CN110328840B - Three-dimensional printing method, system and storage medium - Google Patents

Three-dimensional printing method, system and storage medium Download PDF

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Publication number
CN110328840B
CN110328840B CN201910625937.0A CN201910625937A CN110328840B CN 110328840 B CN110328840 B CN 110328840B CN 201910625937 A CN201910625937 A CN 201910625937A CN 110328840 B CN110328840 B CN 110328840B
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Prior art keywords
printing
data
determining
section
scanning
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CN110328840A (en
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马达荣
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Zhuhai Sailner 3D Technology Co Ltd
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Zhuhai Sailner 3D Technology Co Ltd
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Priority to CN201910625937.0A priority Critical patent/CN110328840B/en
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Priority to PCT/CN2020/082420 priority patent/WO2021004101A1/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
    • 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
    • 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

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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)
  • Ink Jet (AREA)

Abstract

The application discloses a three-dimensional printing method, a system and a storage medium, wherein the method comprises the following steps: determining an outer frame surrounding the section of each sliced layer according to the section shape information of each sliced layer of the three-dimensional model of the three-dimensional object to be printed; determining the scanning and printing direction and the stepping direction of each sliced layer according to the outer frame of the section of each sliced layer; generating printing data of each sliced layer according to the section shape information, the scanning printing direction and the stepping direction of each sliced layer; and forming a plurality of printing layers according to the printing data of each slicing layer, thereby forming the three-dimensional object. This application sets up the extending direction of the shortest side of the outline through the cross-section with every slice layer into step direction, will set up to scan the printing direction with this step direction vertically direction to can make the number of times that the printing in-process of every slice layer carried out the scanning and prints minimum, and then reduce the printing in-process of every slice layer and beat the time that the printer head accelerated and slowed down, improved printing speed.

Description

Three-dimensional printing method, system and storage medium
Technical Field
The present application relates to the field of three-dimensional printing technologies, and in particular, to a three-dimensional printing method, a three-dimensional printing system, and a storage medium.
Background
Three-dimensional printing typically includes the following steps:
1) converting a model to be printed of the target 3D object into data in an STL data format or other data in a data format which can be identified by slicing software;
2) carrying out slicing layering and data processing on the model to be printed by using slicing software to obtain printing data;
3) and the printer performs layer-by-layer printing according to the printing data.
The existing three-dimensional printer generally comprises a printing head, a printing platform and an X, Y, Z three-axis moving mechanism, wherein the three-axis moving mechanism X, Y, Z is used for realizing the relative movement between the printing head and the printing platform, specifically, the printing head moves along the X direction relative to the printing platform to execute the scanning printing operation, and moves along the Y direction to execute the stepping operation, so as to realize the printing of a single slice layer, and after the printing of the single slice layer is finished, the printing head moves along the Z direction relative to the printing platform to perform the printing of the subsequent layer; generally, in order to improve the printing speed, the number of times of acceleration and deceleration movements between the printing head and the printing platform needs to be reduced as much as possible, that is, the three-dimensional object is printed with as few scanning and printing times as possible, and the placing rule of the three-dimensional object in the three-dimensional printing is Lz < Ly < Lx (Lz, Ly, Lx are the dimensions of the three-dimensional object in the Z direction, the Y direction and the X direction, respectively); however, due to the different shapes of the outlines of the different cut sheets of the three-dimensional object, the sizes of the outlines of some cut sheets in the X direction and the Y direction cannot meet the above rule, and further, the printing speed is difficult to further increase.
Disclosure of Invention
In order to overcome the problems in the prior art, the present application is directed to a three-dimensional printing method capable of increasing a printing speed.
In order to achieve the above purpose, the following technical solutions are specifically adopted in the present application:
the application provides a three-dimensional printing method, which comprises the following steps:
and slicing the three-dimensional model of the three-dimensional object to be printed to generate slice data, wherein the slice data comprises the section shape information of each slice layer of the three-dimensional object to be printed.
And determining an outer frame surrounding the section of each slice layer according to the section shape information of each slice layer.
Determining the scanning and printing direction and the stepping direction of each sliced layer according to the outer frame of the section of each sliced layer; the step direction is the extending direction of the shortest side of the outer frame, and the scanning and printing direction is the direction perpendicular to the step direction.
And generating the printing data of each sliced layer according to the section shape information, the scanning printing direction and the stepping direction of each sliced layer.
And forming a plurality of printing layers according to the printing data of each slicing layer, wherein the plurality of printing layers are superposed to form the three-dimensional object to be printed.
Preferably, slicing the three-dimensional model of the three-dimensional object to be printed, and generating slice data comprises:
determining a slice direction of the three-dimensional model.
And judging whether a supporting structure for supporting the three-dimensional model to be printed needs to be generated or not.
And if so, generating a support structure for supporting the three-dimensional model for printing according to the slicing direction, and then slicing the three-dimensional model with the support structure along the determined slicing direction.
And when the judgment result is negative, slicing the three-dimensional model along the determined slicing direction.
Preferably, determining the slice direction of the three-dimensional model comprises:
determining a minimum volume bounding box surrounding the three-dimensional model according to the three-dimensional model, and taking the extension direction of the shortest side of the minimum volume bounding box as the slicing direction of the three-dimensional model; or rotating the three-dimensional model, determining the placing mode with the minimum volume of the supporting structure for supporting the three-dimensional model for printing, and taking the direction vertical to the horizontal plane in the placing mode with the minimum volume as the slicing direction of the three-dimensional model.
Preferably, determining an outer frame surrounding the cross section of each of the slice layers according to the cross-sectional shape information of each of the slice layers includes:
and placing each sliced layer in a two-dimensional coordinate system, wherein the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other.
And determining a coordinate minimum value Xmin and a coordinate maximum value Xmax of the cross section of each sliced layer on the X axis and a coordinate minimum value Ymin and a coordinate maximum value Ymax of the cross section on the Y axis.
And sequentially connecting the coordinate point (Xmin, Ymin), the coordinate point (Xmax, Ymax), the coordinate point (Xmin, Ymax) and the coordinate point (Xmin, Ymin) to obtain an outer frame of the cross section of each sliced layer.
Preferably, determining an outer frame surrounding the cross section of each of the slice layers according to the cross-sectional shape information of each of the slice layers includes:
and placing each sliced layer in a two-dimensional coordinate system, wherein the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other.
And determining two points which are farthest away on the cross section outline of each sliced layer according to the cross section shape of each sliced layer, and connecting the two points.
And finding out points farthest away from the connecting line on two sides of the connecting line between the farthest points.
