Lower powder supply device of additive manufacturing equipment, powder supply method of lower powder supply device and additive manufacturing equipment

Abstract

The invention relates to a lower powder supply device of additive manufacturing equipment, a powder supply method of the lower powder supply device and the additive manufacturing equipment. The device comprises a first cylinder body which is vertically arranged and a second cylinder body which is transversely arranged on one side wall of the first cylinder body, wherein the first cylinder body and the second cylinder body are in communication and form an angle of 45-105 degrees, a powder inlet is formed in the top of the second cylinder body and used for being connected to an external powder supply mechanism, a second piston driving mechanism which is tightly attached to the inner wall of the second cylinder body and can move along the inner wall is arranged in the second cylinder body so that powder falling into the second cylinder body through the powder inlet can be pushed to the first cylinder body, and a first piston driving mechanism which is tightly attached to the inner wall of the first cylinder body and can ascend and descend along the inner wall is arranged in the first cylinder body so that powder in the first cylinder body can be lifted to a powder spreading area, and the powder spreading device can spread the powder to a working area. According to the lower powder supply device of the additive manufacturing equipment, the powder supply method and the additive manufacturing equipment, continuous powder supply can be effectively completed, powder supply is uniform, clamping stagnation is avoided, flying dust cannot be generated, precise instruments such as a galvanometer at the top of the equipment cannot be polluted, and high reliability and precision are achieved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional object manufacturing, in particular to a lower powder supply device of additive manufacturing equipment, a powder supply method thereof, and additive manufacturing equipment. Background technique [0002] As one of the additive manufacturing technologies, selective laser sintering technology, its basic working process is: the powder supply device sends a certain amount of powder to the worktable, and the powder spreading device spreads a layer of powder material on the molding cylinder to form On the upper surface of the part, the galvanometer system controls the laser to scan the solid part of the powder layer according to the cross-sectional profile of the layer, so that the powder is melted and bonded with the formed part below; The thickness of one layer is lowered, the powder spreading device moves to the powder supply device, the powder supply device sends a certain amount of powde...

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Problems solved by technology

[0005] Based on this, the present invention provides a lower powder supply device for additive manufacturing equipment, its powder supply method, and additive manufacturing equipment to solve the problem of uneven powder supply, sticking, and easy

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