阅读说明：本技术 一种用于增材制造成型样件的多功能粉末清理装置及方法 (Multifunctional powder cleaning device and method for additive manufacturing molding sample ) 是由 宋长辉 邹壮 刘林青 杨永强 王迪 于 2020-12-16 设计创作，主要内容包括：本发明公开了一种用于增材制造成型样件的多功能粉末清理装置及方法,装置包括多功能清粉头、气体导管、压力泵、粉末过滤装置以及粉末回收装置；所述多功能清粉头包括吸粉头以及吹气头,所述吹气头通过气体导管与压力泵连接,所述吸粉头通过气体导管与粉末过滤装置连接,所述粉末过滤装置通过气体导管分别与压力泵以及粉末回收装置连接。本发明改进了传统的吸粉头,将吸粉头和吹气头组合生成新的多功能清粉头,吸粉头吸入气体,吹气头吹出气体,并且设置了粉末过滤装置与粉末回收装置,实现了成型样件表面粉末的清理与回收利用。(The invention discloses a multifunctional powder cleaning device and a method for an additive manufacturing molding sample piece, wherein the device comprises a multifunctional powder cleaning head, a gas guide pipe, a pressure pump, a powder filtering device and a powder recovery device; the multifunctional powder cleaning head comprises a powder suction head and a blowing head, the blowing head is connected with a pressure pump through a gas guide pipe, the powder suction head is connected with a powder filtering device through a gas guide pipe, and the powder filtering device is respectively connected with the pressure pump and a powder recovery device through the gas guide pipe. The invention improves the traditional powder suction head, combines the powder suction head and the gas blowing head to generate a new multifunctional powder cleaning head, the powder suction head sucks gas, the gas blowing head blows gas, and the powder filtering device and the powder recovery device are arranged, thereby realizing the cleaning and the recovery of the powder on the surface of the molded sample piece.)

1. A multifunctional powder cleaning device for an additive manufacturing molding sample piece is characterized by comprising a multifunctional powder cleaning head, a gas guide pipe, a pressure pump, a powder filtering device and a powder recovery device;

the multifunctional powder cleaning head comprises a powder suction head and a powder blowing head, the powder blowing head is connected with the pressure pump through a gas guide pipe, the powder suction head is connected with the powder filtering device through a gas guide pipe, and the powder filtering device is respectively connected with the pressure pump and the powder recovery device through gas guide pipes;

multifunctional powder cleaning device during operation, the force pump produces kinetic energy, and the force pump blows out the air current and arrives the gas blow head along gas conduit, and gas blows out and blasts shaping appearance piece surface from the gas blow head, inhale the powder head and inhale the gas that carries the powder and follow gas conduit and get into powder filter equipment, powder filter equipment filtration gas, the powder of collection gets into powder recovery unit along gas conduit.

2. The multifunctional powder cleaning device for the additive manufacturing molding sample piece as claimed in claim 1, wherein the powder suction head is arranged in the middle of the multifunctional powder cleaning head and penetrates through the whole multifunctional powder cleaning head; the number of the blowing heads is two, and the two blowing heads are respectively arranged on two sides of the powder suction head.

3. The multifunctional powder cleaning device for the additive manufacturing molding sample piece as claimed in claim 1, wherein the pressure pump is provided with an access interface and an access interface, the access interface and the access interface are respectively connected with a gas conduit and are respectively connected with the powder filtering device and the blowing head through the gas conduit;

the powder filtering device is provided with an access interface and two access interfaces, the access interface is connected with a gas conduit and connected with a powder suction head through the gas conduit, and the two access interfaces are connected with the gas conduit and respectively connected with a pressure pump and a powder recovery device through the gas conduit.

4. The multifunctional powder cleaning device for the additive manufacturing molding sample piece as claimed in claim 1, wherein a gas conduit connected between the powder filtering device and the powder recovery device is provided with an on-off valve for controlling the opening and closing of the powder recovery device.

5. The multifunctional powder cleaning device for the additive manufacturing molding sample piece according to claim 1, wherein the powder filtering device comprises a filtering bin and a filtering screen.

6. The multifunctional powder cleaning device for the additive manufacturing molded samples according to claim 5, wherein the filter mesh size of the powder filter device is in the range of 50-80 microns.

7. The multifunctional powder cleaning device for the additive manufacturing molding sample piece as claimed in claim 1, wherein the multifunctional powder cleaning head is arranged in a closed molding chamber of the additive manufacturing equipment, and a pressure pump and a powder filtering device which are arranged outside the molding chamber are connected through a gas conduit.

8. The multifunctional powder cleaning method based on the multifunctional powder cleaning device of claim 1, characterized by comprising the steps of:

s1, the pressure pump starts to work, filtered gas in the powder filtering device is sucked, kinetic energy is provided, and the pumped gas reaches the blowing head along the gas guide pipe;

s2, blowing gas by the gas blowing head, blowing the gas to the surface of the molded sample piece, and sucking the gas carrying powder by the powder suction head and entering the powder filtering device along the gas guide pipe;

s3, enabling the gas carrying the powder to enter a filtering bin of a powder filtering device, filtering the powder by a filter screen, enabling the collected powder to enter a powder recovery device along a gas guide pipe, and enabling the gas filtered by the filtering bin to enter a pressure pump again along the gas guide pipe;

and S4, repeating the steps S1 to S3 until the powder on the surface of the molding sample is completely removed.

