CN114103124B - Three-dimensional printing method, device, equipment and computer readable medium for top compensation - Google Patents
Three-dimensional printing method, device, equipment and computer readable medium for top compensation Download PDFInfo
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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
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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
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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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- 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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Abstract
The application provides a three-dimensional printing method, a three-dimensional printing device and a computer readable medium for tip compensation. The method comprises the following steps: acquiring a three-dimensional data model of a printing object; horizontally dividing the three-dimensional data model into a plurality of layers; determining a top layer of the three-dimensional data model; selecting a first reference horizontal plane from each determined top layer according to the first preset position parameters; acquiring a cross-sectional area of a first reference horizontal plane at each top layer as a compensation area; and performing top compensation processing on the exposure area of each top layer according to the compensation area, and obtaining the exposure area of the top layer after top compensation. The method can carry out the top compensation processing on the top end part of the printing object, thereby realizing the deviation control on the top end part of the printing finished product.
Description
Technical Field
The application relates generally to the technical field of three-dimensional printing, and in particular relates to a three-dimensional printing method, a three-dimensional printing device, three-dimensional printing equipment and a computer readable medium for top compensation.
Background
Different three-dimensional printing application scenes have different requirements on the precision deviation of the three-dimensional printing finished product. In some three-dimensional printing application scenarios, only the top end portion of the three-dimensional printed print product is allowed to experience a positive deviation, and no negative deviation is allowed to occur. Such as dental braces and dental casts, require that the three-dimensionally printed cast have a positive deviation in the cusp position rather than a negative deviation, otherwise the produced braces affect wear. In some other three-dimensional printing application scenarios, only the top portion of the three-dimensional printed print product is allowed to experience negative deviations, and no positive deviations.
However, in the current three-dimensional printing technology of performing layering printing from bottom to top, it is often difficult to meet the deviation control requirement at the top portion of the printed product. Therefore, how to achieve deviation control of the top end portion of the printed product is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The technical problem to be solved by the application is to provide a three-dimensional printing method, a three-dimensional printing system, a three-dimensional printing device and a computer readable medium for top compensation, which can perform top compensation processing on a top end part of a printing object, thereby realizing deviation control on the top end part of a printing finished product.
In order to solve the above technical problems, the present application provides a three-dimensional printing method with top compensation, including: acquiring a three-dimensional data model of a printing object; horizontally dividing the three-dimensional data model into a plurality of layers; determining a top layer of the three-dimensional data model; selecting a first reference horizontal plane from each determined top layer according to the first preset position parameters; acquiring a cross-sectional area of the first reference horizontal plane at each top layer as a compensation area; and performing top compensation processing on the exposure area of each top layer according to the compensation area, and obtaining the exposure area of the top layer after top compensation.
In an embodiment of the present application, the determining the top layer of the three-dimensional data model includes: determining one or more bottom cross-sectional areas of the current layer; determining a respective top reference region from each bottom cross-sectional region, wherein the top reference region is a top region of the current layer located above the bottom cross-sectional region; and judging whether an exposure area exists in the top reference area, if not, determining that the current layer is the top layer of the three-dimensional data model.
In an embodiment of the present application, the area of the compensation area is greater than 0; the performing tip compensation processing on the exposure area of the tip layer according to the compensation area includes: and setting the areas above and below the compensation area in the top layer as exposure areas.
In an embodiment of the present application, the first preset position parameter is lower than a print judgment reference position of each layer.
In an embodiment of the present application, the area of the compensation area is 0, and performing, according to the compensation area, tip compensation processing on the exposure area of the tip layer includes: and setting the exposure area of the top layer as a non-exposure area.
In an embodiment of the present application, the first preset position parameter is higher than a print judgment reference position of each layer.
In an embodiment of the present application, the determining the top layer of the three-dimensional data model includes: selecting a third reference level and a fourth reference level in each layer of the three-dimensional data model, wherein the third reference level is lower than the fourth reference level; judging whether the area of the third reference level in the cross-sectional area of the layer is greater than 0 and whether the area of the fourth reference level in the cross-sectional area of the layer is 0; and if the area of the third reference level in the cross-sectional area of the layer is greater than 0 and the area of the fourth reference level in the cross-sectional area of the layer is 0, determining that the layer is the top layer of the three-dimensional data model.
