阅读说明：本技术 一种3d打印用激光床 (3D prints and uses laser bed ) 是由 陆东波 徐冰 于 2021-09-11 设计创作，主要内容包括：本发明公开了一种3D打印用激光床,包括具有承载腔的激光床和位于承载腔内的承载板,承载板内上端阵列开设有通腔,通腔内及承载板内下端之间设有滑块组件,通腔连通有连通腔和吸管,连通腔和吸管分别连通有填充组件和气泵组件,连通腔内连通有挡板腔,挡板腔内滑动设有挡板,通腔一侧内壁还连通有位于吸管下方的弹块腔,弹块腔内设有弹块,弹块与弹块腔内壁之间固定设有弹簧,弹块与挡板之间设有联动绳,滑动组件向下滑动至吸管处时能通过填充组件自连通腔对承载板上侧进行金属粉末的填充工作,滑动组件继续向下至弹块腔处时挡板封闭挡板腔,能通过气泵组件对承载板上侧的金属粉末进行抽取工作。本发明填充效率较高,利于粉末熔化及烧结工作。(The invention discloses a laser bed for 3D printing, which comprises a laser bed with a bearing cavity and a bearing plate positioned in the bearing cavity, wherein a through cavity is formed in the upper end of the bearing plate in an array mode, a sliding block assembly is arranged in the through cavity and between the lower end of the inside of the bearing plate, the through cavity is communicated with a communicating cavity and a suction pipe, the communicating cavity and the suction pipe are respectively communicated with a filling assembly and a gas pump assembly, a baffle cavity is communicated with a baffle cavity, a baffle is arranged in the baffle cavity in a sliding mode, an elastic block cavity is also communicated with an elastic block cavity below the suction pipe on the inner wall of one side of the through cavity, an elastic block is arranged in the elastic block cavity, a spring is fixedly arranged between the elastic block and the inner wall of the elastic block cavity, a linkage rope is arranged between the elastic block and the baffle, when the sliding assembly slides downwards to the suction pipe, metal powder can be filled in the upper side of the bearing plate from the communicating cavity through the filling assembly, when the sliding assembly continues to the position of the elastic block cavity, the baffle cavity is closed, and the metal powder on the upper side can be extracted through the bearing plate assembly. The invention has higher filling efficiency and is beneficial to powder melting and sintering work.)

1. The utility model provides a 3D prints and uses laser bed, including having the laser bed who bears the weight of the chamber and being located the loading board that bears the weight of the intracavity, a serial communication port, laser bed slidable sets up and is bearing the weight of the intracavity, it has metal powder to fill between loading board top and the laser bed top, upper end array has seted up logical chamber in the loading board, it is equipped with sliding block set spare to lead to in the intracavity and the loading board between the lower extreme, it has intercommunication chamber and straw to lead to chamber one side inner wall top-down intercommunication, intercommunication chamber and straw communicate respectively and have packing subassembly and air pump subassembly, intercommunication intracavity intercommunication has the baffle chamber, baffle intracavity slides and is equipped with the baffle, the fixed compression spring that is equipped with between baffle and the baffle intracavity wall, it still communicates the bullet piece chamber that is located the straw to lead to chamber one side inner wall, it is equipped with the bullet piece to slide the intracavity, it is fixed to be equipped with the spring to play piece and be equipped with the linkage rope between bullet piece and the baffle, the slip subassembly can carry out gold from the intercommunication chamber to the loading board upside through the packing subassembly when sliding to straw department Belong to the filling work of powder, baffle closed baffle chamber when slip subassembly continues to the bullet piece chamber department downwards can extract the work to the metal powder of loading board upside through air pump assembly.

2. The laser bed for 3D printing as claimed in claim 1, wherein the slide assembly includes a slide cavity at the lower end of the loading plate and a slide plate slidably disposed in the slide cavity, the top end surface of the slide plate is arrayed and fixedly provided with a connecting rod, and the connecting rod extends away from one end of the slide plate to a through cavity in which the slide block is fixedly disposed.

3. The laser bed for 3D printing according to claim 2, wherein the slider closes the communication chamber when the slider is located at the communication chamber.

4. The laser bed for 3D printing as claimed in claim 2, wherein the slider abuts against the elastic block when continuing to move down to the elastic block cavity, so that the elastic block slides into the elastic block cavity and further the linkage rope is loosened, and the compression spring drives the baffle to slide into the communication cavity and close the communication cavity.

