67 results about "Laser polishing" patented technology

The invention discloses a perovskite thin film, a photoelectric device and a method for improving the surface quality of the perovskite thin film. The method for improving the surface quality of the perovskite thin film comprises the following steps: S1, preparing the perovskite thin film; s2, performing picosecond pulse laser surface polishing treatment; and S3, guanidine ion implantation and repair: applying a guanidine salt solution to the surface of the perovskite thin film, removing the redundant guanidine salt solution on the surface of the perovskite thin film after the guanidine ions are implanted into the surface of the perovskite thin film, and then carrying out annealing treatment. According to the method, the surface of the perovskite thin film is polished through the picosecond pulse laser, the roughness of the surface of the perovskite is effectively reduced, a surface layer rich in defects is removed, guanidine ions are selectively implanted again through a multi-A-site vacancy structure formed on the surface of the perovskite thin film subjected to laser polishing, multiple hydrogen bonds are formed through the guanidine ions and a perovskite framework, and the surface roughness of the perovskite thin film is effectively reduced. And deep and stable defect passivation and lattice strengthening are realized, and the high-quality perovskite thin film with smooth surface, low defect density and high stability is obtained.

The utility model discloses a three-dimensional dynamic laser polishing line, and relates to the technical field of laser polishing, the three-dimensional dynamic laser polishing line comprises a first electric roller line, a second electric roller line and a third electric roller line which are arranged on the same horizontal line, one end of the first electric roller line is a manual workpiece feeding part, a front polishing mechanism is arranged on the first electric roller line, and the other end of the first electric roller line is provided with a rear polishing mechanism. A workpiece overturning mechanism is installed on the second electric roller line, a reverse face grinding mechanism is installed on the third electric roller line, and the tail end of the third electric roller line is a manual workpiece discharging part. According to the utility model, the pulse laser, the dynamic galvanometer assembly and the plurality of electric roller wires are adopted to polish a product, and laser is utilized to carry out three-dimensional polishing processing on a workpiece, so that environmental pollution and possible mechanical damage to the workpiece are completely eradicated.

Method for producing a workpiece (64) made of quartz glass, which has at least one melt-polished workpiece surface (113) for use in a plasma-assisted manufacturing process, comprising the process steps: a) Providing a workpiece (64) made of quartz glass which has at least one raw surface (111) produced by cutting or machining, and b) Polishing the raw surface (111) to the polished workpiece surface (113) by laser polishing using at least one laser beam (81) moving relative to the raw surface (111), wherein the relative movement is generated by superimposing a translational-oscillating movement and a feed movement, wherein, as a result of the translational-oscillating movement, a quasi-line (87) is generated by a relative velocity between the raw surface (111) and the laser beam (81) above 500 mm / s, and wherein the feed movement has a relative velocity between the raw surface (111) and the laser beam (81) between 1 mm / s and 50 mm / s, c) and wherein a polished workpiece surface (113) is produced which has a micro-roughness and waviness, wherein the white light interferometry at a spatial wavelength λ OMicroroughness measured in the range of 1 µm to 10 µm has a surface roughness Sa of less than 0.5 nm, characterized in that the measurement is taken by means of a white light interferometer at a spatial wavelength in the range λ O Surface roughness (waviness) measured from 100 µm to 1000 µm has a value Sa of more than 5 nm, where the quasi-line (87) has a radiation intensity within the quasi-line (87) on the workpiece (64) between 10 W / cm² 2 and 1000 W / cm² 2 is produced wherein, for laser polishing of an annular end face (80) of a hollow cylindrical workpiece (64), the feed movement comprises rotation of the end face (80) about the longitudinal axis (84), and the translational-oscillating movement comprises a reversing movement of the laser beam (81) between an inner workpiece surface (85) and an outer workpiece surface (86), and wherein the speed of the translational-oscillating movement is set higher in the region of the inner surface (85) than in the region of the outer surface (86).