In order to solve the technical problem, the application further provides a three-dimensional printing device, which comprises: the model acquisition module is used for acquiring a three-dimensional data model of the printing object; the layering module is used for horizontally dividing the three-dimensional data model into multiple layers; a top determining module for determining a top layer of the three-dimensional data model; the first selecting module is used for selecting a first reference horizontal plane from each determined top layer according to a first preset position parameter; the area acquisition module is used for acquiring the cross-sectional area of the first reference horizontal plane at each top layer as a compensation area; and the compensation module is used for carrying out top compensation processing on the exposure area of each top layer according to the compensation area and obtaining the exposure area of the top layer after top compensation.
To solve the above technical problem, the present application further provides a three-dimensional printing apparatus, including a printing mechanism and a controller configured to control the printing mechanism to perform the three-dimensional printing method of tip compensation as described above.
To solve the above technical problem, the present application also provides a computer readable medium storing computer program code which, when executed by a processor, implements a three-dimensional printing method of tip compensation as described above.
Compared with the prior art, the three-dimensional printing method, device, equipment and computer readable medium for top compensation realize deviation control of the top end part of a printing finished product by performing top compensation processing on the top end of the three-dimensional data model of a printing object, and can meet the requirements of different three-dimensional printing application scenes on positive deviation or negative deviation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the accompanying drawings:
fig. 1 is a schematic view of a basic structure of a photo-curing type three-dimensional printing apparatus according to an embodiment of the present application.
FIG. 2 is a flow chart illustrating a top-compensated three-dimensional printing method that is being compensated according to one embodiment of the present application.
Fig. 3 is a flow chart illustrating a method of implementing step 203 of fig. 2 according to an embodiment of the present application.
FIG. 4 is a hierarchical schematic diagram of a three-dimensional data model, according to an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating a top positive compensation process according to an embodiment of the present application.
FIG. 6 is a flow chart illustrating a negative compensated top-end compensated three-dimensional printing method according to one embodiment of the present application.
Fig. 7 is a schematic diagram illustrating a top negative compensation process according to an embodiment of the present application.
Fig. 8 is a block diagram of a three-dimensional printing apparatus according to an embodiment of the present application.
Fig. 9 is a controller architecture diagram of a photo-curing three-dimensional printing apparatus according to an embodiment of the present application.
Fig. 10 is a flow chart illustrating a method of implementing step 203 of fig. 2 according to another embodiment of the present application.
FIG. 11 is a hierarchical schematic diagram of a three-dimensional data model shown according to another embodiment of the present application.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments disclosed below.
As used herein, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.
In describing embodiments of the present application in detail, the cross-sectional view of the device structure is not partially exaggerated to a general scale for convenience of description, and the schematic drawings are merely examples, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For ease of description, spatially relative terms such as "under", "below", "beneath", "above", "upper" and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary words "below" and "beneath" can encompass both an orientation of above and below. The device may have other orientations (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein interpreted accordingly. Furthermore, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, as well as embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.
It will be understood that when an element is referred to as being "on," "connected to," "coupled to," or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," or "directly contacting" another element, there are no intervening elements present. Likewise, when a first element is referred to as being "electrically contacted" or "electrically coupled" to a second element, there are electrical paths between the first element and the second element that allow current to flow. The electrical path may include a capacitor, a coupled inductor, and/or other components that allow current to flow even without direct contact between conductive components.
It will be appreciated that the description below is merely exemplary and that one skilled in the art can make various changes without departing from the spirit of the present application.
Fig. 1 illustrates a basic structure of a photo-curing type three-dimensional (Three Dimensional, 3D) printing apparatus according to an embodiment of the present application. This 3D printing apparatus 100 includes a material tank 110 for accommodating a photo-curable resin, an image exposure system 120 for curing the photo-curable resin, and a lift table 130 for connecting a molded workpiece. The elevating table 130 is vertically movable up and down. The image exposure system 120 is located above the material tank 110 and irradiates the beam image to cure a layer of photo-curable resin on the liquid surface of the material tank 110. After each time the image exposure system 120 irradiates the light beam image to cure one layer of photo-curing resin, the lifting table 130 drives the molded layer of photo-curing resin to slightly descend, and the cured top surface of the workpiece uniformly spreads the photo-curing resin through the scraping plate 131 to wait for the next irradiation. The squeegee 131 is movable in the horizontal direction. And by means of the circulation, the three-dimensional workpiece formed in a layer-by-layer accumulated mode can be obtained.