And taking the two farthest points on the cross section contour of each sliced layer and the two points farthest from the connecting line as tangent points to obtain a plurality of external tangents of the cross section of each sliced layer.
And determining an outer frame of the section of each sliced layer according to the plurality of outer tangents.
Preferably, determining an outer frame surrounding the cross section of each of the slice layers according to the cross-sectional shape information of each of the slice layers includes:
dividing the cross section of each sliced layer into a plurality of regions.
A respective sub-outline is determined in each of the regions.
And determining an outer frame of the section of each sliced layer according to the plurality of sub-outer frames.
Preferably, the print data includes print head rotation angle data, and the print head rotation angle data is used for controlling the print head to rotate so that the extending direction of the nozzle row on the print head is perpendicular to the scanning printing direction.
Preferably, the printing data includes printing platform rotation angle data, and the printing platform rotation angle data is used for controlling the printing platform to rotate so that the scanning printing direction is perpendicular to the extending direction of the nozzle row on the printing head.
Preferably, the print data further includes movement data and print head deposition data of the first direction moving mechanism, the second direction moving mechanism, and the third direction moving mechanism.
The moving data of the first direction moving mechanism and the second direction moving mechanism are used for controlling the printing head or the printing platform to move along the scanning and printing direction to execute scanning and printing operations, and moving along the stepping direction between the adjacent scanning and printing operations to execute stepping operations.
The movement data of the third direction moving mechanism is used for controlling the printing head or the printing platform to move along the direction perpendicular to the plane determined by the scanning printing direction and the stepping direction.
The print head deposition data is used to control the print head to deposit material to the print platform during the scanning printing operation to form the three-dimensional object.
Correspondingly, the present application also provides a three-dimensional printing system, comprising:
the slicing unit is used for slicing the three-dimensional model of the three-dimensional object to be printed to generate slice data, and the slice data comprises the section shape information of each slice layer of the three-dimensional object to be printed.
And the outer frame determining unit is used for determining an outer frame surrounding the section of each sliced layer according to the section shape information of each sliced layer.
And the direction determining unit is used for determining the scanning and printing direction and the stepping direction of each cut layer according to the outer frame of the section of each cut layer, the stepping direction is the extending direction of the shortest side of the outer frame, and the scanning and printing direction is the direction perpendicular to the stepping direction.
And the printing data generating unit is used for generating the printing data of each sliced layer according to the cross section shape information, the scanning printing direction and the stepping direction of each sliced layer.
And the printing layer forming unit is used for forming a plurality of printing layers according to the printing data of each sliced layer, and the plurality of printing layers are superposed to form the three-dimensional object to be printed.
Preferably, the slicing unit includes:
a slice direction determination unit for determining a slice direction of the three-dimensional model.
The judging unit is used for judging whether a supporting structure for supporting the three-dimensional model to be printed needs to be generated or not;
a support structure generating and slicing subunit, configured to, when a determination result is yes, generate a support structure for supporting the three-dimensional model for printing according to the slicing direction, and then slice the three-dimensional model in which the support structure is generated along the determined slicing direction; and when the judgment result is negative, slicing the three-dimensional model along the determined slicing direction.
Preferably, the slice direction determining unit is configured to determine a minimum volume bounding box enclosing the three-dimensional model according to the three-dimensional model, and take an extending direction of a shortest side of the minimum volume bounding box as a slice direction of the three-dimensional model; or, the three-dimensional model is rotated, the placing mode with the smallest volume of the supporting structure for supporting the three-dimensional model for printing is determined, and the direction perpendicular to the horizontal plane in the placing mode with the smallest volume is taken as the slicing direction of the three-dimensional model.
Preferably, the outer frame determining unit includes:
the first setting unit is used for placing each slice layer in a two-dimensional coordinate system, and the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other.
A first determining subunit, configured to determine a coordinate minimum value Xmin and a coordinate maximum value Xmax on an X axis and a coordinate minimum value Ymin and a coordinate maximum value Ymax on a Y axis of a cross section of each slice layer.
And the first outer frame determining subunit is used for sequentially connecting the coordinate point (Xmin, Ymin), the coordinate point (Xmax, Ymax), the coordinate point (Xmin, Ymax) and the coordinate point (Xmin, Ymin) to obtain an outer frame of the cross section of each sliced layer.
Preferably, the outer frame determining unit includes:
and the second setting unit is used for placing each slice layer in a two-dimensional coordinate system, and the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other.
And the second determining subunit is used for determining two points which are farthest away on the cross-sectional profile of each slice layer according to the cross-sectional shape of each slice layer and connecting the two points.
And the third determining subunit is used for finding out the points farthest away from the connecting line on two sides of the connecting line between the farthest points.
And the outer tangent generating unit is used for taking the two farthest points on the cross section outline of each sliced layer and the two farthest points away from the connecting line as tangent points to obtain a plurality of outer tangents of the cross section of each sliced layer.
And the second outer frame determining subunit is used for determining the outer frame of the section of each sliced layer according to the plurality of outer tangents.
Preferably, the outer frame determining unit includes:
and the region dividing unit is used for dividing the section of each sliced layer into a plurality of regions.
And the sub outer frame determining unit is used for determining a corresponding sub outer frame in each area.
And the third outer frame determining subunit is used for determining the outer frame of the section of each sliced layer according to the plurality of the sub-outer frames.
Correspondingly, the application also provides a storage medium, wherein the storage medium comprises a storage program, and the program controls the device where the storage medium is located to execute the three-dimensional printing method when running.
Compared with the prior art, the three-dimensional printing method determines the outer frame surrounding the section of each sliced layer according to the section shape of each sliced layer, and the scanning and printing direction and the stepping direction of each slice layer are determined according to the outer frame of the section of each slice layer, the extending direction of the shortest side of the outer frame of the section of each cut sheet layer is set as the stepping direction, the direction vertical to the stepping direction is set as the scanning printing direction, the printing data is generated according to the section shape information of each cut sheet layer and the determined scanning printing direction and stepping direction, and a plurality of printing layers are printed according to the printing data, so that the scanning printing times of each cut sheet layer in the printing process are minimum, and the time for the printing head to accelerate and decelerate in the printing process of each sliced layer is further reduced, and the printing speed is improved.
Drawings
Fig. 1a, 1b, and 1c are schematic diagrams illustrating a printing state of a three-dimensional printing apparatus according to an embodiment of the present application.
Fig. 2a, 2b, and 2c are schematic diagrams illustrating a printing state of a three-dimensional printing apparatus according to another embodiment of the present application.
