Three-dimensional printing method, apparatus, device, and computer-readable storage medium

Abstract

Embodiments of the present application provide a three-dimensional printing method, device, equipment and computer readable storage medium, wherein the method comprises obtaining a target object to be printed; generating a printing track based on the target object; the printing track comprises an object track and a protection track, the object track is a track for printing the target object, and the protection track is a track for printing a closed loop object, the closed loop object surrounds the target object; and the target object and the closed loop object are printed layer by layer based on the printing track. The technical solution of the embodiments of the present application can cure high-viscosity photocurable materials, the printing process does not require material support, and the synchronous printing based on the protection track can effectively prevent material collapse, so that the printing effect is more accurate and the precision of the printed object is higher.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to a 3D printing method, apparatus, device, and computer-readable storage medium. Background Technology

[0002] SLA (Stereo lithography Apparatus) is a technology that uses digital model files as a basis and an industrial control computer to control a laser to scan the liquid photosensitive resin in a photosensitive resin tank layer by layer along a specific trajectory. This causes the irradiated liquid photosensitive resin to solidify instantly to form solid sheets, which are then scanned and stacked layer by layer to achieve 3D printing.

[0003] Currently, because the photocurable material is prone to collapse during layer-by-layer scanning, it needs to be coated in a photosensitive resin tank; however, the printing accuracy is still limited and difficult to improve. Summary of the Invention

[0004] This application provides a 3D printing method, apparatus, device, and computer-readable storage medium to solve or alleviate one or more technical problems in the prior art.

[0005] As a first aspect of the embodiments of this application, the embodiments of this application provide a three-dimensional printing method, including:

[0006] Get the target object to be printed;

[0007] A printing trajectory is generated based on the target object; the printing trajectory includes an object trajectory and a protection trajectory, the object trajectory is the trajectory for printing the target object, and the protection trajectory is the trajectory for printing a closed-loop object, the closed-loop object surrounding the target object;

[0008] The target object and the closed-loop object are printed layer by layer based on the printing trajectory.

[0009] As a second aspect of the embodiments of this application, the embodiments of this application provide a three-dimensional printing apparatus, including:

[0010] The acquisition module is used to acquire the target object to be printed;

[0011] A trajectory generation module is used to generate a printing trajectory based on the target object; the printing trajectory includes an object trajectory and a protection trajectory, the object trajectory is the trajectory for printing the target object, and the protection trajectory is the trajectory for printing a closed-loop object, the closed-loop object surrounding the target object;

[0012] The control module is used to print the target object and the closed-loop object layer by layer based on the printing trajectory.

[0013] As a third aspect of the present application, the present application provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described 3D printing method.

[0014] As a fourth aspect of the present application, the present application provides a computer-readable storage medium that stores computer instructions, and when the computer instructions are run on a computer, the methods in any of the above-described embodiments are executed.

[0015] The embodiments of this application employ the above-described technical solution to cure high-viscosity photocurable materials. The printing process does not require material support, and the synchronous printing based on the protective trajectory can effectively prevent material collapse, resulting in more accurate printing and higher precision of the printed items.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0018] Figure 1 A schematic diagram of the structure of a material coating apparatus according to an embodiment of this application is shown.

[0019] Figure 2 A schematic diagram of the base structure of a material coating apparatus according to an embodiment of this application is shown.

[0020] Figure 3 A structural schematic diagram of the base of the material coating apparatus according to an embodiment of this application is shown from another perspective.

[0021] Figure 4 A schematic diagram of the flattening seat structure of the material coating apparatus according to an embodiment of this application is shown.

[0022] Figure 5 A flowchart illustrating a three-dimensional printing method according to an embodiment of this application is shown.

[0023] Figure 6A schematic structural block diagram of a three-dimensional printing apparatus according to an embodiment of this application is shown.

[0024] Figure 7 A structural block diagram of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] Figure 1 A schematic diagram of the structure of a material coating apparatus according to an embodiment of this application is shown. Figure 2 A schematic diagram of the base 100 of the material coating apparatus according to an embodiment of this application is shown. Figure 3 A structural schematic diagram of the base 100 of the material coating apparatus according to an embodiment of this application is shown from another perspective. Figures 1 to 3 As shown, the material coating device is used to coat material onto a worktable. The material coating device includes: a base 100, a discharge roller 200, and a flattening assembly.