The image exposure system 120 may irradiate a beam image to the photo-curable resin to form a desired exposure pattern. The image exposure system 120 may use various known techniques capable of forming an image of the light beam, which is not limited in this application.
For example, in one embodiment, the image exposure system 120 may use digital light processing (Digital Light Procession, DLP) projection techniques. DLP projection imaging techniques are implemented using digital micromirror elements (Digital Micromirror Device, DMD) to control the reflection of light. The digital micromirror device can be regarded as a mirror. This mirror is composed of hundreds of thousands or even millions of micromirrors. Each micromirror represents a pixel from which the image is formed.
In another embodiment, image exposure system 120 may also use Liquid Crystal (LCD) projection technology. The liquid crystal panel comprises a plurality of pixels, each pixel can independently control the polarization direction of polarized light, and the polarized light filters on two sides of the liquid crystal panel can control whether the light of one pixel passes through or not, so that the light beam passing through the liquid crystal panel system is imaged.
The photo-curing type 3D printing apparatus 100 inputs a three-dimensional data model of a printing object and then decomposes the three-dimensional data model into a number of two-dimensional images. Each two-dimensional image represents a layer of the print object. The photo-curing type 3D printing apparatus 100 transmits these two-dimensional images to the image exposure system 120, and then projects the images by the latter.
The application provides a three-dimensional printing method with top compensation. The three-dimensional printing method of the top compensation can be divided into two cases of positive compensation and negative compensation. The positive compensation is applied to a three-dimensional printing application scene which only allows positive deviation to occur. The top end part of the three-dimensional printing finished product subjected to positive compensation is slightly higher than the original top end, so that negative deviation is ensured not to occur. Negative compensation is applied in three-dimensional printing application scenarios where only negative deviations are allowed to occur. The top end part of the three-dimensional printing finished product subjected to the negative compensation top end compensation treatment is slightly lower than the original top end, so that positive deviation is ensured not to occur.
The above-described positive compensation case and negative compensation case are each described in detail with different embodiments.
FIG. 2 is a flow chart illustrating a top-compensated three-dimensional printing method that is being compensated according to one embodiment of the present application. Referring to fig. 2, the three-dimensional printing method of the tip compensation includes the steps of:
and 206, performing top compensation processing on the exposure area of each top layer according to the compensation area, and obtaining the exposure area of the top layer after top compensation.
The three-dimensional printing method of tip compensation of the present embodiment can be applied to a three-dimensional printing apparatus. The following describes in detail the respective steps of the three-dimensional printing method of tip compensation of the present embodiment:
in step 201, the three-dimensional printing apparatus acquires an original three-dimensional data model of a print object, wherein the original three-dimensional data model refers to a three-dimensional data model that has not undergone tip compensation processing.
In step 202, the three-dimensional printing apparatus horizontally divides the three-dimensional data model into a plurality of layers.
In step 203, the three-dimensional printing apparatus determines a top layer of the three-dimensional data model. The apex refers to the highest raised portion in a certain area. A print object may have one or more tips. In the layered three-dimensional data model, the layer at which the top is located is referred to as the top layer. When the print object has a plurality of tips, the plurality of tips may or may not be at the same level. When the plurality of top ends of the print object are not at the same level, the top ends at different levels are divided into different layers at the time of layering. Thus, the three-dimensional data model may have one or more top layers.
Fig. 3 is a flow chart illustrating a method of implementing step 203 of fig. 2 according to an embodiment of the present application. In an embodiment of the present application, as shown in fig. 3, the three-dimensional printing apparatus may implement step 203 of the embodiment of fig. 2 by determining a top layer of the three-dimensional data model:
The above steps 301-303 are described in detail below in conjunction with fig. 4:
fig. 4 shows a hierarchically processed three-dimensional data model, which is divided into 4 layers as shown in fig. 4. The top portion of the three-dimensional data model is the hatched portion in fig. 4, and the 4 th layer where the top portion is located is the top layer.
In step 301, when the current layer is layer 4, the device determines a bottom cross-sectional area A1 of the current layer. A bottom cross-sectional area refers to a continuous exposed area on the bottommost portion of each layer, and a layer may have one or more bottom cross-sectional areas. Layer 4 of the three-dimensional data model in fig. 4 has only one bottom cross-sectional area A1.
