CN114643714B - Photo-curing 3D printing method, electronic device and storage medium - Google Patents
Photo-curing 3D printing method, electronic device and storage medium Download PDFInfo
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- CN114643714B CN114643714B CN202011510341.5A CN202011510341A CN114643714B CN 114643714 B CN114643714 B CN 114643714B CN 202011510341 A CN202011510341 A CN 202011510341A CN 114643714 B CN114643714 B CN 114643714B
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- 238000003860 storage Methods 0.000 title claims abstract description 41
- 238000010146 3D printing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000000016 photochemical curing Methods 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 238000007639 printing Methods 0.000 claims abstract description 87
- 239000011347 resin Substances 0.000 claims abstract description 80
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 239000007787 solid Substances 0.000 claims description 52
- 238000000465 moulding Methods 0.000 claims description 7
- 238000007645 offset printing Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification 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
- B29C64/30—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
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
-
- 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
- B29C64/227—Driving means
-
- 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
- B29C64/245—Platforms or substrates
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1253—Configuration of print job parameters, e.g. using UI at the client
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- Manufacturing & Machinery (AREA)
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- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
Abstract
A photo-curing 3D printing method comprising the steps of: forming a layered slice image of a pre-printing model, and sending the layered slice image to a display screen to display the slice image, wherein the display screen is positioned between a light source and a liquid storage tank, and the liquid storage tank is accommodated with liquid photosensitive resin and a forming platform for bearing the printing model; determining whether the entity part of the current slice is covered with the non-entity part of the previous slice according to the pre-printing model; when the entity part of the current slice is covered with the non-entity part of the previous slice, adjusting the parameter value of the printing parameter according to the preset compensation printing rule; and controlling the light projected onto the photosensitive resin according to the adjusted parameter value, so that the light projected onto the photosensitive resin is solidified to form a printing layer positioned outside the last slice. The invention also provides an electronic device and a storage medium for executing the photo-curing 3D printing method.
Description
Technical Field
The present invention relates to 3D printing systems and 3D printing methods, and more particularly, to a photo-curing 3D printing method, an electronic device, and a storage medium.
Background
The three-dimensional photo-curing forming process is a three-dimensional printing technology widely applied in modern technology, and a raw material photosensitive resin is scanned according to the contour track of a slice layer slice of a workpiece to be processed under the projection of a light source to generate photopolymerization, so that a plurality of thin slices which are stacked layer by layer are formed, and a complete workpiece model is obtained. When the light-sensitive resin is projected and solidified by a light source, expansion and expansion are generated, and in the process of printing a model, when the entity position printed by the next thin slice is covered at the hollow position of the last thin slice, the entity on the next thin slice can expand to the hollow position of the last thin slice, so that a larger or smaller bulge is formed at the hollow position of the last thin slice, and the quality of manufacturing the model is influenced.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a photo-curing printing method, an electronic device and a storage medium for improving the quality of a fabricated model.
A photo-curing 3D printing method comprising the steps of:
Controlling a display screen to form a slice of image of the pre-printing model, wherein the display screen is positioned between a light source and a liquid storage tank, and the liquid storage tank is accommodated with liquid photosensitive resin and a forming platform for bearing the printing model;
Determining whether the entity part of the current slice is covered with the non-entity part of the previous slice according to the pre-printing model;
When the entity part of the current slice is covered with the non-entity part of the previous slice, adjusting the parameter value of the printing parameter according to the preset compensation printing rule; and
And controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value, so that the light projected onto the liquid photosensitive resin solidifies the liquid photosensitive resin to form a printing layer positioned outside the last slice.
Further, the preset compensation printing rule is: and printing the part of the current slice covering the non-solid part of the previous slice by adopting the preset proportion of the original printing parameter value, wherein the preset proportion is smaller than 1.
Further, the preset compensation printing rule is: and when the part of the next slice corresponding to the non-solid part of the previous slice is solid, not printing the part of the current slice covering the non-solid part of the previous slice, and correspondingly, adjusting the parameter value to zero.
