CN111516264A

CN111516264A - 3D printing platform capable of automatically separating and printing parts

Info

Publication number: CN111516264A
Application number: CN202010299846.5A
Authority: CN
Inventors: 陈岳林; 唐梅军; 王红; 田文靖
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-08-11

Abstract

The invention discloses a 3D printing platform capable of automatically separating printed parts, and relates to the technical field of 3D printing. Both of them are in a square plate structure, and a plurality of the plates are arranged in a staggered way. The fixed piece is provided with a bearing hole, a bearing is arranged in the bearing hole, the movable piece is provided with an elliptical hole corresponding to the bearing hole, and a cam is arranged in the elliptical hole. The rotating shaft penetrates through the bearing and the cam. And one side of the fixing piece positioned on the outermost side is fixedly provided with a motor, and an output shaft of the motor is fixedly connected with the rotating shaft. The motor drives the bearing and the cam to rotate, so that the movable sheet can move up and down corresponding to the fixed sheet, parts can be gradually opened and closed along a scissor shape at a certain angle, the stress between the parts and the platform can be reduced, the problem of part damage caused by overlarge separating force is solved, and the electric motor is small in size, light in weight, reasonable in design, ingenious in structure, convenient to operate, good in stability and convenient to assemble and maintain.

Description

3D printing platform capable of automatically separating and printing parts

Technical Field

The invention relates to the technical field of 3D printing, in particular to a 3D printing platform capable of automatically separating printed parts.

Background

3D printing (3 DP), a technique for constructing objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files, is one of the rapid prototyping techniques, also known as additive manufacturing. 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 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 (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

Current 3D printer print platform roughly divide into the platform that has the heating heat preservation function and does not have the platform that heats the heat preservation function, no matter be any platform, all have the printing part and accomplish the back, because the part is pasted closely with the platform bottom surface, the difficult problem of taking out. The mode of taking out the part that is commonly used at present is manual with shovel sword shovel, leads to the part to damage like this easily, and the operation is also inconvenient moreover, if the shower nozzle has not cooled off and just operates, still causes the scald easily.

Disclosure of Invention

In order to solve the problems, the invention adopts the following technical scheme:

A3D printing platform capable of automatically separating printed parts comprises a fixed sheet, a movable sheet, a motor and a rotating shaft;

the fixed sheet and the movable sheet are both in a square plate structure and are provided with a plurality of sheets which are arranged in a staggered manner;

bearing holes are symmetrically formed in the two sides of the center line of the fixing piece in the length direction respectively, and bearings are fixedly arranged in the bearing holes;

elliptical holes are symmetrically formed in two sides of the center line of the movable sheet in the length direction and correspond to the bearing holes;

a rotating shaft is rotatably arranged in the central hole and the elliptical hole of the bearing in a penetrating manner, a plurality of cams are sleeved on the rotating shaft and are positioned in the elliptical hole, and when the cams rotate, the movable sheet can move up and down under the limiting action of the elliptical hole;

the motor is fixedly arranged on one side of the fixing piece positioned on the outermost side, and an output shaft of the motor is fixedly connected with the rotating shaft.

The motor drives the bearing and the cam to rotate, the movable sheet can move up and down correspondingly to the fixed sheet, the parts can be gradually opened and closed along the scissors at a certain angle, the stress between the parts and the platform can be reduced, and the problem of part damage caused by overlarge separating force is avoided. The invention can effectively avoid the problems that the parts are easy to damage due to the separation of the scraper knife in the prior art, the operation is inconvenient, and the operation is easy to cause scalding if the spray head is not cooled completely.

Preferably, the length of the fixed plate is equal to that of the movable plate, and the width of the fixed plate is equal to that of the movable plate;

the height of the fixed plate is greater than that of the movable plate.

The height of the fixed plate is greater than that of the movable plate, so that the movable plate can have a certain space for ascending or descending operation after the tops of the fixed plate and the movable plate are flush.

Preferably, the motor comprises a direct current speed reducing motor, a motor base, a coupling and a sensor;

the motor base is of a pi-shaped structure, the top of the motor base is fixedly provided with the direct current speed reducing motor, and an output shaft of the direct current speed reducing motor penetrates through one side of the motor base and is connected with the coupler;

the sensor is arranged on one side of the motor base and is perpendicular to an output shaft of the direct-current speed reducing motor;

the coupler is provided with a jackscrew, and the jackscrew is matched with the sensor.

Preferably, the jackscrew is an iron inner hexagonal jackscrew, and the sensor is a hall sensor or an inductive sensor.

