Method and device for reducing overpenetration at the start of plasma arc welds

Patent · 31 December 1997

OSTI ID:871666

Sanders, John M ^[1]; Lehmann, John M ^[2]; Ryan, Patrick M ^[3]

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1. Jackson Township, Stark County, OH
2. Bedford County, VA
3. Washington Township, Stark County, OH

A shim for improving plasma arc weld quality has ends tapered at about 25.degree. and notches at each end roughly centered over the corner between the tapered ends and main body of the shim. The improved shim allows lower starting plasma arc heat input and reduces the occurrence of sagging, or overpenetration, of the weld.

• Research Organization: BABCOCK & WILCOX CO
• DOE Contract Number: AC11-95PN38196
• Assignee: McDermott Technology, Inc. (New Orleans, LA)
• Patent Number(s): US 5773786
• OSTI ID: 871666
• Country of Publication: United States
• Language: English

Related Subjects

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25
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degree
device
heat
heat input
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main
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notches
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overpenetration
plasma
quality
reduces
reducing
roughly
sagging
shim
start
starting
tapered
weld
weld quality
welds