CN114260473A - Two-way powder paving system and method of SLM (Selective laser melting) equipment - Google Patents
Two-way powder paving system and method of SLM (Selective laser melting) equipment Download PDFInfo
- Publication number
- CN114260473A CN114260473A CN202010961413.1A CN202010961413A CN114260473A CN 114260473 A CN114260473 A CN 114260473A CN 202010961413 A CN202010961413 A CN 202010961413A CN 114260473 A CN114260473 A CN 114260473A
- Authority
- CN
- China
- Prior art keywords
- powder
- powder spreading
- guide rail
- scraper
- connecting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention provides a bidirectional powder laying system and method of SLM equipment, and belongs to the technical field of rapid prototyping. The bidirectional powder spreading system comprises a vertical cutter lifting device and a horizontal powder spreading system, wherein the vertical cutter lifting device is vertically arranged on the outer side of the horizontal powder spreading system and comprises a cutter lifting device mounting seat, a vertical moving mechanism and a powder spreading scraper; the powder spreading scraper can stride over the metal powder layer in the up-and-down moving process, and the metal powder is spread in two directions under the driving of the horizontal powder spreading system. The powder spreading time is greatly reduced, the forming speed and efficiency of the equipment are improved, and the printing efficiency of the SLM equipment is obviously improved; meanwhile, the problem that a powder layer in a forming area is damaged when a powder paving system scrapes back in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of rapid prototyping, and particularly relates to a bidirectional powder laying system and method of SLM equipment.
Background
Selective Laser Melting (SLM) equipment scans selected areas on a new powder laying layer by layer through fine laser focusing spots to form a surface profile, and then the powder laying layer by layer is stacked, molded and manufactured, so that metal functional parts with almost any shapes and complete metallurgical bonding can be directly obtained; the advantages are mainly shown in that:
(1) by adopting the layered manufacturing technology, the formed part is not influenced by geometric complexity, can be directly manufactured for any complex formed metal part, and is particularly convenient for manufacturing personalized complex metal products in small batch;
(2) the optical fiber laser with high power density is used, so that the beam mode is good, the laser spot is small, and the forming precision is high;
(3) the metal material with high melting point and difficult processing can be directly processed into the terminal metal product due to higher laser energy density;
(4) formed metal parts are solid bodies with metallurgy, with relative densities of almost 100%, and properties that exceed those of conventional castings.
The selective laser melting process uses metal powder and optical devices such as a laser, a galvanometer, a field lens and the like, scans and irradiates the metal powder under the control of a computer to melt the material, and realizes the molding by layer-by-layer accumulation of the material. The whole process device for selective laser melting consists of a powder cylinder and a forming cylinder, wherein during work, a powder cylinder piston (powder feeding piston) rises, powder is uniformly paved on a forming base station arranged on the forming cylinder piston (working piston) by a scraper, and a computer controls a two-dimensional scanning track of a laser beam according to a prototype slicing model and selectively sinters a solid powder material to form one layer of a part; after the powder is finished by one layer, the piston of the forming cylinder descends by one layer thickness, the powder laying system re-lays new powder on the forming base station, and controls the laser beam to scan and sinter the new layer; the steps are repeated in a circulating way, and are overlapped layer by layer until the three-dimensional part is molded; finally, the unsintered powder is recovered in a powder jar and the molded part is removed.
The printing efficiency of the SLM equipment is the accumulation of the layer-by-layer scanning speed and the powder laying time of each layer, and the layer-by-layer scanning speed is determined by the material property on the premise of ensuring the molding quality. Under the condition that the scanning speed is fixed, the printing efficiency is influenced by the optimization level of the powder spreading time, and the more the number of printing layers is, the larger the influence of the optimization of the powder spreading time on the printing efficiency is.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a bidirectional powder spreading system and method of SLM equipment, which are used for improving the printing efficiency of the SLM equipment.
The present invention achieves the above-described object by the following technical means.
A bidirectional powder paving system of SLM equipment comprises a horizontal powder paving system and a vertical cutter lifting device which is vertically arranged on the outer side of the horizontal powder paving system; the vertical cutter lifting device comprises a cutter lifting device mounting seat, a vertical moving mechanism and a powder spreading scraper, the cutter lifting device mounting seat is mounted on the outer side of the horizontal powder spreading system, the vertical moving mechanism is mounted on the cutter lifting device mounting seat, the vertical moving mechanism is fixed with the powder spreading scraper, and the powder spreading scraper moves up and down under the driving of the vertical moving mechanism.
