CN114474732A

CN114474732A - Data processing method, system, 3D printing method, device and storage medium

Info

Publication number: CN114474732A
Application number: CN202210108990.5A
Authority: CN
Inventors: 荣左超; 陈禺; 陈六三
Original assignee: Shanghai Union Technology Corp
Current assignee: Shanghai Union Technology Corp
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-05-13

Abstract

The application discloses a data processing method, a data processing system, a 3D printing method, a device and a storage medium, wherein the data processing method comprises the following steps: adding a compensation area to a printing area with a smaller outline according to the outline difference of each part of the printing area in the slice image of the adjacent slice layer; wherein the sliced layer is obtained based on slicing the 3D data model, and the compensation area comprises a solid side close to the printing area in the compensated sliced image and a contour side far away from the printing area in the compensated sliced image; then, determining the radiation data of the compensation area so that the radiation energy corresponding to the compensation area is decreased from the entity side to the contour side. This application is through increasing the compensation area on the less printing area of outline to make the corresponding radiant energy of compensation area decrease progressively from entity side to outline side, make and form natural transition structure between the adjacent solidification layer of different profile shapes, can effectively solve the lamination phenomenon in the 3D printing component under the condition that does not additionally increase the number of layers of section.

Description

Data processing method, system, 3D printing method, device and storage medium

Technical Field

The present application relates to the field of 3D printing technologies, and in particular, to a data processing method, a data processing system, a 3D printing method, a 3D printing device, and a storage medium.

Background

In 3D printing, a 3D data model is generally divided into a plurality of sliced layers, and then energy is radiated to a printing material on a printing surface by an energy radiation device, so that the printing material to be solidified is solidified and molded after being radiated, a solidified layer is formed, and a 3D component is formed after the solidified layer is printed and accumulated layer by layer.

In some cases, when the layer thickness of a sliced layer is large and/or the cross-sectional area of an adjacent sliced layer changes rapidly, a layered texture, referred to as a layer texture or cross-hatching, is likely to occur. If the surface quality requirements for the 3D member are high, it is difficult to meet the print quality requirements.

Disclosure of Invention

In view of the above-mentioned shortcomings of the related art, the present application aims to provide a data processing method, a system, a 3D printing method, a device and a storage medium, so as to overcome the above-mentioned technical problems of obvious print striations in the related art.

To achieve the above and other related objects, a first aspect of the present disclosure provides a data processing method, including: adding a compensation area to a printing area with a smaller outline according to the outline difference of each part of the printing area in the slice image of the adjacent slice layer; wherein the slice layer is obtained based on slicing the 3D data model, and the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image; and determining radiation data of the compensation area so that the radiation energy corresponding to the compensation area is decreased from the entity side to the contour side.

A second aspect of the present disclosure provides a data processing system comprising: an interface module; the storage module stores at least one program; the processing module is connected with the interface module and the storage module and used for calling the at least one program so as to execute the data processing method according to the first aspect of the disclosure.

A third aspect of the present disclosure provides a 3D printing method for a 3D printing apparatus, the 3D printing apparatus including: energy radiation device, component platform, and be used for holding the container of the material that treats solidification, the 3D printing method includes the following step: adjusting the height of the component platform to fill the material to be solidified on the printing reference surface; radiating energy to a printing reference plane based on printing data corresponding to a solid portion of the 3D member; radiating energy to a printing reference surface based on printing data corresponding to each compensation area so as to solidify and mold the material to be solidified on the printing reference surface into a pattern solidified layer; wherein the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image, and the energy radiated by the energy radiation device decreases from the solid side to the contour side; repeating the steps to accumulate the pattern curing layer by layer on the component platform to form the 3D component; wherein the print data is obtained according to the data processing method according to the first aspect of the present disclosure.

A fourth aspect of the present disclosure provides a 3D printing apparatus, including: a container for holding a material to be cured; an energy radiation device located above or below the container to radiate energy to a print surface inside the container based on print data; the component platform is positioned in the container in the printing operation and used for accumulating and attaching the pattern curing layer by layer to form a corresponding 3D component; the Z-axis driving mechanism is connected with the component platform and is used for adjusting the height of the component platform in the Z-axis direction so as to adjust the distance from the component platform to a printing surface in a printing operation; and a control device for controlling the energy radiation device and the Z-axis driving mechanism to work cooperatively in a printing job to execute the 3D printing method according to the third aspect of the disclosure, so as to accumulate and attach the solidified layers on the component platform to obtain the corresponding 3D component.

A fifth aspect of the present disclosure provides a computer-readable storage medium comprising a stored computer program, wherein the computer program, when executed by a processor, controls an apparatus in which the storage medium is located to perform the data processing method as described in the first aspect of the present disclosure.

To sum up, the technical scheme that provides in this application is through increasing the compensation area on the printing area that the profile is less in the section image of adjacent sliced layer to make the radiant energy that the compensation area corresponds decrease progressively from entity side to profile side, make and form natural transition structure between the adjacent solidification layer of different profile shapes after printing, can effectively solve the lamination appearance in the 3D printing component under the condition that does not additionally increase the number of layers of section. Moreover, the scheme provided by the application can be suitable for various types of printing equipment and has high applicability.

Other aspects and advantages of the present application will be readily apparent to those skilled in the art from the following detailed description. Only exemplary embodiments of the present application have been shown and described in the following detailed description. As those skilled in the art will recognize, the disclosure of the present application enables those skilled in the art to make changes to the specific embodiments disclosed without departing from the spirit and scope of the invention as it is directed to the present application. Accordingly, the descriptions in the drawings and the specification of the present application are illustrative only and not limiting.

Drawings

The specific features of the invention to which this application relates are set forth in the appended claims. The features and advantages of the invention to which this application relates will be better understood by reference to the exemplary embodiments described in detail below and the accompanying drawings. The brief description of the drawings is as follows:

FIG. 1 is a schematic diagram of a data processing system in one embodiment of the present application;

FIG. 2 is a schematic diagram of a data processing method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of slice images of adjacent slices in one embodiment of the present application;

FIG. 4a is a schematic diagram of a 3D data model according to an embodiment of the present application;

FIG. 4b is a schematic diagram of a slice pattern of the slice layer corresponding to the partial structure of FIG. 4a in one embodiment;

FIG. 5 shows a schematic diagram of a method of adding compensation area to a less contoured print area in one embodiment of the present application;

FIG. 6 is a schematic diagram of slice images and compensation images of adjacent slices in one embodiment of the present application;

FIG. 7 is a schematic diagram of a slice image and a compensation image in one embodiment of the present application;

FIG. 8 is a schematic illustration of a slice image and a compensation image in one embodiment of the present application;

FIG. 9 is a schematic diagram of a projected image in one embodiment of the present application;

FIG. 10 is a schematic diagram of a compensated image in one embodiment of the present application;

FIG. 11 is a schematic structural diagram of a 3D printing apparatus according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of a 3D printing method according to an embodiment of the present disclosure.

Detailed Description

The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.