Fig. 3 is a flowchart of a three-dimensional printing method according to an embodiment of the present application.
Fig. 4 is a schematic diagram illustrating an outer frame determining method according to an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating an outer frame determining method according to another embodiment of the present application.
Fig. 6 is a schematic diagram illustrating an outer frame determining method according to another embodiment of the present application.
Fig. 7 is a block diagram of a three-dimensional printing system according to an embodiment of the present application.
The attached drawings are as follows:
1. a first cut sheet layer; 2. a second slice layer; 3. a third slice layer; 10. a three-dimensional printing device; 11. an X-axis moving mechanism; 12. a Y-axis moving mechanism; 13. a printing platform; 14. a printhead assembly; 15. a print head rotating mechanism; 20. a three-dimensional printing device; 21. an X-axis moving mechanism; 22. a Y-axis moving mechanism; 23. a printing platform; 24. a printhead assembly.
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.
As shown in fig. 1a to 1c, the embodiment of the present application discloses a structure and a printing process of a three-dimensional printing apparatus 10.
Fig. 1a to 1c are schematic diagrams illustrating a printing state of a three-dimensional printing apparatus 10 corresponding to three different sliced layers, specifically, the three-dimensional printing apparatus 10 includes an X-axis moving mechanism 11, a Y-axis moving mechanism 12, a Z-axis moving mechanism (not shown in the figure), a printing platform 13, a printhead assembly 14, and a printhead rotating mechanism 15. The printhead assembly 14 is movably disposed on the X-axis moving mechanism 11, and both ends of the X-axis moving mechanism 11 are movably disposed on the Y-axis moving mechanism 12, respectively. The printhead assembly 14 includes at least one inkjet head including at least one nozzle row in which a plurality of nozzles are sequentially arranged in a nozzle row direction to form a nozzle row. In this embodiment, in the printing state shown in fig. 1a, the nozzle row direction of the inkjet head is parallel to the Y-axis moving mechanism 12, the X-axis moving mechanism 11, the Y-axis moving mechanism 12 and the Z-axis moving mechanism drive the printhead assembly 14 to move above the printing platform 13, and the inkjet head on the printhead assembly 14 ejects material to the printing platform 13 during the moving process to form the target three-dimensional object. The print head rotating mechanism 15 is configured to rotate the print head assembly 14 such that the extending direction of the nozzle rows of the inkjet heads on the print head assembly 14 is perpendicular to the scanning printing direction M;
specifically, in this embodiment, fig. 1a shows a schematic diagram of a printing state of the three-dimensional printing apparatus 10 when the first cut sheet layer 1 is printed. Where O1 is a cross section of the first slice layer 1, F1 is an outer frame surrounding the cross section O1, the outer frame F1 is rectangular, two adjacent sides La and Lb of the outer frame F1 are respectively parallel to the X-axis moving mechanism 11 and the Y-axis moving mechanism 12, and the length of La is greater than the length of Lb, the extending direction of the sides Lb is set as a step direction S, and a direction perpendicular to the step direction S is set as a scanning printing direction M. The scanning and printing direction M is a direction in which the inkjet heads on the printhead assembly 14 perform a scanning and printing operation during the movement, and the scanning and printing operation specifically refers to an operation of depositing a material on the printing platform 13 during the movement of the inkjet heads on the printhead assembly 14 along the scanning and printing direction. The step direction S is the direction in which the printhead assembly 14 moves between adjacent scanning and printing operations, and when the nozzle row direction of the inkjet heads on the printhead assembly 14 is perpendicular to the determined scanning and printing direction M as shown in fig. 1a, the printhead assembly 14 performs printing according to the determined scanning and printing direction M and the step direction S to form the first cut layer 1 without rotating the printhead assembly 14.
Fig. 1b shows a schematic view of the printing state of the three-dimensional printing device 10 when printing the second sliced layer 2. Where O2 is a cross section of the second sliced layer 2, F2 is an outer frame surrounding the cross section O2, the outer frame F2 is rectangular, two adjacent sides La and Lb of the outer frame F2 are parallel to the Y-axis moving mechanism 12 and the X-axis moving mechanism 11, respectively, and the length of La is greater than the length of Lb, the extending direction of the side Lb is set to be the step direction S in the second sliced layer 2, the direction perpendicular to the step direction S is set to be the scanning printing direction M, and as shown in fig. 1b, the printhead assembly 14 is rotated by 90 degrees by the printhead rotating mechanism 15 so that the extending direction of the nozzle rows of the inkjet heads on the printhead assembly 14 is perpendicular to the determined scanning printing direction M, and the rotated printhead assembly 14 performs printing in accordance with the determined scanning printing direction M and step direction S to form the second sliced layer 2.
Fig. 1c shows a schematic view of the printing state of the three-dimensional printing apparatus 10 when the third sliced layer 3 is printed. Where O3 is a cross section of the third sliced layer 3, F3 is an outer frame surrounding the cross section O3, the outer frame F3 is rectangular, two adjacent sides La and Lb of the outer frame F3 are not parallel to the Y-axis moving mechanism 12 and the X-axis moving mechanism 11, where La is longer than Lb, the extending direction of the side Lb is set to be the stepping direction S in the third sliced layer 3, the direction perpendicular to the stepping direction S is set to be the scanning printing direction M, and the printhead assembly 14 is rotated by the printhead rotating mechanism 15 as shown in fig. 1c, so that the nozzle row direction of the inkjet head on the printhead assembly 14 is perpendicular to the determined scanning printing direction M, and the rotated printhead assembly 14 performs printing according to the determined scanning printing direction M and stepping direction S to form the third sliced layer 3.
More specifically, the three-dimensional printing apparatus as described above performs printing based on the print data generated by the control data generation unit, the print data including the movement data of the X-axis movement mechanism 11, the Y-axis movement mechanism 12, and the Z-axis movement mechanism, the print head deposition data, and the print head rotation angle data. Among them, the movement data of the X-axis moving mechanism 11 and the Y-axis moving mechanism are used to control the printhead assembly 14 and the printing table 13 to move in the scanning printing direction M to perform the scanning printing operation, and to move in the stepping direction S between adjacent scanning printing operations to perform the stepping operation. The printhead rotation angle data is used to control rotation of the printhead assembly 14 such that the direction in which the rows of orifices of the inkjet heads on the printhead assembly 14 extend is perpendicular to the scanning print direction M, the movement data of the Z-axis movement mechanism is used to control movement of the printhead assembly 14 and the print platform 13 in a direction perpendicular to the plane defined by the scanning print direction M and the stepping direction S to stack a plurality of layers in that direction, and the printhead deposition data is used to control the inkjet heads on the printhead assembly 14 to deposit material onto the print platform during a scanning print operation to form a three-dimensional object.
