190 results about "Surface integrity" patented technology

The invention provides a visual detection device and method for building engineering wall quality, and the method comprises the steps: firstly obtaining a multi-angle image set of a to-be-detected wall, which comprises surface images and internal structure scanning images under different illumination conditions, and then carrying out the visual feature extraction of the multi-angle image set, according to the method, a comprehensive visual detection feature set covering surface integrity, internal crack distribution and material uniformity features is obtained, defect area positioning processing is performed on the comprehensive visual detection feature set based on a preset quality evaluation rule, a defect distribution map is generated, and then a visual quality report is generated according to the defect distribution map. And finally, the visual quality report is transmitted to terminal equipment to trigger wall maintenance operation, so that comprehensive and accurate detection and visual presentation of the wall quality are realized, wall maintenance can be effectively guided, and the construction engineering wall quality guarantee level is improved.

The invention discloses a preparation method of a nickel-based tungsten carbide laser cladding wear-resistant gradient coating, which comprises the following steps: step 1, preparing mixed powder of a transition layer, a functional layer and a repair layer; step 2, pretreating a matrix: removing oxide skin on the surface of the matrix, polishing to be smooth, and preheating the matrix to 350-500 DEG C; step 3, sequentially preparing a first functional layer, a transition layer, a second functional layer and a repair layer by adopting a laser cladding process; and 4, coating post-treatment is conducted, specifically, the surface of the repairing layer is polished to the specified thickness, and the defect-free wear-resistant gradient coating is formed. Through gradient component layered design, the functional layer adopts high tungsten carbide content to maximize wear resistance, and the transition layer relieves thermal expansion difference between the coating and a matrix, reduces interface stress and reduces crack initiation; according to the repairing layer, micro-cracks and air holes generated in the cladding process are filled through low-hardness nickel-based components, and the compactness and surface integrity of the coating are remarkably improved.

The invention relates to the technical field of three-step fine polishing methods for 19nm wafer regeneration, discloses a fine polishing method named'three-step fine polishing method for 19nm wafer regeneration ', and aims to solve the technical contradiction between macroscopic planarization and microscopic surface integrity of regenerated wafers in advanced process nodes. The method is characterized by comprising a first fine polishing step, a second fine polishing step and a third fine polishing step, and in each step, gradient decreasing polishing pad hardness, abrasive particle size and concentration, polishing pressure and pH value are adopted; and an on-line process monitoring and self-adaptive feedback control subsystem is used for assistance. By adopting the technical scheme, defects can be efficiently removed, damage can be repaired step by step, the wafer surface with ultralow defect density and excellent chemical stability is obtained, the requirements of the manufacturing process of 19nm and more advanced semiconductors are met, and the yield is increased.

The invention belongs to but not limited to the technical field of aviation, discloses a surface integrity constrained aircraft engine blade grinding and polishing process optimization method and system, and establishes a material removal model of a blade based on an orthogonal center combination experiment data set. And model input and output of machine learning are set, data are preprocessed, and the completeness of the grinding and polishing surface is predicted through a machine learning XGBoost algorithm. And obtaining multiple groups of solutions of the optimization variables according to an MSPSO particle swarm multi-objective optimization algorithm. And according to the multiple groups of solutions of the optimization variables, screening out a priority solution of each optimization target and a global optimal solution conforming to all constraints and optimization targets. According to the method, through analysis of a grinding and polishing experiment data set, a material removal model of the blade is established, and a material removal coefficient is calibrated. The model can quantitatively describe the influence of each process parameter on the material removal depth, and provides theoretical support for quantitative and accurate grinding and polishing processing of the aircraft engine blade.