[0027] In this embodiment, the base 100 is provided with a coating outlet 101 so that material flows out from the coating outlet 101. The roller shaft of the discharge roller 200 is mounted above the coating outlet 101.

[0028] It should be noted that the material coating apparatus provided in this application embodiment is used for coating high-viscosity photocurable materials. Its viscosity range is 12000 mPa·s to 11100 mPa·s. Photocurable materials within this viscosity range have poor flowability and are not easily collapsed. When the high-viscosity photocurable material falls onto the discharge roller 200, it can coat the discharge roller 200 as the roller rolls.

[0029] It is worth noting that the high-viscosity photocurable material mentioned in the embodiments of this application may be in a semi-cured state. Its poor fluidity does not mean that it does not flow; its resistance to collapse does not mean that it will not collapse at all.

[0030] In this embodiment, when a high-viscosity photocurable material is coated on the discharge roller 200, and one end of the semi-cured photocurable material is in contact with the worktable, the force of the relative motion and the material's gravity act simultaneously as the discharge roller 200 rolls and the discharge roller 200 moves relative to the worktable, which can pull the material to be coated on the worktable.

[0031] In 3D printing technology, a target object is printed by coating and curing photocurable materials layer by layer. The thickness of each layer of photocurable material is determined by analyzing and processing the model of the target object to be printed. Therefore, each layer of photocurable material has a precise thickness requirement.

[0032] In this embodiment, the flattening component interacts with the material coated on the discharge roller 200 to flatten the photocurable material according to a preset thickness, so that the thickness of the material flowing out from the coating outlet 101 meets the printing requirements.

[0033] When the discharge roller 200 is mounted above the coating outlet 101, its axis is aligned with the centerline of the coating outlet 101 in the axial direction. The diameter of the discharge roller 200 can be smaller or larger than the width of the coating outlet 101. When the diameter of the discharge roller 200 is smaller than the width of the coating outlet 101, the difference in size is less than twice the gap width.

[0034] In this embodiment, the flattening component is disposed above the base 100; a gap is formed between the working surface of the flattening component and the output roller 200; this gap is related to the required thickness of each layer during printing. The gap width can be equal to the thickness of each layer.

[0035] In this embodiment, the worktable is positioned below the base 100. After a layer of photocurable material is coated, the worktable conveys the coated material to the area below the laser irradiation device, allowing the laser beam emitted from the device to act on the material and achieve curing. The discharge roller 200 rolls at a preset speed, and the material coats the roller. As the worktable and base 100 move relative to each other, the material is pulled and coated onto the worktable.

[0036] In one embodiment, the relative speed between the worktable and the base 100 is equal to the rolling linear speed of the discharge roller 200. Based on this, the linear displacement of the discharge roller 200 within 1 second is 1m; the relative displacement between the worktable and the base 100 is also 1m; thus, the photocurable material falling from the discharge roller 200 can be evenly coated onto the worktable without material accumulation; achieving flush coating of the photocurable material, thereby improving the accuracy of 3D printing.

[0037] In one embodiment, the base 100 includes a power zone and a flattening zone; the power zone is used to install a first power member 110 that drives the discharge roller 200 to roll, and the flattening zone is used to install a flattening assembly; the power zone and the flattening zone are respectively located on opposite sides of the coating outlet 101.

[0038] The first power component 110 may vibrate; the flattening component also has downward pressure; by setting the power zone and the flattening zone on opposite sides of the coating outlet 101 respectively, the forces on both sides of the coating outlet 101 can be basically balanced, maintaining the balance and stability of the photocurable material during coating.

[0039] In other examples, the power zone and the flattening zone may be located on the same side of the coating outlet 101, with the flattening zone close to the coating outlet 101, allowing the flattening assembly to be positioned close to the discharge roller 200. In a further example, the laser generator may be positioned close to the coating outlet 101, allowing the photocurable material to move closer to the laser generator as it exits the coating outlet 101, completing the laser printing and reducing the travel distance for movement control.

[0040] Figure 4 A schematic diagram of the flattening seat structure of a material coating apparatus according to an embodiment of this application is shown. Figure 4 As shown, the flattening assembly includes a flattening seat and a flattening roller 311. The roller shaft of the flattening roller 311 is mounted on the flattening seat. A synchronous belt 400 is sleeved on the roller shaft of the flattening roller 311, and the other end of the synchronous belt 400 is sleeved on the roller shaft of the discharge roller 200.