It should be noted that, in the present application, the movement data of the X-axis movement mechanism 11, the movement data of the Y-axis movement mechanism 12, and the scanning print direction M and the step direction S determined for each slice layer are related. Wherein the movement data includes a movement speed, a movement direction, and a movement amount, and the movement data is data of a movement of a movable member mounted on a corresponding movement mechanism driven by the movement mechanism. Specifically, in the printing state shown in fig. 1a, the movement data of the X-axis movement mechanism 11, i.e., the movement data of the head assembly 14 in the scanning printing direction M, and the movement data of the Y-axis movement mechanism 12, i.e., the movement data of the head assembly 14 in the stepping direction S. In the printing state shown in fig. 1b, the movement data of the Y-axis moving mechanism 12, i.e., the movement data of the head assembly 14 in the scanning direction M, and the movement data of the X-axis moving mechanism, i.e., the movement data of the head assembly 14 in the stepping direction S. In the printing state shown in fig. 1c, the movement of the print head assembly 14 in the scanning and printing direction M needs to be realized by the linkage of the X-axis moving mechanism 11 and the Y-axis moving mechanism 12, that is, the print head assembly 14 needs to be moved along the X-axis moving mechanism 11 and the Y-axis moving mechanism 12 simultaneously, for example, when the moving speed of the print head assembly 14 in the scanning and printing direction M is V and the included angle between the scanning and printing direction M and the X-axis moving mechanism 11 is θ, the moving speed of the print head assembly 14 along the X-axis moving mechanism 11 needs to be Vcos θ, and the moving speed of the print head assembly 14 along the Y-axis moving mechanism 12 needs to be Vsin θ to realize the movement of the print head assembly 14 in the scanning and printing direction M to execute the scanning and printing operation, and when the stepping operation is executed between the adjacent scanning and printing operations, when the predetermined distance of stepping in the stepping direction S is d, it is necessary to move the X-axis moving mechanism 11 and the head assembly 14 by d/cos θ along the Y-axis moving mechanism.
As described above, in the three-dimensional printing apparatus 10, the printhead assembly 14 is rotated by the printhead rotation assembly 15 according to the scanning printing direction M and the stepping direction S respectively determined by the outer frame of the cross-sectional shape of each sliced layer, and by setting the extending direction of the shortest side Lb of the outer frame as the stepping direction S, the number of times of the scanning printing operation performed by the sliced layer, that is, the number of times of acceleration and deceleration when the printhead assembly 14 performs the scanning printing operation, that is, by setting the extending direction of the shortest side Lb of the outer frame of the cross-sectional shape as the stepping direction, the time for the printhead assembly 14 to move in the non-printing region is reduced to improve the printing efficiency.
The present application discloses another specific embodiment, as shown in fig. 2a to 2c, which is a schematic diagram of a printing state of the three-dimensional printing apparatus 20 corresponding to three different slice layers. Specifically, the three-dimensional printing apparatus 20 includes an X-axis moving mechanism 21, a Y-axis moving mechanism 22, a Z-axis moving mechanism (not shown), a printing platform 23, a printhead assembly 24, and a printing platform rotating mechanism (not shown). The print head assembly 24 is movably disposed on the X-axis moving mechanism 21, two ends of the X-axis moving mechanism 21 are respectively movably disposed on the Y-axis moving mechanism 22, and the print head assembly 24 includes at least one inkjet head including at least one nozzle row in which a plurality of nozzles are arranged at a time in a nozzle row direction to form a nozzle row. In this embodiment, in the printing state shown in fig. 2a, the nozzle row direction of the inkjet head is parallel to the Y-axis moving mechanism 22, the X-axis moving mechanism 21, the Y-axis moving mechanism 22 and the Z-axis moving mechanism drive the printhead assembly 24 to move above the printing platform 23, and the inkjet head on the printhead assembly 24 ejects material to the printing platform 23 during the moving process to form the target three-dimensional object. The printing platform rotating mechanism is used for rotating the printing platform 23 so that the extending direction of the nozzle row of the inkjet head on the printhead assembly 24 is perpendicular to the scanning printing direction M.
Specifically, in the present embodiment, fig. 2a shows a schematic diagram of a printing state of the three-dimensional printing apparatus 20 when the first cut sheet layer 1 is printed. Where O1 is a cross section of the first slice layer 1, F1 is an outer frame surrounding the cross section O1, the outer frame F1 is rectangular, two adjacent sides La and Lb of the outer frame F1 are respectively parallel to the X-axis moving mechanism 21 and the Y-axis moving mechanism 22, and the length of La is greater than the length of Lb, the extending direction of the sides Lb is set as the step direction S, and the direction perpendicular to the step direction S is set as the scanning and printing direction M. Here, the scanning printing direction M is a direction in which the inkjet head on the printhead assembly 24 performs a scanning printing operation during the movement, the scanning printing operation specifically refers to an operation of depositing a material on the printing platform 23 during the movement of the inkjet head on the printhead assembly 24 along the scanning printing direction, and the step direction S is a direction in which the printhead assembly 24 moves between adjacent scanning printing operations, at this time, as shown in fig. 2a, a nozzle row direction of the inkjet head on the printhead assembly 24 is perpendicular to the determined scanning printing direction M, so that the printhead assembly 24 performs printing according to the determined scanning printing direction M and the step direction S without rotating the printing platform 23 to form the first slice layer 1.
Fig. 2b shows a schematic view of the printing state of the three-dimensional printing device 20 when the second sliced layer 2 is printed. Where O2 is a cross section of the second sliced layer 2, F2 is an outer frame surrounding the cross section O2, the outer frame F2 is rectangular, two adjacent sides La and Lb of the outer frame F2 are parallel to the Y-axis moving mechanism 22 and the X-axis moving mechanism 21, respectively, and the length of La is greater than the length of Lb, the extending direction of the side Lb is set to the step direction S in the second sliced layer 2, the direction perpendicular to the step direction S is set to the scanning print direction M, and the printing platform 23 is rotated by 90 degrees by the printing platform rotating mechanism as shown in fig. 2b, so that the nozzle row direction of the inkjet head on the printhead assembly 14 is perpendicular to the determined scanning print direction M, and the printhead assembly 24 performs printing on the rotated printing platform 23 in accordance with the determined scanning print direction M and step direction S to form the second sliced layer 2.
