3D printing ray machine system and 3D printing equipment

Abstract

The invention discloses a 3D printing light machine system and 3D printing equipment, and relates to the technical field of 3D printing, and the system comprises an ultraviolet laser light source, a beam expanding module, a dodging module, a relay module and a digital micromirror device which are sequentially arranged along a light path; the beam expanding module is used for receiving the ultraviolet light beams emitted by the ultraviolet laser light source and expanding the ultraviolet light beams to obtain expanded light beams; the dodging module is used for receiving the expanded light beam and dodging the expanded light beam to obtain a dodging light beam; the relay module is used for receiving the dodging light beam and adjusting the light beam angle and size of the dodging light beam to obtain a shaped light beam, and the focal length of the relay module is determined by the light spot size of the emergent surface of the dodging module and the aperture angle of the digital micromirror device; and the digital micromirror device is used for receiving the shaping light beam and controlling the reflection direction of the shaping light beam so as to form a target image to be projected on the printing area. The optical path layout can be optimized while the overall performance of the 3D printing optical machine is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of 3D (Three Dimensions) printing technology, and in particular to a 3D printing optical machine system and a 3D printing device. Background Art

[0002] In recent years, the market scale of 3D printing technology has continued to expand and develop. DLP 3D (Digital Light Processing Three Dimensions) printing technology has been widely used due to its high printing accuracy, fast speed, and high surface finish of the molded objects.

[0003] However, the internal structure of the DLP 3D printing optical machine relies on a large number of lens components. The optical path layout composed of a large number of lens components is relatively complex. This feature directly increases the structural volume of the optical machine, and at the same time brings about an increase in the production cost, processing complexity and maintenance cost of the 3D printing optical machine, which is not conducive to the further popularization and application of 3D printing optical machines.

[0004] In summary, how to optimize the optical path layout while ensuring the overall performance of the 3D printing optical machine has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] The main purpose of this application is to provide a 3D printing optical machine system and a 3D printing device, aiming to ensure the overall performance of the 3D printing optical machine while optimizing the optical path layout.

[0006] To achieve the above-mentioned purpose, the present application proposes a 3D printing optical machine system, which includes: an ultraviolet laser light source, a beam expansion module, a light homogenization module, a relay module and a digital micromirror device arranged in sequence along the optical path;

[0007] The beam expansion module is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and expand the ultraviolet light beam to obtain an expanded light beam;

[0008] The homogenizing module is used to receive the expanded light beam and homogenize the expanded light beam to obtain a homogenized light beam;

[0009] The relay module is used to receive the homogenized light beam and adjust the beam angle and size of the homogenized light beam to obtain a shaped light beam, wherein the focal length of the relay module is determined by the spot size of the exit surface of the homogenized light module and the aperture angle of the digital micromirror device;

[0010] The digital micromirror device is used to receive the shaped light beam and control the reflection direction of the shaped light beam to form a target image to be projected on the printing area.

[0011] In one embodiment, the 3D printing optical machine system further includes a heat dissipation module, which includes a control unit, a temperature detection unit, a fan, a TEC (Thermo Electric Cooler) radiator and a vapor chamber VC (Vapor Chamber, vacuum chamber vapor chamber heat dissipation technology) unit;

[0012] The vapor chamber VC unit is arranged close to the ultraviolet laser light source, and a side of the vapor chamber VC unit away from the ultraviolet laser light source is close to the TEC radiator and / or the fan, and the vapor chamber VC unit is used for heat exchange with the ultraviolet laser light source;

[0013] The temperature detection unit is configured to detect the light source temperature value of the ultraviolet laser light source;

[0014] The control unit is configured to switch the operating state of at least one of the TEC radiator and the fan based on the temperature value of the light source.

[0015] In one embodiment, the fan has at least two speed gears, the TEC radiator has at least two temperature control gears, and the control unit is used to:

[0016] Obtaining the temperature value of the light source;

[0017] Based on a convergent heat dissipation strategy prediction AI (Artificial Intelligence) model, a target combined heat dissipation strategy matching the light source temperature value is predicted, wherein the target combined heat dissipation strategy includes a target speed gear and a target temperature control gear;

[0018] The fan is controlled to operate according to the target speed gear, and the TEC radiator is controlled to operate according to the target temperature control gear.

[0019] In one embodiment, the control unit is further used for:

[0020] Inputting the light source temperature value into a converged heat dissipation strategy prediction AI model to obtain intermediate parameter information output by the heat dissipation strategy prediction AI model;

[0021] Based on the preset parameter mapping relationship, query and obtain the speed gear and temperature control gear mapped by the intermediate parameter information;

[0022] According to the speed gear and temperature control gear mapped by the intermediate parameter information, a target combined heat dissipation strategy that matches the light source temperature value is determined, wherein the target combined heat dissipation strategy refers to a combined heat dissipation strategy with the lowest heat dissipation power consumption when the operating performance of the ultraviolet laser light source reaches a preset performance standard.

[0023] In one embodiment, when the light source temperature value is greater than a first preset value and less than or equal to a second preset value, the control unit controls the fan to run at a target speed gear;

[0024] Wherein, the second preset value is greater than the first preset value.

[0025] In one embodiment, when the light source temperature value is greater than the second preset value and less than or equal to the third preset value, the control unit controls the TEC radiator to operate at the target temperature control gear;

[0026] Wherein, the third preset value is greater than the second preset value.

[0027] In one embodiment, when the light source temperature value is greater than a third preset value, the control unit controls the fan to operate at a target speed gear, and controls the TEC radiator to operate at a target temperature control gear.

[0028] In one embodiment, the beam expansion module comprises a negative lens and a positive lens sequentially arranged along the optical path, and the distance between the negative lens and the positive lens is determined by the focal length of the negative lens and the focal length of the positive lens;

[0029] The negative lens is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and diverge the ultraviolet light beam to obtain an intermediate expanded light beam;

[0030] The positive lens is used to converge the intermediate expanded light beam to obtain an expanded light beam, wherein the diffusion multiple of the expanded light beam is determined by the focal length of the negative lens and the focal length of the positive lens.

[0031] In one embodiment, the beam expansion module is a diffuser, and the diffuser is a flat-top diffuser or a Gaussian diffuser;

[0032] The diffuser is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and expand the ultraviolet light beam to obtain an expanded light beam, wherein the diffusion multiple of the expanded light beam is determined by the diffusion angle of the diffuser, the spacing between the diffuser and the uniform light module, and the incident light spot size of the diffuser.

[0033] In addition, to achieve the above objectives, the present application also proposes a 3D printing device, which includes the 3D printing optical-mechanical system as described above.

[0034] The present application proposes a 3D printing optical machine system, which includes an ultraviolet laser light source, a beam expansion module, a homogenizing module, a relay module and a digital micromirror device arranged in sequence along an optical path; the beam expansion module is used to receive an ultraviolet light beam emitted by the ultraviolet laser light source, and expand the ultraviolet light beam to obtain an expanded light beam; the homogenizing module is used to receive the expanded light beam, and homogenize the expanded light beam to obtain a homogenized light beam; the relay module is used to receive the homogenized light beam, and adjust the beam angle and size of the homogenized light beam to obtain a shaped light beam, wherein the focal length of the relay module is determined by the light spot size of the exit surface of the homogenizing module and the aperture angle of the digital micromirror device; the digital micromirror device is used to receive the shaped light beam and control the reflection direction of the shaped light beam to form a target image projected on the printing area.