[0041] In this embodiment, the pressing roller 311 is driven to roll along with the active rolling of the discharge roller 200 by the synchronous belt 400, thereby achieving flattening while reducing energy consumption.

[0042] In one embodiment, the flattening assembly includes a flattening seat, a flattening roller 311, and a second power member for driving the flattening roller 311 to roll. The roller shaft of the flattening roller 311 is mounted on the flattening seat.

[0043] In this embodiment, by providing power components for the discharge roller 200 and the flattening roller 311 respectively, the gap change that occurs when the discharge roller 200 drives the flattening roller 311 to rotate can be avoided, which would affect the accuracy of the material coating thickness.

[0044] In one embodiment, the flattening roller 311 comprises a first base plate 313 and a plurality of first side plates 312, the first base plate 313 and the plurality of first side plates 312 forming an upper side opening and at least one side opening. The at least one side opening is arranged toward the coating outlet 101 so that the flattening roller 311 can be spaced apart from the discharge roller 200.

[0045] The side opening is singly sized, and the first side plate 312 opposite to the side opening is a protective plate 314 to prevent the flattening roller 311 from falling off. A triangular plate 315 is provided on the side of the protective plate 314 opposite to the side opening, and the triangular plate 315 is integrally formed with the first side plates 312 at both ends of the protective plate 314. The triangular plates 315 are respectively disposed at both ends of the protective plate 314. The triangular plates 315 ensure that the flattening seat is stably disposed on the flattening area of ​​the base 100, improving the stability of the flattening seat, the flattening roller 311, or the flattening assembly, thereby improving the stability of the material coating device. In the flattening seat, the side edge of the side opening and the opposite side edge of the side opening gradually slope outwards from the upward direction of the first base plate 313.

[0046] The flattening seat is fixed to the flattening area on the base 100. The base 100 is provided with a groove 104 that is adapted to the bottom of the first base plate 313, so that the first base plate 313 can be placed on the groove 104 and its outer edge fits.

[0047] In one example, the side edge of the groove 104 is inclined outward in the direction from bottom to top, so that the side edge of the groove 104 can fit with the side edge of the first base plate 313, so that the first base plate 313 is stably set on the base 100, and this inclined fitting arrangement can further improve the stability of the flattening assembly.

[0048] The flattening area includes a second base plate 102, on which two slide rails (304, 305) are provided, the two slide rails being respectively disposed at both ends of the second base plate 102; the flattening seat can slide on the slide rails.

[0049] One of the two slide rails is equipped with a pushing device, which is used to push the flattening seat to move along the radial direction of the flattening roller 311 to adjust the gap between the flattening roller 311 and the discharge roller 200, thereby increasing the thickness of the material coating.

[0050] In one example, the actuating device includes an actuating dimension control and a locking element; the actuating dimension control can be a micrometer, etc.

[0051] In one example, the micrometer's adjustment handle 302 can be located on the outside of the base 100, away from the discharge roller 200; in the slide rail, on the side adjacent to the adjustment handle 302, a locking element can be installed for adjusting the finished thickness and performing a locking operation.

[0052] In one example, a through hole 103 can be provided in the first base plate 313 near the slide rail for installing a locking knob 303. After the gap is adjusted, a person's finger can pass through the through hole 103 and rotate the locking knob 303 to lock it.

[0053] In one example, perforation 103 can be a square perforation 103.

[0054] In one embodiment, the system further includes an auxiliary roller 321 and an auxiliary support member. The auxiliary support member has stepped holes for mounting the roller shaft of the auxiliary roller 321. The auxiliary support member includes two second side plates 322, which are respectively fixed to two opposing first side plates 312. The auxiliary roller 321 and the flattening roller 311 are spaced apart. The gap between the auxiliary roller 321 and the flattening roller 311, and the gap between the flattening roller 311 and the discharge roller 200, are equal.

[0055] In one example, the dimensions of the two second side plates 322 are fixed, and the gap between the auxiliary roller 321 and the flattening roller 311 can be adjusted by replacing the auxiliary roller 321 with one of different diameters.

[0056] In one example, the auxiliary roller 321 has a fixed diameter, and the gap between the auxiliary roller 321 and the flattening roller 311 can be adjusted by replacing the second side plate 322 with one of different heights.

[0057] In this embodiment, the thickness of the photocurable material coated on the flattening roller 311 is controlled by the gap between the auxiliary roller 321 and the flattening roller 311. When the flattened photocurable material rolls to the discharge roller 200, it is flattened again, achieving two flattening operations, which further ensures that the thickness of the coated photocurable material meets higher precision requirements.

