CN112477131A

CN112477131A - Planar driving mechanism for 3D printing

Info

Publication number: CN112477131A
Application number: CN202011130865.1A
Authority: CN
Inventors: 姜晓通; 吴科; 邓昊; 李瑶; 王明; 王伟骅
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-03-12

Abstract

The invention provides a plane driving mechanism for 3D printing, which comprises a vertical printing component and a horizontal driving component, wherein the vertical printing component comprises a printing head for layer-by-layer forming and a vertical driving module, and the printing head is driven to move along the vertical direction by the vertical driving module; the horizontal driving assembly is used for driving the vertical printing assembly to move along the horizontal plane direction; the horizontal driving assembly drives the vertical printing assembly to move through a belt, a position sensor is arranged on the belt, and a clamping module is arranged at a position close to the belt; the position sensor is used for detecting the position of the vertical printing assembly in the horizontal direction; the position sensor is used for controlling the clamping module to clamp the belt, so that the vertical printing assembly is limited to move along the horizontal plane direction.

Description

Planar driving mechanism for 3D printing

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a plane driving mechanism for 3D printing, and further particularly relates to a 3D printer.

Background

The 3D printer is a rapid prototyping technology, also known as additive manufacturing, which is a technology that constructs an object by using bondable materials such as powdered metal or plastic based on a digital model file and by printing layer by layer.

3D printing is typically achieved using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and then is gradually used for directly manufacturing some products, and parts printed by the technology are already available; the technology has applications in jewelry, footwear, industrial design, construction, engineering and construction, automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

However, since the 3D printing works in a layered processing manner, the 3D printing device needs high precision to realize the quality of printed products, wherein the precision of the driving structure of the printing head needs to be ensured, and the printing head is moved to a fixed position for convenience and accuracy.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a planar driving mechanism for 3D printing.

In one aspect, the present invention provides a planar driving mechanism for 3D printing, including:

the horizontal driving component is used for driving the printing head to move along the horizontal plane direction; wherein the content of the first and second substances,

the horizontal driving component is driven by a belt so as to drive the printing head;

a position sensor is arranged on the belt, and a clamping module used for limiting the movement of the belt is arranged at the power end close to the horizontal driving assembly;

the position sensor is used for measuring the horizontal position of the printing head;

and controlling the clamping module through the position sensor, so that the clamping module clamps the belt, and the horizontal position of the printing head is limited.

Preferably, the horizontal driving assembly comprises a first driving assembly and a second driving assembly, the second driving assembly drives the first driving assembly to move, and the first driving assembly drives the printing head to move;

and the driving direction of the second driving assembly and the driving direction of the first driving assembly are arranged to be perpendicular to each other, so that the printing head moves along the horizontal plane direction.

Preferably, the second drive assembly comprises a support bracket to which the second drive assembly is fixed; the first driving assembly comprises two cross beams, and the cross beams are lapped between the two support frames.

Preferably, the second driving assembly further comprises a belt transmission module used as a belt transmission structure and a driving motor used for driving the belt transmission module.

Preferably, the clamping module comprises a finger cylinder and a clamping block, wherein the clamping block is installed at the movable end of the finger cylinder;

the clamping blocks are driven to be closed through the finger cylinders, so that the clamping blocks clamp the belt, and the belt transmission is limited.

Preferably, the clamping block is provided with a tooth-shaped protrusion and/or a groove corresponding to the tooth-shaped protrusion, so that when the clamping block is closed, the tooth-shaped protrusion is engaged with the groove.

Preferably, the driving motor is mounted on the support frame on one side, and the belt transmission modules mounted on the two support frames are connected through a transmission rod;

and the driving motor drives the two belt transmission modules to move through the transmission rod.

Preferably, the position sensor comprises a grating sensor, a grating ruler of the grating sensor is arranged on the beam and the support frame, and an induction end of the grating sensor is arranged on the belt, so that the induction end of the grating sensor corresponds to the grating ruler, and the position is detected.

In another aspect, the present invention provides a 3D printer comprising a horizontal driving mechanism as described above, an

The vertical printing component is provided with a mounting position of a printing head;

the forming platform is used for bearing the bearing structure of the formed part;

the horizontal driving mechanism drives the vertical printing assembly to move in the horizontal direction, and the vertical printing assembly and the forming platform move relatively in the vertical direction.