The invention relates to a top-cover-free rectangular concrete body inner mold demolding device and demolding method.According to the top-cover-free rectangular concrete body inner mold demolding device, through innovative structural design, a rectangular inner mold is divided into two angle molds and two L-shaped molds, and a track extending by a specific angle (45 degrees in the horizontal direction) and an intermittent driving device are matched. During demolding, the intermittent driving device can accurately drive the two angle molds to synchronously slide inwards firstly, the contact area and friction force between the inner mold and a concrete body are effectively reduced, then the two L-shaped molds are driven to synchronously slide inwards, and the whole demolding process is completed. Compared with a traditional demolding mode, the demolding efficiency is greatly improved, and the demolding time is shortened; by the adoption of the gradual demolding mode, direct beating and violent disassembly of the mold and the concrete body are avoided, the risk that the inner mold and the concrete body are damaged is effectively reduced, the surface integrity and the internal structural strength of the concrete body are guaranteed, the service life of the inner mold is prolonged, and the production cost is reduced.

The invention provides a nickel-based high-temperature alloy cutting microstructure prediction method based on a dislocation gradient model, and aims to realize optimization of process parameters through multi-scale modeling. The method comprises the following steps: firstly, calculating dislocation mobility under different temperature and pressure conditions by utilizing molecular dynamics simulation; and a dislocation generation and annihilation rate model is established in combination with a dislocation dynamics theory, so that a dynamic relationship between cutting strain and dislocation evolution is disclosed. And further through data fitting, a constitutive equation between the dislocation density and the material hardening behavior is constructed, and the evolution law of the dislocation cell structure is described emphatically. On an ABAQUS platform, a two-dimensional cutting model containing a thermal coupling effect is established, a dislocation density constitutive equation is embedded into a user-defined material module, and closed-loop correlation of macroscopic cutting parameters and microstructure evolution is achieved. According to the method, the dislocation density is creatively used as a cross-scale bridge, the understanding of a dynamic recrystallization and dislocation motion coupling mechanism in the cutting process is deepened, a prediction model is provided for technological parameter optimization, and the method has important engineering guiding significance for improving the integrity of the machined surface of the high-temperature alloy part.

The utility model provides a nanoscale precision machining surface integrity detection device for precision machining, which belongs to the technical field of detection devices and comprises a machine body, a platform is arranged in the machine body, a rotating mechanism is arranged in the platform, and the rotating mechanism comprises a mounting seat, a driving motor, a speed reducer, a rotating rod and a turntable. According to the utility model, through the arrangement of the rotating mechanism, the placing disc can rotate orderly, the workpiece on the placing disc can be rapidly detected by matching with the use of an image detector, and through the arrangement of the clamping mechanism, the workpiece is kept stable in the detection process and is prevented from moving or rotating in the detection process, so that the detection efficiency is improved. The safety of the whole detection process can be ensured, the image detector can be driven to sweep or move on the to-be-detected surface of the workpiece through the arrangement of the first moving mechanism and the second moving mechanism, and it is ensured that the image detector can cover all the to-be-detected surfaces of the workpiece.

The present invention relates to a combined process of ultra-precision grinding and photochemical mechanical polishing of laser crystal slices. The process comprises the following steps: using a coarse-grained grinding wheel for rough grinding to achieve rapid thinning and determine the depth of the subsurface damage layer, providing a reference for the grinding wheel feed rate in the fine grinding stage; using a fine-grained grinding wheel for fine grinding to remove the damage layer introduced in the rough grinding stage, and obtaining higher surface / subsurface quality and surface accuracy by optimizing process parameters; using aluminum oxide (Al2O3) abrasives to prepare a special polishing liquid for photochemical mechanical polishing, and performing semi-fine polishing on the laser crystal slices to quickly remove the surface damage caused in the grinding stage; using zirconium oxide (ZrO2) abrasives to prepare a special polishing liquid for photochemical mechanical polishing, and performing fine polishing on the laser crystal slices to further optimize the surface quality and surface accuracy; and using an ultrasonic cleaner to clean the laser crystal slices, with anhydrous ethanol as the cleaning agent. The present invention can simultaneously achieve high surface integrity and high-efficiency processing of laser crystal slices.

