External Mobile Scanning System for Selective Laser Melting

Abstract

The invention discloses an external mobile scanning system for selective laser melting, which includes a forming chamber that is covered on a part processing platform and a laser vibrating mirror system that is placed outside the forming chamber and can move in parallel and synchronously for multi-station scanning. It also includes a dust-proof cover for dust-proofing the optical path formed by the laser galvanometer system. A gas positive pressure environment is formed in the dust-proof cover. The top of the molding chamber corresponds to each station and is provided with a hole for the optical path to pass through and for airtight protection. Lens: Not only can it realize the processing of large-area platform and high-efficiency scanning, but also realize the balance of reducing airtight space and anti-skid of dust in the optical path system.

Description

Technical field [0001] The invention relates to the field of selective laser sintering, in particular to an external mobile scanning system for selective laser melting. Background technique [0002] Selective laser melting technology refers to an additive manufacturing process that uses a laser galvanometer to scan metal powder layer by layer to directly form parts. It has the advantages of high forming efficiency, good quality, and can form multi-functional heterogeneous structures. The scanning area is limited and it is not suitable for processing large structural parts; and selective laser melting is a process in which high-power lasers directly act on metal powders to quickly melt and condense. During the molding process, strict control of oxygen content is required to prevent oxidation , Especially for more active metals, the oxygen content is too high and there is even a danger of burning or explosion; on the other hand, the laser system is extremely sensitive to dust, and ...

AI Technical Summary

Problems solved by technology

[0002] Selective laser melting technology refers to the additive manufacturing process that uses laser vibrating mirrors to scan metal powder layer by layer to directly form parts. It has the advantages of high molding efficiency, good quality, and the ability to form multifunctional heterogeneous structures. The scanning area is limited, and it is not suitable for processing large structural parts; and selective laser melting is a process method in which high-power laser directly acts on metal powder for fast melting and coagulation. During the forming process, the oxygen content needs to be strictly controlled to prevent oxidation. , especially for more active metals, the oxygen content is too high and there is even a danger of burning or explosion; on the other hand, the laser system is extremely sensitive to dust, which will cause great damage

In the prior art, there is no laser scanning system of laser sintering molding equipment that can comprehensively and effectively solve the above problems. Even if there is a laser vibrating mirror system placed outside the airtight cabin, laser projection and airtight protection can be achieved through fixed connections. The technical method of the purpose, but this method is limited by the small processing area of ​​the laser galvanometer, cannot form large parts, and the scope of application is limited

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