5. The laser bed for 3D printing as claimed in claim 2, wherein a telescopic motor and a power shaft are fixedly arranged in the bearing plate and on the upper side of the sliding cavity, a telescopic sleeve is connected to the outer circular surface of the power shaft in a threaded manner, and the telescopic sleeve extends into the sliding cavity and is fixedly connected with the upper end surface of the sliding plate.

6. The laser bed for 3D printing as claimed in claim 1, wherein the filling assembly comprises a sliding cavity located in the bearing cavity and a piston located in the sliding cavity, the sliding cavity is filled with metal powder, the piston is slidably disposed in the sliding cavity, and the communication cavity is communicated with the sliding cavity through a hose.

7. The 3D printing laser bed as claimed in claim 6, wherein the sliding chamber is connected with a closed chamber, the inner wall of the closed chamber is connected with a control chamber, a closed plate is slidably arranged in the control chamber, a magnet is fixedly arranged at one end in the closed plate, an electromagnet capable of being magnetically connected with the magnet is fixedly arranged on the inner wall of the control chamber close to one side of the magnet, a pressure spring is fixedly arranged between the electromagnet and the closed plate, and a hose is arranged between the closed chamber and the sliding chamber.

8. The laser bed for 3D printing according to claim 1, wherein the air pump assembly comprises a temporary storage cavity at the lower end of the laser bed, an air pump is fixedly arranged in the laser bed and at one side of the temporary storage cavity, and the suction pipe is used for communicating the air pump with the through cavity.

9. The laser bed for 3D printing as claimed in claim 1, wherein a lifting assembly is disposed in the laser bed and on one side of the carrier plate, and the lifting assembly can drive the carrier plate to slide up and down in the carrier cavity.

10. The laser bed for 3D printing according to claim 9, wherein the lifting assembly includes a lifting chamber communicating with the inner wall of the sliding chamber, a lifting motor is fixedly disposed in the laser bed and located at a lower side of the lifting chamber, a rotating shaft is dynamically connected to an end surface of the lifting motor near the lifting chamber, the rotating shaft extends into the lifting chamber and is threadedly connected with a threaded block, and one end of an outer circumferential surface of the threaded block is fixedly connected with an outer circumferential surface of the bearing plate.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a laser bed for 3D printing.

Background

The selective laser melting printing technology is one of 3D printing, and generally comprises the steps of paving metal powder on a laser bed, sintering the metal powder through laser to finish printing one layer of a three-dimensional model, then continuously filling the powder, flattening the powder through a roller, continuously sintering the powder through the laser, and then finishing printing one layer by one layer.

Most selectivity laser melting platform fills the powder through the confession powder mechanism that is independent of laser bed to print platform, but this type of filling mode speed is slower, packing efficiency is lower, because consuming time is longer, the temperature reduces, when printing again on former printing, with the junction between the printing before defect such as bubble appear, after printing simultaneously, need the manual work to carry out vacuum suction to the metal powder on the print platform, it is consuming time longer, and need the manual work to handle, consume the manpower.

Disclosure of Invention

The invention aims to solve the technical problem of providing a laser bed for 3D printing aiming at the defects in the prior art.

According to the invention, the laser bed for 3D printing comprises a laser bed with a bearing cavity and a bearing plate located in the bearing cavity, the laser bed is slidably arranged in the bearing cavity, metal powder is filled between the top of the bearing plate and the top of the laser bed, the upper end in the bearing plate is provided with a through cavity in an array mode, a sliding block assembly is arranged in the through cavity and between the lower end in the bearing plate, the inner wall on one side of the through cavity is communicated with a communication cavity and a suction pipe from top to bottom, the communication cavity and the suction pipe are respectively communicated with a filling assembly and a gas pump assembly, a baffle cavity is communicated with a baffle cavity in the communication cavity, a baffle is slidably arranged in the baffle cavity, a compression spring is fixedly arranged between the baffle and the inner wall of the baffle cavity, the inner wall on one side of the through cavity is further communicated with an elastic block cavity located below the suction pipe, an elastic block is slidably arranged in the elastic block cavity, a spring is fixedly arranged between the elastic block and the inner wall of the elastic block, a linkage rope is arranged between the elastic block and the baffle, and when the sliding assembly slides downwards to the suction pipe, gold can be performed on the upper side from the communication cavity through the filling assembly Belong to the filling work of powder, baffle closed baffle chamber when slip subassembly continues to the bullet piece chamber department downwards can extract the work to the metal powder of loading board upside through air pump assembly.

Preferably, the sliding block assembly comprises a sliding cavity and a sliding plate, the sliding cavity is located at the lower end in the bearing plate, the sliding plate is arranged in the sliding cavity in a sliding mode, the top end face of the sliding plate is arrayed and fixedly provided with a connecting rod, and one end, far away from the sliding plate, of the connecting rod extends into the through cavity and is fixedly provided with a sliding block.

