1041 results about "Laser beam welding" patented technology

A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel has a strut assembly that is movable between an unexpanded position and an expanded position. Struts having strut ends at the respective ends form a cage. The strut ends are initially made from linear elastic nitinol, and a series of spot or laser or other types of welds then secure the strut ends in the sleeve assembly. In one approach, the ends of the strut ends are welded to form a tube. In another approach, the strut ends are welded onto a sleeve. The strut ends may optionally have ends that are partial cylinders, and the partial cylinders are welded onto a cylindrical sleeve. Effects from the welding, such as changing linear elastic nitinol to superelastic nitinol, are contained within a heat-effected zone, and do not extend into areas of the structure that typically bend during use.

A method is provided for repairing degraded and / or eroded areas on gas turbine blades and vanes. The method is directed to turbine blades and vanes made of advanced superalloy materials with high elevated-temperature properties. The method uses multiple laser beams to perform steps of preheating the repair area, welding the repair area, and post-welding heating of the repaired area. The method uses an array of two or more lasers to perform the steps of heating, welding, and post-weld heat treatment in nearly simultaneous operation thereby dramatically reducing or eliminating the hot cracking associated with other welding methods used with superalloy materials. The method is further directed to cladding or material buildup of degraded turbine blades where the weld material is the same as the matrix or better superalloy materials.

A method of weld repairing an air-cooled aft frame of a transition piece of a gas turbine engine. The transition piece has an interior surface coated with a ceramic coating. The aft frame has a surface with cooling holes therein and from which cracks have propagated. The method includes removing the transition piece from the engine and, without removing the ceramic coating or the aft frame from the transition piece, weld repairing the cracks by performing a laser beam welding technique that deposits a filler material on the surface but does not close the cooling holes in the surface. The surface of the aft frame can be machined to remove excess filler material prior to re-installing the transition piece in a gas turbine engine.

A method is provided for repairing degraded and / or eroded areas on gas turbine blades and vanes. The method is directed to turbine blades and vanes made of advanced superalloy materials with high elevated-temperature properties. The method uses multiple laser beams to perform steps of preheating the repair area, welding the repair area, and post-welding heating of the repaired area. The method uses an array of two or more lasers to perform the steps of heating, welding, and post-weld heat treatment in nearly simultaneous operation thereby dramatically reducing or eliminating the hot cracking associated with other welding methods used with superalloy materials. The method is further directed to cladding or material buildup of degraded turbine blades where the weld material is the same as the matrix or better superalloy materials.

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.

In an electric power steering apparatus, a metal substrate and connector terminals arranged in a peripheral portion of the metal substrate are electrically connected to each other by metal elements, and conductor layers of the metal substrate and the metal elements are bonded to each other by laser welding, whereby the number of parts and a space for connection can be reduced.

A system and method for laser beam welding at least two adjacent superalloy components involves substantially simultaneous formation of a base weld with a first filler metal placed between the components and cap weld with second filler metal formed over the base weld. A shim is inserted between the components, which may optionally be formed with a groove along the joint surface. A filler wire is fed to a location over the given surface or within the optional groove. Two lasers or a laser and coupled beam splitter supply first and second laser beams that are applied at focal points separated by a predetermined distance (e.g., 0.05-1.5 cm). The first laser beam is used to form a base weld with the first filler metal between the components, and the second laser beam is used to form a cap weld with the second filler metal on top of the base weld.

Compositions and methods for making a three dimensional structure comprising: designing a three-dimensional structure; melting the three-dimensional structure from two or more layers of a metal powder with a high energy electron or laser beam is described herein. The position where the metal is melted into the structure is formed along a layer of metal powder, wherein the location and intensity of the beam that strikes the metal layer is based on the three-dimensional structure and is controlled and directed by a processor. The instant invention comprises a novel dry state sonication step for removing metal powder that is not melted from the three dimensional structure.

Superalloy components, such as service-degraded turbine blades and vanes, are clad by laser beam welding. The welding / cladding path, including cladding application profile, is determined by prior, preferably real time, non-contact 3D dimensional scanning of the component and comparison of the acquired dimensional scan data with specification dimensional data for the component. A welding path for cladding the scanned component to conform its dimensions to the specification dimensional data is determined The laser welding apparatus, preferably in cooperation with a cladding filler material distribution apparatus, executes the welding path to apply the desired cladding profile. In some embodiments a post-weld non-contact 3D dimensional scan of the welded component is performed and the post-weld scan dimensional data are compared with the specification dimensional data. Preferably the welding path and / or cladding profile application are modified in a feedback loop with the pre- and / or post-welding 3D dimensional scanning.

