Laser powder rapid sintering and powder spreading device

Abstract

The invention discloses a laser powder rapid sintering and powder spreading device which comprises a foundation mounting frame, a powder spreading guide device, a powder spreading guide device controlsystem, a first powder spreading cylinder, a first powder spreading cylinder control system, a forming cylinder, a forming cylinder control system, a second powder spreading cylinder, a second powderspreading cylinder control system, a powder spreading roller reciprocating traveling device, a powder spreading roller reciprocating traveling device control system, and a powder recovery cylinder system. By adoption of the laser powder rapid sintering and powder spreading device disclosed by the invention, the continuous powder spreading operation can be completed on a laser sintering machine, and meanwhile, fallen raw material powder can be recovered. Compared with the prior art, the laser powder rapid sintering and powder spreading device has the advantages that the positions of the powderspreading cylinders are symmetrically set, so that not only can the structural compactness of a powder spreading device be guaranteed, but also the idle stroke of the powder spreading roller reciprocating traveling device during a motion process can be eliminated, and then the working efficiency of a laser powder sintering machine can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of laser powder rapid prototyping, and relates to a laser powder rapid sintering powder spreading device, in particular to a powder spreading device which can efficiently complete the powder spreading process on a laser powder rapid sintering machine and simultaneously realize recovery of raw material powder. Background technique [0002] Laser powder rapid prototyping technology is a relatively mature 3D printing manufacturing technology, and it is an important research direction in the field of rapid prototyping. The laser powder rapid sintering forming process is to spread a layer of printing powder on the surface of the formed part through the powder spreading device, and sinter the powder material at the melting point temperature after scanning the laser spot of the laser printing head with a set temperature. When a layer of powder material is sintered, the molding cavity is lowered by one working unit,...

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Problems solved by technology

[0005] 1) The total amount of powder fed by the powder feeding mechanism is difficult to control, and the powder dropped during the working process cannot be disposed of, which will not only cause waste of powder raw materials, but also lead to poor forming quality of parts

[0006] 2) There are too many invalid strokes during the movement of the powder spreading mechanism. Due to the movement and vibration of the scraper, the density distribution of the powder in the direction perpendicular to the movement direction of the powder spreading mechanism is uneven, which not only leads to low work efficiency, but also causes powder in the Uneven distribution in the horizontal direction affects the effect of laser sintering

[0007] 3) The overall structure of the powder spreading mechanism is not compact enough, resulting in a waste of space

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