CN116690991A - Method for dynamically regulating and controlling 3D printing extrusion flow in real time - Google Patents
Method for dynamically regulating and controlling 3D printing extrusion flow in real time Download PDFInfo
- Publication number
- CN116690991A CN116690991A CN202310571467.0A CN202310571467A CN116690991A CN 116690991 A CN116690991 A CN 116690991A CN 202310571467 A CN202310571467 A CN 202310571467A CN 116690991 A CN116690991 A CN 116690991A
- Authority
- CN
- China
- Prior art keywords
- wire
- printing
- extrusion flow
- real time
- cross
- 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
- 238000010146 3D printing Methods 0.000 title claims abstract description 36
- 238000001125 extrusion Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000001276 controlling effect Effects 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
Classifications
-
- 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
-
- 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
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a method for dynamically regulating and controlling 3D printing extrusion flow in real time, which comprises the following steps: step one, acquiring three-dimensional coordinate data of wires at a wire feeder inside a 3D printer by adopting a three-dimensional laser scanner; step two, the software processes the three-dimensional coordinate data collected and calculates the cross-sectional area of the wire; step three, dynamically adjusting the rotation speed of a wire feeding gear in real time according to the change of the cross section area of the wire at the position in the 3D printing wire feeding process, namely the extrusion flow of the wire in 3D printing; and step four, realizing more uniform and stable volume of the material extruded by the 3D printing nozzle through real-time dynamic change of extrusion flow. The invention solves the problems of poor surface quality, more internal pores and uneven size of the formed sample piece caused by larger error of the wire diameter under the traditional 3D printing fixed extrusion flow, and greatly improves the forming quality and mechanical property of the 3D printing product.
Description
Technical Field
The invention belongs to the field of 3D printing (additive manufacturing), and particularly relates to a method for dynamically regulating and controlling 3D printing extrusion flow in real time.
Background
The 3D printing realizes the forming of the composite material component through the automatic and digital layer-by-layer accumulation of the material from bottom to top, and the technology has the advantages of high material utilization rate, structural design and manufacturing integration, no need of a die and the like, and can realize the integration of composite material preparation and component forming manufacturing. The 3D printing technology based on the fused deposition principle is widely applied due to the advantages of low cost, simple operation and the like. Currently, the traditional 3D printing main process includes three-dimensional modeling, parameter slicing, 3D printer wire importing, slice file importing starting and printing completion. The preparation sample generally adopts fixed printing parameters, but the whole diameter of the preparation sample cannot be guaranteed to be uniform and stable when the wire is prepared, so that in the wire feeding process, when the actual diameter of the wire is larger than the theoretical diameter, the surface quality of the printing sample is rough, and when the actual diameter of the wire is smaller than the theoretical diameter, the internal pores of the printing sample are increased, defects are increased, and the mechanical property is further influenced. Therefore, the development of a method for dynamically regulating and controlling the 3D printing extrusion flow in real time is urgent.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for dynamically regulating and controlling 3D printing extrusion flow in real time, which comprises the following steps:
step one, acquiring three-dimensional coordinate data of wires at a wire feeder inside a 3D printer by adopting a three-dimensional laser scanner;
step two, the software processes the three-dimensional coordinate data collected and calculates the cross-sectional area of the wire;
step three, according to the change of the cross-sectional area of the wire material at the position in the 3D printing wire feeding process,dynamically adjusting the rotation speed of the wire feeding gear in real time, namely, extruding the wire material flow of 3D printing; according to the formula v=s×2pi nr, where V is the volume of the extruded material (mm 3 ) S is the collection and calculation of the cross-sectional area (mm) of the wire 2 ) N is the rotating speed (r/s) of the extruder, and r is the radius (mm) of a wire feeding gear connected with the extruder, so that the volume of extruded materials in unit time is kept constant, and when the cross section area of the wire changes, the rotating speed of the extruder needs to be correspondingly changed reversely;
and step four, realizing more uniform and stable volume of the material extruded by the 3D printing nozzle through real-time dynamic change of extrusion flow.
