Additive manufacturing powder falling device and method

Abstract

The invention discloses a powder dropping device and method for additive manufacturing. The device includes: a motor, a magnetic fluid sealing device, an installation cavity, a lever, a dial, two bearing fixing blocks, two rotating bearings, and a powder supply tank and a powder supply roller; the motor is movably connected to the magnetic fluid sealing device through a coupling, the end of the rotating shaft of the magnetic fluid sealing device is inserted into the installation cavity, and the end of the rotating shaft of the motor is connected to the One end of the powder supply roller is fixedly connected with a dial, and the two dials are connected by a lever. The powder supply roller is accommodated in the powder supply tank, and its two ends are movably connected to the two On the two bearing fixing blocks, the two bearing fixing blocks are provided with rotating bearings. Using the blocking function of the powder separation block, the problems of powder supply roller and powder supply trough being locked and powder leakage are solved, and at the same time, the rotation speed of the motor is controlled to control the amount of powder moving from the upper part of the powder supply trough to the lower part of the powder supply trough to achieve quantitative Powder effect.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing equipment, in particular to a powder dropping device and method for additive manufacturing. Background technique [0002] Additive manufacturing technology refers to a scientific and technological system that is based on the principle of discrete accumulation and is driven by the three-dimensional data of the part to directly manufacture parts. It is based on the 3D (3Dimensions) design model, and the material is fixed point by layer by controlling the high-energy beam according to the demand. Build up to form solid parts. [0003] There are many forms of quantitative powder supply for additive manufacturing. Among them, selective laser melting (SLM, Selective lasermelting) is commonly used based on powder spreading and powder feeding. The method of powder spreading and powder feeding is to quantitatively mold the powder in the powder storage tank located on one side of the forming...

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Problems solved by technology

[0009] In order to overcome the deficiencies of related products in the prior art, the present invention proposes a powder falling device and method for additive manufacturing, which solves the problems that the existing powder falling device is easy to jam powder and the oxygen content inside the powder is high

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