In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that changes in the module or unit composition, electrical, and operation may be made without departing from the spirit and scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Although the terms first, second, etc. may be used herein to describe various elements, information, or parameters in some instances, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one compensation region or parameter from another. For example, a first compensation region may be referred to as a second compensation region, and similarly, a second compensation region may be referred to as a first compensation region, without departing from the scope of the various described embodiments. The first compensation zone and the second compensation zone are both describing one compensation zone, but they are not the same compensation zone unless the context clearly dictates otherwise. Depending on context, for example, the word "if" as used herein may be interpreted as "at … …" or "at … …".

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

As described in the background, the striations are easily generated when the layer thickness of a sliced layer is large and/or the cross-sectional area of adjacent sliced layers changes rapidly. In some embodiments, this problem can be solved by reducing the thickness of the cut sheet layer and increasing the number of cut sheet layers, but this approach can lead to a reduction in printing efficiency.

In view of the above, the present application provides a data processing method, which can be executed by a data processing system.

In an exemplary embodiment, please refer to fig. 1, which is a schematic diagram of a data processing system 200 according to an embodiment of the present application, the data processing system including: an interface module 201, a storage module 202 and a processing module 203.

The interface module 201 determines its interface type according to the connected device, which includes but is not limited to: universal serial interface, video interface, industrial control interface, etc. For example, the interface module 201 may include a USB interface, an HDMI interface, an RS232 interface, and the like. The memory module is used for storing at least one program, so that the control method can be executed when the program is called, and the memory module 202 comprises a nonvolatile memory and a system bus. The nonvolatile memory is exemplified by a solid state disk or a U disk. The system bus is used to connect the non-volatile memory with the CPU, wherein the CPU may be integrated in the memory module or packaged separately from the memory module and connected to the non-volatile memory through the system bus. The processing module 203 comprises: the processing module comprises at least one of a CPU or a chip integrated with the CPU, a programmable logic device (FPGA) and a multi-core processor, and further comprises a memory, a register and the like for temporarily storing data. The processing module is connected with the interface module and the storage module so as to receive the slice images provided by the interface module and call at least one program in the storage module to execute the data processing method.

In an exemplary embodiment, please refer to fig. 2, which is a schematic diagram of a data processing method according to an embodiment of the present application. As shown in the figure, in step S110, according to the difference of the contour of each part of the printing area in the slice image of the adjacent slice layer, a compensation area is added to the printing area with smaller contour; wherein the slice layer is obtained based on slicing the 3D data model, and the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image.

It should be appreciated that slicing the 3D data model results in several slice layers, each slice layer having a respective slice image. Here, the outlines of the printed areas in the slice images of the adjacent slice layers are compared. For example, for the first slice layer, the outline of the print area in the slice image of the first slice layer is compared with the outline of the print area in the slice image of the next slice layer; for the last slice layer, comparing the outline of the printing area in the slice image of the last slice layer with the outline of the printing area in the slice image of the last slice layer; for each slice layer between the first and last layers, the outlines of the print area in the slice image of the previous slice layer and the print area in the slice image of the next slice layer are compared, respectively.

The slice image is obtained by performing cross-sectional division in the Z-axis direction (i.e., in the height direction) based on the 3D component model in advance. Wherein a slice image is formed on the cross-sectional layer formed by each adjacent cross-sectional division, the slice image including a print area outlined by the outline of the 3D member model. For a 3D printing device based on surface projection, each slice image needs to be described as a layered image. For a 3D printing device based on scanning illumination, the slice image is described by coordinate data on the scanning path.

In an exemplary embodiment, each slice image may be acquired externally by the data processing system. For example, after slicing the 3D data model, the external computer system sends each slice image and related data to the data processing system through the interface module of the data processing system to perform the data processing method. In still other embodiments, each of the data processing systems may also slice the 3D data model directly through the processing module to obtain slice images.

Here, the print area corresponds to a portion of the slice image that is formed by printing. For example, for a surface exposure forming printing apparatus, the print area includes a pixel area with a non-zero gray value in the slice image; as another example, for a laser scanning printing device, the print region includes a scan region in the slice image.

It should be understood that, for the surface-exposed 3D printing apparatus, a bright picture is projected onto the printing reference surface by the energy radiation device during the printing process, and the light wave band corresponding to the bright picture can cure and mold the printing material on the printing reference surface, so that the printing material on the printing reference surface can be correspondingly molded into the pattern cured layer based on the picture projected by the energy radiation device. The gray value of each pixel in the image projected by the energy radiation device represents the brightness of each part in the projection picture, when the gray value of the pixel is 0, the part corresponding to the pixel in the projection picture appears black, namely no brightness, so that for a surface-exposed 3D printing device, the gray value of each pixel in the part of the slice image which needs to be printed and formed is configured to be nonzero, a specific gray value is configured based on the actually required forming effect, and the larger the gray value is, the higher the brightness in projection is.

It should be understood that in a laser scanning forming 3D printing apparatus, a material to be solidified is formed by laser scanning it to form a solidified layer, thereby solidifying point by point along a scanning path. Therefore, for a 3D printing apparatus of laser scanning forming, a printing area in a slice image is generally processed into a scanning path, so that after an energy radiation device of the 3D printing apparatus scans radiation along the scanning path corresponding to the printing area in the slice image, a pattern cured layer corresponding to the printing area of the slice image is formed. Therefore, for a laser scanning forming 3D printing device, its printing area includes a scanning area in the slice image, and the scanning area represents a portion of the slice image that needs to be scanned and cured.

In some embodiments, in the printing areas of the slice images of two adjacent slice layers, there are cases where the contour of different parts differs, for example, there may be cases where the contour shape presented by the printing areas is irregular, and the like. Please refer to fig. 3, which is a schematic diagram of slice images of adjacent slice layers according to an embodiment of the present application. As shown in the figure, the slice image S1 and the slice image S2 are slice images of two adjacent slice layers, and the printed area in the slice image S1 and the printed area in the slice image S2 exhibit irregular shapes of contours and have differences in contours in a plurality of portions. For example, in section P1, the print area contour in the cut image S2 is larger than the print area contour in the cut image S1; in the sections P2 and P3, the print area contour in the slice image S2 is smaller than the print area contour in the slice image S1.

It is understood that the striations are formed due to abrupt changes in the contours, precisely because of the large differences in the contours of the printed areas in the slice images of adjacent sliced layers. Therefore, when the printed areas of two adjacent sliced sheet slice images have contour differences in a plurality of portions, it is necessary to add compensation areas to the smaller contours of these difference portions, respectively.

Continuing with the example corresponding to fig. 3, for the print area in the slice image S1 and the print area in the slice image S2, there is a contour difference in the P1, P2, and P3 portions. Namely: in section P1, the print area contour in the cut image S2 is larger than the print area contour in the cut image S1; in the sections P2 and P3, the print area contour in the slice image S2 is smaller than the print area contour in the slice image S1. Here, it is necessary to add a compensation area to the print area having a smaller outline (i.e., the print area in the cut-out image S1) in the P1 portion, and to add a compensation area to the print area having a smaller outline (i.e., the print area in the cut-out image S2) in the P2 and P3 portions.

