Light path coaxial adjusting mechanism and 3D printing equipment

Abstract

The utility model belongs to the technical field of ceramic slurry 3D printing, and particularly relates to an optical path coaxial adjusting mechanism and 3D printing equipment. The first adjusting part is connected to the substrate; the lower end of the laser is connected with the first adjusting component; the laser is provided with an emission port; the first adjusting part comprises a plurality of first adjusting parts; the first adjusting part comprises a first screwing block and a second screwing block, the first screwing block comprises a first body and a first adjusting groove arranged corresponding to the second screwing block, and through the arrangement of the optical path coaxial adjusting mechanism, the problem of laser power attenuation caused by deviation and non-coaxiality of an optical path is solved; the incident light path from the laser beam generated by the laser to the galvanometer is coaxial with the axis of the light inlet of the galvanometer, the deviation phenomenon is avoided, the laser efficiency is effectively improved, and the consistency of the diameters of light spots on a scanning surface is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ceramic slurry 3D printing, and specifically relates to an optical path coaxial adjustment mechanism and 3D printing equipment. Background Art

[0002] The molding method of ceramic slurry photocuring 3D printing is to cure the ceramic slurry mixed with photosensitive resin layer by layer with ultraviolet light, and then obtain ceramic parts through post-processing such as degreasing and sintering. After the ultraviolet light is generated by the laser, it is propagated and controlled by the optical path system, and scanned on the molding surface according to the molding path set for each layer of the ceramic part. The spot quality of the ultraviolet light on the molding surface, the spot scanning positioning accuracy, and the laser power all affect the molding quality and dimensional accuracy of the ceramic parts.

[0003] The optical path system is mainly composed of laser, beam expander, galvanometer, field lens, etc. The laser generates ultraviolet light required for photocuring. After the beam diameter is enlarged by the beam expander, it is incident on the galvanometer. After being reflected by the X-lens and Y-lens in the galvanometer, it is focused on the molding surface through the field lens. The equipment control system controls the scanning path of the light spot focused by the field lens on the molding surface by controlling the reflection angle between the X-lens and Y-lens of the galvanometer and the light beam.

[0004] However, due to processing errors and assembly errors, after the optical path system is assembled, the actual optical path of the light beam incident on the galvanometer will be offset from the axis of the light entrance of the galvanometer, resulting in deviation and misalignment, which will lead to laser power attenuation and poor consistency of the spot diameter on the scanning surface. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides an optical path coaxial adjustment mechanism and a 3D printing device. Through the setting of the optical path coaxial adjustment mechanism, the problem of optical path deviation and non-coaxiality causing laser power attenuation is solved, and the incident optical path of the laser beam generated by the laser to the galvanometer is coaxial with the axis of the light entrance of the galvanometer, avoiding deviation, effectively improving laser efficiency, and ensuring the consistency of the spot diameter on the scanning surface.

[0006] The technical effect to be achieved by the utility model is achieved through the following technical solutions:

[0007] An optical path coaxial adjustment mechanism comprises a substrate; a first adjustment component connected to the substrate; and a laser, wherein the lower end of the laser is connected to the first adjustment component;

[0008] The first adjustment component includes a plurality of first adjustment parts; the first adjustment part includes a first tightening block and a second tightening block, the first tightening block includes a first body and a first adjustment slot corresponding to the second tightening block, and the first adjustment slot is arranged at the upper end of the first body;

[0009] The lower end of the second tightening block is embedded and connected to the first adjusting groove, the lower end of the first tightening block is connected to the substrate, and the upper end of the second tightening block is connected to the laser.

[0010] The first adjustment component is used to adjust the support height of the laser, thereby adjusting the beam height of the laser, which is adaptable to different height requirements and has high flexibility.

[0011] In the utility model, the adjustment process of the first adjustment component is: after the first body is fixedly connected to the substrate, the second tightening block is adjusted in the first adjustment slot by rotating the second tightening block, and after adjusting to the desired position, the laser and the second tightening block are connected by using existing screws to complete the adjustment action. Through this setting, the laser can flexibly adjust the position according to the specific situation, effectively ensuring that the incident light path of the laser beam generated by the laser to the galvanometer is coaxial with the axis of the light entrance of the galvanometer, eliminating the deviation phenomenon, effectively improving the laser efficiency, and ensuring the consistency of the spot diameter on the scanning surface.

