Photocuring rapid forming machine

Abstract

The utility model provides a photocuring rapid forming machine. The photocuring rapid forming machine comprises a box body, an executing mechanism and a slicking mechanism, the slicking mechanism comprises an electromagnet, a spring, a hinge and a scraper; one end of the spring is fixedly connected with the upper hinge body of the hinge, the other end of the spring is fixedly connected with the lower hinge body of the hinge, and the lower hinge body is pulled to the position perpendicular to the upper hinge body through the spring; the scraper is fixedly connected with the lower hinge; the executing mechanism is arranged on the box body, the longitudinal moving end of the executing mechanism is fixedly connected with an upper hinge of the hinge, and the executing mechanism is used for driving a scraper to move longitudinally; the electromagnet is fixedly arranged on the longitudinal moving end and located below the upper hinge. According to the photocuring rapid forming machine provided by the invention, the control precision of the scanning lens and the final curing effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of photocuring rapid prototyping, and in particular to a photocuring rapid prototyping machine. Background Art

[0002] In recent years, with the rapid development of 3D printing technology, rapid prototyping technology has also developed rapidly in China, and the demand for light-curing rapid prototyping machines has also increased.

[0003] At present, photocuring rapid prototyping machines usually use laser as the curing light source, but using laser as the curing light source will greatly increase the operating cost. With the gradual popularization and popularization of 3D printing technology, more and more photocuring rapid prototyping machines use ultraviolet light for curing operations.

[0004] In the prior art, UV curing rapid prototyping machines usually use an ellipsoidal reflective surface to converge UV light and transmit the UV light to a scanning lens, which is then driven by a workbench to perform curing operations. However, in the prior art solutions, the scraper can only perform reciprocating scraping operations, and there is a situation where the already scraped liquid surface is repeatedly scraped, which affects the final curing effect. Utility Model Content

[0005] In view of the above problems, the present application provides a light-curing rapid prototyping machine, which can improve the control accuracy of the scanning lens and the final curing effect.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] In a first aspect, the present application provides a light-curing rapid prototyping machine, comprising: a box, an actuator and a scraping mechanism;

[0008] The scraping mechanism comprises: an electromagnet, a spring, a hinge and a scraper;

[0009] One end of the spring is fixedly connected to the upper hinge of the hinge, and the other end is fixedly connected to the lower hinge of the hinge, and the lower hinge is pulled to a position perpendicular to the upper hinge by the spring; the scraper is fixedly connected to the lower hinge;

[0010] The actuator is arranged on the box body, and the longitudinal moving end is fixedly connected to the upper hinge of the hinge, and is used to drive the scraper to move longitudinally;

[0011] The electromagnet is fixedly arranged on the longitudinal moving end and is located below the upper hinge.

[0012] In a possible implementation, the actuator includes: two symmetrically arranged first stepper motors, two symmetrically arranged angular contact ball bearings, two symmetrically arranged ball screws, two symmetrically arranged screw nuts, two symmetrically arranged longitudinal guide rails, and two symmetrically arranged bearing end covers and transverse beams;

[0013] One end of the ball screw is connected to the angular contact ball bearing, and the other end is connected to the bearing end cover;

[0014] The first stepper motor is arranged on the box body, and the output end is connected to the end of the ball screw close to the angular contact ball bearing through a fixed parallel coupling;

[0015] The screw nut is sleeved on the ball screw; the longitudinal guide rail is arranged on the box body and is located directly below the ball screw;

[0016] One side of the transverse beam connection portion is fixedly connected to the lead screw nut, and the bottom surface of the transverse beam connection portion is slidably connected to the longitudinal guide rail.

[0017] In a possible implementation, the upper hinge of the hinge is fixedly connected to the upper part of the side wall of the transverse beam;

[0018] The electromagnet is fixedly arranged on the lower part of the side wall of the transverse beam and is located below the upper hinge.