In step 302, the device determines a top reference area A2 corresponding to the bottom cross-sectional area A1 from the bottom cross-sectional area A1. One top reference area is the top area of the current layer that is located above one bottom cross-sectional area, so that there is and only one top reference area per bottom cross-sectional area, and the projections of both on the horizontal plane are completely coincident.
In step 303, the apparatus determines whether an exposure area exists in the top reference area A2. Because there is no exposure area within the top reference area A2, the device can determine that the current layer (layer 4) is the top layer of the three-dimensional data model.
In summary, in steps 301-303, it can be accurately determined whether the current layer is the top layer of the three-dimensional data model by determining whether the top reference area of the current layer has an exposure area.
Fig. 10 is a flow chart illustrating a method of implementing step 203 of fig. 2 according to another embodiment of the present application. In another embodiment of the present application, as shown in fig. 10, the three-dimensional printing apparatus may implement step 203 of the embodiment of fig. 2 by determining a top layer of the three-dimensional data model:
in step 1003, if the area of the third reference level in the cross-sectional area of the layer is greater than 0 and the area of the fourth reference level in the cross-sectional area of the layer is 0, determining that the layer is the top layer of the three-dimensional data model.
The above steps 1001-1003 are described in detail below in conjunction with fig. 11:
fig. 11 shows a three-dimensional data model subjected to hierarchical processing, which is divided into 4 layers as shown in fig. 11. The top portion of the three-dimensional data model is the hatched portion in fig. 11, and the 4 th layer where the top portion is located is the top layer.
As shown in fig. 11, the device selects a third reference level C1 and a fourth reference level C2 at layer 4, wherein the third reference level C1 is lower than the fourth reference level C2. The apparatus determines whether the area of the cross-sectional area of the third reference level C1 at the 4 th layer is greater than 0, and determines whether the area of the cross-sectional area of the fourth reference level C2 at the 4 th layer is 0. As shown in fig. 11, the area of the cross-sectional area of the third reference level C1 at the 4 th layer is greater than 0 and the area of the cross-sectional area of the fourth reference level C2 at the 4 th layer is 0, so the apparatus can determine that the 4 th layer satisfies the condition of the top layer, which is the top layer of the three-dimensional data model.
In summary, in the steps 1001-1003, it can be accurately determined whether the layer is the top layer of the three-dimensional data model by determining whether the area of the third reference level in the cross-sectional area of the layer and the area of the fourth reference level in the cross-sectional area of the layer meet the preset conditions.
In step 204, the three-dimensional printing device selects a first reference level in each determined top layer according to the first preset position parameter. Fig. 5 is a schematic diagram illustrating a top positive compensation process according to an embodiment of the present application. As shown in fig. 5, the horizontal section a is a printing judgment reference position of the top layer, and the horizontal section B is a first reference horizontal plane selected in the top layer according to a first preset position parameter. In an embodiment of the present application, the first preset position parameter may be lower than a print determination reference position of each layer of the three-dimensional printing apparatus. That is, the first reference level B is lower in height than the horizontal section a. In general, the height of the first reference level B is not only lower than the height of the horizontal section a, but also the compensation process effect is greater as it is closer to the bottom of the top layer.
In step 205, the three-dimensional printing apparatus acquires a cross-sectional area of the first reference level at each tip layer as a compensation area, wherein the cross-sectional area refers to a cross-section formed by the first reference level in the tip layer and the tip layer. In an embodiment of the present application, the area of the compensation area may be set to be greater than 0. When the compensation area is 0, the exposure area of the first reference level is also 0, and it is considered that the tip compensation process of the positive compensation of the present embodiment is not necessary at this time.
In step 206, the three-dimensional printing apparatus performs a tip compensation process on the exposure area of each tip layer according to the compensation area, and then obtains the exposure area of the tip layer after the tip compensation.
In performing the tip-up compensation process of the present embodiment, the three-dimensional printing apparatus can perform the tip-up compensation process by setting the areas of the tip layer located above and below the compensation area as the exposure area. As shown in fig. 5, the regions of the tip layer above and below the compensation region are each set as an exposure region indicated by a hatched region, thereby obtaining a tip layer subjected to tip compensation processing. In three-dimensional printing using the tip layer subjected to the tip treatment, the three-dimensional printing apparatus exposes the tip layer according to the shadow area in fig. 5, and the shadow area is printed. When the area of the exposure area of the top layer before compensation is 0, the printing finished product is higher than before compensation due to one more layer after the positive compensation treatment; when the exposure area of the front top layer before compensation is not 0, the number of printing layers after the positive compensation is the same, and the exposure area of the front top layer after compensation is larger than that before the positive compensation.