It is further preferred that the composition,
and acquiring and recording information such as three-dimensional coordinates, reflectivity, textures and the like of a large number of dense points on the surface of the wire at the wire feeding device in the 3D printer by adopting a three-dimensional laser scanner.
It is further preferred that the composition,
the recorded information is imported into corresponding software to calculate the actual cross-sectional area of the wire at the position, and the diameters of the adopted pure resin wire and the short fiber reinforced resin-based wire are generally about 1.75 mm.
It is further preferred that the composition,
the control system of the 3D printer is used for guiding the information such as the cross sectional area of the wire material into the control system, and dynamically adjusting the rotation speed of the wire feeding gear in real time, so that the length of the wire material fed into the nozzle in unit time is changed, namely the extrusion flow of the wire material, and the general flow is set to be about 100%.
It is further preferred that the composition,
the product of the cross-sectional area and the length of the wire in unit time represents the volume of the wire in the unit time, so that the extrusion volume of the wire in each unit time is basically constant, namely, the length is correspondingly reversely changed when the cross-sectional area is changed in the unit time.
It is further preferred that the composition,
the filaments include various pure resin filaments or short fiber reinforced resin based filaments.
Compared with the prior art, the invention has the beneficial effects that:
the method has the advantages that the real-time dynamic regulation and control of the extrusion flow of the nozzle in the 3D printing process is realized, the theoretical model sample piece of the three-dimensional modeling is formed more accurately, the problems of forming quality and uneven surface are solved, meanwhile, the porosity and the pore size can be reduced as much as possible, the forming quality and the mechanical property of the 3D printing sample piece are comprehensively improved, and the economic value and the development potential of the 3D printing sample piece are improved.
Drawings
Fig. 1 is a schematic diagram of a method for dynamically controlling 3D printing extrusion flow in real time.
FIG. 2 is a schematic view of the variation of the cross-sectional area of the filament versus the surface quality of a 3D print sample; the cross-sectional area of the wire is smaller, obvious pores appear, the cross-sectional area of the wire is larger, obvious material overflow appears, and the proper extrusion flow is regulated, so that the surface quality is better.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in fig. 1, the method for dynamically regulating and controlling the extrusion flow of 3D printing in real time in this embodiment includes the following steps:
step one, acquiring and recording information such as three-dimensional coordinates, reflectivity, textures and the like of a large number of dense points on the surface of a wire at a wire feeding device in a 3D printer by adopting a three-dimensional laser scanner.
Step two, the software processes the three-dimensional coordinate data collected and calculates the cross-sectional area of the wire; the recorded information is imported into corresponding software to calculate the actual cross-sectional area of the wire at the position, and the diameter of the short carbon fiber reinforced polyether-ether-ketone-based wire basically fluctuates within the range of 1.60-1.75 mm.
And thirdly, leading the information such as the cross sectional area of the wire into a control system of the 3D printer, dynamically adjusting the rotation speed of the wire feeding gear in real time, and realizing the change of the length of the wire fed into the nozzle in unit time, namely the extrusion flow of the wire, which is basically 100+/-10%. According to the change of the cross section area of the wire in the position in the 3D printing wire feeding process, the rotation speed of the wire feeding gear, namely the wire extrusion flow of the 3D printing, is dynamically adjusted in real time;
according to the formula v=s×2pi nr, where V is the volume of the extruded material (mm 3 ) S is the collection and calculation of the cross-sectional area (mm) of the wire 2 ) N is the rotation speed (r/s) of the extruder, and r is the radius (mm) of a wire feeding gear connected with the extruder, so that the volume of extruded materials in unit time is kept constant, and when the cross-sectional area of the wires changes, the rotation speed of the extruder needs to be correspondingly changed reversely.