Further, the preset compensation printing rule is: the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank is increased according to the distance setting rule, so that light is projected onto part of liquid photosensitive resin between the bottom ends of the forming platform and the liquid storage tank.
Further, the printing parameters include a duration of light projected onto the liquid photosensitive resin, and the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value is: and controlling the duration of the light source projecting the liquid photosensitive resin to be a preset duration according to the adjusted parameter value.
Further, the printing parameters include the intensity of the light projected onto the liquid photosensitive resin, and the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value is: and according to the adjusted parameter value, the gray value of the part, corresponding to the non-solid part of the previous slice, of the image of the current slice is increased, so that the intensity of the part of the image transmitted by light is reduced to the preset intensity.
Further, when the printing parameter is the distance between the bottom end of the molding platform and the bottom end of the liquid storage tank, the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value is as follows: according to the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank after adjustment, light is projected to part of liquid resin between the bottom end of the forming platform and the bottom end of the liquid storage tank so as to solidify the part of liquid resin.
Further, the photo-curing 3D printing method further includes the steps of:
When the solid part included in the current slice does not cover the part above the previous slice, controlling the light projected onto the liquid photosensitive resin according to the original parameter value, so that the light projected onto the photosensitive resin solidifies the liquid photosensitive resin to form a printing layer corresponding to the current slice.
Further, the photo-curing 3D printing method further includes the steps of:
Judging whether all slices of the pre-printing model are printed; and
When all the slices of the preprinted model are not printed, controlling a platform driving device connected with the forming platform to move, so that the platform driving device drives the forming platform to move for a preset distance according to a preset direction.
Further, the non-solid portion of the previous slice is outside the hole or notch or edge.
An electronic device comprises a processor and a memory, wherein a plurality of program modules are stored in the memory, and the program modules are loaded by the processor and execute the photo-curing 3D printing method.
A storage medium having stored thereon at least one computer instruction loaded by a processor to perform the photo-curing 3D printing method described above.
According to the photocuring 3D printing method, the electronic device and the storage medium, when the entity part of the current slice is covered with the non-entity part of the previous slice, the printing of the current slice is carried out according to the adjusted parameter value, the current slice is automatically filled by utilizing the self-expansion performance of the liquid photosensitive resin after being cured, the current slice cannot overflow to the non-entity part of the previous slice, the generation of bulges at the non-entity part of the previous slice is avoided, and the quality of the printed 3D model is improved.
Drawings
Fig. 1 is a flowchart of a photo-curing 3D printing method.
FIG. 2 is a schematic diagram of a pre-print model printing in one embodiment.
Fig. 3 is a slice view of the preprinted model of fig. 2 after printing.
Fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.
Fig. 5 is a schematic block diagram of a photo-curing 3D printing system provided by the present invention.
Description of the main reference signs
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a photo-curing 3D printing method provided by the invention is provided, wherein the photo-curing 3D printing method is used for printing a 3D model and comprises the following steps:
Step S11: and forming a layered slice image of the pre-printed model, and sending the layered slice image to a display screen for displaying the slice image, wherein the display screen is positioned between a light source and a liquid storage tank, the liquid storage tank is accommodated with liquid photosensitive resin and a forming platform, and the forming platform is used for bearing the printed model.
Step S12: and determining whether the entity part of the current slice is covered with the non-entity part of the previous slice according to the pre-printing model. The non-solid portion includes an outer side of the hole, notch or edge, etc. When the solid part of the current slice is covered with the non-solid part of the previous slice, the step S13 is entered; when the solid portion of the current slice does not cover the non-solid portion of the previous slice, the process proceeds to step S15.
Step S13: and adjusting parameter values of printing parameters according to a preset compensation printing rule. The printing parameters comprise the duration or intensity of light projected by the liquid photosensitive resin or the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank. The preset compensation printing rule comprises the steps of adjusting the duration of the light projecting the liquid photosensitive resin to a preset duration, adjusting the intensity of the light projecting the liquid photosensitive resin to a preset intensity, or adjusting the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank to a preset distance.
