摘要:
A repair method for a structure having an open flaw (4) in a welding heat affected portion (3), including, removing at least a part of the open flaw and thereby forming a concave portion (8) in the welding heat affected portion, forming build-up weld layers (5) so as to fill the concave portion, treating a surface of the build-up layers to reduce tensile residual stress by means of at least one of laser peening, shot blasting and water jet machining. Also disclosed is an apparatus suitable for carrying out the repair method.
摘要:
An in-pipe work device comprising at least two movement mechanisms (20a, 20b) connected with each other in a longitudinal direction of a pipe (11) by a flexible tube (15), and a control device (19) for controlling the movement mechanisms (20a, 20b), the movement mechanisms (20a, 20b) including a body (21) connected to the flexible tube (15), a guide member (22) installed on the body (21) such that the guide member (22) is slidable in an axial direction, a support leg drive mechanism (24) provided on the guide member (22) and having a support leg (23) movable in a radial direction of the pipe (11), for pressing the support leg (23) against an inner wall of the pipe (11), thereby to hold the guide member (22) kept unmovable in an axis direction of the pipe (11), a slide mechanism (25) for relatively sliding the guide member (22) and the body (21), with the support leg (23) pressed against the inner wall of the pipe (11), thereby to slide the body (21) in the axis direction of the pipe (11), wherein the control device (19) controls the in-pipe movement device so as to move in a pipe (11) by itself, by sequentially operating the plurality of movement mechanism (20a, 20b) in a predetermined order.
摘要:
A surface heat-treating apparatus which focuses laser beam onto a surface of a workpiece for heat-treating the same comprises a composite cylindrical segment mirror and a cylindrical mirror provided in a subsequent stage thereof. The composite mirror is made of two cylindrical segment mirrors joined together with a predetermined angle in a V-shaped manner so that the laser beam reflected by the two component cylindrical segment mirrors of the composite mirror is transmitted to the cylindrical mirror in a manner reversed with respect to the lengthwise and widthwise directions of the composite cylindrical segment mirror and a heat-treating area of a rectangular configuration is thereby provided on the workpiece.
摘要:
A surface heat-treating apparatus which focuses laser beam onto a surface of a workpiece for heat-treating the same comprises a composite cylindrical segment mirror and a cylindrical mirror provided in a subsequent stage thereof. The composite mirror is made of two cylindrical segment mirrors joined together with a predetermined angle in a V-shaped manner so that the laser beam reflected by the two component cylindrical segment mirrors of the composite mirror is transmitted to the cylindrical mirror in a manner reversed with respect to the lengthwise and widthwise directions of the composite cylindrical segment mirror and a heat-treating area of a rectangular configuration is thereby provided on the workpiece.
摘要:
An underwater laser processing apparatus (100) includes an optical unit (3) and a nozzle (29). The optical unit irradiates a condensed laser beam generated by a YAG laser oscillator (35) to a certain point on a underwater workpiece (6). The nozzle has a gas exit for supplying a gas to the certain point. In the nozzle, an area surrounding the gas exit (25) extends to the surface of the workpiece. This area keeps the supplied gas between the nozzle and the workpiece to improve the underwater laser process.
摘要:
An in-pipe work device comprising at least two movement mechanisms (20a, 20b) connected with each other in a longitudinal direction of a pipe (11) by a flexible tube (15), and a control device (19) for controlling the movement mechanisms (20a, 20b), the movement mechanisms (20a, 20b) including a body (21) connected to the flexible tube (15), a guide member (22) installed on the body (21) such that the guide member (22) is slidable in an axial direction, a support leg drive mechanism (24) provided on the guide member (22) and having a support leg (23) movable in a radial direction of the pipe (11), for pressing the support leg (23) against an inner wall of the pipe (11), thereby to hold the guide member (22) kept unmovable in an axis direction of the pipe (11), a slide mechanism (25) for relatively sliding the guide member (22) and the body (21), with the support leg (23) pressed against the inner wall of the pipe (11), thereby to slide the body (21) in the axis direction of the pipe (11), wherein the control device (19) controls the in-pipe movement device so as to move in a pipe (11) by itself, by sequentially operating the plurality of movement mechanism (20a, 20b) in a predetermined order.