CN115339110B

CN115339110B - Anti-fracture 3D printing method and device, electronic equipment and storage medium

Info

Publication number: CN115339110B
Application number: CN202211269734.0A
Authority: CN
Inventors: 王君衡; 阎海军; 吴爵盛; 许育明
Original assignee: Guangdong Zhongliding Intelligent Technology Co ltd
Current assignee: Guangdong Zhongliding Intelligent Technology Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-01-20
Anticipated expiration: 2042-10-18
Also published as: CN115339110A

Abstract

The application relates to the technical field of three-dimensional forming, and discloses an anti-fracture 3D printing method and device, electronic equipment and a storage medium. The method comprises the following steps: dividing a plurality of plane models into slices of the three-dimensional model along the scanning direction to obtain n layer blocks to be printed; carrying out area division processing on the nozzle arrays of the printing nozzles to obtain m nozzle arrays; generating motion track data according to the contour shape of each plane model; controlling the movement track data of a printing nozzle, carrying out ink-jet printing on the a-th layer block to be printed by using the ith nozzle array, and carrying out ink-jet printing on the a + 1-th layer block to be printed by using the jth nozzle array; wherein i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to m, a is more than or equal to 1 and less than or equal to n, i is not equal to j, and i, j, a, m and n are integers. The risk that the printed product is broken in the scanning direction of the plane model can be effectively reduced.

Description

Anti-fracture 3D printing method and device, electronic equipment and storage medium

Technical Field

The application relates to the technical field of three-dimensional forming, in particular to an anti-fracture 3D printing method and device, electronic equipment and a storage medium.

Background

Generally, a 3D printer shapes an article by adding printing materials to a substrate in an incremental manner, and after the 3D printer is connected to a computer, the printing materials can be stacked layer by layer through computer control, and finally, a blueprint on the computer is changed into a real object.

When actually printing, the printing process generally can not stop, when some nozzles of the printing head are blocked, the blocked nozzles repeatedly operate in the same vertical direction, so that the vertical direction corresponding to the blocked nozzles does not eject printing materials any more, and finally, the printed product has the risk of fracture along the scanning direction.

Disclosure of Invention

The application aims to provide an anti-fracture 3D printing method and device, electronic equipment and a storage medium, and aims to reduce the fracture risk of a 3D printed product along the scanning direction.

In a first aspect, a fracture prevention 3D printing method is provided, including:

dividing a plurality of plane models into slices of the three-dimensional model along the scanning direction to obtain n layer blocks to be printed;

carrying out area division processing on the nozzle arrays of the printing nozzles to obtain m nozzle arrays;

generating motion trajectory data according to the contour shape of each plane model;

controlling the printing nozzle to operate the motion track data, performing inkjet printing on the a-th layer block to be printed by using the ith nozzle array, and performing inkjet printing on the a + 1-th layer block to be printed by using the jth nozzle array; wherein i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to m, a is more than or equal to 1 and less than or equal to n, i is not equal to j, m is the number of the nozzle arrays, n is the number of the layer blocks to be printed, and i, j, a, m and n are integers.

In some embodiments, the block to be printed includes at least one layer of the planar model, and the nozzle arrays are at least two groups.

In some embodiments, the generating motion trajectory data according to the contour shape of each of the planar models includes:

judging whether an area in the outline range of the plane model is an effective printing area or not;

if yes, generating a plurality of groups of first motion tracks along a first plane direction in the range of the effective printing area;

if not, generating a second motion track along a second plane direction;

the effective printing area is an area needing ink jet printing, the first plane direction and the second plane direction are perpendicular to each other, the printing range covered by the spray head array when the spray head array moves along the first motion track is not smaller than the area range of the effective printing area, and the second motion track connects two adjacent effective printing areas.

In some embodiments, the controlling the printing nozzles to run the motion trajectory data, performing inkjet printing on the a-th layer block to be printed by using the ith nozzle array, and performing inkjet printing on the a + 1-th layer block to be printed by using the jth nozzle array includes:

determining a second spray head array based on the first spray head array; the first spray head array is used for printing the previous layer block to be printed, and the second spray head array is used for printing the current layer block to be printed;

calculating the distance between the first spray head array and the second spray head array to obtain a displacement distance;

and performing compensation calculation on the motion trajectory data based on the displacement distance, controlling the motion trajectory data after the printing spray heads operate and compensate, and performing ink-jet printing on the current layer block to be printed by using the second spray head array.

