Synchronous powder spreading type metal laser 3D printing powder feeding device

A technology of 3D printing and powder feeding device, which is applied in the field of laser 3D printing, can solve problems such as the disturbance of molten pool liquid level and the influence of cladding layer structure, so as to improve the utilization rate of powder, improve the consistency and directionality of the structure, Eliminates the effects of shocks and disturbances

Active Publication Date: 2017-05-24
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Abstract
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Problems solved by technology

More importantly, under the impact of carrier gas and shielding gas, the liquid level of the molte

Method used

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  • Synchronous powder spreading type metal laser 3D printing powder feeding device
  • Synchronous powder spreading type metal laser 3D printing powder feeding device
  • Synchronous powder spreading type metal laser 3D printing powder feeding device

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[0021] The present invention will be described in further detail below in conjunction with the drawings:

[0022] The structure of the powder feeding device for synchronous powder spreading type metal laser 3D printing in this embodiment is as follows: figure 1 As shown, the powder storage bin 1, the powder feeding bin 2, the powder feeding belt 3, the powder spreading head 4, the main transmission gear 5, the slave transmission gear 6, the driving motor 7, the beam 18, the cladding head 19 and the housing 11.

[0023] In this embodiment, the metal powder 9 uses Inconel 625 superalloy powder, which is spherical and has a particle size of 40-100 μm. A sample with a size of 50mm×50mm×50mm is prepared by laser 3D printing. The scanning path adopts an "S" shape, the laser spot diameter is 3mm, the overlap rate is 50%, the scanning speed is 300mm / min, and the laser power is 1000W.

[0024] Such as figure 1 As shown, the metal powder 9 is loaded into the powder storage bin 1 from the powde...

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Abstract

A synchronous powder spreading type metal laser 3D printing powder feeding device comprises a powder storage bin (1), a powder feeding bin (2), a powder feeding belt (3), a powder spreading head (4), a driving transmission gear (5), a driven transmission gear (6), a driving motor (7), a cross beam (18), a cladding head (19) and a shell (11). The powder feeding bin is fixed to the cladding head through a rolling bearing and rotates freely. A transmission gear is installed on the upper portion of the powder feeding bin and meshes with the other transmission gear to form a transmission gear pair, and preset movement is achieved under driving of the motor. The powder storage bin stays still but keeps sliding relative to the powder feeding bin. Powder enters the powder feeding belt from a bottom outlet of the powder feeding bin, is fed to the powder spreading head under driving of a driving wheel and is evenly spread on a base plate under the action of gravity to form a powder layer. The powder spreading head and the shell are together fixed to the cladding head. The powder feeding bin and the cladding head move coordinately through procedure setting, the effect that the powder layer is always directly in front of a laser spot is ensured, and circulating water is adopted for cooling in the powder spreading head.

Description

technical field [0001] The invention relates to a powder feeding device and method for synchronous powder-spreading metal laser 3D printing, belonging to the technical field of laser 3D printing. Background technique [0002] At present, there are two main methods of powder supply in the process of metal laser cladding or laser 3D printing, namely powder spreading and synchronous powder feeding. The powder-spreading powder supply system spreads a thin layer of metal powder on the entire area of ​​the cavity by mechanical means, and the laser performs "selective melting" in the designated area, and most of the powder is not used; while the synchronous powder feeding type powder The supply system sends the metal powder to the laser spot through gas or gravity, and melts while feeding the powder. Most of the powder is blown away by the gas or bounced away from the matrix, and the utilization rate of the powder is very low. More importantly, under the impact of the carrier gas ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y30/00
CPCB22F3/003B33Y30/00B22F10/00B22F10/36B22F12/52B22F10/25B22F10/366B22F12/30Y02P10/25
Inventor 王德王文琴谢玉江陈新贵迟长泰张友亮
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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