It should be noted that the tip compensation process may be performed directly in each tip layer (i.e., tip slice exposure image) or laser scan path of the three-dimensional data model. That is, the three-dimensional printing apparatus may or may not obtain the tip-compensated three-dimensional data model. The user can select according to the actual application condition, and the application is not limited to this.
FIG. 6 is a flow chart illustrating a negative compensated top-end compensated three-dimensional printing method according to one embodiment of the present application. Referring to fig. 6, the negative-compensated top-end compensated three-dimensional printing method includes the following steps 601-606:
and step 606, performing tip compensation processing on the exposure area of each tip layer according to the compensation area, and obtaining the exposure area of the tip layer after tip compensation.
The three-dimensional printing method of tip compensation of the present embodiment can be applied to a three-dimensional printing apparatus. The above description of steps 601-603 and 605 may refer to steps 101-103 and 105 of the top-compensated three-dimensional printing method being compensated for in the embodiment of fig. 2, respectively, and will not be repeated herein. The following describes in detail the step 604 and the step 606 of the three-dimensional printing method of tip compensation in this embodiment:
in step 604, a first reference level is selected in each determined top tier according to a first preset location parameter. Fig. 7 is a schematic diagram illustrating a top negative compensation process according to an embodiment of the present application. As shown in fig. 7, the horizontal section a is a print determination reference position of the top layer, and the horizontal section B is a first reference level selected in the top layer according to a first preset position parameter. In an embodiment of the present application, the first preset position parameter may be higher than a print determination reference position of each layer of the three-dimensional printing apparatus. That is, the first reference level B is higher than the horizontal cross-section a. In general, the height of the first reference level B is not only higher than the height of the horizontal section a, but also the compensation process effect is greater as it is closer to the top of the top layer.
In step 606, the three-dimensional printing apparatus performs a tip compensation process on the exposure area of each tip layer according to the compensation area, and obtains the exposure area of the tip layer after the tip compensation.
In performing the tip end negative compensation processing of the present embodiment, when the area of the compensation region is 0, the apparatus may set the exposure region of the tip end layer as a non-exposure region to perform the tip end compensation processing of negative compensation; when the area of the compensation region is not 0, since the area of the compensation region is generally smaller than the exposure region of the tip layer, the apparatus can perform the tip compensation process of negative compensation by setting the regions of the tip layer located above and below the compensation region as new exposure regions.
As shown in fig. 7, the first reference level B of the top layer in fig. 7 does not have an exposure area, i.e., the area of the compensation area is 0. Thus, the apparatus sets the exposed area of the top layer as a non-exposed area. As shown in fig. 7, the exposure area of each layer is indicated by a hatched area in fig. 7, and the hatched area is not present in the top layer subjected to the top negative compensation process, that is, the entire area of the top layer of the three-dimensional data model is not subjected to the exposure process.
It should be noted that the tip compensation process may be performed directly in each tip layer (i.e., tip slice exposure image) or laser scan path of the three-dimensional data model. That is, the three-dimensional printing apparatus may or may not obtain the tip-compensated three-dimensional data model. The user can select according to the actual application condition, and the application is not limited to this.
After the processing of the negative compensation top end compensation three-dimensional printing method in this embodiment, the top end of the printing product obtained by three-dimensional printing is lower than the top end without the top end compensation processing, or the exposure area of the top end layer becomes smaller, thereby realizing the top end negative compensation processing of the printing object.
The application also provides a three-dimensional printing device. Fig. 8 is a block diagram of a three-dimensional printing apparatus according to an embodiment of the present application. As shown in fig. 8, the three-dimensional printing apparatus 800 includes a model acquisition module 801, a layering module 802, a tip determination module 803, a first selection module 804, a region acquisition module 805, and a compensation module 806.
The model acquisition module 801 is configured to acquire a three-dimensional data model of a print object.
The layering module 802 is used to horizontally divide the three-dimensional data model into multiple layers.
The top determination module 803 is configured to determine a top layer of the three-dimensional data model.