[0035] Thus, compared with the traditional DLP 3D printing optical machine, the present application adopts an ultraviolet laser light source and utilizes a combination of a beam expansion module, a light homogenizing module and a relay module. The relay module adjusts the angle and size of the light beam according to the spot size of the light homogenizing module output surface and the aperture angle of the digital micromirror device to generate a shaped light beam that meets the requirements of the digital micromirror device, making the optical path more concise and efficient, and reducing the number of lens components, thereby optimizing the optical path layout while ensuring the overall performance of the 3D printing optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the system structure provided for the first embodiment of the 3D printing optical machine system of the present application;

[0039] Figure 2 A schematic diagram of the structure of a beam expansion module provided in Example 1 of the 3D printing optical machine system of this application;

[0040] Figure 3 A schematic diagram of a first exemplary system structure provided for the first embodiment of the 3D printing optical-mechanical system of the present application;

[0041] Figure 4 A schematic diagram of a second exemplary system structure provided for the first embodiment of the 3D printing optical-mechanical system of the present application;

[0042] Figure 5Another system structure schematic diagram provided for the second embodiment of the 3D printing optical machine system of the present application;

[0043] Figure 6 A schematic diagram of the heat dissipation module structure provided in Example 2 of the 3D printing optical machine system of this application.

[0044] Figure 1 , Figure 5 and Figure 6 Description of Figure Numbers:

[0045]

[0046]

[0047] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0049] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0050] In recent years, the market size of 3D printing technology has continued to expand and develop, and DLP 3D printing technology has been widely used due to its high printing accuracy, fast speed, and high surface finish of the molded objects.

[0051] However, the internal structure of the DLP 3D printing optical machine relies on a large number of lens components. The optical path layout composed of a large number of lens components is relatively complex. This feature directly increases the structural volume of the optical machine, and at the same time brings about an increase in the production cost, processing complexity and maintenance cost of the 3D printing optical machine, which is not conducive to the further popularization and application of 3D printing optical machines.

[0052] In summary, how to optimize the optical path layout while ensuring the overall performance of the 3D printing optical machine has become a technical problem that needs to be solved urgently in this field.

[0053] The main solution of the embodiment of the present application is: Figure 1As shown, a 3D printing optical machine system 10 is provided, and the 3D printing optical machine system 10 includes an ultraviolet laser light source 01, a beam expansion module 02, a light homogenization module 03, a relay module 04 and a digital micromirror device 05 which are sequentially arranged along the optical path; the beam expansion module 02 is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source 01, and expand the ultraviolet light beam to obtain an expanded light beam; the light homogenization module 03 is used to receive the expanded light beam, and homogenize the expanded light beam to obtain a homogenized light beam; the relay module 04 is used to receive the homogenized light beam, and adjust the beam angle and size of the homogenized light beam to obtain a shaped light beam; the digital micromirror device 05 is used to receive the shaped light beam, and control the reflection direction of the shaped light beam to form a target image projected on the printing area.

[0054] Compared with the traditional DLP 3D printing machine, the present application adopts an ultraviolet laser light source and utilizes a combination of a beam expansion module, a light homogenizing module and a relay module 04. The relay module 04 adjusts the angle and size of the light beam according to the spot size of the light homogenizing module output surface and the aperture angle of the digital micromirror device 05 to generate a shaped light beam that meets the requirements of the digital micromirror device 05, making the optical path more concise and efficient, and reducing the number of lens components, thereby optimizing the optical path layout while ensuring the overall performance of the 3D printing machine.

[0055] Based on this, the present application embodiment provides a 3D printing optical machine system 10, referring to Figure 1 , Figure 1 Schematic diagram of the system structure of the first embodiment of the 3D printing optical-mechanical system 10 of the present application.

[0056] In this embodiment, the 3D printing optical machine system 10 includes: an ultraviolet laser light source 01, a beam expansion module 02, a light homogenization module 03, a relay module 04 and a digital micromirror device 05 which are sequentially arranged along the optical path;

[0057] In this embodiment, the 3D printing optical machine system 10 includes an ultraviolet laser light source 01, a beam expansion module 02, a uniform light module 03, a relay module 04 and a digital micromirror device 05 arranged in sequence along the optical path. It uses the principle of photocuring to control the projection path and intensity of the light beam to cure the material layer by layer, thereby constructing a three-dimensional structure.

[0058] It is worth mentioning that 3D printing is a manufacturing technology that uses light beams to quickly solidify liquid materials into 3D objects. The key to its optical design is to provide a uniform and efficient light illumination system to ensure printing quality. In this embodiment, an ultraviolet laser light source 01 is used as the light source. The laser light source has a small spot size and a small angle, and can be approximately considered as a beam of parallel light, which determines that it has a small optical expansion. The optical expansion U at the light source in illumination optics can be calculated by the following formula:

[0059] U = π*n2*sin2(θ)*A;

[0060] Where n is the refractive index of the dielectric material, A is the light-emitting area, and θ is the light-emitting angle.

[0061] For a LED (Light Emitting Diode) Lambertian light source with a light-emitting surface diameter of 1 mm, its optical extension is U = 2.4649, while for a UV laser light source with a light-emitting surface diameter of 1 mm, its divergence angle is about 5°, and its optical extension is calculated to be about 0.02, which is much smaller than that of an LED light source. This means that under the same digital micromirror device 05 model, the geometric efficiency that can be obtained by using a laser light source is extremely high, usually greater than 80%, and the light energy utilization rate is high.

[0062] The F number of an optical system is the ratio of the system's equivalent focal length to the entrance pupil diameter, as shown in the following formula:

[0063] F#=f / D; where F# refers to the F number of the optical system, f is the equivalent focal length, and D is the entrance pupil diameter.

[0064] For DLP lighting system, the formula can be rewritten as:

[0065] F#=1 / 2sinu;

[0066] Where u is the beam divergence angle.

[0067] According to the conservation principle of optical etendue, a smaller optical etendue at the light source can allow the light beam divergence angle u irradiated on the surface of the digital micromirror device 05 to be compressed when designing the lighting architecture to increase its F number. The improvement of the optical-mechanical F number usually means that the optical-mechanical contrast and uniformity can be improved, and at the same time, the aberration in the imaging can be reduced, the image blur caused by the diffraction of the light beam can be reduced, and the imaging quality can be improved.

[0068] Therefore, the ultraviolet laser light source 01 is used in this embodiment, and its light source divergence angle is smaller and the optical extension is smaller. It has the following performance advantages: first, it can effectively improve the energy utilization rate of the light source and reduce the heat generation in the optical path; second, the laser light source itself also has the characteristics of high brightness, which means that a higher picture brightness can be obtained in the optical machine; third, the use of laser light source for optical machine design can also effectively improve the picture contrast and reduce stray light, which is more beneficial to the final product printing effect; fourth, the laser light source component generates less heat and has a longer life than LED.

