Powder feeding system for large-size electron beam 3d printing
A 3D printing and electron beam technology, applied in the field of additive manufacturing, can solve the problems of inability to achieve uniform powder feeding, occupy a large space, and low powder feeding efficiency, and achieve continuous and efficient production, increase quality, and improve powder feeding efficiency. Effect
Active Publication Date: 2021-02-19
NAT INST CORP OF ADDITIVE MFG XIAN
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problems of low powder feeding efficiency, inability to achieve uniform powder feeding, large space occupation, powder overflow, and powder waste in the existing powder feeding system, and to provide a powder feeding system for large-scale electron beam 3D printing. system
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[0043] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0044] The present invention provides a powder feeding system for large-size electron beam 3D printing, which is suitable for large-size electron beam selective melting (EBSM) equipment. Large-size EBSM equipment requires the requirement of avoiding powder spreading waste and improving powder spreading efficiency, and at the same time The ability to respond quickly to powder feed and powder feed uniformity is required. Based on this, the present invention realizes a dynamic powder feeding system with adjustable powder feeding volume by designing the powder supply box, powder flow rate, powder falling pipeline, and powder feeding uniformity, and solves the waste and low efficiency of large-sized SEBM powder feeding problem, thereby improving the processing efficiency. The powder feeding system cooperates with the rotary...
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The invention provides a powder feeding system for large-size electron beam 3D printing. The problems that the prior powder feeding system is low in efficiency, cannot achieve uniform powder feeding,and occupies a large space and powder overflows are solved. The powder feeding system comprises a powder feeding device and a powder spreading device. The powder feeding device comprises a powder feeding shell, powder wheel assemblies and driving assemblies. A powder feeding cavity is formed in the powder feeding shell, powder inlets are formed in the top, and powder outlet channels are formed inthe bottom. Each powder wheel assembly comprises a transmission shaft, a powder feeding wheel and two side leakage prevention wheels. The driving assemblies are used for driving the transmission shafts to rotate. The powder spreading device is arranged below the powder feeding device and comprises a powder falling box and a powder scraping assembly. A plurality of powder falling cavities are formed in the powder falling box, and a plurality of scattering plates are arranged in the powder falling cavities. A plurality of powder inlets communicated with the powder falling cavities are formed inthe top of the powder falling box, and the powder inlets are communicated with the powder outlet channels. A plurality of powder outlets communicated with the powder falling cavities are formed in thebottom of the powder falling box. The powder scraping assembly comprises a soft scraping plate, a hard scraping plate and a compaction plate.
Description
technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a powder feeding system for large-size electron beam 3D printing. Background technique [0002] Electron beam selective melting (EBSM) metal additive manufacturing technology uses electron beams as an energy source to manufacture solid parts by melting metal powder layer by layer in a high vacuum environment. Due to the high power of the electron beam and the high energy absorption rate of the material to the electron beam, the parts have the characteristics of high density, low oxygen content, low thermal stress, not easy to deform and crack, high printing efficiency, and high material utilization rate. Aerospace and other fields have been widely used. [0003] The process of electron beam selective melting (EBSM) metal additive manufacturing is as follows: first, a layer of powder is spread on the surface of the powder bed, and the electron beam preheats the p...
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IPC IPC(8): B22F12/50B22F12/37B22F12/41B33Y30/00
CPCB33Y30/00
Inventor 王志翔卢秉恒王红宇凌楷王磊
Owner NAT INST CORP OF ADDITIVE MFG XIAN