CN114951690B - Forming method and three-dimensional forming equipment for three-dimensional model - Google Patents
Forming method and three-dimensional forming equipment for three-dimensional model Download PDFInfo
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- CN114951690B CN114951690B CN202110199634.4A CN202110199634A CN114951690B CN 114951690 B CN114951690 B CN 114951690B CN 202110199634 A CN202110199634 A CN 202110199634A CN 114951690 B CN114951690 B CN 114951690B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000000465 moulding Methods 0.000 claims abstract description 134
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims description 38
- 238000003892 spreading Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 230000003746 surface roughness Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
- B29C64/264—Arrangements for irradiation
- B29C64/268—Arrangements for irradiation using laser beams; using electron beams [EB]
-
- 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
- B29C64/264—Arrangements for irradiation
- B29C64/291—Arrangements for irradiation for operating globally, e.g. together with selectively applied activators or inhibitors
-
- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
-
- 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
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Abstract
The application provides a molding method of a three-dimensional model, which comprises the following steps: importing the three-dimensional model into an XYZ coordinate system, and slicing the three-dimensional model to obtain forming layer parameters of the three-dimensional model; paving material powder according to the parameters of the forming layer; identifying a first molding zone and a second molding zone of the molding layer, the second molding zone being a side region of the molding layer; the forming laser reciprocates in the first forming area and the second forming area according to a preset path, a forming layer is formed by melting material powder, the forming laser scans the first forming area with first power, the forming laser scans the second forming area with second power, the first power is larger than the second power, energy injection into the second forming area is reduced, excessive melting of the material powder is avoided, side processing precision and surface roughness of the three-dimensional model are improved, forming support quantity of the three-dimensional model can be effectively reduced, and cost is further reduced. The application also provides three-dimensional forming equipment applying the forming method.
Description
Technical Field
The present disclosure relates to the field of three-dimensional molding, and in particular, to a method for molding a three-dimensional model and a three-dimensional molding apparatus using the same.
Background
The laser three-dimensional forming technology relies on laser energy injection to sinter the material powder, so as to obtain a forming entity with good compactness. However, in the prior art, a fixed parameter laser is typically used to scan the material powder. Under the condition that the three-dimensional model is provided with an inclined plane, the inclined plane area can be penetrated by energy, so that material powder is transitionally fused and stuck on the inclined plane, and the inclined plane is rough and cannot meet design requirements.
Disclosure of Invention
In view of the above situation, the present application provides a molding method of a three-dimensional model and a three-dimensional molding apparatus using the same, by dividing a molding layer into areas and changing the power of laser during a laser scanning process, so as to reduce energy injection into a second molding area, avoid excessive melting of material powder, thereby improving the side processing precision and surface roughness of the three-dimensional model, and effectively reducing the number of molding supports of the three-dimensional model, thereby reducing the cost.
The embodiment of the application provides a method for forming a three-dimensional model, which comprises the following steps:
importing a three-dimensional model into an XYZ coordinate system, and slicing the three-dimensional model to obtain forming layer parameters of the three-dimensional model;
paving material powder according to the molding layer parameters;
identifying a first molding zone and a second molding zone of the molding layer, the second molding zone being a side region of the molding layer;
the forming laser moves reciprocally in the first forming area and the second forming area according to a preset path to form the forming layer by melting material powder, the forming laser scans the first forming area with a first power, the forming laser scans the second forming area with a second power, and the first power is larger than the second power.
In some embodiments, the step of identifying a first molding zone and a second molding zone of the molding layer further comprises:
calculating a side inclination angle alpha of the three-dimensional model according to boundary site coordinates of an nth molding layer and an n+1th molding layer and the thickness t of the molding layer;
judging whether the inclination angle alpha is smaller than or equal to a preset value, and if the inclination angle alpha is smaller than or equal to the preset value, dividing the molding layer into a first molding area and a second molding area;
dividing and identifying the first molding zone and the second molding zone according to a preset distance.
In some embodiments, the predetermined distance is 0.1-2 millimeters and the shaping layer thickness is 20-150 micrometers.
In some embodiments, the step of reciprocally moving the shaping laser in the first shaping zone and the second shaping zone according to a predetermined path further comprises:
the shaping laser scans the first shaping region at a first rate and the shaping laser scans the second shaping region at a second rate, the first rate being less than the second rate.
In some embodiments, the first rate is 600-2000mm/s and the second rate is 1000-4000mm/s.
In some embodiments, the step of reciprocally moving the shaping laser in the first shaping zone and the second shaping zone according to a predetermined path further comprises:
identifying the serial number of the molding layer;
the shaping laser scans the second shaping region of the different shaping layer at intervals.
