Solid 3D printing system for space component in-orbit manufacturing and repairing by using cold spraying and method

A 3D printing and cold spray technology, applied in the field of space 3D printing, can solve the problems of difficult repair of high-performance components, difficult to control molten pool behavior, and burning of alloying elements, so as to avoid throat wear, fine grains, and reduce burning. damage effect

A 3D printing and cold spray technology, applied in the field of space 3D printing, can solve the problems of difficult repair of high-performance components, difficult to control molten pool behavior, and burning of alloying elements, so as to avoid throat wear, fine grains, and reduce burning. damage effect

CN111962059AActive Publication Date: 2020-11-20NORTHWESTERN POLYTECHNICAL UNIV
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  • Solid 3D printing system for space component in-orbit manufacturing and repairing by using cold spraying and method
  • Solid 3D printing system for space component in-orbit manufacturing and repairing by using cold spraying and method
  • Solid 3D printing system for space component in-orbit manufacturing and repairing by using cold spraying and method

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Effect test

Embodiment

[0064] 3D printing pure Cu in space. Figure 5 Accelerated acceleration behavior of 5-20 μm Cu powder. Among them: the nozzle inlet diameter is 20mm, the throat diameter is 2.7mm, the outlet diameter is 5.7mm, the length of the straight section is 20mm, the length of the contraction section is 30mm, the length of the expansion section is 170mm, the angle of the powder feeding inlet is 45°, the confluence point is 20mm from the nozzle throat; the working gas It is hydrogen, the pressure is 3MPa, the temperature is 300K (room temperature); the powder feeding gas is also hydrogen, the pressure is 1.5MPa, the temperature is 300K (room temperature); the spraying powder is spherical Cu with a diameter of 5μm, 10μm, and 20μm, the spraying distance is 30mm, and the initial particle velocity 20m / s, initial temperature 300K. After being accelerated by the nozzle, the air velocity is up to 3200m / s, and there is an instantaneous drop at the exit position (at 0.17m), and then rises again....

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Abstract

The invention relates to a solid 3D printing system for space component in-orbit manufacturing and repairing by using cold spraying and a method. The data information of a temperature sensor, a pressure sensor, a distance sensor and a flowmeter are all transmitted to a computer terminal, the computer terminal gives a control instruction according to the three-dimensional data, a three-dimensionalmobile platform is controlled by a three-dimensional mobile platform control chip, a matrix or a substrate moves according to the design path, and meanwhile, a valve and a heater are controlled according to the data of the temperature sensor, the pressure sensor and the flowmeter, so as to adjust the process parameters. The system and the method have the advantages that in the space environment, the problem that a melting state 3D printing technology is difficult to effectively combine under the weight loss condition is solved. In the system and method, powder has extremely high speed and accurate direction, and the kinetic energy generated by means of acceleration of gas through a Laval nozzle makes metallics completely overcome the weight loss environment in the space.

Description

technical field [0001] The invention belongs to the field of space 3D printing technology, and relates to a solid-state 3D printing system and method for on-orbit manufacturing and repair of space components by cold spraying. After using computer modeling and slicing layer by layer, the preheated spray powder shrinks and expands Accelerated in the Laval nozzle to obtain kinetic energy, it is deposited on the substrate according to the specified path to realize the manufacture or repair of metal components. The powder particles are always in the solid state during the deposition process, which is completely different from the high-energy beam state 3D printing technology based on melting-solidification, so it is called solid-state 3D printing technology. Background technique [0002] With the development of human beings in space, the time in orbit and the altitude in orbit are gradually increasing. At present, the equipment required for space exploration and the parts requir...

Claims

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Application Information

Patent Timeline
20 Nov 2020
Publication
CN111962059A
IPC
C23C24/08; B33Y10/00; B33Y30/00
CPC
C23C24/085; B33Y10/00; B33Y30/00
Inventors
李文亚; 杨洋