CN114013045B - Method and device for generating 3D printing file, computer equipment and storage medium - Google Patents

Method and device for generating 3D printing file, computer equipment and storage medium Download PDF

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Publication number
CN114013045B
CN114013045B CN202111262737.7A CN202111262737A CN114013045B CN 114013045 B CN114013045 B CN 114013045B CN 202111262737 A CN202111262737 A CN 202111262737A CN 114013045 B CN114013045 B CN 114013045B
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Prior art keywords
support
printing
model
slice
generating
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CN202111262737.7A
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Chinese (zh)
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CN114013045A (en
Inventor
敖丹军
唐京科
刘洪�
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Shenzhen Chuangxiang 3D Technology Co Ltd
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Shenzhen Chuangxiang 3D Technology Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
    • 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
    • B29C64/30—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The application discloses a method, a device, computer equipment and a storage medium for generating a 3D printing file, wherein the method for generating the 3D printing file comprises the following steps: acquiring a suspension area of a model to be printed; traversing each suspension area, and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to the printing platform, wherein the support comprises a support bridge pier positioned at a target end and a support bridge deck parallel to the printing line direction; slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate a 3D printing file. The support generated by the generation method has smaller volume, can not only improve the utilization rate of printing raw materials, but also facilitate the support to be removed from the printed model after printing is finished, and improves the printing precision.

Description

Method and device for generating 3D printing file, computer equipment and storage medium
Technical Field
The present application relates to the field of 3D printing technologies, and in particular, to a method and apparatus for generating a 3D print file, a computer device, and a storage medium.
Background
In the current 3D model printing of FDM (Fused Deposition Modeling ), when generating model slices, supports are added to the suspended parts of the model to print. Current printing techniques typically add support from the printing platform to the support points when the support is added, but after printing is complete, the support material needs to be removed. Thus, the support in the prior art is relatively bulky, resulting in waste of printing raw materials.
Disclosure of Invention
The first object of the present application is to provide a method for generating a 3D print file, in which the added volume of the support is small, the waste of printing raw materials is reduced, and the printing cost is reduced.
A second object of the present application is to provide a 3D print file generating apparatus capable of performing the above method for generating a 3D print file.
A third object of the present application is to propose a computer device, which when executing a computer program is able to implement the method of generating a 3D print file as described above.
A fourth object of the present application is to propose a storage medium containing computer-executable instructions which, when executed by a computer processor, can be used to carry out the method of generating a 3D print file as described hereinbefore.
In order to achieve the technical effects, the technical scheme of the application is as follows:
the application discloses a method for generating a 3D printing file, which comprises the following steps: acquiring a suspension area of a model to be printed; traversing each suspension area, and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to a printing platform, wherein the support comprises a support bridge pier positioned at the target end and a support bridge deck parallel to the printing wiring direction; slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate a 3D printing file. Because in the generation process of the 3D printing file, the printing structure supporting the suspension area of the model to be printed comprises a supporting bridge pier and a supporting bridge deck, and the supporting bridge deck is not generated from the printing platform, but is generated between the supporting bridge pier and the model to be printed which is not required to be supported, the volume of the whole printing supporting structure is reduced, the utilization rate of printing raw materials is improved, the supporting can be conveniently removed from the printed model after printing is finished, and the printing precision is improved.
In some embodiments, the acquiring the suspended area of the model to be printed includes: generating a model slice of a model to be printed; determining a non-overlapping region of the projection of the model slice located above with respect to the projection of the model slice located below in the two adjacent model slices; and acquiring the suspension area of the model to be printed according to each non-coincident area. The position of the suspended area is determined according to the slice shape of the model, so that the speed of determining the suspended area can be improved, and the generation speed of the 3D printing file is improved.
In some embodiments, before determining the target end to be supported according to the intersection line between two ends of the currently traversed floating area along the printing routing direction and other areas and the slice shape of the currently traversed floating area, the method further includes: and if the length of the suspended area along the printing line direction is greater than the preset maximum line length, entering the intersecting line between two ends of the suspended area along the printing line direction and other areas and the slice shape of the suspended area currently traversed according to the current traversed, and determining a target end needing to generate support. According to the difference of the models, not all suspended areas need to be determined to be supported at the target end, and the suspended areas which do not need to be determined at the target end can be screened out in the step, so that the number of supports is reduced, and the waste of printing raw materials is further reduced.
In some embodiments, the determining the target end that needs to generate the support according to the intersection line between two ends of the currently traversed floating area along the printing routing direction and other areas and the slice shape of the currently traversed floating area includes: acquiring intersection lines of two ends of the currently traversed suspended area along the printing wiring direction and other areas; determining the maximum length of the currently traversed suspended area along the direction perpendicular to the printing routing direction according to the slice shape of the currently traversed suspended area; and determining one end corresponding to the intersection line with the length smaller than the maximum length as a target end. After the target end is determined, the position of the supporting bridge pier can be directly determined, so that the generation of the supporting bridge pier and the supporting bridge deck is facilitated.
In some specific embodiments, the supporting bridge pier and the supporting deck are generated by: determining the position of a supporting pier and the width of the supporting pier along the direction perpendicular to the printing line according to the intersection line corresponding to the target end and the maximum length; confirming the height of the supporting bridge pier according to the lowest point of the suspended area; generating a supporting bridge pier according to the position, the height and the width; and generating a supporting bridge deck between the supporting bridge pier and the model to be printed. Therefore, the generated supporting bridge pier and supporting bridge deck can stably support the suspended area, and printing raw materials can be saved, so that the utilization rate of the printing raw materials is improved.
In some embodiments, if the lower surface of the suspended area is uneven, the support further comprises additional support between the support deck and the suspended area. Therefore, the suspended area can be stably supported under the condition that the lower surface of the suspended area is uneven, and the stable printing process is ensured.
In some embodiments, after the slicing the support to generate a support slice, further comprising: the printing speed and the printing flow of the supporting bridge deck are set to prevent the supporting bridge deck from sinking towards the printing platform. Thereby, it is ensured that the supporting deck can stably support the suspended area.
The application also discloses a device for generating the 3D printing file, which comprises the following steps: the acquisition module is used for acquiring a suspension area of the model to be printed; the support generating module is used for traversing each suspension area and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to a printing platform, wherein the support comprises a support bridge pier positioned at the target end and a support bridge deck parallel to the printing line direction; and the file generation module is used for slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate a 3D printing file.
The application also discloses a computer device, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the generation method of the 3D printing file when executing the computer program.
The application also discloses a storage medium containing computer executable instructions which, when executed by a computer processor, are used to perform the method of generating a 3D print file as described hereinbefore.
The method for generating the 3D printing file has the beneficial effects that: because in the generation process of the 3D printing file, the printing structure supporting the suspension area of the model to be printed comprises a supporting bridge pier and a supporting bridge deck, and the supporting bridge deck is not generated from the printing platform, but is generated between the supporting bridge pier and the model to be printed which is not required to be supported, the volume of the whole printing supporting structure is reduced, the utilization rate of printing raw materials is improved, the supporting can be conveniently removed from the printed model after printing is finished, and the printing precision is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
Fig. 1 is a schematic step diagram of a method for generating a 3D print file according to a first embodiment of the present application;
FIG. 2 is a schematic diagram illustrating steps for obtaining a suspended area of a model to be printed according to a first embodiment of the present application;
FIG. 3 is a schematic diagram of a target end step for determining that a support needs to be generated according to a first embodiment of the present application;
fig. 4 is a schematic view showing steps of supporting a bridge pier and supporting a deck according to the first embodiment of the present application;
FIG. 5 is a diagram of a 3D print file generated by integrating a model slice of the model to be printed and the support slice according to an embodiment of the present application;
FIG. 6 is a top view of a first model to be printed according to the present application;
FIG. 7 is a front view of a second model to be printed and a support of the present application;
FIG. 8 is a front view of a third model to be printed and a support of the present application;
FIG. 9 is a front view of a fourth model to be printed and a support of the present application;
fig. 10 is a schematic step diagram of a method for generating a 3D print file according to the second embodiment of the present application;
FIG. 11 is a schematic diagram of a 3D print file generation apparatus according to an embodiment of the present application;
FIG. 12 is a schematic diagram of a computer device according to an embodiment of the application.
Reference numerals:
1. a model to be printed; 2. a suspended area; 21. a first suspended area; 22. a second suspended area; 23. a third suspended area; 3. supporting the bridge pier; 4. supporting the bridge deck; 5. and (5) additional support.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the application more clear, the technical scheme of the application is further described below by a specific embodiment in combination with the attached drawings.