In some embodiments, the step of scanning the second molding zone of a different molding layer at intervals further comprises:
the shaping laser scans the second shaped region of the nth and n+3 shaping layers, and the second shaped region of the n+1 and n+2 shaping layers is not scanned.
In some embodiments, the shaping laser scans the second shaping region of the nth and n+3 th shaping layers at least twice.
In some embodiments, the first power is 100-500W and the second power is 100-200W.
The embodiment of the application also provides three-dimensional forming equipment, which is used for applying the forming method of the three-dimensional model in the embodiment. The three-dimensional forming equipment comprises a controller, a laser, a powder spreading device and a forming platform, wherein the controller is electrically connected with the laser and the powder spreading device. The controller is configured to receive modeling layer parameters of the three-dimensional model and identify a first modeling zone and a second modeling zone of the modeling layer. The powder paving device is used for paving material powder to the forming platform according to the instruction of the controller, and the laser is used for emitting forming laser and adjusting parameters of the forming laser according to the instruction of the controller and controlling the forming laser to reciprocate in the first forming area and the second forming area according to a preset path.
According to the forming method of the three-dimensional model, the forming layer is divided into the areas, the laser power is changed in the laser scanning process, so that energy injection into the second forming area is reduced, excessive melting of material powder is avoided, the side surface machining precision and the surface roughness of the three-dimensional model are improved, the forming support quantity of the three-dimensional model can be effectively reduced, and cost is further reduced.
Drawings
FIG. 1 is a flow chart of a method of forming a three-dimensional model in one embodiment.
FIG. 2 is a schematic cross-sectional structure of a three-dimensional model in one embodiment.
FIG. 3 is a schematic cross-sectional structure of a three-dimensional model in one embodiment.
Fig. 4 is a schematic diagram of the structure of the three-dimensional shaping apparatus in an embodiment.
Description of main reference numerals:
| three-dimensional model | 100 |
| Shaping layer | 10 |
| A first forming zone | 11 |
| Second forming zone | 12 |
| Three-dimensional forming equipment | 200 |
| Controller for controlling a power supply | 201 |
| Laser device | 202 |
| Powder spreading device | 203 |
| Forming platform | 204 |
The specific embodiment is as follows:
the following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.
Referring to fig. 1, 2 and 3, in one embodiment, the method for forming the three-dimensional model 100 includes the following steps:
step S1, importing a three-dimensional model 100 to an XYZ coordinate system, and slicing the three-dimensional model 100 to obtain parameters of a molding layer 10 of the three-dimensional model 100.
Specifically, the molding layers 10 of the three-dimensional model 100 are stacked layer by layer along the Z-axis direction, so that the three-dimensional molding process can be performed layer by layer from bottom to top. Parameters of the shaping layer 10 include, but are not limited to, coordinate parameters, material parameters, and the like.
And S2, paving material powder according to the parameters of the forming layer 10.
In particular, the thickness and shape of the laid material powder matches the thickness and shape of the corresponding shaping layer 10.
In step S3, a first molding zone 11 and a second molding zone 12 of the molding layer 10 are identified, said second molding zone being a lateral region of the molding layer.
Specifically, as shown in fig. 2 and 3, the side inclination angle α of the three-dimensional model 100 is calculated according to the x-coordinate of the boundary points of the nth molding layer 10 and the n+1th molding layer 10 and the thickness t of the molding layer 10, and the calculation formula is:
x1 is the x coordinate of the boundary site of the nth modeling layer.
x2 is the x coordinate of the boundary point of the n+1th molding layer on the same side in the same section.
t is the thickness of the shaping layer 10 and has a value in the range of 20-150 microns.
If the calculated value of the inclination angle α is smaller than or equal to a preset value, it is determined that the side of the three-dimensional model 100 is an inclined surface, and the molding layer 10 needs to be divided into a first molding region 11 and a second molding region 12. If the calculated value of the inclination angle α is greater than the preset value, the molding layer 10 is entirely set as the first molding zone 11. The value range of the preset value is 40-60 degrees.
After the inclination angle α is determined, the first molding region 11 and the second molding region 12 of the molding layer 10 are divided and identified according to a predetermined distance.
