CN109249023B - 3D printing method for preventing scratch and 3D printing system - Google Patents
3D printing method for preventing scratch and 3D printing system Download PDFInfo
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- CN109249023B CN109249023B CN201811152563.7A CN201811152563A CN109249023B CN 109249023 B CN109249023 B CN 109249023B CN 201811152563 A CN201811152563 A CN 201811152563A CN 109249023 B CN109249023 B CN 109249023B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/362—Process control of energy beam parameters for preheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/70—Gas flow means
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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
- B33Y10/00—Processes of additive manufacturing
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/70—Recycling
- B22F10/77—Recycling of gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/49—Scanners
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to the field of 3D printing, in particular to a 3D printing method for preventing scratch and a 3D printing system, wherein the 3D printing method specifically comprises the following steps: setting a powder supply starting position and a powder supply finishing position on the platform; the powder scraping shaft scrapes powder from the powder supply starting position to the powder supply finishing position to form a layer sheet, and the powder scraping shaft stays at the powder supply finishing position; laser printing the layer sheet; descending the platform to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and a preset height; the powder scraping shaft moves to a powder supply initial position; lifting the platform by a preset height; and repeating the steps until the complete product is printed. Scrape the powder axle before returning and supply powder initial position, the platform drives fashioned product decline height earlier, scrapes the powder axle afterwards and returns and supply powder initial position, avoids sintering perk's part on the product to disturb the return motion of scraping the powder axle to avoid scraping the damage of powder axle, improve the life who scrapes the powder axle.
Description
Technical Field
The invention relates to the field of 3D printing, in particular to a 3D printing method for preventing scratches and a 3D printing system.
Background
With the rapid development of science and technology, 3D printing technology is also studied more and more deeply, and various 3D printing systems are also developed in our work and life. When 3D prints, often realize through subtracting the material system cooperation, increase and decrease material combined machining system is one kind and will increase material manufacturing and subtract integrative combined system of material processing for two kinds of system advantages are complementary.
The conventional 3D printing is powder-spreading type 3D printing, metal powder is irradiated by focused low-power-density laser beams, the irradiated metal powder is rapidly sintered, and meanwhile, the metal powder is sintered and formed by controlling the oxygen content, the air pressure and the temperature, so that the layer-by-layer printing is realized, and the 3D printing is finally realized.
However, in the printing process, laser sintering is tilted due to the use of metal powder for printing, if the powder is directly scraped back and forth for each layer of printed powder scraping shafts, the powder scraping shafts are scraped with a molded product in the process of returning to the powder supply starting position, and the used powder scraping shafts are damaged due to rubbing.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a scratch-resistant 3D printing method and a 3D printing system, which solve the problem that a powder scraping shaft is easily scratched with a sintered and tilted product in the process of returning to a powder supply start position, in view of the above-mentioned defects in the prior art.
In order to solve the technical problem, the invention provides a 3D printing method for preventing scratches, and the 3D printing method specifically comprises the following steps: step 1, setting a powder supply starting position and a powder supply finishing position on a platform; step 2, the powder scraping shaft scrapes powder from the powder supply starting position to the powder supply finishing position to form a layer sheet, and the powder scraping shaft stays at the powder supply finishing position; step 3, carrying out laser printing on the lamination; step 4, the platform descends to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and the preset height; step 5, moving the powder scraping shaft to a powder supply initial position; step 6, lifting the platform by a preset height; and 7, repeating the steps 2-6 until a complete product is printed.
Preferably, the step 1 specifically includes the following steps: forming a surface image of the platform; and identifying two end edges of the platform according to the surface image, and taking one end edge as a powder supply starting position and the other end edge as a powder supply finishing position.
Preferably, the preset height ranges from 0.01mm to 0.05 mm.
Preferably, the step 3 specifically includes the following steps: the dynamic focusing unit adjusts laser emitted by the laser to the vibrating mirror into a large light spot and a small light spot in sequence, the large light spot laser is used for preheating the lamina, and the small light spot laser is used for processing the lamina.
Preferably, the 3D printing method further includes the steps of: air is pumped out to make the upper part of the platform in a vacuum state.
