Flexible, adjustable welding backup mandrel

Metal fusion bonding – Seam backup means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

269 481, 219160, B23K 522, B23K 3704

Patent

active

053239504

ABSTRACT:
A backup mandrel apparatus to engage the inner surface of a metal tube being welded to support the weld bead and to keep a molten weld puddle from sagging and falling through the tube wall during welding. The apparatus includes a flexible inflatable bladder surrounded by a split expandable mandrel, an expandable band typically surrounding a central portion of the split expandable mandrel, insulation pads surrounding the mandrel adjacent to the expandable band and insulation material covering the inflatable bladder. The insulation pads preferably have a compressed thickness slightly greater than the band thickness. This assembly is inserted within the tubular workpiece to be welded. In use, the inflatable bladder is inflated with low air or water pressure to expand the mandrel to uniformly expand the expandable band to press the insulation pads against the inner side of the tubing workpiece being welded while leaving either no gap or a narrow gap between the band and the inner tube wall surface.

REFERENCES:
patent: 3261529 (1966-07-01), Pagan
patent: 4465220 (1984-08-01), Ledlow et al.
patent: 5110031 (1992-05-01), Rinaldi

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Flexible, adjustable welding backup mandrel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flexible, adjustable welding backup mandrel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible, adjustable welding backup mandrel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2372501

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.