110results about "Laser beam welding apparatus" patented technology

A laser processing apparatus including a laser beam branching mechanism provided between a laser oscillator and a focusing unit. The laser beam branching mechanism includes a spread angle adjusting unit for adjusting the spread angle of a laser beam and a branching unit for branching the laser beam into a plurality of laser beams. The branching unit includes a half-wave plate, a first polarization beam splitter for separating the laser beam into P polarized light and S polarized light, a first mirror for reflecting the P polarized light, a second mirror for reflecting the S polarized light, and a second polarization beam splitter for leading the P polarized light reflected by the first mirror and the S polarized light reflected by the second mirror to different optical paths extending in the same direction.

The invention discloses an FPC (Flexible Printed Circuit) laser cutting device, consisting of a laser focus scanning system, a control system and a vacuum platform system. The cutting device of the invention improves the FPC formation accuracy and saves processing time and cost.

A hybrid welding system including a hybrid welding apparatus and method of welding are provided. The hybrid welding apparatus includes a laser, an electric arc welder with a non-consumable electrode and a wire feeding device. The electric arc welder provides an electric arc without feeding a welding wire. The wire feeding device is arranged and disposed to feed a wire to a treatment area, which is located between the projections of laser beam and the electric arc. The laser and the electric arc welder are arranged and disposed to direct energy toward at least two adjacent components to form a common molten pool. The wire is fed by the wire feeding device into the common molten pool created by the laser and the electric arc.

The invention relates to the technical field of laser surface micro modeling, in particular to a laser micromachining device for the inner surface of an engine cylinder and a machining method of the laser micromachining device. An object machined by the laser micromachining device is an engine cylinder body; because the machined objects have irregular shapes, larger size and larger mass, a machining scheme that a workpiece is used for fixation and a laser head not only rotates but also takes a linear motion up and down is adopted. Through adopting the laser micromachining device disclosed by the invention, laser beams are output from an inner light path of a laser, pass through an outer light path system and then are focused by a focusing lens inside the laser head and then reflected to the machining surface of a workpiece through a total reflection mirror; and the laser outputs a single laser pulse at specified time on a specified machining point by dint of the coordination and the interaction of a numerical control system on the motion control of various axis of a work table and the single pulse output control of the laser, and therefore the laser micromachining of the surface of the workpiece is realized.

Provided is a method for preparing a two-dimensional metallic photonic crystal structure in large area through femtosecond laser direct writing. The invention provides a method and experiment device for preparing the periodically-distributed two-dimensional photonic crystal structure with the feature size being the sub-micron dimension in one step in the large area by focusing identical-wavelength double-pulse femtosecond laser on the surface of metal through a plano-convex cylindrical lens, and the identical-wavelength double-pulse femtosecond laser is obtained based on the spectrophotometry of birefringent crystals and has the features of collinear transmission, cross polarization and picosecond time delay. Two-dimensional periodic structure patterns can be effectively regulated and controlled by changing the energy and the number of pulses of input laser, the thicknesses and the azimuth angles of the birefringent crystals and the like. Through the combined design of different linear polarization directions and the variable time delay feature of two femtosecond laser pulses and focusing of the cylindrical lens, preparation of the two-dimensional metallic photonic crystal structure within the large area is achieved conveniently and quickly. The novel preparation method adopting the double-pulse femtosecond laser with cross polarization and variable time delay has potential important applications in the field of material micro-nano processing and preparation.