In the technical scheme, the vertical moving mechanism is a micro linear motor, the micro linear motor is installed on the cutter lifting device installation seat, the micro linear motor is provided with a position feedback device, and the micro linear motor and the feedback device are in signal connection with the motor controller.
In the technical scheme, the output shaft of the miniature linear motor is connected with the top end of a guide rail motor connecting plate, the guide rail motor connecting plate is locked with a sliding block inside a guide rail, and the bottom end of the guide rail motor connecting plate is fixedly provided with a powder spreading scraper.
In the above technical solution, the length, width, and height of the micro linear motor are within a range of 40mm, 20mm, and 50 mm.
In the technical scheme, the stroke range of the micro linear motor is set within 10 mm.
In the technical scheme, the vertical moving mechanism is an air cylinder, a piston of the air cylinder is connected with the top end of a guide rail motor connecting plate, the guide rail motor connecting plate is locked with a sliding block in a guide rail, and a powder spreading scraper is fixed at the bottom end of the guide rail motor connecting plate; the power supply of the cylinder is realized by controlling the electromagnetic valve through the controller.
In the technical scheme, the vertical moving mechanism is an electromagnet, the electromagnet is connected with a guide rail motor connecting plate through a spring, the guide rail motor connecting plate is locked with a sliding block in the guide rail, and a powder spreading scraper is fixed at the bottom end of the guide rail motor connecting plate; the guide rail motor connecting plate is made of magnetic materials, and the electromagnet is controlled by a relay and a controller to be electrified or not.
In the technical scheme, the number of the guide rails is 1 or 2, and the guide rails are fixed on the side parts of the vertical moving mechanism.
A powder paving method of a bidirectional powder paving system of SLM equipment specifically comprises the following steps:
the powder supply system provides a proper amount of metal powder, the powder spreading scraper vertically moves downwards to a height position set during powder spreading of the system, the vertical cutter lifting device is driven by the horizontal powder spreading system to move horizontally, the powder spreading scraper spreads the powder to a forming area, and after one-time powder spreading is finished, the powder spreading scraper is positioned at one end of the redundant metal powder layer;
the powder spreading scraper vertically moves upwards to the highest position of the redundant metal powder layer, then moves to the other end of the redundant metal powder layer along the primary powder spreading direction, and vertically moves downwards to a set height position required by the system in powder spreading;
after selective laser melting forming, the powder spreading scraper moves along the direction opposite to the primary powder spreading direction to spread the redundant metal powder layer to a forming area.
According to a further technical scheme, the powder provided by the powder supply system at a time is 1-2 times more than the powder required by the forming of a metal part at a time.
The invention has the beneficial effects that: the bidirectional powder spreading system comprises a vertical cutter lifting device and a horizontal powder spreading system, wherein the vertical cutter lifting device comprises a cutter device mounting seat, a vertical moving mechanism and a powder spreading scraper; the powder spreading scraper moves downwards to a set height position required by the system during powder spreading, the horizontal powder spreading system drives the vertical cutter lifting device, the powder spreading scraper moves to spread metal powder in the forming area, and after one-time powder spreading is finished, the powder spreading scraper is positioned at one end of the redundant metal powder layer; the powder spreading scraper vertically moves upwards to the highest position of the redundant metal powder layer and then moves along the reverse direction of the primary powder spreading direction until the powder spreading scraper is positioned at the other end of the redundant metal powder layer; and then controlling the powder spreading scraper to move downwards to a set height position required by the system during powder spreading, after selective laser melting and forming, driving the powder spreading scraper to move reversely by the horizontal powder spreading system, and reversely spreading the redundant metal powder layer to a forming area to finish bidirectional powder spreading. According to the invention, through the movement of the powder spreading scraper, the bidirectional powder spreading is completed on the premise that the powder supply system provides primary powder, so that the powder spreading time is greatly reduced, the forming speed and efficiency of the equipment are improved, and the printing efficiency of the SLM equipment is obviously improved; meanwhile, the problem that the powder layer in the forming area is damaged when the SLM equipment performs metal powder forming and the powder spreading system scrapes back is solved, and the forming quality of the formed part of the equipment is improved.