It should be understood that the compensation area is an additional printing area added on the basis of the printing area in the compensated original slice image, and herein, for convenience of description, a side of the compensation area close to the compensated printing area is referred to as a solid side, and a side of the compensation area far from the compensated printing area is referred to as a contour side.

In step S120, the radiation data of the compensation region is determined, so that the radiation energy corresponding to the compensation region decreases from the physical side to the profile side.

The radiation data corresponding to the compensation area can be determined based on the type of the energy radiation device in the 3D printing equipment, so that when the energy radiation device in the 3D printing equipment radiates based on the radiation data during actual printing, the radiation energy corresponding to the compensation area decreases from the entity side to the contour side.

It will be appreciated that, since the degree of curing of the material to be cured is determined according to the amount of energy received by the material to be cured, the degree of curing is lower when the material to be cured receives less radiation energy, and the degree of curing is higher when the material to be cured receives more radiation energy. In certain embodiments, the degree of cure is reflected in the depth of cure, i.e., when the degree of cure is low, the depth of cure is less, whereas when the degree of cure is high, the depth of cure is greater. Based on such an understanding, when the radiation energy corresponding to the compensation region decreases from the solid side to the contour side, the curing depth of the material to be cured at the time of printing is also decreased at the time of molding, thereby forming a uniform transition structure between the differential contours of the adjacent layers.

In one exemplary embodiment, to reduce the amount of computation, it may be determined whether a compensation portion needs to be added based on the size of the contour difference, whereby a compensation area may be added to a print area having a smaller contour only in a portion having a larger contour difference. Here, a lower limit of the contour difference may be set, and a portion where the contour difference is larger than the lower limit of the contour difference may be determined as a compensation portion to add a compensation area to a print area having a smaller contour in the compensation portion. For the 3D printing equipment for surface exposure forming, the lower limit of the contour difference can be 3-10 pixels, namely when the contour difference of a certain part of the printing areas of the adjacent sliced layer slice images exceeds 3-10 pixels, a compensation area is added to the printing area with the smaller contour; for the laser scanning forming 3D printing equipment, the lower limit of the profile difference can be 3-10 light spot diameters, namely when the profile difference of a certain part of the printing area of the adjacent sliced sheet slice images exceeds the size of 3-10 light spot diameters, a compensation area is added to the printing area with the smaller profile.

In another exemplary embodiment, some contour differences are required for the structure of the 3D data model itself, and no compensation area needs to be added to the printed area in the associated slice image. For example, please refer to fig. 4a in combination with fig. 4b, wherein fig. 4a is a schematic diagram illustrating a structure of a 3D data model in an embodiment of the present application, and fig. 4b is a schematic diagram illustrating a slice pattern of a slice layer corresponding to the local structure in fig. 4a in an embodiment. As shown in fig. 4a, the 3D data model itself has a sudden change region a1 in structure, so that as shown in fig. 4b, the printing region in the slice image S3 and the slice image S4 of the adjacent layer corresponding to the sudden change region has a sudden change in outline, and for this case, it may not be necessary to add a compensation region.

Based on such an understanding, in some cases, an upper limit of the contour difference may also be set, and only if the contour difference of the print areas in the slice images of the adjacent layers is smaller than the upper limit of the contour difference, the compensation area needs to be added to the print area having a smaller contour. For the 3D printing equipment for surface exposure forming, the upper limit of the contour difference can be 30-50 pixels including 30, 40, 50 pixels and the like, namely when the contour difference of a certain part of the printing areas of adjacent sliced layer slice images is less than 30-50 pixels, a compensation area is added to the printing area with the smaller contour; for the laser scanning forming 3D printing equipment, the upper limit of the profile difference can be, for example, 30-50 spot diameters, including but not limited to 30, 40, 50 spot diameters and the like, namely when the profile difference of a certain part in the printing area of the slice images of adjacent slices is smaller than the size of 30-50 spot diameters, a compensation area is added to the printing area with the smaller profile.

It should be understood that, since the compensation area is added to the print area with smaller outline, for each slice layer, it needs to be compared with the slice layers adjacent to the upper and lower layers respectively to determine the print area corresponding to each slice layer relative to the print area corresponding to the upper and lower slice layers, so as to add the compensation area to these portions. Of course, for the first layer and the last layer of sliced layers, only one adjacent sliced layer is needed, so that for the first layer of sliced layer, the comparison with the next sliced layer is only needed, and for the last layer of sliced layer, the comparison with the last sliced layer is only needed.

With this understanding in mind, in one exemplary embodiment, please refer to FIG. 5, which is a schematic diagram of a method of adding a compensation area to a less contoured print area in one embodiment of the present application.

As shown in the figure, in step S1101, a print area in the current slice layer slice image is compared with a print area in the previous slice layer slice image to obtain an outline of the print area in the previous slice layer slice image, which is larger than the print area in the current slice layer slice image, so as to determine a first compensation area.

For convenience of description, a slice image of each slice layer is defined as P_nThe slice image corresponding to the last slice layer of each slice layer is P_n-1The slice image corresponding to the next slice layer of each slice layer is P_n+1. Here, P is compared_nPrinting area of (1) and P_n-1In the print area of (1), get P_n-1Middle print area is greater than P_nThe outline of the middle print region, thereby determining P_nThe first compensation region of (1).

In step S1102, a print area in the current sliced layer slice image is compared with a print area in a next sliced layer slice image, and an outline of the print area in the next sliced layer slice image, which is larger than the print area in the current sliced layer slice image, is determined to determine a second compensation area.

Here, P is compared_nPrinting area of (1) and P_n+1In the print area of (1), get P_n+1Middle print area is greater than P_nThe outline of the middle print region, thereby determining P_nThe second compensation region of (1).

In some embodiments, at P_n-1Printing area and P in_n+1Each having a relative P to_nWhen the printing area in (b) has a large outline, that is, the first compensation area and the second compensation area exist at the same time, the corresponding radiation data needs to be determined for the first compensation area and the second compensation area at the same time.

In other embodiments, at P_n-1Has a printing area with respect to P_nLarger outline in the print area of (1), P_n+1Does not have a printing area with respect to P_nThe second compensation area is 0 when the print area has a larger outline. In still other embodiments, when in P_n+1Has a printing area with respect to P_nLarger profile for the printed area in (1), P_n-1Does not have a printing area with respect to P_nThe first compensation area is 0 when the print area in (1) has a large outline. In still other embodiments, when P_n-1Printing area and P in_n+1None of the printing areas in (1) has a relative P_nThe first compensation area and the second compensation area are both 0 when the print area in (b) has a large outline.

For example, for a 3D data model with a pyramid structure, if the top layer is the first slice layer and the bottom layer is the last slice layer, the slice image of each slice layer is gradually enlarged. In this embodiment, there is no second compensation region and no first compensation region from the first slice layer to the second last slice layer, and there is no first compensation region and no second compensation region for the last slice layer. For another example, for some 3D data models with complex surface structures, some slice layers may have both the first compensation region and the second compensation region, some slice layers may have only one of the first compensation region and the second compensation region, and some slice layers have neither the first compensation region nor the second compensation region, which is not further described herein.

