35 results about "Laser peening" patented technology

A composite forming method and device combining electric pulse creep aging with laser peening are provided. The method includes modeling a ribbed integral panel, simulating a creep forming process of the panel, and determining and marking localized difficult-to-deform areas. The panel is then pre-bent into shape, and the localized difficult-to-deform areas are performed a laser shock strengthening treatment. Electric pulse heating treatment is performed on the panel and creep aging forming is started. Whether an accuracy of the component surface meets a target accuracy is determined by comparing the scanned component surface with a target surface. For areas that do not meet the target accuracy, a secondary laser shock strengthening treatment is applied. The accuracy of the component surface is repeatedly determined until it meets the target accuracy. The present application improves a forming efficiency of complex curvature components.

A cam lobe for a camshaft wherein the cam lobe includes a cam lobe body having a base circle portion with a base circle outer perimeter adjacent a nose portion with a nose outer perimeter. The cam lobe body has a width that spans across an outer perimeter surface of the cam lobe body. The outer perimeter surface includes a laser peened portion and a non-laser peened portion. The laser peened portion can have various configurations and amount of surface densities. The laser peened portion includes a gradual transition of a laser peened surface. The laser peened portion includes a fade or taper on ends or sides towards a lobe centerline such that a width or a length of the laser peened portion is narrowed or eliminated at the lobe centerline.

The invention provides a method for improving the corrosion fatigue performance of aluminum and / or magnesium alloy by combining laser peening with peak aging and an aluminum and / or magnesium alloy finished product. The method comprises the following steps: S1, carrying out solution treatment on to-be-treated aluminum and / or magnesium alloy; s2, the aluminum and / or magnesium alloy subjected to solution treatment is subjected to laser shot peening treatment; and S3, the aluminum and / or magnesium alloy subjected to laser peening treatment is subjected to peak aging treatment. According to the method, the initial nanometer precipitated phase can be dissolved through the solid solution treatment to form a single-phase supersaturated solid solution, dislocation pinning can be effectively promoted through the laser shot peening treatment, more and more stable gradient dislocation structures are reserved in the subsequent peak value aging process of the aluminum and / or magnesium alloy, power is provided for nucleation and growth of the nanometer precipitated phase, and the mechanical property of the aluminum and / or magnesium alloy is improved. And a surface layer overaging state-core peak aging state continuous transition structure is constructed in combination with subsequent peak aging treatment, and the continuous transition structure endows the aluminum and / or magnesium alloy with corrosion fatigue resistance and high strength characteristics.

The application provides a laser shot forming system and method for measuring and planning integration, comprising a laser scanning forming module, an in-situ measurement module and a process planning module; the in-situ measurement module is used for measuring the geometric surface profile of a forming workpiece in-situ, and transmitting the surface profile data to the process planning module; the process planning module calculates the deviation from a target surface profile according to the geometric surface profile obtained by the in-situ measurement module, and plans a process scheme for laser shot forming; and the laser scanning forming module realizes laser shot forming of the workpiece according to the planned process scheme for laser shot forming. The system and method form a closed-loop process flow of in-situ measurement, process planning and laser shot forming, and realize the integrated laser shot precise forming of a large workpiece in the mode of "measurement-planning-forming".

The invention discloses a repair process parameter determination method based on laser peening and cladding compounding, and relates to the technical field of laser machining.The method comprises the steps that firstly, a laser peening process is used for presetting residual compressive stress on the surface of a notch of a damaged part, refining grains and regulating and controlling the surface roughness, and therefore feature gradient distribution after laser cladding repair is improved; the process parameters of the method are jointly determined by parameters such as residual stress, grain size and surface roughness, the strength and fatigue life of the joint surface of the repaired part can be accurately improved, and the problem of repair failure caused by single laser cladding or non-standard selected values of the process parameters is avoided.