The integrated lead suspension assembly comprises several improvements. An oversized terminating pad for the electrical traces and a smaller adjacent insulation layer on the flexure assembly enable laser solder ball bonding of the pads to the read / write terminal contacts on the slider without clamping operation. Consequently, the tip of the load beam can be made narrow for a structure that provides for head loading and unloading functions, which improves the dynamic performance of the suspension assembly. The flexure assembly is configured such that it requires no permanent bending in its forming process, and any permanent bending required is done to the load beam. The limiter that limits the travel of the flexure assembly is formed on the load beam and it is bent to the functional position only after attachment of the flexure assembly to the load beam. The limiter is configured and positioned at the leading edge side of the slider to optimize the unloading process and to minimize the possibility of disengagement of the limiter and the flexure assembly during high shock environment. Asymmetric backing branches are provided for the read and write traces in the flexure assembly located at the hinge area of the load beam, the widths of which are sized to optimize the dynamic signal performance of the read and write traces without impact on the vertical stiffness of the suspension. Low profile flanges at 30°–60° that bend from the plane of the load beam are provided along the edges of the load beam to optimize bending stiffness and flow induced vibration. Dimples are provided along the load beam to facilitate insertion of a plastic head separation tool.

A method of laser beam welding at least two adjacent superalloy components includes (a) aligning the components along a pair of faying surfaces but without a backing plate; (b) placing a superalloy shim between the faying surfaces; (c) welding the components together using a laser beam causing portions of the superalloy components along the faying surfaces to mix with the superalloy shim; and cooling the components to yield a butt weld between the components.

A laser welding apparatus and method reduce the effect of the fume resulting from a weld. An air injecting nozzle is installed at a laser processing head. The injecting direction of air from the air injecting nozzle is set such that the air flows across a laser beam irradiated from the laser processing head while the air flow avoids direct contact with the laser irradiating point on the work piece.

A fuel fill system includes an outer funnel and one or more components, each formed from a thermoplastic material. The components, which may include a flange, a tube, and a vapor recirculation fitting, are in fluid communication with the outer funnel via welded joints. The welded joints may be formed by at least one of: spin welding, hot plate welding, laser welding, vibration welding, and ultrasonic welding. The plastic to plastic weld provides an electrically conductive, substantially seamless, vapor permeation resistant joint between each of the components and the outer funnel.

The present invention proposes one kind of 3D real-time monitoring device for laser welding and cutting process. The 3D real-time monitoring device can acquire the coaxial infrared waveband and plasma radiation light signal for real-time quality monitoring. Compared with available technology acquiring only one kind of radiation light information, the present invention has the advantage of providing more precise information for the closed-loop control of 3D laser processing.

The invention relates to a laser welding work table, which comprises a pedestal (31) and a positioning seat (14), a drive unit (34) and a hold-down gear (35) which are fixed on the pedestal (31), wherein the positioning seat (14) is provided with a central hole (32) in which an apical ring (13) is arranged; the edge of the central hole (32) is also provided with a plurality of hold-down mechanisms (33) which can press and fix workpieces into the central hole (32); the drive unit (34) can drive the positioning seat (14) to rotate around the center of the central hole (32) of the positioning seat (14), so as to drive the workpieces to be welded to rotate around the center of the positioning seat (14); and the hold-down gear (35) is arranged on the positioning seat (14) and can press down upper surfaces of the workpieces and simultaneously rotate along with the workpieces. The laser welding work table can accurately fix and position the workpieces, can make the workpieces rotate around the center, is convenient to realize high-efficiency laser welding, realizes water circulating cooling of the positioning seat, prevents the workpieces from being heated and deformed, is provided with a swivel base so as to be capable of adjusting the angle of the swivel base and a bottom plate, and is convenient to obtain best laser welding effect.

A superalloy substrate, such as a turbine blade or vane, is fabricated or repaired by laser beam welding to clad one or more layers on the substrate. Laser optical energy is transferred to the welding filler material and underlying substrate to assure filler melting and adequate substrate surface wetting for good fusion. Energy transfer is maintained below a level that jeopardizes substrate thermal degradation. Optical energy transfer to the filler and substrate is maintained uniformly as the laser beam and substrate are moved relative to each other along a translation path by varying the energy transfer rate to compensate for localized substrate topology variations.

