CN115138875A

CN115138875A - Metal 3D printing apparatus follows wind field system

Info

Publication number: CN115138875A
Application number: CN202110341195.6A
Authority: CN
Inventors: 刘建业; 高文华; 徐卡里; 牛留辉; 胡高峰
Original assignee: Guangdong Hanbang3d Technology Co ltd
Current assignee: Guangdong Hanbang3d Technology Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-10-04

Abstract

The utility model provides a metal 3D printing apparatus follows wind field system, includes forming station, leg, the piece of blowing and receive the wind piece, the forming station is used for bearing and prints the finished piece, the leg covers the forming station, the forming station surrounds with the leg and forms the cabin, the cabin is used for acceping and prints the finished piece, the piece of blowing is located one side of leg, the piece of blowing includes first pars contractilis, first pars contractilis is equipped with the mouth of blowing, receive the wind piece and locate the leg and with the relative one side of the piece of blowing, receive the wind piece and include second pars contractilis, second pars contractilis is equipped with receives the wind mouth, first pars contractilis and the second pars contractilis can stretch out and draw the mouth of blowing and receive the wind mouth and be close to and print the finished piece, the piece of blowing blows to printing the finished piece and blow in order to take away the smoke and dust, receive the wind piece and absorb the smoke and dust through receiving. The metal 3D printing equipment follows the wind field system to realize that the wind field smoothly takes away particles in the cabin, and further improves the forming quality.

Description

Metal 3D printing apparatus follows wind field system

Technical Field

The application relates to the field of 3D printing, in particular to a metal 3D printing equipment following wind field system.

Background

At present, in the laser metal 3D printing process, metal powder can generate a large amount of smoke after absorbing laser energy, the smoke can be partially accumulated on the surface of the powder bed and even can reach a laser window at the top of a forming cabin, and when the situation happens, the interaction between the smoke and the laser can cause the refraction and absorption of a laser beam and consequently cause the reduction of the laser power reaching the surface of the powder bed and the distortion of the shape of the laser beam.

Therefore, an air field needs to be designed in the forming cabin, and the smoke and dust are smoothly taken away through the air field. The wind field is difficult to optimize, and the interference factors are many, such as the inconsistent quality of a printing area caused by powder blowing and powder dropping. Therefore, the quality of the wind field directly influences the quality of the product, and particularly, the wind field in a large-size forming range plays a decisive factor for the quality of the printed product. However, in the existing wind field in large-size equipment, smooth taking-off of particles can be realized in the equipment under the condition of small-range printing, and smooth taking-off of particles can hardly be realized in the large-range long-distance printing state, so that the problem of poor large-size forming quality is caused.

Disclosure of Invention

In view of the above, it is necessary to provide a metal 3D printing apparatus following wind field system capable of improving the molding quality.

An embodiment of the application provides a metal 3D printing apparatus follows wind field system, including forming table, leg, piece and receive the wind piece of blowing. The forming table is used for bearing a printing workpiece. The wall covers the forming table, the forming table and the wall surround to form a cabin, and the cabin is used for accommodating the printing part. The blowing piece is arranged on one side of the surrounding wall and comprises a first telescopic portion, and a blowing opening is formed in the first telescopic portion. The wind collecting piece is arranged on one side, opposite to the blowing piece, of the surrounding wall and comprises a second telescopic portion, and the second telescopic portion is provided with a wind collecting opening. The first telescopic part and the second telescopic part can be stretched and contracted to enable the air blowing port and the air collecting port to be close to the printing workpiece, the air blowing piece blows air to the printing workpiece through the air blowing port to take away smoke dust, and the air collecting piece absorbs the smoke dust through the air collecting port.

In some embodiments, the first telescopic portion and the second telescopic portion are telescopic along a first direction, and the first direction is a direction in which the blowing piece points to the wind-collecting piece, or a direction in which the wind-collecting piece points to the blowing piece.

In some embodiments, the air blowing opening and the air collecting opening are arranged oppositely along the first direction, so that the wind direction is the direction in which the air blowing piece points to the air collecting piece.

In some embodiments, the range of the telescopic distance of the first telescopic part and the second telescopic part is less than or equal to 1/2 of the length of the forming table.

