43 results about "Laser brazing" patented technology

A nickel based active brazing material for high temperature furnace and laser brazing of stainless steels, nickel and cobalt based alloys and superalloys, refractory metals and alloys in vacuum and inert gases for manufacturing and repair of turbine engine components and other articles comprising in weight percentage (wt. %) of (4.5-8.5)% Cr, (4.2-6.5)% Ti, (5.0-9.5)% Zr, (3.0-4.5)% Hf, (0.5-1.6)% Ta, (1.0-3.5)% Al, (0.5-1.7)% Si, (0-12.0)% Fe, (0-0.2)% Mo, (0-0.05)% W, and nickel to balance.

The utility model provides a laser brazing tool for synchronously rotating two sides of a round pipe joint. The laser brazing tool comprises a rack, a rotating device, a positioning and supporting device, a brazing lifting device and a polishing device. The rotating device achieves coaxial installation and synchronous rotation of the two round pipes through a left three-jaw chuck and a right three-jaw chuck which are in bilateral symmetry and is driven by a permanent magnet synchronous motor controlled by a PLC. The positioning and supporting device adapts to circular pipes with different diameters through a positioning roller and a roller position adjusting mechanism. The brazing lifting device comprises an annular air injection piece, a high-power laser generator and a brazing wire and provides inert gas protection and laser brazing functions. The grinding device comprises a low-power laser generator and a flexible grinding block which are used for preheating and grinding the surface of the round pipe correspondingly. In addition, the rack is provided with a welding waste liquid collecting table, and the environmental protection property is improved. The tool can achieve automatic welding of the round pipe, improves the welding precision and quality, and is high in adaptability, simple in structure and low in manufacturing cost.

The invention belongs to the technical field of dissimilar metal welding, and particularly relates to a laser welding-brazing method for titanium steel dissimilar metal connection. According to the laser welding-brazing method, the laser is adopted as a welding heat source, and laser welding combining brazing and fusion welding is achieved by comprehensively regulating and controlling the filling material, the laser beam position and welding parameters. By the adoption of the welding mode, metallurgical regulation and control of welding seams can be effectively achieved, generation of brittle intermetallic compounds is restrained, a high-quality welding joint with excellent strength and plasticity is obtained, the tensile strength of the welded joint is 317.6 MPa and reaches 82.71% of that of steel base metal and 75.44% of that of titanium base metal, the joint coefficient is 0.83, equal-strength matching is basically achieved, and the welding quality is improved. The welding problem of the titanium steel dissimilar metal is effectively solved, technical support can be provided for matched use of titanium alloy and traditional steel and iron materials, and development of the transportation tool lightweight technology is further promoted.

The utility model discloses an automatic brazing filler metal pre-coating device for laser brazing. The automatic brazing filler metal pre-coating device comprises a workbench, a first X-axis lead screw sliding table, an electric telescopic rod, a Y-axis lead screw sliding table, a pasty brazing filler metal extrusion device and a brazing filler metal trowelling device. Brazing filler metal trowelling devices are symmetrically arranged on the left side and the right side of the workbench, first X-axis lead screw sliding tables are arranged on the front side and the rear side of the workbench correspondingly, the electric telescopic rods are fixedly installed on the tops of first X-axis lead screw sliding table moving pieces through installation bases, and a Y-axis lead screw sliding table is arranged on the tops of the electric telescopic rods on the two sides; the pasty brazing filler metal extrusion device is fixedly mounted on the Y-axis lead screw sliding table moving part; according to the device, quantitative and fixed-area coating of the paste brazing filler metal on the surface of the base metal can be automatically achieved, inconvenience caused by manual coating is avoided, meanwhile, the quality of follow-up laser welding and the accuracy degree of experiments are guaranteed, and the device is suitable for further application and popularization.

