CN108437456B - Arrangement device for fiber orientation in selective laser sintering powder laying and implementation method - Google Patents
Arrangement device for fiber orientation in selective laser sintering powder laying and implementation method Download PDFInfo
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- CN108437456B CN108437456B CN201810412199.7A CN201810412199A CN108437456B CN 108437456 B CN108437456 B CN 108437456B CN 201810412199 A CN201810412199 A CN 201810412199A CN 108437456 B CN108437456 B CN 108437456B
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- powder
- guide groove
- orientation
- orientation support
- funnel device
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- 239000000843 powder Substances 0.000 title claims abstract description 62
- 239000000835 fiber Substances 0.000 title claims abstract description 44
- 238000000110 selective laser sintering Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000005245 sintering Methods 0.000 claims description 6
- 238000000149 argon plasma sintering Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
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
-
- 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
- B29C64/188—Processes of additive manufacturing involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control
-
- 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
-
- 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
- B33Y10/00—Processes of additive manufacturing
-
- 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)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses an arrangement device for fiber orientation in selective laser sintering powder paving and an implementation method, and is characterized by comprising a powder paving roller, a funnel device and an orientation support; the powder spreading roller and the funnel device are respectively arranged on two sides of the workbench, a guide groove is formed in the bottom of the funnel device, and the orientation support is installed in the guide groove in the bottom of the funnel device. The implementation method comprises the following steps: the powder spreading roller is used for spreading a layer of powder on a working plane, then regularly distributed fibers are spread on the spread powder layer through the combined action of the hopper device and the orientation support, after the powder is sintered for one layer, the powder is spread again, then the angle between the cross rod and the longitudinal rod of the orientation support is changed, the fibers are spread again, and the process is continuously repeated. Compared with the prior art in which disordered fibers are mixed in sintered powder, the invention has the advantages that the structure is simple, the fibers can be effectively controlled to be arranged in the sample sintered layer according to the design direction, and the problem of anisotropy of the sintered sample of the fiber composite powder material at present is effectively solved.
Description
Technical Field
The invention belongs to the field of selective laser sintering, and particularly relates to an arrangement device for fiber orientation in selective laser sintering powder laying and an implementation method.
Technical Field
Selective Laser Sintering (SLS) is a rapid prototyping technology widely used at present, and the principle of the prototyping process is as follows: firstly, establishing a computer three-dimensional model of a target part, then slicing and dividing the three-dimensional model by using layering software, and controlling a laser beam to scan and sinter a preheated hot-fusible powder material layer by layer according to slicing level data information by a computer until the scanning and forming of a final cross-section layer are finished. The technology has the characteristics of simple manufacturing process, high flexibility, wide material selection range, high utilization rate, low cost, high forming speed and the like, and is receiving more and more extensive attention.
At present, SLS technology is selected the material comparatively extensively, includes: polymer materials, metals, ceramic powders, coated sand, and the like. Taking the most widely used nylon powder material as an example, after laser sintering, the formed part has low strength mainly due to loose texture and low density. In order to improve the strength of the molded article, researchers have added reinforcements such as linear fibers to the powder to increase the strength of the molded article. However, the prior art and the method can not effectively control the orientation arrangement of the fiber material in the powder, and further show that the mechanical property of the product is isotropic, thereby limiting the further application of the fiber reinforced material in selective laser sintering.
Disclosure of Invention
In order to solve the problems, the invention provides an arrangement device for fiber orientation in selective laser sintering powder laying and an implementation method.