In some embodiments, the blowing member includes a plurality of first telescopic portions, the wind-collecting member includes a plurality of second telescopic portions, and each first telescopic portion corresponds to one second telescopic portion and corresponds to a different portion of the printed article.

In some embodiments, the metal 3D printing apparatus following wind field system further comprises a powder laying pipe capable of sweeping the forming table after moving for laying powder on the forming table to form the printed article.

In some embodiments, the direction of movement of the powder laying tube is perpendicular to the first direction.

In some embodiments, the metal 3D printing apparatus following wind field system further includes a controller, the controller is in communication connection with the first telescopic portion and the second telescopic portion, and the controller is configured to control the first telescopic portion and the second telescopic portion to stretch and retract according to a size change of the printed object in a molding process of the printed object, so that the first telescopic portion and the second telescopic portion approach or depart from the printed object in real time according to the size change of the printed object.

In some embodiments, after the first expansion part and the second expansion part expand and contract, the air blowing opening and the air receiving opening can be flush with the inner surface of the surrounding wall, so as to maximize the use area of the forming table.

In some embodiments, the metal 3D printing apparatus following wind farm system further comprises a laser for emitting laser light to the powder of the forming table to solidify the powder to form the printed article.

Above-mentioned metal 3D printing apparatus follows wind field system and stretches out and draws back until mouthful and receive the wind mouth and be close to the printing piece through first pars contractilis and second pars contractilis, the rethread wind mouth blows to printing the piece and blows in order to take away the smoke and dust and receive the wind mouth and absorb the smoke and dust simultaneously, it is adjustable to have realized blowing mouthful and receive the distance between the wind mouth, thereby effectively reduce the required wind field scope of shaping platform actual printing, realized that the wind field takes away the granule in the cabin smoothly, and then improve the purpose of shaping quality.

Drawings

Fig. 1 is a schematic structural diagram of a following wind field system of a metal 3D printing apparatus in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the metal 3D printing apparatus in fig. 1 in another state of following the wind field system.

Fig. 3 is a schematic structural diagram of the metal 3D printing apparatus in fig. 1 in another state of following the wind field system.

Fig. 4 is a schematic structural diagram of a following wind field system of the metal 3D printing device in another embodiment.

Description of the main elements

Following wind field system 100 of metal 3D printing equipment

Printed article 200

Molding table 100a

Cabin 100b

Blower 10

First expansion part 11

Wind-collecting piece 20

Second expansion part 21

Powder laying pipe 30

Detailed Description

The technical solutions of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, in an embodiment of the present application, a metal 3D printing apparatus following wind field system 100 is provided, which includes a forming table 100a, a surrounding wall, a blowing member 10, and a wind receiving member 20. The molding table 100a is used to carry the printed article 200 at the time of printing. The enclosure walls are used to cover the forming station 100a, and the forming station 100a and the enclosure walls enclose to form a chamber 100b. Chamber 100b is used to provide containment during printing space to form the printed article 200. The blowing part 10 is provided at one side of the surrounding wall. The blowing member 10 includes a first expansion part 11. The first expansion part 11 is provided with an air outlet, and the air outlet communicates the air blower 10 with the chamber 100b. The blowing member 10 is used to blow air into the cabin 100b through the air blowing port. The wind-receiving member 20 is provided at a side of the surrounding wall opposite to the wind-blowing member 10. The wind scooper 20 includes a second telescopic portion 21. The second telescopic portion 21 has an air inlet, and the air inlet communicates the air receiving member 20 and the cabin 100b. The wind scooping member 20 is for sucking wind from the inside of the cabin 100b through the wind scooping opening. As an exemplary example, in an embodiment, the forming manner of the metal 3D printing device following the wind field system 100 is metal powder laser 3D printing, and in other embodiments, the metal 3D printing device following the wind field system 100 may also be 3D printing in other forming manners.