Drawings
FIG. 1 is an axial view of a bi-directional powder spreading system of the SLM apparatus of the present invention;
FIG. 2 is a front view of a vertical knife lifting device in the bi-directional powder paving system of the present invention;
FIG. 3 is an axial view of a vertical knife lifting device in the bi-directional powder paving system of the present invention;
FIG. 4 is a flow chart of a bidirectional powder laying method of the SLM device according to the present invention;
illustration of the drawings: the method comprises the following steps of 1-lifting a cutter device mounting base, 2-a miniature linear motor, 3-a guide rail, 4-a guide rail motor connecting plate, 5-a powder spreading scraper, 6-a motor controller, 7-a position feedback device, 8-a vertical cutter lifting device and 9-a horizontal powder spreading system.
Detailed Description
The present invention is further illustrated by the following detailed description in conjunction with the accompanying drawings, it being understood that the following detailed description is illustrative of the invention only and is not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which will occur to those skilled in the art upon reading the present specification.
The SLM equipment powder laying system in the prior art only carries out one-dimensional motion in the horizontal direction, the one-dimensional motion of the powder laying system supplies powder once to the powder supply system in the forming process of the SLM equipment, the powder laying system lays a layer of powder in a forming area, the powder laying efficiency is low, and the powder layer in the forming area is damaged in the process of scraping back in the powder laying system. As shown in fig. 1, the bidirectional powder spreading system of the SLM device of the present invention includes a vertical blade lifting device 8 and a horizontal powder spreading system 9, where the vertical blade lifting device 8 is vertically installed outside the horizontal powder spreading system 9.
As shown in fig. 2 and 3, the vertical cutter lifting device 8 comprises a cutter lifting device mounting base 1, a micro linear motor 2, a guide rail 3, a guide rail motor connecting plate 4, a powder spreading scraper 5, a motor controller 6 and a position feedback device 7, and an output shaft of the micro linear motor 2 can stretch and retract; one end of a cutter lifting device mounting seat 1 is vertically and fixedly connected with a horizontal powder spreading system 9 through a T-shaped mounting plate, a micro linear motor 2 is mounted on one side of the cutter lifting device mounting seat 1, two guide rails 3 are symmetrically mounted on two sides of the micro linear motor 2, an output shaft of the micro linear motor 2 is connected with the top end of a guide rail motor connecting plate 4, two sides of the guide rail motor connecting plate 4 are locked with a sliding block inside the guide rail 3, a powder spreading scraper 5 is fixed at the bottom end of the guide rail motor connecting plate 4, and reliable and stable vertical motion guide is provided by the guide rails 3 on two sides when the micro linear motor 2 moves up and down, so that the guide rail motor connecting plate 4 is driven, and the up-and-down motion of the powder spreading scraper 5 is realized; the miniature linear motor 2 is in signal connection with the motor controller 6, the position feedback device 7 is arranged on the miniature linear motor 2, and the position feedback device 7 monitors the running position of the miniature linear motor 2 in real time and feeds back the motor controller 6, so that the movement of the miniature linear motor 2 is controlled, and the closed-loop control of the miniature linear motor 2 is realized.
In the embodiment, the micro linear motor 2 can be replaced by a cylinder, compressed gas is used as a power source of the cylinder, a piston of the cylinder is connected with the top end of the guide rail motor connecting plate 4, the power source supply of the cylinder is realized by controlling an electromagnetic valve through a controller, and then the up-and-down movement of the guide rail motor connecting plate 4 and the powder spreading scraper 5 is realized by the expansion and contraction of the piston; the air cylinder is used for an SLM equipment powder spreading system with vertical movement precision within 0.05mm-0.1mm, and the SLM equipment powder spreading system provided with the air cylinder can be not provided with the position feedback device 7.
