62 results about "Laser peening" patented technology

The invention belongs to the technical field of processing of copper-aluminum composite bars for electrical connection, and particularly relates to a preparation method of a high-performance copper-aluminum composite material. The Al-based brazing filler metal adopted in the preparation process is prepared from 75-85% of Al, 10-15% of Si and 0.1-10% of Ag through a melt rotary quenching method. When the high-performance copper-aluminum composite material is prepared from the powder Al-based brazing filler metal, firstly, a copper strip is unfolded, and the surface of the copper strip is cleaned; then powder Al-based brazing filler metal is sprayed to the surface of the cleaned copper strip through an electrostatic spraying machine, and meanwhile the surface where the powder Al-based brazing filler metal is attached is treated through a laser shot peening machine; and finally, a conventional cast rolling technology is adopted for completing semi-solid compounding between the copper strip attached with the powder Al-based brazing filler metal and molten aluminum, and the high-performance copper-aluminum composite material is obtained. By using the self-made alloy brazing filler metal and combining with a laser peening adhesion technology, good connection between copper and aluminum can be formed, and formation of harmful phases on a copper-aluminum interface is inhibited on the premise of ensuring electrical properties, so that the interface bonding reliability of the copper-aluminum composite material is improved.

The invention provides a laser peening shape correcting system and method for a high-speed carrying equipment vehicle body thin-wall component. The laser peening shape correcting system comprises a measuring module, a process design module, an integrated control module, a laser scanning module and a machining workshop. The geometric shape of the thin-wall component to be corrected is obtained through the measurement module and input to the process design module; in the process design module, laser peening correction process parameters of the thin-wall component are designed based on the measured shape and the target shape, and a laser scanning path is generated and transmitted to the integrated control module; in the integrated control module, motion parameters of the laser scanning module are calculated according to the laser scanning path, and a motion instruction is issued; and after receiving the motion instruction, the laser scanning module begins to carry out shape correction processing on the thin-wall component placed in the processing workshop. By means of the system, the problem that the geometrical shape of the vehicle body thin-wall component is out of tolerance due to assembly welding and foreign object collision is effectively solved, and the system has the advantages of being good in controllability, high in shape correcting capacity and the like and has extremely high engineering application value.

The present invention discloses a gradient structure 3D printed metal component and its preparation process, belonging to the field of 3D printing forming preparation. The preparation process of the present invention includes: 1) 3D printing material preparation, 2) 3D model construction and parameter setting, 3) 3D printing forming, 4) mechanical treatment, 5) surface treatment, and finally obtaining a 3D printed metal component with a dense surface without pores and excellent mechanical properties. The present invention solves the problems of material surface densification and pores by introducing laser peening technology into the preparation process of 3D printed metal components, and solves the problem of crack propagation by introducing a pulsed electric field during the laser peening process, thereby preparing high-quality gradient structure 3D printed metal components.

The invention relates to the technical field of friction stir welding joint post-treatment strengthening, and particularly discloses a friction stir welding joint strengthening device and method based on grinding and laser peening, and the device mainly comprises a movement assembly and a welding joint grinding and laser peening composite strengthening machining head; the moving assembly further comprises a machining platform and a six-axis robot. The welding seam grinding and laser peening composite strengthening machining head further comprises a machining head cross beam, a galvanometer laser head, a laser total reflection mirror, a front grinding wheel and a rear grinding wheel. Polishing and surface strengthening are organically combined, friction heat in the polishing process is fully utilized, the plasticity of the high-strength aluminum alloy in the polishing area is enhanced, laser peening without an absorption layer and a restraint layer can be directly used for strengthening the surface, remarkable microstructure optimization and a residual stress field with a higher amplitude and a larger depth can be obtained, and the surface strengthening effect is improved. Therefore, the friction stir welding joint with smooth surface and high performance is obtained.

The invention provides a method for improving the fatigue performance of a TiAl alloy, and belongs to the technical field of alloy additive manufacturing. The method comprises the following steps: carrying out hot isostatic pressing treatment on a TiAl alloy cast ingot to obtain a TiAl alloy sample; the TiAl alloy sample is subjected to heat treatment, grinding and polishing in the argon atmosphere, and a TiAl alloy sample of a full lamellar structure is obtained; according to the method, the TiAl alloy sample with the full lamellar structure is subjected to laser shot peening treatment, the fatigue performance of the TiAl alloy can be effectively improved through the method, crack propagation of the TiAl alloy is inhibited, and the application requirement is met.

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 vehicle link and a method of laser peening a link. A first end of the link defines a pin opening and a second end defines a cylindrical bore. A clear coating is applied on the first target surface and the second target surface of the connecting rod. Opposite first and second target surfaces are impinged with a plurality of pulses of a pulsed laser beam in a localized region between the pin opening and the cylindrical bore. After laser peening, a localized region between the pin opening and the cylindrical bore exhibits compressive residual stress at a depth of at most 0.75 mm.

A laser shot peening strengthening device suitable for plate-shaped samples comprises a power device, a transmission device, a lens group device and a box device arranged in sequence in the transverse direction; the power device comprises a motor, the motor transmission connection gear is connected to a support platform through a longitudinal rack, and the motor is used to drive the gear to rotate so that the support platform reciprocates along the longitudinal rack; the transmission device comprises a support platform, and the lens group device is arranged on the support platform; the lens group device comprises a laser transmitter, and the laser beam emitted by the laser transmitter enters the box device through the lens group; the box device comprises a protective box, and a reflector is arranged in the protective box, and the sample is located on the path of the laser beam reflected by the reflector. The present invention is easy to implement in the laboratory, simple to operate, and less affected by environmental factors.

