DEVICE FOR IMPROVING RESIDUAL STRESS IN PIPING

摘要

A welded part and its vicinity of T-shaped piping is efficiently heated by laser to remove residual stress in the piping. More specifically, residual stress is removed by irradiating and heating a welded part of T-shaped piping (50) with a laser beam emitted from a laser head (10). The position of the laser head (10) in the ? direction is adjusted by a rotary traveling carriage (3) traveling along a ring rail (2), the position of the laser head (10) in the Z direction is adjusted through sliding of a vertical slide (4), the position of the laser head (10) in the L direction is adjusted through sliding of a radial slide (5), the a direction of the laser head (10) is adjusted through sliding of a circular arc piece slide (7) along a circular arc piece, the ß direction of the laser head (10) is adjusted through the rotation of a laser head supporting section (9), and the position of the laser head (10) in the ? direction is adjusted through oscillation.