[0058] Other configurations of the material coating apparatus in the above embodiments can be derived from various technical solutions now and in the future known to those skilled in the art, and will not be described in detail here.

[0059] This application also provides a 3D printing device, which includes a laser emitting device, a controller, a worktable, and a material coating device in any of the above embodiments.

[0060] The material coating device also includes a third side plate, which is fixed to the side of the base 100;

[0061] The laser emitting device is located on the third side plate, on the side opposite to the discharge roller 200;

[0062] The controller controls the laser emitting device to emit laser light and controls the relative movement between the worktable and the material coating device.

[0063] In one embodiment, the material used in this application is a high-viscosity photocurable material; the viscosity range of the photocurable material can be 12000 mPa·s to 11100 mPa·s. For a photocurable material with this viscosity range, the height difference between the worktable and the base 100 can be adjusted to 5 cm to 15 cm.

[0064] The 3D printing equipment also includes a height adjustment component, which is set on the worktable or the material coating device; the height can be adjusted by adjusting the height of the worktable or the material coating device.

[0065] In one example, the height difference between the worktable and the base 100 can be adjusted according to the specific viscosity of the high-viscosity UV-curable material. Specifically, the higher the viscosity, the greater the height difference, to ensure that the UV-curable material can be effectively applied to the worktable.

[0066] Other components of the 3D printing equipment described in the above embodiments can be derived from various technical solutions that are now and will be known to those skilled in the art, and will not be described in detail here.

[0067] Figure 5 A flowchart illustrating a 3D printing method according to an embodiment of this application is shown. Figure 5 As shown, the 3D printing method includes:

[0068] S610, obtain the target object to be printed.

[0069] To obtain the target object to be printed, you can acquire the target file. Uploading the target file to the model analysis file will give you the target object contained within it. Printing based on this target object will then produce the corresponding object.

[0070] S620 generates a print trajectory based on the target object; the print trajectory includes the object trajectory and the protection trajectory. The object trajectory is the trajectory of the print target object, and the protection trajectory is the trajectory of the print closed-loop object, which surrounds the target object.

[0071] This application embodiment prints the target object and the closed-loop object simultaneously; this allows the printed closed-loop object to prevent the photocurable material from spreading outward and collapsing during the layer-by-layer coating of the photocurable material, thus avoiding thickness differences and affecting printing accuracy.

[0072] The S630 prints target objects and closed-loop objects layer by layer based on the print trajectory.

[0073] The 3D printing method provided in this application embodiment can be understood as combining a target object and a closed-loop object that is compatible with the target object to obtain a composite object. By printing the composite object layer by layer, the target object corresponding to the target object and the closed-loop object corresponding to the closed-loop object are finally printed. Since the closed-loop object surrounds the target object, it is easy to separate the target object and the closed-loop object to obtain the desired target object.

[0074] In one example, the thickness of the closed-loop object can be set to 2 to 10 cm.

[0075] The embodiments of this application employ the above-described technical solution to cure high-viscosity photocurable materials. The printing process does not require material support, and the synchronous printing based on the protective trajectory can effectively prevent material collapse, resulting in more accurate printing and higher precision of the printed items.

[0076] The three-dimensional printing method in this application embodiment can use a high-viscosity photocurable material for printing, and the coating method of the photocurable material can be the material coating device of any of the above embodiments.

[0077] The 3D printing method in this embodiment uses a high-viscosity photocurable material. Due to its high viscosity, it is in a semi-solid state. When it falls from the material coating device onto the worktable, it can fall in the form of a surface. This process can be achieved without the need for other objects to support it, which can effectively simplify the 3D printing work and improve printing efficiency.

[0078] In one embodiment, the 3D printing method of this application further includes:

[0079] Obtain the viscosity parameters of the photocurable material;

[0080] The distance between the closed-loop object and the target object is determined based on the viscosity parameter; the distance can be the maximum distance, the minimum distance, or the average distance.

[0081] In this embodiment, the closed-loop object is a closed-loop structure surrounding the target object, such as a cylindrical shape, a cuboid shape, or a shape adapted to the target object.

[0082] In one example, it could be a cylindrical structure surrounding the target object with a minimum spacing of 3cm. The printing trajectory of the cylinder can be generated by determining the center point of the target object and then determining the radius of the cylinder.