In the embodiment, the micro linear motor 2 can be replaced by an electromagnet, the electromagnet is connected with the top end of the guide rail motor connecting plate 4 through a spring, the guide rail motor connecting plate 4 is made of a magnetic material, and the electromagnet is controlled by a relay and a controller to be electrified or not, so that the attraction of the guide rail motor connecting plate 4 is realized, and the powder spreading scraper 5 is driven to move up and down; the electromagnet is used for the powder spreading system of the SLM equipment with the vertical movement precision of 0.05mm-0.1mm, and the powder spreading system of the SLM equipment provided with the electromagnet can be provided with no position feedback device 7.
In this embodiment, if the space for installing the vertical cutter lifting device is limited, the guide rail 3 may be installed only on one side of the micro linear motor 2.
The size of the micro linear motor 2 is in the range of 40mm x 20mm x 50mm (length x width x height), preferably 25mm x 11mm x 35mm in the present embodiment, and the micro linear motor can be used in a very limited space; and the positioning precision of the powder spreading scraper 5 is controlled within 0.01mm through a position feedback device 7. The up-and-down movement stroke range of the micro linear motor 2 is controlled by the motor controller 6, the stroke range of the micro linear motor 2 is set within 10mm, and if the movement stroke needs to be increased or reduced, the control parameter of the motor controller 6 can be changed.
The working principle of the present invention is described below by taking the micro linear motor 2 as an example: after the vertical knife lifting device 8 is added, the SLM equipment powder laying system can perform two-dimensional motion in the horizontal direction and the vertical direction. By utilizing the bidirectional powder spreading system of the SLM equipment, the powder provided by the powder supply system of the SLM equipment at a time is generally 1-2 times more than the powder required by the molding of a metal part at a time, and the powder proportion provided by the powder supply system at a time can be set in the system where the SLM equipment is located. After the powder supply system of the SLM equipment provides powder for one time, the motor controller 6 controls the micro linear motor 2 to move downwards, so that the powder paving scraper 5 is just positioned at a set height position (arranged in the motor controller 6) required by the powder paving of the system; the horizontal powder spreading system 9 starts to move horizontally to the right to drive the powder spreading scraper 5 to spread the metal powder to the forming area of the SLM equipment, redundant powder of the metal powder is left at the right end of the forming area in the powder spreading process, and one-time powder spreading action is completed; the powder spreading scraper 5 is positioned at the left end of the redundant metal powder layer at the horizontal left and right opposite positions. After the primary powder spreading action is completed, the micro linear motor 2 moves upwards under the control of the motor controller 6 to drive the powder spreading scraper 5 to vertically lift up until the highest position (arranged in the motor controller 6) of the redundant metal powder layer at the right end of the forming area ensures that the powder spreading scraper 5 is not contacted with powder or a printing part of a forming surface in a non-powder spreading state, the horizontal powder spreading system 9 moves rightwards (the movement stroke is generally 20mm, and can be set), so that the powder spreading scraper 5 is positioned at the right end of the redundant metal powder layer at the relative positions of the left side and the right side of the horizontal direction, and the horizontal powder spreading system 9 stops moving. The micro linear motor 2 moves downwards to drive the powder spreading scraper 5 to vertically return to a set height position required by powder spreading. The action flow is to move the powder spreading scraper 5 from the left end to the right end of the multiple metal powder layers to prepare for the next powder spreading; the powder spreading scraper 5 is positioned at the right end of the redundant metal powder layer at the horizontal left and right opposite positions.
After selective laser melting forming of the powder paved on the upper layer is finished, the horizontal powder paving system 9 directly drives the vertical cutter lifting device 8 to move leftwards, the redundant metal powder in the previous step is paved on a forming area of the SLM device through the powder paving scraper 5, bidirectional powder paving is finished under the condition that the powder supply system of the SLM device is not needed to supply secondary powder, and therefore the overall powder paving efficiency is greatly improved.