A method of processing aluminium alloy by pulse current assisted laser peen forming followed by making the peened surface hydrophobic. During laser peening the aluminium alloy is clamped between elect

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.

A connecting rod for a vehicle and a method of laser peening a connecting rod. The connecting rod defines a pin opening at a first end and a cylindrical bore at a second end. A clear coating is applied on a first target surface and a second target surface of the connecting rod. The first and second opposing target surfaces are impinged in a localized area between the pin opening and the cylindrical bore with a plurality of pulses of pulsed laser beams. After laser peening, the localized area between the pin opening and the cylindrical bore exhibits compressive residual stresses at a depth of up to 0.75 millimeters.

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 natural absorption layer for underwater component laser peening and application of the natural absorption layer, and belongs to the technical field of material surface life prolonging. According to the method, a biological membrane with gradient optical characteristics is formed through in-situ induction of marine microbial communities to serve as a natural absorption layer, dynamic adaptation of laser peening parameters and the state of the biological membrane is achieved in combination with a multi-physical field coupling regulation and control technology, surface strengthening and corrosion synergistic inhibition are synchronously completed, and finally eco-friendly underwater life prolonging treatment is achieved.

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 belongs to the technical field of laser application devices, and particularly relates to an interlayer laser shot peening strengthening device embedded in the melting process of a laser powder bed, the interlayer laser shot peening strengthening device comprises a powder supply and recovery module, a laser scanning forming module and a pulse laser shock peening module, the laser scanning forming module is used for covering the metal powder particles in the printing bin with high-energy laser through reflection, and melting forming of the metal powder particles is achieved; pulse laser in the pulse laser shock peening module acts on the part under construction after melting of the metal powder particles, so that each layer of the part is strengthened in the manufacturing process; according to the laser shock peening device, laser shock peening can be carried out after each layer of metal powder particles are melted through laser, and the processing performance of parts produced through the laser powder bed melting technology is further improved by refining crystal grains and reducing defects.

The present invention relates to the technical field of post-processing strengthening of friction stir welding joints, and specifically discloses a friction stir weld strengthening device and method based on grinding and laser shot peening. The device mainly includes a motion component, a weld grinding and laser shot peening composite strengthening processing head; the motion component further includes a processing platform and a six-axis robot; the weld grinding and laser shot peening composite strengthening processing head further includes a processing head crossbeam, a galvanometer laser head, a laser full-reflecting mirror, a front grinding wheel, and a rear grinding wheel. The present invention organically combines grinding and surface strengthening, fully utilizes the friction heat during the grinding process, enhances the plasticity of the high-strength aluminum alloy in the grinding area, and can directly use laser shot peening without an absorption layer and a constraint layer to strengthen the surface, which is conducive to obtaining significant microstructure optimization and a residual stress field with a higher amplitude and greater depth, thereby obtaining a friction stir welding joint with a smooth surface and high performance.

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 belongs to the technical field of forming of ribbed wallboards of aerospace and rail transit equipment, and particularly relates to a laser peening shape-adjusting controllability collaborative device and method for improving the forming quality of a rib plate, the device comprises laser peening equipment, and laser beams generated by the laser peening equipment are used for laser peening strengthening and forming of the whole rib plate; the absorption protection layer covers the light facing surface of the laser operation area of the integral rib plate; the multi-degree-of-freedom clamping equipment is used for clamping the whole rib plate; the restraint layer nozzle is used for providing a restraint layer for the surface of an operation area of the whole rib plate when the laser peening equipment works, and the restraint layer nozzle is arranged on the multi-degree-of-freedom supporting and moving equipment; the induction coil is used for heating and quenching the whole rib plate; the induction coil is arranged on the multi-degree-of-freedom supporting mobile equipment and corresponds to an operation area of the restraint layer nozzle; the induction quenching control system is used for controlling the induction coil to generate induction heat; and a chordwise forming mode and a spanwise forming mode are provided according to different laser beam and induction coil operation parts.

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 invention provides a method for preparing a durable aviation aluminum alloy super-hydrophobic surface through liquid nitrogen assisted laser peening, which comprises the following steps: a pretreated aluminum alloy workpiece is fixed on an impact platform, and the impact platform is positioned in a sealed protective cover; flowing liquid nitrogen is continuously input into the to-be-machined surface of the aluminum alloy workpiece; the liquid nitrogen layer serves as a restraint layer; the to-be-machined surface of the aluminum alloy workpiece is subjected to laser peening treatment without an absorption layer; a to-be-processed surface is irradiated through short pulse laser, and a super-hydrophobic micro-nano multilevel structure with the surface containing nitrogen is formed; and placing in a vacuum drying box for drying treatment, so as to obtain the super-hydrophobic surface of the aviation aluminum alloy. The aviation aluminum alloy super-hydrophobic surface with high durability is prepared in one step, the nitride improves the hardness of the structure, the capability of preventing damage of foreign objects is improved, and the durability of the super-hydrophobic surface is improved.

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.