Preferably, the vertical printing assembly comprises a vertical driving part for driving a print head, the vertical driving part being mounted at a movable end of the horizontal driving mechanism;

the vertical driving part is driven by a screw rod, so that the vertical driving part drives the printing head to move along the vertical direction.

Compared with the prior art, the invention has the beneficial effects that:

according to the 3D printing plane driving mechanism, the printing head is driven in a belt driving mode, meanwhile, the position sensor is arranged on the belt, the position perpendicular to the printing component is convenient to detect, the clamping module is arranged at the position close to the belt, the belt is clamped by the clamping module, the belt is limited to move, the position of the printing head is accurately controlled by the position sensor and the clamping module, and therefore manufacturing cost is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a first schematic perspective view of an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a second schematic perspective view illustrating an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a schematic perspective view of a clamping module according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a 3D printer according to an embodiment of the invention;

FIG. 7 is a schematic perspective view of a vertical printing assembly according to an embodiment of the present invention.

Shown in the figure:

11. a vertical printing assembly; 111. a print head; 112. a slide bar; 113. a vertical driving module; 114. a screw rod; 115. a nut seat; 116. a fixed seat; 12. a first drive assembly; 121. a cross beam; 122. a transmission module; 123. a position sensor; 124. connecting blocks; 13. a second drive assembly; 131. a support frame; 132. a drive motor; 133. a belt transmission module; 134. a clamping module; 1341. a finger cylinder; 1342. a clamping block; 135. a transmission rod; 21. and (4) forming a platform.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, "depth" corresponds to the dimension from front to back, "closed" indicates that the vehicle is easy to pass but not accessible to the operator, and "annular" corresponds to the circular shape. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

As shown in fig. 6, a 3D printer includes a vertical printing component 11 including a printing head 11, a horizontal driving component and a forming platform 21, the horizontal driving component drives the vertical printing component 11 to move in a horizontal plane direction, so as to adjust a position of the printing head 11 relative to the forming platform 21, and facilitate the printing head 11 to form a product; wherein the content of the first and second substances,

the print head 111 is used to form a product layer by layer; meanwhile, in order to facilitate the layer-by-layer formation of the print head 111, in one embodiment, the vertical printing assembly 11 includes a vertical driving module 113 to drive the print head 111 to move in the vertical direction through the vertical driving module 113, so as to adjust the distance between the print head 111 and the forming platform 21 in the vertical direction.

In another embodiment, a vertical driving device is included in the forming platform 21, and the forming platform 21 is pushed by the vertical driving device, so as to adjust the distance between the printing head 111 and the forming platform 21.

In general, the solution that the print head 111 and the forming platform 21 move relatively in the vertical direction, so as to adjust the distance from the print head 111 to the forming platform 21 should be regarded as the technical solution of the present invention.

In the existing 3D printing device, in order to improve the precision in the processing engineering, a lead screw is generally used for transmission, so that the precise positioning of the fixed position is conveniently realized, and specifically, the printing head 111 is conveniently and accurately fixed at the required position; the transmission mechanisms of general belt transmission and chain transmission have oscillation in the transmission process, so that the transmission mechanisms of belt transmission and chain transmission are not easy to be accurately positioned like lead screw transmission and cannot be widely used in printing equipment; the lead screw is a common transmission device in precise 3D printing equipment due to high precision, but the lead screw with high precision has short service life and high price, so that the manufacturing cost of the 3D printing equipment is high and the price is difficult to reduce, and the 3D printing equipment is difficult to popularize in daily production.

Therefore, the mechanism convenient for controlling the belt to move is provided, and the belt is conveniently and accurately limited at a fixed position by the mechanism, so that the mechanism meets the precision requirement which can be met by screw rod transmission.

As shown in fig. 1-4, in one embodiment, a horizontal drive assembly for driving the vertical printing assembly 11 to move in a horizontal direction; the horizontal driving assembly drives the vertical printing assembly 11 to move through a belt, a position sensor 123 is arranged in the horizontal driving assembly, the position sensor 123 is fixedly arranged on the belt, and the clamping module 13 is arranged at a position close to a driving source in the horizontal driving assembly, clamping ends of the clamping module 13 are arranged on two sides of the belt, and when the clamping module 13 works, the clamping ends of the clamping module 13 clamp the belt, so that the movement of the belt is limited;

the position sensor 123 is used for detecting the horizontal position distance relationship of the vertical printing component 11; the clamping module 134 is controlled by the position sensor 123, so that the clamping module 134 clamps the belt to limit the movement of the vertical printing element 11 in the horizontal plane direction, and in the above manner, the oscillation generated when the belt is halted is avoided, so as to ensure the accurate positioning of the vertical printing element 11.