[0019] In a possible implementation, the actuator further includes: a toothed belt, a transverse slider, a transverse guide block, a transverse guide rail, and two symmetrically arranged gears;

[0020] The transverse guide rail is fixedly arranged on the transverse crossbeam;

[0021] The gear is fixedly arranged on the connecting portion of the transverse beam, and the toothed belt is meshedly connected with the two gears;

[0022] The transverse slider is engaged with the toothed belt; the transverse guide rail block is fixedly connected to the transverse slider and is slidably connected to the transverse guide rail.

[0023] In a possible implementation, the photo-curing rapid prototyping machine further includes: a focusing mechanism for controlling the focusing lens to perform lifting and lowering movement; the focusing mechanism is fixedly connected to the transverse slider.

[0024] In a possible implementation, the focusing mechanism includes: a worm shaft, a lens holder, a worm gear, a cam, and a lens;

[0025] The mirror support is fixedly connected to the transverse slider;

[0026] One side of the worm wheel is rotatably connected to the inner wall of the mirror holder, and the other side is fixedly connected to the cam concentrically;

[0027] The worm shaft passes through the mirror holder and is connected to the worm wheel through tooth matching;

[0028] A roller is arranged above the cam, and a roller connecting rod is provided on the roller and can move along with the roller, and the lens is connected with the roller connecting rod.

[0029] In a possible implementation, one end of the worm shaft extending out of the mirror holder has a hand wheel.

[0030] In a possible implementation manner, the lens is connected to the roller connecting rod via a lens connecting rod.

[0031] In a possible implementation, the gear on one side is connected to an output end of the second stepper motor.

[0032] In a possible implementation, the number of the electromagnet, the spring, and the hinge is two, and they are symmetrically arranged at two ends of the transverse beam.

[0033] The light-curing rapid prototyping machine provided in the present application can improve the control accuracy of the scanning lens, solve the problem of the scraper repeatedly scraping the page, improve the final curing effect, and realize the focus adjustment of the focusing lens to ensure scanning accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0035] Figure 1 A schematic diagram of the structure of a light-curing rapid prototyping machine provided in an embodiment of the present application;

[0036] Figure 2 A is a partial enlarged view of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0037] Figure 3 A partial enlarged view B of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of a top view of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the side view structure of a light-curing rapid prototyping machine provided in an embodiment of the present application;

[0040] Figure 6A schematic diagram of the main structure of a light-curing rapid prototyping machine provided in an embodiment of the present application;

[0041] Figure 7 A schematic diagram of the structure of a scraper mechanism of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0042] Figure 8 A partial enlarged view C of a scraper mechanism of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0043] Fig. 9 A schematic diagram of the structure of a transverse beam of a light-curing rapid prototyping machine provided in an embodiment of the present application;

[0044] Fig.10 A schematic diagram of the structure of a focusing system of a photo-curing rapid prototyping machine provided in an embodiment of the present application;

[0045] Fig.11 A schematic diagram of the structure of a light-curing rapid prototyping machine provided in an embodiment of the present application;

[0046] Fig.12 A schematic structural diagram of a focusing system for a photo-curing rapid prototyping machine provided in an embodiment of the present application.

[0047] Figure numerals: 1-first stepper motor; 2-fixed parallel coupling; 3-jackscrew; 4-screw support seat; 5-angular contact ball bearing; 6-ball screw; 7-screw nut; 8-transverse beam; 9-M3 screw; 10-bearing end cover; 11-toothed belt; 12-transverse slider; 13-transverse guide block; 14-M3 screw; 15-electromagnet; 16-gear; 17-longitudinal guide; 18- Box body; 19-M6 screw; 20-M6 screw; 21-support; 22-gear shaft; 23-angular contact ball bearing; 24-handwheel; 25-worm shaft; 26-mirror support; 27-worm gear; 28-mirror connecting rod; 29-roller connecting rod; 30-roller; 31-key; 32-cam; 33-setting screw; 34-lens; 35-spring; 36-hinge; 37-scraper; 38-lateral guide rail. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.