The present application belongs to the field of dissimilar metal laser welding, and particularly relates to a method for improving the gap adaptability of dissimilar metal butt joint laser brazing by alternating magnetic field. By setting the butt joint part of the dissimilar metal test plate with assembly gap suspended at the bottom, applying transverse alternating magnetic field and inert gas protection below it, and setting the laser welding head above the sample and the magnetic field generating device below the sample to remain stationary during the welding process, and the laser beam is offset to the low melting point metal side, the molten low melting point material wets and spreads on the surface of the un-molten high melting point material, and then interface metallurgical bonding occurs to form a brazing joint. The present application improves the assembly gap adaptability of dissimilar metal butt joint laser brazing based on the effect of transverse alternating magnetic field lifting the molten pool, suppresses the generation of aluminum alloy weld side heat cracks and other defects caused by the increase of assembly gap, improves the weld forming, and improves the adaptability of dissimilar metal butt joint laser brazing in engineering.

The present invention belongs to the technical field of laser brazing, and particularly relates to an electromagnetic field-assisted laser brazing method. First, pre-welding cleaning is performed, and then mixed brazing material powder is pre-placed, and the mixed brazing material powder is coated on the groove of a specimen. The dried specimen is clamped between two electromagnetic coils on an electromagnet above a workbench in an argon protection chamber, and the current of a direct current power supply I is clamped at both ends of the weld of the specimen. The current at the weld passes through the electromagnetic coil and the Lorentz force generated is directed downward, so that the brazing material fills the brazing seam downward, and then the argon protection chamber is evacuated and filled with argon, and finally laser brazing is performed. The present invention pre-places the brazing material at the part to be welded, and in the protection of an argon atmosphere, heats and melts the brazing material with a laser heat source, and simultaneously couples a steady-state electric field and a magnetic field to form an electromagnetic composite field. The molten brazing material fills the brazing seam downward under the action of the directional Lorentz force of the electromagnetic field, promotes the flow of the brazing material in the gap, reduces the formation of defects such as pores in the weld, and improves the welding quality.

The application belongs to the technical field of material welding, and particularly relates to a negative pressure laser brazing method for single-sided sealing of a ceramic tube / metal plate. Through the synergistic regulation and design among the surface micro-texture, negative pressure environment and laser heat field regulation during laser brazing, high-reliability connection is realized, the temperature gradient of the connection interface is effectively reduced, and through accurate regulation of parameters, the interface wettability, thermal stress and uniformity of the structure are synergistically improved. In addition, the ceramic tube / metal plate composite obtained by the laser brazing method is suitable for high-temperature and high-pressure environments, and can be applied to the manufacturing of sealing structures of nuclear power equipment, chemical reactors and solid oxide fuel cells.

A laser processing head (50) for directing laser light onto a workpiece (WP), wherein the laser processing head (50) comprises the following: - a collimator (64) arranged in an optical axis of the laser light and configured to convert the laser light into collimated light; - a beam splitter (70) arranged in the optical axis between the collimator and a main output at an angle to the collimated light and having at least two sections arranged on a surface of the beam splitter (70), wherein the at least two sections comprise a peripheral antireflective section (72) configured to allow peripheral light of the collimated light at least partially to pass to the main output (55a), and an inner highly reflective section (74), wherein the peripheral region surrounds the inner region, and wherein the inner highly reflective section (74) has an oval shape such that the angled oval inner highly reflective section (74) reflects a secondary laser beam (SB) having a cylindrical shape towards a focusing lens 76 for a secondary fiber (40); - the main output (55a) which is arranged in optical connection with the beam splitter (70), wherein the main output (55a) is configured to direct at least the first light into a main laser beam onto the workpiece (WP); and - a secondary output (55b) arranged in optical connection with the beam splitter (70), wherein the secondary output (55b) is configured to direct at least the second section into a secondary laser beam alongside the main laser beam and comprises the following: - at least one focusing lens (68) arranged in optical connection with the beam splitter (70) and configured to focus any collimated light transmitted from the beam splitter (70) and falling onto the focusing lens (68); and - at least the secondary fiber (40) which has an input arranged in optical connection with the focusing lens (76) and which has an output arranged in optical connection with the workpiece (WP).

