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A coaxial powder feeding laser 3D printing laser cladding head

A 3D printing and laser cladding technology, applied in metal material coating process, coating, additive processing, etc., can solve the problem of increasing process complexity, affecting the performance of laser 3D printing and cladding layer, poor powder uniformity, etc. problem, to achieve the effect of ensuring uniformity

Active Publication Date: 2020-09-01
江苏峰钛激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coaxial powder feeding is a powder feeding method often used in laser cladding and laser 3D printing. It can transport metal or ceramic powder with the same composition to the surface of the workpiece through the processing head. When the powder is composed of two or more powders, It is necessary to use a powder mixing device to pre-mix the powder, which increases the complexity of the process. When the particle size and density of the mixed powders differ greatly, the uniformity of the powder after mixing is poor, which will affect laser 3D printing and cladding. layer performance

Method used

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  • A coaxial powder feeding laser 3D printing laser cladding head
  • A coaxial powder feeding laser 3D printing laser cladding head
  • A coaxial powder feeding laser 3D printing laser cladding head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Cladding a layer of Al with a thickness of 0.5mm on the surface of 45 steel 2 o 3 / TiO 2 Ceramic coating, using a 3000 watt continuous fiber laser, the diameter of the laser spot after focusing is 3mm, the powder delivered by the powder feeding hole 1 and the powder feeding hole 3 is Al with a particle size of 50 mesh 2 o 3 Powder, powder feeding speed is 2cm 3 / s, the powder conveyed by the powder feeding hole 2 and the powder feeding hole 4 is TiO with a particle size of 200 mesh 2 , the powder feeding speed is 0.8cm 3 / s, the carrier gas pressure of the powder is 0.4MPa, and the rotating speed of the shell is 200r / min. After laser cladding, after testing, Al with a volume ratio of 5:2 and uniform components was obtained on the surface of 45 steel. 2 o 3 / TiO 2 Composite ceramic coating.

Embodiment 2

[0020] On the surface of 45 steel, the laser 3D printing functional gradient composite material is used. The lower layer is Mo2FeB2, and gradually transitions to the WC reinforced Mo2FeB2 composite material with a volume content of 25% on the surface layer, with a thickness of 3mm. A 100-watt continuous fiber laser is used. Focused The diameter of the laser spot is 0.1mm. The powder conveyed by powder feeding hole 1 and powder feeding hole 3 is Mo2FeB2 powder with a particle size of 50 mesh, and the powder conveyed by powder feeding hole 2 and powder feeding hole 4 is WC with a particle size of 200 mesh. 0.4MPa, using layer-by-layer printing (the powder feeding speed of powder feeding hole 1 and powder feeding hole 3 of the first layer is 0.4cm 3 / min, the powder feeding speed of powder feeding hole 2 and powder feeding hole 4 is 0cm 3 / min; the powder feeding speed of powder feeding hole 1 and powder feeding hole 3 of the second layer is 0.39cm 3 / min, the powder feeding spe...

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Abstract

The invention provides a coaxial powder feeding laser 3D printing laser cladding head. The coaxial powder feeding laser 3D printing laser cladding head consists of an electric motor, a transmission system, an outer shell, a bearing, a sealing ring and an inner shell; the inner ring of the bearing is fixed on the outer surface of the inner shell, the inner circular face of the outer shell is fixedin the outer ring of the bearing, and the axes of the outer shell, the bearing, and the inner shell is coincided with a laser beam after focusing; and the outer shell is connected with the electric motor through the transmission system, a first powder feeding hole, a second powder feeding hole, a third powder feeding hole and a fourth powder feeding hole are formed in the end face of the inner shell, the powder enters a cavity between the outer shell and the inner shell through the first powder feeding hole, the second powder feeding hole, the third powder feeding hole and the fourth powder feeding hole under the driving of carrier gas, a powder mixing blade is mounted on the inner circular face of the outer shell, the outer shell rotates in the anti-clockwise direction, and the powder isejected through the lower ends of the outer shell and the inner shell under the function of the carrier gas and reaches the surface of a workpiece after irradiation of the laser beam. According to thecoaxial powder feeding laser 3D printing laser cladding head, the heterogeneous powder can be mixed evenly through the counterclockwise rotation of the outer shell, and the coaxial powder feeding laser 3D printing laser cladding head can be used for a coaxial powder feeding laser cladding system and a laser 3D printing system.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a coaxial powder feeding laser 3D printing laser cladding head technology. Background technique [0002] Laser cladding can obtain a protective layer with specific properties on the surface of metal workpieces, which can greatly improve the wear resistance, corrosion resistance, and hydrogen embrittlement resistance of the workpiece, and can greatly improve the service life of key components. Laser 3D printing is often used to obtain metal parts with complex structures. Coaxial powder feeding is a powder feeding method often used in laser cladding and laser 3D printing. It can transport metal or ceramic powder with the same composition to the surface of the workpiece through the processing head. When the powder is composed of two or more powders, It is necessary to use a powder mixing device to pre-mix the powder, which increases the complexity of the process. When the particle s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B33Y30/00
CPCB33Y30/00C23C24/10
Inventor 杭可望裴利峰蒋飞益冯强戴峰泽
Owner 江苏峰钛激光科技有限公司