CN114311653A - 3D printing file generation method and device, terminal and storage medium - Google Patents

3D printing file generation method and device, terminal and storage medium Download PDF

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Publication number
CN114311653A
CN114311653A CN202111457100.3A CN202111457100A CN114311653A CN 114311653 A CN114311653 A CN 114311653A CN 202111457100 A CN202111457100 A CN 202111457100A CN 114311653 A CN114311653 A CN 114311653A
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slice
target
extrusion amount
material extrusion
routing
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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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Priority to CN202111457100.3A priority Critical patent/CN114311653A/en
Publication of CN114311653A publication Critical patent/CN114311653A/en
Priority to PCT/CN2022/132817 priority patent/WO2023098490A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205—Means for applying layers
    • B29C64/209—Heads; Nozzles
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

The application relates to a method, a device, a terminal and a storage medium for generating a 3D printing file, which comprise the following steps: determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length, replacing the preset material extrusion amount corresponding to the target slice with the target material extrusion amount, and generating a printing file; the extrusion amount of the target material is greater than the preset material extrusion amount of the target slice, and the target slice comprises a first slice or a second slice; the width of walking the line of the sliced section of printing out according to target material extrusion capacity can be wideer promptly, can compensate the gap between adjacent two-layer, improves and prints the effect.

Description

3D printing file generation method and device, terminal and storage medium
Technical Field
The present application relates to the field of 3D printing technologies, and in particular, to a method, an apparatus, a terminal, and a storage medium for generating a 3D print file.
Background
In the field of 3D printing technology, a common 3D printing technology is Fused Deposition Modeling (FDM) printing technology, where a print nozzle heats and melts a thermoplastic material according to each layer of slices, and the melted material is ejected along the outline and filling trajectory of each layer of slices to complete printing of each layer of slices, that is, the FDM printing technology is a 3D stereoscopic model formed by layer-by-layer printing and stacking.
For each layer of slices, the contour edge formed by the material ejected by the print nozzles is vertical, as can be seen, for example, in fig. 1(a) and 1 (b).
For each layer of slices corresponding to the inclined part in the 3D stereoscopic model, a certain offset will exist between the printed upper and lower layer profiles, and when the inclination angle of the inclined part is large, the offset between the upper and lower layer profiles will be larger than the routing width of the single layer profile, resulting in a gap existing between the upper and lower layer profiles (see offset X and routing width L marked in fig. 1 (b)), causing model defects, and thus, the printing effect is poor.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a terminal and a storage medium for generating a 3D print file, which can reduce a gap between upper and lower layer outlines of an inclined surface and further improve a printing effect, in order to solve the above technical problems.
In a first aspect, a method for generating a 3D print file is provided, the method including:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
In one embodiment, determining whether a gap exists in the first slice in the trace width direction relative to the second slice after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed includes:
determining the inclination angles of the first slice and the second slice in the routing height direction according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed;
and determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
In one embodiment, determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle includes:
determining that a gap exists in the first slice relative to the second slice in the routing width direction under the condition that the inclination angle is larger than a preset angle threshold; the preset angle threshold is determined according to the width and height of the wire.
In one embodiment, the method further comprises: according to the inclusion
Figure BDA0003386954260000021
Determining the width of the routing; wherein E is the actual material extrusion amount of the first slice or the second sliceThe extrusion amount of the materials is preset or target, S is unit material length, and H is wiring height.
In one embodiment, before determining the target material extrusion amount of the printing nozzle when printing the target slice according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length, the method further includes:
determining the offset of the first slice relative to the second slice in the track width direction according to a relational expression containing (H multiplied by tan theta); wherein H is the trace height, and theta is the inclination angle.
In one embodiment, determining the target material extrusion amount of the printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length comprises:
determining the target material extrusion amount of a printing nozzle when printing a target slice according to a relational expression containing (S multiplied by H multiplied by X); and S is the unit material length, H is the wiring height, and X is the offset of the first slice relative to the second slice in the wiring width direction.