Specific examples are as follows: according to the default setting of the 3D printer, the extrusion flow rate is 100%, and the radius r of the wire feeding gear installed by the equipment is 5mm. If the printing speed v1 is set to 30mm/s in the slicing parameters, the extruder rotation speed n1 is about 0.955 (r/s) according to the formula v=2pi nr. When the diameter of the wire is 1.75mm, the cross-sectional area of the wire is about 2.4mm 2 Then the volume V of the extruded material is about 72mm within 1s 3 The method comprises the steps of carrying out a first treatment on the surface of the If at some point in time the wire diameter becomes smaller by 1.7mm, then a cross-sectional area of 2.3mm is collected and calculated 2 Thus, to achieve a volume of extruded material still of 72mm within 1s 3 It is necessary to accelerate the extruder speed n, which is obtained according to the formula v=s×2pi nr, and the extruder speed n2 is 0.996 (r/S), and the extrusion flow rate is correspondingly changed to 104.3%.
And step four, realizing more uniform and stable volume of the material extruded by the 3D printing nozzle through real-time dynamic change of extrusion flow.
The product of the cross section area and the length of the wire in unit time represents the volume of the wire in the unit time, so that the extrusion volume of the wire in each unit time is basically constant, namely, when the diameter of the wire is reduced, the rotation speed of the wire feeding gear is correspondingly increased; when the wire diameter becomes larger, the rotational speed of the wire feed gear decreases accordingly.
As shown in fig. 2, the effect of the change in the cross-sectional area of the wire on the surface quality of the 3D printing sample piece is that (a) when the cross-sectional area of the wire is smaller, obvious pores appear; (b) when the size is larger, obvious material overflow occurs; (c) adjusting proper extrusion flow, and the surface quality is better. The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
Claims (6)
1. A method for dynamically regulating and controlling 3D printing extrusion flow in real time is characterized in that,
the method comprises the following steps:
step one, acquiring three-dimensional coordinate data of wires at a wire feeder inside a 3D printer by adopting a three-dimensional laser scanner;
step two, the calculation software processes the collected three-dimensional coordinate data and calculates the cross-sectional area of the wire at the position;
step three, dynamically adjusting the rotation speed of a wire feeding gear in real time according to the change of the cross section area of the wire at the position in the 3D printing wire feeding process, namely the extrusion flow of the wire in 3D printing;
according to the formula v=s×2pi nr, where V is the volume of the extruded material (mm 3 ) S is the collection and calculation of the cross-sectional area (mm) of the wire 2 ) N is the rotating speed (r/s) of the extruder, and r is the radius (mm) of a wire feeding gear connected with the extruder, so that the volume of extruded materials in unit time is kept constant, and when the cross section area of the wire changes, the rotating speed of the extruder needs to be correspondingly changed reversely;
and step four, realizing more uniform and stable volume of the material extruded by the 3D printing nozzle through real-time dynamic change of extrusion flow.
2. The method for dynamically regulating and controlling 3D printing extrusion flow in real time according to claim 1, wherein the method comprises the following steps: three-dimensional coordinates, reflectivity and texture information of a large number of dense points on the surface of a wire at a wire feeding device inside a 3D printer are acquired and recorded by a three-dimensional laser scanner.
3. The method for dynamically regulating and controlling 3D printing extrusion flow in real time according to claim 1, wherein the method comprises the following steps: the recorded information is imported into corresponding software to calculate the actual cross-sectional area of the wire at the position.
4. The method for dynamically regulating and controlling 3D printing extrusion flow in real time according to claim 1, wherein the method comprises the following steps: the cross-sectional area information of the wire is led into a control system of the 3D printer, the rotation speed of the wire feeding gear is dynamically adjusted in real time, and the length of the wire fed into the nozzle in unit time is changed, namely the extrusion flow of the wire is realized.
5. The method for dynamically regulating and controlling 3D printing extrusion flow in real time according to claim 1, wherein the method comprises the following steps: the product of the cross-sectional area and the length of the wire in unit time represents the volume of the wire in the unit time, so that the extrusion volume of the wire in each unit time is basically constant.
