Abstract: An additive manufacturing system includes a build surface, one or more laser energy sources, and an optics assembly. Exposure of a layer of material on the build surface to laser energy from the optics assembly melts at least a portion of the layer of material. A gas flow head is coupled to the optics assembly and defines a partially enclosed volume between the optics assembly and the build surface. The gas flow head includes a gas inflow through which a supply gas flows into the gas flow head, a gas outflow through which a return gas flows out of the gas flow head, and an aperture arranged to permit transmission of the laser energy through the gas flow head to the build surface. The supply gas and return gas define a gas flow profile within the gas flow head.

Abstract: A wire guide and a laser wire-processing device that includes a wire guide are provided. The laser wire-processing device includes a housing and an aperture in a side of the housing, wherein the aperture defines a longitudinal axis that is substantially perpendicular to the aperture. The laser wire-processing device also includes a backstop arranged in the housing and aligned with the longitudinal axis, the backstop defining a wire-contact surface in a facing relationship with the aperture. The laser wire-processing device also includes a wire guide arranged in the housing to manipulate a wire inserted through the aperture into a desired position relative to the longitudinal axis between the aperture and the backstop. The laser wire-processing device also includes a laser operable to direct a laser beam toward an insulation layer of the wire. The wire guide could be a tube arranged in the device or a backstop guide.

Abstract: A laser cutting apparatus and method, and a method of manufacturing a display panel by using a laser cutting method are provided. A laser cutting method includes: providing a panel in which a second substrate is stacked on a first substrate including a conductive wiring; and removing a portion of the second substrate to expose the conductive wiring by emitting a laser beam to the second substrate, and the laser beam is emitted to the second substrate at an incident angle equal to or greater than a threshold angle at which total reflection occurs in the second substrate.

Abstract: A device for the protection of laser optics or to their lifetime increase. The device for the protection of laser optics comprises a housing arranged below a laser optics housing with a connection for the supply of a cutting gas, and on the opposite side to the laser optics outlet nozzle for the cutting gas and a pressure-resistant protective glass on the side of the laser optics and a process-side protective glass, which is arranged between the nozzle and pressure-resistant protective glass available.

Abstract: A laser processing apparatus includes a holder configured to hold a workpiece, a head, a first nozzle, and a driver. The head is configured to irradiate a first portion of a main surface of the workpiece with a laser beam. The first nozzle is configured to supply a first liquid to the first portion. The driver is configured to drive the holder in such a manner that the workpiece can revolve around the optical axis of the laser beam at the first portion. Accordingly, the workpiece can be processed, and debris of the workpiece can be prevented from adhering to the main surface of the workpiece.

Abstract: A wire electrical discharge machine includes: a pulse detection unit configured to detect voltage pulses repeatedly applied between a workpiece and a wire electrode; an instability calculation unit configured to calculate the degree of instability indicating how unstable the discharge state is, by using the number of non-discharge pulses that present no voltage drop due to electrical discharge, among the pulses detected per unit time by a pulse detection unit; and a machining condition changing unit configured to change a machining condition for the workpiece, based on the calculated degree of instability.

Abstract: A micro-region semi-solid additive manufacturing method is provided, where rod-shaped materials are used as consumables, and front ends of the consumables are heated by means of high-energy beam, an electric arc, a resistance heat, or the like, to enable the front ends to be in a semi-solid state in which the solid-liquid two phases coexist; at the same time, the rotational torsion and the axial thrust are applied to the consumables to perform shearing, agitation and extrusion on the semi-solid front ends, that is, the mold-free semi-solid rheoforming is performed. The consumable is transmitted to the bottom layer metal continuously in this manner to form metallurgical bonding, the stacking process is repeated according to a planned route obtained after discretization slicing treatment, and then an object or a stack layer in a special shape can be formed.

Abstract: A hot water dispenser and a method for determining a boiling point of water in the same. The hot water dispenser contains a reservoir, a heating element, and a sensor. The method includes heating water in the reservoir with a first power value of the heating element during a first period of time until a value indicative of a threshold temperature of water is determined; upon reaching the threshold temperature, heating the reservoir water with a second power value of the heating element, which is lower than the first power value, during a second period of time until a water-temperature-rise-per-time value is lower than a first predetermined value; subsequently, increasing the power value of the heating element to a third power value during a third period of time; determining the boiling-point temperature of water by determining the highest temperature of water between the first and third periods of time.

Abstract: Monitoring melt pool temperature in laser powder bed fusion by providing a build laser that produces a laser beam that is directed onto the melt pool and produces an incandescence that emanates from the melt pool, receiving the incandescence and producing a first image having a first spectral band and a second image having a second spectral band, and determining the ratio of said first image having a first spectral band and said second image having a second spectral band to monitor the melt pool temperature.

Abstract: A method for restoring a blade or vane platform of a gas turbine assembly configured for a power plant by: providing a blade or a vane having a platform with an edge deterioration zone; removing the deterioration zone by electro discharging machining technology; and rebuilding a removed zone by additive manufacturing technology. The removing can be performed to create a recessed plane along a platform edge, the recessed plane being connected to a platform plane by an enter inclined plane and an exit inclined plane arranged opposed along the platform edge.