In some embodiments, one of the showerhead arrays partially coincides with another of the showerhead arrays.

In some embodiments, the fracture-prevention 3D printing method further comprises:

carrying out area division processing on the plane model to obtain o areas to be printed;

controlling the printing nozzle to operate the motion track data, performing ink-jet printing on the b-th to-be-printed area by using the x-th nozzle array, and performing ink-jet printing on the b + 1-th to-be-printed area by using the y-th nozzle array; wherein x is more than or equal to 1 and less than or equal to m, y is more than or equal to 1 and less than or equal to m, b is more than or equal to 1 and less than or equal to o, x is not equal to y, m is the number of the nozzle arrays, o is the number of the areas to be printed, and x, y, b, m and o are integers.

when the number of the layer blocks to be printed reaches a preset printing threshold value, controlling the printing nozzles to run to a test area, and performing ink-jet printing by using each nozzle array to obtain a test layer;

judging whether the spray heads of each spray head array are blocked or not according to the test layer;

and if not, controlling the printing spray head to return to the operation area, operating the motion track data and printing the rest layer blocks to be printed.

In a second aspect, there is provided a fracture prevention 3D printing device, the device comprising:

the first dividing module is used for dividing the plurality of planar models after the three-dimensional model is sliced along the scanning direction to obtain n layer blocks to be printed;

the second division module is used for carrying out regional division processing on the nozzle arrays of the printing nozzles to obtain m nozzle arrays;

the track generation module is used for generating motion track data according to the outline shape of each plane model;

the control module is used for controlling the printing spray head to operate the motion track data, performing ink-jet printing on the a-th layer block to be printed by using the ith spray head array, and performing ink-jet printing on the a + 1-th layer block to be printed by using the jth spray head array; wherein i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to m, a is more than or equal to 1 and less than or equal to n, i is not equal to j, m is the number of the nozzle arrays, n is the number of the layer blocks to be printed, and i, j, a, m and n are integers.

In a third aspect, an electronic device is provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the fracture prevention 3D printing method of the first aspect when executing the computer program.

In a fourth aspect, a computer readable storage medium is provided, which stores a computer program that, when executed by a processor, implements the fracture-prevention 3D printing method of the first aspect.

The beneficial effect of this application: the plane model obtained after slicing and the nozzle array of the printing nozzle are divided, a plurality of layer blocks to be printed and the nozzle array are obtained respectively, when the operation motion track data of the printing nozzle is controlled, the nozzle array which is different from the nozzle array used when the previous layer block to be printed is used for carrying out ink jet printing on the current layer block to be printed, so that the adjacent two layer blocks to be printed respectively use different nozzle arrays to complete ink jet printing, the layer blocks to be printed are prevented from being continuously printed by using the same nozzle array, the continuous empty printing condition is prevented from occurring when part of the nozzles of the nozzle array are blocked, even if part of the nozzles of part of the nozzle array are blocked, the adjacent layer blocks to be printed are printed by using other nozzle arrays, the occurrence probability of the continuous empty printing condition can be reduced, and the risk that the printed products are cracked in the scanning direction of the plane model is effectively reduced.

Drawings

Fig. 1 is a flowchart of a method for fracture-prevention 3D printing according to a first embodiment of the present application;

fig. 2 is a flowchart of step S103 in fig. 1;

FIG. 3 is a schematic diagram of a motion trajectory provided by an embodiment of the present application;

FIG. 4 is a flowchart of step S104 in FIG. 1;

fig. 5 is a flowchart of a method for fracture-prevention 3D printing according to a second embodiment of the present application;

fig. 6 is a flowchart of a method for fracture-prevention 3D printing according to a third embodiment of the present application;

fig. 7 is a schematic structural diagram of a fracture prevention 3D printing apparatus provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in 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.

It should be noted that although functional blocks are partitioned in a schematic diagram of an apparatus and a logical order is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus or the order in the flowchart. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.