The invention relates to the technical field of building ceramics, and particularly discloses a high-gloss light-weight glazed brick and a preparation method thereof.The preparation method comprises the steps that 1, composite high-aluminum mud, expanded perlite, nano-zirconia and graphene are mixed and subjected to ball milling, and green body powder is obtained; step 2, carrying out compression molding on the green body powder to form a green body, applying ground glaze on the green body, carrying out ink-jet printing, and carrying out shower coating of transition glaze and high-transmittance wear-resistant glaze to obtain a green brick; and step 3, drying the green brick prepared in the step 2, sintering, and carrying out composite polishing to obtain the high-gloss light glazed brick. The prepared high-gloss light-weight glazed brick not only has higher Moh's hardness, but also has the characteristic of remarkable light weight, so that the weight of the brick body is greatly reduced, the brick body also has higher wear-resistant grade and glossiness, scratches and wear in daily use can be effectively resisted, and the completeness and attractiveness of the surface can still be kept after the brick is used for a long time.

The invention discloses a polycrystalline tungsten cutting surface performance regulation and control method which comprises the following steps: selecting high-purity tungsten powder, carrying out heat treatment after high-temperature sintering, removing an oxidation film and a rough layer to obtain a polycrystalline tungsten blank, selecting the polycrystalline tungsten blank with qualified density, carrying out high-temperature heating, carrying out forging, refining the average grain size of polycrystalline tungsten, and after the forging is finished, carrying out heat treatment on the polycrystalline tungsten powder to obtain the polycrystalline tungsten cutting surface performance. And the fine-grain tungsten sample is subjected to annealing treatment, the fine-grain tungsten sample is polished, and the fine-grain tungsten sample obtained after treatment is subjected to single-point diamond turning. According to the fine-grain tungsten treated through the high-temperature forging process, microcrack propagation can be effectively restrained, surface defects are reduced, then the surface integrity of a turned sample is improved, a continuous ultra-fine grain surface layer can be generated on the surface, and the irradiation resistance and corrosion resistance of the fine-grain tungsten are improved.

The invention discloses a high-temperature and high-pressure testing device for a rock test, and particularly relates to the technical field of rock testing, the high-temperature and high-pressure testing device comprises a shell, the inner surface of the shell is fixedly connected with a first partition plate and a second partition plate, and the upper end of the second partition plate is provided with a bagging assembly and a pushing steering assembly. According to the high-temperature and high-pressure testing device for the rock test, the bagging assembly is arranged, so that a rubber film bag can be tightly attached to the outer surface and the left end face of a cylindrical rock, and in a high-temperature and high-pressure test, the surface integrity and the structural stability of the cylindrical rock during the test can be maintained; the outer cylindrical surface seal can prevent scratch wear caused by friction and collision with test device components, the rock mechanical property and test result accuracy are guaranteed, the sealed end surface can prevent surface moisture evaporation and sun crack of porous or easily-weathered rocks due to environmental change, the rock structure is maintained to be stable, and the consistency of rock performance in the test process is guaranteed.

The application relates to the technical field of steel metallurgy, and discloses a rolling process for improving the surface quality of C70S6 non-adjustable steel, which comprises the following steps: S1, a heating process; S2, a descaling process; S3, a rolling process; S4, a cooling process; and S5, a finishing process.The process can significantly reduce thermal stress cracks, the temperature uniformity of the casting blank from the surface to the core is improved through a three-stage heating mode and precise heat preservation control, the thermal stress is effectively released, the anti-collision and spacing control during charging are combined, local overheating or overcooling is avoided, the occurrence rate of surface micro-cracks and corner transverse cracks is reduced by more than 80%, and the surface integrity of the casting blank is greatly improved.The process can completely solve the iron oxide scale defects, the double high-pressure water descaling process after the furnace and before the medium rolling is adopted, the optimized combination of the descaling pressure and the water flow speed ensures that the residual area of the iron oxide scale is less than or equal to 3%, the iron oxide scale pressing-in defects are completely eliminated, and the surface cleanliness of the steel is significantly improved, thereby providing a high-quality base for subsequent processing.

