A multiply-wound tube includes: a tube body formed by winding, into a roll, a metal plate comprising a core material layer made of a first metal material and a brazing material layer made of a second metal material having a lower melting point than the core material layer; and a joint portion that is formed at a portion of the metal plate that is wound in layers, wherein the portion of the metal plate that is wound in layers is brazed together by the brazing material layer being melted by heat from a laser projected onto the tube body.

A wear-resistant member production method includes: forming a clad layer by moving, relative to a substrate while feeding cladding powder onto the substrate and melting it using a local heating device; and cutting the clad layer. The cladding powder includes matrix powder containing a copper-based alloy, and hard powder including, as a hard phase, a silicide containing one or more elements selected from Cr, Fe, Co, Ni, and Cu, and one or more elements selected from Mo, W, and Nb. The hard powder includes first hard powder and second hard powder. The second hard powder is fed, separately from the first hard powder, to a melt pool formed by melting the first hard powder and the matrix powder, such that at least part of the second hard powder remains unmelted within the clad layer.

A laser tool includes a tool body disposed at least partially along a central longitudinal axis, and a head unit connected to the tool body with a rotational joint. The head unit rotates around the central longitudinal axis with the rotational joint, includes a laser head to direct a laser energy toward a target and along a second longitudinal axis of the head unit. A purging nozzle, fluidly connected to a fluid source, includes a nozzle outlet oriented at an angle relative to the second longitudinal axis of the head unit, and directs fluid at an angle into a pathway of the laser energy from the laser head to bias purged material out of the pathway of the laser energy. The rotational joint supports the head unit on the tool body, and moves the head unit in a radial direction relative to the central longitudinal axis.

The laser machining equipment for etching grooves in a wall of a mechanical part, in particular of a connecting rod for a spark ignition engine, is provided with a fibre optic laser device and arranged to supply laser pulses. The fibre optic laser device is controlled so that said laser pulses have a peak power of more than 400 W and at least two times greater than the maximum mean power of said laser device and in that the duration of said laser pulses is below or within the nanosecond range (1 ns to 1000 ns). According to a first embodiment, the fibre optic laser device is controlled in a quasi continuous wave (QCW) mode. According to a second preferred embodiment, the fibre optic laser device is controlled in a Q-switch mode. The selected operating modes increase machining efficiency and produce a groove with an optimum transverse profile, particularly with a small mean radius of curvature at the bottom of the groove which then allows precise subsequent fracturing of the mechanical part with less force.

There is provided high power laser systems, high power laser tools, and methods of using these tools and systems for cutting, sectioning and removing structures objects, and materials, and in particular, for doing so in difficult to access locations and environments, such as offshore, underwater, or in hazardous environments, such as nuclear and chemical facilities. Thus, there is also provided high power laser systems, high power laser tools, and methods of using these systems and tools for removing structures, objects, and materials located offshore, under bodies of water and under the seafloor.

According to one embodiment, a laser processing device includes a light irradiation section, and an optical element. The optical element includes a first transparent member provided via a gap with a tip of the light irradiation section, and a second transparent member. The first transparent member includes a first surface opposed to the tip of the light irradiation section, and a second surface provided so as to be connected to the first surface. The second transparent member includes a flat surface and a convex surface, the flat surface being provided so as to be opposed to the second surface of the first transparent member, the light passed through the first transparent member passing through the convex surface. An optical axis of the laser beam passing through the first surface and an optical axis passing through the convex surface are different from each other.

According to one embodiment, a laser processing device includes a light irradiation section, and a mirror. The light irradiation section is adapted to emit a laser beam from a light source from a tip. The mirror is opposed to the tip of the light irradiation section. The mirror is adapted to reflect the laser beam emitted from the light irradiation section with an aspherical reflecting surface. An angle formed between the laser beam transmitted from the light irradiation section to the mirror and the laser beam reflected by the mirror is equal to or larger than 90 degrees.

There is provided high power laser systems, high power laser tools, and methods of using these tools and systems for cutting, sectioning and removing structures objects, and materials, and in particular, for doing so in difficult to access locations and environments, such as offshore, underwater, or in hazardous environments, such as nuclear and chemical facilities. Thus, there is also provided high power laser systems, high power laser tools, and methods of using these systems and tools for removing structures, objects, and materials located offshore, under bodies of water and under the seafloor.

There is provided high power laser systems, high power laser tools, and methods of using these tools and systems for cutting, sectioning and removing structures objects, and materials, and in particular, for doing so in difficult to access locations and environments, such as offshore, underwater, or in hazardous environments, such as nuclear and chemical facilities. Thus, there is also provided high power laser systems, high power laser tools, and methods of using these systems and tools for removing structures, objects, and materials located offshore, under bodies of water and under the seafloor.

A method of forming an internally-arranged laser-beam weld from within a composite structure. The method includes arranging a welding apparatus within an internal passage of the composite structure, and emitting a laser beam from the welding apparatus to form the internally-arranged laser-beam weld between layers of the composite structure.