The present application belongs to the technical field of laser brazing, and proposes a welding structure for laser brazing of optical assemblies and a method for using the same, which is used for welding and fixing of optical assemblies. The welding structure comprises optical elements, welding pins, optical element mounting plates, optical assembly welding bottom plates and solder structures. The optical assembly comprises the optical elements and the optical element mounting plates. In use, the solder structure is placed in the recessed structure of the optical element mounting plate, the welding pin is screwed into the threaded hole of the optical element mounting plate until the lower hemisphere structure of the welding pin coincides with the inner spherical surface structure of the solder structure, the welding laser is aligned with the laser irradiation surface of the solder structure, and the optical elements are welded and fixed in sequence. The present application has the advantages of simple structure and strong adaptability. The use of the welding pin can effectively reduce the distance by which the optical assembly deviates from the predetermined position due to the welding stress during the welding process. In addition, the optical assembly can be disassembled without damage by heating the solder structure and unscrewing the welding pin.

The utility model provides a vehicle body seam guiding and positioning mechanism for laser brazing, which relates to the technical field of welding and positioning devices and comprises a base, handrails arranged on two sides of the top of the base, a sliding rail arranged on the top of the base, a sliding seat arranged on the top of the sliding rail, a placing plate arranged on the top of the sliding seat and positioning clamps arranged on two sides of the placing plate. Rubber columns are arranged on the two sides of the base, supporting columns are arranged at the tops of the rubber columns, a motor is arranged at the top of each supporting column, and a laser brazing device is arranged in the center of the bottom of each motor. In this way, the laser brazing device with the top capable of sliding left and right through the sliding groove is matched for multi-directional welding, the welding efficiency is improved, and manpower is reduced.

The application discloses a preparation method of a high-entropy alloy laser brazing single-layer diamond grinding wheel, and comprises the following steps: a grinding wheel steel base material is mechanically processed to obtain a grinding wheel steel base; Cr, Cu, Ni-Cr-B-Si and Ti powders are ball milled to prepare high-entropy alloy powder as a brazing filler metal; a tool forming blank is prepared in the order of the grinding wheel steel base as the bottom layer, the brazing filler metal as the middle layer and diamond abrasive particles as the upper layer; the brazing filler metal is heated to melt by laser in an inert gas environment; after cooling, the diamond abrasive particles are brazed and fixed on the surface of the grinding wheel steel base to obtain the single-layer diamond grinding wheel. After laser brazing, interface reaction between the surface of the diamond abrasive particles and the molten high-entropy alloy occurs, a metal carbide layer which is firmly combined with the surface of the diamond is formed, firm chemical and metallurgical bonding between the diamond and the brazing filler metal is generated, and thus the single-layer diamond grinding wheel is prepared, and the single-layer diamond grinding wheel has the advantages of good wettability of the brazing filler metal to the diamond, high production efficiency and small thermal damage of the diamond.

Device for laser welding and / or laser soldering (100a), comprising a device for guiding a light beam (200a) with a focusing optic (210a, 210b) and a deflecting optic arranged downstream along a propagation direction of the light beam and rotatable about a rotational axis, wherein the deflecting optics are designed to guide the light beam, when driven in a rotating manner, along a circular path perpendicular to the direction of propagation, such that a radius of the weld path (150a, 150b) is smaller than a radius of a circle which the light beam describes when exiting the deflecting optics, and wherein the focusing optics (210a, 210b) are configured to focus the light beam so that it has a focus diameter between 50 µm and 500 µm on the circular path, the deflection optics consist only of a wedge plate (250a, 250b) and no other optical components, wherein the wedge plate (250a, 250b) is formed by two optical elements (260a, 260b, 270a, 270b) and has two planar surfaces as end faces (262a, 272a), wherein the optical elements of the wedge plate have complementary spherical surfaces (264a, 274a) facing each other, one of which spherical surfaces (264a) forms a concave surface of the first optical element (260a, 260b) and the second spherical surface (274a) forms a convex surface of the second optical element (270a, 270b), and the concave surface and the convex surface have the same radius of curvature and are to be shifted relative to each other along the mutually facing spherical surfaces (264a, 274a) such that the planar surfaces (262a, 272a), as surfaces facing away from the respective spherical surface (264a, 274a) of a respective optical element, run at an angle to each other, wherein the optical element (270a, 270b) of the wedge plate (250a, 250b), which is not the first to be hit by the light beam, is adjustable by means of a shaft with worm gear, wherein the upper surface (262a) of the wedge plate (250a, 250b) is installed at an angle to the light beam.