The following describes a bidirectional powder spreading method of the SLM device of the present invention by taking the micro linear motor 2 as an example, as shown in fig. 4, specifically including the following steps:
the powder supply system provides a proper amount of metal powder;
the motor controller 6 controls the micro linear motor 2 to drive the powder paving scraper 5 to vertically move downwards and move to a set height position required by the system in powder paving;
the horizontal powder laying system 9 drives the vertical cutter lifting device 8 to enable the powder laying scraper 5 to horizontally move rightwards, powder is laid in a forming area for selective laser melting forming, redundant powder is left at the right end of the forming area, and the powder laying scraper 5 is located at the left end of the redundant metal powder layer;
the powder spreading scraper 5 vertically moves upwards and moves to the highest position of the redundant metal powder layer;
the horizontal powder paving system 9 drives the vertical cutter lifting device 8 to enable the powder paving scraper 5 to horizontally move rightwards and move to the right end of the redundant metal powder layer;
the powder spreading scraper 5 vertically moves downwards and moves to a set height position required by the powder spreading of the system;
after the selective laser melting forming is finished, the powder paving scraper 5 horizontally moves leftwards, the previous redundant powder is paved in a forming area for selective laser melting forming, and the powder paving scraper 5 is positioned at the right end of the redundant metal powder layer;
the powder spreading scraper 5 vertically moves upwards and moves to the highest position of the redundant metal powder layer;
the horizontal powder spreading system 9 drives the vertical cutter lifting device 8, so that the powder spreading scraper 5 moves leftwards horizontally and moves to the left end of the powder supply system to start a new powder spreading process.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The detailed description is presented to facilitate a person skilled in the art to make and use the invention and is not intended to limit the scope of the invention. After reading the present disclosure, appropriate modifications can be made by those skilled in the art. The protection of the present invention is subject to the content of the claims. Various modifications, alterations, substitutions and the like can be made to the present invention without departing from the spirit and scope of the claims.
Claims (10)
1. The bidirectional powder paving system of the SLM equipment is characterized by comprising a horizontal powder paving system (9) and a vertical cutter lifting device (8) which is vertically arranged on the outer side of the horizontal powder paving system (9); the vertical knife lifting device (8) comprises a knife lifting device mounting seat (1), a vertical moving mechanism and a powder spreading scraper (5), the knife lifting device mounting seat (1) is mounted on the outer side of a horizontal powder spreading system (9), the vertical moving mechanism is mounted on the knife lifting device mounting seat (1), the vertical moving mechanism is fixed with the powder spreading scraper (5), and the powder spreading scraper (5) moves up and down under the driving of the vertical moving mechanism.
2. The two-way powder spreading system of the SLM device as claimed in claim 1, wherein the vertical moving mechanism is a micro linear motor (2), the micro linear motor (2) is mounted on the cutter lifting device mounting base (1), the micro linear motor (2) is provided with a position feedback device (7), and the micro linear motor (2) and the feedback device (7) are in signal connection with the motor controller (6).
3. The two-way powder spreading system of the SLM device as claimed in claim 2, wherein the output shaft of the micro linear motor (2) is connected with the top end of a guide rail motor connecting plate (4), the guide rail motor connecting plate (4) is locked with a slide block inside the guide rail (3), and the powder spreading scraper (5) is fixed at the bottom end of the guide rail motor connecting plate (4).
4. A bi-directional powder spreading system of an SLM device according to claim 3, characterized in that the length x width x height of the micro linear motor (2) is in the range of 40mm x 20mm x 50 mm.
5. Bidirectional powder spreading system of an SLM device according to claim 4, characterized in that the stroke range of the micro linear motor (2) is set within 10 mm.
6. The two-way powder spreading system of the SLM device as claimed in claim 1, wherein the vertical moving mechanism is a cylinder, a piston of the cylinder is connected with the top end of a guide rail motor connecting plate (4), the guide rail motor connecting plate (4) is locked with a slide block inside the guide rail (3), and a powder spreading scraper (5) is fixed at the bottom end of the guide rail motor connecting plate (4); the power supply of the cylinder is realized by controlling the electromagnetic valve through the controller.
7. The two-way powder spreading system of the SLM device, according to claim 1, wherein the vertical moving mechanism is an electromagnet, the electromagnet is connected with a guide rail motor connecting plate (4) through a spring, the guide rail motor connecting plate (4) is locked with a sliding block inside the guide rail (3), and a powder spreading scraper (5) is fixed at the bottom end of the guide rail motor connecting plate (4); the guide rail motor connecting plate (4) is made of magnetic materials, and the electromagnet is controlled by a relay and a controller to be electrified or not.
8. The bi-directional powder spreading system of the SLM device as claimed in claim 3 or 6 or 7, characterized in that the number of the guide rails (3) is 1 or 2, and the guide rails (3) are fixed at the side of the vertical moving mechanism.