In the description of the present application, it should be understood that the directions or positional relationships indicated by "length", "width", "upper", "lower", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Specific flows of two embodiments of the 3D print file generation method according to the embodiment of the present application are described below with reference to fig. 1 to 8.
Embodiment one:
as shown in fig. 1, the method for generating a 3D print file of the present embodiment includes the steps of:
s1: and obtaining a suspension area of the model to be printed.
In the actual printing process, not all structures of the model to be printed need to be supported, and according to different structures of the model to be printed, only the suspended area 2 which is not supported below the model to be printed 1 needs to be supported, so that the main area which is not required to be supported in the model to be printed 1 and the suspended area 2 which is required to be supported in the 3D printing file are required to be divided in the first step of the generating method of the 3D printing file, and then the suspended area 2 is supported and added.
Specifically, as shown in fig. 2, the procedure of acquiring the suspended area 2 of the model 1 to be printed is as follows:
s11: and generating a model slice of the model to be printed.
In the actual operation process, the model 1 to be printed can be directly imported into slicing software, the slicing parameters are set to slice the whole model, the specific slicing software can be selected according to actual needs, and the specific type of the slicing software is not limited.
S12: and determining a non-overlapping region of the projection of the model slice positioned above with respect to the projection of the model slice positioned below in the two adjacent model slices.
S13: and acquiring the suspension area of the model to be printed according to each non-coincident area.
It will be appreciated that after slicing, the upper model slice minus the lower model slice may be supported beyond the lower model slice if the upper model slice has a larger area than the lower model slice, depending on the shape of the slice. According to the judgment basis, the two model slices can be projected towards the printing platform at the same time, and according to the projection relation, the region of the model slice of the upper layer corresponding to the overlapping region is supported by the model slice of the lower layer, namely, the region of the model slice of the upper layer corresponding to the overlapping region is not required to be supported. The area of the model slice of the upper layer corresponding to the non-overlapping area is a part exceeding the model slice of the lower layer, which is possibly required to be supported, when the judgment of each adjacent model slice is completed, each non-overlapping area can be obtained, and the connected non-overlapping areas form a suspension area, so that each suspension area of the model 1 to be printed can be obtained.
Of course, when the hanging region 2 of the model 1 to be printed is acquired, since the user can see which part of the model 1 to be printed is the hanging region 2 according to observation, in step S1, the hanging region 2 may be designated by the user, and the slicing software determines the hanging region 2 of the model 1 to be printed according to the user designation after receiving the user designation.
S2: traversing each suspension area, and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; and generating a support to the printing platform, wherein the support comprises a support bridge pier positioned at the target end and a support bridge deck parallel to the printing line direction.
Specifically, as shown in fig. 3, the procedure for determining the target end to be supported is as follows:
s21: and acquiring intersection lines of two ends of the currently traversed suspended area along the printing wiring direction and other areas.
It should be noted that if two sides of the suspended area 2 are connected with other areas, the suspended area 2 has two intersecting lines with a length other than 0, and if only one side of the suspended area 2 is connected with the other areas, one of the intersecting lines of the suspended area is 0, and the other intersecting line of the suspended area is not 0; if the two sides of the suspended area 2 are not connected with other areas, the length of two intersecting lines of the suspended area is 0.
S22: and determining the maximum length of the currently traversed suspended area along the direction perpendicular to the printing routing according to the slice shape of the currently traversed suspended area.
S23: and determining one end corresponding to the intersection line with the length smaller than the maximum length as a target end.
Specifically, as shown in fig. 6, as a top view of the first model to be printed, the suspension area 2 includes a first suspension area 21, a second suspension area 22 and a third suspension area 23, the printing routing direction is from left to right, for the first suspension area 21, the intersection length of the left side of the first suspension area 21 and other areas is equal to the maximum length of the first suspension area 21 along the direction perpendicular to the printing routing direction, the intersection length of the right side of the first suspension area 21 and other areas is smaller than the maximum length of the first suspension area 21 along the direction perpendicular to the printing routing direction, and then the right side of the first suspension area 21 is the target end, so that in order to ensure the normal printing of the first suspension area 21, a support is also required to be arranged on the side. For the second suspension area 22, the intersection length of the left side of the second suspension area 22 and other areas is equal to the maximum length of the second suspension area 22 along the direction perpendicular to the printing line, the left side of the second suspension area 22 is not the target end, and the intersection length of the right side of the second suspension area 22 and other areas is equal to 0, namely is smaller than the maximum length of the second suspension area 22 along the direction perpendicular to the printing line, and the right side of the second suspension area 22 is the target end; for the third suspension area 23, the length of the intersection line between the left side and the right side of the third suspension area 23 and other areas is equal to 0, that is, is smaller than the maximum length of the second suspension area 22 along the direction perpendicular to the printing line, and then the left side and the right side of the third suspension area 23 are both target ends.