This application discloses a composite shot peening strengthening method for aerospace load-bearing structural components. The method includes dividing the shape-dependent regions or areas with high tensile stress distribution of the aerospace load-bearing structural components into regions and designing composite shot peening paths; designing process parameters for CNC mechanical microparticle shot peening and laser shot peening; performing CNC mechanical microparticle shot peening and laser shot peening; and finally, inspecting the shot peening strengthening quality of the aerospace load-bearing structural components. This application provides a composite shot peening strengthening method for aerospace load-bearing structural components, which can achieve composite shot peening strengthening of aerospace load-bearing structural components, increasing the residual compressive stress layer on the surface of the structural components while reducing surface roughness, effectively and quickly realizing composite shot peening strengthening of load-bearing structural components.

The present invention addresses a problem in which a metal is easily corroded by rust when water is used as a plasma confinement layer in a laser peening method utilized as a metal surface modification method.　This laser processing method comprises a step of applying or affixing a gel-like substance to a processing region of an object to be processed, and a step of repeatedly irradiating the processing region with a laser. Because the laser processing method allows use of a gel-like substance containing no water as the plasma confinement layer, corrosion of the metal, which is the object to be processed, due to rust can be avoided. The gel-like substance is suitably used as a physical gel.

A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.

The invention discloses a combined machining method and system based on water jet and laser dual-mode coupling. The method comprises the following steps: generating a stable high-pressure water jet; injecting a pulse laser beam into the water jet in a coupling manner, and conducting the pulse laser beam to the surface of a workpiece by using a total internal reflection principle; and laser parameters are controlled, so that double functions of a light guide medium and a restraint layer are realized at the same time by utilizing the water jet under the same or time-sequence-divided pulse action, and integrated operation of water-guided laser precision machining and laser shock peening is implemented on a workpiece. The system comprises a laser generating device, a water jet generating device, a light path coupling device, a monitoring control unit and a multi-axis motion platform. The problems of low efficiency, poor precision consistency and the like caused by separation of water-jet guided laser precision machining and laser shot peening strengthening procedures in the prior art are solved, and high-precision and high-efficiency water-jet guided laser machining and surface laser shot peening strengthening on complex parts in a single system are achieved.

The invention relates to the technical field of machining strengthening, in particular to multi-laser-beam cooperative spline shaft quenching, shot blasting and polishing integrated machining equipment and method, and the equipment comprises a workbench, and a workpiece fixing clamp, a laser quenching assembly, a laser shot blasting assembly, a laser polishing assembly and a laser power supply which are arranged on the workbench; the workpiece fixing clamp is used for clamping and positioning a workpiece to be machined. The laser quenching assembly is used for carrying out laser quenching processing on the workpiece; the laser shot peening assembly is used for performing laser shot peening processing on the workpiece; the laser polishing assembly is used for conducting laser polishing machining on the workpiece. According to the method, intelligent closed-loop manufacturing of high-performance composite reinforcement of the spline shaft and other complex workpieces is achieved, the problems that a traditional step-by-step technology is large in positioning error, remarkable in heat accumulation, uneven in reinforcement and the like are effectively solved, the machining efficiency is remarkably improved, the surface integrity is remarkably improved, and the fatigue life is remarkably prolonged.

The invention discloses a composite coating for a high-pressure hydrogen pipeline and a preparation method and application thereof, the composite coating comprises a hydrogen storage layer and a hydrogen blocking layer, the hydrogen blocking layer is coated on the hydrogen storage layer, the material of the hydrogen storage layer is an oxide material, and the material of the hydrogen blocking layer is an inorganic-organic mixed coating. In the technical scheme provided by the invention, firstly, laser peening strengthening is carried out on the surface of the matrix to refine crystal grains and reduce the hydrogen embrittlement sensitivity of the material, then, the oxide hydrogen storage layer is arranged to effectively absorb infiltrated hydrogen atoms, and finally, the hydrogen resistance layer made of an organic polymer and a two-dimensional material is arranged on the outermost layer to effectively absorb the hydrogen atoms. And external hydrogen atoms can be prevented from entering, and meanwhile the anti-corrosion function is achieved. The composite coating can be used for the inner surface of the hydrogen conveying pipeline, the risk of hydrogen damage of the pipeline is effectively reduced, the corrosion resistance is improved, and long-period stable operation of the high-pressure hydrogen pipeline is guaranteed.