3D printing (3 DP): one of the rapid prototyping technologies, also called additive manufacturing, is a technology for constructing an object by using a bondable material such as powdered metal or plastic and printing layer by layer on the basis of a digital model file. 3D printing is typically achieved using digital technology material printers. The 3D printer has the same working principle as a common printer, but the printing materials are different, the printing materials of the common printer are ink and paper, the 3D printer is internally provided with different printing materials such as metal, ceramic, plastic, sand and the like, and the printing materials can be superposed layer by layer under the control of a computer after the printer is connected with the computer, so that the blueprint on the computer is changed into a real object finally. In general, a 3D printer is a device that can "print" a real 3D object, such as a robot, a toy car, various models, even food, etc., and is also called "printer" in common so that the technical principle of a common printer is referred to, because the layering process is very similar to inkjet printing, which is called 3D stereoscopic printing technology.

Based on this, the embodiment of the application provides an anti-fracture 3D printing method and device, an electronic device and a storage medium, and aims to reduce the fracture risk of a 3D printed product along the scanning direction.

The anti-fracture 3D printing method, device, electronic device and storage medium provided in the embodiments of the present application are specifically described in the following embodiments, and first, the anti-fracture 3D printing method in the embodiments of the present application is described.

The embodiment of the application provides an anti-fracture 3D printing method, and relates to the technical field of three-dimensional forming. The anti-fracture 3D printing method provided by the embodiment of the application can be applied to a terminal, a server side and software running in the terminal or the server side. In some embodiments, the terminal may be a smartphone, tablet, laptop, desktop computer, or the like; the server side can be configured into an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, and cloud servers for providing basic cloud computing services such as cloud service, a cloud database, cloud computing, cloud functions, cloud storage, network service, cloud communication, middleware service, domain name service, security service, CDN (content delivery network) and big data and artificial intelligence platforms; the software may be an application or the like that implements a fracture-prevention 3D printing method, but is not limited to the above form.

The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like. The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

In each embodiment of the present application, when data related to the user identity or characteristic, such as user information, user behavior data, user history data, and user location information, is processed, permission or consent of the user is obtained, and the data collection, use, and processing comply with relevant laws and regulations and standards of relevant countries and regions. In addition, when the embodiment of the present application needs to acquire sensitive personal information of a user, individual permission or individual consent of the user is obtained through a pop-up window or a jump to a confirmation page, and after the individual permission or individual consent of the user is definitely obtained, necessary user-related data for enabling the embodiment of the present application to operate normally is acquired.

Fig. 1 is an optional flowchart of a method for fracture-prevention 3D printing according to an embodiment of the present application, where the method in fig. 1 may include, but is not limited to, steps S101 to S104.

Step S101, dividing a plurality of plane models after the three-dimensional model is sliced along a scanning direction to obtain n layer blocks to be printed;

step S102, carrying out area division processing on the nozzle arrays of the printing nozzles to obtain m nozzle arrays;

step S103, generating motion trail data according to the outline shape of each plane model;

step S104, controlling the movement track data of the printing nozzles, performing ink-jet printing on the a-th layer block to be printed by using the ith nozzle array, and performing ink-jet printing on the a + 1-th layer block to be printed by using the jth nozzle array;

wherein i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to m, a is more than or equal to 1 and less than or equal to n, i is not equal to j, m is the number of spray head arrays, n is the number of layer blocks to be printed, and i, j, a, m and n are integers.

It is understood that the scanning direction is a direction in which a plurality of planar models after being sliced are sequentially stacked.

The illustrated steps S101 to S104 in the embodiment of the present application, the planar model obtained after slicing and the nozzle array of the printing nozzle are divided, a plurality of layer blocks to be printed and nozzle arrays are obtained respectively, when the operation motion trajectory data of the printing nozzle is controlled, the nozzle array different from the nozzle array used when the previous layer block to be printed is used to perform inkjet printing on the current layer block to be printed, so that the two adjacent layer blocks to be printed use different nozzle arrays to complete inkjet printing respectively, the layer blocks to be printed are prevented from being continuously printed by using the same nozzle array, thereby avoiding the occurrence of continuous empty printing when part of the nozzles of the nozzle array are blocked, even if part of the nozzles of part of the nozzle array are blocked, the adjacent layer blocks to be printed are printed by using other nozzle arrays, the occurrence probability of the continuous empty printing situation can be reduced, and the risk of the printed product breaking in the scanning direction of the planar model is effectively reduced.