The first selecting module 804 is configured to select a first reference level in each determined top layer according to a first preset position parameter. The area acquisition module 805 is configured to acquire a cross-sectional area of the first reference level at each top layer as a compensation area. The compensation module 806 is configured to perform a top compensation process on the exposed area of each top layer according to the compensation area, and obtain an exposed area of the top layer after top compensation.
Operations performed by the modules 801-806 described above may be referred to accordingly in the description of steps 201-206 described above in the embodiment of fig. 2 or in the description of steps 601-606 described above in the embodiment of fig. 6, and will not be described again here.
The present application also provides a three-dimensional printing apparatus comprising a printing mechanism and a controller configured to control the printing mechanism to perform a three-dimensional printing method of tip compensation as described above.
Fig. 9 shows a controller architecture diagram of a photo-curing three-dimensional printing apparatus according to an embodiment of the present application. Referring to fig. 9, the controller 900 of the photo-curing three-dimensional printing apparatus may include a memory 910 and a processor 920. Memory 910 is used for storing instructions that are executable by processor 920. The processor 920 is configured to execute instructions to implement the tip-compensated three-dimensional printing method described above.
In some embodiments of the present application, the controller 900 further includes a communication port 930, an input/output device 940, and an internal communication bus 950.
The communication port 930 may be responsible for data communication between the controller 900 and an external device (not shown). The input/output device 940 may support input/output data streams and image streams between the controller 900 and other components. By way of example, the input/output device 940 may include one or more of the following components: keyboard, mouse, camera, display, scanner, touch screen, handwriting input pad, microphone, or any combination thereof. The input/output device 940 may input various numeric data, or various non-numeric data, such as graphics, video, audio, etc., to the controller 900. Internal communication bus 950 may enable data communication between components in controller 900.
It will be appreciated that a tip-compensated three-dimensional printing method of the present application is not limited to being implemented by one photo-curable three-dimensional printing device, but may be implemented in tandem by multiple online photo-curable three-dimensional printing devices. The online photo-curing three-dimensional printing device may be connected and communicate via a local area network or a wide area network.
Further implementation details of the three-dimensional printing apparatus of the present embodiment may be described with reference to the embodiments of fig. 1 to 8, and will not be described here.
The present application also provides a computer readable medium storing computer program code which, when executed by a processor, implements a tip compensated three-dimensional printing method as described above.
In one embodiment of the present application, the computer program code may implement the tip compensated three-dimensional printing method described above when executed by the processor 920 in the controller 900 shown in fig. 9.
For example, a tip-compensated three-dimensional printing method of the present application may be implemented as a program of a photo-cured three-dimensional printing method, stored in the memory 910, and loadable into the processor 920 for execution, to implement the tip-compensated three-dimensional printing method of the present application.
When the tip-compensated three-dimensional printing method is implemented as a computer program, it may also be stored in a computer-readable storage medium as an article of manufacture. For example, computer-readable storage media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD)), smart cards, and flash memory devices (e.g., electrically erasable programmable read-only memory (EPROM), cards, sticks, key drives). Moreover, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media (and/or storage media) capable of storing, containing, and/or carrying code and/or instructions and/or data.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing application disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.
Some aspects of the methods and systems of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, micro-code, etc.) or by a combination of hardware and software. The above hardware or software may be referred to as a "data block," module, "" engine, "" unit, "" component, "or" system. The processor may be one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital signal processing devices (DAPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may take the form of a computer product, comprising computer-readable program code, embodied in one or more computer-readable media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, tape … …), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD) … …), smart cards, and flash memory devices (e.g., card, stick, key drive … …).
The computer readable signal medium may comprise a propagated data signal with computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take on a variety of forms, including electro-magnetic, optical, etc., or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer readable signal medium may be propagated through any suitable medium including radio, cable, fiber optic cable, radio frequency signals, or the like, or a combination of any of the foregoing.
The computer program code necessary for operation of portions of the present application may be written in any one or more programming languages, including an object oriented programming language such as Java, scala, smalltalk, eiffel, JADE, emerald, C ++, c#, vb net, python, etc., a conventional programming language such as C language, visual Basic, fortran 2003, perl, COBOL 2002, PHP, ABAP, dynamic programming languages such as Python, ruby and Groovy, or other programming languages, etc. The program code may execute entirely on the user's computer or as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any form of network, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or the use of services such as software as a service (SaaS) in a cloud computing environment.
