1099 results about "Smooth surface" patented technology

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

This invention discloses a rapid modeling method for large-size composite structures with variable thickness solid meshes based on a yarn model, belonging to the field of finite element modeling of fiber-reinforced composite materials. Its core process includes: for a large-size component S to be analyzed, generating yarn models for each ply partition using composite material design software and batch-dividing triangular meshes; similarly, extracting smooth surface profiles from the three-dimensional geometry of the overall component S and generating a structured shell mesh as the base carrier; then, using a voxel hash-accelerated spatial Boolean intersection algorithm to automatically identify the element sets of each ply partition between each yarn mesh and the overall shell mesh, generating a stepped solid mesh through normal offset, ensuring interface compatibility through node merging, and finally assigning material properties and generating an analysis model that can be directly submitted for solution. This invention significantly reduces manual workload and error risk, providing an efficient and reliable preprocessing solution for the curing deformation and strength analysis of composite material structures.

The present description belongs to the technical field of battery materials. Disclosed are a single-crystal ternary positive electrode material, a preparation method therefor, a positive electrode sheet and a battery. The apparent factor of the single-crystal ternary positive electrode material is [Formula 1], wherein 1.1≤Z≤3, x=D90 / D10, 2≤x≤5; S(D90) is the number averaged circularity, the total number of target particles is n, and the number averaged circularity is defined as the sum of circularity values of all of the target particles divided by n. The area and circumference corresponding to a two-dimensional projection image of a single target particle are respectively S1 and l1, the circumference of a circle having the area S1 is l2}, and the circularity = l2 / l1. The D10' is the corresponding particle size of a material obtained by compacting the single-crystal ternary positive electrode material at 200 MPa, D10 does not exceed 2.4 μm, and D10' does not exceed 2.3 μm. The single-crystal ternary positive electrode material has smooth surfaces and rounded edges, which are beneficial for fabricating batteries having excellent electrochemical properties.

The invention discloses a multi-view three-dimensional reconstruction method for a slender object based on curve guidance. According to the method, geometric prior and a deep learning segmentation network are fused, two-stage foreground extraction, a curve-guided motion recovery structure (SfM) and a surface optimization module capable of differential Poisson reconstruction are provided, and a set of complete processing flow is established for the problem that a slender and weak-texture object is difficult to accurately reconstruct. The method comprises the following steps: acquiring a multi-view image through a consumer-level terminal and performing frame extraction to obtain an input data set; generating a high-quality foreground mask by utilizing depth estimation and semantic segmentation; performing curve-guided SfM initialization based on the foreground skeleton curve to realize joint estimation of the camera pose and the sparse three-dimensional curve; carrying out surface geometric optimization through a micro Poisson equation and differentiable grid rendering; and designing a multi-branch loss function fusing luminosity, mask, regularization and Gaussian rendering supervision to train the model. Finally, the method can output a three-dimensional reconstruction result of the slender structure with high geometric accuracy, strong structural integrity and smooth surface, and has good robustness and application value.

The invention relates to a method for regulating and controlling the performance of PeLEDs by waiting time before spin-coating, which comprises the following steps: step 1, dropwise adding a perovskite precursor solution to a zinc-magnesium-oxygen electron transport layer which is prepared in advance and has acetate on the surface, standing and waiting for 8-15 seconds on the electron transport layer, the perovskite precursor solution and the electron transport layer are subjected to a pre-reaction; 2, carrying out spin-coating film formation on the perovskite precursor solution subjected to the pre-reaction treatment, and then carrying out annealing treatment on the perovskite film; the perovskite thin film is an FAPbBr3 thin film; the perovskite precursor comprises FABr and PbBr2, and the molar ratio of the FABr to the PbBr2 is greater than 2: 1. According to the method, the perovskite thin film with a smooth surface is prepared by using specific waiting time before spin coating, so that local electric injection nonuniformity is inhibited, the efficiency roll-off of the device is reduced, and the brightness of about 590000 cd m <-2 > is finally realized.