In one embodiment, the preset offset printing rule is: and when the part of the next slice corresponding to the non-solid part of the previous slice is solid, not printing the part of the current slice covering the non-solid part of the previous slice, and correspondingly, adjusting the parameter value to zero. Referring to fig. 2 and 3, in order to illustrate the printing process of the pre-print model 20 and the printed slice diagram, the upper slice 21 of the pre-print model 20 includes the hole 211, the current slice 22 is a full-solid slice, and when the current slice 22 is printed, the first solid portion 221 opposite to the hole 211 is not printed, and only the second solid portions 222 located at both sides of the hole 211 are printed. Since the liquid photosensitive resin is cured, there is an expansion phenomenon, although the first solid portion 221 is not printed, the solid portion of the next slice 23 printed later expands itself to fill the first solid portion 221 of the current slice. Thus, printing of the first solid portion 221 can be achieved, and the first solid portion 221 can be prevented from overflowing into the hole 211 to form a protrusion.
In another embodiment, the preset offset printing rule is: and printing the part of the current slice covering the non-solid part of the previous slice by adopting the preset proportion of the original printing parameter value, wherein the preset proportion is smaller than 1. The original printing parameter value refers to a parameter value for printing when the expansion factor of the cured liquid photosensitive resin is not considered, and the setting of the original printing parameter value is in the prior art and is not described herein. The specific preset proportion can be determined according to the expansion performance of the cured material of the liquid photosensitive resin. If the preset compensation printing rule is that the printing parameter is adjusted to fifty percent of the original parameter value, the duration of the light source for projecting the liquid photosensitive resin is 10 seconds originally, and the duration of the light source for projecting the liquid photosensitive resin is reduced to 5 seconds after adjustment; or the gray value of the part, which is not physically opposite to the previous slice, of the image of the current slice is increased, so that the intensity of the part of the image transmitted by light is reduced to fifty percent of the original intensity. In the foregoing preset offset printing rule, although the portion of the current slice corresponding to the non-solid portion of the previous slice is not fully printed, after the liquid photosensitive resin is cured, there is an expansion phenomenon, and the portion of the current slice corresponding to the non-solid portion of the previous slice can be filled up by expansion. Therefore, printing of the solid part can be realized, and forming of the bulge on the non-solid part of the last slice can be avoided.
In another embodiment, the preset offset printing rule is: the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank is increased according to the distance setting rule, so that light is projected onto part of liquid photosensitive resin between the bottom ends of the forming platform and the liquid storage tank. In one embodiment, the distance setting rule is to adjust the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank to 1.1 times of the original distance. Because the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank is increased, when the light is solidified to the liquid photosensitive resin, the thickness of the liquid photosensitive resin to be projected onto the forming platform is increased, so that the light cannot be projected to the liquid resin near the bottom end of the forming platform, and the current layer slice near the bottom end of the forming platform, which is not projected by the light, is filled up automatically by utilizing the self-expansion performance of the liquid photosensitive resin after solidification, so that the current printing layer is printed completely. Therefore, printing of the solid part can be realized, and forming of the bulge on the non-solid part of the last slice can be avoided.
Step S14: and controlling the light projected onto the photosensitive resin according to the adjusted parameter value, so that the light projected onto the photosensitive resin is solidified to form a printing layer positioned outside the previous slice, wherein the printing layer corresponds to the current slice and is borne on the forming platform.