6. The method for dynamically regulating and controlling 3D printing extrusion flow in real time according to claim 1, wherein the method comprises the following steps: the filaments include pure resin filaments or short fiber reinforced resin based filaments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571467.0A CN116690991A (en) | 2023-05-20 | 2023-05-20 | Method for dynamically regulating and controlling 3D printing extrusion flow in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571467.0A CN116690991A (en) | 2023-05-20 | 2023-05-20 | Method for dynamically regulating and controlling 3D printing extrusion flow in real time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116690991A true CN116690991A (en) | 2023-09-05 |
Family
ID=87833098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310571467.0A Pending CN116690991A (en) | 2023-05-20 | 2023-05-20 | Method for dynamically regulating and controlling 3D printing extrusion flow in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116690991A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106660267A (en) * | 2014-06-12 | 2017-05-10 | 兰姆布斯国际科技有限公司 | Extruder for fused filament fabrication 3D printer |
| CN109476085A (en) * | 2016-07-12 | 2019-03-15 | 微软技术许可有限责任公司 | Generate the dimensional accuracy in 3D object |
| CN113591350A (en) * | 2021-07-26 | 2021-11-02 | 南京理工大学 | Method for improving 3D printing forming quality of material extrusion forming |
-
2023
- 2023-05-20 CN CN202310571467.0A patent/CN116690991A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106660267A (en) * | 2014-06-12 | 2017-05-10 | 兰姆布斯国际科技有限公司 | Extruder for fused filament fabrication 3D printer |
| CN109476085A (en) * | 2016-07-12 | 2019-03-15 | 微软技术许可有限责任公司 | Generate the dimensional accuracy in 3D object |
| CN113591350A (en) * | 2021-07-26 | 2021-11-02 | 南京理工大学 | Method for improving 3D printing forming quality of material extrusion forming |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203485449U (en) | Wire feeding device of 3D (Three-Dimensional) printing machine applied to FDM (Frequency Division Multiplexing) forming technique | |
| US10744709B2 (en) | Methods and apparatus for compressing material during additive manufacturing | |
| CN100558961C (en) | High accuracy moulding silk | |
| CN110756805B (en) | 3D printing device for laser selective solidification metal and application method thereof | |
| EP2523799B1 (en) | Method for generating and building support structures with deposition-based digital manufacturing systems | |
| CN105058789A (en) | 3D printing device suitable for multi-material workpieces | |
| CN105729814A (en) | Material discharging control system of novel FDM printer | |
| CN109501272A (en) | A kind of layered approach and its increasing material manufacturing method for feature structure of dangling in increasing material manufacturing | |
| CN109759586B (en) | Unsupported layered slicing method for internal channel structure | |
| JPWO2008108151A1 (en) | Clay mill | |
| CN108262950B (en) | Printing method for preventing blanking during movement of FDM printing head in non-printing state | |
| CN116690991A (en) | Method for dynamically regulating and controlling 3D printing extrusion flow in real time | |
| CN103213280B (en) | Intelligent rapid formation flow control method based on line width measurement | |
| DE112018008001B4 (en) | 3D printing device and numerical control device | |
| CN210305092U (en) | Copper continuous extrusion device | |
| CN204019945U (en) | A kind of extrusion device of plastic plate | |
| CN111070668B (en) | Method for preparing pore-diameter-controllable nano porous structure workpiece by fused deposition molding technology | |
| CN112024887A (en) | Method and system for optimizing printing of ceramic isolation layer | |
| EP0687365B1 (en) | A secondary coating line | |
| US9044797B2 (en) | Device for producing a circularly cylindrical body | |
| CN215849543U (en) | Automatic size control extruder for plastic brace | |
| CN202084348U (en) | Multi-core ATA wire extruding device | |
| CN202106568U (en) | Device for continuous producing rod being infinite in length and having multiple inner spiral cooling holes | |
| CN204488021U (en) | With the single screw extrusion machine of different hole shape porous plate | |
| CN109774118B (en) | Method for enhancing mechanical property of FDM3D printing part |
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 |