[0069] The beam expansion module 02 is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source 01 and expand the ultraviolet light beam to obtain an expanded light beam;

[0070] In this embodiment, the beam expansion module 02 receives the ultraviolet light beam emitted by the ultraviolet laser light source 01 and performs beam expansion processing on it, wherein beam expansion refers to expanding the diameter of the light beam while keeping the divergence angle of the light beam unchanged or slightly reducing it, thereby increasing the coverage area of ​​the light beam and the uniformity of energy distribution.

[0071] The homogenizing module 03 is used to receive the expanded light beam and homogenize the expanded light beam to obtain a homogenized light beam;

[0072] In this embodiment, the homogenizing module 03 receives the light beam processed by the beam expanding module 02, i.e., the beam expanding light, and performs further homogenizing processing on it, wherein homogenizing refers to making the intensity distribution of the light beam uniform to ensure that the material can be evenly exposed to light and cured during the printing process.

[0073] The relay module 04 is used to receive the homogenized light beam and adjust the beam angle and size of the homogenized light beam to obtain a shaped light beam, wherein the focal length of the relay module 04 is determined by the light spot size of the exit surface of the homogenized light module 03 and the aperture angle of the digital micromirror device 05;

[0074] In this embodiment, the relay module 04 receives the light beam processed by the homogenizing module 03, i.e., the homogenizing light beam, and adjusts the beam angle and size of the homogenizing light beam to fine-tune the shape, direction and / or intensity of the light beam according to specific printing requirements, thereby ensuring that the light beam can be accurately projected to the designated printing area.

[0075] The focal length of the relay module 04 is determined by the light spot size of the exit surface of the homogenizing module 03 and the aperture angle of the digital micromirror device 05. Specifically, the focal length of the relay module 04 is f=D / 2tanu, wherein D represents the light spot size of the exit surface of the homogenizing module, reflecting the diameter of the homogenizing light beam when it leaves the homogenizing module 03, and u represents the aperture angle of the digital micromirror device 05, which determines the maximum angle range of the light beam that the DMD (Digital Micromirror Device) can receive.

[0076] In practical applications, after the spot size D of the exit surface of the homogenizing module 03 and the aperture angle u of the digital micromirror device 05 are determined, the focal length f required by the relay module 04 is obtained by calculation, thereby ensuring that the shaped light beam can be accurately projected onto the DMD to form a clear and accurate target image, thereby ensuring the stability and reliability of the 3D printing optical system 10 in various application scenarios.

[0077] The digital micromirror device 05 is used to receive the shaped light beam and control the reflection direction of the shaped light beam to form a target image projected on the printing area.

[0078] In this embodiment, DMD (digital micromirror device) is a control element in the 3D printing optical machine system 10. In the 3D printing optical machine system 10, the digital micromirror device 05 is composed of millions of tiny mirrors, each of which can independently control its switching state and tilt angle.

[0079] When the shaped light beam is irradiated onto the digital micromirror device 05, the reflection direction of the light beam can be controlled by controlling the state of each reflector on the digital micromirror device 05, thereby realizing accurate projection of the target image. During the 3D printing process, the digital micromirror device 05 adjusts the state of each reflector in real time according to the printing data, projects the light beam to the correct position of the printing area, and forms the desired three-dimensional structure.

[0080] In a feasible embodiment, the beam expansion module 02 includes a negative lens and a positive lens sequentially arranged along the optical path, and the distance between the negative lens and the positive lens is determined by the focal length of the negative lens and the focal length of the positive lens;

[0081] A negative lens is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and diverge the ultraviolet light beam to obtain an intermediate expanded light beam;

[0082] The positive lens is used to converge the intermediate expanded beam to obtain an expanded beam, wherein the diffusion multiple of the expanded beam is determined by the focal length of the negative lens and the focal length of the positive lens.

[0083] In this embodiment, if Figure 2 As shown, the negative lens first receives the ultraviolet light beam from the ultraviolet laser light source and diverges the ultraviolet light beam to form an intermediate expanded beam; then, the positive lens converges the intermediate expanded beam to obtain an expanded beam.

[0084] In this process, the distance between the negative lens and the positive lens and the diffusion factor of the expanded light beam are determined by the focal length of the negative lens and the focal length of the positive lens. Specifically, the distance between the negative lens and the positive lens d = F1 + F2, and the diffusion factor of the expanded light beam M = -F1 / F2, wherein F1 represents the focal length of the negative lens, and F2 represents the focal length of the positive lens.

[0085] Therefore, the beam expansion module 02 realizes efficient beam expansion processing of the ultraviolet light beam by combining the optical properties of the negative lens and the positive lens. At the same time, by accurately controlling the distance between the negative lens and the positive lens and the diffusion multiple of the expanded light beam, it ensures that the light beam can maintain the best transmission state when passing through the beam expansion module 02, thereby achieving efficient and stable beam expansion effect, providing a stable and reliable beam source for the 3D printing optical machine system.

[0086] In another feasible embodiment, the beam expansion module 02 is a diffuser, and the diffuser is a flat-top diffuser or a Gaussian diffuser;

[0087] The diffuser is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and expand the ultraviolet light beam to obtain an expanded light beam, wherein the diffusion multiple of the expanded light beam is determined by the diffusion angle of the diffuser, the spacing between the diffuser and the uniform light module, and the incident light spot size of the diffuser.

[0088] In this embodiment, the diffusion module can be a diffusion sheet, which is a flat-top diffusion sheet or a Gaussian diffusion sheet. Among them, the light spot energy obtained by the flat-top diffusion sheet is more uniform, and the production cost of the Gaussian diffusion sheet is lower. In actual application scenarios, it can be selected according to needs.

[0089] The diffuser is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source, and expand the ultraviolet light beam to obtain an expanded light beam, wherein the diffusion factor of the expanded light beam is determined by the diffusion angle of the diffuser, the spacing between the diffuser and the homogenizing module, and the incident light spot size of the diffuser. Specifically, the diffusion factor of the expanded light beam M=(2Dtanα+A) / A, wherein α represents the diffusion angle of the diffuser, D represents the spacing between the diffuser and the homogenizing module, and A represents the incident light spot size of the diffuser.

[0090] In addition, in a feasible embodiment, the relay module 04 includes a first lens and a second lens, and the first lens and the second lens are glass spherical lenses;

[0091] The first lens is used to receive the uniform light beam and perform preliminary beam shaping on the uniform light beam to obtain an intermediate shaped beam;

[0092] In this embodiment, the relay module 04 includes a first lens and a second lens, and both the first lens and the second lens are designed as glass spherical lenses.

[0093] The first lens is used to receive the homogenized light beam processed by the homogenization module 03. After receiving the homogenized light beam, the first lens performs preliminary beam shaping processing on the light beam to adjust the divergence angle and spot shape of the light beam to make it closer to the target shape. After the preliminary beam shaping processing by the first lens, an intermediate shaped light beam is obtained, and the intermediate shaped light beam is a light beam that has been preliminarily adjusted.

[0094] The second lens is used to perform fine beam shaping on the intermediate shaped beam to obtain a shaped beam.

[0095] The second lens receives the light beam processed by the first lens, i.e., the intermediate shaped light beam, and performs fine shaping on the intermediate shaped light beam to achieve higher precision control of the light beam. Under the action of the second lens, the spot shape, size and divergence angle of the intermediate shaped light beam are further shaped to obtain a shaped light beam.