The position of the cam can be determined by detecting the jackscrew through the sensor, so that the accurate control during lifting is realized, a plurality of complicated links are saved by the design, and the design and manufacturing cost is reduced.

Preferably, the cam comprises a cam body, a shaft hole is formed in the cam body, a roller is rotatably arranged at the protruding end of the cam body in the length direction, and balls are rotatably arranged at the tops of two sides of the cam body in the width direction;

when the length direction of the cam is parallel to that of the movable sheet, the upper surface of the movable sheet is flush with that of the fixed sheet.

The cam body is provided with the roller and the ball, so that friction force can be reduced, and the service life of the cam and the movable sheet is prolonged.

Preferably, the floor further comprises a floor plate, wherein the floor plate comprises a floor plate body and spacing ribs;

the bottom plate body is of a plate-shaped structure, the spacing rib plates are arranged on the bottom plate body in parallel, and the width of each spacing rib plate is larger than that of each movable sheet;

a stator fixing hole is formed in a groove between every two adjacent spaced rib plates;

the fixing piece is fixedly arranged in the groove between the two adjacent spaced rib plates.

Preferably, the distance between the upper surface of the spacing rib and the lower surface of the movable piece is not less than the width value of the cam body.

The bottom plate can be in the same place stationary blade, movable piece monolithic stationary, utilizes the interval floor can make stationary blade, movable piece can free relative movement, has both guaranteed the interval and has not influenced each other, can assemble fast again, has improved the installation effectiveness greatly.

Preferably, the fixing device further comprises a control unit fixed on one side of the fixing sheet positioned on the outermost side;

a circuit board is arranged in the control unit, and a microcontroller, a motor driving circuit and a sensor sampling isolation circuit are welded on the circuit board;

the circuit board is respectively connected with the direct current speed reducing motor and the sensor through leads.

Preferably, the upper surfaces of the fixed plate and the movable plate are both subjected to surface roughening treatment. This has the advantage of better conforming to the printed part to prevent lifting.

The motor drives the bearing and the cam to rotate, so that the movable sheet can move up and down corresponding to the fixed sheet, parts can be gradually opened and closed along a scissor shape at a certain angle, the stress between the parts and the platform can be reduced, the problem of part damage caused by overlarge separating force is solved, and the electric motor is small in size, light in weight, reasonable in design, ingenious in structure, convenient to operate, good in stability and convenient to assemble and maintain.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the embodiment provided by the present invention;

FIG. 2 is a schematic illustration of a partial explosion of an embodiment provided by the present invention;

FIG. 3 is a view showing the position and structure of the fixed and movable plates on the rotating shaft;

FIG. 4 is a schematic perspective view of a movable plate according to an embodiment of the present invention;

FIG. 5 is a front view of a movable plate in an embodiment provided by the present invention;

FIG. 6 is a schematic perspective view of a cam in an embodiment provided by the present invention;

FIG. 7 is a front view of a cam in an embodiment provided by the present invention;

FIG. 8 is a perspective view of a motor in an embodiment provided by the present invention;

fig. 9 is a perspective view of a base plate in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described clearly and completely with reference to fig. 1 to 9 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

As shown in fig. 1 to 9, a 3D printing platform capable of automatically separating printed parts includes a fixed plate 1, a movable plate 2, a motor 3, and a rotating shaft 4. The fixed plate 1 and the movable plate 2 are both in a square plate structure, the length of the fixed plate 1 is equal to that of the movable plate 2, and the widths of the fixed plate 1 and the movable plate 2 are also equal. The height of the fixed plate 1 is greater than that of the movable plate 2. And a plurality of the platforms are arranged and are mutually staggered to form a square platform with a flush top. The upper surfaces of the fixed plate 1 and the movable plate 2 are both subjected to surface roughening treatment. This has the advantage of better conforming to the printed part to prevent lifting. When the printer is used for printing, materials sprayed out of the spray head are accumulated on the upper surfaces of the fixed sheet 1 and the movable sheet 2.

As shown in fig. 2 and 3, bearing holes 11 are symmetrically formed in both sides of a center line of the stator 1 in the longitudinal direction, and bearings 12 are fixedly disposed in the bearing holes 11. Similarly, elliptical holes 21 are symmetrically formed in both sides of the center line of the movable plate 2 in the longitudinal direction, and the elliptical holes 21 correspond to the bearing holes 11. The pivot 4 is rotatable worn to be equipped with in the centre bore of bearing 12 and the elliptical aperture 21, and the cover is equipped with a plurality of cams 22 on the pivot 4, and a plurality of cams 22 are located elliptical aperture 21, and when cam 22 rotated, under the limiting displacement of elliptical aperture 21, movable plate 2 can reciprocate.