In one embodiment, determining the target material extrusion amount of the printing nozzle when printing the target slice according to a relation including (S × H × X), includes:
and determining the target material extrusion amount of the printing nozzle when the target slice is printed according to a relational expression comprising (n multiplied by S multiplied by H multiplied by X), wherein n is more than 1.
In a second aspect, there is provided an apparatus for generating a 3D print file, the apparatus comprising:
the first determining module is used for determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
the second determining module is used for determining the target material extrusion amount of the printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length under the condition that a gap exists; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and the generating module is used for replacing the preset material extrusion amount with the target material extrusion amount and generating a printing file.
In a third aspect, a terminal is provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
According to the method, the device, the terminal and the storage medium for generating the 3D printing file, whether a gap exists between the first slice and the second slice in the routing width direction after the first slice and the second slice are printed is determined according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; under the condition that a gap exists between the first slice and the second slice, determining target material extrusion amount of a printing nozzle when the target slice is printed according to offset of the first slice relative to the second slice in the routing width direction, routing height and unit material length, replacing preset material extrusion amount corresponding to the target slice with the target material extrusion amount, and generating a printing file; the target material extrusion amount is larger than the preset material extrusion amount of the target slice, and the target slice comprises a first slice or a second slice; that is to say, in the embodiment of the present application, for each layer of slice information of an initially generated 3D printing model, it is determined in advance whether a gap exists between two adjacent layers of slices after each layer of slices is printed, if a gap exists, a preset material extrusion amount of the slices is corrected, and a target material extrusion amount is modified, so as to generate a print file, so that when a printer prints the slices according to the print file, the printer can print the target slices according to the corrected target material extrusion amount, and an actual trace width of the target slices printed according to the target material extrusion amount is wider than a trace width before correction, so that the gap between the upper and lower layers of slices after printing gradually becomes smaller, even no gap exists; the material extrusion capacity of printing nozzle when printing the section through increasing in this embodiment promptly increases the sliced actual width of walking the line after printing, compensates the gap that exists between the upper and lower two-layer section for the slope part of the model that prints out is more perfect, has improved the printing effect of model.
Drawings
FIG. 1(a) is a schematic front view of a portion of an inclined surface in a 3D printing model according to an embodiment;
FIG. 1(b) is a schematic top view of two layers of the 3D printed model with the inclined surface;
FIG. 2 is a diagram showing an application environment of a method of generating a 3D print file according to an embodiment;
FIG. 3 is a flowchart illustrating a method of generating a 3D print file according to an embodiment;
FIG. 4 is a schematic diagram illustrating a top view of a two-layer slice after correction in one embodiment;
FIG. 5(a) is a schematic top view of two layers of corrected slices in another embodiment;
FIG. 5(b) is a schematic front view showing the structure of the inclined surface portion of the corrected model in another embodiment;
FIG. 6 is a flowchart illustrating a method of generating a 3D print file according to another embodiment;
FIG. 7 is a block diagram showing a configuration of a 3D print file generating apparatus according to an embodiment;
fig. 8 is an internal structural view of a terminal in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for generating the 3D printing file can be applied to the application environment shown in FIG. 2. The terminal 101 communicates with the 3D printer 102 by wire or wireless. The terminal 101 can be installed with print file generation software of a 3D model, the print file generation software can generate a 3D print model including multilayer slice information, and send each layer of slice information of the 3D print model to a 3D printer, so that the 3D printer can perform printing operation on each layer of slice according to each layer of slice information to obtain a 3D object stacked by the multilayer slices and having a certain routing width and routing height; the terminal 101 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and the like, and the 3D printer 102 may be, but is not limited to, various types of 3D printers that employ FDM printing technology.
It should be noted that the method for generating a 3D print file in the embodiment of the present application may be applied to a terminal, and may also be applied to a 3D printer, where when the 3D print method is applied to a terminal, the terminal may determine and modify each layer of slice information according to the method for generating the 3D print file to generate a print file, so that the printer may print a model according to the print file; when the 3D print file generation method is applied to a 3D printer, the 3D printer may determine and correct two adjacent layers of slices in a print file of a 3D model to be printed, which is sent by a terminal, according to the 3D print file generation method to generate a corrected print file, and print each layer of slices according to the corrected print file.