The first expansion part 11 can drive the air blowing opening to move in an expansion manner in a direction close to or far away from the air collecting piece 20. The second telescopic part 21 can drive the air receiving opening to move in a telescopic way towards the direction close to or far away from the blowing piece 10. After the first expansion part 11 and the second expansion part 21 are expanded and moved, the air blowing port and the air receiving port are respectively close to the forming table 100a from two sides to print the printed workpiece 200 in the forming process, after the air blowing port is close to the forming table 100a, the air blowing port blows air to the printed workpiece 200 to take away smoke generated in the printing process, the air blowing direction is towards the air receiving part 20, meanwhile, the air receiving port absorbs the smoke flying to the front, so that smoke particles cannot be gathered on the surfaces of the forming table 100a and the printed workpiece 200 and cannot reach a laser window at the top of the cabin 100b, the smoke is effectively removed, the smoke is prevented from being diffused in the cabin 100b and continuously threatening laser, and the forming quality of the printed workpiece 200 is improved.

In one embodiment, the first and second

extendable portions

11, 21 are only extendable and retractable in a first direction. The first direction is a direction in which the blowing part 10 points to the wind receiving part 20, or a direction in which the wind receiving part 20 points to the blowing part 10, so that the metal 3D printing apparatus is more simplified to follow the wind field system 100 and is convenient to control the movement of the first telescopic part 11 and the second telescopic part 21. In other embodiments, the first and second

extendable portions

11, 21 may be extendable and retractable in any direction and angle in space.

In an embodiment, the air blowing port and the air collecting port are arranged oppositely along the first direction, so that the formed air direction is the direction in which the air blowing piece 10 points to the air collecting piece 20, and further, the air flow direction in the cabin 100b is uniformly arranged from one side to the other side, the backflow phenomenon caused by reverse flow is eliminated, the air flow velocity is ensured, meanwhile, the smoke and dust are prevented from rising to other areas of the cabin 100b due to backflow, the efficient smoke and dust taking away is realized, and the forming quality of the printed piece 200 is improved.

Referring to fig. 1 and 2, the extension distance range of the first extension part 11 and the second extension part 21 is less than or equal to 1/2 of the length of the forming table 100 a. When the forming area required for printing the object 200 is only 1/2 of the total area of the forming table 100a, the first telescopic part 11 can be fully extended towards the wind-receiving member 20, and the second telescopic part 21 is fully retracted, as shown in fig. 1, so that the forming area of the forming table 100a is only 1/2 of the total area of the side close to the wind-receiving member 20; or as shown in fig. 2, the second telescopic part 21 is fully extended towards the blowing part 10, and the first telescopic part 11 is fully retracted, so that the forming area of the forming table 100a is only 1/2 of the total area of the side close to the wind-receiving part 20. In other embodiments, when the molding area required by the printing object 200 is larger than 1/2 of the total area of the molding table 100a, for example, 1/3, the first expansion part 11 and the second expansion part 21 may extend only a portion of the distance, so that the molding area of the molding table 100a is sufficient for molding the printing object 200. It is understood that the range of the stretching distance of the first stretching part 11 and the second stretching part 21 can be other values, such as 1/3, 1/4 of the length of the forming table 100a or the length of the whole forming table 100 a.

Referring to fig. 3, after the first expansion part 11 and the second expansion part 21 expand, the air blowing opening and the air collecting opening can be flush with the inner surface of the surrounding wall, so as to maximize the usable area of the forming table 100 a.

Referring to fig. 4, the blowing member 10 includes a plurality of first expansion portions 11. The wind-collecting member 20 includes a plurality of second expansion parts 21, and each of the first expansion parts 11 corresponds to one of the second expansion parts 21 along the first direction. Under the condition that the shape of the printed product 200 is irregular, every two first telescopic parts 11 and every two second telescopic parts 21 can relatively move in a telescopic manner and then correspond to different parts of the printed product 200, smoke generated by different parts of the printed product 200 can be adsorbed according to the shape of the printed product 200, a large number of invalid areas in the forming table 100a caused by the irregular shape of the printed product 200 are prevented, the distances between the first telescopic parts 11 and the second telescopic parts 21 on two sides of different parts of the printed product 200 are reduced, and the adsorption effect of the smoke is further improved.

The metal 3D printing apparatus following wind field system 100 further includes a controller. The controller is in communication connection with the plurality of first telescopic parts 11 and the plurality of second telescopic parts 21. The printed article 200 may change shape and size at different heights due to layer-by-layer printing during the 3D printing process. The controller is used for controlling the first telescopic part 11 and the second telescopic part 21 to stretch and retract according to the shape and size change of the printing workpiece 200 in the forming process of the printing workpiece 200, so that the first telescopic part 11 and the second telescopic part 21 are close to or far away from the corresponding part of the printing workpiece 200 in real time according to the size change of the printing workpiece 200, and the dust adsorption effect and the forming quality of the printing workpiece 200 are improved.