In order to reduce the friction force and improve the service life of the cam and the movable plate, as shown in fig. 6 and 7, the cam 22 includes a cam body 220, a shaft hole 221 is formed on the cam body 220, a roller 222 is rotatably disposed at a protruding end of the cam body 220 in the length direction, and balls 223 are rotatably disposed at tops of two sides of the cam body 220 in the width direction. When the longitudinal direction of the cam 22 and the longitudinal direction of the movable piece 2 are parallel to each other, the upper surface of the movable piece 2 and the upper surface of the stationary piece 1 are flush with each other.

One side of the fixing sheet 1 positioned at the outermost side is fixedly provided with a motor 3, and an output shaft of the motor 3 is fixedly connected with a rotating shaft 4 through a coupler.

The motor 3 includes a dc geared motor 30, a motor base 31, a coupling 32, and a sensor 33. The motor base 31 is of a pi-shaped structure, the top of the motor base is fixedly provided with a direct current speed reducing motor 30, and an output shaft of the direct current speed reducing motor 30 penetrates through one side of the motor base 31 and is connected with a coupler 32. One side of the motor base 31 is provided with a sensor 33, and the sensor 33 is perpendicular to the output shaft of the dc gear motor 30. The coupling 32 is provided with a jack screw 320, and the jack screw 320 is matched and corresponding to the sensor 33. Preferably, the jackscrew 320 is an iron hexagon socket head and the sensor 33 is a hall sensor or an inductive sensor.

Further, as shown in fig. 1 and 9, the floor panel 5 is further provided, and the floor panel 5 includes a floor panel body 50 and a spacer rib 51. The bottom plate body 50 is a plate-shaped structure, and the spacing rib plates 51 are arranged on the bottom plate body in parallel, and the width of the spacing rib plates 51 is larger than that of the movable plate 2. The slot between two adjacent spacer ribs 51 is provided with a stator fixing hole 52. The fixing piece 1 is fixedly arranged in the groove between two adjacent spacing rib plates 51 through bolts and fixing holes. It should be noted that the distance between the upper surface of the spacer rib 51 and the lower surface of the movable plate 2 is not less than the width of the cam body 220, and the movable plate can have enough space for movement by taking care

In order to realize the modularization splicing, the printer does not need to be changed too much, and the printer further comprises a control unit 6, wherein the control unit 6 is fixed on one side of the fixing sheet 1 positioned on the outermost side. A circuit board is arranged in the control unit 6, and a microcontroller, a motor driving circuit and a sensor sampling isolation circuit are welded on the circuit board. The circuit board is connected with the direct current speed reducing motor 30 and the sensor 33 through leads respectively. It should be noted here that if the control unit does not need to be connected to the printer, a control switch may be provided on the control unit, and the component separation operation may be manually turned on after printing. If the automatic separation device is required to be connected with an original printer, parts can be automatically separated after printing is finished, a communication interface can be arranged in the control unit and is connected with a control circuit of the printer, and after printing is finished, the printer can output a signal to the control unit to serve as a signal for automatically starting separation.

When the automatic leveling device works specifically, the whole platform is installed on the original platform of the printer, and then leveling and calibration are carried out. In the initial state, the microcontroller can determine the position of the cam by detecting the jackscrew 320 by the sensor 33, and if the length direction of the cam is not parallel to the length direction of the movable piece 2, the motor is controlled to rotate so as to be parallel to each other. When parallel, the sensor receives a signal, and the pressing can be carried out at the moment. After printing the completion, manual or the automatic signal of giving control unit 6 of printer, microcontroller on the control circuit board passes through motor 3 and drives bearing 12, cam 22 and rotate, can realize the corresponding stationary blade 1 up-and-down motion of activity piece 2, can realize the part and open and shut the separation gradually along certain angle scissors form moreover, can reduce the atress between part and the platform, avoids appearing the problem that the part damaged because of the separating force is too big. The method comprises the following specific steps:

1. left side separation: only the motor on the left side drives the bearing 12 and the cam 22 to rotate, and the motor on the right side does not move, so that the movable sheet 2 rotates along the shaft of the stationary motor as a center, and the cross separation similar to scissors is achieved, and the stress of all the movable sheets is reduced. And finally, the left part can be separated from the fixed sheet and the movable sheet.

2. And (3) separating the right side: this step is similar to the above-described step except that the motor that was originally rotating is stationary and the other motor is rotating, thus effecting separation of the other side of the part.