Preferably, the 3D printing method further includes the steps of: inert gas is introduced, and the inert gas is purified and filtered during the circulating motion.
The invention also provides a 3D printing system, wherein the 3D printing system is used for realizing the 3D printing method, and comprises a processor, a platform, a powder supply cylinder, a powder scraping shaft, a laser assembly and a lifting assembly, wherein the processor sets a powder supply starting position and a powder supply ending position on the platform; until a complete product is printed, the processor controls the powder scraping shaft to scrape powder in the powder supply cylinder from a powder supply starting position to a powder supply finishing position for multiple times to form a laminated sheet, and the powder scraping shaft stays at the powder supply finishing position; controlling the laser assembly to perform laser printing on the layer; controlling a lifting assembly to drive a platform to descend to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and a preset height; controlling the powder scraping shaft to move to a powder supply initial position; and controlling the platform to ascend by a preset height.
The laser assembly comprises a dynamic focusing unit, a laser and a vibrating mirror, wherein the dynamic focusing unit adjusts laser emitted to the vibrating mirror by the laser to be a large light spot and a small light spot in sequence, the large light spot laser is used for preheating lamina, and the small light spot laser is used for machining lamina.
Preferably, the 3D printing system further comprises a vacuum pump, wherein the vacuum pump pumps air to make the upper part of the platform in a vacuum state.
The 3D printing system further comprises a gas supply mechanism, a gas transportation mechanism and a gas purification mechanism, wherein the gas supply mechanism is used for providing inert gas, the gas purification mechanism is arranged in the gas transportation mechanism, the gas supply mechanism is filled with inert gas, the inert gas moves to the inside of the gas transportation mechanism and circulates, and the gas purification mechanism is used for purifying and filtering the inert gas.
Compared with the prior art, the scratch-proof 3D printing method and the scratch-proof 3D printing system have the advantages that before the powder scraping shaft returns to the powder supply initial position, the platform drives the formed product to descend by a height, then the powder scraping shaft returns to the powder supply initial position, the sintered and tilted part on the product is prevented from interfering the return movement of the powder scraping shaft, the damage to the powder scraping shaft is avoided, and the service life of the powder scraping shaft is prolonged; in addition, when 3D printing is carried out, large-spot laser is used for heating the laminated sheet, so that the laminated sheet is prevented from being warped and deformed by thermal stress.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block flow diagram of a 3D printing method of the present invention;
FIG. 2 is a block diagram of the process for setting the powder feeding start position and the powder feeding end position according to the present invention;
FIG. 3 is a block flow diagram of laser printing a laminate according to the present invention;
FIG. 4 is a block diagram of the air extraction process of the present invention;
FIG. 5 is a block diagram of the process of introducing inert gas according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention provides a preferred embodiment of a scratch-resistant 3D printing method.
Specifically, referring to fig. 1, a 3D printing method for preventing scratches and scratches includes the following steps:
step 1, setting a powder supply starting position and a powder supply finishing position on a platform;
step 2, the powder scraping shaft scrapes powder from the powder supply starting position to the powder supply finishing position to form a layer sheet, and the powder scraping shaft stays at the powder supply finishing position;
step 3, carrying out laser printing on the lamination;
step 4, the platform descends to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and the preset height;
step 5, moving the powder scraping shaft to a powder supply initial position;
step 6, lifting the platform by a preset height;
and 7, repeating the steps 2-6 until a complete product is printed.