9. The multifunctional powder cleaning method as claimed in claim 8, wherein during powder cleaning, the powder suction pressure of the powder suction head and the blowing pressure of the blowing head are dynamically balanced.

10. The multifunctional powder cleaning method according to claim 8, wherein the multifunctional powder cleaning head is freely moved by manual operation during powder cleaning.

Technical Field

The invention belongs to the technical field of additive manufacturing, and particularly relates to a multifunctional powder cleaning device and method for an additive manufacturing molding sample.

Background

The selective laser melting molding technology is a relatively widely applied and mature additive manufacturing technology. The technology takes laser as a heat source, focuses laser beams on powder of a forming plane through the control of a precise optical scanning system, moves a laser focus at a high speed according to a preset path, enables the scanned powder on the forming plane to be rapidly melted and then rapidly cooled and solidified, and finally processes the three-dimensional solid structural part through a forming mode of scanning a section area layer by layer and overlapping layer by layer.

The selective laser melting and forming technology breaks through the limitation of the traditional machining technology on the appearance of parts in principle, so that the mode of mechanical design is greatly leaped, and the selective laser melting and forming technology can be quickly permeated into the fields of aerospace, medical treatment, automobile manufacturing and the like.

However, admittedly, there are still many unsolved problems in the selective laser melting molding technology. For example, powder is generally attached to the surface of a sample piece formed by additive manufacturing, the surface quality and the processing precision of the sample piece are affected, and how to rapidly and efficiently process the powder on the surface of the sample piece becomes a big problem. A general powder cleaning device only has a powder suction port, and the pressure unbalance of the powder suction position can be caused when the general powder cleaning device works in a closed forming cavity, so that the powder suction is difficult.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provide a multifunctional powder cleaning device and a multifunctional powder cleaning method for a material increase manufacturing molding sample piece.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multifunctional powder cleaning device for an additive manufacturing molding sample piece comprises a multifunctional powder cleaning head, a gas guide pipe, a pressure pump, a powder filtering device and a powder recovery device;

the multifunctional powder cleaning head comprises a powder suction head and a powder blowing head, the powder blowing head is connected with the pressure pump through a gas guide pipe, the powder suction head is connected with the powder filtering device through a gas guide pipe, and the powder filtering device is respectively connected with the pressure pump and the powder recovery device through gas guide pipes;

multifunctional powder cleaning device during operation, the force pump produces kinetic energy, and the force pump blows out the air current and arrives the gas blow head along gas conduit, and gas blows out and blasts shaping appearance piece surface from the gas blow head, inhale the powder head and inhale the gas that carries the powder and follow gas conduit and get into powder filter equipment, powder filter equipment filtration gas, the powder of collection gets into powder recovery unit along gas conduit.

Further, the powder suction head is arranged in the middle of the multifunctional powder cleaning head and penetrates through the whole multifunctional powder cleaning head; the number of the blowing heads is two, and the two blowing heads are respectively arranged on two sides of the powder suction head.

Further, the pressure pump is provided with an access interface and an access interface, and the access interface are respectively connected with a gas conduit and are respectively connected with the powder filtering device and the blowing head through the gas conduit;

the powder filtering device is provided with an access interface and two access interfaces, the access interface is connected with a gas conduit and connected with a powder suction head through the gas conduit, and the two access interfaces are connected with the gas conduit and respectively connected with a pressure pump and a powder recovery device through the gas conduit.

Further, a gas conduit connected between the powder filtering device and the powder recovery device is provided with a switch valve for controlling the opening and closing of the powder recovery device.

Further, the powder filtering device comprises a filtering bin and a filtering net.

Further, the filter mesh aperture range of the powder filter device is 50-80 microns.

Furthermore, the multifunctional powder cleaning head is arranged in a closed forming chamber of the additive manufacturing equipment and is connected with a pressure pump and a powder filtering device which are arranged outside the forming chamber through a gas conduit.

The invention also comprises a multifunctional powder cleaning method based on the provided multifunctional powder cleaning device, which comprises the following steps:

s1, the pressure pump starts to work, filtered gas in the powder filtering device is sucked, kinetic energy is provided, and the pumped gas reaches the blowing head along the gas guide pipe;

s2, blowing gas by the gas blowing head, blowing the gas to the surface of the molded sample piece, and sucking the gas carrying powder by the powder suction head and entering the powder filtering device along the gas guide pipe;

s3, enabling the gas carrying the powder to enter a filtering bin of a powder filtering device, filtering the powder by a filter screen, enabling the collected powder to enter a powder recovery device along a gas guide pipe, and enabling the gas filtered by the filtering bin to enter a pressure pump again along the gas guide pipe;

and S4, repeating the steps S1 to S3 until the powder on the surface of the molding sample is completely removed.

