3314 results about "Laser soldering" patented technology

Components for use in a temperature controlled heatable object are provided in which a temperature sensor is connected to a transmitter such as a Radio Frequency Identification (RFID) tag. The RFID tag is encased in a protective overmolding and connected to the temperature sensor via a mineral insulated cable. An end cap containing a potting material (such as silicone or ceramic) is placed over the temperature sensor and laser welded to a sheathing of the mineral insulated cable. A potting material for use in a heatable object is also provided comprising a silicone-based material that is modified by adding bauxite to increase thermal conductivity.

Methods and systems for laser-based processing of materials are disclosed wherein a scalable laser architecture, based on planar waveguide technology, provides for pulsed laser micromachining applications while supporting higher average power applications like laser welding and cutting. Various embodiments relate to improvements in planar waveguide technology which provide for stable operation at high powers with a reduction in spurious outputs and thermal effects. At least one embodiment provides for micromachining with pulsewidths in the range of femtoseconds to nanoseconds. In another embodiment, 100W or greater average output power operation is provided for with a diode-pumped, planar waveguide architecture.

The invention is directed to fluid-containing pouches and to methods for forming fluid-containing pouches. In one embodiment, the invention is to a fluid-containing pouch, comprising first and second opposing sheets, and a fluid (e.g., a calibrant fluid, a reactant fluid or a wash fluid) disposed between the first and second opposing sheets. The first sheet and the second sheet have a substantially liquid and gas impermeable perimeter seal. The sheets may be sealed, for example, by one or more of heat crimping, pressure crimping, heat and pressure crimping, ultrasonic welding, metal-to-metal welding or laser welding. Fluid-containing pouches sealed according to the disclosed methods and apparatuses show substantially improvement in terms of reduced gas exchange, notably CO2 pressurization levels.

The present invention discloses a method of efficiently manufacturing fuel cells having coated bipolar plates. The present invention contemplates the laser welding together of individual plates already having a coating thereon to form the bipolar plates that are used in a fuel cell. The laser welding of the coated plates together does not result in sensitization of the plates to a magnitude sufficient to cause an undesirable level of corrosion resistance. This result is achieved regardless of the presence of the organic coating in the region of the plates being welded and regardless of the ablating of the organic coating by the laser beam.

A laser weldable PBT-series resin composition comprises a polybutylene terephthalate (PBT)-series resin (A), and at least one resin (B) selected from the group consisting of a polycarbonate-series resin (b1), a styrenic resin (b2), a polyethylene terephthalate-series resin (b3) and an acrylic resin (b4). The PBT-series resin (A) may be a PBT homopolyester, or a PBT-series copolymer modified with not more than 30 mol % of a copolymerizable monomer (e.g., a bisphenol compound or an adduct thereof with an alkylene oxide, and an asymmetrical aromatic dicarboxylic acid). The ratio (weight ratio) of the resin (B) relative to the PBT-series resin (A) [the former / the latter] is about 0.1 / 1 to 1.5 / 1. The resin composition may comprise a glass fiber. The resin composition is excellent in laser weldability, and can improve in welding strength of a shaped article formed from the resin composition.

The invention discloses a laser-CMT welding aluminum alloy additive manufacturing method and a forming system. A laser and an electric arc are adopted as a composite heat source, the cold metal short circuiting transfer manner is adopted, and additive manufacturing forming for an aluminum alloy component is achieved. According to the provided laser-CMT welding additive manufacturing method, the problems that in the process of aluminum alloy component manufacturing through laser additive, the required laser power is high, and forming is difficult are solved, the problems that in the traditional process of aluminum alloy manufacturing through electric arc additive, the heat input amount is large, deformation is serious, and a molten bath is prone to overflowing or webbing are solved, and the problem that in the process of aluminum alloy manufacturing through CMT welding additive, incomplete fusion or slag inclusion or the like is likely to happen is solved; and the additive manufacturing method based on the laser-electric arc composite heat source principle is provided for additive manufacturing forming for the aluminum alloy component.

A spark plug is provided which ensures the reliability of a weld between a noble metal chip and a ground electrode as well as higher durability and ignitability of fuel. The ground electrode is joined to a metal shell, after which the noble metal chip is laser-welded to the ground electrode. The laser welding is achieved by emitting laser beams around an interface between the noble metal chip and the ground electrode outside a given angular range within which the metal shell will be an obstruction to the traveling of the laser beams. Specifically, the laser beams are emitted without any optical interference with the metal shell. This permits the angle between the orientation of each of the laser beams and the surface of the ground electrode to be minimized regardless of the metal shell, thus ensuring a desired depth of the fused portions in the noble metal chip.