The technical scheme adopted by the invention is an arrangement device for fiber orientation in selective laser sintering powder paving, which is characterized by comprising a powder paving roller, a funnel device and an orientation support; the powder spreading roller and the funnel device are respectively arranged on two sides of the workbench, and the orientation bracket is arranged on a guide groove of the funnel device;
in the arrangement device for fiber orientation in selective laser sintering powder paving, the bottom of the funnel device (7) is provided with a guide groove (72), the top of the guide groove (72) is provided with an opening-closing plate (71), two sides of the guide groove (72) are both provided with long holes, and the orientation support (9) passes through the long holes and is installed on the side wall of the guide groove (72);
the opening plate (71) is provided with a plurality of rectangular holes;
the rectangular holes are controllable in closing, the length of each rectangular hole is larger than the maximum length of the fiber, and the width of each rectangular hole is larger than the maximum diameter of the fiber;
the orientation support (9) is composed of a plurality of cross rods and two longitudinal rods, and the cross rods are connected with the longitudinal rods through revolute pairs to form a parallelogram mechanism; when the fiber orientation support works, the minimum distance between two adjacent cross rods is greater than the maximum diameter of the fiber, the maximum distance is less than the minimum length of the fiber, and the angle of the cross rods in the orientation support can be changed within the range of-45 degrees to 45 degrees;
the number of the cross bars is determined according to the length of the guide groove (72), and the guide groove specifically comprises a driving cross bar (92) and a plurality of driven cross bars (94), wherein one end of the driving cross bar (92) is connected with the worm gear mechanism (10); the longitudinal rod comprises a fixed longitudinal rod (93) and a movable longitudinal rod (91), the fixed longitudinal rod (93) is fixed on the funnel device (7), and the movable longitudinal rod (91) is always kept outside the guide groove (72);
a vibrator (8) is arranged on the outer wall of the guide groove (72);
the vibrator (8) and the worm gear mechanism (10) are respectively arranged on two sides of the outer part of the guide groove;
the worm and gear mechanism (10) comprises a worm wheel (101), a worm (102) and a worm wheel shaft (103), the worm wheel (101) is connected with the worm wheel shaft (103) through a spline, the worm wheel shaft (103) is fixedly connected with one end of the driving transverse rod (92), and the worm wheel shaft (103) is connected with one end of the fixed longitudinal rod (93) through a cylindrical pair.
An implementation method for fiber orientation in selective laser sintering powder laying comprises the following specific steps:
(a) powder materials (4) are preset in a powder feeding cylinder (5), and fibers (12) are preset in a funnel device (7);
(b) a powder layer is laid on a working plane (13) by the powder laying roller (3), then the orientation support (9) is adjusted to a required angle, the vibrator (8) is started, fibers parallel to the direction of the cross bar of the orientation support (9) are laid on the laid powder layer through the combined action of the funnel device (7) and the orientation support (9), and laser sintering is carried out;
(c) paving powder again, driving a worm and gear mechanism (10) at one side of the funnel device (7) through a motor (11) to drive a driving transverse rod (92) of the orientation support (9) to rotate, changing an angle between a transverse rod and a longitudinal rod in the orientation support (9), paving fibers in the other direction on the powder layer, and realizing that the fibers on the sintered powder layer are orderly arranged in different directions to carry out next layer sintering;
(d) and (c) continuously repeating the step (c) until all the sintering layers are sintered, and finally obtaining a sintered sample.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 2;
FIG. 5 is a bottom view of the device of the present invention (with the orientation support hidden);
FIG. 6 is a schematic view of an orientation support structure;
FIG. 7 is a partial enlarged view of FIG. 6 at B;
in the figure: 1-laser device, 2-laser beam, 3-powder laying roller, 4-powder material, 5-powder supply cylinder, 6-working cylinder, 7-funnel device, 71-plywood, 72-guide groove, 8-vibrator, 9-orientation support, 91-movable vertical rod, 92-driving transverse rod, 93-fixed vertical rod, 94-driven transverse rod, 10-worm gear mechanism, 101-worm gear, 102-worm gear, 103-worm gear shaft, 11-motor, 12-fiber, and 13-working plane.
Detailed Description
Referring to fig. 1, the arrangement device for fiber orientation in selective laser sintering powder laying disclosed by the invention mainly comprises a powder laying roller 3, a funnel device 7, a vibrator 8, an orientation bracket 9, a worm and gear mechanism 10 and a motor 11.