In one exemplary embodiment, the 3D printing device is a surface exposure molding 3D printing device.

Based on such an understanding, when the 3D printing apparatus is a surface exposure forming 3D printing apparatus, the radiation data of each compensation region may include a compensation image. The compensation image may be one or more, and may be configured according to the actual requirement of printing, which will be described in detail below.

In one embodiment, the compensation image corresponding to each compensation area is one, and the gray value of the compensation image decreases from the solid side to the contour side.

Here, since the brightness of the screen projected by the energy radiation device is mainly related to the exposure intensity of the energy radiation device on the one hand, and the gray-scale value of the projected image on the other hand, the gray-scale value of different portions in the projected image can be changed so that different portions of the print forming surface receive different light energies when projected, without changing the exposure intensity. Based on such understanding, with the surface exposure forming 3D printing apparatus, in printing the portion corresponding to the compensation image, in order to form the transition structure between the outlines of the cured layers of the adjacent patterns, the gradation value of the compensation image projected by the energy radiation device is decreased from the solid side to the outline side, whereby the curing depth corresponding to the solid side is deeper, the curing depth corresponding to the outline side is shallower, and the curing depth between the solid side and the outline side is gradually transitioned, thereby forming the transition structure.

In an exemplary embodiment, the gray value of each pixel in the compensation image varies according to the pixel position.

It should be understood that, since the smallest imaging unit in the image is a pixel, the gray value variation of different pixels in the compensated image is varied in units of pixels, for example, the gray value of the pixel on the solid side is the highest, and the gray value of each pixel on the solid side toward the contour side is decreased pixel by pixel according to the position. The gray value of the pixel on the solid side may be the same as or similar to the gray value of the pixel in the compensated print area, and the gray value of each pixel on the outline side may be close to 0, for example, the gray value may be 1 to 30. The pixel may be changed every pixel, or may be changed every two, three or more pixels, and may be configured according to actual requirements in actual applications, which is not described herein again.

In a possible embodiment, the grey values of the individual pixels between the solid side and the contour side may vary according to a certain law, including, without limitation, linear, parabolic, multiple curves, etc., which law is related to the characteristics of the material to be cured and the energy radiation means.

It will be appreciated that in some embodiments, when the same slice layer includes a plurality of compensation regions, each compensation region corresponds to a respective compensation image. Please refer to fig. 6, which is a schematic diagram illustrating slice images and compensation images of adjacent slice layers according to an embodiment of the present application. As shown in fig. 6, the solid line portions in the slice image S5 and the slice image S6 are print areas in two adjacent slice layer slice images, and according to the difference in the outline of the print area in the slice image S5 and the print area in the slice image S6, since the outline of the print area in the slice image S6 is smaller than that in the slice image S5, compensation areas are added to the print area portions of P4 and P5 in the slice image S6, respectively. Here, a compensation image, i.e., a difference image compared with the contour of the slice image S5 is determined for each of the two compensation regions.

In an embodiment, when the same slice layer comprises a plurality of compensation regions, the energy radiation device may project the slice image and each compensation image separately when printing the slice layer during the actual printing process. For example, continuing with the embodiment corresponding to fig. 6 as an example, referring to fig. 7, which is a schematic diagram of the slice image and the compensation image in the present application in an embodiment, when printing the slice layer, the energy radiation device may respectively project the slice image S6', the compensation image C6' and the compensation image C6 ″, wherein the projection sequence may be configured according to actual requirements, and may be generally configured to project the slice image first and then project the compensation image.

In another embodiment, the compensation images of the compensation regions can be combined into a total compensation image in advance, and in the actual printing process, when the slice layer is printed, the energy radiation device can project the slice image first and then project the total compensation image. For example, continuing with the embodiment corresponding to fig. 6 as an example, please refer to fig. 8, which is a schematic diagram of the slice image and the compensation image in the present application in an embodiment, in which the compensation image of each compensation area in fig. 6 is processed into a total compensation image C6' ″, and the energy radiation device can respectively project the slice image S6' and the total compensation image C6' ″ when printing the slice layer, wherein the projection sequence can be configured according to actual requirements, and generally can be configured to project the slice image first and then project the total compensation image.

In yet another embodiment, the compensation image and the slice image in each compensation area in the same slice layer may be processed into one image, and it is convenient to describe herein that the processed image is referred to as a projection image, when the slice layer is printed, only one projection image needs to be projected to print a pattern cured layer, and the pattern cured layer includes a printing area corresponding to the original slice image and a curing area corresponding to each compensation image, and in the curing area of each compensation image, the curing depth decreases from a curing area close to the printing area corresponding to the slice image to a curing area far from the printing area corresponding to the slice image. For example, continuing with the embodiment corresponding to fig. 6 as an example, please refer to fig. 9, which is a schematic diagram of the projection image in one embodiment of the present application, in the projection image S6 ″, the solid line part represents the original slice image, the dotted line part represents the compensation image, and the overlapped part of the two is shown by the dot-dash line because the compensation image is close to the slice image. As shown in fig. 9, by the projection image, the solidification region corresponding to the slice image and the compensation image can be solidified at the same time.

In another exemplary embodiment, the compensation images corresponding to the compensation regions are multiple, and the radiation data corresponding to the compensation images are different, so that when the compensation images are projected, the energy received by the printing reference surface is different, and the forming depth of the printing material is different.

It should be understood that the factors affecting the energy radiated by the energy radiation device include a gray value of a projected image, a projection time, a projection power, and the like. Therefore, in a possible embodiment, the energy received by the printing reference surface can be controlled by changing the gray value of the compensation image, and/or the projection time of the energy radiation device when projecting the compensation image, and/or the projection power of the energy radiation device when projecting the compensation image in different compensation images in the same compensation area.

In one embodiment, please refer to fig. 10, which is a schematic diagram of a compensation image in the present application. As shown, the left side of the arrow is a compensation area, which includes three compensation images as shown on the right side of the arrow.

In one embodiment, the number of compensation images corresponding to the compensation area may be configured according to the pixel position, for example, in the compensation area, each pixel located on the entity side is determined as a first compensation image, each pixel closest to the first compensation image is determined as a second compensation image, and so on until all pixels in the compensation area are allocated to the corresponding compensation image.

Here, the gray-scale values of the pixels in the compensation images may be different, for example, in the embodiment corresponding to fig. 10, the gray-scale values of the compensation images on the right side of the arrow may be configured as: the gray value at the top is highest, the gray value at the middle level is lowest, and the gray value at the bottom is lowest. Wherein, the gray scales of the pixels in the same compensation image can be the same or similar. In a possible embodiment, the gray values of the respective compensation images decrease from the solid side to the contour side. The gray value of each pixel in the compensated image on the solid side may be the same as or similar to the gray value of the pixel in the compensated print area, and the gray value of each pixel on the outline side may be close to 0.

In other embodiments, the gray scale values of the compensation images in the same compensation region may be the same or similar, but the projection times are different, e.g., the projection times of the compensation images decrease from the solid side to the outline side when printed.

