Convection device and convection method

Abstract

The invention belongs to the technical field of additive manufacturing preparation, and in particular relates to a convection device and a convection method. In the convection device, since the other end of the first guide member is formed with a first notch, and the other end of the second guide member is formed with a second notch, the first notch is opposite to the second notch to form a convection channel, and the first guide Both the component and the second guiding component are connected on the installation substrate, and the installation substrate is located above the printing area. In this way, when the printing on the printing area reaches a certain area, the driving member drives the first guide member and the second guide member to move to correspond to the area being printed, so that the first notch and the second guide member on the first guide member The second gap corresponds to the area being printed, so that there is always a convective wind blowing over the area being printed, so that the sputtering and smoke can be well taken away, and the laser focus is convenient. In addition, the convection channels always correspond to the area being printed, which greatly reduces air volume requirements and reduces machine costs.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing preparation, and in particular relates to a convection device and a convection method. Background technique [0002] Factors such as the building platform of the additive manufacturing equipment, the temperature of the molding protection chamber, the oxygen concentration of the protection chamber, and the speed of the inert gas flowing over the powder surface will affect the process conversion and the formation of part defects. [0003] When printing, the laser focuses on the surface of the metal powder and passes quickly across it. At a certain moment, splashes and smoke will be generated near the molten pool, which will affect the laser focusing effect at the next moment, causing a large change in the temperature of the focus point. In addition, the sputtered particles are splashed on the surface of the processing area and mixed in the powder. These particles melt at higher tempe...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a convection device and a convection method in view of the high cost technical defect caused by the convection of the inert gas on the surface of the existing printing area.

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