After the target end is determined, a support is generated for the printing platform, wherein the support comprises a support pier of the target end and a support bridge deck parallel to the printing line direction. As shown in fig. 7, which is a front view of the second model to be printed and the support, wherein the right side of the suspended area 2 is the target end, the support 3 and the support bridge deck parallel to the printing routing direction are generated from the right side of the suspended area 2. As shown in fig. 8, a front view of the third to-be-printed model and the support is shown, wherein the left side and the right side of the suspended area 24 are both target ends, and then the support 3 is generated from the left side and the right side of the suspended area 24, and a support bridge deck parallel to the printing routing direction is generated.
In addition, in the actual operation, when the target end is determined in step S23, the following may be adopted: s23: and determining one end corresponding to the intersection line with the length smaller than the preset length as a target end. The preset length can be selected according to actual needs, and can be larger than the maximum length or smaller than the maximum length. That is, in determining the target end, the selected comparison criterion may be selected according to actual needs, and is not limited to the maximum length described above.
Further, as shown in fig. 4, the supporting bridge pier 3 and the supporting deck 4 are produced by:
s24: and determining the position of the support pier and the width of the support pier along the direction perpendicular to the printing line according to the intersection line and the maximum length corresponding to the target end.
Specifically, the difference between the intersection line and the maximum length corresponding to the target end is calculated, the difference is used as the width of the support bridge pier along the direction perpendicular to the printing line, and according to the coordinate value of the point on the intersection line, the abscissa of the point projected by the support bridge pier comprises the abscissa of the point on the intersection line, so that the position of the support bridge pier is determined.
S25: and confirming the height of the supporting bridge pier according to the lowest point of the suspended area.
It will be appreciated that the resulting support deck 4 needs to be secured below the suspended area 2, so that the lowest point of the suspended area 2 needs to be confirmed when the height of the support pier 3 is confirmed, and the height of the support pier 3 needs to be slightly lower than the lowest point of the suspended area 2, so that the lowest point of the suspended area 2 just falls on the support deck 4.
S26, generating a supporting pier according to the position, the height and the width.
Preferably, in the process of generating the support pier 3, the support pier 3 can be generated into a completely hollow or semi-hollow structure, so that the supported printing material can be further reduced, and the utilization rate of the printing material is further improved.
S27, generating a supporting bridge deck between the bridge pier and the model to be printed.
In the process of generating the support bridge deck 4, the thickness of the support bridge deck 4 can be adjusted according to actual needs, if the support bridge deck 4 is multi-layer, the support bridge deck 4 of the lower layer can be arranged into a plurality of printing lines arranged at intervals, the support bridge deck 4 of the upper layer is of a compact surface structure, and thus the printing material used for supporting can be further reduced, and the utilization rate of the printing material is further improved.
In one example, as shown in fig. 9, the lower surface of the suspended area 2 may be determined after the support bridge pier 3 and the support bridge deck 4 are generated, and if the lower surface of the suspended area 2 is a plane parallel to the printing platform, it is indicated that the support bridge deck 4 can fully support the suspended area 2. If the lower surface of the suspended area 2 is uneven or inclined, an additional support 5 needs to be added between the support bridge deck 4 and the suspended area 2, and the additional support 5 can support the concave surface in the suspended area 2, so that the whole suspended area 2 can be stably supported. The additional support 5 is formed directly on the surface of the suspended area 2 with the support deck 4 as a reference surface.
It should be noted that, if the length of the intersection line between the two sides of the suspended area 2 and other areas is not zero and is equal to the maximum length of the suspended area 2 along the direction perpendicular to the printing line, the two sides of the suspended area 2 are all connected with the other areas, and in this case, the two sides of the suspended area 2 are not target ends, and a supporting bridge deck 4 is directly arranged below the suspended area 2.
S3: slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate a 3D printing file.
After the support is generated, the support can be sliced, the slicing software can be selected according to actual needs, and the slicing specific software and operation are not limited.
