Laser optic head

FIELD: physics.

SUBSTANCE: laser optic head comprises an outer fixed body (1) and an inner movable body (3) with a nozzle (4). The body (3) is moved by means of a rack (6) mounted on the inner movable body (3) and a pinion shaft (5) mounted on the mechanism bracket (16). The mechanism (16) is fixed to the outer fixed body (1) and is connected to an electric drive. In the lower part of the outer fixed body (1), a capacitive sensor (8) is installed to set and control the size between the nozzle cut and the workpiece (9). At the nozzle outlet, there is a removable nozzle (7) with a narrowing-expanding channel at the outlet. For modes of cutting, welding, punching the holes, a removable nozzle (7) is used, which has a diameter in a narrow section of 0.2±0.02 mm and an expansion angle of 30°. For the mode of cutting metal of 20 mm to 40 mm, a removable nozzle (7) is used which has a diameter in a narrow section of 0.5±0.02 mm and an expansion angle of 15°.

EFFECT: increased accuracy of processing, economy and versatility of the head.

3 cl, 9 dwg



Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to laser hardening of flat billets and can be used for hard-facing of materials. This process comprises application of laser beam to biller surface to get a quenched subsurface layer. Simultaneously, coolant flow is fed to produce unquenched viscous subsurface layer, its depth being controlled by fed coolant.

EFFECT: preset depth of viscous subsurface layer, hence, enhanced properties.

1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to laser welding and may be used in various branches of machine building. Pipe edges to be welded together are subjected to laser beam effects. Argon with temperature of minus 200°C is fed to welding zone to cool down said edges. Note here that in welding the entire case of welding fixture is cooled to minus 200°C by feeding and continuous circulation of liquefied nitrogen in fixture circuit. Laser welding is conducted in continuous laser radiation mode till deep penetration of pipe edges and at continuous translation of the pipe in welding fixture horizontal axis. Pipe laser welding rate is selected subject to time and depth metal penetration under action of laser beam.

EFFECT: higher welding rate, sufficient quality of pipe penetration, homogeneous weld.

1 tbl

FIELD: metallurgy.

SUBSTANCE: fixation of plates to be welded, their compression along the welding line and welding is performed by moving a laser head along a weld joint. Besides, compression along the welding line is performed with compression force of 0.01-1 kg/mm2. Laser welding of steel plates with thickness of 5-10 mm is performed at movement speed of laser head of 1000-2000 mm/min at laser emission power of at least 8 kW and helium blowing of the weld joint on the laser head side, and argon blowing thereof on the opposite side of the weld joint. After that, welded plates are annealed at the temperature of 1040-1110°C during 50-80 minutes.

EFFECT: creation of an economic laser butt welding method of plates from steel with low content of boron, which provides identity of chemical composition of weld metal and metal of the weld joint and improvement of stability of weld joint metal to intercrystalline corrosion.

FIELD: process engineering.

SUBSTANCE: invention relates to laser processing of moving substrate to obtain material separated from said substrate. In substrate processing, high pressure is maintained by the pump from substrate side whereto laser beam is irradiated rather than from opposite side. In substrate processing on both sides irradiated by laser beam guides are used.

EFFECT: material separation by lower forces and without damages.

29 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and machine building and may be used for surface hardening and reconditioning of machine assembly units and parts. Self-fluxing NiCrBSi-system powders are applied on substrate by gas-powder laser deposition to perform annealing at 1000-1075°C for 1-4 hours.

EFFECT: higher heat resistance and wear resistance, longer life at 800-950°C.

2 dwg, 2 tbl, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to gas laser cutting of composite materials. Proposed method comprises feeding laser beam to machined surface and process gas, aligned therewith, collimating laser beam, embedding it in machined article and displacing by preset program in the presence of process fluid. Fluid jet is fed as swirled coaxially with laser beam into cutting thermal effect zone. Proposed device comprises laser cutter case wit focusing lens, union to feed process gas, nozzle, and cylindrical vessel with annular channel to feed process fluid. Said annular channel incorporates hollow tapered adapter with inner surface representing helical grooves to swirl fluid flow.

EFFECT: higher quality of cutting.

