Continuous stepless variable powder supply device for additive manufacturing

Abstract

The invention relates to a continuous stepless variable powder supply device for additive manufacturing. The continuous stepless variable powder supply device comprises a forming cabin, a powder supply device, a continuous powder conveying pipeline and a stepless variable powder outlet, wherein the forming cabin is used as a forming cabin for additive manufacturing; the forming cabin comprises a working plane, a powder spreading device, a forming area, at least one powder inlet and at least one powder recovery port; and the forming area and the powder recovery port are arranged on the workingplane. The continuous stepless variable powder supply device for additive manufacturing has the advantages of simple structure, flexible arrangement, stepless variable supply and continuous production.

Description

technical field [0001] The present invention relates to the technical field of additive manufacturing, more specifically, it relates to a continuous stepless variable powder supply device for additive manufacturing. Background technique [0002] The continuous stepless variable powder supply device for additive manufacturing in the prior art usually includes two ways of feeding powder downward and powder upward. Wherein, the powder feeding at the bottom is usually the powder supply cylinder, the left side of which is the forming cylinder, the forming cylinder is provided with a forming piston, and the forming piston moves up and down in the vertical direction during the working process; the right side of the forming cylinder The powder supply cylinder has a powder supply piston inside, and the powder supply piston moves up and down in the vertical direction. Each time a layer of sintering is completed during the forming process, the forming piston moves down a preset distan...

AI Technical Summary

Problems solved by technology

Although this powder feeding method reduces the volume of the forming chamber to a certain extent and has the advantage of being able to add raw material powder at any time, its disadvantage is that the powder has poor fluidity and is easy to arch, so that the powder in the groove is filled in the axial direction Uneven or missing distribution on the upper surface, resulting in unstable powder spreading effect, which in turn affects the printing quality of formed parts

In addition, when the forming area of ​​the printed layer of the formed part changes, the powder supply needs to be adjusted. However, in this way, the powder supply can only be changed in units of the volume of a single groove, resulting in low powder utilization and increased production. consume

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