[0050] Example 1

[0051] Figure 1-10 A photo-curing rapid prototyping machine provided in the embodiment of the present application includes: a box 18, an actuator and a scraping mechanism;

[0052] The scraping mechanism comprises: an electromagnet 15, a spring 35, a hinge 36 and a scraper 37;

[0053] One end of the spring 35 is fixedly connected to the upper hinge of the hinge 36, and the other end is fixedly connected to the lower hinge of the hinge 36, and the lower hinge is pulled to a position perpendicular to the upper hinge by the spring 35; the scraper 37 is fixedly connected to the lower hinge;

[0054] The actuator is disposed on the box body 18, and the longitudinal moving end is fixedly connected to the upper hinge of the hinge 36, and is used to drive the scraper 37 to move longitudinally;

[0055] The electromagnet 15 is fixedly arranged on the longitudinal moving end and is located below the upper hinge.

[0056] In a possible implementation manner, the actuator includes: two symmetrically arranged first stepper motors 1, two symmetrically arranged angular contact ball bearings 5, two symmetrically arranged ball screws 6, two symmetrically arranged screw nuts 7, two symmetrically arranged longitudinal guide rails 17, two symmetrically arranged bearing end covers 10 and a transverse beam 8;

[0057] One end of the ball screw 6 is connected to the angular contact ball bearing 5, and the other end is connected to the bearing end cover 10;

[0058] The first stepper motor 1 is arranged on the box body 18, and the output end is connected to the end of the ball screw 6 close to the angular contact ball bearing 5 through a fixed parallel coupling 2;

[0059] The screw nut 7 is sleeved on the ball screw 6; the longitudinal guide rail 17 is arranged on the box body 18 and is located directly below the ball screw 6;

[0060] One side of the connecting portion of the transverse beam 8 is fixedly connected to the lead screw nut 7 , and the bottom surface of the connecting portion of the transverse beam 8 is slidably connected to the longitudinal guide rail 17 .

[0061] The two first stepper motors 1 are turned on synchronously. After the first stepper motor 1 is turned on, the ball screw 6 rotates, and the transverse beam 8 is driven to move longitudinally through the screw nut 7.

[0062] In a possible implementation, the upper hinge of the hinge 36 is fixedly connected to the upper part of the side wall of the transverse beam 8;

[0063] The electromagnet 15 is fixedly arranged on the lower part of the side wall of the transverse beam 8, below the upper hinge.

[0064] When the electromagnet 15 is turned on, the lower hinge is adsorbed onto the transverse beam 8, so that the scraper 37 is in working state.

[0065] In a possible implementation, the actuator further includes: a toothed belt 11, a transverse slider 12, a transverse guide block 13, a transverse guide 38 and two symmetrically arranged gears 16;

[0066] The transverse guide rail 38 is fixedly arranged on the transverse beam 8;

[0067] The gear 16 is fixedly arranged on the connecting portion of the transverse beam 8, and the toothed belt 11 is meshedly connected with the two gears 16;

[0068] The transverse slider 12 is engaged with the toothed belt 11 ; the transverse guide rail block 13 is fixedly connected to the transverse slider 12 and is slidably connected to the transverse guide rail 38 .

[0069] The rotation of the gear 16 drives the toothed belt 11 to drive, thereby driving the transverse slider 12 to move transversely along the transverse guide rail 38 .

[0070] In a possible implementation manner, the photo-curing rapid prototyping machine further includes: a focusing mechanism for controlling the focusing lens to perform lifting and lowering movement; and the focusing mechanism is fixedly connected to the transverse slider 12 .

[0071] The focusing mechanism is driven by the transverse slider 12 to move transversely, and is driven by the transverse beam 8 to move longitudinally.

[0072] In a possible implementation, the focusing mechanism includes: a worm shaft 25, a lens holder 26, a worm gear 27, a cam 32, and a lens 34;

[0073] The mirror support 26 is fixedly connected to the transverse slider 12;

[0074] One side of the worm gear 27 is rotatably connected to the inner wall of the mirror holder 26, and the other side is fixedly connected to the cam 32 concentrically;

[0075] The worm shaft 25 passes through the mirror holder 26 and is connected to the worm wheel 27 through tooth matching;

[0076] A roller 30 is provided above the cam 32 . The roller 30 has a roller connecting rod 29 that can move with the roller 30 . The lens 34 is connected to the roller connecting rod 29 .

[0077] Here, by rotating the worm shaft 25, the belt lens 34 moves up and down.