[0096] In addition, in a feasible embodiment, the relay module 04 may be provided with only one lens, and the lens is used to adjust the parameters such as the divergence angle and the spot shape of the received light beam to obtain a shaped light beam that better meets the printing requirements. By reducing one lens, the advantages of lower cost and smaller structure size are achieved.

[0097] In addition, in a feasible embodiment, the relay module 04 further includes a prism;

[0098] The prism is used to receive the shaped light beam and reflect the shaped light beam to the digital micromirror device 05.

[0099] In this embodiment, the relay module 04 also includes a prism, which is arranged between the second lens and the digital micromirror device 05. The prism is used to receive the light beam processed by the relay module 04, that is, the shaped light beam, and project the shaped light beam to the digital micromirror device 05, and then through the control of the digital micromirror device 05, the light beam is guided to the printing area to form the desired target image.

[0100] It should be noted that the prism in this embodiment can specifically be a TIR (Total Internal Reflection) prism, which is made of optical glass material and composed of two triangular prisms, and its cross-section is usually an isosceles right triangle. Its core working principle is based on the phenomenon of total internal reflection, that is, when light is incident from a dense medium into a sparse medium and the incident angle is greater than the critical angle of total internal reflection, the light will be completely reflected at the interface and will not be refracted into another medium. In the 3D printing optical system 10, the TIR prism can change the light path, improve the utilization rate of light energy, provide uniform light distribution, and can also realize functions such as deflection or focusing of light.

[0101] In addition, in a feasible embodiment, the 3D printing optical machine system 10 further includes a turning device, which is disposed in the light beam propagation path and is used to turn the light path of the light beam.

[0102] In this embodiment, the 3D printing optical system 10 also includes a turning device, which is arranged in the light beam propagation path and is used to turn the light path of the light beam, that is, to change the transmission direction of the light beam, so that the 3D printing optical system 10 can be more compactly arranged and adapt to different 3D printing equipment space layout requirements. At the same time, it avoids unnecessary loss of the light beam during the transmission process, ensuring printing accuracy and efficiency.

[0103] In addition, in a feasible embodiment, the 3D printing optical machine system 10 further includes a projection lens;

[0104] The projection lens is used to project the target image formed by the digital micromirror device 05 onto the printing area.

[0105] In this embodiment, the 3D printing optical-mechanical system 10 further includes a projection lens, which is used to project the target image formed on the digital micromirror device 05 to the printing area.

[0106] Specifically, the digital micromirror device 05 can quickly switch the on / off state of the lens through a tiny lens array according to a preset pattern or structure, thereby forming a target image on the surface of the digital micromirror device 05, and the projection lens magnifies the target image and projects it clearly onto the printing material, thereby achieving high-precision 3D printing.

[0107] By adjusting the focal length and aberration correction of the projection lens, the system can achieve precise control of the printing area, thereby printing complex and detailed 3D structures.

[0108] In addition, in a feasible embodiment, the light homogenization module 03 is a compound eye structure.

[0109] In this embodiment, the light homogenization module 03 of the 3D printing optical system 10 adopts a compound eye structure, wherein the compound eye structure is a special optical element designed to imitate insect eyes, composed of multiple small lenses or reflectors, which can achieve uniform distribution and focusing of the light beam.

[0110] In the 3D printing optical system 10, the light homogenization module 03 can ensure that the light beam has uniform intensity and distribution before being projected onto the digital micromirror device 05. Through the special design of the compound eye structure, the light beam can be effectively dispersed and refocused, thereby eliminating the problems of light spot and uneven light intensity, ensuring the stability and consistency of the printing process, thereby improving the printing quality.

[0111] For example, to help understand the 3D printing optical machine system 10 in the above embodiment, two feasible system schematic diagrams are provided below for illustration, specifically:

[0112] In the first example, refer to Figure 3 , specifically:

[0113] After the UV-laser (ultraviolet laser beam) emitted by the ultraviolet laser light source 01 is emitted, it enters the beam expansion module 02 composed of the negative lens C1 and the positive lens C2, so that the spot size is enlarged to cover more compound eye small units, thereby enabling the optical machine to obtain higher brightness uniformity. The light beam is then homogenized by the compound eye (i.e., the homogenization module 03), and after emission, it passes through C3 (i.e., the first lens), the reflector (i.e., the turning device), C4 (i.e., the second lens), and the TIR (Total Internal Reflection) prism in turn to enter the DMD effective area, where the C3 and C4 integral lenses and the TIR prism constitute the relay module 04. For the DMD chip, the incident light is required to meet certain angle distribution requirements, and the TIR prism requires certain incident and exit angles to ensure that the incident light can be totally reflected and the exit light does not. The critical angle of total reflection can be calculated by the following formula:

[0114] θc=arcsin(1 / n);

[0115] Where n is the refractive index of the prism material;

[0116] In this example, it should be noted that a reflector can be added between the C3 and C4 lenses to turn the light path as needed to reduce the size of the architecture. The light spot after the relay system is adapted to the size of the DMD effective area, and the light beam is reflected by the DMD micromirror into the lens and finally forms an image on the receiving surface.

[0117] In the second example, see Figure 4 , specifically:

[0118] The UV-laser (ultraviolet laser beam) emitted by the ultraviolet laser light source 01 enters the beam expansion module 02 composed of a diffuser after emission. After passing through the diffuser, the angle of the light is magnified. After a certain distance of transmission, the spot size is enlarged and enters the compound eye (i.e., the light uniformity module 03). The spot size magnified by the diffuser increases with the increase of the transmission distance and the increase of the diffusion angle. It should be noted that the diffusion angle cannot be increased indefinitely to avoid energy loss due to exceeding the angle range that the compound eye can accommodate. In practical applications, the two parameters can be adjusted and optimized according to the performance, size and other specifications. After the light beam is uniformed by the compound eye, it passes through C3 (i.e., the first lens), the reflector (i.e., the turning device), C4 (i.e., the second lens), and the TIR prism in turn to enter the DMD effective area. The light beam is reflected by the DMD micromirror and enters the lens to form an image on the receiving surface.

[0119] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction and will not be repeated later.

[0120] Heat dissipation is an important issue that cannot be ignored in the 3D printing optical machine system 10. Poor heat dissipation will affect the power stability of the optical machine and thus affect the printing effect. The current heat dissipation solution on the 3D printing optical machine system is mainly through fan heat dissipation, heat sink heat dissipation, etc.

[0121] However, although these heat dissipation solutions can alleviate the heating problem to a certain extent, it is often difficult to strike the best balance between the printing effect and power consumption of the optical machine.

[0122] In this regard, the 3D printing optical machine system 10 provided in this embodiment also includes a heat dissipation module 06, and the heat dissipation module 06 includes a control unit 1, a temperature detection unit 2, a fan 3, a TEC radiator 4 and a heat spreader VC unit 5; the heat spreader VC unit 5 is arranged close to the ultraviolet laser light source 01, and the side of the heat spreader VC unit 5 away from the ultraviolet laser light source 01 is close to the TEC radiator 4 and / or the fan 3, and the heat spreader VC unit 5 is used for heat exchange with the ultraviolet laser light source 01; the temperature detection unit 2 is configured to detect the light source temperature value of the ultraviolet laser light source 01; the control unit 1 is configured to switch the operating state of at least one of the TEC radiator 4 and the fan 3 based on the light source temperature value.