The embodiment of the specification provides a carbon nanotube laser polishing quality real-time monitoring system and method based on optical coherence tomography (OCT) and secondary ion mass spectrometer (SIMS), an electronic device and a medium, wherein the system comprises: an ultrafast laser polishing device for high-precision laser polishing of a carbon nanotube film according to laser parameters; an OCT optical monitoring system for real-time monitoring of the surface morphology of the carbon nanotube film in the polishing process of the ultrafast laser polishing device, to obtain OCT data; a SIMS chemical component analysis module for detecting the surface element composition and impurity content of the carbon nanotube film before and after polishing, to obtain SIMS data; an intelligent feedback control system for optimizing the laser parameters of the ultrafast laser polishing device based on the OCT data and the SIMS data by using a machine learning algorithm; and a data processing and storage module for storing and analyzing the OCT data and the SIMS data, generating a surface quality evaluation report, and remotely adjusting the laser parameters according to the feedback of the intelligent feedback control system.

This application discloses a laser polishing device and its control method. The laser polishing device includes: a main body containing a processing chamber; an air inlet on one side of the processing chamber; an air inlet pipe connected to the air inlet on one side and to an air source on the other side; an air outlet on the opposite side of the processing chamber; an air outlet pipe connected to the air outlet on one end and to an exhaust device on the other side; a first sensor module installed on the air outlet pipe for detecting the pressure and / or velocity of the airflow within the air outlet pipe; and determining whether a filter module enters a self-cleaning mode based on the information fed back from the first sensor module. This ensures that the cleanliness within the processing chamber meets processing requirements and improves processing efficiency.

The utility model relates to the technical field of laser polishing, in particular to a laser stripping tool which comprises a rotating ring, a plurality of sliding holes are formed in the top of the rotating ring, supporting plates are connected to the inner walls of the sliding holes in a sliding mode, a plurality of driving assemblies are installed at the bottom of the rotating ring, and second air cylinders are fixedly connected to the inner walls of the supporting plates. Limiting holes are formed in the two sides of the inner wall of the supporting plate, a supporting plate is fixedly connected to the output end of the second air cylinder, limiting blocks are fixedly connected to the two sides of the supporting plate, the limiting blocks are slidably connected with the inner walls of the limiting holes, adjusting assemblies are installed on the inner wall of the supporting plate, and a mounting groove is formed in the top of the supporting plate. And the inner wall of the mounting groove is rotationally connected with a rotating shaft. The driving assembly drives the clamping arms to move, the ends of the clamping arms clamp and fix the outer wall of a product, meanwhile, downward force is applied to the product, the bottom of the product can be firmly fixed to the top of the supporting table, and the stability of product installation is guaranteed.

A mobile processing chamber for laser polishing of glass workpieces comprises a workpiece carrier, a shielding element for the laser radiation used in the polishing process, and a protective enclosure. The shielding element is designed and positioned to surround a receiving area for the workpiece to be polished on the workpiece carrier, thus shielding the workpiece carrier from direct exposure to the laser radiation during the polishing process. The protective enclosure, either alone or in conjunction with the workpiece carrier, forms a closed chamber around the surface of the inserted workpiece to be polished and has a removable lid. The workpiece carrier, shielding element, and protective enclosure are made of materials that can withstand temperatures up to at least 500 °C. The material of the workpiece carrier is additionally selected to have a low thermal conductivity, preferably less than 10 W / (m K).The mobile processing chamber enables laser polishing of glass workpieces on an industrial scale with high yield.