The application discloses a kind of HPb59-1 high-zinc lead brass laser brazing additive repair method and application, belong to high-zinc lead brass brazing additive technical field.The application applies laser brazing additive repair technology to aircraft HPb59-1 high-zinc lead brass damage repair, solves the evaporation of Pb, Zn element in HPb59-1 alloy due to conventional fusion welding repair, which not only harms human health, but also reduces the mechanical properties of welded joint, improves the damage repair quality of aircraft HPb59-1 high-zinc lead brass parts.

The invention belongs to the technical field of metal processing machine tools, particularly relates to a fluctuation type rotating magnetic field device for assisting laser brazing, and solves the technical problems that an existing device is large in size, heavy in weight, high in requirements for operation space and load bearing, high in cost and inflexible in magnetic field direction adjustment. The device comprises an XY direction moving platform, a rotary driving motor, a neodymium iron boron permanent magnet and a permanent magnet supporting assembly, the rotary driving motor and the Y-direction moving platform are installed on the X-direction moving platform, a first bevel gear is installed at the shaft end of the rotary driving motor, a horizontal transmission shaft is installed on a sliding piece of the X-direction moving platform, a second bevel gear is installed on the horizontal transmission shaft, the first bevel gear and the second bevel gear are meshed, and a universal coupling is hinged to the other end of the horizontal transmission shaft. The permanent magnet supporting assembly comprises a permanent magnet supporting platform, a driving rotating shaft, a rotating shaft supporting platform and three sets of electromagnetic telescopic cylinders, the neodymium iron boron permanent magnet is fixed to the permanent magnet supporting platform, and the lower end of the driving rotating shaft is hinged to the universal coupling.

Method for adaptive control of an automated work process by a robot, comprising the following steps: Providing a software program for generating process signals that can be executed by the robot during the automatic operation, including one or more execution commands; Providing a first signal-value channel for at least one control process parameter (20) of the robot, wherein the at least one control process parameter (20) is assigned to a controlled device, wherein the first signal-value channel is subject to a first waiting time (t1); Synchronizing the execution timing of the first signal-value channel with the one or more execution commands by taking into account the first waiting time (t1) in relation to the one or more execution commands; and Execution of the software program to generate the process signals and sending the process signals to the controlled device to implement the synchronized execution timing control of the controlled device in relation to the instructed movement of the robot.

The application discloses a Ti-based medicine core wire material suitable for laser brazing of titanium alloy sheet, which comprises a medicine core and an outer skin, wherein the medicine core elements are prepared according to atomic percentage, and the atomic percentage of the medicine core elements comprises Zr: 20%-45%, Cu: 20%, Ni: 20%, and Cr: 15%-40%, and the total atomic percentage is 100%; the outer skin is a TA1 belt, and the composition of the TA1 belt is H: 0.015%, O: 0.18%, N: 0.05%, C: 0.26%, Fe: 0.2%, and Ti is the balance. The Ti-based medicine core wire material brazing filler metal is suitable for laser brazing connection of the titanium alloy sheet, a solution method for solving the cracking and even scrapping of the connection part of the titanium alloy sheet component in the aerospace field under complex working conditions for a long time is provided, and a preparation method of the Ti-based medicine core wire material brazing filler metal foil is also provided.