The processor acquires a picture on the platform, and sets a powder supply starting position and a powder supply ending position in the picture; then, the processor controls the powder scraping shaft to scrape the powder for printing from the powder supply starting position to the powder supply ending position to form a layer sheet, and the powder scraping shaft stops when the powder scraping shaft scrapes to the powder supply ending position; then, the processor controls the laser assembly to perform 3D laser printing on the lamination to form one layer of the preformed product; after the 3D printing task of the layer is finished, the processor controls the platform to drive the formed product to descend to calculate the height, wherein the calculated height comprises the layer height of the formed product on the previous layer and a preset height; then, the processor controls the powder scraping shaft to move back to the powder supply starting position, and particularly, the powder scraping shaft is not affected by scraping and rubbing in the process of smoothly returning to the powder supply starting position even if the molded product is sintered and tilted under the action of laser because the platform is descended by a certain height; then, the processor controls the platform to ascend by a preset height, and the layer sheet is just positioned at the topmost end, so that the powder scraping shaft can conveniently conduct the next powder scraping operation on the topmost layer sheet; repeatedly scrape the powder axle and scrape the powder, laser subassembly prints, and the platform descends to calculate the height, scrapes the powder axle and resets, and the platform rises to predetermine the step of height, prints until accomplishing the 3D of product completely. In the whole 3D printing process, the powder scraping shaft cannot be affected by tilting, so that the service life of the powder scraping shaft is prolonged.
Preferably, the preset height ranges from 0.01mm to 0.05 mm. It should be noted that, when the platform descends each time, the preset heights may be the same or different, and the preset heights only need to just avoid scraping the scraping shaft by the sintered and tilted product.
More specifically, referring to fig. 2, the step 1 specifically includes the following steps:
step 11, forming a surface image of the platform;
and 12, identifying two end edges of the platform according to the surface image, and taking one end edge as a powder supply starting position and the other end edge as a powder supply finishing position.
The processor acquires a surface image of the platform, wherein the surface of the platform is a rectangle conventionally, and then the processor identifies two opposite end edges of the platform according to the surface image, the two end edges are parallel to each other, one end edge is set as a powder supply starting position, and the other end edge is set as a powder supply finishing position. Thereafter, the powder scraping shaft is disposed parallel to the end edges and moved in a direction perpendicular to the end edges to scrape the powder from one end edge to the other.
Of course, after the processor obtains the surface image of the platform, a linear position can be set as a powder supply starting position at will, another linear position is set as a powder supply ending position, the two linear positions are arranged at a certain angle, and the powder scraping shaft scrapes the other linear position from the linear position to do fan-shaped movement. The method is not limited in this regard, and only the laid layer sheet can meet the requirements of subsequent 3D printing.
Still more specifically, referring to fig. 3, the step 3 specifically includes the following steps:
and step 31, the dynamic focusing unit adjusts laser emitted to the vibrating mirror by the laser to be large light spots and small light spots in sequence, the large light spot laser is used for preheating the laminated sheet, and the small light spot laser is used for processing the laminated sheet.
The laser assembly comprises a dynamic focusing unit, a laser and a vibrating mirror, wherein the dynamic focusing unit is connected with the laser, when the laser is ready to form laser and emits towards the vibrating mirror, the dynamic focusing unit adjusts the preformed laser into a large light spot, the large light spot laser emits towards the vibrating mirror, and the vibrating mirror reflects the large light spot laser to a lamina to preheat the lamina; and then, the dynamic focusing unit gradually adjusts the formed laser to be a small light spot, the small light spot laser irradiates to the vibrating mirror, the vibrating mirror reflects the small light spot laser to the laminated sheet, and 3D laser printing operation is carried out on the laminated sheet. The lamina is heated by large-spot laser, so that the lamina can be prevented from warping and deforming due to thermal stress.
Further, referring to fig. 4, the 3D printing method further includes the steps of:
and step 13, extracting air to enable the upper part of the platform to be in a vacuum state.
Before 3D printing is carried out, the platform is arranged in a closed cavity, the closed cavity is connected with a vacuum pump through an exhaust pipe, the vacuum pump is started, air is pumped away through the exhaust pipe, the upper portion of the platform is in a vacuum state, namely, the upper portion of the lamina is in the vacuum state, and therefore when inert gas is provided subsequently, only inert gas is arranged above the platform, and other impurity air is not provided.
Still further, referring to fig. 5, the 3D printing method further includes the steps of:
and step 14, introducing inert gas, and purifying and filtering the inert gas during the circulation movement.