In step S101 of some embodiments, the multiple plane models obtained by slicing the three-dimensional model are divided along the scanning direction, which may be by importing the three-dimensional model into slicing software, scanning coordinates of each point and coordinates of a normal vector in the three-dimensional model, constructing all triangular patches on the model surface through a right-hand rule and a normal vector to complete reconstruction of the three-dimensional model, slicing the reconstructed three-dimensional model to obtain multiple plane models, and dividing each plane model according to a preset division rule to obtain multiple blocks to be printed.

It is understood that the three-dimensional model may be obtained directly from modeling software, or may be obtained directly from a designed three-dimensional model. The types of the three-dimensional model include stl, obj, 3mf, etc., and in a general case, the three-dimensional model is composed of a plurality of triangular mesh patches.

It can be understood that the layer block to be printed includes one or a plurality of continuous planar models, the user can set the planar model setting parameters of the layer block to be printed through the interactive interface, and then the printing device can obtain the corresponding setting result, so as to execute the corresponding division processing according to the setting result.

In step S102 of some embodiments, the area division processing may be performed on the nozzle arrays of the printing nozzles, where the nozzle arrays are divided according to the total number of the nozzles of the printing nozzles, at least two nozzle arrays are divided, a user may set the nozzle array setting parameters of the printing nozzles through an interactive interface, and then the printing device may obtain the corresponding setting result, so as to perform the corresponding division processing according to the setting result. For example, the number of the printing nozzles is 1000, the nozzles are arranged in a column, and the printing nozzles may be divided into 10 nozzle arrays each including 100 nozzles.

In step S103 of some embodiments, the motion trajectory data is generated according to the contour shape of each plane model, where a continuous broken line may be used as a contour line of an edge of the plane model, and an area formed by the contour line is used as an area to be subjected to inkjet printing by the plane model, that is, an inkjet area, and the motion trajectory data is generated based on the length or width size of the inkjet area, so that the radiation range of the motion trajectory in the length direction and the width direction can completely include the entire range of the inkjet area, where the radiation range of the motion trajectory refers to the inkjet range of the nozzle array currently used for inkjet printing when the printing nozzle completely runs through the motion trajectory.

In step S104 of some embodiments, the method includes controlling the print head to move the motion trajectory data, performing inkjet printing on the a-th layer block to be printed by using the ith head array, performing inkjet printing on the a + 1-th layer block to be printed by using the jth head array, optionally selecting one of the head arrays to perform inkjet printing when printing the first layer block to be printed, adjusting the position of the print head so that the selected head array reaches the initial position of the motion trajectory indicated by the motion trajectory data, controlling the print head to move the motion trajectory data so that the selected head array moves and performs inkjet printing along the motion trajectory, starting to print the second layer block to be printed after printing the first layer block to be printed is completed, randomly selecting one print array from the rest head arrays (except the head array used for printing the first layer block to be printed) to perform inkjet printing, adjusting the position of the print head so that the currently selected head array reaches the initial position of the motion trajectory indicated by the motion trajectory data, controlling the print head to move the current head array along the motion trajectory and perform inkjet printing on the selected head array, and repeating the operation until all the print blocks of the second layer block to be printed are printed, and repeating the operation of the print head array.

It can be understood that the inkjet printing of the a-th layer block to be printed by using the ith nozzle array refers to randomly printing the next layer block to be printed by using any one nozzle array (except for the nozzle array used for printing the previous layer block to be printed) from each nozzle array, and the inkjet printing of the a + 1-th layer block to be printed by using the jth nozzle array refers to printing the next layer block to be printed by using any one nozzle array (except for the nozzle array used for printing the a-th layer block to be printed) from each nozzle array.

The layer block to be printed comprises at least one layer of plane model, and at least two groups of spray head arrays are arranged.

In one embodiment, the layer block to be printed comprises a layer of plane model, and the nozzle arrays are divided into two groups.

Specifically, when the block to be printed only includes one layer of planar model and the nozzle arrays are two groups, the printing of all the planar models is completed by alternately switching the nozzle arrays, that is, the planar model of the odd-numbered layer is printed by the first group of nozzle arrays, and the planar model of the even-numbered layer is printed by the second group of nozzle arrays.

Referring to fig. 2, in some embodiments, step S103 may include, but is not limited to, step S201 to step S203.