[0078] In a possible implementation manner, one end of the worm shaft 25 extending out of the mirror holder 26 has a hand wheel 24 to facilitate the rotation operation of the worm shaft 25 .

[0079] In a possible implementation manner, the lens 34 is connected to the roller link 29 via a lens link 28 .

[0080] In a possible implementation, the gear 16 on one side is connected to the output end of the second stepper motor.

[0081] In a possible implementation manner, the number of the electromagnet 15 , the spring 35 , and the hinge 36 is two, which are symmetrically arranged at both ends of the transverse beam 8 to enhance the operation stability of the scraper 37 .

[0082] Among them, the two electromagnets are energized and de-energized synchronously.

[0083] Optionally, the scraper shaft of the scraper 37 is inserted into the loose-leaf 36 at both ends, and the scraper 37 is fixedly connected to the loose-leaf 36, so that the scraper 37 can rotate up and down around the scraper shaft, assisted by the spring 35 and the electromagnet 15 to complete the up and down opening and closing drive of the scraper 37.

[0084] Beneficial effects:

[0085] The actuator in the rapid prototyping machine of the present application drives the optical fiber and the scanning lens to move during the prototyping process to realize the curing scanning of the workpiece cross section. The first stepper motor 1 drives the ball screw 6 to move in the longitudinal direction, and the screw nut 7 is connected to the transverse support 21 to drive the transverse axis to move, and the transverse support 21 moves along the longitudinal guide rail 17. The transverse direction is transmitted by the toothed belt 11, driving the transverse slider 12 to move in the transverse direction.

[0086] In this way, the ball screw 6 can ensure a certain transmission accuracy, and the toothed belt 11 transmission reduces the weight of the longitudinal movement. The longitudinal guide rail 17 ensures its movement accuracy and provides a certain support. The stepper motor 1 has the advantages of small size, large torque, good low-frequency characteristics, etc.

[0087] Due to the viscosity of the resin and the surface tension of the solidified resin, it will take a long time to achieve a smooth liquid surface by relying solely on the flow of the resin itself. The existing scraper mechanism of the molding machine can only perform reciprocating scraping operations, and the already scraped liquid surface may be scraped repeatedly, affecting the smoothness of the liquid surface.

[0088] The scraping mechanism in the rapid prototyping machine of the present application installs the scraper on the transverse beam 8 through the loose-leaf 36 and is driven by the first stepper motor 1. When scanning the workpiece, the electromagnet 15 is powered off, and the scraper 37 is pulled flat under the action of the spring 35 on the loose-leaf 36 and does not participate in scraping the liquid surface. When it is necessary to scrape flat, the electromagnet 15 is powered on to overcome the spring force and put the scraper 37 in a working state, thereby avoiding repeated scraping of the liquid surface.

[0089] The function of the focusing mechanism in the rapid prototyping machine of the present application is to enable the focusing lens to move up and down so that the focus falls exactly on the liquid surface, ensuring scanning accuracy and efficiency. Since the focusing point of the focusing spot is designed by the lens and its offset from the liquid surface is very small, only fine-tuning the lens up and down is considered here.

[0090] When the hand wheel 24 rotates, the worm shaft 25 drives the worm wheel 27 to rotate, and at the same time, the cam shaft 32 connected to the worm wheel rotates together, thereby driving the roller connecting rod 30 to move up and down, so as to achieve the up and down micro-movement of the lens 34.

[0091] The camshaft 32 has a curve transition in the middle, which can achieve a micro-motion space of 5 mm up and down and ensure smooth movement. When combined with the worm gear 27 and the worm shaft 25, when the hand wheel 24 rotates, the push rod can be slowly micro-moved to achieve fine-tuning of the lens 34.

[0092] In the several embodiments provided in the present application, it should be understood that the disclosed systems, modules and methods can be implemented in other ways. For example, the module embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, modules or units, which can be electrical, mechanical or other forms.