4 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: laser beam of short-wave laser 1 is directed to reflecting rotary mirror 13, reflecting mirror 14 and, therefrom, into lens 10 on focusing lens 15, and, via central conical nozzle 5, in pulse mode with amplitude equal to thickness of material being cut, into cutting zone 17. Laser annular beam of long-wave laser 2 is directed to reflecting mirror 13 and, therefrom, to focusing lens 10, wherein beam is reflected by annular mirrors 11, 12 and, besides, directed via central conical nozzle 5 into cutting zone 17. Simultaneously, process gas is fed from gas feed system 8 into annular converging-diverging supersonic nozzle 6 with skewed edge 7 at outlet to effuse therefrom onto material being cut.

EFFECT: required cutting depth and high surface quality.

3 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: device comprises source 3 to form heat feed zone 11 on part surface 10, device 5 to feed welding filler 13 into said zone 11 and device 15 to displace heat source 3 and filler feed device 5 relative to part surface 10. Control unit 17 with control program controls displacement so that welding power and heat feed zone diameter are set to ensure cooling rate of at least 8000 K per second at material crystallisation. Depth of remelting previous layer is set proceeding from the condition of formation of polycrystalline weld seam.

EFFECT: rules out cracks.

14 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: proposed method may be used in nuclear power engineering and other branches of machine building. Proposed method comprises focusing laser beam at material and feeding protective inert gas into cutting zone. Inert gas is fed via nozzle at its outlet pressure of, at least, 3.5·10-5 MPa. Note here that laser beam with wavelength of 1.06-1.07 mcm is used and directed via said nozzle coaxially with its lengthwise axis.

EFFECT: higher efficiency and quality, ruled out metal corrosion.

2 cl, 1 dwg, 2 ex

FIELD: physics.

SUBSTANCE: method involves deposition of particles of a substance from gas phase through local heating of the deposition region with laser radiation. The substance in gas phase is dispersed in form of an aerosol. The deposition region is locally heated with pulsed laser radiation and the aerosol particles are baked onto the substrate. The pulse duration of the laser radiation is not shorter than that when the heat wavelength in particle is greater than the dimension of the particle in the direction of radiation. Material of said particles absorbs laser radiation.

EFFECT: high efficiency of depositing coatings while maintaining high resolution power of the method.

5 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of steel sheet articles from different-depth steel sheet or strips. Billets are welded together along the butt to get the weld (7) composed by edges of steel sheet or strip workpiece. To rule out loss of quenched structure produced by heating to austenitising temperature, at least one edge of sheet or strip (8, 9) is coated before welding with thick fluid or solid powder or aerosol-like matter including at least one component increasing the strength of the weld (10).

EFFECT: higher weld strength.

28 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine for production of polar plates by laser cutting. This machine comprises bed, laser cutting assembly, cutting manipulator to drive laser cutting assembly, control system and at least one strip feeder. Strip feeder comprises manipulator for gripping, means for strip feeding to preset length and strip release means. Cutting and gripping manipulators are arranged at the bed. Means for strip feeding to preset length is arranged between gripping manipulator and strip release means. Control system is connected with cutting manipulator, gripping manipulator and means for strip feeding to preset length.

EFFECT: production of plates for lithium-ion storage batteries and super capacitors by laser technology, higher quality of plates.

10 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to laser plasma welding of metals and device to this end. Invention can be used for welding of such materials as steel and aluminium by combined laser plasma effects. Welding parts are preheated in the weld area by plasma flux. Laser beam is directed to but of welding parts. Produced weld is additionally heated by plasma flux. Plasma flux is shaped to circle while laser radiation is fed via geometrical centre of circular plasma flux to said butt. Device for laser plasma butt welding of metals comprises plasma flux and laser radiation sources. Plasma flux source comprises outer and inner ring electrodes to produce plasma flux located in one plane with their geometrical centres aligned at one point. Laser radiation source can feed laser radiation via said geometrical centre.

EFFECT: intensified welding, lower rate of weld cooling, higher strength of the weld.

2 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates for surface processing to get glossy and dull sections. In compliance with this process, surface pre-coated with first copper ply and second ply including bottom nickel ply and top chromium ply is subjected to selective removal of chromium ply on sections to be frosted. Selective removal is performed by laser displaced above the surface. Note here that laser exposure and power are adjusted to get various texture. Then, ply of noncorrosive metal containing zirconium and chromium is evaporated from vapour phase on said surface.

EFFECT: production of glossy and frosted surface sections.

5 cl

FIELD: physics, optics.