Further, as shown in fig. 5, the integration process is as follows:
s31: the model slice and the support slice at the same height are integrated into an actual slice.
It will be appreciated that the moulding of the mould 1 to be printed with the support during actual printing can improve the printing efficiency. The model slice and the support slice at the same height can be integrated in the process of integrating the model slice generated in the previous step after the support slice is generated, so that the model 1 to be printed and the support can be printed simultaneously in the printing process.
S32: the print path is generated from the model slice and the actual slice that are offset from the support slice.
Since the support is only for supporting the suspended area 2 of the model 1 to be printed, there must be a part of the model slices which are offset in height from the support slices, and these model slices also need to be integrated.
In summary, in the actual integration process, if the model slice has a supporting slice with the same height as the model slice, the model slice and the supporting slice are integrated together to form a new actual slice, after all model slices are traversed, a complete model 1 to be printed and a supporting slice can be obtained, and the model 1 to be printed and the supporting slice can be printed simultaneously according to the finally generated slice planning printing path.
S33: the printing speed and the printing flow of the printing support bridge deck are set to avoid the support bridge deck sinking towards the printing platform.
It will be appreciated that the printing speed and printing flow of the support deck 4 need to be set after the printing path is generated, in order to ensure that the support deck 4 can stably support the suspended area 2, the printing speed and printing flow of the print deck are set to ensure that the support deck 4 is parallel to the printing platform. Specifically, the printing speed of the printing support deck 4 is set to V Bridge The printing speed of the model 1 to be printed is V Model ，0.1≤V Bridge /V Model Less than or equal to 0.3; printing flow of printing support bridge deck 4 is Q Bridge The print flow of the model 1 to be printed is Q Model ，0.2≤Q Bridge /Q Model Less than or equal to 0.5. Of course, in the actual setting process, V Bridge And V Model Relation of (c) and Q Bridge And Q Model The relationship of (2) can be determined according to the specific printing parameters of the 3D printer and the original type of use, and is given only by way of example in the present embodiment, not for V Bridge And Q Bridge Is fully defined by (a).
Embodiment two:
the steps of the method for generating a 3D print file according to the present embodiment are substantially the same as those in the first embodiment, and as shown in fig. 10, in the steps of the present embodiment, step Q1 is the same as step S1 in the first embodiment, step Q3 is the same as step S2 in the first embodiment, and step Q4 is the same as step S3 in the first embodiment. In contrast, the method for generating a 3D file in this embodiment further includes a step Q2 between the step Q1 and the step Q3, and the specific flow of the step Q2 is as follows:
q2: and judging the relation between the length of the suspended area along the printing wiring direction and the preset maximum wiring length.
It will be appreciated that if the length of the suspended area 2 along the printing track direction (if the suspended area 2 is irregularly shaped, the maximum value of the lengths of the suspended area 2 along the printing track direction is selected) is smaller than the preset maximum track length (the maximum track length is the maximum length of the printing track without sagging), that is, even if the suspended area 2 is directly printed, the sagging phenomenon of the printing track does not occur, no support needs to be added. If the length of the suspended area 2 along the printing routing direction is greater than the preset maximum routing length, a support needs to be added below the suspended area 2. That is, although the suspended area 2 is determined in step S1, according to the actual situation, not all suspended areas 2 need to be supported, so that the determination in step Q2 is required, and the suspended areas 2 that do not need to be supported can be removed after the determination, thereby reducing the number of supports and reducing the original waste of printing.
It should be noted here that, in the present embodiment, after step Q2, step Q3 is performed,
q3: traversing each suspension area, and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to the printing platform, wherein the support comprises a support bridge pier positioned at a target end and a support bridge deck parallel to the printing line direction;
in step Q3, traversing the dangling areas in the dangling areas refers to: the suspended area determined in step Q1 removes the portion of step Q2 where no support needs to be added. The subsequent floating regions also refer to the portions of the floating region removal step Q2 determined in step Q1 where no support needs to be added.
The application also discloses a device for generating the 3D printing file, which comprises an acquisition module, a support generation module and a file generation module as shown in fig. 11. The acquisition module is used for acquiring a suspension area of the model to be printed; the support generating module is used for traversing each suspension area, and determining a target end required to generate a support according to the intersecting line of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to the printing platform, wherein the support comprises a support bridge pier positioned at a target end and a support bridge deck parallel to the printing line direction; the file generation module is used for slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate the 3D printing file.
