Processing nozzle, processing head, and optical machining apparatus

Patent metadata

Field	Value
Publication number	US-10112261-B2
Application number	US-201515119816-A
Country	US
Kind code	B2
Filing date	Nov 11, 2015
Priority date	Nov 11, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A powder convergence improves without varying the flow velocity and powder density of a powder flow. A processing nozzle includes an inner cone including a beam path that passes light from a light source, an outer cone arranged outside the inner cone, a fluid ejection channel formed by a gap between the inner cone and the outer cone, and including an ejection port that opens toward a process surface, and a fluid guide channel having a flow inlet for a fluid. The fluid guide channel guides the fluid toward the fluid ejection channel in a direction away from the beam path.

First claim

The invention claimed is:

1. A processing nozzle comprising:
an inner cone including a beam path that passes light from a light source;
an outer cone arranged outside said inner cone;
a fluid ejection channel formed by a gap between said inner cone and said outer cone, and including an ejection port that opens toward a process surface; and
a fluid guide channel having at least one introduction port for a fluid,
wherein said fluid guide channel guides the fluid toward said fluid ejection channel in a direction away from said beam path.

2. The processing nozzle according to claim 1 , wherein
said inner cone and said outer cone are coaxially arranged,
said fluid guide channel has at least one opening that is opened to guide the fluid to said fluid ejection channel, and
a buffer is formed between said opening and said fluid ejection channel.

3. The processing nozzle according to claim 2 , wherein
the number of said at least one opening is larger than that of said introduction ports.

4. The processing nozzle according to claim 2 , wherein said openings are arranged to be rotationally symmetrical with respect to said beam path as an axis.

5. The processing nozzle according to claim 1 , wherein
said fluid guide channel is formed by a plurality of sequentially arranged branching portions,
each branching portion includes a branching portion flow inlet into which a fluid flows, and a branching portion opening from which the fluid flows out, and
the branching portion flow inlet of a last branching portion of the plurality of sequentially arranged branching portions is arranged closer to said beam path than the branching portion opening of said last branching portion.

6. The processing nozzle according to claim 5 , wherein the branching portion flow inlet of a specific branching portion of the plurality of branching portions is arranged outside the branching portion opening of said branching portion, thereby guiding the fluid flowing through said branching portion in a direction in which the fluid approaches said beam path.

7. An optical machining apparatus a comprising the processing nozzle recited in claim 1 .

8. The optical machining apparatus according to claim 7 , further comprising:
a material storage portion that stores a material contained in the fluid; and
a material supplier that supplies the fluid to said processing nozzle.

9. A processing head comprising:
the processing nozzle recited in claim 1 ;
said light source;
a light transmitter that transmits light generated from said light source; and
an optical system that guides the light transmitted from said light transmitter to said beam path.

10. An optical machining apparatus comprising the processing head recited in claim 9 .

Assignees

• Tech Res Association Future Additive Manufacturing

Inventors

• Ohno Hiroshi
• Tsuno Satoshi
• Sasaki Yuji
• OBARA Go
• Okada Naotada

Classifications

• B23K26/342

  Build-up welding · CPC title

• B23K26/21

  by welding · CPC title

• B23K26/1476 Primary

  Features inside the nozzle for feeding the fluid stream through the nozzle · CPC title

• B23K26/144

  the fluid stream containing particles, e.g. powder · CPC title

• B05B7/228

  using electromagnetic radiation, e.g. laser · CPC title