Optical processing nozzle and optical processing apparatus
AssigneeTechnology Research Association for Future Additive Manufacturing
InventorsGo Obara, Hiroshi Ohno
Life of this patent
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Abstract
Deterioration of a shaped object is prevented. There is provided an optical processing nozzle including an optical system in which a condensing point is adjusted to a processing point, a first set of fluid mixture discharge pipes that discharges, to the processing point, a material/purge gas fluid mixture obtained by mixing a purge gas in a powder processing material, and a second set of purge gas discharge pipes that discharges a purge gas having a purge function to the first set of fluid mixture discharge pipes, each of the fluid mixture discharge pipes of the first set being associated with each of the purge gas discharge pipes of the second set.
Claims9
An optical processing nozzle comprising:
- an optical system in which a condensing point is adjusted to a processing point;
- a set of pipes that receives a material/purge gas fluid mixture obtained by mixing a purge gas with a powder processing material, separates the material/purge gas fluid mixture into a separated powder processing material and separate purge gas, and discharges separated gases to the processing point;
- wherein first orifices of said set of pipes are arranged to be rotationally symmetrical with respect to a light beam path of said optical system, and
- wherein each pipe of said set of pipes includes an integrated discharge pipe structure,
- wherein the integrated discharge pipe structure includes an inner circular pipe and an outer circular pipe that are concentric and have a double structure,
- wherein the integrated discharge pipe structure includes:
- a first single pipe passage portion that supplies the material/purge gas fluid mixture, and
- a second single pipe passage portion having at least a portion that has an inner diameter that changes in order to gradually raise an internal pressure of the fluid mixture to a first pressure to perform preprocessing for separating the material/purge gas fluid mixture into the separated powder processing material and separated purge gas, maintain the first pressure for a predetermined time, and then gradually lower the first pressure,
- wherein the second single pipe passage portion is connected to the inner circular pipe and the outer circular pipe, the separated powder processing material is extracted and flows into the inner circular pipe, and the separated purge gas is extracted and flows into the outer circular pipe, and
- wherein the inner circular pipe and the outer circular pipe are arranged such that the separated purge gas shields the separated powder processing material.
Dependencies are inferred from the claim text.