Multi-precision switching 3D printing device

Abstract

The utility model relates to the technical field of 3D printing, in particular to a multi-precision switching 3D printing device which comprises a light source mechanism used for emitting a projection light beam; the forming printing table is used for bearing a printing sample; the light path adjusting assembly is arranged on an emergent light path of the light source mechanism and is used for projecting the projection light beam emitted by the light source mechanism to the objective lens mechanism; the objective lens mechanism is arranged between the light path adjusting assembly and the forming printing table and comprises a precision switching mechanism and at least two objective lenses arranged on the precision switching mechanism, and the precision switching mechanism can drive any objective lens to move to the projection light path of the projection light beam so that the projection light beam can be projected to the forming surface of the forming printing table through the objective lens; switching of different objective lenses is achieved, the multiple objective lenses can share the same light path system, the situation that a complex light path system needs to be correspondingly arranged due to the fact that the multiple objective lenses are arranged is avoided, the complexity of the light path system is reduced, the projection effect of projection light is guaranteed, and therefore the printing precision is improved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a 3D printing device capable of switching between multiple precisions. Background Art

[0002] Surface projection micro-stereoscopic photocuring printing technology is a highly efficient 3D printing technology, and its working principle is based on digital light processing technology and photocuring materials. In the DLP printing process, a high-brightness UV light source or white light source is used to illuminate the light beam reflected by a digital mirror device (DMD) or a liquid crystal panel (LCD) to project the designed 3D model onto a photosensitive polymer or resin layer. These photosensitive materials will cure quickly under the action of UV light to form a layer of solid material. Compared with traditional SLA technology, it has the advantages of fast printing speed and high precision because it can cure the entire layer at once for each layer, rather than curing it point by point and line by line. This technology is widely used in the fields of prototyping, custom manufacturing, and educational research. However, common micro-stereoscopic 3D printing equipment generally only has one printing accuracy, which cannot meet the printing needs of different accuracy.

[0003] Therefore, it is necessary to provide a 3D printing device capable of switching between multiple precisions to solve at least one of the above-mentioned problems in the prior art. Utility Model Content

[0004] The present application provides a 3D printing device capable of multi-precision switching, comprising: a light source mechanism for emitting a projection beam; a molding printing table for carrying a printed sample; an optical path adjustment component, arranged on the output optical path of the light source mechanism, for projecting the projection beam emitted by the light source mechanism onto an objective lens mechanism; an objective lens mechanism, arranged between the optical path adjustment component and the molding printing table, comprising a precision switching mechanism and at least two objective lenses arranged on the precision switching mechanism, wherein the precision switching mechanism can drive any of the objective lenses to move to the projection optical path of the projection beam, so that the projection beam can be projected onto the molding surface of the molding printing table after passing through the objective lens.

[0005] Furthermore, the precision switching mechanism includes a driving assembly, a sliding assembly, an objective lens mounting plate and a base; a plurality of objective lens mounting positions are provided on the objective lens mounting plate, and the objective lens mounting plate can be detachably mounted on the sliding assembly; the driving assembly is fixed on the base, and the driving assembly can drive the sliding assembly to move, thereby cooperatively driving the objective lens mounting plate to move.

[0006] Furthermore, a projection hole is provided on the base, and the projection hole is provided on the projection light path of the projection light beam. The projection light beam can pass through the projection hole and then be projected onto the molding surface of the molding printing table through the objective lens.

[0007] Furthermore, the sliding assembly includes a sliding member and a guide rail assembly; one end of the guide rail assembly is fixedly connected to the base, and the other end of the guide rail assembly is fixedly connected to the sliding member; the driving assembly can drive the sliding member to move along the guide rail assembly.

[0008] Furthermore, the guide rail assembly includes a first guide rail, a second guide rail and a rolling body; one of the first guide rail and the second guide rail is fixedly connected to the base, and the other is fixedly connected to the sliding member, the rolling body is arranged between the first guide rail and the second guide rail, and the first guide rail and the second guide rail are slidably matched.