The application provides a simulation prediction analysis method for laser polishing of a microtopography and roughness of a diamond surface, and comprises the following steps: creating a mapping relationship data table of laser parameters and laser spot size and power density; establishing a mapping relationship model diagram of laser spot power density, pulse width, laser incidence angle and diamond surface ablation pit depth; constructing an analysis model of a laser spot stacking state; generating a simulation image of the microtopography of the laser polished diamond surface; and predicting the roughness of the laser polished diamond surface. The application takes the machining parameters of laser spot power, pulse width, repetition frequency, defocusing amount, incidence angle, transverse scanning rate and longitudinal stepping interval as inputs, takes the microtopography and roughness of the laser polished diamond surface as outputs, and establishes a mapping relationship between the inputs and the outputs through simulation analysis of the size of the ablation pit, the spot scanning path and the spot stacking state, so as to guide the optimization of the laser polishing process parameters.

The invention provides a three-step polishing method for suppressing high-frequency errors in CO2 laser polishing of a fused quartz element, and belongs to the technical field of laser processing of optical elements. The invention aims to solve the problem that the optical transmission performance and the laser damage resistance of a fused quartz element are severely influenced by medium-high frequency error induced far-field light modulation and high-frequency error induced near-field light field enhancement when the fused quartz element is processed by laser. The method comprises the first step of laser preheating, the second step of high-speed multi-layer polishing and the third step of low-speed single-layer polishing, laser polishing movement tracks and polishing parameters of the corresponding steps are drawn, medium-high frequency and high-frequency errors of the surface of the fused quartz element subjected to laser polishing are greatly reduced, the machined surface almost has no surface knife lines, and the surface quality is improved. And the far-field light modulation and near-field light field enhancement effects are effectively reduced.

The invention discloses an on-site laser polishing metallographic detection method in a high-temperature environment, and aims to solve the problems of equipment damage, tissue distortion, low efficiency and the like in existing detection. The method comprises the following steps: fixing a detection device through a bracket, acquiring temperature and material parameters, calling an optimal combination parameter database to match polishing and oxidation time, carrying out precise laser focusing polishing and high-temperature natural oxidation, switching a microscope station to carry out metallographic detection, and transmitting an image to a mobile display end in real time. According to the method, in-situ nondestructive testing is achieved, the polishing precision is high, the high-temperature adaptability is high, parameters are automatically matched, the detection efficiency is greatly improved, and the method is suitable for state evaluation of key equipment under various high-temperature working conditions.

The invention belongs to the technical field of laser processing. According to the laser polishing device and method, a laser generator is used for generating pulse laser; the focusing and coupling unit is used for focusing and coupling the pulse laser, so that the laser is efficiently transmitted in the optical fiber; the homogenizing optical fiber is used for homogenizing and shaping the laser pulse to obtain a square flat-topped laser spot; the light spot shaping unit is used for controlling the size of the square flat top light spot, so that the laser is coupled into the galvanometer; and the scanning galvanometer is used for controlling the pulse laser and the diamond to move relatively, the distance between the light spots is the diameter of the light spots by controlling the laser scanning speed and the linear distance, and the diamond is scanned and polished on a preset scanning route. By controlling the laser scanning speed and the line spacing, the spacing between the light spots is the diameter of the light spots, so that diamond polishing with uniform energy and high efficiency is realized, and the processing time consumption is greatly reduced.

The utility model relates to the technical field of glass surface polishing, and particularly discloses an optical glass surface polishing device based on ultrafast laser, which comprises a dustproof shell, a control end is embedded in one side of the outer wall of the dustproof shell, and a laser polishing equipment main body is fixedly mounted at the top end of the dustproof shell. A grinding head is embedded in the end, penetrating into the dustproof shell, of the laser grinding equipment body, fixing plates are fixedly installed at the two ends of the dustproof shell, and an adjusting mechanism is arranged on one side of each fixing plate. According to the optical glass polishing machine, after optical glass is adsorbed and fixed through the vacuum chuck body embedded in the sliding table, the position can be adjusted in multiple axial directions after the optical glass enters the dustproof shell, the optical glass polishing machine is suitable for polishing different positions of the optical glass, and meanwhile large optical glass protoembryos can be carried for polishing treatment; the situation that the machining efficiency is low due to the fact that a plurality of pieces of optical glass meeting the size need to be cut and graded grinding is carried out is avoided, and the machining efficiency of the optical glass can be improved on factories or production lines.

