A laser powder rapid sintering powder spreading device

Abstract

The invention discloses a laser powder rapid sintering powder spreading device, which comprises a basic installation frame, a powder spreading guide device and its control system, a first powder spreading cylinder and its control system, a forming cylinder and its control system, and a second powder spreading cylinder And its control system, powder spreading roller reciprocating device and its control system, recovery powder cylinder system. The device of the present invention can complete continuous powder spreading work on the laser sintering machine, and recover the dropped raw material powder at the same time. Compared with the prior art, the present invention symmetrically arranges the positions of the powder spreading cylinders, which not only ensures the compactness of the structure of the powder spreading device, but also eliminates the idle travel of the powder spreading roller reciprocating walking device during the movement process, greatly improving the laser powder The working efficiency of the sintering machine.

Description

technical field [0001] The invention belongs to the technical field of laser powder rapid prototyping, 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 process of laser powder rapid sintering is to spread a layer of printing powder on the surface of the formed part through the powder spreading device, and to 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, and t...

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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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