Preferably, when the slider is located at the communication cavity, the slider closes the communication cavity.

Preferably, the slider offsets with the bullet piece when continuing down to bullet piece chamber department for the bullet piece slides into bullet piece intracavity and then makes the linkage rope not hard up, impels compression spring to drive the baffle and slide into the intercommunication intracavity and seal the intercommunication chamber.

Preferably, the bearing plate is internally and fixedly provided with a telescopic motor and a power shaft at the upper side of the sliding cavity, the outer circular surface of the power shaft is in threaded connection with a telescopic sleeve, and the telescopic sleeve extends into the sliding cavity and is fixedly connected with the upper end face of the sliding plate.

Preferably, the filling assembly comprises a sliding cavity and a piston, the sliding cavity is located in the bearing cavity, the piston is located in the sliding cavity, metal powder is filled in the sliding cavity, the piston is arranged in the sliding cavity in a sliding mode, and the communicating cavity is communicated with the sliding cavity through a hose.

Preferably, the sliding cavity is communicated with a closed cavity, the inner wall of the closed cavity is communicated with a control cavity, a closed plate is arranged in the control cavity in a sliding mode, a magnet is fixedly arranged at one end in the closed plate, an electromagnet capable of being magnetically connected with the magnet is fixedly arranged on the inner wall of one side, close to the magnet, of the control cavity, a pressure spring is fixedly arranged between the electromagnet and the closed plate, and the hose is arranged between the closed cavity and the sliding cavity.

Preferably, the air pump subassembly is including being located the chamber of keeping in of laser bed inner lower extreme, in the laser bed and be located the fixed air pump that is equipped with in chamber one side of keeping in, the straw with air pump and logical chamber intercommunication.

Preferably, a lifting assembly is arranged in the laser bed and on one side of the bearing plate, and the lifting assembly can drive the bearing plate to slide up and down in the bearing cavity.

Preferably, the lifting assembly comprises a lifting cavity communicated with the inner wall of the sliding cavity, a lifting motor is fixedly arranged in the laser bed and located on the lower side of the lifting cavity, a rotating shaft is dynamically connected to one end face of the lifting cavity, the rotating shaft extends into the lifting cavity and is in threaded connection with a threaded block, and one end of the outer circular face of the threaded block is fixedly connected with the outer circular face of the bearing plate.

The invention has the advantages of high filling speed and high filling efficiency, is beneficial to powder melting and sintering, avoids the defects of bubbles and the like between each printing layer, automatically performs vacuum suction on the metal powder on the printing platform, and has short time consumption and labor saving.

Drawings

A more complete understanding of the present invention, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:

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

fig. 2 is a schematic structural diagram of the slider mechanism in fig. 1.

FIG. 3 is a schematic cross-sectional view of FIG. 1;

FIG. 4 is an enlarged view of the point A in FIG. 3;

FIG. 5 is an enlarged view of the point B in FIG. 3;

FIG. 6 is a view of FIG. 3 in a state of being filled with metal powder;

FIG. 7 is a view showing the state of FIG. 3 in which the metal powder is extracted;

it is to be noted, however, that the appended drawings illustrate rather than limit the invention. It is noted that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.

Detailed Description

In order that the present disclosure may be more clearly and readily understood, reference will now be made in detail to the present disclosure as illustrated in the accompanying drawings.

As shown in fig. 1 to 7, the laser bed for 3D printing of this embodiment includes a laser bed 11, a bearing cavity 12 is provided in the laser bed 11, a bearing plate 30 is slidably provided in the bearing cavity 12, metal powder is filled between the top of the bearing plate 30 and the top of the laser bed 11, a through cavity 31 is provided in the bearing plate 30 in an upper end array, a slider assembly is provided in the through cavity 31 and between the lower ends of the bearing plate 30, a filling assembly is provided between the inner wall of one side of the through cavity 31 and the inner lower end of the laser bed 11, and the sliding assembly slides downward to perform metal powder filling work on the upper side of the bearing plate 30 through the filling assembly.

