CN218050330U

CN218050330U - Powder spreading scraper device for selective laser melting technology

Info

Publication number: CN218050330U
Application number: CN202122035237.1U
Authority: CN
Inventors: 肖静宇; 计霞; 刘慧渊; 薛智升; 郭广浩; 汪承杰; 陈志茹; 余佩鸿; 高桦; 沈于蓝
Original assignee: Falcontech Co ltd
Current assignee: Falcontech Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-12-16
Anticipated expiration: 2031-08-26

Abstract

The utility model discloses a election district laser melting technique is with spreading powder scraper device, including the confession powder storehouse and the closed scraper that set up from top to bottom, be provided with in the confession powder storehouse and store up the powder groove, the bottom that stores up the powder groove is provided with the powder mouth that falls, and the powder mouth that falls is provided with in the closed scraper spreads the powder groove by first apron closing cap, and the feed inlet that spreads the powder groove is by second apron closing cap, and first apron passes through the drive mechanism linkage with the second apron, and when closed scraper removes to supplying under the powder storehouse, first apron all is opened with the second apron for the powder that stores up in the powder groove falls into in spreading the powder groove. The powder spreading scraper device adopts a closed powder supply form, reduces the dust raising phenomenon in the process of printing and spreading powder, reduces the light path pollution condition, ensures that the light beam quality is more stable in the long-term printing process, obviously improves the printing success rate, depends on the scraper to move a power driving cover plate switch through the transmission of a pure mechanical structure, does not need an additional power source, and is convenient to maintain and lower in cost.

Description

Powder spreading scraper device for selective laser melting technology

Technical Field

The utility model relates to a selective laser melting technical field especially relates to a selective laser melting technique is with spreading powder scraper device.

Background

A selective laser melting technology is used as a 3D printing technology, the main working principle is that in an inert gas working chamber, a layer of powder with preset thickness is uniformly laid on a substrate of a forming chamber through a powder laying scraper system, a laser generator scans the corresponding position of a powder layer on the substrate through a light path system consisting of a collimating lens, a beam expanding lens and a scanning vibration lens according to a two-dimensional slice of a three-dimensional model in a control system on a computer, the powder layer is selectively melted to be solidified into a corresponding two-position entity, then the forming cylinder descends to the corresponding thickness of the powder layer, a powder laying scraper lays the powder in the powder cylinder on the substrate, and the operation is repeated until printing is completed.

The larger the part is, the longer the time required by printing, and for the upper powder feeding type selective laser melting equipment, in the long-term printing process, dust raised by a scraper during powder paving can affect laser under the action of a wind field, so that the energy when the dust reaches a sintering layer is weakened, and printing failure is caused. When printing light materials such as aluminum alloy, powder raise dust can adsorb even on the protective glass or in scraper motion belt device, and the cleaning equipment that must print need be suspended if necessary, can open the equipment and continue to print after finishing the clearance, causes the delivery of influence work piece such as stratification.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a election district laser melting technique is with spreading powder scraper device, solve the existing equipment and spread powder in-process scraper system and arouse the raise dust easily and pollute when spreading the powder and print the light path, influence laser energy, lead to printing the problem of failure.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a powder scraper device is spread with selective laser melting technique, it includes confession powder storehouse and the closed scraper that sets up from top to bottom, be provided with in the confession powder storehouse and store up the powder groove, the bottom that stores up the powder groove is provided with the powder mouth that falls, the powder mouth that falls is by first apron closing cap, be provided with in the closed scraper and spread the powder groove, the feed inlet of spreading the powder groove is by second apron closing cap, first apron passes through the drive mechanism linkage with the second apron, when closed scraper removes to supplying under the powder storehouse, first apron all opens with the second apron for the powder that stores up in the powder groove falls into spreads in the powder groove.