This invention discloses a method, device, terminal equipment, and storage medium for preventing tooth breakage based on laser peening, belonging to the field of gear surface strengthening technology. The method involves: acquiring the pulsed laser parameters and impact path of the gear to be treated during laser peening; providing an energy absorption layer at the root of the gear tooth, which is covered by a constraint layer; generating a laser scanning command based on the pulsed laser parameters and impact path, and sending the laser scanning command to a laser generator to control the laser beam to scan, so that the laser beam penetrates the constraint layer and irradiates the energy absorption layer; after being irradiated, the energy absorption layer absorbs laser energy to form plasma, and the plasma generates an inwardly propagating shock wave under the constraint of the constraint layer, inducing plastic deformation at the gear tooth root position and forming a residual stress layer on the surface of the gear tooth root. Therefore, by implementing this invention, the problem of insufficient depth of the residual compressive stress layer on the tooth root surface in the prior art can be solved.

A kind of method for analyzing residual stress field of laser shot peening of aviation aluminum alloy containing texture, based on X-ray diffraction method, grain orientation information and laser shot peening finite element simulation result analysis residual stress, using chemical milling to strip layer, based on X-ray diffraction, grain orientation information and ABAQUS laser shot peening finite element simulation, the residual stress field generated by laser shot peening of 2024T351 aluminum alloy is analyzed, it is a complete method suitable for residual stress analysis of strong texture material, the method is aimed at the problem of layer-by-layer stripping of material, the anisotropy phenomenon caused by grain preferred orientation and the problem of poor data reliability, the method of analyzing residual stress by X-ray diffraction is optimized in details, including the combined application of chemical milling stripping layer, residual stress calculation considering grain orientation information and data screening.The present application makes the inner surface of chemical milling window flat by plane layer-by-layer stripping, which has a positive effect on improving the accuracy of residual stress test, and reliable stress data is obtained.

This invention relates to a method for preparing an arc-shaped water-collecting surface using laser shot peening assisted by a pressurized gas environment. The method includes placing a sealed reaction chamber in a first pressurized gas environment, irradiating the surface of an aluminum plate with a high-energy short-pulse laser under the influence of this environment to prepare a hydrophilic arc-shaped water-collecting region, discharging the gas from the sealed reaction chamber, injecting He gas to maintain this for ten minutes, and then placing the sealed reaction chamber in a second pressurized gas environment. Under the influence of this second pressurized gas environment, irradiating the surface of the aluminum plate with a low-energy short-pulse laser to prepare an arc-shaped superhydrophobic region. This process is repeated alternately. This method facilitates the formation of a denser micro / nano structure on the surface of the aluminum alloy, enabling in-situ generation of carbon / oxygen-based reinforcing phases and further improving the mechanical properties of the aluminum alloy water-collecting surface.

The application provides a kind of aviation engine turbine blade laser shot peening ring clamp, it is related to turbine blade processing technical field.The aviation engine turbine blade laser shot peening ring clamp, including annular mounting table, the inner wall of the annular mounting table is fixedly connected with cross fixed seat, the upper surface middle part of the cross fixed seat is connected with positioning placement assembly, the upper surface of the annular mounting table is rotatably connected with threaded rotating rod.The application, start third drive cylinder, the piston end of third drive cylinder moves with the connection fixed disc, so that fourth servo motor is close to the curved blade with two blade clamping plates through rectangular mounting plate, so that two blade clamping plates are located at the two sides of curved blade, by starting fourth servo motor, the output shaft of fourth servo motor rotates with rectangular mounting plate, rectangular mounting plate rotates with two blade clamping plates, the angle of two blade clamping plates can be changed, suitable for different turbine blades, and the adaptation degree is high.

The invention discloses a laser peening electrical aluminum alloy surface modification method based on a functionalized absorption layer, and belongs to the technical field of surface processing. The pure aluminum powder and the modified alloy powder are uniformly dispersed in the absorbing layer of the laser peening, the absorbing layer is used for absorbing high-pressure plasma shock waves generated by laser energy, powder particles are pressed into the surface of the aluminum alloy matrix at a high speed and combined to the surface of the aluminum alloy matrix, and integrated improvement of matrix surface strengthening, corrosion resistance and conductivity is synchronously achieved. The method is high in process integration degree, the functional layer and the base body are tightly combined, no additional subsequent function modification procedure is needed, and the method can be widely applied to the fields such as aerospace, electronic power and rail transit which have requirements for the comprehensive performance of the aluminum alloy surface.