In some embodiments, the gray scale value and the projection time of each compensation image in the same compensation region may be the same or similar, but the projection power is different, for example, the projection power of each compensation image decreases from the solid side to the contour side when printing. In a possible embodiment, the projection power may be achieved by controlling the current level of the energy radiation means in the 3D printing device.

It can be understood that there are many combinations that affect the energy level through the image gray-scale value, the projection time, and the projection power, and those skilled in the art can configure the combination according to actual requirements, so that detailed descriptions thereof are omitted here.

In an exemplary embodiment, the data processing method is used for a laser scanning profiled 3D printing device.

In a laser scanning forming 3D printing device, factors that affect the energy received by the material to be cured mainly include laser power and scanning time. Thus, for a laser scan profiled 3D printing device, the radiation data of the compensation area may include laser power and scan time.

In an exemplary embodiment, the radiation data in each compensation region is changed by taking the spot size as a position unit, so that the radiation energy corresponding to the compensation region is decreased from the solid side to the profile side.

Here, since the minimum unit of laser position change of the laser scanning patterned 3D printing apparatus during printing is determined based on the spot size, the radiation energy of each portion in the compensation region changes depending on the spot diameter as a position unit, so that the radiation energy corresponding to the compensation region decreases from the solid side to the contour side. For example, the laser power of each part in the compensation area decreases from the solid side to the contour side during printing. As another example, the scanning time of each portion in the compensation area decreases from the solid side to the outline side during printing.

In a possible embodiment, the laser power or scan time between the solid side and the profile side may vary according to a certain law, including, but not limited to, linear, parabolic, multiple curves, etc., which law is related to the characteristics of the material to be solidified and the energy radiation means.

In an exemplary embodiment, after determining the slice image of each slice layer and the radiation data of the compensation region, print data for 3D printing is determined so that the print data is provided to a 3D printing device for printing.

Here, for a surface exposure forming 3D printing apparatus, the data processing system will process into projection images corresponding to each sliced layer, and parameters at the time of projection including, but not limited to, exposure intensity, exposure time, and the like. For a 3D printing device of laser scanning forming, a data processing system processes the 3D printing device into scanning paths corresponding to the slicing layers and scanning parameters, wherein the scanning parameters include laser intensity, scanning time and the like.

In some embodiments, the data processing method may be executed while printing, for example, before each slice layer is printed, the radiation data of the compensation region corresponding to the slice layer to be printed is determined based on the data processing method, and after a slice layer is printed, the radiation data of the corresponding compensation region is determined for the next slice layer based on the data processing method. In other embodiments, the data processing method may also be that before printing, whether to add a compensation region to a printing region in each sliced layer slice image and radiation data of the compensation region to be determined to the printing region where the compensation region needs to be added are determined, and after the radiation data of each compensation region and the radiation data of each sliced layer of the original 3D data model are integrated, final print data may be formed to be provided to the 3D printing device for printing.

It should be understood that 3D printing is one of the rapid prototyping techniques, which is a technique for building objects by layer-by-layer printing using bondable material, such as powdered metal or plastic, based on a digital model file. When printing, firstly, the digital model file is processed to realize the import of the 3D data model to be printed to the 3D printing device. Here, the 3D data model includes, but is not limited to, a 3D data model based on a CAD member, which is, for example, an STL file, and the control device performs layout and layer cutting processing on the imported STL file. The 3D data model may be imported into the control device via a data interface or a network interface. The solid part in the imported 3D data model may be any shape, for example, the solid part includes a tooth shape, a sphere shape, a house shape, a tooth shape, or any shape with a preset structure. Wherein the preset structure includes but is not limited to at least one of the following: cavity structures, structures containing shape mutations, and structures with preset requirements for contour accuracy in solid parts, etc.

3D printing apparatus carries out the mode of layer by layer exposure solidification and the accumulation each solidified layer to photocuring material through energy radiation device and prints the 3D component, and concrete photocuring rapid prototyping technique's theory of operation does: the light curing material is used as raw material, under the control of the control device, the energy radiation device irradiates and carries out layer-by-layer exposure or scanning according to the slice image of each slice layer, and the slice image and the resin thin layer positioned in the radiation area are cured after photopolymerization reaction, so that a thin layer section of the workpiece is formed. It should be noted that, in the printing process in the present application, the slice image based on which the energy radiation device radiates energy is a processed slice image, that is, the slice image includes a print area in the original slice image before data processing and a compensation area added to the print area after data processing. After one layer is cured, the worktable moves one layer thick, and a new layer of light-cured material is coated on the surface of the resin which is just cured so as to carry out cyclic exposure or scanning. And (3) firmly bonding the newly cured layer on the previous layer, repeating the steps, and stacking the layers one by one to finally form the whole product prototype, namely the 3D component. The photocurable material generally refers to a material that forms a cured layer after being irradiated by light (such as ultraviolet light, laser light, etc.), and includes but is not limited to: photosensitive resin, or a mixture of photosensitive resin and other materials. Such as ceramic powders, pigments, etc.

In this application, the 3D printing device may be a surface exposure forming 3D printing device, and may also be a laser scanning forming 3D printing device. The 3D printing equipment in this application includes container, component platform, Z axle actuating mechanism, energy radiation device, controlling means.

The surface exposure forming 3D printing equipment comprises but is not limited to photocuring printing equipment for surface exposure such as DLP (digital light processing), LCD (liquid crystal display) and the like. For example, in a DLP printing apparatus, the energy radiation device includes a DMD chip, a controller, and a memory module, for example. Wherein the storage module stores therein slice images layering a 3D data model. And the DMD chip irradiates the light source corresponding to each pixel on the slice image onto the printing reference surface after receiving the control signal of the controller. In fact, the mirror is composed of hundreds of thousands or even millions of micromirrors, each micromirror represents a pixel, and the projected image is composed of these pixels. The DMD chip may be simply described as a semiconductor optical switch and a micromirror plate corresponding to the pixel points, and the controller allows/prohibits each of the micromirrors to reflect light by controlling each of the optical switches in the DMD chip, thereby irradiating the corresponding slice image onto the photo-curable material so that the photo-curable material corresponding to the shape of the image is cured to obtain a patterned cured layer. For another example, in the LCD printing apparatus, the energy radiation device may also include an LCD light source system, the LCD light source system includes an LED light source and an LCD liquid crystal screen, a control chip in the energy radiation device projects a layered image of the slice to be printed onto the printing surface through the LCD liquid crystal screen, and the material to be solidified in the container is solidified into a corresponding pattern solidified layer by using a pattern radiation surface provided by the LCD liquid crystal screen.

The Laser scanning and forming 3D printing Apparatus includes, but is not limited to, SLA (stereolithography Apparatus, photocuring rapid prototyping), SLS (Selective Laser Sintering), and the like.