The invention discloses a clamp for battery laser welding. The clamp comprises a positioning jig and a clamp body. The positioning jig hollowly forms positioning grooves and clamping positions, wherein the positioning grooves are used for containing battery cores, one end of each positioning groove is opened, and each clamping position is located on the opened side of the corresponding positioning groove and used for containing PCM boards. The clamp body comprises compressing positioning assemblies, a fixing plate, a positioning base, linear driving devices and a mounting plate, wherein the positioning base, the linear driving devices and the mounting plate are fixedly connected with a laser-beam welding machine. The positioning base is provided with a positioning interval used for containing a positioning jig, and the linear driving devices are located between the positioning base and the mounting plate and are provided with output ends which slide up and down. The fixing plate is fixed at the upper end of the mounting plate. Each compressing positioning assembly comprises a mounting base, an elastic piece and a pressing pawl. The mounting bases are arranged on the mounting plate in an up-down sliding mode, the elastic pieces are arranged between the mounting base and the fixing plate, and the pressing pawls are mounted on the mounting base and are provided with butting parts with through holes. In the compressing process of the clamp, only the linear sliding movement is made, positioning is accurate, welding quality and final product performance can be improved, the clamp is divided into two parts, and thus operation is made easier.

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 active agent and a method for carrying out surface treatment on materials to be welded of aluminium and aluminium alloys so as to improve the energy utilization rate of the aluminium and the aluminium alloys, deepen the fusion depth of welding seams and further obtain higher welding quality. The active agent for laser welding consists of a chloride and a fluoride, wherein the mass ratio of the chloride to the fluoride is (1-2): (1-4); the chloride is at least one of lithium chloride, sodium chloride, potassium chloride, zinc chloride, magnesium chloride, aluminium chloride, calcium chloride or tin chloride; and the fluoride is at least one of lithium fluoride, sodium fluoride, magnesium fluoride or calcium fluoride. When the surface treatment is carried out, firstly the fluoride and the chloride are mixed fully and uniformly, water is added to form a supersaturated solution, then the supersaturated solution is coated on the surface of a welded test piece as a coating agent, then drying is carried out, and finally laser welding is carried out under the condition of gas protection.

The present invention relates to a method for interconnecting adjacent expandable pipes by Laser Beam Welding (LBW).

Superalloy components, such as service-degraded turbine blades and vanes, are clad by laser beam welding. The welding / cladding path, including cladding application profile, is determined by prior, preferably real time, non-contact 3D dimensional scanning of the component and comparison of the acquired dimensional scan data with specification dimensional data for the component. A welding path for cladding the scanned component to conform its dimensions to the specification dimensional data is determined. The laser welding apparatus, preferably in cooperation with a cladding filler material distribution apparatus, executes the welding path to apply the desired cladding profile. In some embodiments a post-weld non-contact 3D dimensional scan of the welded component is performed and the post-weld scan dimensional data are compared with the specification dimensional data. Preferably the welding path and / or cladding profile application are modified in a feedback loop with the pre- and / or post-welding 3D dimensional scanning.

A method of welding at least two metal sheets protected by a zinc coating that has a low vaporizing temperature. The metal sheets are placed on top of each other and a head of a welding machine is passed over the sheets. The head of the welding machine is configured such that a laser is positioned in front of a GMAW welding or MIG brazing device. The laser cuts a channel into the metal sheets in order to allow the protective zinc coating to vaporize and escape. The GMAW welder or MIG brazing device then follows the laser and deposits a material that fills the channel to weld the two pieces together.

A welding method and an assembly for performing the method. Articles to be welded are placed together so that faying surfaces thereof face each other, a joint region is defined by the faying surfaces and juxtaposed surfaces of the articles, a shim is between and contacts the faying surfaces, and an edge portion of the shim protrudes from the juxtaposed surfaces. The articles are welded together by projecting onto the joint region a high-powered laser beam that is focused on the juxtaposed surfaces and intentionally unfocused on the edge portion of the shim so that portions of the laser beam are diffracted by the edge portion onto the juxtaposed surfaces. The laser beam and its diffracted portions melt the shim and the faying and juxtaposed surfaces of the articles. Cooling of the articles yields a welded assembly having a weld joint entirely through a through-thickness of the welded assembly.

A new packaging method for a wide range of MEMS for application on both the wafer and device scale. Titanium is used as the packaging material and both silicon and titanium MEMS devices are integrated on to a titanium substrate. A Nd:YAG pulsed laser is used to micro-weld the titanium cap to the substrate. A three-dimensional time dependent model of heat flow during laser beam welding is presented. The heat transfer and parametric design capabilities of COMSOL were employed for this purpose. Model calculations are compared and calibrated with experimental results of pulsed laser welds. The functionality and hermiticity of the proposed packaging was evaluated by packaging a self actuated Veeco Instrument AFM cantilever tip. The experimental measurements show that the resonance frequency and quality factor of the device stay the same before and after packaging and the applied technique has no effect on the device.