This invention discloses a GH4169 high-temperature alloy component and its laser shot peening-cladding repair and application. The process includes pretreatment of the GH4169 high-temperature alloy substrate surface to be repaired; impact strengthening of the repaired area using laser shot peening; and subsequent material deposition repair using laser cladding in the pretreated area to obtain a cladding repair layer. Under the thermal cycling effect of laser cladding, the high-density lattice defects pre-placed by laser shot peening act as heterogeneous nucleation cores, promoting the formation of fine equiaxed grain bands at the substrate / cladding layer interface and creating a gradient microstructure of fine-grained to coarse-grained to fine-grained in the heat-affected zone. This invention significantly improves the substrate / cladding layer interface microstructure, reduces grain coarsening in the heat-affected zone, mitigates the adverse effects of residual tensile stress, and enhances the load-bearing capacity of the repaired area. The resulting repaired component exhibits higher microhardness and tensile strength, making it suitable for life-extending repair of aero-engine blades, casings, seals, and other critical GH4169 high-temperature alloy components.

The invention relates to the technical field of laser shock peening, and particularly discloses a laser shock peening method for an in-situ non-detachable structure, and the method comprises the following steps: inspection before laser shock, equipment preparation and detection of an area to be peened; carrying out unfolding installation and function debugging on the laser strengthening equipment; laser pulse energy, pulse width, spot size and strengthening strength are tested, so that laser parameters are stable and meet preset requirements; a laser path is generated according to the to-be-strengthened area, and arrangement of an absorption layer and a restraint layer, energy setting, laser shock processing and quality inspection are completed in sequence; and finishing final quality inspection and arrangement and resetting of the equipment and the site. According to the method, the strengthening effect equivalent to that of vertical incidence can still be obtained under the complex space condition, the spot size and path planning are optimized, the amplitude, depth and distribution of residual compressive stress are more uniform, and therefore the anti-fatigue capacity and long-term service reliability of the structure are improved.

The invention provides an annular clamp for laser peening of an aero-engine turbine blade, and relates to the technical field of turbine blade machining. The annular clamp for laser peening of the aero-engine turbine blade comprises an annular mounting table, a cross-shaped fixing seat is fixedly connected to the inner wall of the annular mounting table, a positioning and placing assembly is connected to the middle of the upper surface of the cross-shaped fixing seat, and a threaded rotating rod is rotationally connected to the upper surface of the annular mounting table. According to the device, a third driving air cylinder is started, the piston end of the third driving air cylinder drives a connecting and fixing disc to move, a fourth servo motor drives two blade clamping plates to get close to a curved blade through a rectangular mounting plate, the two blade clamping plates are located on the two sides of the curved blade, and by starting the fourth servo motor, the curved blade can be clamped by the two blade clamping plates. And an output shaft of a fourth servo motor drives a rectangular mounting plate to rotate, the rectangular mounting plate drives two blade clamping plates to rotate, the angle of the two blade clamping plates can be changed, the device is suitable for different turbine blades, and the adaptation degree is high.

The invention relates to a laser peening inherent strain prediction method based on Gaussian process regression, which comprises the following steps: carrying out a laser peening orthogonal test, and establishing model training data; carrying out normalization processing on the training data by adopting a maximum and minimum normalization method; selecting a mean value function, a covariance function and a hyper-parameter optimization algorithm, and establishing a Gaussian process regression model; training the Gaussian process regression model by using the training data, and optimizing hyper-parameters of the Gaussian process regression model; and utilizing the trained Gaussian process regression model to predict inherent strain distribution under any process parameter combination so as to realize continuous correspondence between the process parameters and the inherent strain. According to the laser peening intrinsic strain prediction method based on Gaussian process regression, intrinsic strain distribution prediction under any technological parameter combination is achieved by establishing the Gaussian process regression model and optimizing hyper-parameters through training data, and the method has the advantages that the number of tests is reduced, and prediction efficiency and accuracy are improved.