Specifically, when the printing parameter is a duration of projecting light of the liquid photosensitive resin, step S14 specifically includes: and controlling the duration of the light source for projecting the photosensitive resin to be a preset duration according to the adjusted parameter value. When the printing parameter is the intensity of the light projected onto the liquid photosensitive resin, step S14 specifically includes: and according to the adjusted parameter value, the gray value of the part, corresponding to the non-solid part of the previous slice, of the image of the current slice is increased, so that the intensity of the part of the image transmitted by light is the preset intensity. When the gray value is adjusted to the highest, no light passes through the part of the image, correspondingly, when in printing, no light is projected on the liquid photosensitive resin at the part of the image of the current slice corresponding to the non-solid part of the previous slice, so that the part of the current slice covering the non-solid part of the previous slice is not solidified into a solid, and the part of the current slice covering the non-solid part of the previous slice is not printed. When the printing parameter is the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank, the step S14 specifically comprises: according to the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank after adjustment, light is projected to part of liquid resin between the bottom end of the forming platform and the bottom end of the liquid storage tank so as to solidify the part of liquid resin. When in printing, light only projects to part of liquid resin between the bottom end of the forming platform and the bottom end of the liquid storage tank, but cannot project to the liquid resin close to the bottom end of the forming platform to solidify the part of liquid resin, and the part of the current slice close to the bottom end of the forming platform is automatically filled with the self-expansion performance of the solidified liquid photosensitive resin without expanding to the previous slice. Thus, the printing is not carried out on the part of the current slice covering the non-solid part of the previous slice.
Step S15: and controlling light projected onto the photosensitive resin according to the original parameter value, so that the light projected onto the photosensitive resin is solidified to form a printing layer corresponding to the current slice, and the printing layer is borne on the forming platform.
Step S16: and judging whether all slices of the pre-printing model are printed. When all the slices of the preprinted model are not printed, the process advances to step S17, otherwise the flow ends.
Step S17: and controlling the platform driving device to move, so that the platform driving device drives the forming platform to move for a preset distance according to a preset direction, and jumping to the step S11 to print the next slice of the preprinted model. In one embodiment, the predetermined direction is a direction away from the light source and the predetermined distance is a thickness of the printed slice.
Please refer to fig. 4, which is a schematic diagram illustrating a structure of an electronic device 30 according to the present invention and fig. 5, which is a schematic diagram illustrating a module of a photo-curing 3D printing system 40 according to the present invention.
The electronic device 30 is electrically connected with the display 50, the light source 60 and the platform driving device 70, the platform driving device 70 is connected with the molding platform 80, the molding platform 80 is disposed in the liquid storage tank 90, and the liquid storage tank 90 contains the liquid photosensitive resin 91. The electronic device 30 is configured to send an image generating signal, a light control signal and a driving signal to the display 50, the light source 60 and the platform driving device 70, respectively. The display screen 50 is disposed between the light source 60 and the liquid reservoir 90 for generating an image from the received image generation signal. The light source 60 is configured to project light according to the received light control signal, and the light is projected onto the liquid photosensitive resin 91 through the image, so that the liquid photosensitive resin 91 is cured to form a printing layer, and the printing layer is carried on the molding platform 80. The stage driving device 70 is used for driving the molding stage 80 to move according to the received driving signal so as to print the next printing layer, thereby gradually printing the 3D model.
The electronic device 30 includes, but is not limited to, a processor 31, a memory 32, and a computer program 33. The memory 32 stores a preprinting model, compensating printing rules and the computer program 33. The computer program 33 comprises a code reading program. The processor 31 executes the computer program 33 and implements steps S11 to S17 in the photo-curing 3D printing method shown in fig. 1 when the computer program 33 is executed. Or the processor 31 when executing the computer program 33 performs the functions of the bulk photo-curing 3D printing system 40 shown in fig. 4.
The photo-curing 3D printing system 40 operates in the electronic device 30. The photo-curing 3D printing system 40 may comprise a plurality of functional modules consisting of program code segments. Program code for each program segment in the photo-cured 3D printing system 40 may be stored in the memory 32 of the electronic device 30 and executed by the at least one processor 31 to implement the code reading.