A preparation method of a Ti-5553 titanium alloy plate with a grade fine grain double-state structure adopts cross-phase transformation point free forging to prepare a Ti-5553 titanium alloy plate blank, in the cross-phase transformation point free forging, the initial forging temperature of a forging stock is in a temperature zone of 45-95 DEG C above the phase transformation point, the lower limit of the final forging temperature is 650 DEG C, short-process and low-cost preparation of the plate blank is achieved, and the production cost is reduced. And the surface integrity and the deformation uniformity in the thickness direction of the plate blank in the hot rolling process in the temperature zone below the subsequent phase transformation point are guaranteed through the fine grain structure. According to the method, the strain range of a single pass is 0.2-0.25, the strain value of the single pass is larger than or equal to the critical formation strain of DDW of the Ti-5553 alloy, and therefore the number of DDW in the alloy can be increased through hot rolling in the temperature zone below the phase transformation point of each pass. The DDW in the plate is sharply increased after multi-pass hot rolling in the temperature zone below the phase transformation point, and grain refinement is sufficient. The microscopic grain size of the Ti-5553 hot-rolled plate prepared by the method is higher than 7 grade.

The application provides a processing parameter optimization method based on a GRA-CRITIC-TOPSIS method and processing surface integrity multi-indexes, and belongs to the technical field of high-efficiency precision processing. In view of the problems that the influence of processing parameters on workpiece surface integrity multi-indexes is complex in difficult-to-machine material milling processing, and the expected results of various indexes are contradictory, the grey correlation analysis method (GRA), the CRITIC objective weighting method and the ideal point method (TOPSIS) are organically combined, and a more scientific and comprehensive multi-objective processing parameter comprehensive optimization model is constructed. The method introduces the CRITIC objective weighting, the weight calculation is more reasonable, the index information overlap can be effectively avoided, and the optimization result has higher engineering reliability.

The application relates to a bending and overturning mechanism, which comprises a fixed die, a movable die capable of moving towards the fixed die, a punch arranged on the movable die, a shaping mechanism arranged on the side close to the movable die of the fixed die, a fixed seat, two symmetrically arranged sliding blocks in a curved sliding groove and corresponding elastic members, the sliding block has a material bearing plane, the material bearing planes of the two sliding blocks are coplanar to form a placing plane in a non-working state, and the punch pushes the metal plate to bend and drives the sliding blocks to move along the curved groove in a working state. The bending and overturning mechanism synchronously deforms the sliding blocks with the metal plate due to the above-mentioned structural design, effectively solves the plate scratch problem in traditional bending, and improves the forming quality and surface integrity.

This invention discloses a precision grinding process for machining the shaft of a swimming pool pump motor, relating to the field of shaft precision grinding technology. The process includes: Step 1: Establishing an incident window using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone, first wetting and then introducing the load, and recording the incident window, jet posture, and dressing rhythm as working condition metadata; Step 2: After precision grinding, according to the material type, magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress, and combining this with cleanliness to generate a surface integrity label and bind it to the working condition metadata; Step 3: Performing deionized ultrasonic cleaning and rinsing according to the label to remove chloride salts and free iron, rebuilding the passivation film according to specifications using chemical passivation, controlled drying, and clean sealing; Step 4: Under the premise of qualified chemical condition, performing isotropic ultra-finishing and low-plasticity rolling on the sealed working zone to form surface compressive stress and maintain geometric tolerances, quickly indicating inspection and writing back the label.

The invention relates to rotary cutting disc cutting equipment and technology for bathroom towel rack production, and belongs to the technical field of cutting equipment.The equipment comprises a machine base, a guide rail frame, a clamping assembly I, a clamping assembly II, a supporting arm, a cutting mechanism, an electric push rod and a supporting assembly; according to the pipe cutting device, force is evenly applied through alternate clamping and hydraulic linkage, the pipe is prevented from being deformed and scratched, a V-shaped positioning groove of the supporting assembly is matched with a clamping plate, the clamping assembly I is used for pushing the pipe to move in the clamping assembly II, and the supporting assembly is arranged below the cutting mechanism and used for clamping the pipe at the cutting end and driving the pipe to incline when the pipe is cut off. During cutting, the pipe is guided to incline, a blade is prevented from being clamped and blocked, meanwhile, an internal cleaning assembly is linked with feeding, cutting slag is synchronously discharged, the inner wall of the pipe is supported, the equipment is high in cutting precision, the surface integrity of the pipe is good, and the service life of a cutter is long.