Referring to fig. 1 to 4, the metal 3D printing apparatus following wind field system 100 further includes a powder laying pipe 30. The powder laying pipe 30 can sweep the area of the forming table 100a after moving. The powder laying pipe 30 is used to lay powder layer by layer on the printed article 200 of the forming table 100a during the sweeping process to form the printed article 200.

In an embodiment, the moving direction of the powder laying pipe 30 is perpendicular to the first direction, so that the metal 3D printing device is more compact in structure following the wind field system 100.

The metal 3D printing apparatus following wind field system 100 further includes a laser disposed at the top of the chamber 100b for emitting laser light to the powder of the forming station 100a to solidify the powder to form the printed article 200.

Above-mentioned metal 3D printing apparatus follows wind field system 100 and stretches out and draws back until mouthful and receive the wind mouth and be close to printing piece 200 through first pars contractilis 11 and second pars contractilis 21, the rethread wind mouth blows to printing the piece and blows in order to take away the smoke and dust and receive the wind mouth and absorb the smoke and dust simultaneously, it is adjustable to have realized blowing mouthful and receive the distance between the wind mouth, thereby effectively reduce the required wind field scope of shaping platform 100a actual printing, the granule in the cabin 100b has been taken away smoothly in the wind field has been realized, and then the purpose of improvement shaping quality.

In addition, those skilled in the art should recognize that the foregoing embodiments are illustrative only, and not limiting, and that appropriate changes and modifications to the foregoing embodiments may be made within the spirit and scope of the present disclosure.

Claims

1. The utility model provides a metal 3D printing apparatus follows wind field system which characterized in that includes:

the forming table is used for bearing a printing workpiece;

the peripheral wall covers the forming table, the forming table and the peripheral wall surround to form a cabin, and the cabin is used for accommodating the printing workpiece;

the blowing piece is arranged on one side of the surrounding wall and comprises a first telescopic part, and a blowing port is formed in the first telescopic part;

the air collecting piece is arranged on one side, opposite to the blowing piece, of the surrounding wall and comprises a second telescopic part, and the second telescopic part is provided with an air collecting port;

the first expansion part and the second expansion part can expand and contract to enable the air blowing port and the air collecting port to be close to the printing workpiece.

2. The metal 3D printing apparatus following wind field system according to claim 1, wherein the first telescopic portion and the second telescopic portion are telescopic in a first direction, and the first direction is a direction in which the blowing member points to the wind scooping member, or a direction in which the wind scooping member points to the blowing member.

3. The metal 3D printing device following wind field system according to claim 2, wherein the blowing port and the wind receiving port are oppositely arranged in the first direction, so that a wind direction is a direction in which the blowing member points to the wind receiving member.

4. The metal 3D printing apparatus following wind field system according to claim 1, wherein the range of the telescopic distance of each of the first telescopic part and the second telescopic part is less than or equal to 1/2 of the length of the forming table.

5. The metal 3D printing device following wind field system according to claim 1, wherein there are a plurality of the first telescopic parts, a plurality of the second telescopic parts, and a plurality of the first telescopic parts and a plurality of the second telescopic parts correspond to each other one by one and to different portions of the printed article.

6. The metal 3D printing apparatus following wind field system according to claim 2, further comprising a powder laying pipe that lays powder on the forming table by moving to form the printed article.

7. The metal 3D printing apparatus following wind field system according to claim 6, wherein a moving direction of the powder laying pipe is perpendicular to the first direction.

8. The metal 3D printing device following wind field system according to claim 1, further comprising a controller, wherein the controller controls the telescopic lengths of the first telescopic part and the second telescopic part according to the size change or the position change of a printing area of the printed object in the forming process of the printed object.

9. The metal 3D printing device following wind farm system according to claim 1, the first telescopic part and the second telescopic part can enable the air blowing opening and the air collecting opening to be flush with the inner surface of the surrounding wall after being stretched.

10. The metal 3D printing device following wind farm system according to claim 1, wherein the metal 3D printing device following wind farm system further comprises a laser for emitting laser light to solidify the powder to form the printed article.