The photo-curing 3D printing system 40 is divided into a plurality of functional modules according to the functions performed by the photo-curing 3D printing system, and the functional modules include a control module 41, an analysis module 42, an adjustment module 43 and a judgment module 44. The module referred to in the present invention refers to a series of computer program 33 segments capable of being executed by at least one processor 31 and of performing a fixed function, which are stored in a memory 32. It will be appreciated that in other embodiments, the modules may be program instructions or firmware (firmware) that are resident in the processor 31.
The control module 41 is configured to send a graphics generation signal to the display 50 according to a slice of the preprinted model, so as to control the display 50 to form an image of the slice.
The analysis module 42 is configured to determine whether the solid portion of the current slice is covered with the non-solid portion of the previous slice according to the preprinted model.
The adjustment module 43 is configured to adjust parameter values of printing parameters according to a preset offset printing rule when the physical portion of the current slice covers the non-physical portion of the previous slice; and when the entity part of the current slice does not cover the non-entity part of the previous slice, maintaining the original parameter value of the printing parameter. In one embodiment, the printing parameters include the duration or intensity of the light striking the liquid photosensitive resin 91 or the distance between the bottom end of the forming table 80 and the bottom end of the reservoir 90. Compensating the printing rules includes adjusting the duration of the light projecting the liquid photosensitive resin 91 to a preset duration or adjusting the intensity of the light projecting the liquid photosensitive resin 91 to a preset intensity or adjusting the distance between the bottom end of the molding table 80 and the bottom end of the liquid tank 90 to a preset distance.
The control module 41 is further configured to send a light control signal to the light source 60 or the display screen 50 according to the adjusted parameter value to control the light projected onto the liquid photosensitive resin 91 when the solid portion of the current slice is covered with the non-solid portion of the previous slice, so that the light projected onto the photosensitive resin cures the photosensitive resin to form a print layer corresponding to the current slice. Specifically, when the printing parameter is a duration of light projecting the liquid photosensitive resin 91, the control module sends a light control signal to the light source 60 to control the duration of light projecting the photosensitive resin by the light source 60 to be a preset value. When the printing parameter is the intensity of the light projected onto the liquid photosensitive resin 91, the control module 41 sends a light control signal to the display screen 50 to raise the gray level of the portion of the image of the current slice corresponding to the non-solid portion of the previous slice, so that the intensity of the light transmitted through the portion of the image is a preset value. When the printing parameter is the distance between the bottom end of the forming platform 80 and the bottom end of the liquid storage tank 90, the control module 41 sends an adjustment signal to the platform driving device 70, so that the platform driving device 70 drives the forming platform 80 to move according to the adjustment signal to adjust the distance between the bottom end of the forming platform 80 and the bottom end of the liquid storage tank 90 to a preset distance.
The judging module 44 is configured to judge whether all slices of the preprinted model are printed.
The control module 41 is further configured to send a driving signal to the stage driving device 70 when all the slices of the pre-print model are not printed, so that the stage driving device 70 drives the forming stage 80 to move a predetermined distance according to the driving signal in a predetermined direction, so as to print a slice of a next layer of the pre-print model. In one embodiment, the predetermined direction is a direction away from the light source 60 and the predetermined distance is a thickness of the printed slice.
According to the photocuring 3D printing method, the electronic device 30 and the storage medium, when the solid part of the current slice is covered with the non-solid part of the previous slice, the current slice is printed according to the adjusted parameter value, the current slice is automatically filled by utilizing the self-expansion performance of the liquid photosensitive resin 91 after curing, the non-solid part of the previous slice is prevented from overflowing, the bulge is prevented from being generated in the non-solid part of the previous slice, and the quality of the printed 3D model is improved.
It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustration only and not for the purpose of limitation, and that the appropriate modifications and variations of the above embodiments are within the scope of the disclosure of the invention as disclosed herein.