The application provides an adjustable wire cutting machining device and a data processing method thereof, and relates to the field of wire cutting machining.The adjustable wire cutting machining device comprises a base, a machining table is fixed at the top of the front end of the base, a protection frame is arranged at the outer circle of the machining table and is fixed at the top of the base, and a power control cabinet is arranged at the right side of the protection frame.Through multi-stage data collection of primary, secondary, tertiary and standby collection modules and in combination with data processing of a 3D modeling end, omnibearing monitoring of the machining process is realized, the "difference degree" of each stage is calculated by comparing the actually measured data with the theoretical model data, and iterative and forward-looking process parameter compensation is carried out by using a correction module.This closed-loop self-adaptive control can dynamically correct the cutting path, energy input and cooling condition, effectively compensate the size deviation and thermal deformation generated in the machining process, and thus significantly improve the size precision, geometric shape precision and surface integrity of the final workpiece.

The present invention relates to the field of laser alloy technology, and discloses a laser alloy of MoSiCuPtReIrW powder, a composite coating and a preparation method of the composite coating, aiming to solve the problems of easy deformation and cracking, insufficient oxidation resistance and wear resistance of the laser alloying layer caused by the traditional laser alloying powder ratio. The laser alloy of MoSiCuPtReIrW powder is composed of the following raw materials: Mo, Si, Cu, Pt, Re, Ir, W. The present invention proposes to add rare elements Pt, Re, Ir, and W on the basis of common laser alloying powder ratio elements such as Mo, Si, and Cu, so as to solve the defects of easy deformation and cracking, insufficient oxidation resistance and wear resistance of the laser alloying layer caused by the traditional powder ratio. Based on the synergistic strengthening mechanism of the multi-element alloy components, the prepared composite coating exhibits excellent antioxidant stability and corrosion resistance, and can still maintain stable surface integrity under high-temperature friction conditions.

The invention provides a grinding device for building house steel part machining, and relates to the field of grinding devices.The grinding device comprises a working support, and a limiting guide plate is vertically and fixedly connected to the inner side of the upper end of the working support; the tensioning auxiliary shaft is arranged at the upper end of the limiting guide plate; the two positioning fulcrum shafts are respectively arranged on the left and right sides of the lower end of the limiting guide plate; the driving auxiliary shaft is vertically and rotatably arranged on the outer side of the tensioning auxiliary shaft; the tensioning auxiliary mechanism is arranged between the two positioning fulcrum shafts and the tensioning auxiliary shaft; the movable support is arranged on the right side of the rear end face of the limiting guide plate in a left-right sliding mode and rotationally connected with the positioning fulcrum shaft at the right end. The detection auxiliary mechanism is arranged among the movable bracket, the limiting guide plate and the grinding wheel; the production safety during grinding of the reinforcing steel bars and the grinding precision of the reinforcing steel bars are improved, and the surface integrity of the reinforcing steel bars is guaranteed; the problem that safety accidents are easily caused due to the fact that an operator does not replace the grinding wheel in time but continues to use the grinding wheel due to weak maintenance consciousness is solved.

The invention belongs to the technical field of surface treatment after combined machining of parts, and relates to a method and related equipment for laser strengthening repair of easily-damaged parts of a gas compressor blade, a laser shock strengthening technology is adopted, the strength of the easily-damaged parts of a blade tip of the blade is enhanced, and the residual tensile stress of the blade is changed into residual compressive stress on the premise that the roughness is not changed. The invention provides a method for improving the surface integrity of the blade in order to ensure that the blade subjected to laser pulse shock peening treatment does not influence the flow field distribution of the working environment of the blade and under the condition that the surface roughness of the blade is not changed, the stress resistance is enhanced, the surface integrity of a part is improved, and the blade tip corner falling fault is reduced.