Fig. 2c is a schematic diagram showing a printing state of the three-dimensional printing device 20 when the third sliced layer 3 is printed. Where O3 is a cross section of the third sliced layer 3, F3 is an outer frame surrounding the cross section O3, the outer frame F3 is rectangular, two adjacent sides La and Lb of the outer frame F3 are not parallel to the Y-axis moving mechanism 22 and the X-axis moving mechanism 21, where La is longer than Lb, the extending direction of the side Lb is set to be the stepping direction S in the third sliced layer 3, the direction perpendicular to the stepping direction S is set to be the scanning printing direction M, and the printing platform 23 is rotated by the printing platform rotating mechanism as shown in fig. 2c, so that the nozzle row direction of the inkjet head on the printhead assembly 24 is perpendicular to the determined scanning printing direction M, and the printhead assembly 24 performs printing on the rotated printing platform 23 according to the determined scanning printing direction M and stepping direction S to form the third sliced layer 3.
In the present embodiment, in order to facilitate the rotation of the printing platform 23, the printing platform 23 is provided in a circular shape.
More specifically, the three-dimensional printing apparatus as described above also performs printing based on the print data generated by the control data generation unit, and the print data in this embodiment is different from the print data in the first embodiment in that the print data does not include the print head rotation angle data, but includes the printing platform rotation angle data, that is, the present embodiment rotates the printing platform 23 so that the determined scanning printing direction M is perpendicular to the extending direction of the nozzle row of the inkjet head on the print head assembly 24. In addition, in the embodiment, after the printing platform 23 rotates, the scanning and printing direction M is always parallel to the extending direction of the X-axis moving mechanism 11, that is, in the printing state shown in fig. 2a-2c, the movement data of the X-axis moving mechanism 11 is the movement data of the printhead assembly 14 in the scanning direction M, and the movement data of the Y-axis moving mechanism 12 is the movement data of the printhead assembly 14 in the stepping direction S.
As described above, in the three-dimensional printing apparatus 20, the printing table 23 is rotated by the printing table rotating mechanism according to the scanning printing direction M and the stepping direction S respectively determined by the outer frame of the cross-sectional shape of each sliced layer, and by setting the extending direction of the shortest side Lb of the outer frame as the stepping direction S, the number of times of the scanning printing operation performed by the sliced layer, that is, the number of times of acceleration and deceleration when the printhead assembly 14 performs the scanning printing operation, that is, by setting the extending direction of the shortest side Lb of the outer frame of the cross-sectional shape as the stepping direction, the time for the printhead assembly 14 to move in the non-printing region is reduced to improve the printing efficiency.
The application also discloses a three-printing method, which comprises the following steps:
as shown in fig. 3, the present application discloses a three-dimensional printing method, including the steps of:
and S1, slicing the three-dimensional model of the three-dimensional object to be printed, and generating slice data, wherein the slice data comprises the section shape information of each slice layer of the three-dimensional object to be printed.
And S2, determining an outer frame surrounding the section of each slice layer according to the section shape information of each slice layer.
And S3, determining the scanning printing direction and the stepping direction of each slice layer according to the outer frame of the section of each slice layer.
The step direction is the extending direction of the shortest side of the outer frame, and the scanning and printing direction is the direction perpendicular to the step direction.
And S4, generating the printing data of each sliced layer according to the section shape information, the scanning printing direction and the stepping direction of each sliced layer.
The printing data comprises printing head rotation angle data, printing platform rotation angle data, first direction moving mechanisms, second direction moving mechanisms, third direction moving mechanisms and printing head deposition data. The printing head rotation angle data is used for controlling the printing head to rotate, so that the extending direction of the nozzle hole rows on the printing head is perpendicular to the scanning printing direction; the printing platform rotation angle data is used for controlling the printing platform to rotate, so that the scanning printing direction is perpendicular to the extending direction of the spray hole rows on the printing head; the movement data of the first direction moving mechanism and the second direction moving mechanism are used for controlling the printing head and the printing platform to move along the scanning printing direction to execute scanning printing operation, and move along the stepping direction between the adjacent scanning printing operation to execute stepping operation; the movement data of the third direction moving mechanism is used for controlling the printing head and the printing platform to move along the direction which is vertical to the plane determined by the scanning printing direction and the stepping direction; the print head deposition data is used to control the print head to deposit material onto the print platform to form the three-dimensional object during a scanning printing operation.
And S5, forming a plurality of printing layers according to the printing data of each sliced layer, wherein the printing layers are superposed to form the three-dimensional object to be printed.
Specifically, slicing the three-dimensional model of the three-dimensional object to be printed and generating slice data includes: determining the slicing direction of the three-dimensional model; judging whether a supporting structure for supporting the three-dimensional model for printing needs to be generated or not; and when the judgment result is negative, directly slicing the three-dimensional model along the determined slicing direction. When the determination result is yes, a support structure for supporting the three-dimensional model for printing is generated in accordance with the determined slice direction, and then the three-dimensional model in which the support structure is generated is sliced in the determined slice direction to generate slice DATA.
Wherein the slicing comprises dividing the three-dimensional model of the three-dimensional object to be printed into a plurality of layers along the determined slicing direction, wherein each layer can have a predetermined same thickness, and the thickness of each layer can be adaptively determined according to the shape of the three-dimensional model, namely the thickness of each layer is related to the shape of the three-dimensional model.
More specifically, the slicing direction of the three-dimensional model may be determined according to the needs of the user, e.g., the user may need to complete the printing of the three-dimensional object in as short a time as possible, or the user may need to make the volume of the support structure as small as possible to reduce waste of material.
Based on the above requirements, determining the slice direction of the three-dimensional model comprises: the method comprises the steps of determining a minimum volume wrapping box surrounding a three-dimensional model according to the three-dimensional model, determining the extending direction of the shortest side of the determined minimum volume wrapping box as the slicing direction of the three-dimensional model, wherein the determined slicing direction can shorten the time required for printing the three-dimensional object, or rotating the three-dimensional model in a three-dimensional space, determining the placement mode of the support structure with the minimum volume for supporting the three-dimensional model to print, determining the direction vertical to the horizontal plane in the placement mode as the slicing direction of the three-dimensional model, and determining the slicing direction so that the using amount of support materials is minimum to reduce the waste of materials.
The method comprises the steps of placing a three-dimensional model in an XYZ three-dimensional coordinate system, respectively determining the maximum value and the minimum value of the three-dimensional model on an X axis, a Y axis and a Z axis, finding points (Xmin, Ymin, Zmin), (Xmin, Ymax, Zmin), (Xmax, Ymin, Zmax), (Xmin, Ymax, Zmax), (Xmax, Ymin, Zmax), and determining the minimum volume skin box of the three-dimensional model by taking the eight points as the vertexes of the skin box.