The application discloses a kind of laser brazing equipment and method thereof, it is related to laser welding technical field, its technical solutions are: including workbench, workbench is equipped with XYZ axis transfer platform, XYZ axis transfer platform side is fixedly provided with welding machine box, welding head is fixedly arranged at the bottom of welding machine box, the side of welding machine box is equipped with wire pulling mechanism, and the top of workbench is equipped with fixed mechanism;Wire pulling mechanism includes wire reel, and wire reel is arranged in the inside of welding machine box, and welding wire is arranged on the side of wire reel, and sleeve pipe is fixedly arranged at the bottom of welding machine box, and wire pulling shell is fixedly arranged on the side of sleeve pipe, and welding wire penetrates sleeve pipe and wire pulling shell, and wire pulling assembly is arranged in the inside of wire pulling shell, and wire pulling assembly includes two transmission shafts, and the side wall of wire pulling shell is connected by bearing, improves the precision of wire feeding, facilitates welding head to carry out welding, improves traction degree, makes the speed of welding wire leading and welding speed level, makes welding positioning precision improve, improves welding efficiency.

The invention discloses a magnetic latching relay base which is configured and assembled on a 1 / 5 cubic inch balance force type magnetic latching relay, and a connecting piece (22) of a base contact part and a contact piece (4) serving as a conductive transition part of a movable contact spring part and a load leading-out end (5) are fixed through a brazing clamp and are subjected to laser brazing with the load leading-out end (5). The base connecting piece and the movable contact spring are electrically connected with the load leading-out end through laser brazing, the problem that welding flux splashes seriously is effectively solved, it is guaranteed that the welding position is attractive, the welding quality is high, the consistency is good, the welding area is large, the resistance value is small, and the welding efficiency is high.

The invention discloses a Ti-based flux-cored wire suitable for titanium alloy sheet laser brazing, the Ti-based flux-cored wire comprises a flux core and an outer skin, the flux core is prepared according to atomic percent and comprises 20%-45% of Zr, 20% of Cu, 20% of Ni and 15%-40% of Cr, and the total atomic percent is 100%; and the outer skin is a TA1 belt and comprises the following components in percentage by weight: 0.015% of H, 0.18% of O, 0.05% of N, 0.26% of C, 0.2% of Fe and the balance of Ti. The Ti-based flux-cored wire brazing filler metal is suitable for laser brazing connection of titanium alloy sheets, a solution is provided for solving the problem that the joints of titanium alloy sheet components in the aerospace field are cracked and even scrapped due to long-time use under complex working conditions, and a preparation method of the Ti-based flux-cored wire brazing filler metal foil is further provided.

The present application relates to a kind of multifunctional self-adaptive press bonding device for electric field coupling laser brazing, it includes workbench, at least two elastic link mechanisms being set on the workbench, slippable installation in the swing end of the elastic link mechanism and be locked on the elastic link mechanism by fastener on the conductive rod, and soft copper pressure ring being installed on the conductive rod by rotating pair;Wherein, the workbench is provided with the insulating clamping site for installing workpiece, the at least two elastic link mechanisms are arranged at intervals around insulating clamping site, the soft copper pressure ring is provided with several flat parts being arranged relative to workpiece end face, and multiple round parts being arranged relative to workpiece flange and / or recess.The present application is suitable for the scene of small batch laser processing of various kinds in laboratory, with the advantages of meeting the comprehensive needs of electric field coupling laser brazing to conductive stability, topography adaptability, stress buffer for brittle material and operation convenience.

The invention belongs to the technical field of laser brazing, and particularly relates to an electromagnetic field-assisted laser brazing method, which comprises the following steps of: firstly, cleaning before welding, then presetting mixed brazing filler metal powder, coating the mixed brazing filler metal powder in a groove of a test piece, clamping the dried test piece between two electromagnetic coils on an electromagnet above an argon shield cabin workbench, and then, carrying out electromagnetic field-assisted laser brazing. A current clamp of a direct-current power source I is clamped at the two ends of a welding seam of a test piece, the direction of Lorentz force generated when current at the position of the welding seam penetrates through an electromagnetic coil is downward, so that the brazing filler metal is downwards filled into the brazing seam, then an argon protection bin is vacuumized and filled with argon, and finally laser brazing is conducted. A laser heat source is used for heating and melting brazing filler metal, meanwhile, a steady-state electric field and a steady-state magnetic field are coupled to form an electromagnetic composite field, the brazing filler metal in the molten state downwards fills a brazing seam under the action of directional Lorentz force of the electromagnetic field, flowing of the brazing filler metal in gaps is promoted, formation of air holes and other defects in the brazing seam is reduced, and the welding quality is improved.

