Additive manufacturing equipment for self-adaptive adjustment of wind field and its wind field control method

Abstract

An additive manufacturing equipment for adaptive adjustment of wind field and its wind field control method, wherein, the additive manufacturing equipment for adaptive adjustment of wind field includes a working cavity, a vibrating mirror system, a laser, a fan, and a control unit, and the working cavity The two opposite side walls are respectively provided with a suction port and a blowing port, so that the wind generated by the fan is blown into the working chamber through the blowing port and sucked away through the suction port. Judging whether it is necessary to control the rising or falling of the working plane according to the position of the highest point of the smoke or spatter, and when the rising or falling of the working plane is controlled, adjust the sintering parameters of the vibrating mirror system to make the sintering work of the scanning system stable. The present invention can ensure the sintering quality of the workpiece on the premise that the wind field cannot be changed, that is, meet the performance requirements of the workpiece; moreover, the wind speed of the present invention is fixed, compared with the prior art that ensures the scanning quality by increasing the wind speed, the present application Cost savings.

Description

technical field [0001] The present application relates to the technical field of additive manufacturing, in particular to an additive manufacturing equipment for adaptive adjustment of wind field and a wind field control method thereof. Background technique [0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. tooling mold, so the application range is very wide. Selective Laser Melting (SLM) is one of the additive manufacturing technologies that has developed rapidly in recent years. It uses powder materials as raw materials and uses laser to scan the cross-section of a three-dimensional entity layer by layer to complete prototype manufacturing. It is not affected by the shape of the part. The complexity is limited, no tooling is required, and the application range is wide. The basi...

AI Technical Summary

Problems solved by technology

However, when the equipment prints different metal powders, or adopts different scanning processes, etc., the height of the smoke and spatter (including large particles and sparks splashed by the laser sintering powder) generated by the sintering of the working plane is different. The wind speed is different at different heights, so that the dust and splashes at different heights correspond to different wind speeds, which may cause the dust and laser sintering powder produced by the sintering of certain materials or certain scanning processes due to the wind speed at different heights. It is too low to be blown away by the wind, causing the large particles of laser sintering powder to fall on the powder surface, which will affect the quality and performance of the next layer of workpiece sintering

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