[0123] This embodiment controls the TEC radiator 4 and the fan 3 to be in different operating states at different light source temperatures, so as to quickly dissipate heat from the ultraviolet laser light source 01, thereby avoiding performance problems caused by excessive heating of the ultraviolet laser light source 01. For example, excessive heating of the ultraviolet laser light source 01 will lead to poor power stability of the emitted ultraviolet light, thereby affecting the printing effect of the 3D printing optical machine system 10. At the same time, through the intelligent heat dissipation control mechanism of this embodiment, it is also possible to avoid excessive power consumption. While controlling the heat dissipation, it is also possible to well reduce the operating power consumption of the 3D printing optical machine system 10, improve the endurance of the 3D printing optical machine system 10, and effectively realize the ability to dynamically adjust the heat dissipation strategy according to the current light source temperature information, so as to achieve the best balance between the optical machine printing effect and power consumption, thereby solving the problem that the heat dissipation method in the related technology is difficult to take into account the endurance and printing effect of the 3D printing optical machine system 10.

[0124] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0125] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic diagram of the structure of the 3D printing optical machine system 10 in this embodiment, Figure 6 Schematic diagram of the structure of the heat dissipation module 06 in this embodiment.

[0126] The 3D printing optical machine system 10 further includes a heat dissipation module 06, which includes a control unit 1, a temperature detection unit 2, a fan 3, a TEC radiator 4 and a heat spreader VC unit 5;

[0127] The heat spreader VC unit 5 is arranged close to the ultraviolet laser light source 01, and the side of the heat spreader VC unit 5 away from the ultraviolet laser light source 01 is close to the TEC heat sink 4 and / or the fan 3, and the heat spreader VC unit 5 is used for heat exchange with the ultraviolet laser light source 01;

[0128] The temperature detection unit 2 is configured to detect the light source temperature value of the ultraviolet laser light source 01;

[0129] The control unit 1 is configured to switch the operating state of at least one of the TEC radiator 4 and the fan 3 based on the temperature value of the light source.

[0130] In this embodiment, the temperature detection module 2 refers to a sensor and related circuits arranged on the side of the ultraviolet laser light source 01 away from the light path propagation, which is used to monitor and record the temperature changes of the ultraviolet laser light source 01 in real time. Its main function is to provide the control unit 1 with accurate light source temperature data, that is, the light source temperature value of the ultraviolet laser light source 01, so that the control unit 1 can make appropriate heat dissipation strategy adjustments according to the actual temperature of the ultraviolet laser light source 01, and switch the operating status of each heat dissipation unit in the heat dissipation module 06 that is responsible for realizing the heat dissipation function, so as to achieve different levels of heat dissipation effects and achieve a balance between heat dissipation power consumption and heat dissipation effect (that is, heat dissipation power consumption and printing effect).

[0131] Among the components of the heat dissipation module 06 that are responsible for realizing the heat dissipation function, the heat spreader VC unit 5 is a highly efficient heat conduction element, which is usually composed of a sealed cavity filled with a small amount of working fluid (such as water, alcohol, coolant, etc.). When one side of the heat spreader VC unit 5 is heated, the fluid inside it will evaporate and condense on the other side, thereby realizing the effective transfer of heat from the heat source to the cold end. The fan 3 refers to a heat dissipation unit that realizes the heat dissipation function through the fan 3, and usually includes one or more fans 3 and a heat sink. The airflow generated by the fan 3 takes away the heat from the heat sink, thereby achieving a cooling effect. The TEC radiator 4 refers to a heat dissipation unit that realizes the heat dissipation function based on the thermoelectric effect (also known as the Peltier effect or thermoelectric effect), which can achieve cooling or heating of one end by controlling the direction and magnitude of the current, thereby achieving the purpose of heat dissipation.

[0132] In this embodiment, in order to adapt to the space limitations and power consumption requirements of the optical machine, the TEC radiator 4 can adopt an efficient motor drive method and integrate an intelligent control function, so as to automatically adjust the working intensity according to the actual heat dissipation requirements, thereby saving power resources while ensuring the heat dissipation effect.

[0133] Specifically, the TEC heat sink 4 is a cooling device based on the principle of thermoelectric effect, which can directly convert electrical energy into cold energy. The TEC heat sink 4 can be installed near the heat spreader VC unit 1, and can achieve efficient heat transfer by directly contacting it or connecting it with thermal conductive materials (such as heat dissipation paste, heat dissipation silicone grease, etc.), thereby reducing the temperature of the ultraviolet laser light source 01. In the TEC heat sink 4, heat transfer can be achieved by controlling the direction of the current, thereby achieving a cooling effect. At the same time, the TEC heat sink 4 is small in size and weight, and is suitable for use in optical and mechanical equipment with limited space.

[0134] Therefore, after adopting the TEC radiator 4, the temperature of the ultraviolet laser light source 01 in the 3D printing optical machine system 10 can be effectively controlled, and the power stability of the emitted ultraviolet light is significantly improved, thereby improving the printing accuracy. At the same time, since the TEC radiator 4 has the characteristics of efficient heat dissipation and precise temperature control, it can also extend the service life of the ultraviolet laser light source 01 and reduce the optical machine maintenance cost.

[0135] It should also be noted that, in the present embodiment, the control unit 1 is a central control unit in the heat dissipation module 06 that is responsible for achieving a balance between heat dissipation power consumption and heat dissipation effect. The control unit 1 switches the operating state of at least one of the fan 3 and the TEC radiator 4 based on the light source temperature value of the ultraviolet laser light source 01 uploaded by the temperature detection module 2, thereby achieving different levels of heat dissipation effects, pursuing a balance between heat dissipation power consumption and heat dissipation effect, and reducing the heat dissipation power consumption as much as possible to extend the battery life while ensuring that the heat dissipation effect of the optical machine does not affect the printing effect.

[0136] It is worth mentioning that in this embodiment, the fan 3 and the TEC radiator 4 have multiple operating states, and the heat dissipation effect and heat dissipation power consumption in different operating states are different. Based on the light source temperature value detected by the temperature detection module 2, the control unit 1 selects the operating state combination with the lowest heat dissipation power consumption from the multiple operating state combinations of the fan 3 and the TEC radiator 4 under the premise of meeting the current heat dissipation demand without affecting the optical machine printing effect, and switches the operating state of at least one of the fan 3 and the TEC radiator 4 based on the operating state combination, so as to achieve a balance between heat dissipation power consumption and heat dissipation effect (that is, battery life and printing effect).

[0137] In this embodiment, the heat spreader VC unit 5 is arranged close to the ultraviolet laser light source 01, so as to facilitate heat exchange with the ultraviolet laser light source 01 through the heat spreader VC unit 5, and quickly conduct the heat from the ultraviolet laser light source 01, thereby protecting the ultraviolet laser light source 01 from high temperature damage and avoiding local overheating affecting the printing effect. One end of the heat spreader VC unit 5 is also arranged close to the TEC radiator 4 and / or the fan 3, so as to accelerate the dissipation of heat through the TEC radiator 4 and / or the fan 3. Specifically, in one embodiment, one end of the heat spreader VC unit 5 is arranged close to the TEC radiator 4. In another embodiment, one end of the heat spreader VC unit 5 is arranged close to the fan 3. In yet another embodiment, one end of the heat spreader VC unit 5 is arranged close to both the TEC radiator 4 and the fan 3.