9. A powder spreading method of a bi-directional powder spreading system of an SLM device according to any one of claims 1 to 8, characterized by:
the powder supply system provides a proper amount of metal powder, the powder spreading scraper (5) vertically moves downwards to a height position set during powder spreading of the system, the vertical cutter lifting device (8) is driven by the horizontal powder spreading system (9) to horizontally move, the powder spreading scraper (5) spreads the powder to a forming area, and after the powder spreading is completed for one time, the powder spreading scraper (5) is positioned at one end of the redundant metal powder layer;
the powder spreading scraper (5) vertically moves upwards to the highest position of the redundant metal powder layer, then moves to the other end of the redundant metal powder layer along the primary powder spreading direction, and the powder spreading scraper (5) vertically moves downwards to a set height position required by the system during powder spreading;
after selective laser melting forming, the powder spreading scraper (5) moves along the direction opposite to the primary powder spreading direction to spread the redundant metal powder layer to a forming area.
10. The method of claim 9, wherein the powder supply system provides 1-2 times more powder at a single time than is required for a single metal part forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961413.1A CN114260473A (en) | 2020-09-14 | 2020-09-14 | Two-way powder paving system and method of SLM (Selective laser melting) equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961413.1A CN114260473A (en) | 2020-09-14 | 2020-09-14 | Two-way powder paving system and method of SLM (Selective laser melting) equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114260473A true CN114260473A (en) | 2022-04-01 |
Family
ID=80824074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010961413.1A Pending CN114260473A (en) | 2020-09-14 | 2020-09-14 | Two-way powder paving system and method of SLM (Selective laser melting) equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114260473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985774A (en) * | 2022-07-08 | 2022-09-02 | 苏州中科煜宸激光智能科技有限公司 | Powder supply device for compact SLM printer |
-
2020
- 2020-09-14 CN CN202010961413.1A patent/CN114260473A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985774A (en) * | 2022-07-08 | 2022-09-02 | 苏州中科煜宸激光智能科技有限公司 | Powder supply device for compact SLM printer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110494238B (en) | Additive manufacturing using recoater with in-situ replaceable recoater blades | |
| US10315408B2 (en) | Additive manufacturing apparatus and method | |
| CN107087400B (en) | Machine and method for powder-based additive manufacturing | |
| CN104550953B (en) | A kind of two-cylinder type desktop type selective laser melt-forming Apparatus and method for | |
| CN110121406B (en) | Method for additive manufacturing and spoke support | |
| CN111267344B (en) | Multi-partition array type selective melting manufacturing equipment and process | |
| US20110223349A1 (en) | Powder Dispensing Apparatus and Method | |
| KR101649756B1 (en) | Powder feeding apparatus for three dimemsional printer | |
| CN213997802U (en) | Two-way powder paving system of SLM equipment | |
| CN104785780A (en) | Device and method for improving strength of selective laser sintering 3D printing part | |
| CN106735220A (en) | A kind of many material laser selective melting shaped devices and method | |
| CN106111985A (en) | Group scan laser selective sintering or curing and 3D forming machine thereof | |
| CN114260473A (en) | Two-way powder paving system and method of SLM (Selective laser melting) equipment | |
| KR20160141144A (en) | 3-dimensional laser sintering printer | |
| KR101936495B1 (en) | 3D printing apparatus using rotating roller inside powder supplyng hopper | |
| CN111922339A (en) | 3D printing method and device for powder bed | |
| CN111465461A (en) | Device for producing a three-dimensional object layer by layer | |
| CN109968664B (en) | Three-dimensional object manufacturing equipment, preheating device and cylinder heating mechanism | |
| CN114378918B (en) | Additive manufacturing apparatus for ceramic and additive manufacturing method for ceramic | |
| CN109396431B (en) | Movable wall for additive powder bed | |
| CN110480589B (en) | Leveling system and method for material adding operation platform | |
| CN107824787B (en) | Equipment for manufacturing three-dimensional object and powder feeding device | |
| US20190314930A1 (en) | Method for additively manufacturing at least one three-dimensional object | |
| CN107160677B (en) | A method of prevent the workpiece in SLS moulding process from staggered floor occurs | |
| JP4141379B2 (en) | Method and apparatus for modeling a three-dimensional object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |