746 results about "Thermal damage" patented technology

The present invention provides a method and device for controlling the heat-affected zone of a perovskite battery laser processing, the method comprising: performing multi-source data collection and calibration processing on the perovskite battery stack structure to obtain a calibration data set including temperature distribution, surface morphology and electrical characteristics; based on the calibration data set, comprehensively analyzing the area where ion thermosensitive reactions are generated to obtain the risk zoning result of the heat-affected zone; based on the risk distribution result of the heat-affected zone, differentially configuring the energy output and movement path of the laser etching to obtain a control instruction set for local etching; according to the control instruction set, executing the laser etching process to obtain an etching control scheme for managing the heat-affected zone. The method monitors and identifies heat-sensitive areas in real time based on the collection and analysis of multi-source data, controls the temperature distribution and local thermal stress during laser processing, reduces thermal damage by accurately adjusting the laser power and scanning path, and improves the long-term stability of the perovskite battery.

The invention relates to the technical field of industrial control, in particular to an intelligent centerless grinding machine cooling system and method for difficult-to-machine materials, and the system comprises a multi-source sensing unit, an edge calculation module, a decision center module, a precise execution module and a digital immune memory bank; compared with the defects that in the prior art, monitoring depends on a single temperature sensor, thermal field sensing is incomplete, thermal damage early warning lags behind and the like, according to the scheme, grinding power frequency spectrum, acoustic emission signals, triaxial vibration and coolant mass spectrum data are collected in real time through a multi-source sensing unit, and a micron-sized temperature field is reconstructed in combination with an edge end space-time diagram convolutional network; full-dimensional monitoring of the grinding thermal-mechanical coupling effect is achieved, and thermal anomaly recognition sensitivity and early warning timeliness are remarkably improved.

The invention provides a wet-type high-power combined laser cleaning method suitable for a heavily-corroded steel structure. S1, measuring the thickness of a rust layer on the steel surface of the steel structure; s2, liquid is sprayed to the surface of the to-be-cleaned area of the steel structure to form a liquid film, and the liquid film is used for increasing the laser absorptivity of the surface of the rust layer; s3, the to-be-cleaned area is preliminarily cleaned through continuous laser, the rust layer is made to be fluffy and stripped through the thermal expansion effect, and the thickness of the rust layer is reduced to be not larger than the target threshold value of preliminary cleaning; s4, performing fine cleaning by using pulse laser to accurately remove a residual stubborn rust layer; s5, the to-be-cleaned area is washed; the device can effectively remove a rust layer on the surface of the steel, reduce plasma and smoke dust generated in the laser cleaning process, ensure the safety and high efficiency of the cleaning process, adopt the combination of continuous laser and pulse laser, clean in stages, effectively improve the cleaning efficiency, and reduce thermal damage to the surface of the steel.

The invention belongs to the technical field of laser processing, and particularly relates to a laser processing control method based on a neural network, and the method specifically comprises the following steps: a target definition and input stage; a physical model and database stage: establishing a basic model library; establishing a mapping database; in the AI core engine stage, a training model learns a complex nonlinear relation among laser parameters, material response and a final processing result; searching an optimal laser parameter combination by using an optimization algorithm based on the prediction model and a target set by a user; a laser parameter automatic adjustment and execution stage; a real-time monitoring and feedback stage; and an iterative learning and system improvement stage. The invention further discloses a control system, electronic equipment and a computer storage medium. According to the method, submicron precision control is achieved, thermal damage can approach to zero, the development period is shortened, online real-time regulation and control are achieved, energy consumption is reduced, the material utilization rate is increased, and the method has an interpretable decision-making mechanism and cross-material generalization ability.

The invention provides an intelligent detection method and system for the tensile property of a plastic cable tie. Gradient temperature rise control is executed through the carbon fiber heating tube array, microscopic deformation fluctuation characteristics are captured through the double-grating displacement sensor, and temperature field distribution is collected through the infrared thermal imager. Establishing dynamic correlation between deformation and a temperature field to generate a three-dimensional space-time atlas, identifying a migration path of a thermal aggregation area, recording a standard path, and calculating a thermal anomaly coefficient in combination with pressure data; analyzing temperature conduction hysteresis to generate a heat conduction parameter, and dynamically correcting a threshold value by cross-modal correlation with an abnormal coefficient; a structure degradation index is generated based on the migration path, mapping between the structure degradation index and a temperature field is established to generate a thermal damage compensation coefficient, an abnormal coefficient is calibrated accordingly, and grading early warning is triggered in combination with the path deviation degree. According to the technical scheme provided by the invention, multi-scale damage evaluation from thermodynamic associated data acquisition to molecular chain fracture inversion is realized, and the high-temperature tensile failure critical point is accurately pre-judged through a dynamic calibration early warning mechanism.

The invention relates to the technical field of laser processing, and discloses a sports kettle trepanning method and system based on a laser cutting technology. The method comprises the steps that through three-dimensional point cloud scanning and local curvature calculation, reinforcement learning dynamic path planning, transient thermodynamic coupling parameter optimization, deformable mirror-mechanical arm cooperative control and infrared temperature field feedback closed loop, high-precision cutting and thermal damage suppression of the complex curved surface are achieved, and path re-planning is triggered when deviation exceeds the limit. The system comprises a laser ranging sensor array module, a reinforcement learning decision module, a thermodynamic coupling solver module, a deformable mirror and six-axis mechanical arm cooperative control module and a multi-sensor feedback module. Through curvature self-adaptive laser processing, multi-physical field thermal damage cooperative control, optical-mechanical dynamic focusing and intelligent closed-loop optimization, high-precision cutting of the complex curved surface is achieved, the calculation efficiency and the system stability are both considered, and the processing quality and adaptability are effectively improved.

The invention discloses a rigid-flex circuit board slotting process based on a laser depth control technology. The rigid-flex circuit board slotting process comprises the steps that the surface of a rigid layer of a rigid-flex circuit board is pretreated, and a laser sensitive layer is sprayed; cNC depth-controlled milling is adopted to form a grooved rough blank structure on the surface of the pretreated rigid layer; positioning laser is used for scanning, a three-dimensional model is established through collected reflected signals, then layered depth-controlled ablation is conducted, second-power laser is sequentially adopted for fine cutting, third-power laser is sequentially adopted for depth calibration, and a groove body structure is formed; cleaning an interface, scanning a groove bottom area and synchronously introducing low-temperature gas; performing morphology repairing treatment, and generating a periodic micro-nano structure on the groove wall by adopting short pulse laser to form a stress concentration resistant surface; depositing an insulating medium layer, and forming a continuous packaging protection layer on the groove wall and the bottom through a vacuum coating process; the high-precision depth-controlled slotting of the rigid-flex circuit board is realized, and meanwhile, the ultra-low thermal damage and anti-fatigue structure and long-acting environmental stability are realized.

The invention provides a laser surface treatment method, device and equipment based on visual control, and the method comprises the steps: carrying out the energy waveform capture processing of pulse laser outputted by laser marking equipment, and carrying out the multi-channel visual detection of a surface reflection region of a to-be-marked part based on a pulse energy reference, and obtaining the surface feature information; planning an initial scanning path according to the surface feature information, and synchronously correcting a trigger time sequence of the pulse laser to obtain a target marking path; and in combination with the target marking path and the pulse energy reference, dynamic observation and local heat dispersion treatment are conducted on the marking area, and the treated part surface is obtained. The method is suitable for performing fine marking on a high-reflectivity or complex geometric surface, and can perform timely adjustment according to local temperature rise or optical characteristic change in the marking process to reduce depth unevenness and thermal damage.

The invention discloses a device and a method for low-thermal-damage laser stripping and cutting of transparent materials, the device comprises a laser, and a first half-wave plate, a linear polarizer, a beam expander, a second half-wave plate, a vortex wave plate and a processing objective lens which are sequentially arranged along the laser transmission direction, and emergent light of the processing objective lens enters a processing material; a machining material is adsorbed and fixed to the cooling suction cup, and the cooling suction cup is installed on the three-dimensional moving platform. Light subjected to polarization modulation is focused into a material through the objective lens to be modified, a complete modified layer is formed along with movement of the three-dimensional platform, the device and the method have the advantages of low thermal damage and high precision when being used for stripping and cutting, and material loss caused in the laser machining process can be reduced.

The invention provides welding equipment for photovoltaic support assembly, and belongs to the technical field of photovoltaic support welding, the welding equipment comprises a supporting frame and a processing table, the supporting frame is connected with a supporting seat, an electric sliding table is arranged on the inner side of the supporting seat, an air cylinder and a welding head are arranged on one side of the electric sliding table, and a pipeline assembly is arranged on the inner side of the supporting seat; the eliminating assembly is used for cleaning dirt on the inner wall of the pipeline assembly; the screening assembly is used for filtering the cooling water in the pipeline assembly; the cooling device has the beneficial effects that the extrusion block can extrude the pressure sensor by increasing the water pressure, so that a chemical solution is released into the spiral cooling pipe, adhesion of impurities to the inner wall of the spiral cooling pipe is reduced, the cooling effect on a welding head is guaranteed, heat damage to the welding head is relieved by timely heat dissipation and cooling, the service life is prolonged, and the production cost is reduced. Meanwhile, the filter cartridge is cleaned through the scraper, so that the blockage of the filter cartridge is reduced, and the filtering effect is improved.

The invention discloses a single crystal turbine blade crystal orientation defect detection system based on adaptive optics, particularly relates to the field of nondestructive testing, and is used for solving the problem that thermal damage and signal consistency are difficult to consider in acoustic imaging of complex structural parts. Through partition energy threshold setting, dynamic pulse planning, photoacoustic processing and unified coordinate cross-subarea data synthesis, local thermal damage caused by excessive concentration of energy is effectively avoided in the material detection process, and the requirement for collecting high-bandwidth signals can be met in a large range. The signal-to-noise ratio and the detection efficiency are improved by regulating and controlling pulse energy and a scanning path, the amplitude comparability and the image coherence among regions are ensured through signal normalization correction and subregion image set splicing, high-resolution and comprehensive-coverage acoustic mapping is output, the crystal orientation defects of the single crystal turbine blade are positioned and evaluated, the detection precision is improved, the measurement period is shortened, and the method is suitable for large-scale popularization and application. And the method has an applicable value for aero-engine parts requiring rapid and high-precision nondestructive detection.

The invention relates to the technical field of laser processing, particularly discloses an ultrathin prepreg single-emitting laser hole forming system, and aims to solve the contradiction among precision, thermal damage and efficiency in ultrathin prepreg laser processing. According to the system, through cooperation of an ultrashort pulse laser source, precise light beam shaping and transmission, material processing and positioning, real-time monitoring and feedback and an intelligent control and optimization module, laser and material interaction is finely regulated and controlled. In a single laser event or an equivalent single laser event, high-precision and low-damage microstructure processing of the ultrathin prepreg is realized, the defects of a heat affected zone, carbonization, layering and the like are effectively reduced, and the processing quality and efficiency are improved.

The invention discloses a plasma surface activation pre-bonding-femtosecond laser connection integrated process, belongs to the technical field of advanced dissimilar material precision connection, and particularly relates to a multi-material interface efficient connection method based on plasma surface activation pre-bonding and femtosecond laser processing. The method is suitable for high-strength and low-thermal-damage heterogeneous bonding of transparent materials (such as glass, quartz and sapphire) and transparent materials or metal materials (such as titanium alloy, stainless steel and invar alloy). According to the method, interface atomic-scale cleaning and chemical activity regulation and control are achieved through plasma activation, interface connection of the two materials is induced by combining the femtosecond laser ultrafast nonlinear effect, and the bottlenecks that in a traditional connection technology, optical contact depends on a mechanical clamp, and heat input is uncontrollable are broken through; and an innovative solution is provided for cross-material interface functional manufacturing in the fields of photoelectric device packaging, optical-electronic integrated systems and the like.