Furthermore, the order in which the elements and sequences are presented, the use of numerical letters, or other designations are used in the application and are not intended to limit the order in which the processes and methods of the application are performed unless explicitly recited in the claims. While certain presently useful application embodiments have been discussed in the foregoing disclosure by way of various examples, it is to be understood that such details are for the purpose of illustration only and that the appended claims are not to be limited to the disclosed embodiments, but rather are intended to cover all modifications and equivalent combinations that fall within the spirit and scope of the embodiments of the present application. For example, while the system components described above may be implemented by hardware devices, they may also be implemented solely by software solutions, such as installing the described system on an existing server or mobile device.
Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more application embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.
In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.
While the present application has been described with reference to the present specific embodiments, those of ordinary skill in the art will recognize that the above embodiments are for illustrative purposes only, and that various equivalent changes or substitutions can be made without departing from the spirit of the present application, and therefore, all changes and modifications to the embodiments described above are intended to be within the scope of the claims of the present application.
Claims (6)
1. A tip-compensated three-dimensional printing method, comprising:
acquiring a three-dimensional data model of a printing object;
horizontally dividing the three-dimensional data model into a plurality of layers;
determining a top layer of the three-dimensional data model;
selecting a first reference horizontal plane from each determined top layer according to the first preset position parameters;
acquiring a cross-sectional area of the first reference horizontal plane at each top layer as a compensation area; and
performing top compensation treatment on the exposure area of each top layer according to the compensation area, and obtaining the exposure area of the top layer after top compensation;
when the first preset position parameter is lower than the printing judgment reference position of each layer, the area of the compensation area is larger than 0, and the top compensation processing on the exposure area of the top layer according to the compensation area comprises the following steps: setting the areas above and below the compensation area in the top layer as exposure areas; and
when the first preset position parameter is higher than the printing judgment reference position of each layer, the area of the compensation area is 0, and the top compensation processing for the exposure area of the top layer according to the compensation area comprises the following steps: and setting the exposure area of the top layer as a non-exposure area.
2. The three-dimensional printing method of claim 1, wherein the determining the top layer of the three-dimensional data model comprises:
determining one or more bottom cross-sectional areas of the current layer;
determining a respective top reference region from each bottom cross-sectional region, wherein the top reference region is a top region of the current layer located above the bottom cross-sectional region; and
and judging whether an exposure area exists in the top reference area, and if not, determining that the current layer is the top layer of the three-dimensional data model.
3. The three-dimensional printing method of claim 1, wherein the determining the top layer of the three-dimensional data model comprises:
selecting a third reference level and a fourth reference level in each layer of the three-dimensional data model, wherein the third reference level is lower than the fourth reference level;
judging whether the area of the third reference level in the cross-sectional area of the layer is greater than 0 and whether the area of the fourth reference level in the cross-sectional area of the layer is 0; and
and if the area of the third reference level in the cross-sectional area of the layer is larger than 0 and the area of the fourth reference level in the cross-sectional area of the layer is 0, determining that the layer is the top layer of the three-dimensional data model.
4. A three-dimensional printing apparatus employing the three-dimensional printing method according to any one of claims 1 to 3, comprising:
the model acquisition module is used for acquiring a three-dimensional data model of the printing object;
the layering module is used for horizontally dividing the three-dimensional data model into multiple layers;
a top determining module for determining a top layer of the three-dimensional data model;
the first selecting module is used for selecting a first reference horizontal plane from each determined top layer according to a first preset position parameter;
the area acquisition module is used for acquiring the cross-sectional area of the first reference horizontal plane at each top layer as a compensation area; and
and the compensation module is used for carrying out top compensation processing on the exposure area of each top layer according to the compensation area and obtaining the exposure area of the top layer after top compensation.
5. A three-dimensional printing apparatus comprising a printing mechanism and a controller configured to control the printing mechanism to perform the three-dimensional printing method of any one of claims 1-3.
6. A computer readable medium storing computer program code which, when executed by a processor, implements the three-dimensional printing method according to any one of claims 1-3.
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| US5999184A (en) * | 1990-10-30 | 1999-12-07 | 3D Systems, Inc. | Simultaneous multiple layer curing in stereolithography |
| CN105058795B (en) * | 2015-08-06 | 2017-03-08 | 清华大学 | The error compensating method of increasing material manufacturing |
| CN108790177A (en) * | 2018-06-13 | 2018-11-13 | 东莞市原力无限打印科技有限公司 | A kind of test method of test 3D printing object fineness |
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