In a preferred embodiment, the horizontal driving assembly includes a first driving assembly 12 and a second driving assembly 13, the second driving assembly 13 drives the first driving assembly 12 to move, and the first driving assembly 12 drives the vertical printing assembly 11 to move;

the movement of the vertical printing assembly 11 in the horizontal plane direction is caused by setting the driving direction of the second driving assembly 13 and the driving direction of the first driving assembly 12 to be perpendicular to each other.

The second driving assembly 13 comprises a supporting frame 131 for fixing the second driving assembly 13; the first driving assembly 12 includes two cross members 121, and the number of the supporting frames 131 is two, and the cross members 121 are overlapped on the two supporting frames 131.

Specifically, the first driving assembly 12 and the second driving assembly 13 respectively include a driving motor 132 therein, and the driving motor 132 drives the belts in the first driving assembly 12 and the second driving assembly 13 respectively, so as to move the belts.

The second driving assembly 13 further comprises a belt transmission module 133 serving as a belt transmission structure and a driving motor 132 for driving the belt transmission module 133; further, the belt transmission module 133 includes two belt pulleys, and the belt is tensioned by the two belt pulleys, and the driving motor 132 drives the belt pulleys to rotate, so as to drive the belt to move by using the friction between the belt pulleys and the belt.

As shown in fig. 5, the clamping module 134 includes a finger cylinder 1341, a clamping block 1342, the clamping block 1342 is mounted at the movable end of the finger cylinder 1341; the clamping blocks 1342 are driven to close by the finger cylinder 1341, so that the clamping blocks 1342 clamp the belt, thereby limiting belt transmission.

Furthermore, the clamping block 1342 is provided with a tooth-shaped protrusion and/or a groove corresponding to the tooth-shaped protrusion, so that when the clamping block 1342 is folded, the tooth-shaped protrusion and the groove are engaged with each other, thereby increasing the friction force of the clamping block 1342 on the belt and facilitating the limitation of the movement of the belt.

The driving motor 132 is installed on the supporting frame 131 at one side, and the belt transmission modules 133 installed on the two supporting frames 131 are connected through a transmission rod 135; the second driving assembly 13 is driven by the two belt transmission modules 133, and the driving motor 132 drives the two belt transmission modules 133 to move by using the transmission rod 135. And meanwhile, the transmission rod 135 is connected with the two belt transmission modules 133, and the two belt transmission modules 133 are synchronously driven by the driving motor 132, so that the control logic is simplified, and the synchronous movement is convenient to realize.

The vertical printing assembly 11 comprises a fixing plate 116 for fixing, the fixing plate 116 being mounted on the belt such that the vertical printing assembly 11 moves with the horizontal driving assembly;

as shown in fig. 7, in a preferred embodiment, the vertical driving module 113 drives a lead screw 114, the fixing plate 116 is provided with a nut seat 115, the vertical driving module 113 is fixed to the print head 111, and the vertical driving module 113 drives the lead screw 114 through the threaded connection between the lead screw 114 and the nut seat 115, so that the print head 111 moves in the vertical direction.

A slide bar 112 is installed between the fixing plate 116 and the vertical driving module 113, the slide bar 112 slides in the vertical direction, and the moving direction of the print head 111 is guided by the slide bar 112.

This 3D printer still includes the support that is used for supporting perpendicular printing element 11, horizontal drive subassembly, shaping platform 21, thereby conveniently fixes perpendicular printing element 11, horizontal drive subassembly, shaping platform 21's support on the support and forms the main part work structure of 3D printer.

In a preferred embodiment, the bracket is formed by splicing channel steel; wherein, position sensor 123 includes grating sensor, and grating sensor's grating chi is installed on crossbeam 121, support frame 131, and crossbeam 121, support frame 131 are made by the channel-section steel, and grating sensor's response end is installed on the belt for grating sensor's response end corresponds grating chi, thereby detects the position.

