A powder spreading device applied to laser additive manufacturing

Abstract

The invention discloses a powder spreading device applied to laser additive manufacturing. The device comprises a powder storage component, a selective area powder spreading component and an auxiliary moving component. When spreading powder, the powder storage component is firstly used to provide an appropriate amount of metal powder for the selected area powder spreading component, and then the selected area powder spreading component is driven by the auxiliary moving component to selectively lay metal powder at a specific position. With the application of this equipment, the shape and position of the powder bed can be flexibly adjusted according to the section section of the metal parts and the conformal cylinder, which greatly improves the powder raw material rate of the laser additive manufacturing technology combining synchronous feeding and preset powder coating. At the same time, the device can also be applied to conventional laser selective melting technology.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a powder spreading device applied to laser additive manufacturing. Background technique [0002] Due to a series of advantages such as high flexibility, excellent product performance, and wide material adaptability, laser additive manufacturing technology has become a research hotspot in the field of metal parts processing. [0003] According to different process characteristics, laser additive manufacturing technology can be divided into three types: synchronous feeding, preset powder coating, and combination of synchronous feeding and preset powder coating. Among them, the synchronous feeding laser additive manufacturing technology includes laser cladding deposition and laser wire feeding deposition. During the processing, the coaxial feeding nozzle is used to synchronously transport the metal powder / wire to the dynamic molten pool formed by laser bea...

AI Technical Summary

Problems solved by technology

However, the existing powder spreading devices can usually only lay powder beds with a fixed horizontal cross-sectional profile

In order to ensure that each layer of powder can be completely laid during the part forming process, it is necessary to use a powder spreading device whose effective powder spreading area can cover the maximum horizontal section of the conformal cylinder, which will undoubtedly lead to Excess powder is scattered to areas outside the conformal cylinder, resulting in waste of powder raw materials

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