According to the optical element laser cutting process control method and system, the problems of microcracks and edge breakage caused by heat accumulation in laser cutting are solved through real-time monitoring and dynamic compensation of thermal field deviation of a turning area; the method comprises the steps that a turning area in a cutting path is recognized in advance, and key points are marked; during cutting, thermal field distribution is monitored in real time, and the heat center offset and direction are obtained; the laser power and the cutting speed are dynamically adjusted according to the offset, and the light spot position compensation offset is synchronously adjusted according to the offset direction and the offset; after passing through the turning center point, symmetrically recovering the laser parameters to initial values; the system comprises a path analysis module, a thermal field monitoring module, a control adjustment module, a parameter recovery module and an execution module, and closed-loop control of the method can be achieved through the system. Thermal damage of laser cutting in the turning area can be effectively restrained, the cutting quality consistency before and after the turning area is kept, and the machining yield is increased.

The invention belongs to the technical field of hard and brittle crystal material micropore machining, and particularly relates to an ultra-precision micropore multi-energy field coupling machining method and system.The method comprises the steps that the laser pulse frequency and power are set according to the workpiece material type and the micropore depth-diameter ratio, and a laser focus is positioned at the inner hole bottom of a workpiece; a modified structure extending in the axial direction of a hole is formed by controlling matching of a light spot and a hole diameter and the movement track of the light spot, in the machining process, a plasma nozzle and laser coaxially move, a modified area is removed in real time, a heat affected zone and the hole shape taper are restrained, meanwhile, vibration is applied to a workpiece through an axial ultrasonic vibration device, and machining precision is improved. And chip discharge is promoted, and stress and crack generation are reduced. The problems of serious thermal damage, poor hole shape precision, low machining efficiency and high energy consumption in the micropore machining process in the prior art are solved, and high-quality and high-precision machining of the high-depth-diameter-ratio micropore of the hard and brittle transparent crystal material is achieved.

The invention relates to the technical field of chip embedded module packaging, in particular to a blind hole processing method and a substrate. An embedded chip substrate is prepared, a chip is embedded in the embedded chip substrate, and the chip is covered with an insulating layer; determining a hole opening position on the insulating layer, wherein the hole opening position corresponds to the embedding position of the chip on the chip embedding substrate; laser ablation is conducted on the hole opening position through ultraviolet laser according to preset laser parameters, so that an initial blind hole is machined in the hole opening position; and performing residue removal processing on the initial blind hole through plasma equipment to obtain a target blind hole. Therefore, the initial blind hole is machined in the hole opening position through the ultraviolet laser, molecular bonds can be directly destroyed, cold ablation is achieved and thermal damage is reduced on the basis of the characteristic that photon energy of the ultraviolet laser is high, meanwhile, the target blind hole with the smooth hole wall can be obtained by conducting residue removing treatment on the initial blind hole through plasma equipment, and the hole opening precision is improved. Compared with the prior art, high-precision and high-quality machining of the blind hole is achieved.

The invention provides a high-value recovery method and device for a retired double-glass photovoltaic module. The high-value recovery method comprises the four steps of lossless disassembly of a frame and a junction box, gradient separation of double-sided glass, segmented pyrolysis of inert gas and material sorting. On the basis of gradient pyrolysis and flexible separation and recovery technologies, nondestructive recovery of the double-sided glass is realized, and complete separation of the double-sided glass is realized by gradient heating and flexible stripping technologies; high-value battery pieces are reserved, and thermal damage is avoided through segmented pyrolysis and ultrasonic vibration; resources are circulated in a closed-loop mode, the reutilization rate of glass, battery pieces and welding strips is high, and the retired double-glass assembly can achieve all-material closed-loop recycling.