Specifically, the inclined plane boundary of the three-dimensional model 100 is taken as a starting position, and is displaced towards the main body area of the three-dimensional model 100 along the X-axis or the Z-axis by a preset distance L to form a virtual interface, wherein one side of the virtual interface, which is close to the outer surface of the three-dimensional model 100, is the inclined plane area of the three-dimensional model 100, and the other side is the main body area of the three-dimensional model 100. Each molding layer 10 is correspondingly divided into a first molding zone 11 and a second molding zone 12 of the molding layer 10 according to the position of the virtual interface. The second molding zone 12 of the plurality of molding layers 10 is stacked to form a beveled region of the three-dimensional model 100. In the XZ section of the three-dimensional model 100, if the oblique side edge of the three-dimensional model 100 is identified as being adjacent to the bottom edge, the displacement is performed along the X-axis by a preset distance L. If the distance between the inclined side and the bottom of the three-dimensional model 100 is identified, the displacement along the Z axis is preset by a distance L, and the area of the virtual interface is the same as the area of the inclined surface of the three-dimensional model 100. The preset distance is 0.1-2 mm.
In step S4, the molding laser reciprocates in the first molding area 11 and the second molding area 12 according to a preset path and with different scanning strategies, so as to form the molding layer 10 from the melted material powder.
Specifically, in each single line scan, the first molding zone 11 is scanned at a first power while the molding laser is moved to the first molding zone 11, and the second molding zone 12 is scanned at a second power while the molding laser is moved to the second molding zone 12. The first power is greater than the second power, so as to reduce the energy received by the material powder in the second molding zone 12, reduce the problem of excessive melting of the powder, reduce the roughness of the inclined surface, and improve the molding accuracy of the three-dimensional model 100. Further, the accuracy of the inclined surface of the three-dimensional model 100 is improved, which is beneficial to improving the use condition of the supporting material in the forming process of the three-dimensional model 100. For example, in the traditional mode, the supporting material is needed when the inclined plane angle is 60 degrees, and by adopting the forming method, the precision requirement can be met without using the supporting material when the inclined plane angle is 60 degrees, so that the forming supporting quantity is reduced, and the production cost is saved.
In the embodiment of the application, the first power is 100-500W, and the second power is 100-200W.
In an embodiment, the molding laser further scans the first molding zone 11 at a first rate, and the molding laser scans the second molding zone 12 at a second rate, the first rate being less than the second rate, so as to further reduce the energy received by the material powder in the second molding zone 12 and improve the surface accuracy of the inclined surface of the three-dimensional model 100. The first speed is 600-2000mm/s, and the second speed is 1000-4000mm/s.
According to the forming method, the power and/or scanning rate of the forming laser are/is switched in the laser reciprocating movement process, so that the energy received by the material powder in different areas is adjusted, and the purpose of improving the surface accuracy of the three-dimensional model 100 is achieved. The molding method does not perform partition scanning on the first molding area 11 and the second molding area 12, that is, when the molding laser moves from the first molding area 11 to the second molding area 12 or moves from the second molding area 12 to the first molding area 11, the laser is continuous, and the second molding area 12 is scanned by different lasers instead of scanning all the first molding area 11 first, so that the molding efficiency of the three-dimensional model 100 is improved, and cracks in the three-dimensional model 100 due to poor laser connection are reduced.
In one embodiment, the step of reciprocating the molding laser in the first molding zone 11 and the second molding zone 12 according to a predetermined path further includes: the number of the molding layer 10 is identified, and the molding laser scans the second molding region 12 of the different molding layer 10 at intervals to reduce the problem of laser penetration at the inclined surface of the three-dimensional model 100.
Specifically, the molding laser scans the second molding region 12 of the nth and n+3 th molding layers 10, and the second molding region 12 of the n+1 th and n+2 th molding layers 10 is not scanned, and the first molding region 11 of each molding layer 10 is scanned in accordance with a preset path.
Further, the molding laser scans the second molding region 12 of the nth and n+3 molding layers at least twice to melt the multi-layer material powder, thereby reducing voids generated in the second molding region 12 and improving the molding quality of the three-dimensional model 100.
The molding method of the three-dimensional model 100 divides the molding layer 10 into areas, and changes the power of laser in the laser scanning process, so as to reduce the energy injection into the second molding area 12, avoid excessive melting of material powder, and improve the processing precision of the inclined surface of the three-dimensional model 100.
Referring to fig. 4, an embodiment of the present application further provides a three-dimensional molding apparatus 200 for applying the molding method of the three-dimensional model described in the above embodiment to manufacture the three-dimensional model 100.
The three-dimensional forming device 200 comprises a controller 201, a laser 202, a powder spreading device 203 and a forming platform 204. The controller 201 is electrically connected to the laser 202, the powder spreading device 203 and the forming stage 204. The controller 201 is configured to receive molding parameters of the three-dimensional model 100 and identify the first molding zone 11 and the second molding zone 12 of the molding layer 10, and correspondingly control the laser 202 and the powder spreading device 203 according to the molding parameters. The powder spreading device 203 is used for spreading material powder to the forming platform according to the instruction of the controller 201. The laser 202 is configured to emit molding laser light and adjust parameters of the molding laser light according to an instruction of the controller 201, and control the molding laser light to reciprocate in the first molding region 11 and the second molding region 12 according to a preset path. The molding platform 204 is used for carrying the three-dimensional model 100 and moves up and down according to the instruction of the controller 201.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.