[0093] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. A light-curing rapid prototyping machine, characterized in that: include: Box body (18), actuator and scraping mechanism; The scraping mechanism comprises: an electromagnet (15), a spring (35), a hinge (36) and a scraper (37); One end of the spring (35) is fixedly connected to the upper hinge of the hinge (36), and the other end is fixedly connected to the lower hinge of the hinge (36), and the lower hinge is pulled to a position perpendicular to the upper hinge by the spring (35); the scraper (37) is fixedly connected to the lower hinge; The actuator is arranged on the box body (18), and the longitudinal moving end is fixedly connected to the upper hinge of the hinge (36), and is used to drive the scraper (37) to move longitudinally; The electromagnet (15) is fixedly arranged on the longitudinal moving end and is located below the upper hinge.

2. The light-curing rapid prototyping machine according to claim 1, characterized in that: The actuator comprises: two symmetrically arranged first stepper motors (1), two symmetrically arranged angular contact ball bearings (5), two symmetrically arranged ball screws (6), two symmetrically arranged screw nuts (7), two symmetrically arranged longitudinal guide rails (17), two symmetrically arranged bearing end covers (10) and a transverse beam (8); One end of the ball screw (6) is connected to the angular contact ball bearing (5), and the other end is connected to the bearing end cover (10); The first stepper motor (1) is arranged on a housing (18), and the output end is connected to an end of the ball screw (6) close to the angular contact ball bearing (5) through a fixed parallel coupling (2); The screw nut (7) is sleeved on the ball screw (6); the longitudinal guide rail (17) is arranged on the box body (18) and is located directly below the ball screw (6); One side of the connecting portion of the transverse beam (8) is fixedly connected to the lead screw nut (7), and the bottom surface of the connecting portion of the transverse beam (8) is slidably connected to the longitudinal guide rail (17).

3. The light-curing rapid prototyping machine according to claim 2, characterized in that: The upper hinge of the hinge (36) is fixedly connected to the upper part of the side wall of the transverse beam (8); The electromagnet (15) is fixedly arranged on the lower part of the side wall of the transverse beam (8) and is located below the upper hinge.

4. The light-curing rapid prototyping machine according to claim 2, characterized in that: The actuator also includes: a toothed belt (11), a transverse slider (12), a transverse guide rail block (13), a transverse guide rail (38) and two symmetrically arranged gears (16); The transverse guide rail (38) is fixedly arranged on the transverse crossbeam (8); The gear (16) is fixedly arranged on the connecting portion of the transverse beam (8), and the toothed belt (11) is meshingly connected with the two gears (16); The transverse slider (12) is engaged with the toothed belt (11); the transverse guide rail block (13) is fixedly connected to the transverse slider (12) and is slidably connected to the transverse guide rail (38).

5. The light-curing rapid prototyping machine according to claim 4, characterized in that: Also includes: A focusing mechanism, used to control the focusing lens to perform lifting and lowering movements; The focusing mechanism is fixedly connected to the transverse slider (12).

6. The light-curing rapid prototyping machine according to claim 5, characterized in that: The focusing mechanism comprises: a worm shaft (25), a lens support (26), a worm gear (27), a cam (32), and a lens (34); The mirror support (26) is fixedly connected to the transverse slider (12); One side of the worm wheel (27) is rotatably connected to the inner wall of the mirror holder (26), and the other side is coaxially fixedly connected to the cam (32); The worm shaft (25) passes through the mirror holder (26) and is connected to the worm wheel (27) through tooth matching; A roller (30) is arranged above the cam (32), and the roller (30) has a roller connecting rod (29) capable of following the movement of the roller (30), and the lens (34) is connected to the roller connecting rod (29).

7. The light-curing rapid prototyping machine according to claim 6, characterized in that: One end of the worm shaft (25) extending out of the mirror holder (26) is provided with a hand wheel (24).

8. The light-curing rapid prototyping machine according to claim 6, characterized in that: The lens (34) is connected to the roller connecting rod (29) via a lens connecting rod (28).

9. The light-curing rapid prototyping machine according to claim 4, characterized in that: The gear (16) on one side is connected to the output end of the second stepping motor.

10. The light-curing rapid prototyping machine according to claim 2, characterized in that: The number of the electromagnet (15), the spring (35) and the hinge (36) is two, and they are symmetrically arranged at the two ends of the transverse beam (8).

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