A method of determining a bounding box surrounding a cross section of each sliced layer based on the information on the shape of the cross section of each sliced layer will be described in detail with reference to fig. 4 to 6, in which fig. 4 illustrates a method of determining a bounding box, fig. 5 illustrates another method of determining a bounding box, and fig. 6 illustrates still another method of determining a bounding box.
Specifically, as shown in fig. 4, the method for determining the outer frame surrounding the cross section of each sliced layer includes the following steps:
s11. the section O of the sliced layer is placed in a two-dimensional coordinate system XOY, where the X-axis and Y-axis of the two-dimensional coordinate system correspond to the X-axis moving mechanism 11 and Y-axis moving mechanism 12 of the above-described embodiment, respectively.
S12, determining a coordinate minimum value Xmin and a coordinate maximum value Xmax of the section O of the sliced layer on the X axis and a coordinate minimum value Ymin and a coordinate maximum value Ymax of the section O on the Y axis.
S13, finding out points H (Xmin, Ymin), I (Xmax, Ymin), J (Xmax, Ymax) and K (Xmin, Ymax).
S14, sequentially connecting the points H, I, J, K to form the outer frame F.
In the method as described above, since the connection line HI and the connection JK are always parallel to the X axis, the connection line KH and the connection IJ are always parallel to the Y axis, that is, the side of the outer frame F is always parallel to the X axis or the Y axis, that is, the shortest side Lb of the outer frame F is either parallel to the X axis or parallel to the Y axis, that is, the scanning and printing direction M is a direction parallel to the X axis or a direction parallel to the Y axis, and the print head rotation angle data and the print platform rotation angle data in the first and second embodiments are data such that the extending direction of the nozzle rows of the inkjet heads on the print head assembly 14 is perpendicular to the scanning and printing direction M (that is, the long side La of the outer frame), that is, the print head rotation angle data and the print platform rotation angle data are related to the extending direction of the long side La of the outer frame F. For example, the long side La of the outer frame F determined based on the method shown in fig. 4 may be perpendicular to the X axis or parallel to the X axis, if the initial extending direction of the nozzle rows of the inkjet heads on the printhead assembly 14 is perpendicular to the X axis moving mechanism 11, the printhead rotation angle data or the platen rotation angle data is 0 degree when the extending direction of the long side La of the outer frame F is parallel to the X axis, and the printhead rotation angle data is 90 degrees clockwise or 90 degrees counterclockwise when the extending direction of the long side La of the outer frame F is perpendicular to the X axis, or the platen rotation angle data is 90 degrees clockwise or 90 degrees counterclockwise.
However, as shown in fig. 4, the outline frame F determined by the method for determining an outline frame still has a large blank area, i.e., an area outside the outline of the cross-sectional shape of the sliced layer, and the blank area corresponds to an invalid printing area during printing.
Specifically, as shown in fig. 5, another method for determining an outline includes the following steps:
s21. the section O of the sliced layer is placed in a two-dimensional coordinate system XOY, where the X-axis and Y-axis of the two-dimensional coordinate system correspond to the X-axis moving mechanism 11 and the Y-axis moving mechanism 12 of the above-described embodiment, respectively.
S22, two points A and B which are farthest away on the outline of the section O of each sliced layer are searched and connected.
And S23, finding out farthest points C and D which are far away from the connecting line AB on two sides of the connecting line between the points A and B respectively.
S24, taking a point A, B, C, D as a tangent point to obtain circumscribed lines L1, L2, L3 and L4 of the cross section;
and S25, four intersection points H, I, J, K of the external tangent lines L1, L2, L3 and L4 are sequentially connected to form an outer frame F.
In the method for determining the outline shown in fig. 5, the extending direction of each side of the outline F may have an oblique angle with respect to the X axis and the Y axis, while the print head rotation angle data and the print platform rotation angle data in the first and second embodiments are data that make the extending direction of the nozzle rows of the inkjet heads on the print head assembly 14 perpendicular to the scanning printing direction M (i.e., the long side La of the outline), that is, the print head rotation angle data and the print platform rotation angle data are related to the extending direction of the long side La of the outline F, and similarly, the print head rotation angle data and the print platform rotation angle data are the oblique angle between the extending direction of the long side La of the outline F and the X axis, which are rotated clockwise or counterclockwise. The outline determination method shown in fig. 5 has a reduced blank area and a reduced length of the shortest side compared to the outline determination method shown in fig. 4, i.e., when determining the outline based on the outline determination method shown in fig. 5, it is possible to further reduce the number of times of performing the scan printing operation and reduce the area of the invalid printing area, thereby further improving the printing efficiency.
In a specific implementation process, the cross-sectional shape of the sliced layer may be irregular, and if the outline of the cross-sectional shape is determined only according to the method shown in fig. 4 or 5, a large blank area may be formed between the outline of the outline and the cross-sectional shape, which may limit further improvement of printing efficiency, as shown in fig. 6, another method for determining the outline specifically includes the following steps:
s31, dividing the cross section O into sub-regions A, B, C, wherein the dividing number and method of the sub-regions can be determined according to the specific shape of the cross section.
S32. a plurality of sub-outer borders F' are determined in each sub-area A, B, C, respectively, according to the method shown in fig. 4 and/or the method shown in fig. 5.
S33, determining the outer frame F of the section O based on the plurality of sub-outer frames F ', and specifically, sequentially connecting the vertexes of the plurality of sub-outer frames F' to obtain the outer frame F of the section O.
When the outline is determined according to the outline determining method shown in fig. 6, the invalid printing area can be reduced as much as possible to improve the printing efficiency.
Correspondingly, the present application also discloses a three-dimensional printing system, which is configured to execute the three-dimensional printing method, and as shown in fig. 7, the system includes: a slicing unit 100, an outer frame determining unit 200, a direction determining unit 300, a print data generating unit 400, and a print layer forming unit 500.
The slicing unit 100 is configured to slice a three-dimensional model of a three-dimensional object to be printed, and generate slice data, where the slice data includes cross-sectional shape information of each slice layer of the three-dimensional object to be printed.
And an outline determining unit 200 for determining an outline surrounding the cross section of each slice layer according to the cross-sectional shape information of each slice layer.
The direction determining unit 300 is configured to determine a scanning and printing direction and a stepping direction of each slice layer according to an outer frame of a cross section of each slice layer, where the stepping direction is an extending direction of a shortest side of the outer frame, and the scanning and printing direction is a direction perpendicular to the stepping direction.