[0009] Furthermore, the sliding assembly is provided with a mounting groove, and the objective lens mounting plate is detachably mounted in the mounting groove.

[0010] Furthermore, the precision switching mechanism further includes a displacement measuring device, and the displacement measuring device is used to measure the movement of the objective lens mounting plate.

[0011] Furthermore, the displacement measuring device includes a first detecting member and a second detecting member that are matched with each other; one of the first detecting member and the second detecting member is arranged on the sliding member, and the other is arranged on the base.

[0012] Furthermore, the first detection component is a reading head, and the second detection component is a grating ruler; the grating ruler is fixedly connected to the sliding component, and the reading head is fixedly connected to the base.

[0013] Furthermore, the drive assembly includes a drive motor and a drive shaft in transmission connection;

[0014] The driving motor is fixedly connected to the base; the transmission shaft is fixedly connected to the sliding member, and the driving motor can drive the transmission shaft to drive the sliding member to move, thereby driving the objective lens mounting plate to move relative to the base.

[0015] Furthermore, the driving assembly further includes a support member; one end of the support member is fixedly connected to the transmission shaft, and the other end of the support member is fixedly connected to the sliding member.

[0016] Furthermore, the 3D printing device capable of switching between multiple precisions also includes a material pool, and the molding printing table is placed in the material pool.

[0017] Furthermore, the 3D printing device capable of switching between multiple precisions further includes an image acquisition device, which is used to acquire image information of the printed sample on the molding printing table.

[0018] The present application provides a 3D printing device capable of switching between multiple precisions, which has at least the following technical effects:

[0019] The 3D printing device capable of multi-precision switching in the present application includes: a light source mechanism for emitting a projection beam; a molding printing table for carrying a printed sample; an optical path adjustment component, arranged on the output optical path of the light source mechanism, for projecting the projection beam emitted by the light source mechanism onto an objective lens mechanism; an objective lens mechanism, arranged between the optical path adjustment component and the molding printing table, including a precision switching mechanism and at least two objective lenses arranged on the precision switching mechanism, the precision switching mechanism being capable of driving any of the objective lenses to move to the projection optical path of the projection beam, so that the projection beam can be projected onto the molding surface of the molding printing table after passing through the objective lens; and further, by arranging the precision switching mechanism in the 3D printing device, the precision switching mechanism is capable of driving any objective lens mounted thereon to move to a target position, thereby realizing switching of different objective lenses, enabling multiple objective lenses to share the same optical path system, avoiding the need to set up a complex optical path system corresponding to the setting of multiple objective lenses, reducing the complexity of the optical path system, and improving the efficiency of objective lens switching, ensuring the projection effect of projection light, thereby improving printing precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 : A schematic diagram of the overall structure of a 3D printing device capable of switching between multiple precisions provided in an embodiment of the present application;

[0022] Figure 2 : A schematic structural diagram of the precision switching mechanism provided in an embodiment of the present application;

[0023] Figure 3 : A partial exploded view of the precision switching mechanism provided in an embodiment of the present application;

[0024] Figure 4 : An exploded view of a drive assembly provided in an embodiment of the present application;

[0025] Among them, the reference numerals in the figure correspond to:

[0026] 1-light source mechanism, 2-optical path adjustment assembly, 3-objective lens mechanism, 5-molding printing table, 6-image acquisition device, 7-material pool, 31-precision switching mechanism, 32-objective lens, 35-displacement measuring device, 311-driving assembly, 312-sliding assembly, 313-objective lens mounting plate, 314-base, 321-first guide rail, 322-second guide rail, 351-first detection member, 352-second detection member, 3111-driving motor, 3112-transmission shaft, 3113-support member, 3114-motor mounting plate, 3121-sliding member, 3131-objective lens mounting position, 3141-projection hole, 3231-mounting groove, 3232-avoidance opening. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0029] The following describes the embodiments with reference to the accompanying drawings, which do not limit the application content described in the claims.