The sliding block assembly comprises a sliding cavity 28 which is located at the lower end in the bearing plate 30, a sliding plate 27 is arranged in the sliding cavity 28 in a sliding mode, a connecting rod 44 is arranged on the top end face array of the sliding plate 27 and fixedly arranged on the top end face array of the sliding plate 27, the number and the position of the connecting rod 44 are the same as those of the through cavity 31, one end, far away from the sliding plate 27, of the connecting rod 44 extends into the through cavity 31 and is fixedly provided with a sliding block 45, the sliding block 45 can slide in the through cavity 31, a telescopic motor 37 is fixedly arranged on the upper side of the sliding cavity 28 in the bearing plate 30 and is located, one end face, close to the sliding plate 27, of the telescopic motor 37 is in power connection with a power shaft 38, a telescopic sleeve 39 is in threaded connection with the outer circular face of the power shaft 38, one end, far away from the telescopic motor 37, of the telescopic sleeve 39 extends into the sliding cavity 28 and is fixedly connected with the upper end face of the sliding plate 27, and when the telescopic motor 37 rotates, the sliding plate 27 can be driven to slide in the sliding cavity 28. The packing subassembly is including being located the sliding chamber 19 that bears 12 downside settings in the chamber, sliding chamber 19 is filled up with metal powder, in the laser bed 11 and be located the fixed electric push rod 16 that is equipped with in sliding chamber 19 one side, it is equipped with piston 18 to slide in the sliding chamber 19, electric push rod 16 is close to 19 one end in the sliding chamber and piston 18 fixed connection, electric push rod 16 starts can drive piston 18 in sliding chamber 19 reciprocating motion, upper wall fixedly connected with connecting pipe 20 in the sliding chamber 19, connecting pipe 20 is linked together with the external equipment that has metal powder stored, lower wall just is located the fixed monitor 48 that is equipped with in connecting pipe 20 below in the sliding chamber 19, monitor 48 can monitor piston 18's position.

An air pump assembly is arranged on the inner wall of one side in the through cavity 31 and between the lower side of the filling assembly and the lower end of the laser bed 11, when the sliding assembly slides downwards continuously, metal powder on the upper side of the bearing plate 30 can be extracted through the air pump assembly, the air pump assembly comprises a temporary storage cavity 15 arranged on the lower end in the laser bed 11, an air pump 14 is fixedly arranged on one side of the temporary storage cavity 15 in the laser bed 11, suction pipes 49 are fixedly connected to the upper end and the lower end of the air pump 14, the suction pipe 49 on one side of the lower end of the air pump 14 is connected to the inner wall of the temporary storage cavity 15, the suction pipe 49 on the other side is connected to the inner wall of the through cavity 31, the air pump 14 can suck and temporarily store metal powder on the upper end of the laser bed 11 into the cavity 15 through the suction pipe 49, the inner wall of one side, far away from the electric push rod 16, in the temporary storage cavity 19 is communicated with the closed cavity 26, the inner wall of the closed cavity 26 is communicated with a control cavity 47, a closed plate 46 is arranged in the control cavity 47 in a sliding manner, and a magnet 25 is fixedly arranged at one end in the closed plate 46, an electromagnet 17 capable of being magnetically connected with the magnet 25 is fixedly arranged on the inner wall of one side, close to the magnet 25, of the control cavity 47, a pressure spring 24 is fixedly arranged between the electromagnet 17 and the closing plate 46, the pressure spring 24 is in a natural state, the electromagnet 17 is electrified to drive the pressure spring 24 to deform and stretch through magnetic force, the closing plate 46 is made to slide downwards to close the closing cavity 26, after the electromagnet 17 is powered off, the pressure spring 24 resets to drive the closing plate 46 to open the closing cavity 26, and the inner wall of one side, far away from the sliding cavity 19, of the closing cavity 26 is fixedly connected with a hose 13.

Lead to being close to the fixed inductor 32 that is equipped with of slide 27 one side inner wall in the chamber 31, inductor 32 can monitor the position of slider 45, lead to keeping away from inductor 32 one side inner wall intercommunication in the chamber 31 and have bullet piece chamber 34, slide in bullet piece chamber 34 and be equipped with bullet piece 36, bullet piece 36 is close to fixed spring 35 that is equipped with between 38 terminal surfaces of power shaft and the bullet piece chamber 34 inner wall, and bullet piece 36 is close to 38 terminal surface fixedly connected with linkage rope 33 of power shaft. Lead to and be close to flexible motor 37 one side inner wall intercommunication in the chamber 31 and have intercommunication chamber 43, intercommunication chamber 43 is close to flexible motor 37 one side inner wall and keeps away from the hose 13 fixed connection who seals chamber 26 one end, intercommunication chamber 43 in-connection has baffle chamber 42, it is equipped with baffle 41 to slide in the baffle chamber 42, baffle 41 is close to fixed being equipped with compression spring 40 between an terminal surface of bullet piece 36 and the baffle chamber 42 inner wall, compression spring 40 is in compression state, linkage rope 33 is kept away from bullet piece 36 one end and is close to a terminal surface fixed connection of bullet piece 36 with baffle 41.