In one embodiment, as shown in fig. 3, a method for generating a 3D print file is provided, which is described by taking the method as an example of being applied to the terminal in fig. 2, and includes the following steps:
step 301, determining whether a gap exists in the first slice relative to the second slice in the trace width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed.
The first slice and the second slice are adjacent upper and lower slices. The first contour coordinate of the first slice and the second contour coordinate of the second slice are two contour coordinates that are opposite up and down in the vertical direction (Z-axis direction), and the two contour coordinates need to be the same side coordinate on the first slice and the second slice, for example: the two contour coordinates are both the outermost contour coordinate of the slice, or are both the innermost contour coordinate of the slice, and the like; optionally, two contour coordinates that are opposite to each other in the first slice and the second slice and satisfy the above condition may be selected, which is not limited in this embodiment of the application. In addition, the trace width direction may be a direction perpendicular to the Z axis in fig. 1, i.e. a direction in which each layer of slices is tiled.
Optionally, after the first slice and the second slice are printed, the offset of the first slice relative to the second slice may be calculated according to the first contour coordinate of the first slice and the second contour coordinate of the second slice, and whether a gap exists between the first slice and the second slice is determined according to the offset and the routing width of the second slice; optionally, in a case that the offset is greater than the trace width of the second slice, it may be determined that a gap exists between the first slice and the second slice; in addition, the trace width of the second slice may be an actual trace width after the second slice is printed.
And 302, under the condition that a gap exists, determining the target material extrusion amount of the printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length.
Wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice includes either the first slice or the second slice. It should be noted that the material extrusion amount is the volume of the extruded material in unit time, the routing height is the slice thickness after the slice printing, and the unit material length is the moving distance of the printing nozzle from one point to another point in unit time, that is, the length of the material extruded by the printing nozzle in unit time; optionally, the routing height and the unit material length may be preset fixed values, or may be flexibly set according to actual printing requirements.
Optionally, the corresponding relationship between different offsets, different routing heights, and different unit material lengths may be preset according to experimental verification and experience accumulation.
Under the condition that a gap exists between the first slice and the second slice, determining the target material extrusion amount of the printing nozzle when the target slice is printed according to the corresponding relation, the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; optionally, the preset material extrusion amount of the first slice may be corrected to obtain a target material extrusion amount of the first slice; the preset material extrusion amount of the second slice can be corrected to obtain the target material extrusion amount of the second slice; because the target material extrusion capacity is greater than the preset material extrusion capacity, therefore, the target wiring width printed according to the target material extrusion capacity is greater than the wiring width printed according to the preset material extrusion capacity, and under the condition that the wiring width is increased, the gap between the first slice and the second slice is reduced and even filled, namely, the gap between the first slice and the second slice can be compensated by increasing the wiring width, so that the printing effect is better and perfect.
Alternatively, as shown in fig. 4, based on the offset of the first slice (upper layer trace) relative to the second slice (lower layer trace) in the trace width direction, the trace height, and the unit material length, the target material extrusion amount of the printing nozzle when printing the first slice can be determined, that is, the gap between the first slice and the second slice can be made up by increasing the trace width of the first slice.
Alternatively, as shown in fig. 5(a), according to the offset of the first slice (upper layer trace) relative to the second slice (lower layer trace) in the trace width direction, the trace height, and the unit material length, the target material extrusion amount of the printing nozzle when printing the second slice may be determined, that is, the gap between the first slice and the second slice may be made up by increasing the trace width of the second slice. It should be noted that, when the gap between the lower layer wire and the upper layer wire is compensated by increasing the material extrusion amount of the lower layer wire, the overall inclination angle of the model is kept consistent with the inclination angle of the model before correction, as shown in fig. 5(b), based on this, the obtained corrected model can keep the same inclination angle as the original model and can also compensate the gap between two adjacent layers, the obtained printed model has higher matching degree with the original model, the model is more perfect, and the printing effect is better.