[0012] Furthermore, the number of the first adjustment parts is 3-6. Through this configuration, the number of the first adjustment parts can be flexibly set according to the size of the laser, thereby ensuring the placement stability of the laser, and being adaptable to lasers of different sizes and types, with strong adaptability.

[0013] Furthermore, the optical path coaxial adjustment mechanism further comprises a beam expander, a fixing seat, a galvanometer and a field lens which are sequentially connected; the laser is provided with an emission port;

[0014] The galvanometer comprises a second body and a transmitting mirror group arranged in the second body, and the second body is provided with a light inlet and a light outlet;

[0015] One end of the beam expander is connected to the emission port; the other end of the beam expander passes through the fixing seat and is connected to the light entrance port; the field lens is connected to the light exit port, one end of the fixing seat is fixedly connected to the galvanometer, and the other end of the fixing seat is fixedly connected to the substrate.

[0016] Through the above structure setting, the optical path is as follows: the laser generates ultraviolet light, after the beam diameter is enlarged by the beam expander, it is incident on the galvanometer through the light inlet, then reflected by the X lens and Y lens in the galvanometer and emitted from the light outlet, and finally focused on the molding surface through the field lens. The equipment control system controls the reflection angle between the X lens and Y lens of the galvanometer and the light beam, and then controls the scanning path of the light spot focused by the field lens on the molding surface. The overall structural design is simple and compact, the structural stability is high, and the optical path is streamlined and non-redundant.

[0017] Furthermore, the fixing seat includes a first plate, a second plate and a third plate, the first plate is vertically connected to one end of the second plate, and the third plate is vertically connected to the other end of the second plate; the first plate is connected to the galvanometer, and the third plate is connected to the substrate. The beam expander is arranged through the first plate, which effectively limits the beam expander and ensures the stability of the beam expander during operation. And through the structural setting of the fixing seat, the galvanometer is connected to the substrate, which can effectively ensure the stability of the galvanometer and the quality of the light spot.

[0018] Furthermore, the optical path coaxial adjustment mechanism also includes a positioning plate, which is connected to one end of the second plate close to the third plate, and the positioning plate is arranged in the same plane as the second plate. Through this arrangement, before the optical path system is assembled, the positioning plate can be used as a rough reference for laser assembly. The positioning plate is fixed on the fixing seat. When the laser is assembled, the emission port of the laser is close to the end of the positioning plate away from the fixing seat, and the laser can be initially aligned to a position parallel to the galvanometer, which can avoid large-scale adjustment of the first adjustment component, speed up the assembly speed, and achieve fast and high-precision assembly.

[0019] Furthermore, the optical path coaxial adjustment mechanism also includes a second adjustment component and a base, the upper end of the second adjustment component is fixedly connected to the lower end of the substrate, and the lower end of the second adjustment component is fixedly connected to the base.

[0020] Further, the second adjustment component includes a plurality of second adjustment parts; the second adjustment part includes a third tightening block and a fourth tightening block, the third tightening block includes a third body and a second adjustment slot corresponding to the fourth tightening block, and the second adjustment slot is arranged at the upper end of the third body;

[0021] The lower end of the fourth tightening block is embedded and connected to the second adjusting groove, the lower end of the third tightening block is connected to the base, and the upper end of the fourth tightening block is connected to the base plate.

[0022] Furthermore, the number of the second adjustment parts is 3-6.

[0023] Through the above-mentioned second adjustment component structural design, the adjustment process of the second adjustment component is: by rotating the fourth tightening block to adjust the position of the fourth tightening block in the second adjustment slot, after adjusting the base to the required height, the base plate and the fourth tightening block are connected by using existing screws to complete the adjustment action. Through this setting, the parallelism between the laser scanning surface and the machine molding surface can be adjusted to ensure the molding quality of the ceramic parts and improve the success rate of part molding.