Referring to fig. 1 to 7, the implementation method for fiber orientation in selective laser sintering powder laying of the present invention specifically includes the following steps:
(1) the powder material 4 is preset in the powder feeding cylinder 5, the working cylinder 6 descends for a certain distance, the powder feeding cylinder 5 ascends for a certain distance, and the powder paving roller 3 paves a layer of the powder material 4 on the working plane 13;
(2) a cut-off plate 71 is arranged at the top of a guide groove 72 of the funnel device 7, a rectangular hole arranged on the cut-off plate 71 is controllable to close, and a vibrator 8 is arranged outside the guide groove 72; before work, the rectangular hole in the opening plate 71 is closed, fibers 12 are filled into the funnel device 7, during work, the motor 11 drives the worm gear mechanism 10 to drive the orientation support 9 to move to a required angle, then the rectangular hole in the opening plate 71 is opened, the vibrator 8 is started, at the moment, the fibers 12 can fall onto the working plane 13 after being oriented by the orientation support 9 through the rectangular hole in the opening plate 71, the fibers blocked on the orientation support 9 can be vibrated onto the working plane 13 through the vibration of the vibrator 8, the funnel device 7 moves back and forth on the pre-laid powder layer, and the fiber layer parallel to the direction of the cross rod in the orientation support 9 is laid on the powder layer. Then, carrying out first-layer scanning sintering on the powder layer and the fiber layer on the working plane 13 by using a laser beam 2 emitted by a laser device 1;
(3) the longitudinal rods and the transverse rods of the orientation support 9 are connected through revolute pairs, the fixed longitudinal rod 93 of the orientation support 9 is fixedly connected with the funnel device 7, one end of the driving transverse rod 92 is fixedly connected with the worm gear shaft 103 of the worm gear mechanism 10, one end of the fixed longitudinal rod 93 is connected with the worm gear shaft 103 of the worm gear mechanism 10 through a cylindrical pair, and the driving transverse rod 92 of the orientation support 9 can be driven to rotate when the worm gear shaft 103 rotates, so that other transverse rods are driven to rotate, and the angle between the transverse rods and the longitudinal rods of the orientation support 9 is changed;
(4) a worm wheel 101 of the worm and gear mechanism 10 is connected with a worm wheel shaft 103 through a spline pair, a worm 102 is connected with a main shaft of a motor 11, a powder feeding cylinder 5 is lifted for a certain distance, a forming cylinder 6 is lowered for a certain distance, a layer of powder is laid on a working plane 13 again by the powder laying roller 3, then the motor 11 drives the worm and gear mechanism 10 to drive a driving cross rod 92 of the orientation support 9 to rotate for a certain angle, further the angles of all cross rods in the orientation support 9 are changed, then fibers parallel to the cross rods in the direction are laid again, and the fibers on a sintered powder layer are orderly arranged in different directions to be sintered at the next layer;
(5) and (5) continuously repeating the step (4) until all the sintering layers are sintered, and finally obtaining a sintered sample.
Claims (3)
1. An arrangement device for fiber orientation in selective laser sintering powder paving is characterized by comprising a powder paving roller (3), a funnel device (7) and an orientation support (9); the powder spreading roller (3) and the funnel device (7) are respectively arranged at two sides of the workbench, and the orientation bracket (9) is arranged on the funnel device (7);
a guide groove (72) is formed in the bottom of the funnel device (7), a split plate (71) is arranged on the top of the guide groove (72), long holes are formed in two sides of the guide groove (72), and the orientation support (9) penetrates through the long holes and is installed on the side wall of the guide groove (72);
the opening plate (71) is provided with a plurality of rectangular holes;
the rectangular holes are controllable in closing, the length of each rectangular hole is larger than the maximum length of the fiber, and the width of each rectangular hole is larger than the maximum diameter of the fiber;
the orientation support (9) is composed of a plurality of cross rods and two longitudinal rods, and the cross rods are connected with the longitudinal rods through revolute pairs to form a parallelogram mechanism; when the device works, the minimum distance between two adjacent cross rods is greater than the maximum diameter of the fiber, and the maximum distance is less than the minimum length of the fiber;
the number of the cross bars is determined according to the length of the guide groove (72), and the guide groove specifically comprises a driving cross bar (92) and a plurality of driven cross bars (94), wherein one end of the driving cross bar (92) is connected with the worm gear mechanism (10); the longitudinal rod comprises a fixed longitudinal rod (93) and a movable longitudinal rod (91), the fixed longitudinal rod (93) is fixed on the funnel device (7), and the movable longitudinal rod (91) is always kept outside the guide groove (72);
a vibrator (8) is arranged on the outer wall of the guide groove (72);
the vibrator (8) and the worm gear mechanism (10) are respectively arranged on two sides of the outer part of the guide groove;
the worm and gear mechanism (10) comprises a worm wheel (101), a worm (102) and a worm wheel shaft (103), the worm wheel (101) is connected with the worm wheel shaft (103) through a spline, the worm wheel shaft (103) is fixedly connected with one end of the driving transverse rod (92), and the worm wheel shaft (103) is connected with one end of the fixed longitudinal rod (93) through a cylindrical pair.