The present application relates to the intermittent distribution technical field, specifically, it is a kind of preparation method of diamond wire of intermittent distribution abrasive.The method steps include: the pretreatment of high carbon steel diamond wire original bus, and screening qualified diamond wire bus.The present application establishes nickel layer thickness design model, introduces high-speed dynamic load correction coefficient to calculate the final nickel plating layer thickness, then according to the dried diamond wire bus, prepares insulating coating area on the surface of nickel layer, constructs flow channel to destroy air curtain and discharge silicon scraps, establishes dynamic displacement response model of spray head, sprays insulating material on the surface of the dried diamond wire bus in non-insulating coating area, forms exposed and insulating alternating structure, through the layout of insulating coating area and intermittent precision spraying, directional flow gap structure is formed, cutting fluid is quickly infiltrated into cutting interface, silicon scraps are smoothly discharged under the centrifugal action, cutting resistance and interface thermal stress are effectively reduced, and photovoltaic silicon wafer cutting surface integrity is improved.

The invention relates to the technical field of industrial robots, in particular to a wafer conveying mechanical arm shell machining method which comprises the following steps that firstly, gradient heat treatment is conducted on an aluminum alloy casting, and the gradient heat treatment comprises three stages of treatment including heat preservation at 200 DEG C + / -10 DEG C for 2 h, heat preservation at 430 DEG C + / -5 DEG C for 1 h and liquid nitrogen subzero treatment for 30 min; secondly, orthogonal vibration aging treatment is carried out in a multi-frequency resonance stress relief device, the main vibration frequency ranges from 80 Hz to 120 Hz, and the acceleration ranges from 0.5 g to 1.2 g; thirdly, multi-process combined machining is carried out in a five-axis linkage machining center, the rotating speed of a main shaft is larger than or equal to 25000rpm, and an HSK-E50 cutter handle system is arranged; through thermal-mechanical-electric multi-field cooperative control, dynamic feedback optimization and precise detection technologies, the problems of stress deformation, surface integrity control and dimensional stability in high-precision shell machining are solved, and the strict requirements of a robot manipulator for light weight, high rigidity and long service life are met.

The application discloses an ultrasonic wave and micro-bubble coordinated electrochemical polishing device and polishing method. The polishing device comprises an electrochemical polishing cabin; a workbench for placing a workpiece and a clamp for fixing the workpiece on the workbench are arranged in the electrochemical polishing cabin; the electrochemical polishing cabin is provided with an electrolyte circulating loop, the outlet of the electrolyte circulating loop is communicated with the inlet through the circulating loop, a micro-bubble generating device and a supply pump are arranged on the electrolyte circulating loop; the polishing device further comprises a pressure booster for pressurizing the electrochemical polishing cabin, a bubble monitoring device for monitoring the micro-bubble concentration in the electrolyte and an ultrasonic wave generating device; the ultrasonic wave probe of the ultrasonic wave generating device and the workpiece are connected with a power supply. The polishing method can simultaneously consider high polishing efficiency, high consistency and excellent surface integrity of the workpiece.

The invention discloses a subsurface contact fatigue damage calculation method considering surface integrity characteristic parameters, relates to the technical field of mechanical part fatigue analysis in engineering, and solves the problem that existing mainstream fatigue analysis software lacks a subsurface contact fatigue analysis module. The method comprises the steps of finite element model input and subsurface layer adaptive grid generation, surface integrity characteristic parameter gradient curve characterization, surface integrity characteristic parameter coupling effect model establishment, and subsurface fatigue damage and danger depth prediction. The core of the method is to generate a sub-surface layer adaptive grid, characterize a gradient curve of surface integrity characteristic parameters changing along the depth, and establish a coupling effect model of each characteristic parameter to sub-surface contact fatigue damage, thereby realizing damage prediction and dangerous area positioning functions.

The invention relates to the technical field of stamping equipment, in particular to stamping equipment and method for solving stamping dezincification of a galvanized sheet, the stamping equipment comprises the stamping equipment fixed on a machine table, and the stamping equipment comprises a guide column, a stamping oil cylinder, a buffer assembly, a stamping forming assembly and an auxiliary demolding assembly; a piston rod of the punching oil cylinder is downwards fixed with a mounting plate which is in sliding fit with the guide columns; the punch forming assembly comprises an upper die base and a lower die base, the upper die base is connected with the mounting plate through buffer columns, an upper die is fixed to the bottom face of the upper die base, and a die cavity of the lower die base is internally provided with a demolding hole; the buffer assembly comprises a buffer plate in sliding fit with the guide columns, and the buffer plate is located between the mounting plate and the lower die base. The auxiliary demolding assembly comprises a push-out rod which moves synchronously with the buffer plate, and the top end of the push-out rod corresponds to the demolding hole. When the stamping equipment stamps a galvanized sheet, a zinc layer is uniformly stressed, so that the dezincification phenomenon is reduced, the surface integrity and corrosion resistance of a workpiece are improved, and meanwhile, the service life of a die is prolonged.

