Powder bed electron beam additive manufacturing equipment

Abstract

The invention discloses powder bed electron beam additive manufacturing equipment. The equipment comprises a forming cavity, wherein an electronic gun is arranged at the top of the forming cavity, a powder laying platform, a fixed heat insulation frame and a forming surrounding frame are arranged in the forming cavity, a supporting plate is arranged in the forming surrounding frame, a forming bottom plate is arranged on the supporting plate, and first heat preservation structures are arranged on four side faces of the forming surrounding frame and below the supporting plate, the first heat preservation structure comprises a heat preservation plate, the heat preservation plate is arranged on the outer side of a side face of the forming surrounding frame or below the supporting plate, and first heat preservation materials are further arranged in gaps formed between the heat preservation plate and the side face of the forming surrounding frame or the supporting plate. The equipment is advantaged in that the equipment greatly reduces heat transfer of high heat in the forming surrounding frame to a low-temperature area through modes of heat conduction, heat convection, heat radiation and the like, maintains the high-temperature environment in the forming surrounding frame, and effectively eliminates defects of powder blowing, infirm interlayer bonding, need of a post-heat-preservation process and the like.

Description

technical field [0001] The invention relates to the technical field of powder bed electron beam additive manufacturing equipment, in particular to a powder bed electron beam additive manufacturing equipment. Background technique [0002] Powder bed electron beam additive manufacturing equipment is currently one of the mainstream equipment in the field of 3D metal printing, which can print refractory metals and alloys with high melting points such as titanium, tungsten, molybdenum, tantalum, and niobium into metal parts. The existing powder bed electron beam additive manufacturing equipment includes a forming chamber with an electron gun on the top, a powder spreading platform inside, and a forming enclosure below the powder spreading platform. There is a supporting plate that can move up and down inside the forming enclosure, and the forming bottom plate is installed on the supporting plate. There is also a powder feeding assembly on the powder spreading platform, and the m...

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Problems solved by technology

[0006] The embodiment of the present invention provides a powder bed electron beam additive manufacturing equipment to solve the problem of powder blowing and forming in the powder bed electron beam additive manufacturing equipment in the prior art due to the rapid loss of heat in the high temperature area during the printing process. Unreliable bonding between layers of parts, affecting printing efficiency and other issues

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