The present invention relates to material engineering technology, and is one laser-TIG welding method for magnesium alloy shapes and castings. The laser-TIG welding process combines two kinds of welding techniques, laser welding and TIG welding, and provides the organic matching of two kinds of heat source powers. The laser-TIG welding process is superior to available welding processes in that it can obtain magnesium alloy joint with high welding quality and good shape, jointing strength reaching 95 % of mother material strength, high production efficiency and saving in energy source.

Disclosed is an electric-arc-assisted laser welding-brazing method applicable to dissimilar material butt connection. The method is used for implementing high-quality connection between aluminum / steel dissimilar materials. The method comprises the steps that first, acetone is used for cleaning welded sheets to remove oil stains on the surfaces of the welded sheets, and oxide films on the surface of the aluminum or aluminum alloy sheet through a mechanical abrading method; second, the aluminum or aluminum alloy sheet and the steel sheet are fixed to a welding jig with a forming groove in a butt connection mode, and a connector is made to be located above the forming groove; third, acetone is added in a fluxing agent and evenly-mixed filling powder respectively, and the surface of an aluminum or aluminum alloy welding bead is coated with the mixture formed by the filling agent and acetone and the mixture formed by the filling powder and acetone in sequence after the mixtures are stirred; fourth, a laser beam and an assist electric arc behind the laser beam keep synchronous movement to carry out welding.

An electrical connection inside a semiconductor device is established by lead frames formed of plural conductor plates. The lead frames are disposed three-dimensionally so that the respective weld parts thereof are exposed toward a laser light source used in the laser welding. The laser welding is then performed by irradiating a laser beam. According to the above, welding can be performed readily in a reliable manner. The productivity of the semiconductor device and the manufacturing method of the semiconductor device can be thus enhanced. In addition, because the lead frames have the cooling effect, they have the capability of a heat spreader. It is thus possible to provide a semiconductor device and a manufacturing method of the semiconductor device with high productivity.

The invention relates to a double laser beam welding method for a T-shaped joint. The method comprises the step of continuously welding the whole T-shaped joint by using the double laser beams and is characterized by also comprising the position welding step before the continuously welding step, wherein in the position welding step, two joint seams of the T-shaped joint are subjected to tack welding by the double laser beams, so that positioning welding joints are formed on at least one of the two joint seams at intervals and the welding deformation of the T-shaped joint is reduced. Compared with the welding method which does not adopt the position welding step before the step of synchronously and continuously welding on two sides of the double laser beams, the double laser beam welding method for the T-shaped joint has the advantages of reducing welding deformation caused by synchronously and continuously welding on two sides of the double laser beams to the maximum degree and guaranteeing the accuracy of the welding route in the process of synchronously and continuously welding on two sides of the double laser beams. By the method, the welding quality is guaranteed; welding deformation is reduced; and production efficiency is improved.

The invention relates to a plasma-side-suction negative pressure device for laser welding. The plasma-side-suction negative pressure device can be mounted on any laser welding gun head. A negative pressure chamber device is fixed with the laser welding gun head and can move relative to a workpiece to be welded; and the negative pressure chamber device is arranged above a welding puddle area on the surface of the workpiece to be welded and is used for quickly exhausting, so that local negative pressure lower than the normal atmospheric pressure is generated in a closed chamber fixed in the laser welding gun head, and a negative pressure environment can be formed around a welding puddle. With the adoption of the plasma-side-suction negative pressure device for laser welding, the plasma generation during the process of high-power laser deep penetration welding can be effectively inhibited, and the weld-seam deep-layer air holes caused by a keyhole effect are eliminated. The plasma-side-suction negative pressure device for laser welding has the advantages of no restriction of workpiece size, flexibility and convenience in use, good stability, higher welding quality and increased stability in a welding process.

In a spark plug for an internal combustion engine, a noble metal chip such as an iridium alloy chip is bonded on the tip of a center electrode made of a material such as nickel by laser beam welding. The noble metal chip contains another noble metal such as rhodium having a melting point lower than that of the noble metal chip. By laser welding, a molten bond containing the noble metal melted thereinto from the noble metal chip is formed at the junction of the noble metal chip and the center electrode. Alternatively, the noble metal to be melted into the molten bond may be supplied by a separate noble metal plate. The molten bond thus made has a high bonding strength and a small thermal stress, and thereby durability of the spark plug is improved.