The invention relates to the field of rail transportation and machinery manufacturing, and particularly to a composite welding method of a pillow beam, the pillow beam and a rail vehicle with the pillow beam. The method comprises the following steps that laser-MAG composite welding is used for welding the pillow beam of the stainless steel material, and inserted-connected structures of rib plates are optimized; during manufacturing, the rib plates are preassembled and welded to form a rib plate assembly, then the whole structure is welded, so that the pillow beam can adopt to the stainless steel material to replace weathering resistant steel material in whole, the lightweightening of the pillow beam is achieved, and the corrosion resistance of the pillow beam is improved; through the welding modes of inserting connection and corner connection, and a to-be-welded welding seam is placed on the outer surface of a box type structure to adapt to a technology of single-face welding double-face forming of the laser-MAG composite welding; and self-restraint of pillow beam welding is achieved through the self-stiffness of the inserted-connected structures, the advantages of the laser-MAG composite welding of deep welding, low heat input, small welding deformation and good gap adaptability are played, a manufacturing technology without adjustment and repair of the stainless steel pillow beam is achieved, so that the manufacturing and processing efficiency of the rail vehicle are improved, and production cost is reduced.

The invention discloses a laser precision de-weight system. The system comprises a laser light path transmission unit, a work field, a laser circuit control unit, a focusing adjustment device and a photographic device, and the laser light path transmission unit transmits high-energy density laser to the work field; the laser circuit control unit comprises an upper computer, a master control circuit, a laser control circuit, an image acquisition card and a motor driver; the master control circuit sends direction and pulse instructions received from the upper computer into the motor driver, the motor driver sends direction and pulse signals to the focusing adjustment device, the position movement of the laser light path transmission unit is controlled, and the laser focal position is further controlled accurately. According to the laser precision de-weight system and method, the traditional electric drill de-weight balancing mode is replaced with the laser de-weight mode, defects that the traditional balancing mode is poor in location precision and low in de-weight precision are made up, the traditional complex de-weight process is simplified, a rotor does not need to be mounted and clamped multiple times, and the balancing efficiency of the rotor is improved.

The invention is to a device and method, for cutting a can blank in which case an end section of the can blank is severed. The can blank is moved by means of a conveyor arrangement at a constant speed about a first axis of rotation. Preferably, a laser beam is used as the cutting means. A deflecting arrangement deflects the laser beam to a focal point where the side surface of the can blank is located. Due the rotation of the can blank about its longitudinal axis, the axial end section of said can blank is severed. The focal point of the laser beam does not change relative to the longitudinal axis of the can blank during the laser cutting operation.

The invention discloses a multi-wavelength femtosecond laser scanning type etching method for a printed circuit board. According to the multi-wavelength femtosecond laser scanning type etching method for the printed circuit board, a femtosecond laser device provided with a frequency doubling module is used as a laser source, and the femtosecond laser device can emit laser beams with different wavelengths so as to etch different layers, made of different materials, on the printed circuit board correspondingly; etching of all the layers of the printed circuit board can be completed on the same station, and machining errors caused by repeated positioning are avoided; meanwhile, more refined line-width etching can also be achieved, so that the printed circuit board is made smaller, lighter and thinner; machining is convenient, and the machining precision and quality are excellent.

The present invention generally relates to a laser processing systems for thermally processing substrates. The laser processing systems include a shield disposed between an energy source of the laser processing system and a substrate which is to be thermally processed. The shield includes an optically transparent window disposed adjacent to a cavity within the shield. The optically transparent window allows annealing energy to pass therethrough and to illuminate the substrate. The shield also includes one or more gas inlets and one or more gas outlets for introducing and removing a purge gas from the cavity within the shield. The purge gas is utilized to remove volatized or ablated components during thermal processing, and to provide a gas of predetermined composition, such as oxygen-free, to the thermally processed area.

The invention discloses a laser welding method of a CoCrCuFeNi high-entropy alloy. The laser welding method of the CoCrCuFeNi high-entropy alloy is characterized in that an alloy plate is provided with a V-shaped groove, the surface of the welded groove alloy is ultrasonically cleaned for 30 minutes by acetone, then the groove surface is coated with TiO metal slurry for the first time, and after natural drying, the TiO metal slurry arranged on the groove in a coating mode is subjected to laser cladding; and secondary coating of the TiO metal slurry is carried out, after natural drying is carried out, laser welding is carried out, and welding is completed. The welding method can better solve the crack problem in the welding process and improve the welding quality.

