A gas supply device for a laser machining head is provided for generating a homogeneous gas flow. The gas supply device includes a gas inlet, a shared volume for superimposing a laser beam and the gas flow, and a gas channel system which, starting from the gas inlet, branches at least twice and connects the gas inlet with several outlet openings at the shared volume. The gas channel system and the outlet openings are configured to provide a substantially homogeneous gas flow to the shared volume.

A machining program generation device that generates a machining program for controlling a 3D printing apparatus to form an object by stacking a plurality of layers, includes: a machining route generation unit that extracts a plurality of support points that are based on an end point, an intersection point, and a bending point of the machining path from machining path data indicating a shape and a position of the machining path for forming each of the plurality of layers, and generates a machining route by adding, to the machining path, an order of shaping indicating that shaping of the support points is to be executed first and then shaping of a gap line segment connecting the plurality of support points shaped is to be executed; and a machining program generation unit that generates a machining program for controlling the 3D printing apparatus according to the machining route.

A hot wind is blown to a land and a lead from the underside of a printed board, to perform preheating. At the start of preheating or after start of preheating, a laser beam is applied to a soldering point, and meanwhile, wire solder is fed to a position contacting with the soldering point. The fed wire solder is melted by the laser beam. After soldering is finished, feeding of the wire solder is stopped. Application of the laser beam is stopped, to solidify the melted solder.

Disclosed is a way of providing a surface processing method for concrete in which vitrifying is suppressed even when high-speed processing is performed. In a surface processing method of concrete, a surface of the concrete is irradiated with a laser beam so that a beam spot is scanned along a predetermined scanning pattern and the scanning pattern moves along the surface at a predetermined feed speed. When the beam spot repeatedly passes through a predetermined portion in the scanning pattern, an overlap ratio, which is a ratio of overlapping of a passage path of the beam spot over a passage path of the beam spot in an immediately preceding irradiation, is 90% or less.

A nozzle for a laser processing head is provided. The nozzle includes a primary passage disposed in a body of the nozzle. The primary passage is configured to direct a laser beam and a primary fluid from a proximal end of the body to a distal end of the body. The nozzle also includes a set of at least one auxiliary passage disposed in the body of the nozzle and radially offset from a longitudinal axis of the primary passage. A distal portion of the auxiliary passage diverts into two fluid flow passages including (i) a first fluid flow passage configured to direct a first portion of an auxiliary fluid axially forward toward the distal end of the nozzle body, and (ii) a second fluid flow passage configured to direct a second portion of the auxiliary fluid radially inward to mix with the primary fluid in the primary passage.

A controlled thermal coefficient product manufacturing system and method is disclosed. The disclosed product relates to the manufacture of metallic material product (MMP) having a thermal expansion coefficient (TEC) in a predetermined range. The disclosed system and method provides for a first material deformation (FMD) of the MMP that comprises at least some of a first material phase (FMP) wherein the FMP comprises martensite randomly oriented and a first thermal expansion coefficient (FTC). In response to the FMD at least some of the FMP is oriented in at least one predetermined orientation. Subsequent to deformation, the MMP comprises a second thermal expansion coefficient (STC) that is within a predetermined range and wherein the thermal expansion of the MMP is in at least one predetermined direction. The MMP may be comprised of a second material phase (SMP) that may or may not transform to the FMP in response to the FMD.

The laser processing apparatus according to this disclosure includes a laser oscillator to generate laser light, a processing table to place a workpiece thereon, the workpiece having a protective sheet on a surface thereof, the protective sheet including a laser light absorbing layer, a laser head to process the workpiece with the laser light, and a control unit to adjust a position of the laser head so that a focal position of the laser light is brought to a position away from the surface of the workpiece toward the laser head, and to control power of the laser light so that marking is provided by causing the laser light absorbing layer to absorb the laser light and thus transforming the inside of the protective sheet.

A laser head apparatus that enables the use of smaller parallel converging laser beams that create multiple smaller holes in a material followed by a larger parallel diverging laser beams that remove additional material. The laser head apparatus includes laser optics and purging nozzles. A process for removing material using the laser head apparatus includes moving the laser head apparatus to a position to generate parallel converging laser beams at a target location in the material and moving the laser head apparatus to a position to generate parallel diverging laser beams at the target location from the converging laser beams.

A laser head apparatus that enables switching between a laser beam and a purging stream. The laser head apparatus includes a bracket that provides for translation and rotation of the laser optics and purging nozzle. The laser optics and purging nozzle are located on opposite sides of the bracket and may be rotated to different rotational positions around a center axis of the bracket and translated to different linear positions along a length of the bracket. Methods of removing material using the laser head apparatus to between a laser beam and a purging stream are also provided.

A method and device for laser cladding by independently heating the cladding material and the surface of the workpiece consist in formation of the series of parallel annular laser beams, possibly different wavelengths, with an adjustable distribution of laser radiation power across the annular beams. The annular beams are transformed into a series of conical beams which are separately focused along a single optical axis, along which the cladding material is fed. The device can be supplemented with a cylindrical mirror for the multipass laser radiation through the stream of cladding material with the possibility of the laser radiation return to the laser resonator.