SUBSTANCE: invention relates to a laser beam focusing head for laser cutting, a method and an apparatus for laser cutting of a metal component. The focusing head comprises a collimating lens (13) and a focusing lens (14). The collimating lens (13) and the focusing lens (14) are made of ZnS and have peripheral thickness of at least 5 mm. A deflecting mirror (15) operating at an inclination angle (α) from 40° to 50° is placed between the collimating lens (13) and the focusing lens (14) on the path of the laser beam. The laser cutting apparatus comprises a solid-state laser device (SL) emitting a laser beam with wavelength of 1.06 mcm to 1.10 mcm and power of 0.1 kW to 25 kW, said focusing head and a conveying fibre (CF) connecting the solid-state laser device (SL) and the focusing head.

EFFECT: invention provides a stable focusing position of a laser beam during cutting.

13 cl, 5 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to welding of at least two components 102, 104 of super alloys. In compliance with this process, mail weld 110 if made with the use of the first filler metal arranged between said components 102, 104 and weld surface 112 with the use of second filler metal made over the main weld. Spacer 506 is fitted between said components provided with optional flute 105 made along the surface 114 of weld 102, 104. Filler wire 504 is fed over preset surface 114 or inside said optional flute 105. Two lasers 700, 702 or laser 600 with connected beam splitter 604 produce first and second laser beams 508, 510. Said beams are directed at focus points 5122, 514 spaced apart through preset spacing (509), for example, 0.05-1.5 cm. First laser beam 508 is used for making of the main weld 110 with the help of fist filler metal between components 102, 104. Second laser beam 510 is used for making of the surface weld 112 with the use of second filler metal on the surface of the main weld 110.

EFFECT: perfected method.

9 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of pipes by laser welding. Laser welding comprises emitting of two laser beams along edges at open pipe upper surface. Said laser beams are transmitted via different optical fibre glass and have focused spots of diameters making over 0.3 mm. Said laser beams are emitted so that front laser beam and rear laser beam are inclined to welding direction. Note here that incidence angles are defined relative to direction perpendicular to open pipe top surface. Front laser beam falls on open pipe top surface in welding direction before rear laser beam while the letter falls on open pipe top surface in welding direction after front laser beam. Front laser beam incidence angle is set larger than that of rear laser beam. Gap between front laser beam centre and that of rear laser beam is set at open pipe rear surface equal to 1 mm and more.

EFFECT: higher quality of weld, higher yield.

17 cl, 4 dwg, 3 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: temporary beads 3 and 4 are made on thick 2 and thin 1 parts. The bead 3 height is by 3-4 times higher than thickness of part 1. Height of bead 4 is equal to height of bead 3. Bead 4 thickness is determined by equation S2=(1+Δ)·S1. Beads 3 and 4 contact surface is treated by ultrasound in ethyl alcohol. Parts 1 and 2 are secured in welding fixture. Butt joint gap and beads 3 and 4 shift at least 10% of part 1 thickness are ensured. Laser beam 5 is directed to butt joint of beads 3 and 4.

EFFECT: invention increases weld strength due to rational design of the temporary beads.

3 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: device to manufacture items by layer-by-layer laser agglomeration of powders contains tanks for powder and powder surpluses, located between them module for item forming including table with drive of its vertical movement, device for powder supply to the table from powder tank, and powder discharge to power surpluses tank, optical laser system for agglomeration of the powder nozzles installed above the table for air or inert gas supply on the powder layer, and gas intake installed under the table with possibility of connection with vacuum system. The table is made gas permeable and is equipped with installed on its top surface of the refractory gas permeable plate intended for powder layer arrangement on its surface and agglomeration.

EFFECT: improved quality of obtained items.

1 dwg

FIELD: machine building.

SUBSTANCE: module comprises a guide belt, a movable orbital carriage mounted on the guide belt and able of travelling along it. The carriage includes a longitudinal movement drive and a moving device consisting of a carrying roller system and a gear wheel. A joint monitoring sensor, a welding wire reeling device and a handler are installed on the carriage. The handler consists of two mutually perpendicular linear guides with motors, which can move in respect to each other. The transverse linear guide is equipped by a laser welding head, a wire feeding unit, an arc welding torch, a video camera and a controller.

EFFECT: invention allows for the increase of productivity and efficiency of welding process for fixed ring pipe joints and for the improvement of welded joint quality.

3 cl, 3 dwg

FIELD: systems for cleaning rigid surfaces.

SUBSTANCE: in order to improve quality of cleaning, surface is irradiated by means of space-modulated beam of laser irradiation.

EFFECT: improved quality of cleaning surfaces.

1 cl, 2 dwg