Furthermore, the transmission mechanism comprises a transmission rod which is rotatably arranged at the bottom of the powder supply bin, a first gear and a second gear which rotate coaxially are arranged on the transmission rod, a first rack which is meshed with the first gear is arranged on the lower surface of the first cover plate, a second rack which is meshed with the second gear is arranged on the upper surface of the second cover plate, and when the transmission rod rotates, the first cover plate and the second cover plate are driven to move, so that the powder falling port and the feeding port are opened.

Further, a third rack is arranged on the closed scraper, and when the closed scraper moves relative to the powder supply bin, the third rack is in meshing transmission with the first gear, so that the transmission rod is driven to rotate by the moving power of the closed scraper.

Furtherly, two first gears distribute in the both ends of transfer line, and the second gear is located the middle part of transfer line, seals and has seted up the groove of stepping down corresponding to the second gear on the scraper.

Further, when the first cover plate is completely opened, the powder falling port is exposed and is just positioned right above the feeding port.

Furthermore, a first groove cavity allowing the first cover plate to be accommodated is arranged in the powder supply bin, and a second groove cavity allowing the second cover plate to be accommodated is arranged in the closed scraper.

To sum up, the beneficial effects of the utility model are that, election district laser melting technique is compared with the current powder scraper system of shop's powder scraper device, has adopted the closed form that supplies powder, has reduced to print and has spread the raise dust phenomenon of powder in-process to the light path pollution condition has been reduced, makes its in-process light beam quality of printing for a long time more stable, and the success rate of printing is showing and is improving, through pure mechanical structure transmission in addition, relies on scraper itself to remove power drive apron switch, need not extra power supply, and convenient maintenance and cost are lower.

Drawings

Fig. 1 is a schematic external view of a powder spreading scraper device for selective laser melting technology provided by an embodiment of the present invention;

fig. 2 is an exploded view of a powder-spreading scraper device for selective laser melting technology provided by the embodiment of the present invention;

fig. 3 is a schematic view of a powder spreading scraper device for selective laser melting technology according to an embodiment of the present invention in a closed state;

fig. 4 is a schematic view of a powder spreading scraper device for selective laser melting technology in a powder falling state according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and can include, for example, fixed or removable connections, mechanical or electrical connections, indirect connections through intervening media, connections between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1 to 4, the preferred embodiment provides a powder spreading scraper device for selective laser melting technology, which includes a powder supplying bin 1 and a sealing scraper 2 arranged up and down.

Supply to be provided with in the powder storehouse 1 and store up powder groove 3, the bottom that stores up powder groove 3 is provided with powder mouth 4 that falls, powder mouth 4 that falls is by first apron 5 closing cap, be provided with in the closed scraper 2 and spread powder groove 6, the feed inlet of spreading powder groove 6 is by second apron 7 closing cap, first apron 5 links through drive mechanism with second apron 7, when closed scraper 2 removes to supplying under the powder storehouse 1, first apron 5 all opens with second apron 7 for the powder in the powder groove 3 that stores up falls into in spreading powder groove 6.

The transmission mechanism comprises a transmission rod 8 which is rotatably arranged at the bottom of the powder supply bin 1, a first gear 9 and a second gear 10 which coaxially rotate are arranged on the transmission rod 8, a first rack 11 meshed with the first gear 9 is arranged on the lower surface of the first cover plate 5, a second rack 12 meshed with the second gear 10 is arranged on the upper surface of the second cover plate 7, and when the transmission rod 8 rotates, the first cover plate 5 and the second cover plate 7 are driven to move, so that the powder falling port 4 and the feeding port are opened.

In particular, the sealing scraper 2 is provided with a third rack 13, and when the sealing scraper 2 moves relative to the powder supplying bin 1, the third rack 13 is in meshed transmission with the first gear 9, so that the driving rod 8 is driven to rotate by the moving power of the sealing scraper 2 without an additional power source.

Preferably, the two first gears 9 are distributed at two ends of the transmission rod 8, the second gear 10 is located in the middle of the transmission rod 8, and the closed scraper 2 is provided with a abdicating groove 14 corresponding to the second gear 10.