[0030] Please refer to Figure 1-4 As shown, an embodiment of the present application provides a 3D printing device with multi-precision switching, including a light source mechanism 1 for emitting a projection light beam; a molding printing table 5 for carrying a printed sample; an optical path adjustment component 2, arranged on the output light path of the light source mechanism 1, for projecting the projection light beam emitted by the light source mechanism 1 onto the objective lens mechanism 3; the objective lens mechanism 3, arranged between the optical path adjustment component 2 and the molding printing table 5, including a precision switching mechanism 31 and at least two objective lenses 32 arranged on the precision switching mechanism 31, the precision switching mechanism 31 can drive any objective lens 32 to move to the projection light path of the projection light beam, so that the projection light beam can be projected onto the molding surface of the molding printing table 5 after passing through the objective lens 32.

[0031] In the implementation of this application, by setting a precision switching mechanism 31 in the 3D printing device, the precision switching mechanism 31 can drive any objective lens 32 installed thereon to move to the target position, thereby realizing switching between different objective lenses 32, so that multiple objective lenses 32 can share the same optical path system, avoiding the need to set up a corresponding complex optical path system due to the setting of multiple objective lenses 32, reducing the complexity of the optical path system, and improving the switching efficiency of the objective lens 32, ensuring the projection effect of the projected light, thereby improving printing accuracy.

[0032] Specifically, the light source mechanism 1 includes a light source and a digital mask system, which is used to project a projection light beam carrying image information onto the optical path adjustment component 2 along the optical axis of the light source mechanism 1 .

[0033] It should be noted that the digital mask system is controlled by a computer, generating a digital mask pattern, illuminating it through an optical projection system, and then projecting it onto the corresponding imaging position on the wafer or mask surface, directly exposing and writing the designed pattern. This method is efficient, flexible, and easy to adjust.

[0034] Specifically, the optical path adjustment component 2 may include a beam splitter, and the light source mechanism 1 is arranged next to the beam splitter. The projection light beam emitted by the light splitter is arranged at an angle to the beam splitter, so that the projection light beam can be reflected toward the side where the forming printing table 5 is located after passing through the beam splitter.

[0035] Specifically, the projection light beam emitted by the light source mechanism 1 is arranged at an angle of 45° to the beam splitter.

[0036] In some embodiments, the precision switching mechanism 31 includes a driving assembly 311, a sliding assembly 312, an objective lens mounting plate 313 and a base 314; the objective lens mounting plate 313 is connected to the sliding assembly 312, specifically, the objective lens mounting plate 313 and the sliding assembly 312 are detachably fixedly connected; the driving assembly 311 is fixed on the base 314, and the driving assembly 311 can drive the sliding assembly 312 to move, and then cooperate with the objective lens mounting plate 313 to move to the target position.

[0037] Specifically, a plurality of objective lens mounting positions 3131 are provided on the objective lens mounting plate 313 . The objective lens mounting positions 3131 may be threaded mounting holes, and the threaded mounting holes are arranged at equal intervals along the length direction of the objective lens mounting plate 313 .

[0038] In the embodiment of the present application, the precision switching mechanism 31 includes at least two objective lenses 32 with different magnifications. Thus, the precision switching mechanism 31 switches the objective lenses 32 with different magnifications, thereby achieving switching of different precisions.

[0039] In the embodiment of the present application, three threaded mounting holes are equidistantly arranged on the objective lens mounting plate 313, and an objective lens 32 of different magnifications is mounted on each threaded mounting hole. Then, driven by the driving component 311, the objective lens mounting plate 313 can be moved relative to the base 314, and any objective lens 32 on the objective lens mounting plate 313 can be moved to the target position, so that the projection light beam reflected by the optical path adjustment component 2 can be projected onto the molding printing table 5 through the objective lens 32, thereby realizing the replacement of different objective lenses, so that the device can meet the use requirements of different precision.

[0040] In some embodiments, the threaded mounting holes corresponding to the objective lenses 32 of different magnifications have different apertures. In other embodiments, the threaded mounting holes corresponding to the objective lenses 32 of different magnifications may have the same aperture.