And step 303, replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
Optionally, after the target material extrusion amount of the target slice is determined, a preset material extrusion amount in a print instruction (geocode) corresponding to the target slice may be replaced by the current target material extrusion amount, and a print file is generated according to the modified geocode instruction, so that after the print file is sent to a printer, the printer may control a print nozzle to print the target slice according to the target material extrusion amount in the geocode instruction after analyzing the geocode instruction.
According to the method for generating the 3D printing file, whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed is determined according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; under the condition that a gap exists between the first slice and the second slice, determining target material extrusion amount of a printing nozzle when the target slice is printed according to offset of the first slice relative to the second slice in the routing width direction, routing height and unit material length, replacing preset material extrusion amount corresponding to the target slice with the target material extrusion amount, and generating a printing file; the target material extrusion amount is larger than the preset material extrusion amount of the target slice, and the target slice comprises a first slice or a second slice; that is to say, in the embodiment of the present application, for each layer of slice information of an initially generated 3D printing model, it is determined in advance whether a gap exists between two adjacent layers of slices after each layer of slices is printed, if a gap exists, a preset material extrusion amount of the slices is corrected, and a target material extrusion amount is modified, so as to generate a print file, so that when a printer prints the slices according to the print file, the printer can print the target slices according to the corrected target material extrusion amount, and an actual trace width of the target slices printed according to the target material extrusion amount is wider than a trace width before correction, so that the gap between the upper and lower layers of slices after printing gradually becomes smaller, even no gap exists; the material extrusion capacity of printing nozzle when printing the section through increasing in this embodiment promptly increases the sliced actual width of walking the line after printing, compensates the gap that exists between the upper and lower two-layer section for the slope part of the model that prints out is more perfect, has improved the printing effect of model.
Fig. 6 is a flowchart illustrating a method of generating a 3D print file according to an embodiment. This embodiment relates to an optional implementation process for determining whether a gap exists in the first slice in the trace width direction with respect to the second slice after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed, based on the foregoing embodiment, as shown in fig. 6, the foregoing step 301 includes:
step 601, determining the inclination angles of the first slice and the second slice in the routing height direction according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed.
Alternatively, the pythagorean theorem can be adopted to calculate the inclination angles of the first slice and the second slice in the track height direction (i.e., the Z-axis direction) according to the first contour coordinate of the first slice and the second contour coordinate of the second slice.
And step 602, determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
Optionally, whether a gap exists in the first slice relative to the second slice in the track width direction may be determined according to a magnitude relationship between the inclination angle and a preset angle threshold; optionally, when the inclination angle is greater than a preset angle threshold, it may be determined that a gap exists in the track width direction of the first slice relative to the second slice; the preset angle threshold is determined according to the routing width and the routing height, optionally, when the upper slice is a slice formed by inward deviation of the lower slice (that is, the outline area of the upper slice is smaller than that of the lower slice), the routing width may be an actual routing width after the lower slice is printed, and the routing height may be the routing height of the upper slice; under the condition that the upper layer slice is a slice formed by outwards offsetting the lower layer slice (namely the outline area of the upper layer slice is larger than that of the lower layer slice), the routing width can be the actual routing width after the upper layer slice is printed, and the routing height can be the routing height of the lower layer slice.
It should be noted that, since each layer of slices may be printed according to the corrected target material extrusion amount, when correcting the material extrusion amount, each two layers need to calculate a preset angle threshold according to the actual trace width actually printed after correcting one layer of the slices, so as to ensure the accuracy of the gap determination. The actual routing width can be the routing width printed according to the target material extrusion amount, or the routing width printed according to the preset material extrusion amount; for example: based on the printing model shown in fig. 1(a), the extruded quantity of the sliced material is corrected from bottom to top in sequence, and a first slice, a second slice, a third slice, a fourth slice, and the like are assumed to be arranged from bottom to top in sequence.
Firstly, a first preset angle threshold value is calculated according to the routing width of a first slice and the routing height of a second slice, a first inclination angle in the routing height direction is determined according to the contour coordinate of the first slice and the contour coordinate of the second slice, if the first inclination angle is larger than the first preset angle threshold value, a gap is formed between the first slice and the second slice after printing, and the material extrusion amount of a printing nozzle of the second slice can be corrected to be the target material extrusion amount.