The invention discloses a laser-brazing-pressure multi-composite preparation method of a dissimilar metal composite plate. The method comprises the following steps: firstly, cleaning a to-be-composited surface of the dissimilar metal plate; then a preset brazing filler metal layer is formed on the surface of one plate through cold spraying; then, the back faces of the to-be-compounded faces of the two metal plates are precisely preheated to the preset temperature through laser beams; the two preheated metal plates are conveyed to a first set of rolling wheels to be rolled for the first time, melting and wetting of brazing filler metal are achieved, and brazing connection is formed; then the composite board is placed in a heat preservation chamber to be subjected to heat preservation treatment, and the interface metallurgical reaction is further promoted; and finally, the composite board subjected to heat preservation is rolled for the second time, and pressure welding connection is completed. Through the synergistic effect of laser-assisted brazing and laser preheating pressure welding, metallurgical bonding and plastic bonding between dissimilar metal plates are compounded, the interface bonding strength is remarkably improved, meanwhile, the needed rolling pressure is reduced, and the method is particularly suitable for efficient and high-quality compounding of copper / aluminum, steel / aluminum and other thin plates.

The invention relates to a robot laser brazing system, and belongs to the technical field of brazing, the robot laser brazing system comprises a control module, a welding module, a detection module and a cooling module, the control module is electrically connected with the welding module, the detection module and the cooling module, and the welding module moves in the axial direction of a brazing wire under the instruction of the control module and emits laser to heat the brazing wire; the cooling module is used for moving in the axial direction of a brazing wire under an instruction of the control module and cooling a brazed part after welding is completed, the detection module is used for detecting the brazing length in the direction of the brazing wire and uploading length data to the control module, and the control module reduces the power of the cooling module when the length exceeds a threshold value.

This invention relates to a laser brazing method for a Coriolis mass flow meter. The laser brazing method includes the following steps: mixing nickel-based brazing filler powder and a binder to obtain a paste-like brazing filler; applying the paste-like brazing filler to the gaps between the measuring tube and the distributor, and between the measuring tube and the flange, respectively, to obtain an assembly; assembling the assembly into a special tooling and performing laser brazing to obtain a welded assembly; and performing vacuum heat treatment on the welded assembly to obtain the Coriolis mass flow meter. This invention first applies a paste-like brazing filler to the gaps between the measuring tube and the distributor, and between the measuring tube and the flange, respectively, to obtain an assembly. Then, the assembly is sequentially subjected to laser brazing and vacuum heat treatment. This invention can achieve a low-stress, high-strength, and high-airtightness connection between the measuring tube and the distributor, and between the measuring tube and the flange, ultimately improving the measurement accuracy of the Coriolis mass flow meter.

The invention discloses a laser brazing process method with a lap joint angle and a galvanized sheet laser brazing process method, and relates to the field of laser brazing, and the laser brazing process method comprises the steps that an upper to-be-welded component is in lap joint with a lower to-be-welded component and is fixed, an inner lap joint area and an outer lap joint area are formed between the lower to-be-welded component and the upper to-be-welded component, and the angle of the inner lap joint area is 15-45 degrees; setting parameters of a laser brazing process; and according to the parameters of the laser brazing process, laser brazing is conducted on the welding seam of the outer lap joint area in the length direction of the welding seam of the outer lap joint area, so that welding with the lap joint angle of the upper to-be-welded component and the lower to-be-welded component is achieved. The angle lap joint mode is adopted, hemming is not needed, materials needed for hemming are saved, and the welding speed, the welding quality and the welding efficiency are improved.