The invention relates to the technical field of wireless communication, and provides a preparation method of a surface acoustic wave filter and the surface acoustic wave filter.The preparation method comprises the steps that S1, a substrate of the surface acoustic wave filter is obtained; s2, growing a plurality of metal electrodes and a protective layer on the front surface of the substrate, wherein the protective layer completely covers the plurality of metal electrodes; s3, presetting a soaking column area on the substrate, and spin-coating a layer of photoresist on the back surface of the substrate; s4, removing the photoresist in the soaking column region through exposure and development; s5, etching the soaking column region through dry etching to form a groove, and removing the residual photoresist on the substrate; s6, depositing an electroplating seed layer on the back surface of the substrate, and continuing to complete the copper electroplating process, so that the groove is filled with copper; and S7, grinding the back surface of the substrate until the back surface of the substrate is exposed, and reserving the soaking column formed in the groove to obtain the surface acoustic wave filter. The surface acoustic wave filter provided by the invention can effectively improve the thermal damage resistance of the device under the working condition of high input power.

The invention discloses a wafer bonding method, which comprises the following steps of: 1, providing a first wafer and a second wafer, the surface of the first wafer being provided with a microstructure with a high aspect ratio; step 2, cleaning the first wafer and the second wafer; step 3, performing vacuum drying treatment on the first wafer and the second wafer, wherein the vacuum pressure is controlled to be 0.1-10 Torr in the vacuum drying treatment process; step 4, carrying out pre-bonding on the first wafer and the second wafer to form a bonding body; and step 5, carrying out annealing treatment on the bonding body. Aiming at the problem of residual water in the pre-cleaning process in the bonding process of the micro-structure wafer with a high aspect ratio, the wafer is placed in a controllable vacuum environment, phase change boiling of liquid water under the condition of no heat input is realized, and the problem of high-temperature heat damage caused by an existing heating and baking method is effectively avoided.

The invention discloses a method for measuring the focus heat effect and the heat damage of a Raman probe. The method comprises the following steps: S1, establishing a stable laser output system, and configuring a proper optical focusing system; s2, heating the standard sample to a target temperature according to a preset step length, keeping for several minutes at each target temperature, and performing spectral measurement on the standard sample by using a Raman spectrometer; s3, in the Raman spectrum measurement process, carrying out real-time temperature monitoring on the surface of the standard sample, and carrying out normalization processing on collected Raman spectrum data; s4, establishing a quantitative relation model between the relative intensity change characteristic # imgabs0 # of the Raman spectrum and the temperature T; and S5, predicting the temperature T of the standard sample under the current preset parameters according to the model, and adjusting the measurement parameters according to the prediction result, so that the predicted temperature T is lower than the temperature threshold value of the to-be-detected sample. According to the method, the thermal effect of the laser can be predicted before Raman measurement, proper measurement parameters are set in advance, and thermal damage to a measured sample is avoided.

The invention provides an optical fiber penetration piece which comprises a penetration main piece, the penetration main piece is used for penetrating through an equipment shell, the penetration main piece is of a hollow structure with two open ends, the two open ends of the penetration main piece are respectively provided with a sealing assembly, and the sealing assemblies are provided with a plurality of through holes for armored optical fibers to pass through. The armored optical fiber comprises an optical fiber body and a protective sleeve, the optical fiber body is metalized, the protective sleeve is of a gold-plated structure, and the metalized optical fiber body is welded and connected with the gold-plated protective sleeve at the two ends of the protective sleeve through tin-antimony solder or tin-gold solder. The tin-antimony solder or the tin-gold solder has relatively low welding temperature, so that thermal damage to the optical fiber body can be reduced, the optical fiber body is prevented from being damaged due to overheating, and continuity and high quality of signal transmission are maintained; meanwhile, the tin-antimony solder or the tin-gold solder has good flowability and wettability and can be uniformly distributed at the connecting part of the optical fiber body and the protective sleeve, so that damage to the optical fiber body caused by local stress concentration is avoided.

The utility model discloses a forming tool for a variable cross-section composite material barrel. The forming tool comprises a first end cover, a second end cover, an upper die and a lower die, wherein the upper die and the lower die are provided with molded surfaces matched with the outer surface of the variable cross-section composite material barrel; and the composite core mold is provided with a molded surface matched with the inner surface of the variable cross-section composite material barrel, the composite core mold is located in a cavity defined by the upper mold, the lower mold, the first end cover and the second end cover, and a cavity used for forming the variable cross-section composite material barrel is defined by the upper mold, the lower mold and the composite core mold. The integral male die is made of low-melting-point alloy, thermal damage of high temperature to the composite barrel is avoided, secondary machining of the molded surface of the male die is not needed, the molded surface is smooth, the manufacturing period is short, and the comprehensive cost is low.