[0024] Furthermore, the base is a granite base. With this arrangement, granite can effectively avoid the base itself being affected by temperature or deforming, thereby ensuring the light spot quality of the optical path system, due to its low temperature expansion coefficient and strong rigidity.

[0025] The 3D printing device includes the above-mentioned optical path coaxial adjustment mechanism, which effectively ensures the 3D printing molding effect.

[0026] In summary, the utility model has at least the following benefits: through the setting of the optical path coaxial adjustment mechanism, the problem of optical path deviation and misalignment causing laser power attenuation is solved, and the incident optical path of the laser beam generated by the laser to the galvanometer is coaxial with the axis of the light entrance of the galvanometer, thus avoiding deviation, effectively improving laser efficiency, and ensuring the consistency of the spot diameter on the scanning surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0028] Figure 2 It is a cross-sectional view of the first adjusting portion in Embodiment 1 of the present utility model;

[0029] Figure 3 It is a cross-sectional view of the first tightening block in Example 1 of the utility model;

[0030] Figure 4 This is an exploded view of Example 1 of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the fixing base in Embodiment 1 of the present utility model;

[0032] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0033] Figure 7 This is an exploded view of Example 2 of the utility model;

[0034] Figure 8 It is a cross-sectional view of the second adjusting portion in Embodiment 2 of the present utility model;

[0035] Fig. 9 It is a cross-sectional view of the third tightening block in Example 2 of the utility model.

[0036] Markings in the figure: 1. substrate; 2. first adjusting component, 21. first adjusting part, 211. first tightening block, 2111. first body, 2112. first adjusting groove, 212. second tightening block; 3. laser; 4. beam expander; 5. fixing seat, 51. first plate, 52. second plate, 53. third plate; 6. galvanometer; 7. field mirror; 8. positioning plate; 9. second adjusting component, 91. second adjusting part, 911. third tightening block, 9111. third body, 9112. second adjusting groove, 912. fourth tightening block; 11. base. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] Please see attached Figure 1-3 The utility model provides an optical path coaxial adjustment mechanism, comprising a substrate 1; a first adjustment component 2 connected to the substrate 1; and a laser 3, the lower end of the laser 3 being connected to the first adjustment component 2;

[0041] The first adjustment component 2 includes a plurality of first adjustment parts 21; the first adjustment part 21 includes a first tightening block 211 and a second tightening block 212, the first tightening block 211 includes a first body 2111 and a first adjustment groove 2112 corresponding to the second tightening block 212, and the first adjustment groove 2112 is arranged at the upper end of the first body 2111;

[0042] The lower end of the second tightening block 212 is embedded in the first adjustment groove 2112 , the lower end of the first tightening block 211 is connected to the substrate 1 , and the upper end of the second tightening block 212 is connected to the laser 3 .

[0043] The first adjustment component 2 is used to adjust the support height of the laser 3, thereby adjusting the beam height of the laser 3, which is adaptable to different height requirements and has high flexibility.

[0044] In the present invention, the adjustment process of the first adjustment component 2 is as follows: after the first body 2111 is fixedly connected to the substrate 1, the second tightening block 212 is adjusted in the position of the first adjustment slot 2112 by rotating the second tightening block 212. After adjusting to the desired position, the laser 3 is connected to the second tightening block 212 by using the existing screws to complete the adjustment action. Through this setting, the laser 3 can flexibly adjust the position according to the specific situation, effectively ensuring that the incident light path of the laser beam generated by the laser 3 to the galvanometer 6 is coaxial with the axis of the light entrance of the galvanometer 6, eliminating the deviation phenomenon, effectively improving the laser efficiency, and ensuring the consistency of the spot diameter on the scanning surface.

[0045] In one embodiment, three first adjusting parts 21 are provided.