A pressing tool has a support structure made of sheet steel. The pressing tool is formed by a press plate or endless belt and configured to press material panels in hot presses. The support structure of the pressing tool thereby has a coarse structure with a depth of at least 150 μm produced by at least one processing operation. At least a partial region of the coarse structure is rounded by laser polishing. The surface of the pressing tool has a fine structure produced by at least one processing operation. Further, a method manufactures the pressing tool and a method manufactures a material panel using the pressing tool.

The invention discloses a surface roughness and heat dissipation performance collaborative optimization method for a power supply heat dissipation shell, and relates to the technical field of heat management, and the method comprises the steps: constructing a roughness-heat dissipation efficiency response model, and building a heat dissipation performance function with a roughness value as a core variable and a flow rate, a heat source temperature and a loading pressure as correction parameters; defining a working condition adaptive roughness optimization interval; roughness-pressure coupling control of interface thermal resistance is carried out, and a gradient rough structure is adopted at the interface of a heat dissipation shell and a heat source; pre-tightening force is applied to enable the interface to be plastically deformed; based on real-time optimization execution of digital twinning, flow velocity is monitored through an embedded micro differential pressure sensor, and processing parameters are dynamically adjusted in combination with feedback of an infrared temperature array; and when it is detected that the ratio of the flow velocity to the critical flow velocity threshold value is smaller than a set threshold value, the laser polishing module is activated to reduce the roughness value to the lower limit value of the set interval. According to the method, the universality law of directivity reversal of the roughness effect is established, and the relation between the roughness and the heat dissipation performance is quantified.

The invention discloses a metal workpiece surface crack repairing method and device based on a continuous laser polishing technology, belongs to the technical field of metal repairing engineering, and realizes selective cladding and metallurgical bonding of a crack area and synchronous completion of crack filling and surface strengthening by accurately controlling laser energy density and heat input under the protection of inert gas. The core scheme comprises the following steps: 1) performing three-dimensional scanning positioning on cracks; 2) laser-powder synchronous coupling repair; and (3) gradient annealing is performed to control residual stress. Laser polishing parameters are determined according to the crack filling depth equation, the surface flatness is controlled in combination with a molten pool oscillation equation, and the stability of a molten pool formed by metal liquid after laser polishing of metal is evaluated and calculated. And after polishing, observing under an electron microscope, and monitoring whether the surface hardness after polishing reaches the standard or not through a hardness control model. And then, a thermal-mechanical coupling model is adopted to predict the magnitude of residual stress generated in the laser repairing process, and a theoretical basis is provided for gradient annealing process parameters.

The application provides a high-quality laser polishing method based on surface micro-texture induction, comprising the following steps: setting geometric parameters of a micro-texture induction layer of a workpiece polishing surface; machining the set micro-texture induction layer on the workpiece polishing surface; ultrasonic cleaning the workpiece polishing surface with the micro-texture induction layer; placing the workpiece into a closed argon atmosphere; setting laser machining parameters and laser scanning paths according to physical properties of the workpiece metal material and the structure of the micro-texture induction layer; and performing laser polishing treatment on the workpiece polishing surface according to the laser machining parameters and the laser scanning paths. The method can make the melt flow more uniform and regular by machining the micro-texture induction layer on the polishing surface before laser polishing, and is beneficial to the improvement of the surface quality and physical properties of the workpiece after laser polishing.