Claims (9)
1. A method for forming a three-dimensional model, comprising the steps of:
importing a three-dimensional model into an XYZ coordinate system, and slicing the three-dimensional model to obtain forming layer parameters of the three-dimensional model;
paving material powder according to the molding layer parameters;
in an XZ section of the three-dimensional model, calculating a side inclination angle alpha of the three-dimensional model according to X coordinates of boundary sites of an nth molding layer and an n+1th molding layer and the thickness t of the molding layer; the calculation formula is as follows:
wherein X1 is the X coordinate of the boundary site of the nth molding layer; x2 is the X coordinate of the boundary site of the n+1th molding layer on the same side in the same section;
judging whether the inclination angle alpha is smaller than or equal to a preset value, if the inclination angle alpha is smaller than or equal to the preset value, judging that the side edge of the three-dimensional model is an inclined surface, wherein the forming layer is required to be divided into a first forming area and a second forming area;
taking the inclined plane boundary of the three-dimensional model as a starting position, shifting a preset distance along an X axis or a Z axis towards the main body area of the three-dimensional model to form a virtual interface, and correspondingly dividing a first molding area and a second molding area by the molding layer according to the position of the virtual interface; the area of the forming layer on one side of the virtual interface, which is close to the inclined surface, is the second forming area, and the area of the forming layer on the other side of the virtual interface is the first forming area;
the forming laser moves reciprocally in the first forming area and the second forming area according to a preset path to form the forming layer by melting material powder, the forming laser scans the first forming area with a first power, the forming laser scans the second forming area with a second power, and the first power is larger than the second power.
2. The method of claim 1, wherein the predetermined distance is 0.1-2 mm and the thickness of the molding layer is 20-150 μm.
3. The method of forming a three-dimensional model of claim 1, wherein the step of reciprocally moving the forming laser in the first forming zone and the second forming zone according to a predetermined path further comprises:
the shaping laser scans the first shaping region at a first rate and the shaping laser scans the second shaping region at a second rate, the first rate being less than the second rate.
4. A method of forming a three-dimensional model as claimed in claim 3, wherein the first rate is 600-2000mm/s and the second rate is 1000-4000mm/s.
5. The method of forming a three-dimensional model of claim 1, wherein the step of reciprocally moving the forming laser in the first forming zone and the second forming zone according to a predetermined path further comprises:
identifying the serial number of the molding layer;
the shaping laser scans the second shaping region of the different shaping layer at intervals.
6. The method of forming a three-dimensional model of claim 5, wherein the step of scanning the second forming region of the different forming layer at intervals further comprises:
the shaping laser scans the second shaped region of the nth and n+3 shaping layers, and the second shaped region of the n+1 and n+2 shaping layers is not scanned.
7. The method of claim 6, wherein the shaping laser scans the second shaping region of the nth and n+3 shaping layers at least twice.
8. The method of claim 1, wherein the first power is 100-500W and the second power is 100-200W.
9. A three-dimensional modeling apparatus for applying the modeling method of the three-dimensional model of any one of claims 1 to 8, characterized in that the three-dimensional modeling apparatus includes a controller, a laser, a powder spreading device, and a modeling platform, the controller being electrically connected to the laser and the powder spreading device, the controller being configured to receive modeling layer parameters of the three-dimensional model and identify a first modeling zone and a second modeling zone of the modeling layer; the powder paving device is used for paving material powder to the forming platform according to the instruction of the controller, and the laser is used for emitting forming laser and adjusting parameters of the forming laser according to the instruction of the controller and controlling the forming laser to reciprocate in the first forming area and the second forming area according to a preset path.
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| CN105665704A (en) * | 2016-03-11 | 2016-06-15 | 上海拓宝机电科技有限公司 | Metal laser selective melting method |
| CN109622955A (en) * | 2018-11-26 | 2019-04-16 | 南京航空航天大学 | A kind of dual-beam precinct laser fusion increasing material manufacturing method |
| CN110560688A (en) * | 2019-09-23 | 2019-12-13 | 华中科技大学 | Additive manufacturing method |
| CN112059186A (en) * | 2020-11-11 | 2020-12-11 | 中国航发上海商用航空发动机制造有限责任公司 | Molded article with inclined surface and molding method thereof |
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