Step S201, judging whether an area in the outline range of the plane model is an effective printing area; if yes, go to step S202; if not, executing step S203;

step S202, generating a plurality of groups of first motion tracks along a first plane direction in the range of an effective printing area;

step S203, generating a second motion track along a second plane direction;

the effective printing area is an area needing ink jet printing, the first plane direction is perpendicular to the second plane direction, the printing range covered by the spray head array when the spray head array moves along the first motion track is not smaller than the area range of the effective printing area, and the second motion track is connected with two adjacent effective printing areas.

In step S201 of some embodiments, determining whether an area within the outline of the planar model is an effective printing area may be identifying the outline of the planar model after obtaining the planar model, regarding an area within a closed outline as an effective printing area for the planar model with only one outline, and regarding an area between two closed outlines as an effective printing area for the planar model with multiple outlines.

In step S202 of some embodiments, several groups of first motion tracks are generated in the range of the effective printing area along the first plane direction, which may be a length direction or a width direction of the effective printing area as the first plane direction, and several groups of first motion tracks running along the first plane direction are generated, where the first motion tracks are spaced apart from each other and are parallel to each other, and the spacing between the first motion tracks is related to the size of the selected nozzle array, so that when the printing nozzle completely walks through the motion tracks, the ink ejection range of the nozzle array currently used for ink jet printing can completely include the entire range of the ink ejection area, so as to ensure the printing effect.

Preferably, the interval between two adjacent sets of first motion tracks is the same as the length of the current nozzle array for inkjet printing in the second plane direction, so as to reduce the motion distance of the printing nozzles.

In step S203 of some embodiments, the second motion track is generated along the second planar direction, where the second motion track is generated between the first motion tracks of the two effective printing areas, one end of the second motion track is connected to one end of the last first motion track of one of the effective printing areas, and the other end of the second motion track is connected to one end of the first motion track of the other effective printing area, and if only one effective printing area in the planar model or the current effective printing area is the last effective printing area, the second motion track is not generated.

As shown in fig. 3, it can be understood that the first plane direction is a moving direction when the printing head performs inkjet printing on the effective printing area of the plane model, and when the printing head finishes one group of first moving tracks along the first plane direction, the printing head moves to one end of another adjacent group of first moving tracks, and then moves along a direction opposite to the first plane direction, and the process is repeated until all the first moving tracks are finished. The second plane direction is a moving direction of the printing nozzle for switching the effective printing area, the second moving track is generated along the second plane direction, the traveling distance of the printing nozzle can be saved, in addition, the second plane direction can also be a moving direction of the printing nozzle for switching the printing position in the effective printing area, and preferably, the printing nozzle moves along the second plane direction and moves from one end of one group of first moving tracks to one end of the other group of first moving tracks.

Referring to fig. 4, in some embodiments, step S104 may include, but is not limited to, step S401 to step S403.

Step S401, determining a second spray head array based on the first spray head array;

the first nozzle array is used for printing a previous layer block to be printed, and the second nozzle array is used for printing the current layer block to be printed;

step S402, calculating the distance between the first spray head array and the second spray head array to obtain a displacement distance;

and S403, performing compensation calculation on the motion track data based on the displacement distance, controlling the printing nozzle to run the compensated motion track data, and performing ink-jet printing on the current layer block to be printed by using the second nozzle array.

In step S401 of some embodiments, a second nozzle array is determined based on the first nozzle array, specifically, a nozzle array used for printing a previous layer block to be printed is used as the first nozzle array, a selection is made from other nozzle arrays except the first nozzle array, the selected nozzle array is used as the second nozzle array, and when a next layer block to be printed is printed, the current second nozzle array is used as the first nozzle array, and a new second nozzle array is selected again. For example, the nozzle arrays may be arranged in sequence, the first nozzle array is used to print the first layer block to be printed, the second nozzle array is used to print the second layer block to be printed, the third nozzle array is used to print the third layer block to be printed, the first nozzle array is used to print the next layer block to be printed until the last nozzle array finishes printing, and so on, until all the layer blocks to be printed are finished printing, or one nozzle array is randomly selected from other nozzle arrays except the first nozzle array to print the current layer block to be printed.

In step S402 of some embodiments, the distance between the first nozzle array and the second nozzle array is calculated to obtain the displacement distance, which may be by setting reference points on the first nozzle array and the second nozzle array, respectively, and calculating the distance between the reference points to determine the displacement distance. And if the first nozzle array and the second nozzle array are in the same column or the same row, the distance between the two reference points is the displacement distance, and if the first nozzle array and the second nozzle array are in different columns and different rows, the distance between the two reference points is subjected to distance decomposition along the column direction and the row direction to respectively obtain the column direction displacement distance and the row direction displacement distance.