It should be noted that, when the first cover plate 5 is completely opened, the powder falling port 4 is exposed and just above the feed port, and there is no need to worry about leakage of dust when the first cover plate 5 is just opened.

The powder supplying bin 1 is provided with a first groove cavity 15 for accommodating the first cover plate 5, and the closed scraper 2 is provided with a second groove cavity 16 for accommodating the second cover plate 7.

The specific process comprises the following steps:

when the powder supply bin 1 is not contacted with the closed scraper 2, the first cover plate 5 closes the powder falling port 4, and the second cover plate 7 closes the feeding port, so that the powder of the whole system is kept closed in the movement process of the closed scraper 2, and the light path is not polluted by flying dust;

when the closed scraper 2 moves to contact with the powder supply bin 1, the first gear 9 is meshed with the third rack 13, and the closed scraper 2 moves to drive the first gear 9, the transmission rod 8 and the second gear 10 to rotate so as to drive the first cover plate 5 and the second cover plate 7 to move;

until the scraper moves to the first cover plate 5 and the second cover plate 7 are completely opened, powder in the powder supply bin 1 falls into the powder paving groove 6 of the closed scraper 2 from the powder falling port 4, and discharging is completed;

the sealing scraper 2 moves reversely, the first cover plate 5 and the second cover plate 7 are driven to the initial positions again to seal powder, the sealing scraper 2 moves to finish powder spreading action, and after the layer is printed by laser, the movement is repeated to finish the whole printing process.

In summary, the powder spreading scraper device for selective laser melting technology has the following advantages compared with the existing powder spreading scraper system:

1) The closed structure reduces the dust raising phenomenon in the printing and powder spreading process, reduces the pollution condition of a light path, and reduces the failure rate of printing;

2) Mechanical type structure, simple structure relies on scraper itself to remove power drive apron switch, need not extra power supply, and convenient maintenance and cost are lower.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a election district laser melting technique is with spreading powder scraper device, its characterized in that, including the confession powder storehouse and the closed scraper that set up from top to bottom, be provided with in the confession powder storehouse and store up the powder groove, the bottom that stores up the powder groove is provided with the powder mouth that falls, the powder mouth that falls is by first apron closing cap, be provided with in the closed scraper and spread the powder groove, the feed inlet that spreads the powder groove is by second apron closing cap, first apron with the second apron passes through the drive mechanism linkage, and when closed scraper removes under supplying the powder storehouse, first apron all opens with the second apron for the powder in the powder groove falls into and spreads in the powder groove.

2. A powder-laying scraper device for selective laser melting technology according to claim 1, characterized in that: the transmission mechanism comprises a transmission rod which is rotatably arranged at the bottom of the powder supply bin, a first gear and a second gear which rotate coaxially are arranged on the transmission rod, a first rack which is meshed with the first gear is arranged on the lower surface of the first cover plate, a second rack which is meshed with the second gear is arranged on the upper surface of the second cover plate, and when the transmission rod rotates, the first cover plate and the second cover plate are driven to move, so that a powder falling port and a feeding port are opened.

3. A powder spreading scraper device for selective laser melting technology according to claim 2, characterized in that: and a third rack is arranged on the closed scraper, and when the closed scraper moves relative to the powder supply bin, the third rack is in meshing transmission with the first gear, so that the transmission rod is driven to rotate by the moving power of the closed scraper.

4. A powder spreading scraper device for selective laser melting technology according to claim 2, characterized in that: two first gears distribute in the both ends of transfer line, the second gear is located the middle part of transfer line, it has seted up the groove of stepping down to correspond the second gear on the closed scraper.

5. The powder spreading scraper device for selective laser melting technology according to claim 1, wherein: when the first cover plate is completely opened, the powder falling port is exposed and is just positioned right above the feeding port.

6. The powder spreading scraper device for selective laser melting technology according to claim 1, wherein: the powder supply bin is internally provided with a first groove cavity allowing the first cover plate to be accommodated, and the closed scraper is internally provided with a second groove cavity allowing the second cover plate to be accommodated.