Apparatus for improving residual stress of piping technical...

Details Apparatus for improving residual stress of piping technical... Apparatus for improving residual stress of piping technical...

2005-07-28

2011-10-25

Yuen, Henry (Department: 3742)

Electric heating

Metal heating

By arc

C219S121790, C219S121630, C219S125110

Reexamination Certificate

active

08044323

ABSTRACT:
A weld zone of T-piping and its neighborhood are efficiently laser-heated to remove residual stress. For this purpose, the weld zone of a T-piping (50) is irradiated and heated with a laser beam emitted from a laser head (10) to remove residual stress. At this time, a rotating travel cart (3) travels along a ring rail (2) to adjust the position of the laser head (10) in a θ-direction, a vertical slide (4) slides to adjust the position of the laser head (10) in a Z-direction, a radial slide (5) slides to adjust the position of the laser head (10) in an L-direction, an arcuate piece slide (7) slides along an arcuate piece to adjust the α-direction of the laser head (10), a laser head support portion (9) turns to adjust the β-direction of the laser head (10), and oscillation adjusts the position of the laser head (10) in a γ-direction.

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International Search Report of PCT/JP2005/013801, date of mailing Oct. 25, 2005.
Supplementary European Search Report dated Jul. 4, 2011, issued in corresponding European Patent Application No. 05767038.2.

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