[0138] The embodiment of the present application controls the TEC radiator 4 and the fan 3 to be in different operating states at different light source temperatures, so as to quickly dissipate heat from the ultraviolet laser light source 01 and avoid performance problems caused by excessive heating of the ultraviolet laser light source 01. In addition, through the intelligent heat dissipation control mechanism of this embodiment, excessive power consumption can also be avoided. While controlling the heat dissipation, the operating power consumption of the 3D printing optical machine system 10 can be well reduced, and the endurance of the 3D printing optical machine system 10 can be improved. The ability to dynamically adjust the heat dissipation strategy according to the current light source temperature information is effectively realized, and the optimal balance between the optical machine printing effect and power consumption is achieved, thereby solving the problem that the heat dissipation method in the related technology is difficult to take into account the endurance and printing effect of the 3D printing optical machine system 10.

[0139] In a feasible embodiment, the fan 3 has at least two speed gears, the TEC radiator 4 has at least two temperature control gears, and the control unit 1 is used to:

[0140] Get the light source temperature value;

[0141] In this embodiment, it should be noted that the speed gear refers to different setting values ​​of the rotation speed of the fan 3, and the temperature control gear refers to different temperature setting values ​​of the TEC radiator 4. Generally, a higher gear means a higher speed or a lower temperature setting value, which can provide a better heat dissipation effect, but also consumes more electricity.

[0142] This embodiment collects the light source temperature value of the ultraviolet laser light source 01 and analyzes the current temperature state of the ultraviolet laser light source 01 to determine what speed gear and temperature control gear should be used to control the operation of the fan 3 and the TEC radiator 4. This can effectively dissipate the heat of the optical machine at the expense of the battery life of the optical machine, ensure the printing effect of the optical machine, achieve the effect of taking into account both the battery life of the optical machine and the printing effect, and realize the best balance between performance and power consumption.

[0143] Based on the converged heat dissipation strategy prediction AI model, a target combined heat dissipation strategy matching the light source temperature value is predicted, where the target combined heat dissipation strategy includes a target speed gear and a target temperature control gear;

[0144] It should be noted that the heat dissipation strategy refers to a set of rules or methods for effectively controlling the temperature of the ultraviolet laser light source 01 under specific conditions, generally including the selection of a heat dissipation method, how to adjust the gear position of the fan 3 and / or the TEC radiator 4, and the operating time of the fan 3 and / or the TEC radiator 4 at the corresponding adjustment gear position.

[0145] In this embodiment, the combined heat dissipation strategy refers to a set of rules or methods for effectively controlling the temperature of the ultraviolet laser light source 01 at a specific temperature by using multiple heat dissipation means (including at least heat dissipation by fan 3 and heat dissipation by TEC radiator 4), including the gears of each heat dissipation unit in the combination, such as the speed gear of fan 3 and the temperature control gear of TEC radiator 4. The target combined heat dissipation strategy is a combined heat dissipation strategy for the ultraviolet laser light source 01 at the current temperature, which aims to achieve the best heat dissipation effect with the minimum power consumption by reasonably configuring the gears of fan 3 and TEC radiator 4, so as to achieve the effect of taking into account the printing effect and endurance of the optical machine, thereby achieving the best balance between performance and power consumption, and solving the problem that the heat dissipation method in the related art is difficult to take into account the endurance and printing effect of the device. The target combined heat dissipation strategy includes a target speed gear and a target temperature control gear, wherein the target speed gear is the fan 3 speed gear that is most suitable for the current light source temperature value under the combined heat dissipation method including at least fan 3 and TEC radiator 4, and the target temperature control gear is the TEC radiator 4 temperature control gear that is most suitable for the current light source temperature value under the combined heat dissipation method including at least fan 3 and TEC radiator 4.

[0146] It should be noted that, in this embodiment, the convergent heat dissipation strategy prediction AI model is a model trained by a machine learning algorithm, which can predict the combined heat dissipation strategy that best suits the current situation based on the light source temperature value, that is, the target combined heat dissipation strategy.

[0147] It is worth mentioning that, depending on the samples and labels used during training, the converged cooling strategy prediction AI model can directly output the target combined cooling strategy, or it can output an intermediate parameter information, and then match the corresponding combined cooling strategy as the target combined cooling strategy based on the intermediate parameter information.

[0148] It is understandable that, as the gear of the heat dissipation module 06 (including the speed gear of the fan 3 and / or the temperature control gear of the TEC radiator 4) increases, the degree of improvement in the heat dissipation effect is generally lower than the degree of improvement in power consumption. That is, when the gear is low, the heat dissipation module 06 can dissipate 10% of heat for every 10% of energy consumed, and as the gear increases, the heat dissipation module 06 can dissipate 10% of heat for every 1, 12 or even 15% of energy consumed. Taking fan 3 as an example, assuming that the air volume generated by fan 3 is proportional to the heat dissipated, as the speed gear of fan 3 increases, the air volume generated by fan 3 per unit time increases with the increase of speed, but this increase is not linear. According to the principle of fluid mechanics, air resistance increases with the square of speed, which means that as the speed increases, the increase rate of air volume per unit time will gradually slow down, and the increase rate of heat dissipation per unit time of fan 3 will gradually slow down. At the same time, as the speed gear of fan 3 increases, the energy consumed by fan 3 per unit time increases with the increase of speed, but this increase is also not linear. Generally, energy consumption is proportional to the cube of the rotation speed, which means that as the rotation speed increases, the rate of increase of energy consumption per unit time of the fan 3 will gradually accelerate. Therefore, as the speed level increases, the increase in energy consumption of the fan 3 will gradually exceed the increase in heat dissipation. Correspondingly, the TEC radiator 4 also has a situation where the increase in energy consumption gradually exceeds the increase in heat dissipation as the temperature control level increases.

[0149] In traditional heat dissipation management, as the gear position of the heat dissipation module 06 increases, although the heat dissipation effect is improved, its power consumption (that is, energy consumption per unit time) increases more significantly. In other words, the heat dissipation efficiency of the heat dissipation module 06 decreases as the gear position increases. However, in this embodiment, for the case where the energy consumption of the heat dissipation module 06 is not proportional to the heat dissipation effect, a pre-trained convergent heat dissipation strategy prediction AI model is used to predict the most suitable combined heat dissipation strategy at the current light source temperature, thereby performing low-power combined heat dissipation through different heat dissipation modules 06, while better achieving the heat dissipation effect while minimizing the increase in power consumption as much as possible, and achieving the heat dissipation effect that a single heat dissipation unit in the related technology requires high power consumption to achieve, thereby optimizing power consumption and extending battery life while ensuring the printing effect of the optical machine.

[0150] In this embodiment, the convergent heat dissipation strategy prediction AI model can predict the target combined heat dissipation strategy that best suits the current light source temperature in real time based on the current light source temperature information, thereby adjusting the gears of each heat dissipation unit (the types of heat dissipation units in this embodiment include fans 3 and TEC radiators 4) in real time to adapt to the ever-changing use environment, ensuring that the optical machine can maintain a good heat dissipation effect under any circumstances, and even under high load conditions, by optimizing the combined heat dissipation strategy to avoid excessive increase in power consumption, and achieve a heat dissipation effect similar to or even better than that of a single heat dissipation unit (for example, the optical machine is only provided with a single fan 3, or only a single TEC radiator 4) at a lower total power consumption. In this way, even when higher heat dissipation performance is required, the battery life of the optical machine will not be affected too much, thereby extending the endurance of the optical machine, and enabling the optical machine to find the best synergy between different heat dissipation methods, thereby achieving the best balance between overall performance and power consumption.