The invention discloses a rotary electric field and magnetic field synchronously assisted laser welding device and method and belongs to the field of laser welding. The welding device comprises an electricity and magnet regulating device and a positioning and clamping tooling. Supporting columns and rotary air cylinders in the positioning and clamping tooling are mounted on a bottom plate. An electric field generation bottom plate is mounted on the supporting columns. Press blocks are mounted on the rotary air cylinders correspondingly. Neodymium iron boron permanent magnets in the electricityand magnet regulating device are fastened to a magnetic field regulating disc. Insulation sleeves, a welding laser head and the magnetic field regulating disc are mounted on a direct drive motor. Thedirect drive motor is mounted on a main shaft. The two poles of an electric field power source are connected to the electric field generation bottom plate and the welding laser head correspondingly.By means of the device and method provided by the invention, easy, convenient and fast regulation of a rotary magnetic field and a steady electric field can be achieved, continuous regulation of the intensity can be achieved, synchronous movement of the electric field and the magnetic field along with welding laser beams is guaranteed, and therefore, the forming quality of laser welding joints isimproved by setting the reasonable laser technological parameters including the power, the focal length, the defocusing amount, the helium protective gas flow rate and the like.

A laser woodworking machine for cutting wood is disclosed. The machine includes a laser cutting head having two sections structurally configured to include sensors for measurements of depth and of reflected frequencies, a laser unit for supplying power to the laser cutting head, a cabinet enclosure for housing the laser unit and including a table surface, a radial arm supported by a column secured to the inside rear portion of the cabinet enclosure and including a pair of radial supports extending perpendicularly from opposite sides of the column and parallel to each other, and a glider carriage secured to the radial supports and including two substantially flat surfaces above and below the radial supports so that the glider carriage slides along the radial supports via sleeves, the glider carriage further comprising support for the laser cutting head so that the laser cutting head is moveable along the radial arm.

The invention provides an adjustable magnetic field coupling and ultrasonic-assisted laser additive manufacturing and monitoring device. The device comprises a laser additive manufacturing system, a substrate, a magnetic field coupling assisted device and an ultrasonic-assisted unit. The substrate is mounted on an experiment support table. The laser additive manufacturing system is used for additive machining on the substrate. The magnetic field coupling assisted device is mounted nearby the substrate and is used for generating a magnetic field nearby the substrate. The ultrasonic-assisted unit is mounted at the bottom of the substrate and is used for generating ultrasonic vibration. The magnetic field coupling assisted device comprises a transverse magnetic field assisted unit and an axial magnetic field assisted unit. The axial magnetic field assisted unit is arranged nearby the substrate and is coaxial with a laser nozzle of the laser additive manufacturing system. The transverse magnetic field assisted unit is arranged nearby the substrate. By means of the device, the laser additive manufacturing machining quality and machining efficiency can be improved, and the shape of a molten pool, the height of a deposition layer and real-time change conditions can be monitored through a mobile monitoring device.

The invention discloses a method and a device for controlling laser welding seam holes. The method comprises the steps as follows: during the laser welding, adopting a gas suction manner to pump out steam inside a keyhole and keeping the keyhole clear. The device comprises a set of gas suction device, wherein the gas suction device is connected with a gas pipe through a pipeline when working, and fixed on a laser head; and a suction nozzle of the gas pipe is aligned above a welding seam. The method and the device can effectively solve the hole problem during the laser deep penetration welding process. The method can be applied to laser welding for different materials, different plate thicknesses, and different connector forms, and particularly has a good effect on controlling the holes in the thick plates, sandwich plates and surface coating plates. The device is simple and feasible, and low in cost. In a word, the method and the device can be conveniently applied to the production and play an excellent effect by only well adjusting the relative location of the suction nozzle of the gas pipe and the welding seam.