2. An implementation method for fiber orientation in selective laser sintering powder laying comprises the following specific steps:
(a) powder materials (4) are preset in a powder feeding cylinder (5), and fibers (12) are preset in a funnel device (7);
(b) a powder layer is laid on a working plane (13) by the powder laying roller (3), then the orientation support (9) is adjusted to a required angle, the vibrator (8) is started, fibers parallel to the direction of the cross bar of the orientation support (9) are laid on the laid powder layer through the combined action of the funnel device (7) and the orientation support (9), and laser sintering is carried out;
(c) paving powder again, driving a worm and gear mechanism (10) at one side of the funnel device (7) through a motor (11) to drive a driving transverse rod (92) of the orientation support (9) to rotate, changing an angle between a transverse rod and a longitudinal rod in the orientation support (9), paving fibers in the other direction on the powder layer, and realizing that the fibers on the sintered powder layer are orderly arranged in different directions to carry out next layer sintering;
(d) and (c) continuously repeating the step (c) until all the sintering layers are sintered, and finally obtaining a sintered sample.
3. The method of claim 2, wherein the angle of the cross bar in the orientation support can vary from-45 ° to 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810412199.7A CN108437456B (en) | 2018-05-03 | 2018-05-03 | Arrangement device for fiber orientation in selective laser sintering powder laying and implementation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810412199.7A CN108437456B (en) | 2018-05-03 | 2018-05-03 | Arrangement device for fiber orientation in selective laser sintering powder laying and implementation method |
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| Publication Number | Publication Date |
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| CN108437456A CN108437456A (en) | 2018-08-24 |
| CN108437456B true CN108437456B (en) | 2020-02-28 |
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| CN201810412199.7A Expired - Fee Related CN108437456B (en) | 2018-05-03 | 2018-05-03 | Arrangement device for fiber orientation in selective laser sintering powder laying and implementation method |
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| CN109605741B (en) * | 2018-11-21 | 2020-09-08 | 湘潭大学 | Selective laser sintering device and method for carrying out carbon fiber directional arrangement by using gasification die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7794647B1 (en) * | 2006-03-23 | 2010-09-14 | Carl Deckard | Method of selective laser sintering with improved materials |
| CN203004330U (en) * | 2012-12-13 | 2013-06-19 | 余金文 | Fiber implanting device |
| CN203752535U (en) * | 2014-03-17 | 2014-08-06 | 余金文 | Fiber implantation device for selective laser sintering (SLS) |
| JP2017165035A (en) * | 2016-03-17 | 2017-09-21 | 富士ゼロックス株式会社 | Lamination shaping apparatus |
| US20180065317A1 (en) * | 2016-09-06 | 2018-03-08 | Cc3D Llc | Additive manufacturing system having in-situ fiber splicing |
| CN107756786B (en) * | 2017-10-24 | 2019-09-20 | 湘潭大学 | The device and method of ultrasound control fiber architecture in a kind of precinct laser sintering |
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