Then, judging whether a gap exists between the second slice and the third slice, calculating a second preset angle threshold according to the width of the second slice and the height of the third slice, and determining a second inclination angle in the height direction of the routing according to the contour coordinate of the second slice and the contour coordinate of the third slice; the second slice is printed according to the corrected target material extrusion amount, and materials overflow to two sides on the original printing path, so that the trace width of the printed second slice is widened, and a gap between the second slice and the third slice is possibly compensated while a gap between the second slice and the first slice is compensated; that is to say, the second inclination angle may be smaller than a second preset angle threshold calculated according to the actual track width of the second slice and the track height of the third slice, that is, it is determined that no gap exists between the second slice and the third slice, and it is not necessary to correct the preset material extrusion amount corresponding to the third slice.
Then, judging whether a gap exists between the third slice and the fourth slice, and correcting the material extrusion amount of a printing nozzle corresponding to the fourth slice if the gap possibly exists between the third slice and the fourth slice because the third slice keeps the preset material extrusion amount and is not corrected; and repeating the steps until the uppermost slice of the model to be printed is judged, and finally, generating a printing file of the model to be printed according to the material extrusion amount corresponding to each slice.
Alternatively, may be according to
Figure BDA0003386954260000101
Determining the width of the routing; wherein, E is the actual material extrusion amount of the first slice or the second slice, the actual material extrusion amount can be the preset material extrusion amount or the target material extrusion amount, S is the unit material length, and H is the wiring height.
In this embodiment, according to the first contour coordinate of the first slice and the second contour coordinate of the second slice, the inclination angles of the first slice and the second slice in the vertical direction are determined, and whether a gap exists in the first slice relative to the second slice in the track width direction is determined according to the inclination angles, so that the accuracy of determining the gap can be improved.
In an alternative embodiment of the present application, the step 302 of determining the target material extrusion amount of the printing nozzle when printing the target slice according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length may include: determining the target material extrusion amount of a printing nozzle when printing a target slice according to a relational expression containing (S multiplied by H multiplied by X); and S is the unit material length, H is the wiring height, and X is the offset of the first slice relative to the second slice in the wiring width direction. Alternatively, the offset X of the first slice relative to the second slice in the track width direction may be calculated according to a relation including (H × tan θ), where H is the track height (which may be a fixed value), and θ is the tilt angle determined in step 601.
Preferably, the target material extrusion amount of the printing nozzle when printing the target slice can be determined according to a relational expression comprising (n × S × H × X), wherein n is greater than 1; optionally, the value range of n may also be [1.5,3 ]. The target material extrusion amount calculated through the relational expression and the actual wiring width of the slice printed according to the target material extrusion amount can be wider, and the gap compensation effect can be better.
It should be understood that although the various steps in the flow charts of fig. 3-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 7, there is provided a generation apparatus of a 3D print file, including: a first determining module 701, a second determining module 702 and a generating module 703, wherein:
a first determining module 701, configured to determine, according to a first contour coordinate of a first slice and a second contour coordinate of a second slice of the model to be printed, whether a gap exists in the first slice in the trace width direction relative to the second slice after the first slice and the second slice are printed; the first slice and the second slice are adjacent upper and lower slices;
a second determining module 702, configured to determine, when a gap exists, a target material extrusion amount of a printing nozzle when a target slice is printed according to an offset of the first slice relative to the second slice in a routing width direction, a routing height, and a unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
the generating module 703 is configured to replace the preset material extrusion amount with the target material extrusion amount, and generate a print file.
In one embodiment, the first determining module 701 is specifically configured to determine, according to a first outline coordinate of a first slice and a second outline coordinate of a second slice of the model to be printed, tilt angles of the first slice and the second slice in the track height direction; and determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
In one embodiment, the first determining module 701 is specifically configured to determine that a gap exists in the track width direction of the first slice relative to the second slice when the tilt angle is greater than a preset angle threshold; the preset angle threshold is determined according to the width and height of the wire.