The invention belongs to the field of secondary battery manufacturing, and particularly relates to a composite foil current collector welding method.The composite current collector comprises an upper aluminum conducting layer, a middle high-molecular polymer layer and a lower aluminum conducting layer, and the welding method comprises the following steps that S1, micropore machining is carried out on a tab area of the composite current collector, forming a through micropore array; s2, laying a first pure metal foil on the upper surface of the tab area, and laying a second pure metal foil on the lower surface of the tab area; and S3, welding the tab area on which the pure metal foil is laid, so that the first pure metal foil, the upper aluminum conductive layer, the lower aluminum conductive layer and the second pure metal foil form through metallurgical bonding at the position of the micropore. According to the composite foil current collector welding method, ultrasonic energy is highly concentrated on a metal interface at the edge of a micropore, local metallurgical connection is achieved, overall heat input is low, hot melting and carbonization of a middle high-molecular polymer layer are effectively avoided, and an ultrathin metal layer is protected against heat damage.

The invention relates to a hard alloy micro-texture tool based on discharge plasma pressureless sintering and a preparation method. Comprising the following steps: preparing a micro-texture male die pressing head; wC-Co mixed powder is obtained; the pressure head in the step (1) is adopted to apply 150-180 MPa pressure to the WC-Co mixed powder, the pressure is maintained for 60 min, and a biscuit is obtained after demolding; putting the biscuit into a graphite mold, assembling the mold, carrying out vacuum pressureless sintering on the biscuit, heating to 1300-1400 DEG C at the heating rate of 90-110 DEG C / min, carrying out heat preservation for 10 + / -2 minutes, and then cooling to room temperature along with a furnace to obtain a hard alloy block with a micro-texture on the surface; and the micro-texture surface of the hard alloy block is only polished to be bright. According to the method, thermal damage and fusion edge collapse are thoroughly avoided, and high-precision, namely high geometric fidelity, high efficiency, namely short sintering period and low-cost preparation of the microstructure is realized.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a gradient functional composite coating applied to a boiler heating surface and a preparation method of the gradient functional composite coating in order to solve the technical problems that an existing protective coating of the boiler heating surface is prone to abrasion and oxidation and high in cost. Collaborative design is formed, and gradient matching of mechanical properties and environmental failure resistance is achieved. The low-melting-point glass powder is combined with the rare earth catalytic effect, low-temperature ceramization is achieved, and thermal damage to a matrix is avoided. After the metal ceramic transition layer is sprayed, high-frequency induction remelting treatment is carried out, meanwhile, laser cladding is carried out on the surface of the ceramic surface layer, a nanocrystalline-amorphous composite structure is formed, and the bonding strength of the coating is improved.

The invention discloses a green preparation method of a silicon-containing FeCo-based nano-alloy surface composite passivation film, which comprises the steps of pretreatment, passivation solution preparation, dipping film formation and post-treatment strengthening, and the passivation solution is a silane-tannic acid composite passivation solution; according to the step of dipping and film forming, the pretreated alloy is dipped into a passivation solution, and a uniform primary film is formed; performing heat treatment and curing on the primary membrane to form a Si-O-M covalent network; and the post-treatment strengthening is that a potassium fluotitanate solution is adopted for sealing treatment, and micropores of the film layer are filled. Through molecular-level compounding of silane and TA, the passivation film with compactness, flexibility and a self-repairing function is constructed; meanwhile, nano cerium oxide is introduced as a nano filler and a corrosion inhibitor, so that the corrosion resistance is synergistically improved; and a low-temperature water-based process is used in the whole process, so that thermal damage to the nano-alloy is avoided, large-scale production can be realized, the limitation of a single-component passivation film is broken through, and an efficient and green solution is provided for anti-corrosion treatment of the high-activity nano-alloy.

