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Title: Method and device for controlling plume during laser welding

Abstract

A method and apparatus for enhancing the weldment of a laser welding system is provided. The laser weld plume control device includes a cylindrical body defining an upside-down cone cavity; the upper surface of the body circumscribes the base of the cone cavity, and the vertex of the cone cavity forms an orifice concentrically located with respect to the laser beam and the plume which forms as a result of the welding operation. According to the method of the invention, gas is directed radially inward through inlets in the upper surface of the body into and through channels in the wall of the body and finally through the orifice of the body, and downward onto the surface of the weldment. The gas flow is then converted by the orifice of the device from radial flow to an axisymmetric gas jet flowing away from the weldment surface in a direction perpendicular to the surface and opposite to that of the laser.

Inventors:
 [1];  [2];  [2];  [2]
  1. Tijeras, NM
  2. Albuquerque, NM
Publication Date:
Research Org.:
AT & T CORP
OSTI Identifier:
867705
Patent Number(s):
US 4992643
Assignee:
United States Department of Energy (Washington, DC)
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; device; controlling; plume; laser; welding; apparatus; enhancing; weldment; provided; weld; control; cylindrical; defining; upside-down; cone; cavity; upper; surface; circumscribes; base; vertex; forms; orifice; concentrically; located; respect; beam; result; operation; according; gas; directed; radially; inward; inlets; channels; wall; finally; downward; flow; converted; radial; axisymmetric; jet; flowing; direction; perpendicular; opposite; direction perpendicular; radially inward; gas jet; laser welding; upper surface; control device; gas flow; laser beam; radial flow; welding operation; laser weld; concentrically located; /219/

Citation Formats

Fuerschbach, Phillip W, Jellison, James L, Keicher, David M, and Oberkampf, William L. Method and device for controlling plume during laser welding. United States: N. p., 1991. Web.
Fuerschbach, Phillip W, Jellison, James L, Keicher, David M, & Oberkampf, William L. Method and device for controlling plume during laser welding. United States.
Fuerschbach, Phillip W, Jellison, James L, Keicher, David M, and Oberkampf, William L. Tue . "Method and device for controlling plume during laser welding". United States. https://www.osti.gov/servlets/purl/867705.
@article{osti_867705,
title = {Method and device for controlling plume during laser welding},
author = {Fuerschbach, Phillip W and Jellison, James L and Keicher, David M and Oberkampf, William L},
abstractNote = {A method and apparatus for enhancing the weldment of a laser welding system is provided. The laser weld plume control device includes a cylindrical body defining an upside-down cone cavity; the upper surface of the body circumscribes the base of the cone cavity, and the vertex of the cone cavity forms an orifice concentrically located with respect to the laser beam and the plume which forms as a result of the welding operation. According to the method of the invention, gas is directed radially inward through inlets in the upper surface of the body into and through channels in the wall of the body and finally through the orifice of the body, and downward onto the surface of the weldment. The gas flow is then converted by the orifice of the device from radial flow to an axisymmetric gas jet flowing away from the weldment surface in a direction perpendicular to the surface and opposite to that of the laser.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

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