The invention provides a laser cleaning and laser polishing combined machining device and method.The laser cleaning and laser polishing combined machining device comprises a rack, a fixing frame and a machining translation table, a first transverse moving assembly used for driving the machining translation table to transversely move is arranged at the bottom of the rack, and the fixing frame is fixedly installed at the top of the rack; the laser cleaning and polishing device further comprises a laser cleaning and polishing two-in-one assembly and a coaxial blowing assembly, a second transverse moving assembly used for driving the laser cleaning and polishing two-in-one assembly to transversely move is arranged at the top of the fixing frame, and a fixing plate and a rotating assembly used for driving the fixing plate to vertically rotate are arranged at the output end of the second transverse moving assembly. Two functions of laser cleaning and laser polishing are integrated, workpieces do not need to be switched between different devices, the loading, unloading and carrying time of the workpieces is shortened, the machining efficiency is greatly improved, meanwhile, the machining position and angle can be rapidly and accurately adjusted through cooperative movement of the transverse moving assembly and the rotating assembly, and the machining period is further shortened.

The application relates to a preparation method of high-performance rare earth permanent magnet materials and belongs to the technical field of magnetic materials. The application discloses a preparation method of high-performance rare earth permanent magnet materials, which comprises the following steps: S1, placing neodymium iron boron flake materials on a sample table of a conveying belt, and when the flake materials are conveyed to a laser polishing table by the conveying belt, irradiating the surface of the flake materials by using a laser light source with an energy density of 0.5-3.5 J / cm 2 2, and performing laser polishing; the translation speed of the conveying belt during irradiation of the laser light source is 0.7-1.5 cm / s; S2, conveying the flake materials after laser polishing to a diffusion workbench, coating diffusion source solutions obtained by mixing alloy powders and organic solvents on the double surfaces of the treated flake materials, and sequentially performing hot air drying; S3, transferring the flake materials to a diffusion furnace; S4, performing aging heat treatment on the flake materials; after aging is completed, immediately filling nitrogen or other inert gases into the furnace, and air cooling to 60-80 DEG C, so that the flake materials can be taken out of the furnace.

A fused quartz laser polishing method coupled with a temperature feedback control system comprises the following steps that firstly, a thermal imaging instrument is used for conducting real-time temperature measurement on a laser polishing area of fused quartz; then, a real-time temperature signal measured by the thermal imaging instrument is transmitted to the PID controller; and then the PID controller is used for dynamically regulating and controlling the output power of the laser according to the input real-time temperature signal. Through the closed-loop control, the temperature of the laser processing area of the fused quartz is slightly lower than the evaporation temperature of the fused quartz stably, and the dynamic precise adjustment of the laser power is realized. According to the control strategy, uncontrollable evaporation and condensation caused by local overheating or alternate cooling and heating of the fused quartz are prevented, and more importantly, the phenomenon of uneven surface tension change caused by severe temperature fluctuation is eliminated to a great extent, so that the formation of scanning ripples on the surface of the fused quartz is remarkably reduced, and the polishing quality and the process stability are improved.

This invention belongs to the technical field of hemispherical resonator gyroscope manufacturing and discloses a laser polishing method for hemispherical resonators. The method includes: cleaning a ground hemispherical resonator to remove surface impurities, followed by drying; clamping the hemispherical resonator on a five-axis linkage platform, and sequentially scanning the outer and inner surfaces of the hemispherical resonator according to a set trajectory using a controlled laser, thereby performing melt polishing of the outer and inner surfaces, reducing surface roughness while repairing subsurface damage; finally, annealing the laser-polished hemispherical resonator to eliminate residual stress. Compared with existing technologies, this invention effectively solves the problems of low processing efficiency and inability to completely remove subsurface damage layers in existing polishing methods for hemispherical resonators. Furthermore, it eliminates the chemical corrosion step in existing processes, thus improving the production efficiency of hemispherical resonators and being more environmentally friendly.