The invention discloses a laser seal welding technique for a 3A21 aluminum alloy casing. The laser seal welding technique comprises the following steps of visual alignment, laser spot welding location and laser seal welding. The technological parameters of the laser seal welding are that the laser pulse peak power is 3000W-3500W, the impulse waveform is preheating thermal-insulation wave, the pulse width is 4ms-8ms, the pulse repetition frequency is 10Hz-20Hz, the welding speed is 108mm / min-180mm / min, and the defocusing amount is -1mm to -2mm. The laser seal welding technique for the 3A21 aluminum alloy casing can effectively remove cracks and air holes on welding seams of laser welding of the 3A21 aluminum alloy casing. The sealed 3A21 aluminum alloy casing has the beneficial effects of being attractive in welding seam appearance, high in air tightness, high in reliability, high in efficiency and low in cost.

A method of manufacturing a fluid dynamic bearing in which a stopper is fixed by welding. The bearing comprises a hub, a shaft erected on the hub, a sleeve, a cylindrical wall erected on the hub, and the stopper mounted on the cylindrical wall. The method comprises a first step to hold oil in the bearing gap, and a second step to locate the stopper on the peripheral wall being apart from the interface of the oil to fix the stopper by LASER welding.

The invention relates to an aluminum alloy laser welding method. The method comprises the following steps: firstly carrying out nanometer metal oxide pretreatment on a part to be welded, namely, coating or spraying a nanometer metal oxide layer on the welding bead of an aluminum alloy weldment, wherein the nanometre metal oxide is nanometer yttrium oxide preferably; and then carrying out laser welding. By utilizing the method, the absorptivity of the aluminum alloy surface for laser can be greatly increased up to about 90%, thereby increasing the effective heating depth of the laser, deepening the weld penetration of a welding seam, effectively decreasing the width of the welding seam and the width of a thermal influence area, and improving the structure of the welding seam metal; the crystalline grain of an aluminum alloy welding joint under the action of the nanometre metal oxide can be refined, and finally the weld penetration can be relatively deep. Moreover, the thermal influence area is very small, and the weldment is beautiful in appearance and has fine inner structures.

In a laser welding method, occurrence of weld defects is effectively prevented, and a high-quality weld joint is provided; and in addition, a wide range of material processes including a laser-using de p-penetration welding technique can be implemented. In keyhole welding using a laser performing output pulse modulation, the welding is conducted in accordance with a frequency conforming to a natural fr queucy of a metal molten pool.

The invention discloses an aluminum silicon carbide composite material with a laser welding layer and a preparing method of the aluminum silicon carbide composite material. The composite material is composed of the laser welding layer and an aluminum silicon carbide layer, the laser welding layer is composed of pure aluminum or aluminum alloy comprising silicon and aluminum, the volume fraction of the silicon in the aluminum alloy is a, the volume fraction of the aluminum in the aluminum alloy is b, the a is greater than 0 and less than or equal to 30%, and the b is greater than or equal to 30% and less than 100%. The aluminum silicon carbide layer is composed of silicon carbide and pure aluminum or aluminum alloy, and the volume fraction of the silicon carbide ranges from 30% to 70%. The preparing method comprises the steps that silicon carbide pelleting powder is prepared firstly, then silicon carbide preformed parts are prepared, and the aluminum silicon carbide composite material with the laser welding layer is prepared in the vacuum pressure impregnation method finally. The aluminum silicon carbide composite material is good in weldability and gas tightness, high in heat conductivity, low in coefficient of thermal expansion, simple in preparing method, efficient and low in cost.

Embodiments of the present invention help to provide a magnetic disk drive in which the base and the lid are securely welded together, so that the low-density gas sealed therein is protected from leakage. According to one embodiment, the peripheral surface of the rib of the base is machined to form the surface, which is free of electrocoating and weld surface. The outer lid, which completely conforms to the contour of the base, is placed on the rib, and the laser beam is directed onto the outer lid. Thus the position of laser beam irradiation varies within only ±0.05 mm for both the base and the lid. Laser welding in this manner yields the bead invariably, which makes the enclosure completely sealed without helium leakage.

Liquid filter constructions include a baffle plate secured to a can, by way of laser welding. A filter element is operably oriented within the interior of the can. The filter element includes a first end cap and a media pack secured to the first end cap. In some embodiments, the first end cap radially abuts an outer, annular surface of a tubular member of the baffle plate to form a radially directed seal between the first end cap and the tubular member. Liquid filter constructions of this type have a burst strength between 500-800 psi (about 3.4-5.5 MPa), along a longitudinal section of the can wall. Constructions of this type eliminate a roll or lock seam, an inner gasket, an inner compressive spring, and a gasket retainer. Systems for using liquid filters are described herein. Methods of constructing and using these types of filter arrangements are also described.