Furthermore, the powder suction pressure of the powder suction head and the blowing pressure of the blowing head are kept in dynamic balance.

Furthermore, in the powder cleaning process, the multifunctional powder cleaning head can move freely through manual operation.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the invention creatively designs a novel multifunctional powder cleaning head on the basis of the traditional additive manufacturing molding sample powder cleaning device, the multifunctional powder cleaning head comprises a powder suction head and a gas blowing head, the powder suction head sucks gas with powder, and the gas suction head blows out gas filtered to form powder, so that the cleaning of the powder on the surface of the molding sample is realized, and the powder suction process and the gas blowing process form pressure balance at the powder suction part on the surface of the molding sample.

2. The powder filtering device and the powder recovery device are arranged, so that the powder on the surface of the molded sample piece is ensured to be recycled.

Drawings

FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;

the reference numbers illustrate: 1-multifunctional powder cleaning head; 2-a gas conduit; 3-a forming chamber; 4-a powder filtration device; 5-switching the valve; 6-a powder recovery unit; 7-pressure pump.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Examples

As shown in fig. 1, the invention provides a multifunctional powder cleaning device for an additive manufacturing molding sample, which comprises a multifunctional powder cleaning head 1, a pressure pump 7, a powder filtering device 4, a powder recovery device 6 and a gas conduit 2; the multifunctional powder cleaning head comprises a powder suction head and a powder blowing head, the powder blowing head is connected with a pressure pump 7 through a gas guide pipe 2, the powder suction head is connected with a powder filtering device 4 through the gas guide pipe 2, and the powder filtering device 4 is respectively connected with the pressure pump 7 and a powder recovery device 6 through the gas guide pipe 2; the gas conduit 2 connected between the powder filtering device 4 and the powder recovering device 6 is provided with a switching valve 5 for controlling the opening and closing of the powder recovering device 6.

In this embodiment, as shown in fig. 1, the multifunctional powder cleaning device is disposed in the forming chamber 3 of the additive manufacturing device, and is used in cooperation with the additive manufacturing device.

In this embodiment, as shown in fig. 1, the cross section of the multifunctional powder cleaning head is inverted T-shaped, and the powder suction head is arranged in the middle of the multifunctional powder cleaning head and penetrates through the whole multifunctional powder cleaning head; the number of the blowing heads is two, and the two blowing heads are respectively arranged on two sides of the powder suction head; the powder suction head is used for sucking gas with powder to enable the gas to enter the gas guide pipe, and the gas blowing head is used for blowing out the gas purified by the powder filtering device.

In this embodiment, the pressure pump is provided with an access interface and an access interface, and the access interface are respectively connected with the gas conduit and are respectively connected with the powder filtering device and the blowing head through the gas conduit; the powder filtering device is provided with an access interface and two access interfaces, the access interface is connected with a gas conduit and connected with a powder suction head through the gas conduit, and the two access interfaces are connected with the gas conduit and respectively connected with a pressure pump and a powder recovery device through the gas conduit.

In this embodiment, the powder filtering device comprises a filtering bin and a filtering net, wherein the pore size of the filtering net is 50-80 microns;

based on the above embodiment, the invention further provides a multifunctional powder cleaning method for the additive manufacturing molding sample, taking metal powder cleaning on the surface of a metal workpiece as an example, the method comprises the following steps:

s1, the pressure pump starts to work, filtered gas in the powder filtering device is sucked, kinetic energy is provided, and the pumped gas reaches the blowing head along the gas guide pipe;

s2, blowing gas by the blowing head, blowing the gas to the surface of the metal part, sucking the gas carrying metal powder by the powder sucking head, and feeding the gas into the powder filtering device along the gas guide pipe;

s3, enabling the gas carrying the metal powder to enter a filtering bin of a powder filtering device, filtering the metal powder by a filtering net, enabling the collected metal powder to enter a powder recovery device along a gas guide pipe, and enabling the gas filtered by the filtering bin to enter a pressure pump again along the gas guide pipe;

and S4, repeating the steps S1 to S3 until the metal powder on the surface of the metal piece is completely removed.

In this embodiment, the metal powder on the surface of the metal part is spheroidized large-particle powder or large-particle oxidation spatter formed in the selective laser melting process, and the diameter of the spheroidized large-particle powder or large-particle oxidation spatter is between 0 and 1000 um. In the working process, the multifunctional powder cleaning head can move freely through manual operation; in the process of cleaning the powder, the pressure balance of the powder suction position on the surface of the metal workpiece needs to be ensured, namely the powder suction pressure of the powder suction head and the blowing pressure of the blowing head keep dynamic balance. For the condition that powder is adhered to the surface of a part, the air pressure cannot be increased to blow and recover the powder, so that the powder is prevented from entering the external working environment.

It should also be noted that in this specification, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.