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 high-temperature environment field laser polishing metallographic detection device which comprises a support, a laser polishing machine, a high-temperature-resistant electron microscope, a temperature sensor, a controller, a mobile display end, a laser polishing machine fine adjustment assembly and a driving assembly. The support adapts to fixing requirements of different devices, and an optimal combination parameter database is built in the controller. The temperature sensor collects field temperature, and the controller automatically matches polishing and oxidation parameters in combination with input equipment material information; the fine tuning assembly realizes precise focusing of laser, and the driving assembly switches microscope stations to avoid interference; and the image is wirelessly transmitted to a mobile display end after being preprocessed. The device realizes high-temperature field in-situ nondestructive testing, adapts to a wide temperature range from-20 DEG C to 1400 DEG C, greatly improves the detection precision and efficiency, and meets the emergency detection requirements.

This invention provides a method and apparatus for power energy compensation in pulsed laser polishing of curved surfaces. The method includes: discretizing the surface to be processed into a lattice matrix to obtain the three-dimensional coordinates of the processing points; calculating the local normal vector of the processing points; calculating the incident angle between each point and the normal vector under the incident direction of the laser; establishing an empirical compensation formula based on the influence of the incident angle on the effective energy coupling, using surface roughness Sa as the calibration index, and calculating the compensation power at each point; and performing power compensation by adjusting the laser output power during the polishing process. This method is applicable to curved surface polishing scenarios with a wavelength of 1064nm pulsed laser, a spot diameter of 0.5mm, and a scanning speed of 10–5000mm / s, and can improve the consistency of Sa and the process stability after polishing the entire curved surface.

The application discloses a laser processing-based supercritical CO2 energy conversion system pipe inner wall reinforcing method, and steps are as follows: a high-power and large-spot laser cladding process is used to clad a Fe-Cr base layer on a low alloy steel pipe inner wall; a variable-power, small-spot and variable-powder rate laser cladding process is used to clad a Fe-Cr-Si intermediate layer on the surface of the Fe-Cr base layer; a high-power and large-spot laser cladding process is used to clad a Fe-Cr-Al top layer on the surface of the Fe-Cr-Si intermediate layer; and a low-energy and large-spot laser polishing is used to obtain a composite reinforcing layer on the pipe inner wall. The application gradually introduces Al and Si elements to the reinforcing layer through a multilayer cladding method, prevents the generation of penetrating cracks, and finally forms a micro-melt layer on the surface of the reinforcing layer by laser polishing, strengthens the mutual diffusion of Cr, Al and Si elements, uniformly distributes the near-surface elements, improves the corrosion resistance of the reinforcing layer, and makes up for the limitations of the traditional laser cladding process, such as forming difficulty and frequent crack generation, after high-content Al and Si corrosion-resistant elements are introduced.

The application discloses a kind of laser polishing device for shell parts, including laser polisher and polishing production line, the polishing production line includes conveying mechanism, lifting column and belt polishing transmission machine.In the present application, belt polishing transmission machine and laser polisher are arranged, belt polishing transmission machine includes transmission belt, and a plurality of laser polisher is arranged on the outer periphery of transmission belt, after belt polishing transmission machine enters the inner cavity of tire, the laser polisher on transmission belt will be opposite to the inner peripheral wall of tire and the two side walls opposite in tire, by controlling transmission belt operation, the inner peripheral wall and the inner side wall of tire can be polished, with the advantage that the inner cavity wall of tire is polished after clamping tire once, thereby the cost of polishing investment can be greatly reduced, and a kind to be used for shell parts laser polishing method based on laser polishing device is also disclosed, the method makes the polishing of the present device more stable, and the quality after polishing is higher.

The embodiment of the specification provides a system and method for laser processing carbon-based chips, wherein the system comprises: a multi-wavelength laser emission module for emitting laser beams suitable for carbon-based chips with different crystal structures according to laser parameters; an intelligent control device for dynamically adjusting the laser parameters according to the thermal and optical characteristics of the carbon-based chips based on a processing strategy, and sending the laser parameters to the multi-wavelength laser emission module; an adaptive machine learning module for optimizing the processing strategy for the processing characteristics of the carbon-based chips according to monitoring data, and sending the optimization results to the intelligent control device; a micro-nano laser polishing device for processing the surface of the carbon-based chips; a cutting mechanism for performing hidden cutting of the carbon-based chips; a multi-modal sensing and analysis system for monitoring the structural integrity of the carbon-based chips during processing, and sending monitoring data to the adaptive machine learning module.

