A laser machining apparatus that separates a workpiece into a machined product and a remnant material by cutting using irradiation with a laser beam includes: a nozzle that squirts gas at a machining point; a rotation mechanism that causes the nozzle or the workpiece to rotate about an optical axis; and a controller that performs control of the rotation mechanism. This control causes the nozzle, which squirts the gas at the machining point, to be at the machined product side during the cutting.

Methods and apparatus for laser patterning leverage mask trench debris removal techniques to form etch singulation trenches. In some embodiments, the method includes forming a mask layer on the wafer, forming a pattern in the mask layer using a laser of a laser assembly where the pattern allows singulation of the wafer by deep etching and forms a trench in the mask layer with a laser beam which has a process point at a bottom of the trench, directing gas nozzles that flow a pressurized gas at the process point in the trench as the pattern is formed with a gas flow angle relative to the process point and evacuating debris from the trench using an area of negative pressure where the gas flow from gas nozzles and the area of negative pressure are in fluid contact and are confined within a cylindrical housing.

An example gas ejection device, for a cutting apparatus, comprises a housing to retain a gas and a slot provided in the housing. A nozzle is movably disposed within the slot. The nozzle is to discharge a gas retained in the housing.

An additive manufacturing apparatus includes: a material supply unit that supplies a build material to a process area of an additive target surface; an irradiation unit that irradiates the process area with a laser beam that melts the build material; and a control device that controls the material supply unit and the irradiation unit for creating at least a part of an object using a dot-shaped bead, the dot-shaped bead being formed of the build material melted by radiation of the laser beam. The additive manufacturing apparatus can improve the shape accuracy of the object.

A laser processing apparatus may include: a laser generator configured to generate a laser beam; a stage configured to support a target object; at least one supply nozzle on the stage to eject an air toward the stage; a suction unit configured to inhale external air; and a suction structure on the stage and adjacent to the at least one supply nozzle. The suction structure may include a suction hole connected to the suction unit to inhale the external air. The suction structure may include an inclined surface in which the suction hole is defined. The suction structure may include a first surface adjacent to the supply nozzle, and an opening may be defined in a region of the first surface adjacent to a bottom surface. A distance between the inclined surface and the target object may be less than or equal to a height of the opening.

Laser processing systems and methods are capable of moving a laser beam while maintaining consistent laser beam characteristics at processing locations. The laser processing systems generate a collimated laser beam having a consistent Z axis power density along at least a portion of a length of the laser beam and dither the collimated laser beam along one of the X and Y axes. The dithering of the collimated laser beam facilitates consistent laser processing on a three-dimensional surface, for example, to provide consistent deposition of a coating in a laser cladding process. A laser processing system may include a beam delivery system that provides both the collimation and the dithering of the collimated laser as well as an adjustment of the beam diameter of the collimated beam.

An additive manufacturing method uses an additive manufacturing device performing additive machining by controlling a machining head including a nozzle to supply columnar build material to a machining region on a target surface and a beam nozzle to irradiate the machining region with beam melting the build material, the nozzle and the beam nozzle being provided non-coaxially. When additive machining is performed in a state where the machining head is located with central axes of the beam and the build material being positioned on a single vertical plane, the machining path is divided into divided machining paths such that the machining head is moved in one direction along a direction of the build- material central axis when motion of the machining head is projected onto a plane perpendicular to an irradiation direction of the beam, and the machining head is moved along each divided machining path to perform additive machining.

A laser processing method for laser processing of a workpiece made of a base material and a fiber reinforced composite material containing fibers having a thermal conductivity and a processing threshold higher than physical properties of glass fibers. The laser processing method includes a step of processing the workpiece by forming a plurality of through-holes extending through the workpiece by irradiating the workpiece with pulsed laser light from a processing head while relatively moving the workpiece and the processing head in a predetermined cutting direction. The pulsed laser light has a pulse width smaller than 1 ms and an energy density capable of forming each of the through-holes by a single pulse.

A laser machining apparatus that separates a workpiece into a machined product and a remnant material by cutting using irradiation with a laser beam includes: a nozzle that squirts gas at a machining point; a rotation mechanism that causes the nozzle or the workpiece to rotate about an optical axis; and a controller that performs control of the rotation mechanism. This control causes the nozzle, which squirts the gas at the machining point, to be at the machined product side during the cutting.

A numerical control device includes: a program analyzing unit analyzing a transition of a moving velocity of a machining head and a transition of a supply amount of a material supplied to a beam-irradiation position based on a machining program; a movement distance calculating unit calculating a first distance based on a result of analysis performed by the program analyzing unit, the first distance being a length of a first movement section to a first position at which addition of the material to the workpiece is started, the first movement section being a section through which the machining head is moved while the head is accelerated; and a condition command generating unit generating a supply command to increase the supply amount of the material per hour from zero to a command value according to a machining condition while the machining head is moved through the first movement section.