Wherein, after the air in the closed cavity is extracted, inert gas is introduced; still be equipped with the clarifier in the airtight cavity, inert gas is at airtight cavity internal cycle motion, and when laser subassembly carried out 3D printing operation to the lamination, can produce a large amount of powders, the clarifier can be for inert gas purification filtration. The inert gas refers to elements in group 18 of the periodic table, and at normal temperature and pressure, the inert gas is a colorless and odorless monatomic gas, and chemical reaction is difficult to perform; therefore, the laser printing is carried out after the inert gas is introduced, and the generation of unnecessary impurities caused by chemical reaction can be avoided.
The invention also provides a preferred embodiment of the 3D printing system.
The 3D printing system is used for realizing the 3D printing method, and comprises a processor, a platform, a powder supply cylinder, a powder scraping shaft, a laser assembly and a lifting assembly, wherein the processor sets a powder supply starting position and a powder supply ending position on the platform; until a complete product is printed, the processor controls the powder scraping shaft to scrape powder in the powder supply cylinder from a powder supply starting position to a powder supply finishing position for multiple times to form a laminated sheet, and the powder scraping shaft stays at the powder supply finishing position; controlling the laser assembly to perform laser printing on the layer; controlling a lifting assembly to drive a platform to descend to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and a preset height; controlling the powder scraping shaft to move to a powder supply initial position; and controlling the platform to ascend by a preset height. In the whole 3D printing process, the powder scraping shaft cannot be affected by the upwarping of the formed product, so that the service life of the powder scraping shaft is prolonged.
Preferably, the preset height is 0.01mm to 0.05 mm. It should be noted that, when the platform descends each time, the preset heights may be the same or different, and the preset heights only need to just avoid scraping the scraping shaft by the sintered and tilted product.
Further, the laser assembly comprises a dynamic focusing unit, a laser and a vibrating mirror, wherein the dynamic focusing unit is connected with the laser, when the laser is ready to form laser and emits towards the vibrating mirror, the dynamic focusing unit adjusts the preformed laser into a large spot, the large spot laser emits towards the vibrating mirror, and the vibrating mirror reflects the large spot laser to the lamina for preheating the lamina; and then, the dynamic focusing unit gradually adjusts the formed laser to be a small light spot, the small light spot laser irradiates to the vibrating mirror, the vibrating mirror reflects the small light spot laser to the laminated sheet, and 3D laser printing operation is carried out on the laminated sheet. The lamina is heated by large-spot laser, so that the lamina can be prevented from warping and deforming due to thermal stress.
And before the 3D printing is carried out, the platform is positioned in a closed cavity, the closed cavity is connected with a vacuum pump through an exhaust pipe, the vacuum pump is started, air is pumped away through the exhaust pipe, the upper part of the platform is in a vacuum state, namely, the upper part of the lamina is in a vacuum state, and therefore when inert gas is subsequently provided, only inert gas is arranged above the platform, and other impurity air is not arranged.
Furthermore, 3D printing system still includes air feed mechanism, gaseous transport mechanism and the gaseous mechanism that purifies that is used for providing inert gas, gaseous mechanism that purifies locates in the gaseous transport mechanism, air feed mechanism lets in inert gas, inert gas moves to the inside and circulation of gaseous transport mechanism, gaseous mechanism that purifies is inert gas purification filtration.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A3D printing method for preventing scratch is characterized by comprising the following steps:
step 1, setting a powder supply starting position and a powder supply finishing position on a platform;
step 2, the powder scraping shaft scrapes powder from the powder supply starting position to the powder supply finishing position to form a layer sheet, and the powder scraping shaft stays at the powder supply finishing position;
step 3, carrying out laser printing on the lamination;
step 4, the platform descends to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and the preset height;
step 5, moving the powder scraping shaft to a powder supply initial position;
step 6, lifting the platform by a preset height;
and 7, repeating the steps 2-6 until a complete product is printed.
2. The 3D printing method according to claim 1, wherein the step 1 specifically comprises the steps of:
forming a surface image of the platform;
and identifying two end edges of the platform according to the surface image, and taking one end edge as a powder supply starting position and the other end edge as a powder supply finishing position.
3. 3D printing method according to claim 1 or 2, characterized in that the preset height ranges from 0.01mm to 0.05 mm.