The generation device of the 3D print file can be directly a 3D printer or a common computer, and in actual use, the 3D print file can be directly generated by the 3D printer or can be poured into the 3D printer after the generation on the computer is finished.
The application also discloses a computer device, as shown in fig. 12, comprising a memory and a processor, wherein the memory stores a computer program, and the processor realizes the generation method of the 3D printing file when executing the computer program. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal or a printer, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program, when executed by a processor, implements a method for generating contours of hypotenuse three-dimensional words. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 12 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
The application also discloses a storage medium containing computer executable instructions which, when executed by a computer processor, are used to perform the method of generating 3D print files of the foregoing.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary of the present application, and those skilled in the art should not be considered as limiting the application, since modifications may be made in the specific embodiments and application scope of the application in light of the teachings of the present application.

Claims (9)

1. A method for generating a 3D print file, comprising:
acquiring a suspension area of a model to be printed;
traversing each suspension area, and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to a printing platform, wherein the support comprises a support bridge pier positioned at the target end and a support bridge deck parallel to the printing wiring direction;
slicing the support to generate a support slice, and integrating a model slice of the model to be printed and the support slice to generate a 3D printing file, wherein: the step of determining the target end comprises the following steps:
acquiring intersection lines of two ends of the currently traversed suspended area along the printing wiring direction and other areas;
determining the maximum length of the currently traversed suspended area along the direction perpendicular to the printing routing direction according to the slice shape of the currently traversed suspended area;
and determining one end corresponding to the intersection line with the length smaller than the maximum length as the target end.
2. The method for generating a 3D print file according to claim 1, wherein the obtaining the hanging area of the model to be printed includes:
generating the model slice of the model to be printed;
determining a non-overlapping region of the projection of the model slice located above with respect to the projection of the model slice located below in the two adjacent model slices;
and acquiring the suspension area of the model to be printed according to each non-coincident area.
3. The method for generating a 3D printed document according to claim 1, wherein before determining a target end to be supported according to an intersection line between two ends of the currently traversed floating region in a printing routing direction and other regions and a slice shape of the currently traversed floating region, the method further comprises:
judging the relation between the length of the suspended area along the printing wiring direction and the preset maximum wiring length; wherein:
if the length of the suspended area along the printing line direction is greater than the preset maximum line length, entering a step of determining a target end needing to generate support according to the intersection line of two ends of the currently traversed suspended area along the printing line direction and other areas and the slice shape of the currently traversed suspended area.
4. The method of generating a 3D printed document according to claim 1, wherein the supporting bridge pier and the supporting bridge deck are generated by:
determining the position of the supporting bridge pier and the width of the supporting bridge pier along the direction perpendicular to the printing line according to the intersection line corresponding to the target end and the maximum length;
confirming the height of the supporting bridge pier according to the lowest point of the suspended area;
generating the supporting bridge pier according to the position, the height and the width;
and generating the supporting bridge deck between the supporting bridge pier and the model to be printed.
5. The method of claim 1, wherein the support further comprises an additional support between the support deck and the hanging area if the lower surface of the hanging area is uneven.
6. The method of generating a 3D print file according to claim 1, further comprising, after the slicing the support to generate a support slice:
the printing speed and the printing flow of the supporting bridge deck are set to prevent the supporting bridge deck from sinking towards the printing platform.
7. A generation apparatus of a 3D print file, comprising:
the acquisition module is used for acquiring a suspension area of the model to be printed;
the support generating module is used for traversing each suspension area and determining a target end required to generate support according to intersecting lines of two ends of the currently traversed suspension area along the printing routing direction and other areas and the slice shape of the currently traversed suspension area; generating a support to a printing platform, wherein the support comprises a support bridge pier positioned at the target end and a support bridge deck parallel to the printing line direction;
the step of determining the target end comprises the following steps:
acquiring intersection lines of two ends of the currently traversed suspended area along the printing wiring direction and other areas;
determining the maximum length of the currently traversed suspended area along the direction perpendicular to the printing routing direction according to the slice shape of the currently traversed suspended area;
determining one end corresponding to the intersection line with the length smaller than the maximum length as the target end;
and the file generation module is used for slicing the support to generate a support slice, and integrating the model slice of the model to be printed and the support slice to generate a 3D printing file.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the method of generating a 3D printed file according to any of claims 1-6 when executing the computer program.
9. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the method of generating a 3D print file as claimed in any one of claims 1 to 6.
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