Adjustable laser coaxial powder feeding nozzle

Abstract

The invention discloses an adjustable coaxial laser nozzle for sending powder, comprising a laser head, a protection lens, a water-cooling sleeve for the protection lens and a column laser cavity arranged on the upper part, a coaxial conical laser cavity which is formed by the inner layer of a laser sleeve and arranged in the middle part, wherein a powder cavity, a secondary external protective cavity and an external water-cooling cavity are arranged on the lower part of the external part of the laser sleeve; the powder cavity is formed between the laser sleeve and a power cavity sleeve screwed together; the secondary external protective cavity is formed between the powder cavity and a protective air casing screwed together; the powder cavity and the protective sir casing are screwed together and adjustable between 1mm to 3mm; 4 to 6 power transmitting pipes and 4 to 6 air tubes are respectively positioned around the top parts of the cones of the powder cavity and the protective air cavity. The adjustable coaxial laser nozzle for sending powder has the advantages that the focus length of the focus lamp fit for the coaxial powder-sending nozzle is between 100mm to 300mm, which ensures convenient assembly and disassembly, even velocity, flexible adjustment of the powder converge diameter, convenient changeable lower coaxial conical parts (the powder cavity, the air casing and the water cavity).

Description

technical field [0001] The invention relates to a laser metal direct manufacturing nozzle, in particular to a laser coaxial powder feeding nozzle, which belongs to the field of laser processing and laser rapid manufacturing. Background technique [0002] Laser metal direct manufacturing technology combines rapid prototyping technology and laser cladding technology, and is an integration of the basic principles of rapid prototyping and the essence of laser processing technology. Based on the "discrete-stack" forming principle. Firstly, the 3D CAD model of the final functional part is generated in the computer; then the model is layered and sliced ​​according to a certain thickness, and the control forming system uses a laser coaxial powder feeding nozzle to scan the accumulated material layer by layer according to the contour trajectory; finally a 3D net shape entity is formed Component. [0003] At present, there are three main powder feeding methods in laser metal direct ...

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Problems solved by technology

[0005] In view of the fact that the laser metal direct manufacturing puts forward higher requirements for the coaxial powder feeding nozzle, the powder sent by the coaxial powder feeding nozzle is required to be more evenly distributed in the circumferential direction and has good convergence: in order to prolong the service life of the nozzle, it is required to The axial powder feeding nozzle has a good cooling effect; therefore, the purpose of the present inventi

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