In step S403 of some embodiments, a compensation calculation is performed on the motion trajectory data based on the displacement distance, specifically, the displacement distance is added to the original motion trajectory data as a compensation amount, and the original first nozzle array moves on the motion trajectory indicated by the motion trajectory data and is converted into the second nozzle array moves on the motion trajectory indicated by the motion trajectory data. And performing compensation calculation to obtain compensated motion track data, controlling the printing nozzle to operate the compensated motion track data, and performing ink-jet printing on the current layer block to be printed by using the second nozzle array.

In some embodiments, one showerhead array partially coincides with another showerhead array.

Specifically, when the print head is subjected to the area division processing, the divided head arrays may share a part of the heads so that the two head arrays partially overlap. For example, the number of the nozzles of the printing nozzles may be 200, and each of the nozzles may be arranged in a row and divided into three nozzle arrays, where the first nozzle array includes the first 100 nozzles, the second nozzle array includes the 50 th to 150 th nozzles, and the third nozzle array includes the 100 th to 200 th nozzles.

Referring to fig. 5, based on the embodiment of fig. 1, in some embodiments, the method may further include, but is not limited to, steps S501 to S502.

Step S501, carrying out area division processing on a plane model to obtain o areas to be printed;

step S502, controlling the movement track data of the printing nozzles, performing ink-jet printing on the b-th to-be-printed area by using the x-th nozzle array, and performing ink-jet printing on the b + 1-th to-be-printed area by using the y-th nozzle array;

wherein x is more than or equal to 1 and less than or equal to m, y is more than or equal to 1 and less than or equal to m, b is more than or equal to 1 and less than or equal to o, x is not equal to y, m is the number of the nozzle arrays, o is the number of the areas to be printed, and x, y, b, m and o are integers.

In step S501 of some embodiments, a region division process is performed on a planar model to obtain a plurality of regions to be printed, where the nozzle array is divided according to a printing area of the planar model to divide at least two regions to be printed, a user may set a setting parameter of the region to be printed of the planar model through an interactive interface, and then a printing device may obtain a corresponding setting result, so as to perform the corresponding division process according to the setting result. Illustratively, the printing area of the planar model is 100mm × 100mm, and the planar model is divided into two parts in equal area, so as to obtain two areas to be printed.

In step S502 of some embodiments, the method includes controlling the print head to move the motion trajectory data, performing inkjet printing on the b-th to-be-printed area by using the x-th head array, performing inkjet printing on the b + 1-th to-be-printed area by using the y-th head array, randomly selecting one of the head arrays to perform inkjet printing when printing the first to-be-printed area, adjusting the position of the print head to allow the selected head array to reach the start position of the motion trajectory indicated by the motion trajectory data, controlling the print head to move the selected head array along the motion trajectory data and perform inkjet printing, starting to print the second to-be-printed area after printing the first to-be-printed area is completed, randomly selecting one print array from the rest head arrays (except the head array used for printing the first to-be-printed area) to perform inkjet printing, adjusting the position of the print head to allow the currently selected head array to reach the start position of the motion trajectory indicated by the motion trajectory data, controlling the print head to move the currently selected head array along the motion trajectory data and perform inkjet printing on the second to-be-printed area, and so on the adjacent print areas, and so on the print areas.

It can be understood that the inkjet printing of the b-th to-be-printed area by using the x-th nozzle array refers to randomly printing the current to-be-printed area by using any one nozzle array (except for the nozzle array used for printing the previous to-be-printed layer block) from each nozzle array, and the inkjet printing of the b + 1-th to-be-printed area by using the y-th nozzle array refers to printing the next to-be-printed area by using any one nozzle array (except for the nozzle array used for printing the b-th to-be-printed layer block) from each nozzle array.

Referring to fig. 6, based on the embodiment of fig. 1, in some embodiments, the method may further include, but is not limited to, steps S601 to S604.

Step S601, when the number of the layer blocks to be printed reaches a preset printing threshold value, controlling the printing nozzles to operate to a test area, and performing ink-jet printing by using each nozzle array to obtain a test layer;

step S602, judging whether the spray heads of each spray head array are blocked according to the test layer; if not, go to step S603; if yes, go to step S604;

step S603, controlling the printing nozzle to return to the operation area, running the motion track data and printing the rest layer blocks to be printed;

in step S604, printing of the remaining layer block to be printed is suspended.