In one embodiment, for an SLS apparatus, the energy radiation device comprises a laser emitter, a flat field focusing lens and a galvanometer system, and the laser emitter, the flat field focusing lens and the galvanometer system controllably adjust the energy of the output laser beam. For example, the laser transmitter is controlled to emit a laser beam with a preset power and stop emitting the laser beam, and for example, the laser transmitter is controlled to increase the power of the laser beam and decrease the power of the laser beam; the flat field focusing lens is used for adjusting the focusing position of the laser beam, the galvanometer system is used for controllably scanning the laser beam in a two-dimensional space of a printing reference surface in the container, and the light-cured material scanned by the laser beam is cured into a corresponding pattern cured layer. The component platform of the SLS device is arranged in a powder bed or a sintering forming chamber for containing materials to be solidified and is used for attaching and accumulating the irradiated and solidified pattern layers. After powder bed powder laying is finished, heating a powder material to be solidified to a certain temperature just lower than a powder sintering point through a constant temperature facility in a printing device, tracking a three-dimensional model slice of a printing component by laser of an energy radiation device, copying the slice on the powder bed in a corresponding image, heating the powder material to a temperature higher than the melting point under laser irradiation to realize sintering, realizing solidification in a height corresponding to the slice, descending the powder bed after one layer is built, starting to build a corresponding next slice image on the existing solidified layer, and repeating the process until printing is finished.

In another embodiment, the 3D printing apparatus is, for example, an SLA apparatus based on top exposure or bottom exposure, and the energy radiation device includes a laser emitter, a lens group located on an outgoing light path of the laser emitter, and a vibrating lens group located on an outgoing light side of the lens group, wherein the laser emitter controllably adjusts energy of an output laser beam, for example, the laser emitter controllably emits a laser beam with a preset power and stops emitting the laser beam, and further, the laser emitter controllably increases power of the laser beam and decreases power of the laser beam. The lens group is used for adjusting the focusing position of the laser beam; the vibrating mirror group is used for controllably scanning laser beams in a two-dimensional space on the surface or the bottom surface of the container, and the light curing material scanned by the laser beams is cured into a corresponding pattern curing layer.

In an exemplary embodiment, the 3D printing devices are classified according to the setting position of the energy radiation device, and may be 3D printing devices for top surface radiation molding or 3D printing devices for bottom surface radiation molding. In the 3D printing equipment with radiation molding on the top surface, an energy source, namely an energy radiation device, is positioned above a container in the 3D printing equipment and radiates energy to a printing material in the container in the printing process; in a bottom surface radiation molding 3D printing device, an energy source is located below a container in the 3D printing device and radiates energy to a printing material in the container during printing. Specifically, in the embodiment where the 3D printing apparatus is a top surface radiation patterning 3D printing apparatus, the energy radiation device is located above the container and the printing reference plane is typically located above the level of the photocurable material in the container. In a printing operation, the energy radiation device radiates energy to a printing reference surface located in the container to cure a material to be cured located on the printing reference surface. After printing one layer, the Z-axis drive mechanism controls the member platform to move down one print height to continue printing on the first cured layer. In the embodiment where the 3D printing apparatus is bottom surface radiation molding, the energy radiation device is located below the container, and the printing reference surface is typically located on the lower surface of the light-curable material in the container. In a printing operation, the energy radiation device radiates energy to a printing reference surface located in the container to cure a material to be cured located on the printing reference surface. After printing one layer, the Z-axis driving mechanism controls the component platform to move upwards for a certain distance so as to peel the first cured layer from the bottom of the container, and controls the Z-axis driving mechanism to control the component platform to move to the next printing height so as to continuously print on the first cured layer.

It is to be understood that the printing reference plane is a horizontal plane of the material to be shaped, typically the printing reference plane is located in the container, and the distance of the printing reference plane from the exit position of the energy radiation device is determined based on the focal length of the energy radiation device. In some embodiments, such as in a top-surface radiation patterning 3D printing apparatus, the printing reference surface is located above a level of photocurable material contained in the container; in other embodiments, such as in a bottom-surface radiation-molding 3D printing device, the printing reference surface may also be located at a position below the surface of the photocurable material.

In an exemplary embodiment, referring to fig. 11, which is a schematic structural diagram of the 3D printing apparatus of the present application in an embodiment, as shown, the 3D printing apparatus includes a container 12, a component platform 13, a Z-axis driving mechanism 14, an energy radiation device 11, and a control device 15.

The container 12 is used to hold printing material, i.e., material to be cured, such as light curable material, and in some implementations is also referred to as a resin vat, a material vat, or the like. The volume of the container depends on the type or format size of the 3D printing device. The light-curable material includes any liquid or powder material that is easily light-cured, and examples of the liquid material include: a photocurable resin liquid, or a resin liquid doped with a mixed material such as an additive, a pigment, or a dye. Powder materials include, but are not limited to: ceramic powder, color additive powder, etc. The materials of the container include but are not limited to: glass, plastic, resin, etc.

The member platform 13 is used to attach the irradiation-cured pattern cured layer so as to form a 3D member by accumulation of the pattern cured layer. Specifically, the component platform is exemplified by a component plate. The component platform typically takes a preset printing reference surface located in the container as a starting position, and each solidified layer solidified on the printing reference surface is accumulated layer by layer to obtain a corresponding 3D printing component. It should be understood that the 3D member to be printed may be an object of any shape or configuration.

The Z-axis driving mechanism 14 is connected to the component platform 13 for controllably moving the adjustment component platform 13 in the vertical axial direction to adjust the spacing from the printing reference plane for filling the photo-setting material to be set. Wherein, the printing reference surface refers to the initial surface of the light-cured material irradiated. In order to accurately control the irradiation energy of each cured layer, the Z-axis driving mechanism needs to drive the component platform to move to a position where the minimum distance between the component platform and the printing reference surface is the layer thickness of the cured layer to be cured.

The energy radiation device 11 is used to irradiate the light-curable material in the container to obtain a pattern-cured layer. Specifically, the energy radiation device irradiates the photocurable material in the container to obtain the 3D member according to each layered image in print data generated based on the cut-processed three-dimensional model of the 3D member to be printed. In some implementation scenarios, the energy radiation device is also often referred to as an optical system. For the SLA printing apparatus, the energy radiation system includes a laser emitter, a lens group located on an outgoing light path of the laser emitter, and a vibration lens group located on an outgoing light side of the lens group, where the laser emitter controllably adjusts energy of an output laser beam, for example, the laser emitter controllably emits a laser beam with a preset power and stops emitting the laser beam, and as another example, the laser emitter controllably increases power of the laser beam and decreases power of the laser beam. The lens group is used for adjusting the focusing position of the laser beam, the vibration mirror group is used for controllably scanning the laser beam in a two-dimensional space of the top surface of the container, and the light-cured material scanned by the light beam is cured into a corresponding pattern cured layer. In the DLP printing apparatus, the energy radiation device includes a DMD chip, a controller, and a memory module, for example. Wherein the storage module stores therein a layered image layering the 3D component model. And the DMD chip irradiates the light source of each pixel on the corresponding layered image to the top surface of the container after receiving the control signal of the controller. In fact, the mirror is composed of hundreds of thousands or even millions of micromirrors, each micromirror represents a pixel, and the projected image is composed of these pixels. The DMD chip may be simply described as a semiconductor light switch and a micromirror plate corresponding to the pixel points, and the controller allows/prohibits the light reflected from each of the micromirrors by controlling each of the light switches in the DMD chip, thereby irradiating the corresponding layered image onto the photo-curable material through the transparent top of the container so that the photo-curable material corresponding to the shape of the image is cured to obtain the patterned cured layer. In the LCD printing equipment, the energy radiation device is an LCD liquid crystal screen light source system. The LCD liquid crystal screen light source system comprises an LCD liquid crystal screen and a light source, wherein the LCD liquid crystal screen is positioned above the container, and the light source is arranged above the LCD liquid crystal screen in an aligned mode. And a control chip in the energy radiation device projects the layered image of the slice to be printed to a printing surface through an LCD (liquid crystal display), and the material to be solidified in the container is solidified into a corresponding pattern solidified layer by using a pattern radiation surface provided by the LCD.