[0041] Furthermore, the adaptability of the device can be further improved by replacing different objective lens mounting plates 313 and fixing them to the sliding assembly 312 , and the device is easy to disassemble and operate.

[0042] In some embodiments, a projection hole 3141 is provided on the base 314 . The projection hole 3141 is provided on the reflection light path of the projection light beam. The projection light beam can pass through the projection hole 3141 and then be projected onto the molding surface of the molding printing table 5 through the objective lens 32 .

[0043] In the embodiment of the present application, the driving assembly 311 can match different objective lenses 32 on the objective lens mounting plate 313 with the projection hole 3141, so that the projection light beam passes through the projection hole 3141 and is projected onto the molding printing table 5 through the optical path channel of the objective lens 32.

[0044] In some embodiments, the sliding assembly 312 includes a sliding member 3121 and a guide rail assembly; one end of the guide rail assembly is fixedly connected to the base 314, and the other end of the guide rail assembly is fixedly connected to the sliding member 3121; the driving assembly 311 can drive the sliding member 3121 to move along the guide rail assembly.

[0045] Specifically, the guide rail assembly includes a guide rail and a slider that are slidably connected. The guide rail is fixedly connected to the base 314, and the slider is fixedly connected to the sliding member 3121. The driving assembly 311 can drive the slider to slide along the guide rail, and then cooperate to drive the sliding member 3121 to move along the guide rail.

[0046] Specifically, the sliding assembly 312 may include two sets of guide rail assemblies, and the two sets of guide rail assemblies are arranged on the base 314 at intervals, thereby improving the movement stability of the sliding member 3121.

[0047] In some embodiments, the guide rail assembly includes a first guide rail 321, a second guide rail 322 and a rolling body; one of the first guide rail 321 and the second guide rail 322 is fixedly connected to the base 314, and the other is fixedly connected to the sliding member 3121, and the rolling body is arranged between the first guide rail 321 and the second guide rail 322, and the first guide rail 321 and the second guide rail 322 are slidably matched.

[0048] Specifically, the first guide rail 321 is fixedly connected to the base 314 , and the second guide rail 322 is fixedly connected to the sliding member 3121 . The driving assembly 311 can drive the second guide rail 322 to slide along the first guide rail 321 , thereby cooperatively driving the sliding member 3121 to move along the first guide rail 321 .

[0049] Specifically, a first guide rail mounting position is provided on the base 314, and a second guide rail mounting position corresponding to the first guide rail mounting position is provided on the sliding member 3121. The first guide rail 321 is fixedly installed on the first guide rail mounting position, and the second guide rail 322 is fixedly installed on the second guide rail mounting position.

[0050] In some embodiments, a mounting groove 3231 is provided on the sliding assembly 312 , and the objective lens mounting plate 313 is detachably mounted in the mounting groove 3231 .

[0051] Specifically, the sliding assembly 312 includes a sliding member 3121 and a guide rail assembly. The guide rail assembly can drive the sliding member 3121 to slide relative to the base 314 , and the mounting groove 3231 is provided on the sliding member 3121 .

[0052] Specifically, the shape of the mounting groove 3231 matches the objective lens mounting plate 313 and the groove depth of the mounting groove 3231 matches the thickness of the objective lens mounting plate 313. The objective lens mounting plate 313 can be detachably installed in the mounting groove 3231, and the installed objective lens mounting plate 313 can be accommodated in the mounting groove 3231.

[0053] Specifically, the objective lens mounting plate 313 can be threadedly connected in the mounting groove 3231 by means of bolts.

[0054] Specifically, an avoidance opening 3232 is provided on the bottom of the installation groove 3231 , so that the projection light beam on the reflected light path passes through the projection hole 3141 and then through the avoidance opening 3232 to be projected onto the molding printing table 5 .

[0055] In other embodiments, the objective lens mounting plate 313 can be snapped into the mounting groove 3231 .