And a print data generating unit 400 configured to generate print data for each sliced layer according to the cross-sectional shape information, the scanning print direction, and the stepping direction of each sliced layer.
And a printing layer forming unit 500, configured to form a plurality of printing layers according to the printing data of each sliced layer, where the plurality of printing layers are stacked to form the three-dimensional object to be printed.
The slicing unit 100 comprises a slicing direction determining unit, a judging unit and a supporting structure generating and slicing subunit; the slicing direction determining unit is used for determining the slicing direction of the three-dimensional model; the judging unit is used for judging whether a supporting structure for supporting the three-dimensional model for printing needs to be generated or not; the supporting structure generating and slicing subunit is used for generating a supporting structure for supporting the three-dimensional model for printing according to the determined slicing direction when the judgment result of the judging unit is yes, and then slicing the three-dimensional model with the supporting structure along the determined slicing direction; and when the judgment result of the judgment unit is negative, directly slicing the three-dimensional model along the determined slicing direction.
. Further, the slicing direction determining unit is used for determining a minimum volume bounding box surrounding the three-dimensional model according to the three-dimensional model, and taking the extending direction of the shortest side of the minimum volume bounding box as the slicing direction of the three-dimensional model; or, the three-dimensional model is rotated, the placing mode with the smallest volume of the supporting structure for supporting the three-dimensional model for printing is determined, and the direction perpendicular to the horizontal plane in the placing mode with the smallest volume is taken as the slicing direction of the three-dimensional model.
In the present embodiment, the outline determining unit 200 includes a first setting unit, a first determining sub-unit, and a first outline determining sub-unit. The first setting unit is used for placing each slice layer in a two-dimensional coordinate system, and the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other; the first determining subunit is used for determining a coordinate minimum value Xmin and a coordinate maximum value Xmax of the cross section of each sliced layer on the X axis and a coordinate minimum value Ymin and a coordinate maximum value Ymax of the cross section of each sliced layer on the Y axis; the first outer frame determining subunit is used for sequentially connecting the coordinate point (Xmin, Ymin), the coordinate point (Xmax, Ymax), the coordinate point (Xmin, Ymax) and the coordinate point (Xmin, Ymin), so as to obtain an outer frame of the cross section of each sliced layer.
In another embodiment, the outline determining unit 200 includes a second setting unit, a second determining subunit, a third determining subunit, a circumscribed line generating unit, and a second outline determining subunit. The second setting unit is used for placing each slice layer in a two-dimensional coordinate system, and the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other; the second determining subunit is used for determining two points with the farthest distance on the cross-sectional profile of each slice layer according to the cross-sectional shape of each slice layer and connecting the two points; the third determining subunit is used for finding out points farthest away from the connecting line on two sides of the connecting line between the farthest points respectively; the outer tangent generating unit is used for taking the two farthest points on the cross section outline of each sliced layer and the two farthest points away from the connecting line as tangent points to obtain a plurality of outer tangents of the cross section of each sliced layer; the second outer frame determining subunit is used for determining an outer frame of the cross section of each sliced layer according to the plurality of outer tangent lines.
In another embodiment, the outer frame determining unit 200 includes an area dividing unit, a sub-outer frame determining unit, and a third outer frame determining sub-unit. The region dividing unit is used for dividing the cross section of each sliced layer into a plurality of regions; the sub-outline determining unit is used for determining a corresponding sub-outline in each area. The third outer frame determining subunit is configured to determine an outer frame of the cross section of each sliced layer according to the plurality of sub-outer frames.
Correspondingly, the application also discloses a storage medium, which comprises a stored program, wherein when the program runs, the device where the storage medium is located is controlled to execute the following steps:
slicing a three-dimensional model of a three-dimensional object to be printed to generate slice data, wherein the slice data comprises section shape information of each slice layer of the three-dimensional object to be printed; determining an outer frame surrounding the section of each slice layer according to the section shape information of each slice layer; determining the scanning and printing direction and the stepping direction of each sliced layer according to the outer frame of the section of each sliced layer; generating printing data of each sliced layer according to the cross-sectional shape information, the scanning printing direction and the stepping direction of each sliced layer; and forming a plurality of printing layers according to the printing data of each slicing layer, wherein the plurality of printing layers are superposed to form the three-dimensional object to be printed.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (9)

1. A three-dimensional printing method, comprising:
slicing a three-dimensional model of a three-dimensional object to be printed to generate slice data, wherein the slice data comprises section shape information of each slice layer of the three-dimensional object to be printed;
determining an outer frame surrounding the section of each slice layer according to the section shape information of each slice layer;
determining a scanning and printing direction and a stepping direction of each cut sheet layer according to an outer frame of the section of each cut sheet layer, wherein the stepping direction is the extending direction of the shortest side of the outer frame, and the scanning and printing direction is the direction perpendicular to the stepping direction;
generating printing data of each sliced layer according to the cross-sectional shape information, the scanning printing direction and the stepping direction of each sliced layer;
forming a plurality of printing layers according to the printing data of each slicing layer, wherein the plurality of printing layers are overlapped to form the three-dimensional object to be printed;
the printing data comprises printing head rotation angle data or printing platform rotation angle data and movement data of a first direction moving mechanism and a second direction moving mechanism, the printing head rotation angle data is used for controlling the rotation of a printing head, the printing platform rotation angle data is used for controlling the rotation of the printing platform, so that the extending direction of a nozzle row on the printing head is perpendicular to the scanning printing direction and is parallel to the stepping direction, and the movement data of the first direction moving mechanism and the second direction moving mechanism is used for controlling the printing head or the printing platform to move along the scanning printing direction to execute scanning printing operation and move along the stepping direction between the adjacent scanning printing operations to execute stepping operation.
2. The method of claim 1, wherein slicing a three-dimensional model of a three-dimensional object to be printed, generating slice data comprises:
determining a slice direction of the three-dimensional model;
judging whether a supporting structure for supporting the three-dimensional model to be printed needs to be generated or not;
if so, generating a support structure for supporting the three-dimensional model for printing according to the slicing direction, and then slicing the three-dimensional model with the support structure along the determined slicing direction;
and when the judgment result is negative, slicing the three-dimensional model along the determined slicing direction.