[0046] Please see attached Figure 4 The optical path coaxial adjustment mechanism also includes a beam expander 4, a fixing seat 5, a galvanometer 6 and a field lens 7 which are sequentially connected; the laser 3 is provided with an emission port;

[0047] The galvanometer 6 includes a second body and a transmitting mirror group arranged in the second body, and the second body is provided with a light inlet and a light outlet;

[0048] One end of the beam expander 4 is connected to the emission port; the other end of the beam expander 4 passes through the fixing seat 5 and is connected to the light entrance port; the field lens 7 is connected to the light exit port, one end of the fixing seat 5 is fixedly connected to the galvanometer 6, and the other end of the fixing seat 5 is fixedly connected to the substrate 1.

[0049] Through the above structure setting, the optical path is that the laser 3 generates ultraviolet light, after the beam diameter is enlarged by the beam expander 4, it is incident on the galvanometer 6 through the light inlet, then reflected by the X lens and Y lens in the galvanometer 6 and emitted from the light outlet, and finally focused on the molding surface through the field lens 7. The equipment control system controls the reflection angle between the X lens and Y lens of the galvanometer 6 and the light beam, and then controls the scanning path of the light spot focused by the field lens 7 on the molding surface. The overall structural design is simple and compact, the structural stability is high, and the optical path is streamlined and non-redundant.

[0050] Please see attached Figure 4 The optical path coaxial adjustment mechanism also includes a positioning plate 8, which is connected to one end of the second plate 52 close to the third plate 53, and the positioning plate 8 is arranged in the same plane as the second plate 52. Through this arrangement, before the optical path system is assembled, the positioning plate 8 can be used as a rough reference for the assembly of the laser 3. The positioning plate 8 is fixed on the fixing seat 5. When the laser 3 is assembled, one end of the emission port of the laser 3 is close to the end of the positioning plate 8 away from the fixing seat 5. The laser 3 can be initially aligned in a position parallel to the galvanometer 6, which can avoid the first adjustment component 2 from making large movements, speed up the assembly speed, and achieve fast and high-precision assembly.

[0051] Please see attached Figure 5The fixing seat 5 includes a first plate 51, a second plate 52 and a third plate 53. The first plate 51 is vertically connected to one end of the second plate 52, and the third plate 53 is vertically connected to the other end of the second plate 52; the first plate 51 is connected to the galvanometer 6, and the third plate 53 is connected to the substrate 1. The beam expander 4 is arranged through the first plate 51, which effectively limits the beam expander 4 and ensures the stability of the operation process of the beam expander 4. And through the structural setting of the fixing seat 5, the galvanometer 6 is connected to the substrate 1, which can effectively ensure the stability of the galvanometer 6 and the quality of the light spot.

[0052] Example 2

[0053] The difference between this embodiment and embodiment 1 is: Figure 6-9 The optical path coaxial adjustment mechanism also includes a second adjustment component 9 and a base 11. The upper end of the second adjustment component 9 is fixedly connected to the lower end of the substrate 1, and the lower end of the second adjustment component 9 is fixedly connected to the base 11.

[0054] In one embodiment, the second adjustment component 9 includes a plurality of second adjustment parts 91; the second adjustment part 91 includes a third tightening block 911 and a fourth tightening block 912; the third tightening block 911 includes a third body 9111 and a second adjustment groove 9112 corresponding to the fourth tightening block 912; the second adjustment groove 9112 is disposed at the upper end of the third body 9111;

[0055] The lower end of the fourth tightening block 912 is embedded and connected to the second adjustment groove 9112 , the lower end of the third tightening block 911 is connected to the base 11 , and the upper end of the fourth tightening block 912 is connected to the base plate 1 .

[0056] In one embodiment, three second adjustment parts 91 are provided.

[0057] Through the structural design of the second adjustment component 9, the adjustment process of the second adjustment component 9 is as follows: the fourth tightening block 912 is adjusted to the position of the fourth tightening block 912 in the second adjustment slot 9112 by rotating the fourth tightening block 912, and after the base 11 is adjusted to the desired height, the substrate 1 and the fourth tightening block 912 are connected by using existing screws to complete the adjustment action. Through this setting, the parallelism between the laser scanning surface and the machine molding surface can be adjusted to ensure the molding quality of the ceramic parts and improve the success rate of part molding.