[0056] In the embodiment of the present application, a mounting groove 3231 is provided on the sliding member 3121, and the objective lens mounting plate 313 can be detachably mounted in the mounting groove 3231. Then, by replacing different objective lens mounting plates 313, different objective lenses 32 can be replaced, and the disassembly operation is simplified, the disassembly and assembly efficiency is improved, and the overall adaptability of the device is improved.

[0057] In some embodiments, a receiving groove for receiving the sliding member 3121 is further provided on the base 314 . The sliding member 3121 is installed in the receiving groove via a guide rail assembly, thereby reducing the overall volume of the precision switching mechanism 31 .

[0058] In some embodiments, the drive assembly 311 includes a drive motor 3111 and a transmission shaft 3112 in a transmission connection; the drive motor 3111 is fixedly connected to the base 314; the transmission shaft 3112 is fixedly connected to the sliding member 3121, and the drive motor 3111 can drive the transmission shaft 3112 to drive the sliding member 3121 to move, so as to drive the objective lens mounting plate 313 to move relative to the base 314.

[0059] Specifically, the driving assembly 311 further includes a motor mounting plate 3114 . The motor mounting plate 3114 is fixed on a side wall of the base 314 , and the driving motor 3111 is fixed on the motor mounting plate 3114 .

[0060] Specifically, the transmission shaft 3112 is a magnetic shaft, and the driving motor 3111 can drive the magnetic shaft to rotate forward and reverse, thereby driving the sliding member 3121 to move back and forth along the guide rail.

[0061] In some embodiments, the driving assembly 311 further includes a support member 3113 ; one end of the support member 3113 is fixedly connected to the transmission shaft 3112 , and the other end of the support member 3113 is fixedly connected to the sliding member 3121 .

[0062] Specifically, the transmission shaft 3112 is fixedly connected to the sliding member 3121 through the support member 3113. The support member 3113 is provided with a fixing hole that matches the transmission shaft 3112. The transmission shaft 3112 and the fixing hole can be fixedly connected by threads.

[0063] Specifically, two support members 3113 may be provided, and both ends of the transmission shaft 3112 are respectively threadedly connected to the fixing holes corresponding to the two support members 3113 , and the support members 3113 may be fixedly connected to the sliding member 3121 by bolts.

[0064] In some embodiments, the precision switching mechanism 31 further includes a displacement measuring device 35 , which is used to measure the movement of the objective lens mounting plate 313 .

[0065] Specifically, the measurable range of the displacement measuring device 35 at least partially covers the moving stroke of the objective lens mounting plate 313 , or at least partially covers the moving stroke of the sliding member 3121 , thereby ensuring the measurement accuracy of the displacement measuring device 35 .

[0066] In an embodiment of the present application, the displacement measuring device 35 can measure the movement of the sliding member 3121, and then measure the movement of the objective lens mounting plate 313. The control device can control the driving component 311 to drive the sliding member 3121 to move according to the movement of the objective lens mounting plate 313, and then achieve precise control of the movement of the objective lens mounting plate 313, thereby achieving precise positioning of the objective lens 32.

[0067] In some embodiments, the displacement measuring device 35 includes a first detecting member 351 and a second detecting member 352 that are matched with each other; one of the first detecting member 351 and the second detecting member 352 is disposed on the sliding member 3121 , and the other is disposed on the base 314 .

[0068] Specifically, the first detecting member 351 is fixedly connected to the sliding member 3121 , and the second detecting member 352 is fixedly connected to the base 314 .

[0069] Specifically, the first detecting component 351 is a reading head, and the second detecting component 352 is a grating ruler; the grating ruler is fixedly connected to the sliding component 3121 , and the reading head is fixedly connected to the base 314 .

[0070] Optionally, the displacement measuring device 35 may include two reading heads that cooperate with the grating ruler, thereby improving the measurement accuracy of the displacement measuring device 35.