[0083] In one example, it could be a closed loop object formed by extending 3cm outwards from the outer edge of the target object.

[0084] In this embodiment of the application, by determining the distance between the closed-loop object and the target object, and then determining the closed-loop object, it is possible to ensure that the closed-loop object and the target object maintain a distance, thereby avoiding the phenomenon of the target object and the closed-loop object sticking together after printing.

[0085] In one example, the higher the viscosity of the photocurable material, the larger the spacing can be set. Conversely, the lower the viscosity of the photocurable material, the smaller the spacing can be set, provided it is easy to separate from the target object and the closed-loop object. Higher viscosity also makes it less prone to collapse.

[0086] In one implementation, the 3D printing method further includes:

[0087] Obtain the viscosity parameters of the photocurable material;

[0088] Based on viscosity parameters, determine the coating thickness of each layer of photocurable material during layer-by-layer printing;

[0089] Accordingly, step S630 includes:

[0090] The printing trajectory is generated based on the coating thickness and the target object.

[0091] The higher the viscosity of a photocurable material, the worse its flowability. Within the corresponding height range of the target object, if the shape change is not significant, a thicker layer can be printed each time to improve printing efficiency.

[0092] In one implementation, the 3D printing method further includes:

[0093] Obtain the viscosity parameters of the photocurable material;

[0094] Based on viscosity parameters, the target energy of the laser emitted by the laser emitter is determined; wherein, the target energy of the laser emitted by the laser emitter ranges from 3.11 eV to 10 eV.

[0095] Receive the real-time energy of the laser emitted by the laser transmitter;

[0096] Based on real-time energy, the laser emitter is dynamically adjusted to ensure that the real-time energy matches the target energy.

[0097] In this embodiment, a high-energy laser, such as ultraviolet light, is used for printing, which allows for faster curing and improved printing efficiency. Furthermore, high-viscosity photocurable materials can cure even faster under high-energy laser irradiation. When the material coating is thick, high energy is used to ensure timely curing of the photocurable material.

[0098] In the embodiments of this application, the target energy can be a definite energy value and a corresponding error range; or it can be a range of target energy.

[0099] If the real-time energy does not meet the target energy, the output voltage of the laser emitter can be adjusted to increase the energy emitted by the laser generator so that the emitted energy meets the target energy requirement.

[0100] In this embodiment, by dynamically adjusting the real-time energy of the laser emitter, it can be ensured that after the photocurable material is coated, the layer or subsequent layers of photocurable material can be cured under the laser of the target energy, so that the light received by each position of the target object during curing is uniform, thereby further improving the uniformity of the printed target object and further improving the printing effect of the target object.

[0101] In one implementation, the 3D printing method further includes:

[0102] Obtain the viscosity parameters of the photocurable material;

[0103] Based on viscosity parameters, determine the target height range between the printing platform and the coating exit;

[0104] Accordingly, the process of printing the target object and the closed-loop object layer by layer based on the printing trajectory also includes:

[0105] Obtain the true height between the printing platform and the coating exit;

[0106] Determine if the actual height matches the target height range. If the result is yes, start printing layer by layer.

[0107] In this embodiment, photocurable materials of different viscosities can be coated at different heights. Corresponding to different viscosities, there is a range of target heights that can be accommodated.

[0108] In the above implementation method, the viscosity parameters of the photocurable material can be obtained by manually inputting or importing them into the control center or server.

[0109] In this embodiment, by ensuring the true height between the printing platform and the coating exit before starting printing, it is ensured that this height is suitable for printing the corresponding photocurable material, thus avoiding the printing of unsuitable objects by using photocurable materials with unmatched viscosity at an inappropriate height, which would affect the printing effect.

[0110] In one embodiment, the viscosity of the photocurable material in the three-dimensional printing method of this application is 12000 mPa·s to 14000 mPa·s.

[0111] In one implementation, the 3D printing method further includes:

[0112] Obtain the starting position information on the workbench;

[0113] Based on the starting position information and the printing trajectory, the movement range of the worktable is determined.

[0114] Relative movement occurs between the worktable and the base 100. Before coating or printing, the worktable needs to return to a specific starting position. In cases where the target object is small, adjusting the configuration parameters to adjust the range of movement of the worktable relative to the base 100 can effectively reduce waste of photocurable material and save costs.