Claims (11)
1. A photo-curing 3D printing method comprising the steps of:
forming a layered slice image of a pre-printing model, and sending the layered slice image to a display screen to display the slice image, wherein the display screen is positioned between a light source and a liquid storage tank, and the liquid storage tank is accommodated with liquid photosensitive resin and a forming platform for bearing the printing model;
Determining whether the entity part of the current slice is covered with the non-entity part of the previous slice according to the pre-printing model;
When the entity part of the current slice is covered with the non-entity part of the previous slice, the parameter value of the printing parameter is adjusted according to a preset compensation printing rule, wherein the preset compensation printing rule comprises that the part of the current slice, which covers the non-entity part of the previous slice, is not printed or the part of the current slice, which covers the non-entity part of the previous slice, is printed according to the preset proportion of the parameter value of the original printing parameter, or the preset compensation printing rule is as follows: increasing the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank according to the distance setting rule, so that light is projected onto part of liquid photosensitive resin between the bottom end of the forming platform and the bottom end of the liquid storage tank; and
And controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value, so that the light projected onto the liquid photosensitive resin solidifies the liquid photosensitive resin to form a printing layer which is overlapped on the current slice positioned at one end of the previous slice.
2. The photo-curing 3D printing method of claim 1, wherein the preset offset printing rule is: and printing the part of the current slice covering the non-solid part of the previous slice by adopting the preset proportion of the original printing parameter value, wherein the preset proportion is smaller than 1.
3. The photo-curing 3D printing method of claim 1, wherein the preset offset printing rule is: and when the part of the next slice corresponding to the non-solid part of the previous slice is solid, not printing the part of the current slice covering the non-solid part of the previous slice, and correspondingly, adjusting the parameter value to zero.
4. The method of photo-curing 3D printing as defined in claim 1, wherein the printing parameters include a duration of light projected onto the liquid photosensitive resin, and the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value is: and controlling the duration of the light source projecting the liquid photosensitive resin to be a preset duration according to the adjusted parameter value.
5. The method of claim 1, wherein the printing parameters include intensity of light projected onto the liquid photosensitive resin, and the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter values is: and according to the adjusted parameter value, the gray value of the part, corresponding to the non-solid part of the previous slice, of the image of the current slice is increased, so that the intensity of the part of the image transmitted by light is reduced to the preset intensity.
6. The method of claim 1, wherein when the printing parameter is a distance between the bottom end of the molding platform and the bottom end of the liquid storage tank, the step of controlling the light projected onto the liquid photosensitive resin according to the adjusted parameter value is: according to the distance between the bottom end of the forming platform and the bottom end of the liquid storage tank after adjustment, light is projected to part of liquid resin between the bottom end of the forming platform and the bottom end of the liquid storage tank so as to solidify the part of liquid resin.
7. The photo-curing 3D printing method according to claim 1, further comprising the step of:
When the solid part included in the current slice does not cover the part above the previous slice, controlling the light projected onto the liquid photosensitive resin according to the original parameter value, so that the light projected onto the photosensitive resin solidifies the liquid photosensitive resin to form a printing layer corresponding to the current slice.
8. The photo-curing 3D printing method according to claim 1, further comprising the step of:
Judging whether all slices of the pre-printing model are printed; and
When all the slices of the preprinted model are not printed, controlling a platform driving device connected with the forming platform to move, so that the platform driving device drives the forming platform to move for a preset distance according to a preset direction.
9. The light-cured 3D printing method of claim 1, wherein the non-solid portion of the previous slice is outside of a hole or a notch or an edge.
10. An electronic device comprising a processor and a memory, wherein the memory has stored therein a plurality of program modules that are loaded by the processor and that perform the photo-curing 3D printing method of any of claims 1-9.
11. A storage medium having stored thereon at least one computer instruction, wherein the instructions are executed by a processor and loaded to perform the photo-curing 3D printing method of any of claims 1-9.
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| CN115284609B (en) * | 2022-08-01 | 2024-06-18 | 深圳市金石三维打印科技有限公司 | Component surface smooth printing method, device and equipment of photo-curing 3D printer |
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