[0071] In an embodiment of the present application, the driving motor 3111 drives the sliding member 3121 to move through the transmission shaft 3112, and cooperates with the movement of the grating ruler. The reading head can accurately read the movement amount of the sliding member 3121 according to the movement of the moving grating ruler, and then the control device accurately positions the sliding member 3121 according to the movement amount of the sliding member 3121 read by the reading head, so that according to the specific accuracy requirements, accurate switching of different objective lenses 32 can be achieved.

[0072] In some embodiments, the 3D printing device capable of switching between multiple precisions further includes a material pool 7 , and the molding printing table 5 is placed in the material pool 7 .

[0073] Specifically, a release film is provided at the opening of the material pool 7; the plane where the release film is located is coplanar with the projection plane of the projection light beam.

[0074] Specifically, the plane where the release film is located is arranged parallel to the molding surface of the molding printing table 5 .

[0075] Specifically, the material pool 7 contains the material liquid to be printed, which may be a resin, preferably a light-curing resin. The light-curing resin has the characteristic of being quickly cured under ultraviolet light, and thus the printing process can be completed in a relatively short time.

[0076] Specifically, the light source mechanism 1 emits a projection light beam that can solidify the to-be-printed liquid below the release film to form a solidified layer.

[0077] Furthermore, the multi-precision switchable 3D printing device also includes a lifting and adjusting device. The forming print table 5 is placed on the supporting surface of the lifting and adjusting device. The lifting and adjusting device can drive the forming print table 5 to move upward relative to the release film by a preset displacement, thereby allowing the printing material liquid to cover the gap between the forming print table 5 and the release film, thereby solidifying the printing material liquid through exposure to obtain a new solidified layer. The lifting and adjusting device then drives the forming print table 5 to move downward relative to the release film by a preset demolding displacement. This reciprocating cycle can achieve layer-by-layer printing of the sample. The preset displacement can be the thickness of the solidified layer set by the system.

[0078] In an embodiment of the present application, by setting the plane where the release film is located parallel to the molding surface of the molding print table 5, and the plane where the release film is located is coplanar with the projection plane of the projection light beam, it can be ensured that the projection light beam can clearly and accurately project the projection image onto the molding surface of the molding print table 5, thereby improving the 3D printing effect of the device.

[0079] In some embodiments, the 3D printing device capable of multi-precision switching further includes an image acquisition device 6 , which is used to acquire image information of the printed sample on the molding printing table 5 .

[0080] Specifically, the image acquisition device 6 and the molding printing table 5 are respectively arranged on both sides of the beam splitter, and are coaxially arranged with the reflected light path of the projection light beam.

[0081] Specifically, the image acquisition device 6 can be a camera, through which the imaging effect on the molding printing table 5 and the molding process of 3D printing are observed.

[0082] Example

[0083] Please refer to Figure 1-4As shown, an embodiment of the present application provides a 3D printing device with multi-precision switching, including a light source mechanism 1 for emitting a projection light beam; a molding printing table 5 for carrying a printed sample; an optical path adjustment component 2, arranged on the output light path of the light source mechanism 1, for projecting the projection light beam emitted by the light source mechanism 1 onto the objective lens mechanism 3; the objective lens mechanism 3, arranged between the optical path adjustment component 2 and the molding printing table 5, including a precision switching mechanism 31 and at least two objective lenses 32 arranged on the precision switching mechanism 31, the precision switching mechanism 31 can drive any objective lens 32 to move to the projection light path of the projection light beam, so that the projection light beam can be projected onto the molding surface of the molding printing table 5 after passing through the objective lens 32.

[0084] The molding printing table 5 is placed in the material pool 7, and a release film is provided at the opening of the material pool 7. The material pool 7 contains light-curing resin, and the molding printing table 5 is placed on the bearing surface of the lifting and adjusting device. The lifting and adjusting device can drive the molding printing table 5 to move upward relative to the release film for a preset displacement, so that the material to be printed covers the gap between the molding printing table 5 and the release film, thereby achieving the solidification of the material to be printed through exposure processing to obtain a new layer of solidified layer, and then the molding printing table 5 is driven by the lifting and adjusting device to move downward relative to the release film for a preset demolding displacement. Such a reciprocating cycle can realize layer-by-layer printing of the structure to be docked.