In one embodiment, the apparatus further comprises a third determining module; the third determining module is used for determining the content according to the content
Figure BDA0003386954260000121
Determining the width of the routing; and E is the actual material extrusion amount of the first slice or the second slice, the actual material extrusion amount is the preset material extrusion amount or the target material extrusion amount, S is the unit material length, and H is the wiring height.
In one embodiment, the apparatus further comprises a fourth determining module; the fourth determining module is used for determining the offset of the first slice relative to the second slice in the track width direction according to a relational expression containing (H multiplied by tan theta) before determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length; wherein H is the trace height, and theta is the inclination angle.
In one embodiment, the second determining module 702 is specifically configured to determine the target material extrusion amount of the printing nozzle when the target slice is printed according to a relational expression including (S × H × X); and S is the unit material length, H is the wiring height, and X is the offset of the first slice relative to the second slice in the wiring width direction.
In one embodiment, the second determining module 702 is specifically configured to determine the target material extrusion amount of the printing nozzle when the target slice is printed according to a relation including (n × S × H × X), where n is greater than 1.
For specific limitations of the 3D print file generation apparatus, reference may be made to the above limitations of the 3D print file generation method, which are not described herein again. The modules in the 3D print file generation apparatus may be wholly or partially implemented by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a terminal is provided, an internal structure of which may be as shown in fig. 8. The terminal comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the terminal is configured to provide computing and control capabilities. The memory of the terminal comprises a nonvolatile 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 an operating system and computer programs in the non-volatile storage medium. The communication interface of the terminal is used for carrying out wired or wireless communication with an external 3D printer, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a method of generating a 3D print file. The display screen of the terminal can be a liquid crystal display screen or an electronic ink display screen, and the input device of the terminal can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on a shell of computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a terminal comprising a memory and a processor, the memory having a computer program stored therein, the processor when executing the computer program implementing the steps of:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining the inclination angles of the first slice and the second slice in the routing height direction according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; and determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining that a gap exists in the first slice relative to the second slice in the routing width direction under the condition that the inclination angle is larger than a preset angle threshold; the preset angle threshold is determined according to the width and height of the wire.
In one embodiment, the processor, when executing the computer program, further performs the steps of: according to the inclusion
Figure BDA0003386954260000141
Determining the width of the routing; and E is the actual material extrusion amount of the first slice or the second slice, the actual material extrusion amount is the preset material extrusion amount or the target material extrusion amount, S is the unit material length, and H is the wiring height.
In one embodiment, the processor, when executing the computer program, further performs the steps of: before determining the target material extrusion amount of a printing nozzle when printing a target slice according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length, determining the offset of the first slice relative to the second slice in the track width direction according to a relational expression containing (H multiplied by tan theta); wherein H is the trace height, and theta is the inclination angle.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining the target material extrusion amount of a printing nozzle when printing a target slice according to a relational expression containing (S multiplied by H multiplied by X); and S is the unit material length, H is the wiring height, and X is the offset of the first slice relative to the second slice in the wiring width direction.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and determining the target material extrusion amount of the printing nozzle when the target slice is printed according to a relational expression comprising (n multiplied by S multiplied by H multiplied by X), wherein n is more than 1.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
under the condition that a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the extrusion capacity of the target material is greater than the preset extrusion capacity of the target slice; the target slice comprises a first slice or a second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the inclination angles of the first slice and the second slice in the routing height direction according to the first contour coordinate of the first slice and the second contour coordinate of the second slice of the model to be printed; and determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining that a gap exists in the first slice relative to the second slice in the routing width direction under the condition that the inclination angle is larger than a preset angle threshold; the preset angle threshold is determined according to the width and height of the wire.
In one embodiment, the computer program when executed by the processor further performs the steps of: according to the inclusion
Figure BDA0003386954260000151
Determining the width of the routing; and E is the actual material extrusion amount of the first slice or the second slice, the actual material extrusion amount is the preset material extrusion amount or the target material extrusion amount, S is the unit material length, and H is the wiring height.