[0151] The fan 3 is controlled to operate according to the target speed gear, and the TEC radiator 4 is controlled to operate according to the target temperature control gear.

[0152] In this embodiment, after predicting the target combination heat dissipation strategy that matches the current light source temperature information, the target combination heat dissipation strategy is executed, the fan 3 is controlled to operate at the target speed gear in the target combination heat dissipation strategy, and the TEC radiator 4 is controlled to operate at the target temperature control gear in the target combination heat dissipation strategy. Through the combined heat dissipation of different heat dissipation modules 06, a heat dissipation effect similar to or even better than that of a single heat dissipation module 06 at a high gear is achieved with lower total power consumption. While ensuring the printing effect of the optical machine, energy is saved as much as possible to extend the battery life.

[0153] In this embodiment, the convergent heat dissipation strategy prediction AI model can automatically infer and judge the heating situation of the current terminal based on the current light source temperature information of the optical machine, predict the target combined heat dissipation strategy that matches the current light source temperature information, and determine an optimal speed gear and temperature control gear according to the currently learned data, so as to intelligently select the fan 3 speed and TEC radiator 4 temperature setting value used in the current scene. This embodiment predicts which combined heat dissipation strategy is more suitable for the optical machine under the current light source temperature information through the convergent heat dissipation strategy prediction AI model, so as to more intelligently control the speed gear of the fan 3 and the temperature control gear of the TEC radiator 4, which can not only ensure the heat dissipation of the optical machine, but also reduce unnecessary power consumption waste of the optical machine.

[0154] In a feasible embodiment, the control unit 1 is further used for:

[0155] Input the light source temperature value into the converged heat dissipation strategy prediction AI model to obtain the intermediate parameter information output by the heat dissipation strategy prediction AI model;

[0156] It should be noted that the intermediate parameter information in this embodiment refers to the information used to further convert the target combined cooling strategy in the output of the cooling strategy prediction AI model. Depending on different training methods and model designs, the intermediate parameter information can have different forms and meanings.

[0157] For example, in the heat dissipation strategy prediction AI model training method that uses the light source temperature value as a sample and the score value as a label, the intermediate parameter information may refer to the score value, while in the heat dissipation strategy prediction AI model training method that uses the light source temperature value as a sample and the heat generated by the optical machine per unit time as a label, the intermediate parameter information may refer to the heat generated by the optical machine per unit time.

[0158] Based on the preset parameter mapping relationship, query and obtain the speed gear and temperature control gear mapped by the intermediate parameter information;

[0159] It should be noted that, in this embodiment, the parameter mapping relationship is a mapping relationship between the intermediate parameter information and the speed gear and the temperature control gear, and each intermediate parameter information is mapped to a speed gear and a temperature control gear.

[0160] During the training stage of the heat dissipation strategy prediction AI model, this embodiment constructs a mapping relationship between each intermediate parameter information and the speed gear and the temperature control gear in advance as a parameter mapping relationship. After the heat dissipation strategy prediction AI model outputs the intermediate parameter information, the parameter mapping relationship is directly queried to obtain the mapped speed gear and temperature control gear.

[0161] According to the speed gear and temperature control gear mapped by the intermediate parameter information, a target combined heat dissipation strategy matching the light source temperature value is determined, wherein the target combined heat dissipation strategy refers to a combined heat dissipation strategy with the lowest heat dissipation power consumption when the operating performance of the ultraviolet laser light source 01 reaches a preset performance standard.

[0162] After querying and obtaining the speed gear and temperature control gear mapped by the intermediate parameter information, this embodiment directly uses the speed gear as the target speed gear, and uses the temperature control gear as the target temperature control gear, so that the target speed gear and the target temperature control gear can be directly used as the target combined cooling strategy matching the current light source temperature information. The time for the fan 3 to run at the target speed gear and the time for the TEC radiator 4 to run at the target temperature control gear can also be further set to obtain a more detailed and comprehensive combined cooling strategy as the target combined cooling strategy matching the current light source temperature information.

[0163] In a feasible embodiment, when the light source temperature value is greater than the first preset value and less than or equal to the second preset value, the control unit 1 controls the fan 3 to run at the target speed gear;

[0164] The second preset value is greater than the first preset value.

[0165] It should be noted that, in this embodiment, the first preset value and the second preset value are two different temperature thresholds, which are used to define the start-up conditions of different heat dissipation strategies (such as heat dissipation by fan 3 and heat dissipation by TEC radiator 4), and the heat spreader VC unit 5 always remains in operation.

[0166] In this embodiment, the first heat dissipation strategy is to control the fan 3 to run at the target speed gear when the heat spreader VC unit 5 keeps running but is still not sufficient to dissipate the generated heat in time, that is, when the temperature value of the light source is greater than the first preset value and less than or equal to the second preset value, so that the fan 3 actively participates in the heat dissipation, and conducts the accumulated heat with the lowest power consumption to avoid heat accumulation in the optical machine, ensuring that the performance of the ultraviolet laser light source 01 will not be affected by overheating, thereby achieving the best balance between heat dissipation power consumption and heat dissipation effect.

[0167] It should be noted that in this embodiment, the fan 3 has at least one speed gear, and different speed gears correspond to different heat dissipation power consumption and heat dissipation effects. In this embodiment, when the optical machine is cooled by the heat spreader VC unit 5 and the fan 3, one of the optional speed gears of the fan 3 can be selected as the target speed gear according to the light source temperature value detected by the temperature detection module 2, so as to meet the heat dissipation requirements and ensure that the performance of the optical machine is not affected, so as to minimize the heat dissipation power consumption and extend the escort time of the optical machine as much as possible.

[0168] In a feasible embodiment, when the light source temperature value is greater than the second preset value and less than or equal to the third preset value, the control unit 1 controls the TEC radiator 4 to operate at the target temperature control gear;

[0169] The third preset value is greater than the second preset value.

[0170] It should be noted that, in this embodiment, the third preset value is a temperature threshold value different from the first preset value and the second preset value, and is used to define the start-up conditions of different heat dissipation strategies together with the first preset value and the second preset value.

[0171] In this embodiment, the second heat dissipation strategy is to activate the vapor chamber VC unit 5 and the TEC heat sink 4 at the same time.

[0172] In this embodiment, when the first heat dissipation strategy is not sufficient to dissipate the heat generated by the optical machine in time, that is, when the temperature value of the light source is greater than the second preset value and less than or equal to the third preset value, the second heat dissipation strategy is used to simultaneously activate the heat spreader VC unit 5 and the TEC radiator 4, so that the TEC radiator 4 actively participates in the heat dissipation, and conducts the heat accumulated in the optical machine with the lowest power consumption, avoiding heat accumulation in the optical machine, ensuring that the performance of the ultraviolet laser light source 01 will not be affected by overheating, thereby achieving the best balance between heat dissipation power consumption and heat dissipation effect.