The invention provides a laser welding method. The laser welding method according to the present disclosure has a step for emitting laser light in a spiral shape along the welding site on a workpiece. The spiral shape is obtained by combining a circular path, in which a laser beam is moved in a circular shape, and a moving path, in which the laser beam is moved in the advancing direction along the welding site. First energy of the laser beam moving in the circular path so as to have an advancing-direction component is greater than second energy of the laser beam moving in the circular path so as to have a component in the direction opposite the advancing direction.

The invention discloses a pulsed high magnetic field auxiliary laser welding method and device. The method and device can be applied to laser spot welding and seam welding. According to the method, in the overall welding process, laser beams are emitted to a workpiece to form a welding connector, a high pulsed magnetic field is exerted to the welding connector which is just solidified and the surrounding area, the pulsed magnetic field generates pressure stress on the surface of the workpiece to enable the connector area to have plastic deformation, residual stress is released to lower the degree of stress concentration and the degree of structural deformation of the welding connector, and the fatigue strength of the welding connector is improved. The device comprises a laser, a pulsed magnetic field generator, a numerical control system, an optical transmission system and a laser pulsed magnetic field composite processing head. The processing head is used for integrating the laser beams and the high pulsed magnetic field, and regulating the perpendicular distance between an electromagnetic conversion device and the surface of the workpiece and the horizontal distance between the electromagnetic conversion device and the laser beams. By means of the pulsed high magnetic field auxiliary laser welding method and device, structural deformation can be lowered, welding quality and processing efficiency are improved, and the processing effect which is superior to that of an existing laser welding process is achieved.

The invention relates to an orbital welding device for mobile use in order to join a first pipe ( 1 ) and a second pipe end ( 2 ) along a circumferential joint ( 3 ) by at least one weld seam ( 4 ), particularly for producing a pipeline ( 5 ) to be placed on land. The inventive device includes a guide ring ( 6 ), which can be oriented toward the first pipe end ( 1 ) and the circumferential joint ( 3 ), and an orbital carriage ( 7 ) that can be motor-displaced along the guide ring ( 6 ) via an advancing device ( 8 ). On the orbital carriage ( 7 ), a laser welding head ( 12 ) for directing a laser beam ( 10 ) into a laser welding zone ( 13 ) is mounted in a manner that enables it to be oriented toward the circumferential joint ( 3 ) whereby enabling the production of the weld seam ( 4 ) along the circumferential joint ( 3 ) by displacing the orbital carriage ( 7 ). The laser beam ( 10 ) is produced by a high-power fiber laser beam source ( 9 ) located, in particular, on a mobile transport vehicle ( 35 ) while being situated at a distance from the orbital carriage ( 7 ), is guided by light guide ( 11 ) passing through a tube bundle ( 50 ) to the orbital carriage ( 7 ) and then supplied to the welding head ( 12 ). A significant advantage of the invention resides in the fact that the joining of two pipe ends by only one single welding process during a short period of time is made possible in the field with autonomous operation.

The invention provides a dual-laser beam hybrid welding device and a hybrid welding method. The dual-laser beam hybrid welding device comprises an ND: YAG (Neodymium-Doped Yttrium Aluminum Garnet) laser beam light path, and a dual-laser beam light path which is provided with a semiconductor laser beam light path and is arranged on a vertical dual-laser beam lens cone body. The dual-laser beam light path is provided with an ND: YAG total reflection lens, a semiconductor total reflection and ND: YAG total transmission combined lens, and a semiconductor and ND: YAG total transmission gathering lens in sequence from top to bottom. According to the invention, the high-freedom degree welding machining can be realized; the structure of the dual-laser beam hybrid welding device is simple and small; the alignment position is more accurate; and the automation is easy to realize. The dual-laser beam hybrid welding device can be used for welding positions which cannot be welded in a conventional manner, and a high-reflection and high-thermal conductivity material which cannot be welded by single laser, so that the application field of laser welding is enlarged, particularly a working piece is pre-heated by using a continuous semiconductor laser. The absorption efficiency of a material of the working piece to ND: YAG laser is improved, the welding fusion depth is increased, the welding speed and the welding efficiency are improved, and the occurrence of air vents and cracks in the welding process of working pieces is avoided.

The invention relates to a method for producing a tailored hot-formable semifinished sheet metal product. At least two steel sheets (1, 2') with different degrees of material quality and / or thicknessare joined together by a butt joint by means of laser welding. At least one of the sheets is made of a press-hardened steel and has an aluminum- or aluminum-silicon-based metal coating (1.1, 2.1). According to the invention, the steel sheets (1, 2') are welded to each other with a gap (G) which is delimited by the sheet borders to be welded together and which has an average width (b) of at least 0.15 mm. Filler wire (8) material is introduced into the gap (G) to such a degree that the proportion of the filler wire volume introduced into the gap (G) to the volume of the steel sheet material melted by the laser beam is at least 20%. The method according to the invention does not require the coating to be removed from the edges of the sheet borders to be welded together in advance and thus offers substantial cost advantages.