In one embodiment, the computer program when executed by the processor further performs the steps of: before determining the target material extrusion amount of a printing nozzle when printing a target slice according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length, determining the offset of the first slice relative to the second slice in the track width direction according to a relational expression containing (H multiplied by tan theta); wherein H is the trace height, and theta is the inclination angle.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the target material extrusion amount of a printing nozzle when printing a target slice according to a relational expression containing (S multiplied by H multiplied by X); and S is the unit material length, H is the wiring height, and X is the offset of the first slice relative to the second slice in the wiring width direction.
In one embodiment, the computer program when executed by the processor further performs the steps of: and determining the target material extrusion amount of the printing nozzle when the target slice is printed according to a relational expression comprising (n multiplied by S multiplied by H multiplied by X), wherein n is more than 1.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A method for generating a 3D printing file is characterized by comprising the following steps:
determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to a first contour coordinate of the first slice and a second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
if a gap exists, determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length; wherein the target material extrusion amount is greater than the preset material extrusion amount of the target slice; the target slice comprises the first slice or the second slice;
and replacing the preset material extrusion amount with the target material extrusion amount, and generating a printing file.
2. The method of claim 1, wherein determining whether a gap exists in the first slice in the trace width direction relative to the second slice after the first slice and the second slice are printed according to a first outline coordinate of the first slice and a second outline coordinate of the second slice of the model to be printed comprises:
determining the inclination angles of a first slice and a second slice in the routing height direction according to a first contour coordinate of the first slice and a second contour coordinate of the second slice of the model to be printed;
and determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the inclination angle.
3. The method of claim 2, wherein said determining whether a gap exists in the first slice relative to the second slice in the track width direction according to the tilt angle comprises:
if the inclination angle is larger than a preset angle threshold, determining that a gap exists in the first slice relative to the second slice in the routing width direction; the preset angle threshold is determined according to the width of the routing and the height of the routing.
4. The method of claim 3, further comprising:
according to the inclusion
Figure FDA0003386954250000011
Determining the width of the routing; wherein E is an actual material extrusion amount of the first slice or the second slice, the actual material extrusion amount is the preset material extrusion amount or the target material extrusion amount, S is the unit material length, and H is the routing height.
5. The method of claim 2, wherein before determining a target material extrusion amount of a print nozzle when printing the target slice based on the offset of the first slice relative to the second slice in the trace width direction, a trace height, and a unit material length, the method further comprises:
determining the offset of the first slice relative to the second slice in the track width direction according to a relational expression containing (H multiplied by tan theta); wherein, H is the routing height, and theta is the inclination angle.
6. The method according to any one of claims 1 to 5, wherein the determining a target material extrusion amount of a printing nozzle when printing the target slice according to the offset of the first slice relative to the second slice in the track width direction, the track height and the unit material length comprises:
determining the target material extrusion amount of a printing nozzle when the target slice is printed according to a relational expression containing (S multiplied by H multiplied by X); and S is the length of the unit material, H is the height of the routing, and X is the offset of the first slice relative to the second slice in the width direction of the routing.
7. The method of claim 6, wherein determining the target material extrusion amount of the printing nozzle when printing the target slice according to a relation comprising (S X H X X) comprises:
and determining the target material extrusion amount of the printing nozzle when the target slice is printed according to a relational expression comprising (n multiplied by S multiplied by H multiplied by X), wherein n is more than 1.
8. An apparatus for generating a 3D print file, the apparatus comprising:
the first determining module is used for determining whether a gap exists in the first slice relative to the second slice in the routing width direction after the first slice and the second slice are printed according to a first contour coordinate of the first slice and a second contour coordinate of the second slice of the model to be printed; the first slice and the second slice are adjacent upper and lower slices;
the second determining module is used for determining the target material extrusion amount of a printing nozzle when the target slice is printed according to the offset of the first slice relative to the second slice in the routing width direction, the routing height and the unit material length under the condition that a gap exists; wherein the target material extrusion amount is greater than the preset material extrusion amount of the target slice; the target slice comprises the first slice or the second slice;
and the generating module is used for replacing the preset material extrusion amount with the target material extrusion amount and generating a printing file.
9. A terminal comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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