[0173] It should be noted that in this embodiment, the TEC radiator 4 has at least one temperature control gear, and different temperature control gears correspond to different heat dissipation power consumption and heat dissipation effects. When the optical machine is cooled by the second heat dissipation strategy, one of the optional temperature control gears of the TEC radiator 4 can be selected as the target temperature control gear according to the light source temperature value detected by the temperature detection module 2, so as to meet the heat dissipation requirements and ensure that the printing effect of the optical machine is not affected, so as to minimize the heat dissipation power consumption and extend the escort time of the optical machine as much as possible.

[0174] In a feasible embodiment, when the light source temperature value is greater than the third preset value, the control unit 1 controls the fan 3 to operate at a target speed gear, and controls the TEC radiator 4 to operate at a target temperature control gear.

[0175] In this embodiment, when the temperature data detected by the temperature detection module 2 exceeds the third preset value, that is, the temperature value of the light source is greater than the third preset value, it indicates that the temperature value of the light source has exceeded the upper temperature limit and is in a state of severe overheating. At this time, it is necessary to implement the third heat dissipation strategy used as an emergency measure to dissipate heat and cool the optical machine at the fastest speed regardless of power consumption, and control the temperature of the optical machine as soon as possible, that is, the control unit 1 controls the operation of the heat spreader VC unit 5, and controls the TEC radiator 4 to operate at the target temperature control gear, and controls the fan 3 to operate at the target speed gear, thereby activating all the heat dissipation units in the heat dissipation module 06, and uses the highest gear among the optional temperature control gears of the TEC radiator 4 as the target temperature control gear, and uses the highest speed gear among the optional speed gears of the fan 3 as the target speed gear, and dissipates heat and cools the optical machine regardless of power consumption to ensure that the temperature of the optical machine can be controlled as soon as possible.

[0176] This example monitors the light source temperature in real time and responds promptly, flexibly adjusts the heat dissipation strategy according to actual temperature changes, and gradually increases the heat dissipation intensity according to different temperature thresholds, thereby ensuring efficient heat dissipation and minimizing unnecessary energy waste, effectively preventing hardware damage or performance degradation caused by overheating, thereby improving the optical machine printing effect, reducing frequency reduction or stuttering caused by overheating, ensuring that the optical machine can maintain the optimal operating temperature in various application scenarios, providing users with a smoother application experience, and achieving the optimal balance between heat dissipation power consumption and heat dissipation effect, significantly improving the stability and reliability of the optical machine.

[0177] The embodiment of the present application further proposes a 3D printing device, which includes the 3D printing optical machine system of the above embodiment. The 3D printing device can specifically be a DLP 3D printer.

[0178] The above are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A 3D printing optical machine system, characterized in that: The 3D printing optical machine system includes an ultraviolet laser light source, a beam expansion module, a light homogenization module, a relay module and a digital micromirror device which are sequentially arranged along the optical path; The beam expansion module is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and expand the ultraviolet light beam to obtain an expanded light beam; The homogenizing module is used to receive the expanded light beam and homogenize the expanded light beam to obtain a homogenized light beam; The relay module is used to receive the homogenized light beam and adjust the beam angle and size of the homogenized light beam to obtain a shaped light beam, wherein the focal length of the relay module is determined by the light spot size of the exit surface of the homogenized light module and the aperture angle of the digital micromirror device; The digital micromirror device is used to receive the shaped light beam and control the reflection direction of the shaped light beam to form a target image to be projected on the printing area.

2. The 3D printing optical machine system according to claim 1, characterized in that: The 3D printing optical machine system also includes a heat dissipation module, which includes a control unit, a temperature detection unit, a fan, a TEC radiator and a heat sink VC unit; The vapor chamber VC unit is arranged close to the ultraviolet laser light source, and a side of the vapor chamber VC unit away from the ultraviolet laser light source is close to the TEC radiator and / or the fan, and the vapor chamber VC unit is used for heat exchange with the ultraviolet laser light source; The temperature detection unit is configured to detect the light source temperature value of the ultraviolet laser light source; The control unit is configured to switch the operating state of at least one of the TEC radiator and the fan based on the temperature value of the light source.

3. The 3D printing optical machine system according to claim 2, characterized in that: The fan has at least two speed gears, the TEC radiator has at least two temperature control gears, and the control unit is used for: Obtaining the temperature value of the light source; Based on the converged heat dissipation strategy prediction AI model, a target combined heat dissipation strategy matching the light source temperature value is predicted, wherein the target combined heat dissipation strategy includes a target speed gear and a target temperature control gear; The fan is controlled to operate according to the target speed gear, and the TEC radiator is controlled to operate according to the target temperature control gear.

4. The 3D printing optical machine system according to claim 3, characterized in that: The control unit is further used for: Inputting the light source temperature value into a converged heat dissipation strategy prediction AI model to obtain intermediate parameter information output by the heat dissipation strategy prediction AI model; Based on the preset parameter mapping relationship, query and obtain the speed gear and temperature control gear mapped by the intermediate parameter information; According to the speed gear and temperature control gear mapped by the intermediate parameter information, a target combined heat dissipation strategy that matches the light source temperature value is determined, wherein the target combined heat dissipation strategy refers to a combined heat dissipation strategy with the lowest heat dissipation power consumption when the operating performance of the ultraviolet laser light source reaches a preset performance standard.

5. The 3D printing optical machine system according to claim 4, characterized in that: When the light source temperature value is greater than a first preset value and less than or equal to a second preset value, the control unit controls the fan to run at a target speed gear; Wherein, the second preset value is greater than the first preset value.

6. The 3D printing optical machine system according to claim 5, characterized in that: When the light source temperature value is greater than the second preset value and less than or equal to the third preset value, the control unit controls the TEC radiator to operate at the target temperature control gear; Wherein, the third preset value is greater than the second preset value.

7. The 3D printing optical machine system according to claim 6, characterized in that: When the light source temperature value is greater than a third preset value, the control unit controls the fan to operate at a target speed gear, and controls the TEC radiator to operate at a target temperature control gear.

8. The 3D printing optical machine system according to claim 1, characterized in that: The beam expansion module comprises a negative lens and a positive lens sequentially arranged along the optical path, and the distance between the negative lens and the positive lens is determined by the focal length of the negative lens and the focal length of the positive lens; The negative lens is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and diverge the ultraviolet light beam to obtain an intermediate expanded light beam; The positive lens is used to converge the intermediate expanded light beam to obtain an expanded light beam, wherein the diffusion multiple of the expanded light beam is determined by the focal length of the negative lens and the focal length of the positive lens.

9. The 3D printing optical machine system according to claim 1, characterized in that: The beam expansion module is a diffuser, and the diffuser is a flat-top diffuser or a Gaussian diffuser; The diffuser is used to receive the ultraviolet light beam emitted by the ultraviolet laser light source and expand the ultraviolet light beam to obtain an expanded light beam, wherein the diffusion multiple of the expanded light beam is determined by the diffusion angle of the diffuser, the spacing between the diffuser and the uniform light module, and the incident light spot size of the diffuser.

10. A 3D printing device, characterized in that: The 3D printing device comprises a 3D printing optical-mechanical system as claimed in any one of claims 1 to 9.

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