), and rolling rotating shafts are arranged at two ends of the powder paving roller (9-2); the bottom of the supporting plate (9-4) is fixedly provided with a rotating shaft supporting piece, and the rolling rotating shaft is rotatably connected with the supporting plate through the rotating shaft supporting piece; the diameter of the powder paving roller (9-2) is the same as that of the arc-shaped bottom of the powder supply groove (9-1), and under the action of the rotating shaft supporting piece, the bottom of the powder paving roller (9-2) is matched with that of the powder supply groove (9-1) and the two are in sealing connection; the powder spreading roller (9-2) is provided with a powder spreading channel (9-21) corresponding to the powder leakage port (9-11) along the axial direction; a powder spreading motor (9-3) is installed on the upper portion of the second supporting plate (9-4b), a rolling rotating shaft (9-5) at one end of the powder spreading roller (9-2) is connected with the powder spreading motor (9-3) through a belt wheel assembly (9-7), and the rolling rotating shaft (9-5) drives the powder spreading roller (9-2) to rotate under the driving of the powder spreading motor (9-3);
scraping plate clamping grooves are arranged on two sides of the bottoms of the supporting plates (9-4) at two ends of the powder supply groove (9-1), notches of the scraping plate clamping grooves on each side face to face, scraping plates are arranged in the scraping plate clamping grooves, and the scraping plate clamping grooves and the scraping plates are arranged on two sides of the powder spreading roller (9-2).
2. The laser sintering 3D printer of claim 1, wherein: a sealing gasket is arranged between the arc-shaped bottom of the powder supply groove (9-1) and the powder spreading roller (9-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562431.5A CN110549602B (en) | 2018-06-04 | 2018-06-04 | Laser sintering 3D printer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562431.5A CN110549602B (en) | 2018-06-04 | 2018-06-04 | Laser sintering 3D printer |
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| Publication Number | Publication Date |
|---|---|
| CN110549602A CN110549602A (en) | 2019-12-10 |
| CN110549602B true CN110549602B (en) | 2022-04-12 |
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| CN201810562431.5A Active CN110549602B (en) | 2018-06-04 | 2018-06-04 | Laser sintering 3D printer |
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| CN110549602A (en) | 2019-12-10 |
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