3. And finally, separating, wherein the two motors rotate simultaneously to drive the parts to move upwards to be completely separated from the fixing piece.

Claims

1. A3D printing platform capable of automatically separating printed parts is characterized by comprising a fixed plate (1), a movable plate (2), a motor (3) and a rotating shaft (4);

the fixed sheet (1) and the movable sheet (2) are both in a square plate structure and are provided with a plurality of sheets which are arranged in a staggered manner;

two sides of the center line of the length direction of the fixed sheet (1) are respectively symmetrically provided with a bearing hole (11), and bearings (12) are fixedly arranged in the bearing holes (11);

elliptical holes (21) are symmetrically formed in two sides of the center line of the movable plate (2) in the length direction respectively, and the elliptical holes (21) correspond to the bearing holes (11) mutually;

a rotating shaft (4) is rotatably arranged in a center hole of the bearing (12) and the elliptical hole (21) in a penetrating manner, a plurality of cams (22) are sleeved on the rotating shaft (4), the plurality of cams (22) are positioned in the elliptical hole (21), and when the cams (22) rotate, the movable plate (2) can move up and down under the limiting effect of the elliptical hole (21);

the motor (3) is fixedly arranged on one side of the fixing piece (1) located on the outermost side, and an output shaft of the motor (3) is fixedly connected with the rotating shaft (4).

2. The 3D printing platform capable of automatically separating printed parts according to claim 1, wherein:

the length of the fixed plate (1) is equal to that of the movable plate (2), and the widths of the fixed plate and the movable plate are also equal;

the height of the fixed plate (1) is greater than that of the movable plate (2).

3. The 3D printing platform capable of automatically separating printed parts according to claim 1, wherein:

the motor (3) comprises a direct-current speed reducing motor (30), a motor base (31), a coupler (32) and a sensor (33);

the motor base (31) is of a pi-shaped structure, the top of the motor base is fixedly provided with the direct current speed reducing motor (30), and an output shaft of the direct current speed reducing motor (30) penetrates through one side of the motor base (31) and is connected with the coupler (32);

the sensor (33) is arranged on one side of the motor base (31), and the sensor (33) is perpendicular to an output shaft of the direct-current speed reduction motor (30);

the coupling (32) is provided with a jackscrew (320), and the jackscrew (320) is matched and corresponds to the sensor (33).

4. The 3D printing platform capable of automatically separating printed parts according to claim 3, wherein:

the jackscrew (320) adopts the iron hexagon socket head cap screw, sensor (33) are hall sensor or inductive transducer.

5. The 3D printing platform capable of automatically separating printed parts according to claim 1, wherein:

the cam (22) comprises a cam body (220), a shaft hole (221) is formed in the cam body (220), a roller (222) is rotatably arranged at the protruding end of the cam body (220) in the length direction, and balls (223) are rotatably arranged at the tops of two sides of the cam body (220) in the width direction;

when the length direction of the cam (22) is parallel to the length direction of the movable sheet (2), the upper surface of the movable sheet (2) is flush with the upper surface of the fixed sheet (1).

6. The 3D printing platform capable of automatically separating printed parts according to claim 1, wherein:

the floor structure further comprises a bottom plate (5), wherein the bottom plate (5) comprises a bottom plate body (50) and spaced rib plates (51);

the bottom plate body (50) is of a plate-shaped structure, the interval rib plates (51) are arranged on the bottom plate body in parallel, and the width of each interval rib plate (51) is larger than that of each movable plate (2);

a stator fixing hole (52) is arranged in a groove between two adjacent spaced rib plates (51);

the fixing piece (1) is fixedly arranged in a groove between two adjacent spacing rib plates (51).

7. The 3D printing platform capable of automatically separating printed parts according to claim 6, wherein:

the distance between the upper surface of the spacing rib plate (51) and the lower surface of the movable plate (2) is not less than the width value of the cam body (220).

8. The 3D printing platform capable of automatically separating printed parts according to claim 3, wherein:

the fixing device further comprises a control unit (6), wherein the control unit (6) is fixed on one side of the fixing piece (1) located on the outermost side;

a circuit board is arranged in the control unit (6), and a microcontroller, a motor driving circuit and a sensor sampling isolation circuit are welded on the circuit board;

the circuit board is respectively connected with the direct current speed reducing motor (30) and the sensor (33) through leads.

9. The 3D printing platform capable of automatically separating printed parts according to claim 1, wherein:

the upper surfaces of the fixed plate (1) and the movable plate (2) are both subjected to surface roughening treatment.