[0115] In this embodiment, the material coating device can be reciprocated relative to the worktable to avoid breakage of the photocurable material.

[0116] Figure 6 A schematic structural block diagram of a 3D printing apparatus 700 according to an embodiment of this application is shown. Figure 6 As shown, the 3D printing apparatus 700 includes:

[0117] Module 710 is used to obtain the target object to be printed;

[0118] The trajectory generation module 720 is used to generate a printing trajectory based on the target object. The printing trajectory includes the object trajectory and the protection trajectory. The object trajectory is the trajectory of the printing target object, and the protection trajectory is the trajectory of the printing closed-loop object, which surrounds the target object.

[0119] The control module 730 is used to print the target object and the closed-loop object layer by layer based on the printing trajectory.

[0120] In one embodiment, the 3D printing apparatus 700 further includes:

[0121] The viscosity acquisition module is used to acquire the viscosity parameters of the photocurable material;

[0122] The spacing determination module is used to determine the spacing between the closed-loop object and the target object based on viscosity parameters; the spacing can be the maximum spacing, minimum spacing, or average spacing.

[0123] In one embodiment, the 3D printing apparatus 700 further includes:

[0124] The viscosity acquisition module is used to acquire the viscosity parameters of the photocurable material;

[0125] The thickness determination module is used to determine the coating thickness of the photocurable material in the case of layer-by-layer printing based on viscosity parameters.

[0126] The trajectory generation module 720 is used to generate printing trajectories based on the coating thickness and the target object.

[0127] In one embodiment, the 3D printing apparatus 700 further includes:

[0128] The viscosity acquisition module is used to acquire the viscosity parameters of the photocurable material;

[0129] The target energy determination module is used to determine the target energy of the laser emitted by the laser emitter based on the viscosity parameter; wherein the target energy of the laser emitted by the laser emitter is in the range of 3.11eV to 10eV;

[0130] The real-time energy receiving module is used to receive the real-time energy of the laser emitted by the laser transmitter.

[0131] The energy adjustment module is used to dynamically adjust the laser emitter based on real-time energy to ensure that the real-time energy matches the target energy.

[0132] In one embodiment, the 3D printing apparatus 700 further includes:

[0133] The viscosity acquisition module is used to acquire the viscosity parameters of the photocurable material;

[0134] The target height determination module is used to determine the target height range between the printing platform and the coating exit based on viscosity parameters.

[0135] Accordingly, the control module 730 is also used for:

[0136] Obtain the true height between the printing platform and the coating exit;

[0137] Determine if the actual height matches the target height range. If the result is yes, start printing layer by layer.

[0138] In one embodiment of this application, the viscosity of the photocurable material is 12000 mPa·s to 14000 mPa·s.

[0139] In one embodiment, the 3D printing apparatus 700 further includes:

[0140] The starting point acquisition module is used to acquire the starting point position information on the workbench;

[0141] The movement range determination module is used to determine the movement range of the worktable based on the starting position information and the printing trajectory.

[0142] The functions of each module in each device in the embodiments of this application can be found in the corresponding descriptions in the above methods, and will not be repeated here.

[0143] Figure 7 A structural block diagram of an electronic device according to an embodiment of this application is shown. Figure 7As shown, the electronic device includes a memory 810 and a processor 820. The memory 810 stores instructions that can be executed on the processor 820. When the processor 820 executes the instructions, it implements the 3D printing method in the above embodiments. The number of memories 810 and processors 820 can be one or more. This electronic device is intended to represent various forms of digital computers, such as servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0144] The electronic device may also include a communication interface 830 for communicating with external devices and exchanging data. The devices are interconnected using different buses and can be mounted on a common motherboard or otherwise as needed. The processor 820 can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). The bus can be divided into address buses, data buses, control buses, etc. For ease of illustration, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0145] Optionally, in a specific implementation, if the memory 810, processor 820, and communication interface 830 are integrated on a single chip, then the memory 810, processor 820, and communication interface 830 can communicate with each other through an internal interface.

[0146] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. General-purpose processors can be microprocessors or any conventional processor. It is worth noting that the processor can be a processor supporting the Advanced Reduced Instruction Set Computing (RISC) machine (ARM) architecture.

[0147] This application provides a computer-readable storage medium (such as the memory 810 described above) that stores computer instructions, which, when executed by a processor, implement the method provided in this application.