In steps S601 to S604 of some embodiments, a test area for testing an ink ejection effect of a print head may be preset, a user may set a test threshold parameter for entering test printing through an interactive interface, when the number of to-be-printed layer blocks continuously printed reaches the test threshold parameter, a test program is entered, the print head is driven to the test area for testing, all heads in all head arrays are used for performing an ink ejection printing test during the test process to obtain a test layer, whether the heads are clogged is determined by identifying an ink ejection condition of each ink ejection site of the test layer, when no abnormal ink ejection occurs, the test flow is ended and printing is continued, and when abnormal ink ejection occurs, printing is suspended and inspection is stopped.

Referring to fig. 7, an embodiment of the present application further provides a fracture-prevention 3D printing apparatus, which can implement the fracture-prevention 3D printing method, and the apparatus includes:

the second division module is used for carrying out regional division processing on the spray head arrays of the printing spray heads to obtain m spray head arrays;

The specific implementation of the anti-fracture 3D printing device is substantially the same as the specific implementation of the anti-fracture 3D printing method, and is not described herein again.

The embodiment of the application further provides electronic equipment, the electronic equipment comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the anti-fracture 3D printing method. The electronic equipment can be any intelligent terminal including a tablet computer, a vehicle-mounted computer and the like.

Referring to fig. 8, fig. 8 illustrates a hardware structure of an electronic device according to another embodiment, where the electronic device includes:

the processor 801 may be implemented by a general-purpose CPU (central processing unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits, and is configured to execute a relevant program to implement the technical solution provided in the embodiment of the present application;

the memory 802 may be implemented in a form of a Read Only Memory (ROM), a static storage device, a dynamic storage device, or a Random Access Memory (RAM). The memory 802 may store an operating system and other application programs, and when the technical solution provided by the embodiments of the present disclosure is implemented by software or firmware, the relevant program codes are stored in the memory 802, and the processor 801 calls to execute the anti-fracture 3D printing method according to the embodiments of the present disclosure;

an input/output interface 803 for realizing information input and output;

the communication interface 804 is used for realizing communication interaction between the device and other devices, and can realize communication in a wired manner (such as USB, network cable, and the like) or in a wireless manner (such as mobile network, WIFI, bluetooth, and the like);

a bus 805 that transfers information between the various components of the device (e.g., the processor 801, memory 802, input/output interfaces 803, and communication interface 804);

wherein the processor 801, the memory 802, the input/output interface 803 and the communication interface 804 are communicatively connected to each other within the device via a bus 805.

An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for performing anti-fracture 3D printing is implemented.

The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The embodiment of the application provides a fracture-preventing 3D printing method, a fracture-preventing 3D printing device, electronic equipment and a storage medium, wherein a planar model obtained after slicing and a nozzle array of a printing nozzle are divided, a plurality of layer blocks to be printed and the nozzle array are obtained respectively, when the operation motion track data of the printing nozzle is controlled, the nozzle array different from the nozzle array used when the last layer block to be printed is used for carrying out ink jet printing on the current layer block to be printed, so that two adjacent layer blocks to be printed respectively use different nozzle arrays to complete ink jet printing, the layer blocks to be printed are prevented from being continuously printed by using the same nozzle array, continuous empty printing is prevented from occurring when part of nozzles of the nozzle array are blocked, even if part of nozzles of part of the nozzle array are blocked, the adjacent layer blocks to be printed are printed by using other nozzle arrays, the occurrence probability of the continuous empty printing condition can be reduced, and the risk that the printed products are fractured in the scanning direction of the planar model is effectively reduced.

The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions provided in the embodiments of the present application, and it is obvious to those skilled in the art that the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems with the evolution of technology and the emergence of new application scenarios.

It will be understood by those skilled in the art that the embodiments shown in the figures are not limiting, and may include more or fewer steps than those shown, or some of the steps may be combined, or different steps.

