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Laser three-dimensional fast forming and manufacturing method based on micro arc powder carrying

A technology of laser three-dimensional and manufacturing methods, which is applied in the direction of additive manufacturing, process efficiency improvement, and energy efficiency improvement. It can solve problems that have not yet entered large-scale industrial applications, unsatisfactory manufacturing accuracy, and insufficient research and development of processes and equipment. , to achieve the effect of excellent arc stability and straightness, small thermal deformation, and small amount of machining

Active Publication Date: 2016-08-10
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 3D rapid prototyping of metal components is applied to product development, but there are still problems such as high cost of use, low manufacturing efficiency, and unsatisfactory manufacturing accuracy.
The research and development of its technology and equipment is not yet sufficient, and has not yet entered large-scale industrial applications

Method used

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  • Laser three-dimensional fast forming and manufacturing method based on micro arc powder carrying

Examples

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Effect test

Embodiment 1

[0028] The substrate used in this example is a 304 stainless steel plate with a thickness of 4mm, and the powder material is austenitic stainless steel powder with a particle size of 200-300 mesh. The tungsten pole used is a cerium tungsten electrode, and the electrode connection method is that the cathode of the tungsten pole is connected to the negative pole of the power supply, and the substrate is connected to the positive pole of the power supply by the anode. The main arc current of the micro-beam plasma arc is 35A, the pulse laser peak power is 5.5kW, the pulse width is 5ms, and the defocus is 4mm. Adjust the laser emitting head 4 so that the angle between the laser beam and the vertical plane is 5°, and set the forward speed of the workbench to 12mm / s. The protective gas and working gas used in the micro-beam plasma arc and laser are both pure argon, and the flow rate of the protective gas is 15L / min, and the powder feeding rate of the powder feeder 6 is 20g / min. Cali...

Embodiment 2

[0030] The substrate used in this example is a 6061 aluminum alloy plate with a thickness of 4mm, and the powder material is AlSi-based aluminum alloy powder with a particle size of 200-300 mesh. The tungsten pole used is a cerium tungsten electrode, and the electrode connection method is that the cathode of the tungsten pole is connected to the negative pole of the power supply, and the substrate is connected to the positive pole of the power supply by the anode. The main arc current of the micro-beam plasma arc is 40A, the pulse laser peak power is 5.5kW, the pulse width is 4.5ms, and the defocus is 4.5mm. The angle between the laser beam and the vertical plane is 5°, and the exit direction of the micro-beam plasma arc is at an angle of 25° with the laser beam. Set the table forward speed to 10mm / s. The protective gas and working gas used in the micro-beam plasma arc and laser are all pure argon, and the protective gas flow rate is 20L / min, and the powder feeding rate is 15...

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Abstract

The invention discloses a laser three-dimensional fast forming and manufacturing method based on micro arc powder carrying. By means of the method, flow carrying and synchronous powder sending of powder are achieved by means of a micro-beam plasma arc, and main energy needed for forming a metal structure is provided by means of a pulse laser heat source. The powder sending precision of powder materials is improved by means of the good arc stability and stiffness of the micro-beam plasma arc; and by means of the characteristic that the energy function of the micro-beam plasma arc is concentrated is utilized, so that the melting rate and the deposition rate of the powder are increased, and the heat absorbing rate of the powder materials and a forming area on the energy of the laser heat source is increased. The main arc current of the micro-beam plasma arc in the method is 30 A-50 A, the pulse peak power of a pulse laser beam is 4 kW-10 kW, and three-dimensional fast forming and manufacturing of metal materials and the structure are achieved by adjusting the relative position relation between the laser beam and the powder carrying flow of the micro-beam plasma arc, the beam spot coinciding ratio and the output energy of the micro-beam plasma arc and the laser beam. The laser three-dimensional fast forming and manufacturing method has the beneficial effects of being high in forming efficiency, high in precision, little in deformation, high in technical adaptability and the like.

Description

technical field [0001] The invention relates to a laser three-dimensional rapid prototyping manufacturing method, which is suitable for realizing laser three-dimensional rapid prototyping and manufacturing of metal materials such as stainless steel, aluminum alloy and titanium alloy in the form of synchronous powder feeding. Background technique [0002] Three-dimensional rapid prototyping manufacturing (3D printing) technology is an advanced manufacturing technology integrated with information technology, new material technology and manufacturing technology. The leading technology for the development of individualized manufacturing models. After just over 20 years, this technology has achieved rapid development, and has broad application prospects in many fields such as aerospace, micro-nano manufacturing, and biomedical engineering. The technical basis of 3D rapid prototyping of metal components is welding / connection. In the past 20 years, two major breakthroughs have bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/32B22F12/43B22F10/25B22F10/36B22F10/31B22F12/44B22F12/53Y02P10/25
Inventor 罗怡韩静韬谢小健朱亮陈东郭继钊李正
Owner CHONGQING UNIV OF TECH
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