[0148] Optionally, the memory 810 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the use of the electronic device according to the 3D printing method. Furthermore, the memory 810 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 810 may optionally include memory remotely located relative to the processor 820, and these remote memories can be connected to the electronic device of the 3D printing method via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0149] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0150] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0151] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more (two or more) executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0152] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0153] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0154] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0155] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0156] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0157] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0158] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0159] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0160] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A three-dimensional printing method, characterized in that, include: Obtain the viscosity parameters of the target object to be printed and the photocurable material; Generate a printing trajectory based on the target object; The printing trajectory includes an object trajectory and a protection trajectory. The object trajectory is the trajectory for printing the target object, and the protection trajectory is the trajectory for printing a closed-loop object that surrounds the target object. Based on the viscosity parameter, adjust the height difference between the worktable and the base of the material coating device; The photocurable material falls from the material coating device into the worktable in a surface-like manner; wherein, the material coating device includes: a base, the base having a coating outlet for the material to flow out from the coating outlet; a discharge roller, the roller shaft of the discharge roller being mounted above the coating outlet; a flattening member, the flattening member being disposed above the base; the flattening member including a flattening roller, the working surface of the flattening member being spaced apart from the discharge roller; the worktable being disposed below the base, the discharge roller rolling at a preset speed, the material covering the discharge roller, and when the worktable and the base move relative to each other, pulling the material onto the worktable; The worktable conveys the coated photocurable material to the area below the laser irradiation device, which then prints the target object and the closed-loop object based on the printing trajectory.

2. The three-dimensional printing method according to claim 1, characterized in that, Also includes: The distance between the closed-loop object and the target object is determined based on the viscosity parameter. The spacing can be the maximum spacing, the minimum spacing, or the average spacing.

3. The three-dimensional printing method according to claim 1, characterized in that, Also includes: Based on the viscosity parameters, determine the coating thickness of each layer of photocurable material during layer-by-layer printing; Accordingly, generating the printing trajectory based on the target object includes: The printing trajectory is generated based on the coating thickness and the target object.

4. The three-dimensional printing method according to claim 1, characterized in that, Also includes: Based on the viscosity parameter, the target energy of the laser emitted by the laser emitter is determined; wherein the target energy of the laser emitted by the laser emitter is in the range of 3.11 eV to 10 eV; Receive the real-time energy of the laser emitted by the laser emitter; Based on the real-time energy, the laser emitter is adjusted so that the real-time energy matches the target energy.

5. The three-dimensional printing method according to claim 1, characterized in that, Also includes: Based on the viscosity parameter, determine the target height range between the printing platform and the coating exit; Accordingly, the step of printing the target object and the closed-loop object layer by layer based on the printing trajectory also includes: Obtain the actual height between the printing platform and the coating exit; Determine whether the actual height matches the target height range. If the determination result is yes, start layer-by-layer printing.

6. The three-dimensional printing method according to any one of claims 2 to 5, characterized in that, The viscosity of the photocurable material is 12000 mPa·s to 14000 mPa·s.

7. The three-dimensional printing method according to claim 1, characterized in that, Also includes: Obtain the starting position information on the workbench; Based on the starting point location information and the printing trajectory, the movement range of the worktable is determined.

8. A three-dimensional printing apparatus, characterized in that, include: The acquisition module is used to acquire the viscosity parameters of the target object to be printed and the photocurable material; A trajectory generation module is used to generate a printing trajectory based on the target object; The printing trajectory includes an object trajectory and a protection trajectory. The object trajectory is the trajectory for printing the target object, and the protection trajectory is the trajectory for printing a closed-loop object that surrounds the target object. The control module is used to adjust the height difference between the worktable and the base of the material coating device based on the viscosity parameter. The photocurable material falls from the material coating device into the worktable in a surface-like manner; wherein, the material coating device includes: a base, the base having a coating outlet for the material to flow out from the coating outlet; a discharge roller, the roller shaft of the discharge roller being mounted above the coating outlet; a flattening member, the flattening member being disposed above the base; the flattening member including a flattening roller, the working surface of the flattening member being spaced apart from the discharge roller; the worktable being disposed below the base, the discharge roller rolling at a preset speed, the material covering the discharge roller, and when the worktable and the base move relative to each other, pulling the material onto the worktable; The worktable conveys the coated photocurable material to the area below the laser irradiation device, which then prints the target object and the closed-loop object based on the printing trajectory.

9. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the 3D printing method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the 3D printing method as described in any one of claims 1-7.

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