The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

One of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

The terms "first," "second," "third," "fourth," and the like (if any) in the description of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that, in this application, "at least one" means one or more, "a plurality" means two or more. "and/or" is used to describe the association relationship of the associated object, indicating that there may be three relationships, for example, "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing programs, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and the scope of the claims of the embodiments of the present application is not limited thereby. Any modifications, equivalents, and improvements that may occur to those skilled in the art without departing from the scope and spirit of the embodiments of the present application are intended to be within the scope of the claims of the embodiments of the present application.

Claims

1. A fracture prevention 3D printing method is characterized by comprising the following steps:

controlling the printing nozzle to operate the motion track data, performing inkjet printing on the a-th layer block to be printed by using the ith nozzle array, and performing inkjet printing on the a + 1-th layer block to be printed by using the jth nozzle array; wherein i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to m, a is more than or equal to 1 and less than or equal to n, i is not equal to j, m is the number of spray head arrays, n is the number of layer blocks to be printed, and i, j, a, m and n are integers;

controlling the printing nozzle to operate the motion track data, performing ink-jet printing on the b-th to-be-printed area by using the x-th nozzle array, and performing ink-jet printing on the b + 1-th to-be-printed area by using the y-th nozzle array; wherein x is more than or equal to 1 and less than or equal to m, y is more than or equal to 1 and less than or equal to m, b is more than or equal to 1 and less than or equal to o, x is not equal to y, m is the number of the nozzle arrays, o is the number of the areas to be printed, and x, y, b, m and o are integers;

when a first layer block to be printed is printed, randomly selecting one of the nozzle arrays to perform ink jet printing, adjusting the position of a printing nozzle to enable the selected nozzle array to reach the initial position of a motion track indicated by the motion track data, controlling the printing nozzle to run the motion track data to enable the selected nozzle array to move along the motion track and perform ink jet printing, starting to print a second layer block to be printed after the first layer block to be printed is printed, randomly selecting one printing array from the rest nozzle arrays to perform ink jet printing, adjusting the position of the printing nozzle to enable the currently selected nozzle array to reach the initial position of the motion track indicated by the motion track data, controlling the printing nozzle to run the motion track data to enable the currently selected nozzle array to move along the motion track and perform ink jet printing, completing the printing of the second layer block to be printed, and so on until all the layer blocks to be printed are printed.

2. The fracture-prevention 3D printing method according to claim 1, wherein the layer block to be printed comprises at least one layer of the planar model, and the nozzle arrays are at least two groups.

3. The fracture-prevention 3D printing method according to claim 1, wherein the generating motion trajectory data according to the contour shape of each of the planar models includes:

if not, generating a second motion track along a second plane direction;

4. The anti-fracture 3D printing method according to claim 1, wherein the controlling the printing nozzles to run the motion trajectory data, performing inkjet printing on the a-th layer block to be printed by using the ith nozzle array, and performing inkjet printing on the a + 1-th layer block to be printed by using the jth nozzle array includes:

5. The fracture-prevention 3D printing method according to claim 4, wherein one of the nozzle arrays partially overlaps the other nozzle array.

6. The fracture-prevention 3D printing method according to claim 1, further comprising:

7. An anti-fracture 3D printing device, the device comprising:

the first dividing module is used for dividing a plurality of plane models after the three-dimensional model is sliced along the scanning direction to obtain n layer blocks to be printed and carrying out area division on the plane models to obtain o areas to be printed;

the control module is used for controlling the printing spray head to operate the motion track data, performing ink-jet printing on the a-th layer block to be printed by using the ith spray head array, and performing ink-jet printing on the a + 1-th layer block to be printed by using the jth spray head array; wherein i is not less than 1 and not more than m, j is not less than 1 and not more than m, a is not less than 1 and not more than n, i is not equal to j, m is the number of spray head arrays, n is the number of layer blocks to be printed, i, j, a, m and n are integers, and the spray head is used for controlling the printing spray head to operate the motion track data, the xth spray head array is used for carrying out ink jet printing on the xth area to be printed, and the yth spray head array is used for carrying out ink jet printing on the xth area to be printed; wherein x is more than or equal to 1 and less than or equal to m, y is more than or equal to 1 and less than or equal to m, b is more than or equal to 1 and less than or equal to o, x is not equal to y, m is the number of the nozzle arrays, o is the number of the areas to be printed, and x, y, b, m and o are integers;

8. An electronic device, characterized in that the electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the fracture-prevention 3D printing method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the fracture-prevention 3D printing method according to any one of claims 1 to 6.