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Title: Electron beam machining using rotating and shaped beam power distribution

Abstract

An apparatus and method for electron beam (EB) machining (drilling, cutting and welding) that uses conventional EB guns, power supplies, and welding machine technology without the need for fast bias pulsing technology. The invention involves a magnetic lensing (EB optics) system and electronic controls to: 1) concurrently bend, focus, shape, scan, and rotate the beam to protect the EB gun and to create a desired effective power-density distribution, and 2) rotate or scan this shaped beam in a controlled way. The shaped beam power-density distribution can be measured using a tomographic imaging system. For example, the EB apparatus of this invention has the ability to drill holes in metal having a diameter up to 1000 .mu.m (1 mm or larger), compared to the 250 .mu.m diameter of laser drilling.

Inventors:
 [1];  [2]
  1. Pleasanton, CA
  2. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
870504
Patent Number(s):
5534677
Assignee:
Regents of University of California (Oakland, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electron; beam; machining; rotating; shaped; power; distribution; apparatus; method; drilling; cutting; welding; conventional; guns; supplies; machine; technology; fast; bias; pulsing; involves; magnetic; lensing; optics; electronic; controls; concurrently; bend; focus; shape; scan; rotate; protect; gun; create; desired; effective; power-density; controlled; measured; tomographic; imaging; example; ability; drill; holes; metal; diameter; 1000; larger; compared; 250; laser; magnetic lens; electron beam; density distribution; beam power; power distribution; power supplies; tomographic imaging; laser drilling; welding machine; /219/250/

Citation Formats

Elmer, John W, and O'Brien, Dennis W. Electron beam machining using rotating and shaped beam power distribution. United States: N. p., 1996. Web.
Elmer, John W, & O'Brien, Dennis W. Electron beam machining using rotating and shaped beam power distribution. United States.
Elmer, John W, and O'Brien, Dennis W. Mon . "Electron beam machining using rotating and shaped beam power distribution". United States. https://www.osti.gov/servlets/purl/870504.
@article{osti_870504,
title = {Electron beam machining using rotating and shaped beam power distribution},
author = {Elmer, John W and O'Brien, Dennis W},
abstractNote = {An apparatus and method for electron beam (EB) machining (drilling, cutting and welding) that uses conventional EB guns, power supplies, and welding machine technology without the need for fast bias pulsing technology. The invention involves a magnetic lensing (EB optics) system and electronic controls to: 1) concurrently bend, focus, shape, scan, and rotate the beam to protect the EB gun and to create a desired effective power-density distribution, and 2) rotate or scan this shaped beam in a controlled way. The shaped beam power-density distribution can be measured using a tomographic imaging system. For example, the EB apparatus of this invention has the ability to drill holes in metal having a diameter up to 1000 .mu.m (1 mm or larger), compared to the 250 .mu.m diameter of laser drilling.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

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