4. The 3D printing method according to claim 1, wherein the step 3 specifically comprises the steps of:
the dynamic focusing unit adjusts laser emitted by the laser to the vibrating mirror into a large light spot and a small light spot in sequence, the large light spot laser is used for preheating the lamina, and the small light spot laser is used for processing the lamina.
5. The 3D printing method according to claim 1, wherein the 3D printing method further comprises the steps of:
air is pumped out to make the upper part of the platform in a vacuum state.
6. The 3D printing method according to claim 5, wherein the 3D printing method further comprises the steps of:
inert gas is introduced, and the inert gas is purified and filtered during the circulating motion.
7. A3D printing system, wherein the 3D printing system is used for realizing the 3D printing method according to any one of claims 1 to 6, the 3D printing system comprises a processor, a platform, a powder supply cylinder, a powder scraping shaft, a laser assembly and a lifting assembly, wherein,
the processor sets a powder supply starting position and a powder supply ending position on the platform; until a complete product is printed, the processor controls the powder scraping shaft to scrape powder in the powder supply cylinder from a powder supply starting position to a powder supply finishing position for multiple times to form a laminated sheet, and the powder scraping shaft stays at the powder supply finishing position; controlling the laser assembly to perform laser printing on the layer; controlling a lifting assembly to drive a platform to descend to calculate the height, wherein the calculated height is the sum of the layer height of the upper layer and a preset height; controlling the powder scraping shaft to move to a powder supply initial position; and controlling the platform to ascend by a preset height.
8. The 3D printing system according to claim 7, wherein the laser assembly comprises a dynamic focusing unit, a laser and a galvanometer, the dynamic focusing unit adjusts laser emitted by the laser to the galvanometer into a large spot and a small spot in sequence, the large spot laser is used for ply preheating, and the small spot laser is used for ply processing.
9. The 3D printing system of claim 8, further comprising a vacuum pump that draws air to a vacuum above the platform.
10. The 3D printing system according to claim 9, further comprising a gas supply mechanism for providing an inert gas, a gas transportation mechanism, and a gas purification mechanism, wherein the gas purification mechanism is disposed in the gas transportation mechanism, the gas supply mechanism is filled with the inert gas, the inert gas moves into the gas transportation mechanism and circulates, and the gas purification mechanism purifies and filters the inert gas.
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| CN201811152563.7A CN109249023B (en) | 2018-09-29 | 2018-09-29 | 3D printing method for preventing scratch and 3D printing system |
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| CN113399664B (en) * | 2020-03-16 | 2023-07-14 | 大族激光科技产业集团股份有限公司 | Printing method and device for powder laying type 3D printing device |
| CN112622267B (en) * | 2020-11-10 | 2023-04-07 | 南方科技大学 | 3D printing method |
| CN113442258B (en) * | 2021-01-25 | 2022-08-02 | 山东大学 | 3D printer and method for digitally manufacturing composite ceramic functional gradient material |
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| JP5061062B2 (en) * | 2008-08-08 | 2012-10-31 | パナソニック株式会社 | Manufacturing method of three-dimensional shaped object |
| JP5186306B2 (en) * | 2008-08-25 | 2013-04-17 | パナソニック株式会社 | Manufacturing method of three-dimensional shaped object |
| CN103862045B (en) * | 2014-03-13 | 2017-01-18 | 湖南华曙高科技有限责任公司 | Powder supplying and spreading method of quick forming equipment |
| CN104001916B (en) * | 2014-05-26 | 2016-05-04 | 华南理工大学 | A kind of absorption type face of laser selective melting formation system contacts flexible power spreading device |
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| US11167454B2 (en) * | 2017-01-13 | 2021-11-09 | General Electric Company | Method and apparatus for continuously refreshing a recoater blade for additive manufacturing |
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Effective date of registration: 20210914 Address after: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee after: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Patentee after: Tianjin Han's Intelligent Equipment Co.,Ltd. Address before: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Patentee before: HAN'S LASER SMART EQUIPMENT GROUP Co.,Ltd. |