Just be located loading board 30 one side in laser bed 11 and be equipped with lifting unit, lifting unit can drive loading board 30 and slide from top to bottom in bearing chamber 12, lifting unit includes and bears the lift chamber 22 of chamber 12 inner wall intercommunication, just be located the fixed elevator motor 23 that is equipped with of lift chamber 22 downside in laser bed 11, elevator motor 23 is close to lift chamber 22 one terminal surface power and is connected with pivot 29, pivot 29 extends to lift chamber 22 threaded connection has thread block 21, 21 outer disc one end of thread block 21 and the outer disc fixed connection of loading board 30, thread block 21 can drive loading board 30 and slide from top to bottom in bearing chamber 12.

When the laser melting device is used specifically, the laser bed 11 is installed in the selective laser melting 3D printer, the roller 50 is placed above the laser bed 11, metal powder is filled in the space on the upper side of the bearing plate 30, after a layer of model is printed by laser, the lifting motor 23 is started to drive the rotating shaft 29 to rotate, and further the threaded block 21 is driven to slide downwards for a short distance through threaded connection, the threaded block 21 drives the bearing plate 30 to descend for a short distance in the bearing cavity 12 through fixed connection, meanwhile, the telescopic motor 37 starts to rotate forward to drive the power shaft 38 to rotate, the power shaft 38 drives the telescopic sleeve 39 to slide downwards for a short distance through threaded connection, and further the sliding plate 27 is driven to slide downwards in the sliding cavity 28 through fixed connection, the sliding plate 27 slides to drive the connecting rod 44 to move through fixed connection, the connecting rod 44 drives the sliding block 45 to slide downwards in the through fixed connection in the through cavity 31 until the communicating cavity 43 is opened, at this moment, the sliding block 45 slides downwards to the upper side of the elastic block 36 to stop moving, at this moment, the electric push rod 16 is started to drive the piston 18 to continuously reciprocate in the sliding cavity 19, so that the metal powder in the sliding cavity 19 is slowly pressed into the closed cavity 26, then enters the communicating cavity 43 through the hose 13, enters the communicating cavity 31 through the communicating cavity 43 and is located on the upper side of the sliding block 45, the metal powder in the sliding block 45 is continuously increased, and then enters the upper end of the bearing plate 30 through the opening of the sliding block 45, and the space on the upper side of the bearing plate 30 is filled with the metal powder.

In the filling process, when the piston 18 slides to the monitor 48 and slides towards the resetting direction, the monitor 48 controls the electromagnet 17 to start, the electromagnet 17 is connected with the movable magnet 25 through magnetism and slides towards the direction of the closed cavity 26, and then the closed plate 46 is driven to slide downwards into the closed cavity 26 through fixed connection and seal the closed cavity 26, so that metal powder is prevented from being sucked into the sliding cavity 19 from the hose 13 when the piston 18 is reset, the electromagnet 17 is powered off to open the closed cavity 26, and the external metal powder is filled into the sliding cavity 19 through the connecting pipe 20, so that the metal powder is filled in the upper side space of the bearing plate 30 through continuous reciprocating movement of the piston 18.

After the filling is finished, the telescopic motor 37 rotates reversely, the slide block 45 is driven to slide upwards through the slide plate 27 until the slide block is reset, the roller 50 rolls from left to right in the laser bed 11, so that the next layer of laser printing can be carried out, after the printing is finished, the telescopic motor 37 starts to rotate forwards to drive the slide plate 27 to slide downwards, the slide block 45 is driven to slide downwards through the fixed connection until the slide block abuts against the elastic block 36, the elastic block 36 is driven to slide into the elastic block cavity 34, the linkage rope 33 is driven to loosen, the baffle plate 41 is driven to slide into the communication cavity 43 and seal the communication cavity 43 through the self elasticity of the compression spring 40, the slide block 45 covers the sensor 32, the air pump 14 is controlled by the sensor 32 to start, the metal powder on the upper side of the bearing plate 30 enters the through cavity 31 and is positioned on the upper side of the slide block 45, the air pump 14 pumps the powder in the slide block 45 into the temporary storage cavity 15 through the suction pipe 49 and temporarily stores the metal powder, after a period of time, after the extraction of the metal powder of loading board 30 upside is accomplished, the model that the manual work will be printed and is accomplished is taken off, and flexible motor 37 reverses, and slider 45 resets, and elevator motor 23 reverses, drives loading board 30 and resets, waits for next printing.

It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.