Fume treatment unit for selective laser melting

Abstract

The invention discloses a smoke dust treatment device for selective laser melting. The smoke dust treatment device comprises a smoke blowing and sucking device and a driving assembly used for driving the smoke blowing and sucking device to synchronously move to all stations along with a laser scanning unit; the smoke blowing and sucking device comprises a frame body, a gas convection unit for forming convection gas and a gas circulating system which is communicated with the gas convection unit to form circulation. The device further comprises a pipeline joint unit, wherein the smoke blowing and sucking device synchronously moves to the stations, and the pipeline joint unit is used for enabling the gas convection unit and the gas circulating system to be in pipeline connection at the stations; the smoke blowing and sucking device can synchronously move along with the laser scanning unit, effective treatment of the smoke is achieved, multi-station movement is achieved, and a smoke dust treatment full coverage of a large platform can be achieved; and the pipeline joint unit is arranged, when the smoke blowing and sucking device moves to the current station, a control system controls the pipeline joint unit to enable the gas convection unit and the gas circulating system to be in pipeline connection at the station, airflow conveying of the designated position is achieved, automation performance is high, and use is convenient.

Description

technical field [0001] The invention relates to the field of soot treatment in selective laser melting, in particular to a soot treatment device for selective laser melting. Background technique [0002] Selective laser melting is a process in which high-power laser directly acts on metal powder to make it dissolve and solidify quickly. The high-energy laser acts on the molten metal pool, and due to the effect of thermodynamics, part of the solution is excited, and it cools rapidly in the air to form black smoke. The smoke has three adverse effects: one is to pollute the environment of the molding chamber, the other is to cause diffuse reflection of the laser in the air in the molding chamber, which reduces the energy of the laser acting on the powder, and the third is if it is allowed to be mixed in the workpiece, It will reduce the density of the workpiece, resulting in a decline in quality. Effective treatment of smoke and dust is an essential part of the process. Sele...

AI Technical Summary

Problems solved by technology

Selective laser melting equipment for small working platforms solves this problem by arranging convective blowing and smoking mechanisms on both sides of the platform. However, this method cannot be used for large working platforms, because the small air flow cannot be exhausted over a long distance. Take away the smoke and dust, the atmospheric air flow will discharge the raw material powder on the platform

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