The control device 15 is connected to the energy radiation device 11 and the Z-axis driving mechanism 14, and is used for controlling the energy radiation device 11 and the Z-axis driving mechanism 14 under the printing operation, so as to attach and stack the pattern cured layer on the component platform 13 to obtain the corresponding three-dimensional object. The control device 15 is an electronic device including a processor, for example, the control device is a computer device, an embedded device, or an integrated circuit integrated with a CPU.

For example, the control device includes: the device comprises a processing unit, a storage unit and a plurality of interface units. And each interface unit is respectively connected with a device which is independently packaged in 3D printing equipment such as an energy radiation device and a Z-axis driving mechanism and transmits data through an interface. The control device further comprises at least one of the following: a prompting device, a human-computer interaction device and the like. The interface unit determines its interface type according to the connected device, which includes but is not limited to: universal serial interface, video interface, industrial control interface, etc.

For example, the interface unit includes: USB interface, HDMI interface and RS232 interface, wherein, USB interface and RS232 interface all have a plurality ofly, and the USB interface can connect man-machine interaction device etc. and RS232 interface connection Z axle actuating mechanism, HDMI interface connection energy radiation device. The storage unit is used for storing files required by 3D printing equipment for printing. The file includes: the CPU runs the required program files and configuration files, etc.

The memory unit includes a non-volatile memory and a system bus. The nonvolatile memory is, for example, a solid state disk or a usb disk. The system bus is used to connect the non-volatile memory with the CPU, wherein the CPU may be integrated in the memory unit or packaged separately from the memory unit and connected to the non-volatile memory through the system bus.

The processing unit includes: a CPU or a chip integrated with a CPU, a programmable logic device (FPGA), and a multi-core processor. The processing unit also includes memory, registers, etc. for temporarily storing data.

The processing unit controls each device to execute in time sequence, for example, the processing unit transmits printing data to the energy radiation device after controlling the Z-axis driving mechanism to move the component platform to a spacing position away from a preset printing reference surface. The processing unit can control the energy radiation device to radiate energy to the forming surface according to the layered image so as to cure the light curing material on the printing reference surface. After a pattern curing layer is formed, the Z-axis driving mechanism is controlled to drive the component platform to adjust and move to a new space position away from the preset printing reference surface, and the exposure process is repeated.

In an exemplary embodiment, referring to fig. 12, which is a schematic diagram of a 3D printing method according to an embodiment of the present application, as shown in step S210, the height of the component platform is adjusted to fill the material to be solidified on the printing reference surface.

And controlling the Z-axis driving mechanism to move the component platform to a spacing position away from the preset printing reference surface so as to fill the printing material to be solidified between the component platform and the printing reference surface.

In step S220, energy is radiated to the printing reference plane based on the printing data corresponding to the solid portion of the 3D member.

Here, the energy radiation device radiates energy based on print data corresponding to a 3D member solid portion, i.e., a portion corresponding to a slice image in the aforementioned data processing method. The energy radiation device radiates energy to the printing reference surface based on the slice image, resulting in a pattern cured layer corresponding to the slice image.

In one embodiment, for a surface exposure modeling 3D printing apparatus, the energy radiation device projects a picture containing a slice image onto the printing reference surface to obtain a corresponding patterned cured layer. In another embodiment, for a laser scanning profiled 3D printing apparatus, the energy radiation device emits laser light to the printing reference surface and scans along a printing path containing a corresponding slice image to obtain a corresponding patterned cured layer.

In step S230, energy is radiated to a printing reference surface based on the printing data corresponding to each compensation area to solidify and mold the material to be solidified on the printing reference surface into a pattern solidified layer; wherein the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image, and the energy radiated by the energy radiation device decreases from the solid side to the contour side.

Here, the energy irradiation device irradiates energy based on the print data corresponding to each compensation region in the aforementioned data processing method, to obtain the pattern cured layer corresponding to the compensation region. And in step S230, when the energy radiation device radiates energy to the printing reference surface based on the printing data of the compensation area, the energy radiated by the energy radiation device decreases from the solid side to the contour side, so that the pattern curing layer correspondingly formed on the printing and forming surface also has different curing depths.

In one embodiment, for a surface exposure forming 3D printing apparatus, the energy radiation device projects a picture containing the compensation image onto the printing reference surface to obtain a corresponding pattern cured layer. When the compensation images are plural, energy is radiated to the printing reference surface based on each compensation image, that is, each compensation image needs to be projected simultaneously or in a time-sharing manner. In some cases, when the printed area in the slice image of a certain slice layer has a smaller profile than the printed area in the slice images of the upper and lower slice layers, the first compensation area and the second compensation area are generated, and therefore, it is also necessary to radiate energy to the printing reference plane based on the respective compensation images corresponding to the first compensation area and the second compensation area in these embodiments.

In another embodiment, for a laser scanning profiled 3D printing apparatus, the energy radiation device emits laser light to the printing reference surface and scans along the printing path corresponding to the compensation area to obtain the corresponding patterned cured layer.

Of course, for a print layer without a compensation area, the print data in step S230 may be regarded as 0.

In the printing layer with the compensation area, after the steps S220 and S230 are performed, a cured pattern layer can be obtained on the printing reference surface, and the curing depth of the part of the cured pattern layer corresponding to the compensation area decreases from the part close to the solid part to the part far from the solid part.

The execution sequence of the step S220 and the step S230 may be in tandem, for example, the step S220 is executed first, and then the step S230 is executed; or may be synchronized, for example, a picture including a slice image and a compensation image is projected at the same time, which is not limited herein.

In step S240, steps S210 to S230 are repeated to accumulate the pattern cured layer by layer on the member platform, and finally form the 3D member.

The present application also provides a computer-readable and writable storage medium storing a computer program which, when executed, implements at least one embodiment described above for the data processing method, such as the embodiment described in any one of fig. 1 to 10.

The functions, if implemented in the form of software functional units 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 or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application.

In the embodiments provided herein, the computer-readable and writable storage medium may include read-only memory, random-access memory, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, a USB flash drive, a removable hard disk, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable-writable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are intended to be non-transitory, tangible storage media. Disk and disc, as used in this application, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.