[0085] The optical path adjustment component 2 is a beam splitter, which is arranged on the output light path of the light source mechanism 1. The light source mechanism 1 is arranged on the left side of the beam splitter and the incident angle of the projection light beam emitted by the light source mechanism 1 on the beam splitter is 45°; the camera and the forming printing table 5 are arranged on the upper and lower sides of the beam splitter, and are coaxially arranged with the reflected light path of the projection light beam; the precision switching device 3 is arranged between the beam splitter and the forming printing table 5.

[0086] The precision switching device 3 includes a driving assembly 311 , two sets of guide rail assemblies, a sliding member 3121 , an objective lens mounting plate 313 and a base 314 ; the guide rail assembly includes a first guide rail 321 and a second guide rail 322 that are slidably engaged.

[0087] The base 314 is provided with a receiving groove for accommodating the sliding member 3121, and the bottom of the receiving groove is provided with two first guide rail mounting positions, and the first guide rail 321 is fixedly connected to the first guide rail mounting position by bolts. The sliding member 3121 is provided with two second guide rail mounting positions corresponding to the first guide rail mounting positions, and the second guide rail 322 is fixedly connected to the second guide rail mounting position by bolts.

[0088] The driving assembly 311 includes a driving motor, a magnetic shaft, a support member 3113 and a motor mounting plate 3114; the motor mounting plate 3114 is fixed on the base 314, and the two ends of the magnetic shaft are fixedly supported by the support member 3113, and the support member 3113 is fixedly connected to the sliding member 3121; the driving motor is connected to the magnetic shaft in a transmission manner, and the driving motor 3111 can drive the magnetic shaft to rotate forward and reverse, thereby driving the sliding member 3121 to move back and forth along the first guide rail 321.

[0089] The sliding member 3121 is provided with a mounting slot 3231, into which the objective lens mounting plate 313 is removably mounted via bolts. The objective lens mounting plate 313 is also provided with three threaded mounting holes of varying sizes, spaced evenly apart, for accommodating three objective lenses 32 of varying magnifications. The base 314 is also provided with a projection hole 3141, which is positioned within the reflected optical path of the projection beam. The drive assembly 311 is capable of aligning different objective lenses 32 on the objective lens mounting plate 313 with the projection hole 3141, thereby allowing the projection beam to pass through the projection hole 3141 and then, through the optical path of the objective lens 32, be projected onto the forming print table 5.

[0090] A reading head is fixedly mounted on the base 314, a grating scale is fixedly mounted on the sliding member 3121, the driving motor 3111 drives the sliding member 3121 to move through the transmission shaft 3112, and cooperatively drives the grating scale to move. The reading head can accurately read the movement amount of the sliding member 3121 according to the movement of the moving grating scale, and then the control device accurately positions the sliding member 3121 according to the movement amount of the sliding member 3121 read by the reading head, so that accurate switching of different objective lenses 32 can be achieved according to specific accuracy requirements.

[0091] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0092] It should be noted that all the features recorded in this application (including technical features recorded in different embodiments) can be combined arbitrarily under reasonable circumstances, and the new technical solutions formed by the combination are all within the scope of protection of this application.

[0093] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A 3D printing device capable of switching between multiple precisions, characterized in that: include: A light source mechanism (1) for emitting a projection light beam; A molding printing table (5) for carrying printed samples; An optical path adjustment component (2) is arranged on the output optical path of the light source mechanism (1) and is located above the objective lens mechanism (3), and is used for projecting the projection light beam emitted by the light source mechanism (1) onto the objective lens mechanism (3); An objective lens mechanism (3) is arranged between the optical path adjustment component (2) and the molding printing table (5), and comprises a precision switching mechanism (31) and at least two objective lenses (32) arranged on the precision switching mechanism (31); the precision switching mechanism (31) can drive any one of the objective lenses (32) to move to the projection optical path of the projection light beam, so that the projection light beam can be projected onto the molding surface of the molding printing table (5) after passing through the objective lens (32); The precision switching mechanism (31) comprises a driving assembly (311), a sliding assembly (312), an objective lens mounting plate (313) and a base (314); the objective lens mounting plate (313) is connected to the sliding assembly (312); the sliding assembly (312) comprises a sliding member (3121); The driving assembly (311) comprises a driving motor (3111) and a transmission shaft (3112) in a transmission connection; the driving motor (3111) is fixedly connected to the base (314); the transmission shaft (3112) is fixedly connected to the sliding member (3121); the driving motor (3111) can drive the transmission shaft (3112) to drive the sliding member (3121) to move, thereby driving the objective lens mounting plate (313) to move relative to the base (314); and the transmission shaft (3112) is a magnetic axis.