This invention belongs to the field of dissimilar metal welding and relates to a laser welding process for aluminum-copper dissimilar metals. The welding process includes: preparing a first microstructure on the upper surface of a copper plate in the area to be welded; preparing a second microstructure on the lower surface of the copper plate in the overlapping area; then stacking the copper plate onto an aluminum plate, with the second microstructure of the copper plate overlapping the aluminum plate; and performing laser brazing under a protective atmosphere, with the laser beam focused on the first microstructure of the copper plate and welded along a predetermined path. This process, through the pretreatment of differentiated microstructures on the upper and lower surfaces of the copper plate, simultaneously achieves high laser absorption, low heat input, controllable interface, and mechanical anchoring, overcoming the core challenges of high reflectivity, thick brittle phases, and low joint strength in copper-aluminum laser welding, resulting in a high-strength, highly stable, and low-defect copper-aluminum dissimilar metal joint.

The utility model discloses a retaining mechanism suitable for a wire feeding device and the wire feeding device comprising the retaining mechanism, which belong to the field of laser welding equipment and comprise a shell and a cover plate, and an accommodating cavity capable of accommodating two retaining units is formed between the shell and the cover plate. By means of the two welding wire holes in the shell and the combined arrangement of the pressing wheels, the ratchet wheels, the ratchet wheel claws, the first floating blocks, the second floating blocks and the corresponding pressing pieces in the two retaining units, welding wires can be accurately fed under clamping rotation of the two pressing wheels, rotation of the ratchet wheels is accurately locked through the ratchet wheel claws when the two pressing wheels rotate reversely, and therefore retaining operation of the welding wires is achieved. The retaining mechanism suitable for the wire feeding device is compact in structure, convenient and fast to set and use, capable of guaranteeing accurate feeding of the welding wires and effectively avoiding retreating of the welding wires at the same time, further improves feeding accuracy of the welding wires at the position to be welded, improves quality and precision of laser brazing, and has good practical value.

The application discloses a laser brazing method and system for vertical welding position, comprising determining the vertical welding angle of the welding seam of the workpiece to be welded; according to the preset angle interval to which the vertical welding angle belongs, selecting the corresponding laser brazing process parameter combination, wherein the process parameters at least include laser power, wire feeding speed and laser spot parameters, and the process parameter combinations corresponding to different angle intervals are different; and using the selected process parameter combination to perform laser brazing on the workpiece to be welded. Through the establishment of the dynamic matching relationship between the vertical welding angle and the laser brazing process parameters, high-quality and automatic vertical welding at any angle is realized, and the technical difficulties of poor brazing material flow and poor parameter adaptability are effectively solved.

The present application relates to a kind of laser brazing system and laser brazing method, the first workpiece and second workpiece of lap joint form inner corner welding area and weld path, laser outputs laser beam to be irradiated to inner corner welding area, wire feeder outputs brazing filler wire, laser beam is irradiated to the brazing filler wire that is not continuously output in inner corner welding area, and brazing filler wire is fused covering and fills inner corner welding area, weld joint and wire feeder move along weld path to complete welding, the present application uses brazing filler wire in the inner corner area of workpiece splicing to carry out laser brazing, only brazing filler is melted in brazing process, and matched workpiece is only heated, brazing filler is melted and flows into the gap between workpiece and is combined with workpiece surface, reduce the thermal stress of workpiece, improve the problem of workpiece deformation in welding;Meanwhile, using the way of inner corner welding, brazing filler wire is filled into the right angle inner side area formed after workpiece splicing, avoid workpiece to be welded through.

A laser brazing and welding system is disclosed and includes: a laser; a first cutting tool including a first cutting tip; and a control module. The control module is configured to control the laser to laser braze or laser weld two parts; and control ultrasonic vibration of the first cutting tip to remove one or more layers from at least one of the two parts prior to or subsequent to the laser brazing or laser welding of the two parts.