The present invention discloses a high-temperature and high-pressure testing device for rock testing, which specifically relates to the field of rock testing technology, and includes a shell, wherein the inner surface of the shell is fixedly connected to a partition plate 1 and a partition plate 2, respectively, and the upper end of the partition plate 2 is respectively provided with a bag assembly and a push-steering assembly. The high-temperature and high-pressure testing device for rock testing described in the present invention is provided with a bag assembly so that the rubber membrane bag can be tightly attached to the outer surface and the left end face of the cylindrical rock. In the high-temperature and high-pressure test, the surface integrity and structural stability of the cylindrical rock during the test can be maintained. The outer cylindrical surface seal can prevent scratches and wear caused by friction and collision with the test device components, thereby ensuring the mechanical properties of the rock and the accuracy of the test results. Sealing one end face can prevent porous or easily weathered rocks from evaporating and cracking due to environmental changes, thereby maintaining the stability of the rock structure and ensuring the consistency of the rock performance during the test.

The application relates to the technical field of furniture processing, in particular to a furniture frame bending device and method, which comprises a workbench, a bending device and an extrusion plate are arranged on the workbench, an auxiliary wheel is arranged on the top of the workbench, an auxiliary moving mechanism and a displacement compensation mechanism are further arranged on the workbench, the auxiliary moving mechanism is used for full-length limiting constraint of the furniture frame, and the displacement compensation mechanism is used for offsetting material displacement deviation in the bending process. The furniture frame bending device and method, the folding wing plate of the auxiliary moving mechanism is matched with the rotating wheel, the full-length limiting and uniform compression of the furniture frame are realized, the spring one is matched with the frames with different thicknesses and materials in the elastic action, the displacement caused by single constraint is avoided, the rotating wheel reduces the friction between the frame and the device, effectively prevents the horizontal deviation and surface scratches during the bending, and improves the surface integrity and the reference consistency of the frame processing.

The invention relates to a concrete structure damage health assessment method which comprises the following steps: determining structure health factors including surface integrity, internal defect degree, concrete material strength, structure dynamic performance, structure overload effect, climate change influence degree and environmental corrosion influence degree; calculating a health value of each structural health factor; calculating a structural damage health value; and evaluating a structural damage health degree and structural damage defects. According to the method, a plurality of structure health factors are fused, and each structure health factor considers a plurality of influence factors, so that the structure damage health assessment is more comprehensive and reliable, and the whole-cycle damage health assessment of the concrete structure can be realized.

The invention discloses a welding assisting device for an assembly type prefabricated steel structure, and particularly relates to the technical field of welding, the welding assisting device comprises a machine table, clamping plates for clamping a steel beam are fixedly installed at the upper end of the machine table in a rectangular distribution mode, and a welding assisting device attached to the inner wall of the steel beam is arranged in the middle of an inner cavity of a shell; an electric capstan and plasma welding equipment are arranged in the control cabinet, and traction cables distributed in a rectangular shape are arranged on the front side and the rear side of an inner cavity of the shell correspondingly. Precise internal and external clamping of the wing plate is achieved through cooperation of the wing plate positioning structure and the wing plate clamping structure, welding displacement is prevented, the relative position of the wing plate and the main plate is precisely calibrated through cooperation of the positioning driving structure and the cross beam positioning structure, the position precision is guaranteed, and all core structures work cooperatively to improve the welding quality and reduce errors; and meanwhile, the device adapts to H-shaped steel beams of different specifications, the universality of the device is greatly improved, the workpiece surface integrity is effectively protected, and whole-course stable and efficient welding auxiliary operation is achieved.