The application relates to a laser shot peening forming device and method with an explosion shock wave as a constraint layer, which comprises a constraint layer preparation system and a laser shot peening forming system, the constraint layer preparation system is fixed, and the laser shot peening forming system is opposite to an explosion particle shock wave opening. The constraint layer preparation system comprises an explosion particle ball transmission device and an explosion particle ball ignition device, mainly comprises telescopic rods, door-shaped support plates, a fan and other equipment, can suspend the explosion particle ball in the air, and then ignites the explosion particle ball by using a nanosecond laser; the laser shot peening forming system is directly irradiated on the workpiece surface by a hundred-joule laser. The application uses the fluid dynamics theory, combines the characteristics that high-pressure airflow exists interaction, restrains and strengthens the plasma airflow generated on the workpiece surface by the shock wave generated by the explosion particle ball, and thus the effect of the constraint layer is achieved.

The application provides a laser shot forming method for a thin plate member with a Gaussian curvature surface. The method comprises the following steps: selecting a thin plate with a proper thickness according to the thickness of the member and the bending angle of the member when the laser is impacted, making the direction of the laser impact opposite to the direction of the deformation bending of the thin plate, adopting one of the following laser input types in the overlapping direction of the laser spots or the overlapping direction of the laser spots: a symmetric parabola type, a symmetric circular arc-symmetric circular arc type combination, a symmetric circular arc-horizontal straight line type, a symmetric parabola-horizontal straight line type and a horizontal straight line-symmetric parabola type, and forming the member with the Gaussian surface through a laser shot forming device.

The application provides a kind of integrated composite processing device of laser welding and laser shot peening, including mobile device, laser welding-shot peening assembly, water tank, water injection system, workbench and control system;The laser welding-shot peening assembly includes laser welding device, mechanical arm clamping assembly and laser shot peening device;The laser welding device and laser shot peening device are installed on the mechanical arm clamping assembly;The mechanical arm clamping assembly is connected with the mobile device, for driving the laser welding device and laser shot peening device to move along the processing surface;An inclined surface of the water tank is provided with a workbench parallel to the inclined surface;The water injection system is used to inject water into the water tank;The control system controls the water injection amount, so that the horizontal surface in the water tank coincides with the laser shot peening processing point.The device can realize the synchronous movement of laser shot peening and laser welding, the water surface and the laser nozzle are synchronously raised, the shot peening efficiency is effectively improved, the weld surface quality after impact is uniform, and the precision requirement is high.

The application relates to a solidification device and method for preparing superfine high-temperature alloy by multi-angle promoting nucleation rate, and relates to alloy comprehensive mechanical property measurement. In order to solve the problems of obvious directionality and element segregation of the existing Nb-Si-based high-temperature alloy when the arc melting is adopted, the application cooperates the double-gun-head arc gun design with the established arc gun operation angle, operation direction, operation sequence and operation frequency, forcibly generates convection in the high-temperature alloy liquid, effectively reduces the composition segregation of the high-temperature alloy and improves the nucleation rate of the high-temperature alloy by using the convection effect. The laser shot peening treatment is creatively carried out on the upper end surface of the oil-water mixed liquid cold copper crucible, a large number of nanoscale micro recesses are formed as non-uniform nucleation points, and the nucleation rate of the high-temperature alloy is improved. The structure of the ingot turning spoon and the monitoring system is improved, the modifier introduced has a synergistic effect with the convection effect, and the nucleation rate of the high-temperature alloy is also effectively improved. The application is used for the preparation of high-temperature alloy.

The application provides a method and device for improving the mechanical fatigue performance of a submarine cable soft joint, and relates to the technical field of ocean engineering. The method first measures the surface roughness and residual stress of the soft joint before treatment, obtains a first measurement value, and obtains the geometric surface accuracy of the soft joint before treatment, and determines the residual stress design value and the surface roughness design value of the soft joint according to the fatigue life target, determines the required laser shot parameter in the second database according to the first measurement value and the design value, and performs laser shot treatment on the surface of the soft joint according to the parameter until the geometric surface accuracy, the surface roughness and the residual stress of the soft joint all meet the design requirements. The device comprises a computer control system, a laser power supply, a laser shot device, a transmission lens group, a part clamping robot and a water spraying robot. The method and device provided by the application can improve the tensile performance, the fatigue resistance and the electrochemical corrosion resistance of the soft joint.