The utility model discloses a surface polishing device of a full-automatic laser machine, relates to the technical field of polishing devices, and aims to solve the problem that in the prior art, the printing and engraving effects of objects with rough surfaces are poor, and the surface polishing device of the full-automatic laser machine comprises a laser machine body, a polishing mechanism is installed on a table top of the laser machine body, a conveying mechanism is arranged below the polishing mechanism, and the polishing mechanism comprises a fixing frame and a first push rod motor fixed to the inner wall of the top of the fixing frame. An object is placed on the conveying belt, the conveying belt drives the object to move to the position under the polishing roller, the second push rod motor extends to enable the two clamping plates to be close to each other to clamp and fix the object, and then the first push rod motor extends to drive the polishing roller to move downwards. And the conveying belt for bearing the object is supported in cooperation with the fixing frame and the supporting rod below, and the position, to be subjected to laser engraving, of the top of the object can be polished.

The invention relates to a control method and device for secondary shaping of a valve seat, and relates to the technical field of fluid control devices.The method comprises the steps that a front image of the valve seat is collected; determining a shadow abnormal position when the shadow abnormal feature exists in the front image of the valve seat; an abnormal position exposure image is collected, and the shadow abnormal position is analyzed to determine an abnormal type; when the sunken feature exists in the abnormal position exposure image, a push plate preset on the first detection station is controlled to push the valve seat and fall into a waste box; when the projection features exist in the abnormal position exposure image, determining the projection contour range of each projection feature, and screening out the maximum contour; when the maximum contour is not smaller than the preset reference contour area, a preset laser polishing method is used for processing; and when the area of the maximum contour is smaller than that of the reference contour, processing is conducted through a preset overturning and grinding method. The method has the effect of improving the product percent of pass and the production efficiency.

The invention relates to the technical field of laser polishing, and discloses a laser and plasma collaborative polishing device and method.The laser and plasma collaborative polishing device comprises a first light path used for transmitting first laser; the second light path is used for transmitting the second laser; the beam combining and focusing assembly is arranged on the light emitting side of the first light path and the light emitting side of the second light path, combines the first laser and the second laser and enables the first laser to be focused to form a first focus and the second laser to be focused to form a second focus respectively; the first focus is located at a first height of the surface of the to-be-polished sample, and the second focus is located at a second height of the surface of the to-be-polished sample; the first focused second laser is used for preheating and activating the surface of the to-be-polished sample, and the second focused first laser is used for generating plasma to polish the preheated to-be-polished sample. The problems that in the prior art, due to the fact that the surface of a sample is directly machined through laser, the surface roughness is large, and the optical-level or atomic-level surface roughness cannot be achieved are solved.

The invention discloses a hybrid welding device based on three-beam laser collaborative operation and a welding method of the hybrid welding device, and belongs to the technical field of laser hybrid welding. The device comprises a computer, a multi-laser master control system, a high-power continuous MOPA optical fiber laser, a Q-switched pulse optical fiber laser, an Nd: YAG laser, a laser welding system, a laser forging system, a laser polishing system, a mechanical arm and a temperature sensor. According to the method, three laser processes of laser welding, laser forging and laser polishing are integrated in a continuous process, and a computer is matched with all systems, so that the apparent quality of a welding seam is improved, the roughness is reduced, the residual stress is regulated and controlled, and microdefects are reduced in one process at the same time; and the processing efficiency and the comprehensive performance of the joint are obviously improved. According to the method, the plastic deformation resistance of weld metal can be reduced, the effect of eliminating defects and implanting pressure stress through laser forging can be improved, and the polishing efficiency and precision can be improved.