3. The method of claim 2, wherein determining the slice direction of the three-dimensional model comprises:
determining a minimum volume bounding box surrounding the three-dimensional model according to the three-dimensional model, and taking the extension direction of the shortest side of the minimum volume bounding box as the slicing direction of the three-dimensional model;
or,
and rotating the three-dimensional model, determining a placing mode with the smallest volume of a supporting structure for supporting the three-dimensional model for printing, and taking the direction vertical to a horizontal plane in the placing mode with the smallest volume as the slicing direction of the three-dimensional model.
4. The method of claim 1, wherein determining an outer frame surrounding a cross section of each of the sliced layers according to the cross-sectional shape information of each of the sliced layers comprises:
placing each slice layer in a two-dimensional coordinate system, wherein the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other;
determining a coordinate minimum value Xmin and a coordinate maximum value Xmax of the cross section of each sliced layer on an X axis and a coordinate minimum value Ymin and a coordinate maximum value Ymax of the cross section on a Y axis;
and sequentially connecting the coordinate point (Xmin, Ymin), the coordinate point (Xmax, Ymax), the coordinate point (Xmin, Ymax) and the coordinate point (Xmin, Ymin) to obtain an outer frame of the cross section of each sliced layer.
5. The method of claim 1, wherein determining an outer frame surrounding a cross section of each of the sliced layers according to the cross-sectional shape information of each of the sliced layers comprises:
placing each slice layer in a two-dimensional coordinate system, wherein the two-dimensional coordinate system comprises an X axis and a Y axis which are perpendicular to each other;
determining two points which are farthest away on the cross-sectional profile of each sliced layer according to the cross-sectional shape of each sliced layer, and connecting the two points;
finding out points farthest away from the connecting line on two sides of the connecting line between the farthest points;
taking two points which are farthest on the cross section outline of each sliced layer and two points which are farthest from the connecting line as tangent points to obtain a plurality of external tangents of the cross section of each sliced layer;
and determining an outer frame of the section of each sliced layer according to the plurality of outer tangents.
6. The method of claim 1, wherein determining an outer frame surrounding a cross section of each of the sliced layers according to the cross-sectional shape information of each of the sliced layers comprises:
dividing the cross section of each sliced layer into a plurality of areas;
determining a respective sub-outline in each of said regions;
and determining an outer frame of the section of each sliced layer according to the plurality of sub-outer frames.
7. The method of claim 1, wherein the print data further comprises movement data of a third directional movement mechanism and printhead deposit data;
the movement data of the third direction moving mechanism is used for controlling the printing head or the printing platform to move along the direction perpendicular to the plane determined by the scanning printing direction and the stepping direction;
the print head deposition data is used to control the print head to deposit material to the print platform during the scanning printing operation to form the three-dimensional object.
8. A three-dimensional printing system, comprising:
a slicing unit for slicing the three-dimensional model of the three-dimensional object to be printed to generate slice data,
the slice data comprises cross-sectional shape information of each slice layer of the three-dimensional object to be printed;
the outline determining unit is used for determining an outline surrounding the section of each sliced layer according to the section shape information of each sliced layer;
the direction determining unit is used for determining the scanning and printing direction and the stepping direction of each cut sheet layer according to an outer frame of the section of each cut sheet layer, wherein the stepping direction is the extending direction of the shortest side of the outer frame, and the scanning and printing direction is the direction perpendicular to the stepping direction;
the printing data generating unit is used for generating the printing data of each sliced layer according to the section shape information, the scanning printing direction and the stepping direction of each sliced layer;
the printing layer forming unit is used for forming a plurality of printing layers according to the printing data of each sliced layer, and the plurality of printing layers are superposed to form the three-dimensional object to be printed;
the printing data comprises printing head rotation angle data or printing platform rotation angle data and movement data of a first direction moving mechanism and a second direction moving mechanism, the printing head rotation angle data is used for controlling the rotation of a printing head, the printing platform rotation angle data is used for controlling the rotation of the printing platform, so that the extending direction of a jet orifice column on the printing head is perpendicular to the scanning printing direction and is parallel to the stepping direction, and the movement data of the first direction moving mechanism and the second direction moving mechanism is used for controlling the printing head or the printing platform to move along the scanning printing direction so as to execute scanning printing operation and move along the stepping direction between the adjacent scanning printing operations to execute the stepping operation.
9. A storage medium comprising a stored program, wherein the program when executed controls an apparatus in which the storage medium is located to perform the three-dimensional printing method of any one of claims 1-7.
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110328840B (en) * 2019-07-11 2021-08-10 珠海赛纳三维科技有限公司 Three-dimensional printing method, system and storage medium
CN110815825B (en) * 2019-11-15 2021-06-04 珠海赛纳三维科技有限公司 Printing method of 3D object slice layer, printing method of 3D object and printing device
CN110978502A (en) * 2019-12-30 2020-04-10 深圳市纵维立方科技有限公司 Device and method for rapid photocuring 3D printing
CN112078129B (en) * 2020-09-08 2022-05-17 鑫精合激光科技发展（北京）有限公司 Part printing method and system, terminal equipment and computer storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984138A (en) * 2015-01-27 2016-10-05 常州市东科电子科技有限公司 Single-face forming method of clothing and 3D printing device
CN107570663A (en) * 2017-09-15 2018-01-12 杭州喜马拉雅信息科技有限公司 A kind of the sand mold printing equipment and method of the different aperture nozzle of double shower nozzles

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07329190A (en) * 1994-06-14 1995-12-19 Asahi Chem Ind Co Ltd Manufacture of 3-dimensional object and manufacturing equipment
GB2378150A (en) * 2001-07-31 2003-02-05 Dtm Corp Fabricating a three-dimensional article from powder
CN104890238B (en) * 2015-04-30 2017-05-24 北京敏速自动控制设备有限公司 Three-dimensional printing method and system thereof
CN107914397B (en) * 2016-10-09 2020-02-28 珠海赛纳打印科技股份有限公司 3D object area-specific printing method and device
CN107716856B (en) * 2017-09-15 2019-05-07 浙江大学 A kind of parallel printing equipment of sand mo(u)ld and method of the different aperture nozzle of double spray heads
CN110328840B (en) * 2019-07-11 2021-08-10 珠海赛纳三维科技有限公司 Three-dimensional printing method, system and storage medium
CN110920051A (en) * 2019-11-20 2020-03-27 江苏华疆三维科技有限公司 Automobile 3D printing track optimization method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984138A (en) * 2015-01-27 2016-10-05 常州市东科电子科技有限公司 Single-face forming method of clothing and 3D printing device
CN107570663A (en) * 2017-09-15 2018-01-12 杭州喜马拉雅信息科技有限公司 A kind of the sand mold printing equipment and method of the different aperture nozzle of double shower nozzles

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