2. The 3D printing device capable of switching between multiple precisions according to claim 1, characterized in that: The objective lens mounting plate (313) is provided with a plurality of objective lens mounting positions (3131); The driving assembly (311) is fixed on the base (314), and the driving assembly (311) can drive the sliding assembly (312) to move, thereby cooperatively driving the objective lens mounting plate (313) to move.

3. The 3D printing device capable of switching between multiple precisions according to claim 2, characterized in that: A projection hole (3141) is provided on the base (314), and the projection hole (3141) is provided on the projection light path of the projection light beam. The projection light beam can pass through the projection hole (3141) and then be projected onto the molding surface of the molding printing table (5) through the objective lens (32).

4. The 3D printing device capable of switching between multiple precisions according to claim 2, characterized in that: The sliding assembly (312) includes a guide rail assembly; One end of the guide rail assembly is fixedly connected to the base (314), and the other end of the guide rail assembly is fixedly connected to the sliding member (3121); The driving assembly (311) is capable of driving the sliding member (3121) to move along the guide rail assembly.

5. The 3D printing device capable of switching between multiple precisions according to claim 4, characterized in that: The guide rail assembly comprises a first guide rail (321), a second guide rail (322) and a rolling body; One of the first guide rail (321) and the second guide rail (322) is fixedly connected to the base (314), and the other is fixedly connected to the sliding member (3121). The rolling body is arranged between the first guide rail (321) and the second guide rail (322), and the first guide rail (321) and the second guide rail (322) are slidably matched.

6. The 3D printing device capable of switching between multiple precisions according to claim 2, characterized in that: The sliding assembly (312) is provided with a mounting groove (3231), and the objective lens mounting plate (313) is detachably mounted in the mounting groove (3231).

7. The 3D printing device capable of switching between multiple precisions according to claim 2, characterized in that: The precision switching mechanism (31) further includes a displacement measuring device (35), and the displacement measuring device (35) is used to measure the movement amount of the objective lens mounting plate (313).

8. The 3D printing device capable of switching between multiple precisions according to claim 7, characterized in that: The displacement measuring device (35) comprises a first detection member (351) and a second detection member (352) that are matched with each other; One of the first detecting member (351) and the second detecting member (352) is arranged on the sliding member (3121), and the other is arranged on the base (314).

9. The 3D printing device capable of switching between multiple precisions according to claim 8, characterized in that: The first detection component (351) is a reading head, and the second detection component (352) is a grating ruler; The grating ruler is fixedly connected to the sliding member (3121), and the reading head is fixedly connected to the base (314).

10. The 3D printing device capable of switching between multiple precisions according to claim 9, characterized in that: The driving assembly (311) further includes a support member (3113); one end of the support member (3113) is fixedly connected to the transmission shaft (3112), and the other end of the support member (3113) is fixedly connected to the sliding member (3121).

11. The 3D printing device capable of switching between multiple precisions according to any one of claims 1 to 10, characterized in that: It also includes a material pool (7), and the molding printing table (5) is placed in the material pool (7).

12. The 3D printing device capable of switching between multiple precisions according to any one of claims 1 to 10, characterized in that: It also includes an image acquisition device (6), which is used to acquire image information of the printed sample on the molding printing table (5).

Images