Beam/seam alignment control for electron beam welding

Patent · Tue Jan 01 04:00:00 EST 1980

OSTI ID:863484

Henry, J James ^[1]; Davenport, Clyde M ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

This invention relates to a dynamic beam/seam alignment control system for electron beam welds utilizing video apparatus. The system includes automatic control of workpiece illumination, near infrared illumination of the workpiece to limit the range of illumination and camera sensitivity adjustment, curve fitting of seam position data to obtain an accurate measure of beam/seam alignment, and automatic beam detection and calculation of the threshold beam level from the peak beam level of the preceding video line to locate the beam or seam edges.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4183055
• OSTI ID: 863484
• Country of Publication: United States
• Language: English

Related Subjects

/348/
accurate
accurate measure
adjustment
alignment
alignment control
apparatus
automatic
automatic control
beam
beam welding
calculation
camera
control
curve
curve fit
curve fitting
data
detection
dynamic
edges
electron
electron beam
fitting
illumination
infrared
level
limit
line
locate
measure
near
near infrared
obtain
peak
position
preceding
range
relates
seam
seam alignment
sensitivity
threshold
utilizing
video
welding
welds
workpiece