Carrier gas powder mixing type coaxial powder feeding nozzle for additive manufacturing
A technology of additive manufacturing and coaxial powder feeding, which is applied in the directions of additive manufacturing, additive processing, and process efficiency improvement. Effect
Pending Publication Date: 2021-12-31
CHONGQING UNIV OF TECH
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Abstract
The invention discloses a carrier gas powder mixing type coaxial powder feeding nozzle for additive manufacturing. The carrier gas powder mixing type coaxial powder feeding nozzle comprises a nozzle body, and the nozzle body comprises a conversion connector, a nozzle base cylinder, a flow guide sleeve, an inner nozzle body and an outer nozzle body; the lower end of the conversion connector is connected with the nozzle base cylinder, and the lower end of the nozzle base cylinder is connected with the outer nozzle body; the flow guide sleeve is in an inverted cone shape and installed in the nozzle base cylinder, and a powder mixing flow guide cavity is formed by enclosing the outer side wall of the flow guide sleeve and the inner side wall of the nozzle base cylinder; the inner nozzle body is located in the outer nozzle body, a powder outlet channel is formed between the inner nozzle body and the outer nozzle body, the upper end of the inner nozzle body is in threaded connection with the small-diameter end of the flow guide sleeve, and the radial size of the powder mixing flow guide cavity is larger than the width of the powder outlet channel; and a main powder feeding port and a doped powder feeding port are formed in the lower part of the nozzle base cylinder. The powder gathering state and the relative positions of light spots and powder spots can be correspondingly adjusted when the laser focusing state changes, superfine doped powder is synchronously doped for main powder in the powder conveying process, and powder aggregates are avoided.
Application Domain
Additive manufacturing apparatusIncreasing energy efficiency
Technology Topic
Structural engineeringManufacturing engineering +4
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