In one or more exemplary aspects, the functions described in the computer program of the methods described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. The steps of a method or algorithm disclosed herein may be embodied in a processor-executable software module, which may be located on a tangible, non-transitory computer-readable and/or writable storage medium. Tangible, non-transitory computer readable and writable storage media may be any available media that can be accessed by a computer.

The flowcharts and block diagrams in the figures described above of the present application illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. A data processing method for 3D printing, the data processing method comprising the steps of:

adding a compensation area to a printing area with a smaller outline according to the outline difference of each part of the printing area in the slice image of the adjacent slice layer; wherein the slice layer is obtained based on slicing the 3D data model, and the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image;

and determining radiation data of the compensation area so that the radiation energy corresponding to the compensation area is decreased from the entity side to the contour side.

2. The data processing method according to claim 1, wherein a portion where the contour difference is larger than a lower limit of the contour difference is determined as a compensation portion, and a compensation area is added to a print area having a smaller contour in the compensation portion; or/and determining a portion where the contour difference is smaller than the upper limit of the contour difference as a compensation portion, and adding a compensation area to a print area having a smaller contour in the compensation portion.

3. The data processing method of claim 1, wherein the step of adding a compensation area to a print area with a smaller outline according to the difference of the outlines of the parts of the print area in the slice images of the adjacent slice layers comprises:

comparing a printing area in the current sliced layer slice image with a printing area in the previous sliced layer slice image to obtain the outline of the printing area in the previous sliced layer slice image, which is larger than the printing area in the current sliced layer slice image, so as to determine a first compensation area;

and comparing the printing area in the current sliced layer slice image with the printing area in the next sliced layer slice image, and determining the outline of the printing area in the next sliced layer slice image, which is larger than the printing area in the current sliced layer slice image, so as to determine a second compensation area.

4. The data processing method according to any one of claims 1 to 3, wherein the data processing method is used for a surface exposure modeling 3D printing apparatus, and the printing area includes a pixel area with a non-zero gray scale value in the slice image.

5. The data processing method of claim 4, wherein the radiation data of each compensation zone comprises a compensation image; wherein the gray value of the compensation image decreases from the solid side to the contour side.

6. The data processing method of claim 5, wherein the gray value of each pixel in the compensation image varies according to pixel position.

7. The data processing method of claim 4, wherein the radiation data for each compensation zone comprises a plurality of compensation images.

8. The data processing method according to claim 7, characterized in that the gray value and/or projection time and/or projection power of each compensation image are different in the same compensation area.

9. The data processing method of claim 8, wherein when the gray-level values of the compensation images in the same compensation region are different, the gray-level values of the compensation images decrease from the solid side to the contour side.

10. The data processing method of claim 9, wherein the gray value of each compensation image varies according to the position of each compensation image in the compensation region.

11. The data processing method according to any one of claims 1 to 3, wherein the data processing method is used for a laser scanning forming 3D printing device, and the printing area comprises a scanning area in the slice image.

12. The data processing method of claim 11, wherein the radiation data for each compensation zone includes laser power and scan time.

13. The data processing method of claim 12, wherein the radiation data in each compensation region varies in units of spot size to decrease the radiation energy corresponding to the compensation region from the solid side to the profile side.

14. The data processing method of claim 1, wherein: the data processing method further comprises: based on the radiation data of each slice image and the compensation area, print data for 3D printing is determined.

15. A data processing system, comprising:

an interface module;

the storage module stores at least one program;

a processing module, connected to the interface module and the storage module, for calling the at least one program to execute the data processing method according to any one of claims 1 to 14.

16. A3D printing method is used for a 3D printing device, and the 3D printing device comprises: energy radiation device, component platform, and be used for holding the container of the material that treats solidification, the 3D printing method includes the following step:

adjusting the height of the component platform to fill the material to be solidified on the printing reference surface;

radiating energy to a printing reference plane based on printing data corresponding to a solid portion of the 3D member;

radiating energy to a printing reference surface based on printing data corresponding to each compensation area so as to solidify and mold the material to be solidified on the printing reference surface into a pattern solidified layer; wherein the compensation area comprises a solid side close to the printing area in the compensated slice image and a contour side far away from the printing area in the compensated slice image, and the energy radiated by the energy radiation device decreases from the solid side to the contour side;

repeating the steps to accumulate the pattern curing layer by layer on the component platform to form the 3D component; wherein the print data is obtained by the data processing method according to any one of claims 1 to 14.

17. The 3D printing method according to claim 16, wherein the 3D printing apparatus is a surface exposure forming 3D printing apparatus, the printing area includes a pixel area having a non-zero gray value in the slice image, and the step of radiating energy to a printing reference surface based on printing data corresponding to a solid portion of a 3D member includes: radiating energy to a printing reference plane based on a slice image corresponding to a solid portion of the 3D member; the step of radiating energy to the printing reference plane based on the printing data corresponding to each compensation area includes: and radiating energy to the printing reference surface on the basis of the compensation images corresponding to the compensation areas so as to solidify and shape the material to be solidified on the printing reference surface.

18. The 3D printing method according to claim 17, wherein the number of the compensation images corresponding to at least one compensation region is plural, and the step of radiating energy to the printing reference plane based on the printing data corresponding to each compensation region includes: and respectively radiating energy to the printing reference surface based on each compensation image so as to solidify and shape the material to be solidified on the printing reference surface.

19. The 3D printing method according to claim 17, wherein the compensation regions include a first compensation region and a second compensation region, and the step of radiating energy to the printing reference plane based on the printing data corresponding to each compensation region includes: energy is radiated to the printing reference plane based on the respective compensation images corresponding to the first compensation region and the second compensation region, respectively.

20. The 3D printing method according to claim 16, wherein the 3D printing device is a laser scan profiled 3D printing device, the printing area includes a scanning area in the slice image, and the step of radiating energy to a printing reference plane based on printing data corresponding to a solid portion of a 3D member includes: radiating energy to a printing reference plane based on a printing path corresponding to the 3D component solid portion; the step of radiating energy to the printing reference plane based on the printing data corresponding to each compensation area includes: and radiating energy to the printing reference surface based on the printing paths corresponding to the compensation areas so as to solidify and shape the material to be solidified on the printing reference surface.

21. A3D printing apparatus, comprising:

a container for holding a material to be cured;

an energy radiation device located above or below the container to radiate energy to a print surface inside the container based on print data;

the component platform is positioned in the container in the printing operation and used for accumulating and attaching the pattern curing layer by layer to form a corresponding 3D component;

the Z-axis driving mechanism is connected with the component platform and is used for adjusting the height of the component platform in the Z-axis direction so as to adjust the distance from the component platform to a printing surface in a printing operation;

a control device for controlling the energy radiation device and the Z-axis driving mechanism to work cooperatively in a printing operation to execute the 3D printing method according to any one of claims 16-20, so as to accumulate the adhered curing layer on the component platform to obtain the corresponding 3D component.

22. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed by a processor, controls an apparatus in which the storage medium is located to perform a data processing method according to any one of claims 1 to 14.