Abstract: A laser processing machine includes a guide member with which a laser head is engaged so as to be movable to one side in a conveying direction, a moving device configured to move the laser head along the guide member, a counterweight which is movably engaged to the other side of the guide member in the conveying direction and moves along the guide member in a direction opposite to a moving direction of the laser head in conjunction with the laser head moved by the moving device, and a control device which controls the moving device to move the counterweight to a position facing the grease feeding device and to perform grease feeding to an engaged portion between the counterweight and the guide member.

Abstract: A food heating device with multilayer shelf includes a base, one or more shelf support, a first side wall member, a second side wall member, a bottom cover member, a middle cover member, and a top lamp bracket. There are two or more layers of heating rollers between the first side wall member and the second side wall member. The bottom cover member and the middle cover member are disposed above bottom heating rollers and middle heating rollers. Each of the cover members at different layers has a cover body. The cover body covers foods on the heating rollers. In addition, one or more lamp bodies can be provided. The food heating device with multilayer shelf is capable of increasing space for exhibition of foods and also increasing overall brightness by adding the lamp bodies.

Abstract: A steam generator includes: a base module which has a water supply port for receiving steam water; and a steam module which is connected to an upper side of the base module, in which the steam module includes: a main body which has an upper surface and a lower surface; a flow pipe which is positioned at a central portion of the main body and into which the steam water flows; and a heater which supplies heat to the flow pipe, and in which another steam module is selectively coupled to an upper side of the steam module. According to this, the internal volume of the steam generator and the output of the heater provided in the steam generator can be selectively varied so as to provide an optimum output according to the volume of a cooking device in which the steam generator is installed.

Abstract: A nozzle cover for a laser drill includes a mount, a first shell member, and a second shell member. The mount has a first opening centered about a drill axis through which a nozzle can extend. The first shell member extends along the drill axis and has a first end attached to the mount at a first pivot and a second end with a first notch. The second shell member extends along the drill axis and has a first end attached to the mount at a second pivot and a second end with a second notch. The first shell member and the second shell member are configured to pivot between a closed position in which the first shell member and the second shell member form a hollow interior portion coaxial with the drill axis to enclose the nozzle and an open position in which the nozzle is exposed.

Abstract: A method of welding laminated metal foils (LMF) by projecting a laser beam onto LMF sandwiched between an upper metal plate and a lower metal plate from a side of the upper metal plate and laser-welding the LMF to the upper metal plate and the lower metal plate. The method includes: forming a hole in an upper surface of the upper metal plate and forming a chamfered part so that a diameter of the hole expands toward the upper surface before the laser welding; and in the laser welding, projecting the laser beam for heat conduction welding onto the chamfered part of the upper metal plate to form a molten pool; and projecting the laser beam in a circle to agitate the molten pool and grow the molten pool in a laminating direction of the LMF so that the molten pool reaches the lower metal plate.

Abstract: A double-side synchronous laser shock peening (LSP) method for leading edges of turbine blades employs two laser beams with the same diameter and different pulse energy to synchronously shock the front and back sides of each point within 8-10 mm range of the leading edge of the blade, wherein the laser pulse energy on the front side is greater than the laser pulse energy on the back side, and wherein, the laser power density on the front side is used to generate dynamic plastic deformation on the entire laser-shock spot area, while the laser power density on the back side is used to balance off excessive shock-wave pressure in the central area of laser-shock spot on the front side and avoid macroscopic deformation of the blade in the central area of laser-shock spot on the front side, and an optimal strengthening effect is achieved finally.

Abstract: A laser welding method and a laser welding apparatus capable of preventing formation of blowholes and obtaining an excellent welled state are provided. An embodiment is a laser welding method for a component to be welded 40 including a third metal component 40c sandwiched between first and second metal components 40a and 40b, in which the metal components are welded to each other by scanning a laser beam in a first direction perpendicular to a direction in which the third metal component 40c is sandwiched, in which a welded part 42 is formed by applying a first laser beam 12a while scanning it in the first direction and thereby melting and then solidifying the component to be welded 40.

Abstract: A radio frequency heating system includes a radio frequency heating chamber, a fluorescence temperature measuring transmitter, and a central control unit connected to the fluorescence temperature measuring transmitter. A radio frequency heating container is arranged at the bottom of the radio frequency heating chamber. The radio frequency heating container comprises a fluorescent material with temperature-sensitive fluorescent characteristics, which is excitable by excitation light to produce fluorescence. A light path is provided between the radio frequency heating container and the fluorescence temperature measuring transmitter. The fluorescence temperature measuring transmitter includes a light emitting device for generating excitation light and a driving circuit thereof, a photoelectric converter device for receiving fluorescence, and a signal processing and output circuit for processing output signals of the photoelectric converter device.

Abstract: A cutting device for a thin semiconductor wafer includes a laser light generator and a polygonal mirror structure. The laser light generator is used to provide a femtosecond laser light with a pulse width on a femtosecond order (10?15 second). The polygonal mirror structure is used to reflect the femtosecond laser light. The polygonal mirror structure has a plurality of reflective surfaces. The polygonal mirror structure rotates continuously with respect to the femtosecond laser light, such that the femtosecond laser light is sequentially and repeatedly reflected by the plurality of reflective surfaces and projected on a semiconductor wafer. The femtosecond laser light projected on a semiconductor wafer moves repeatedly along a same predetermined direction in a predetermined range during a predetermined time to groove or cut the semiconductor wafer.