The invention relates to the technical field of processing control, and discloses an intelligent control method and system for diamond compact laser processing equipment. The method comprises the following steps: scanning a diamond compact by adopting a spectral reflection sensor and an acoustic emission signal device to obtain a four-dimensional characteristic tensor; inputting the tensor into a two-channel convolutional network to identify the grain boundary type; a PDC-Lambda algorithm is executed to construct a crystal boundary-power response mapping matrix; and establishing a three-level power regulation and control framework based on the mapping matrix to realize accurate processing control. According to the invention, accurate classification and positioning of different grain boundary types are realized. The problem that a traditional method lacks a grain boundary-power mapping mechanism is solved, and the corresponding relation between grain boundary characteristics and optimal machining parameters is established. The problem of insufficient power regulation and control precision is solved, fine parameter control from macroscopic to microscopic is realized through a three-stage regulation and control architecture, and thermal damage and microcrack formation of a grain boundary region are effectively prevented.

A water-guided laser assembly and a precision machining assembly are fixed to the same side of a sliding plate of a vertical five-axis machine tool, an ultrasonic vibration platform is installed on a C-axis workbench of the vertical five-axis machine tool, and the water-guided laser assembly, the ultrasonic vibration platform and the precision machining assembly are controlled by an industrial personal computer to cooperate with each other; a positioning measuring head is adopted to realize relative compensation of the water jet and the cutter; the water jet cooling effect is utilized in water-guided laser processing to reduce the heat affected area and improve the processing quality; ultrasonic vibration auxiliary machining effectively reduces cutting force, inhibits the surface water return phenomenon, improves machining efficiency and prolongs the service life of a cutter; and precise machining (milling, grinding and drilling) is carried out, so that the machining size precision is accurately corrected, and the residual laser-induced damage layer is removed. Through multi-energy-field in-situ combined machining, collaborative optimization of technological parameters and coordinate compensation, the problems of insufficient precision, low efficiency, thermal damage and the like during machining of complex geometrical shapes and difficult-to-machine materials in a single machining technology are solved.

The invention relates to a numerical control machine tool spindle predictive maintenance system, and belongs to the technical field of mechanical equipment health management and intelligent manufacturing. The main shaft driving motor real-time power processing module is used for processing the main shaft driving motor real-time power to estimate and obtain a real-time cutting torque sequence and a real-time main shaft total power sequence, and processing the multiple paths of temperature signals to obtain multiple paths of real-time temperature sequences, and the basic degradation state evaluation module is used for calculating mechanical accumulated damage quantitative indexes based on the real-time cutting torque sequence. And calculating a cumulative thermally induced damage index based on the multi-path real-time temperature sequence, and fusing the mechanical cumulative damage quantitative index and the cumulative thermally induced damage index to generate a basic degradation index. And the robustness and operability of a prediction result in a real industrial environment are remarkably improved.

The invention provides a method for preparing a honeycomb sandwich structure based on laser collaborative explosive welding, and belongs to the technical field of explosive welding. The method comprises the following steps: carrying out laser pretreatment on the surface of a honeycomb core to form a periodically distributed micron-sized pit array; submicron-order holes are constructed in the micron-order pit array based on a nanoimprint lithography method; covering the surface of the plane material with an energetic material layer, and carrying out explosive welding on the plane material and the pretreated honeycomb core by utilizing shock waves generated after the energetic material layer is detonated to obtain a honeycomb sandwich structure; the laser pretreatment adopts femtosecond laser treatment, the power density is 106W / cm < 2 >-107W / cm < 2 >, the pulse width is 100fs-500fs, and the distance between scanning paths is 10mu m-50mu m. According to the method, a metallurgical bonding layer and a residual compressive stress field are formed on the connection interface of the honeycomb core and the plane material through the synergistic effect of laser pretreatment, nanoimprint and explosive welding, crack propagation is inhibited, the fatigue life of a joint is prolonged, and thermal damage is reduced.