The invention relates to a system for carrying out picopulse laser processing by mixed wavelength and flattened Gaussian beams, which consists of a picosecond laser light source, a frequency doubling device, a reflexibie reflecting mirror group, a non-spherical surface shaping lens group, a beam expanding system, a reflecting mirror, a focusing mirror and a control device, wherein the non-spherical surface shaping lens group is used for shaping ordinary Gaussian beams into flattened Gaussian beams, and the movement of the reflecting mirror can be controlled. The laser processing system can effectively realize the flattened Gaussian beam processing under the condition of picosecond laser, and the flattening processing is carried out on the workpiece surface. In addition, the precise control technology is adopted, the flattened processing range can be effectively improved, and the wide-range flattening processing is realized.

The invention provides a device and method for conducting superfast laser machining of an air film hole in a water jet environment. The device comprises a three-shaft moving workbench system, a superfast laser device, a water jet circulating device and a control system. A to-be-machined sample is fixed into a water container through a specific clamping device. The water container is fixed to a three-shaft moving workbench and connected with a water tank through a drainage pipe. Medium water is pumped out of the water tank through a water pump and flows through a water injection pipe and onto the surface of the to-be-machined sample through a water jet nozzle. Laser transmitted by the superfast laser device penetrates a water jet film and is focused onto the surface of the to-be-machined sample for machining. By means of the device and method, the advantages of traditional air and underwater laser perforating are combined; machining efficiency of superfast laser perforating is guaranteed, and microcracks on the surface of the to-be-machined sample and the inner walls of micro-holes are reduced; accumulated slag and a recasting layer are eliminated; and the geometrical morphology precision of the sample is improved.

A hand-held laser-welding wand includes a gas lens assembly that develops an inert gas atmosphere around a weld pool. The lens assembly additionally reflects laser light and thermal radiation that is reflected off a work piece surface away from the hand of a user of the hand-held laser welding wand.

The invention provides a non-sticky metal surface and a preparation method thereof. The method comprises the following steps: S1, irradiating the clean metal surface by adopting pulse laser, and etching a nano-scale or micron-scale micro-nano structure used for achieving the super-lyophobic characteristic or the lyophobic characteristic on the metal surface; and S2, cleaning and spraying the metal surface of the micro-nano structure ablated with a low-surface-energy coating. According to the non-sticky metal surface and the preparation method thereof, the micro-nano structure is ablated on the metal surface through the pulse laser, the metal surface of the micro-nano structure is sprayed with the low-surface-energy coating, so that the metal surface has the super-lyophobic characteristic or the lyophobic characteristic, the effect of being not sticky to viscous beverages such as milk and yoghourt and dairy products can be achieved, the non-sticky performance is lasting, and the non-sticky metal surface can be reused.

To prevent poor quality of weld in a welding process for a thick material or for welding a gap, the laser welding apparatus has granular flux (3) supplied to a side of the base material (W) opposite to the side where a laser beam is directed and a pressing member (5) that presses the granular flux onto the base material (W) upon receiving fluid therein. Either the flux prevents the laser beam that coming through the base material (W) from penetrating the flux or the thickness of molten flux is selected so that the laser beam coming through the base material (W) does not penetrate the molten flux.

The embodiment of the invention discloses a welding line positioning method for positioning the butt joint position between welding workpieces. The welding line positioning method comprises the stepsthat an industrial camera receives structured light reflected through laser beam irradiation at the butt joint position, and an image is formed; the image is processed, and a structured light stripe framework composed of single pixels is obtained; according to the structured light stripe framework, feature points of the butt joint position area are extracted from the image, and coordinates of thebutt joint position in the image are obtained; and deflection amount calculation is conducted on the butt joint position coordinates in the image, and the actual coordinates of the butt joint positionare obtained. Through the above manner and the implementing manner, the problem that in the prior art, positioning of the butt joint position of the middle of a folded welding workpiece is inaccurateis solved; and through the positioning method, the positioning precision is improved, the later welding operation is facilitated, and the welding quality is improved.