[0058] In one embodiment, the base 11 is a granite base 11. With this configuration, granite has a lower temperature expansion coefficient and stronger rigidity, which can effectively prevent the base 11 from being affected by temperature or deforming itself, thereby ensuring the light spot quality of the optical path system.

[0059] Example 3

[0060] The 3D printing device includes the above-mentioned optical path coaxial adjustment mechanism, which effectively ensures the 3D printing molding effect.

[0061] In summary, the utility model has at least the following benefits: through the setting of the optical path coaxial adjustment mechanism, the problem of optical path deviation and misalignment causing laser power attenuation is solved, and the incident optical path of the laser beam generated by the laser to the galvanometer is coaxial with the axis of the light entrance of the galvanometer, thus avoiding deviation, effectively improving laser efficiency, and ensuring the consistency of the spot diameter on the scanning surface.

[0062] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0065] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0066] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. An optical path coaxial adjustment mechanism, characterized in that: include: substrate; A first adjustment component connected to the substrate; as well as A laser, the lower end of which is connected to the first adjustment component; The first adjustment component includes a plurality of first adjustment parts; the first adjustment part includes a first tightening block and a second tightening block, the first tightening block includes a first body and a first adjustment slot corresponding to the second tightening block, and the first adjustment slot is arranged at the upper end of the first body; The lower end of the second tightening block is embedded and connected to the first adjusting groove, the lower end of the first tightening block is connected to the substrate, and the upper end of the second tightening block is connected to the laser.

2. The optical path coaxial adjustment mechanism according to claim 1, characterized in that: The number of the first adjusting parts is 3-6.

3. The optical path coaxial adjustment mechanism according to claim 1, characterized in that: The optical path coaxial adjustment mechanism also includes a beam expander, a fixing seat, a galvanometer and a field lens which are sequentially connected; The laser is provided with an emission port; The galvanometer comprises a second body and a transmitting mirror group arranged in the second body, and the second body is provided with a light inlet and a light outlet; One end of the beam expander is connected to the emission port; the other end of the beam expander passes through the fixing seat and is connected to the light entrance port; the field lens is connected to the light exit port, one end of the fixing seat is fixedly connected to the galvanometer, and the other end of the fixing seat is fixedly connected to the substrate.

4. The optical path coaxial adjustment mechanism according to claim 3, characterized in that: The fixing seat includes a first plate, a second plate and a third plate, the first plate is vertically connected to one end of the second plate, and the third plate is vertically connected to the other end of the second plate; the first plate is connected to the galvanometer, and the third plate is connected to the substrate.

5. The optical path coaxial adjustment mechanism according to claim 4, characterized in that: The optical path coaxial adjustment mechanism further includes a positioning plate, which is connected to an end of the second plate close to the third plate, and the positioning plate and the second plate are arranged in the same plane.

6. The optical path coaxial adjustment mechanism according to claim 3, characterized in that: The optical path coaxial adjustment mechanism also includes a second adjustment component and a base, the upper end of the second adjustment component is fixedly connected to the lower end of the substrate, and the lower end of the second adjustment component is fixedly connected to the base.

7. The optical path coaxial adjustment mechanism according to claim 6, characterized in that: The second adjustment component includes a plurality of second adjustment parts; the second adjustment part includes a third tightening block and a fourth tightening block, the third tightening block includes a third body and a second adjustment slot corresponding to the fourth tightening block, and the second adjustment slot is arranged at the upper end of the third body; The lower end of the fourth tightening block is embedded and connected to the second adjusting groove, the lower end of the third tightening block is connected to the base, and the upper end of the fourth tightening block is connected to the base plate.

8. The optical path coaxial adjustment mechanism according to claim 7, characterized in that: The number of the second adjustment parts is 3-6.

9. The optical path coaxial adjustment mechanism according to claim 6, characterized in that: The base is a granite base.

10. 3D printing equipment, characterized in that It comprises the optical path coaxial adjustment mechanism as described in any one of claims 1-9.

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