The application discloses a whole ribbed component laser shot forming prestress clamp, which comprises a base, a shell, a driving assembly, a clamping plate, a deformation assembly and a dust removal assembly. The base is internally connected with the shell in a sliding mode. The bottom of the shell is provided with the driving assembly. The shell is internally and symmetrically provided with the two clamping plates and the deformation assembly. The side wall of the shell is provided with the dust removal assembly. The ribbed component is placed in the shell before shot forming. The driving assembly drives the shell to move to the tail end of the base, drives the two clamping plates to approach each other to clamp the component, drives the deformation assembly to protrude upward at the same time that the two clamping plates approach each other, and deforms the component in cooperation with the clamping plate. Meanwhile, the dust removal assembly is driven to remove the dust generated when the component deforms in the process that the shell moves. The shell moves to the tail end of the base and is located at the bottom of a shot forming equipment. The deformed component is subjected to shot forming. The deformed component does not need to be additionally subjected to dust removal operation, and the shot forming efficiency is improved.

The present application relates to a kind of forming method of fastener, the longitudinal section of fastener is T-shaped, including vertically arranged stud and the head of top in the stud, the diameter M of stud ≥30mm, this forming method sequentially includes the following steps: 1) laser shot processing, 2) quenching treatment, 3) multiple penetration treatment and 4) micro-arc oxidation treatment.Process synergy is made by laser shot, quenching, multiple co-permeation and micro-arc oxidation, so that fastener has high hardness while obtaining high corrosion resistance and fatigue performance.

The application discloses a double-sided laser shot peening cumulative forming device and method, which comprises a laser shot peening system, a motion control system, an information acquisition system, a sample rotating system and the like. The application solves the problem of inconsistent curvature change of plate deformation when single-sided and single-time shot peening is performed. The method utilizes a rotating clamping system to realize interval shot peening of the double sides of the plate, combines cumulative forming and concave-convex deformation modes, sets an energy gradient of a shot peening surface, and realizes real-time monitoring of a shot peening process and adjustable parameters, so that the curvature of plate deformation can be greatly improved, and the deformation precision can be improved.

The invention relates to the technical field of gear surface strengthening, in particular to a method for improving carburized gear steel surface wear resistance based on a laser peening technology, which comprises the following steps of: firstly, carburizing a gear steel sample to form a high-carbon surface layer by combining carburizing heat treatment with the laser peening technology; and then carrying out laser shot peening treatment by adopting high-power-density short-pulse laser. Plasma shock waves generated in the laser shot peening process induce the surface layer of the material to generate plastic deformation, unstable retained austenite is promoted to be converted into martensite, and the phenomenon of abnormal microhardness distribution is eliminated. According to the method, a high-amplitude residual compressive stress field can be excited in a carburized layer, a gradient nano structure is formed through induction, residual compressive stress distribution is improved, and the depth of an effective hardened layer is increased, so that the surface wear resistance and crack initiation resistance of the gear under the working conditions of high contact fatigue and heavy-load wear are improved.

This invention relates to an ion implantation process for wear-resistant surface modification of high-strength and tough titanium alloy plates, belonging to the field of alloy surface treatment technology. The process includes: surface pretreatment of TC4 titanium alloy plates, deposition of a yttrium-containing Ti-Y composite coating using magnetron sputtering, laser peening of the coating, and boron ion implantation. This invention achieves a composite modified layer on the titanium alloy surface with a gradient transition in hardness and toughness through Ti-Y coating toughening, laser peening to construct diffusion channels and residual compressive stress fields, and boron ion implantation to form an ultra-hard TiB / TiB2 phase. This effectively solves the problems of shallow ion implantation depth and brittle, easily peeling hardened layers in traditional methods, significantly improving wear resistance while maintaining the toughness of the matrix.