The 3D printer provided by the invention should further include a control device and a power supply device, the corresponding actuating mechanisms should include corresponding actuating mechanisms and the like, and the 3D printer also includes a main assembly body housing and the like, so as to facilitate the beneficial effects of the position sensor 123 on the actuating mechanisms and the clamping module 134, and further description is omitted here

The invention provides a 3D printing plane driving mechanism and a 3D printer, wherein a printing head is driven by a belt transmission mode, meanwhile, a position sensor is arranged on the belt, so that the position vertical to a printing component is conveniently detected, a clamping module is arranged at a position close to the belt, the clamping module clamps the belt and limits the movement of the belt, and the position of the printing head is accurately controlled by the position sensor and the clamping module, so that the manufacturing cost is reduced; the horizontal driving assembly is used for driving the vertical printing assembly to move relative to the forming platform, so that the 3D printer is convenient to implement a layer-by-layer forming process.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A planar driving mechanism for 3D printing, comprising:

the horizontal driving assembly is used for driving the printing head (111) to move along the horizontal plane direction; wherein the content of the first and second substances,

the horizontal driving component is driven by a belt so as to drive the printing head (111);

a position sensor (123) is mounted on the belt, and a clamping module (134) used for limiting the movement of the belt is mounted at the power end close to the horizontal driving assembly;

the position sensor (123) is used for measuring the horizontal position of the printing head (111);

-controlling the clamping module (134) by means of the position sensor (123) such that the clamping module (134) clamps the belt, thereby limiting the horizontal position of the print head (111).

2. The planar driving mechanism for 3D printing according to claim 1, wherein the horizontal driving assembly comprises a first driving assembly (12) and a second driving assembly (13), the second driving assembly (13) drives the first driving assembly (12) to move, and the first driving assembly (12) drives the print head (111) to move;

movement of the print head (111) in the horizontal plane direction is caused by arranging the driving direction of the second driving assembly (13) and the driving direction of the first driving assembly (12) to be perpendicular to each other.

3. A planar drive mechanism for 3D printing according to claim 2, wherein the second drive assembly (13) comprises a support frame (131) to which the second drive assembly (13) is fixed; the first driving assembly (12) comprises two cross beams (121), the number of the supporting frames (131) is two, and the cross beams (121) are lapped between the two supporting frames (131).

4. A planar drive mechanism for 3D printing according to claim 3, wherein the second drive assembly (13) further comprises a belt transmission module (133) as a belt transmission structure and a drive motor (132) for driving the belt transmission module (133).

5. The planar driving mechanism for 3D printing according to claim 1, wherein the clamping module (134) comprises a finger cylinder (1341), a clamping block (1342), the clamping block (1342) is mounted at a movable end of the finger cylinder (1341);

the clamping block (1342) is driven to close by the finger cylinder (1341), so that the clamping block (1342) clamps the belt, thereby limiting the belt transmission.

6. The planar driving mechanism for 3D printing according to claim 5, wherein the clamping block (1342) is provided with a tooth-shaped protrusion and/or a groove corresponding to the tooth-shaped protrusion, such that when the clamping block (1342) is closed, the tooth-shaped protrusion engages with the groove.

7. The planar driving mechanism for 3D printing according to claim 4, wherein the driving motor (132) is installed on one side of the supporting frame (131), and the belt transmission modules (133) installed on the two supporting frames (131) are connected through a transmission rod (135);

the driving motor (132) drives the two belt transmission modules (133) to move through the transmission rod (135).

8. The planar driving mechanism for 3D printing according to claim 3, wherein the position sensor (123) comprises a grating sensor, a grating ruler of the grating sensor is mounted on the beam (121) and the supporting frame (131), and a sensing end of the grating sensor is mounted on the belt, so that the sensing end of the grating sensor corresponds to the grating ruler, thereby detecting the position.

9. A 3D printer comprising a horizontal drive mechanism as claimed in any one of claims 1 to 8, and

a vertical printing component (11) on which a mounting position of a printing head (111) is arranged;

a forming platform (21) for receiving a load-bearing structure of a formed part;

the horizontal driving mechanism drives the vertical printing assembly (11) to move in the horizontal direction, and the vertical printing assembly (11) and the forming platform (21) move relatively in the vertical direction.

10. The 3D printer according to claim 9, characterized in that the vertical printing assembly (11) comprises a vertical drive for driving a print head (111), the vertical drive being mounted at a movable end of the horizontal drive mechanism;

the vertical driving part is transmitted through a screw rod (11), so that the vertical driving part drives the printing head (111) to move along the vertical direction.