The invention belongs to the related field of ultra-precision polishing technology, and discloses an ultrasound-piezoelectricity-photocatalysis assisted chemical mechanical polishing method which comprises the following steps: mixing a basic polishing abrasive, a piezoelectric material and a photocatalyst, calcining and grinding, and processing to obtain a modified abrasive; preparing a polishing solution containing a piezoelectric catalysis carrier and a photocatalysis carrier at the same time; the polishing process is completed through a chain of mechanical stress, a piezoelectric electric field, efficient carrier separation and more active species participating in reaction. The invention further discloses a matched polishing device. Compared with the prior art, the method has the advantages that the material removal rate can be effectively increased, the polishing time can be effectively shortened, the surface quality can be further improved, the subsurface damage can be reduced, in addition, a more environment-friendly polishing solution can be used, the waste liquid treatment cost is reduced, the environment is protected, and the method is suitable for industrial production. Therefore, the polishing device is especially suitable for various high-hardness materials to realize the polishing application occasions of low-damage and ultra-smooth surfaces of the high-hardness materials.

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 invention discloses a punching-free installation attendance machine, and belongs to the technical field of attendance machines, the punching-free installation attendance machine comprises a preassembled plate fixedly installed on the outer side of a smooth preset surface, a machine body is installed on the preassembled plate through a lifting assembly, and a detection module for monitoring the body type and position of a user is installed on the machine body; an adsorption assembly used for being adsorbed to the smooth surface is arranged at the center position of the pre-assembling plate, flexible adhesive patches bonded to the smooth surface are further evenly embedded and fixedly installed on the back face of the pre-assembling plate, an air blowing pipe is further installed on the adsorption assembly, a fixing base is fixedly installed on the back face of the machine body, and an air conveying assembly is arranged on the inner side of the fixing base. According to the attendance machine without punching installation, multi-mode matched positioning is adopted, the adsorption structure can be automatically adjusted in the follow-up using process, the adsorption stability is ensured, automatic cleaning of a working area can be achieved in the position height adjusting process, and the punching recognition precision is ensured.

The invention discloses a PBO fiber reinforced bulletproof helmet and a preparation method thereof. The PBO fiber reinforced bulletproof helmet is provided with a shell, the shell comprises a resin matrix and reinforcing material layers, the reinforcing material layers are distributed in the resin matrix, and the adjacent reinforcing material layers are fixedly combined through the resin matrix; the reinforcing material layer comprises PBO fibers. According to the bulletproof helmet, the PBO fiber is adopted as a reinforcement body to prepare the bulletproof helmet for the first time, and the problems that an existing aramid fiber helmet is poor in bulletproof performance and an ultra-high molecular weight polyethylene helmet is poor in stability are solved; according to the preparation method provided by the invention, the hot pressing process is optimized, so that the problem of deviation caused by smooth surface of the PBO fiber and poor bonding property with the resin is avoided, and the PBO fiber reinforced bulletproof helmet with stable shape and excellent performance is prepared.

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

The invention relates to the technical field of concrete fracture tests, in particular to a preparation method of a transparent resin-based imitation concrete material. Comprising the following steps: S1, weighing raw materials: weighing epoxy resin and a curing agent according to a mass ratio of 20: 1; s2, material mixing: pouring the epoxy resin and the curing agent into a stirring cup, placing the stirring cup in a planetary gravity stirrer, and performing high-speed mixing under a vacuum condition; s3, water bath cooling: putting the mixed liquid subjected to vacuum defoaming into cold water for water bath cooling; s4, pouring and forming: slowly pouring the cooled mixed solution into a mold, and standing and primarily curing at room temperature to form an initial setting body; s5, constant-temperature curing: transferring the mold containing the initial setting body into a constant-temperature drying oven, and continuously curing; and S6, demolding the test piece: after curing is completed, removing the mold to obtain the transparent imitation concrete resin test piece with a smooth surface and no bubbles inside. By adopting the transparent resin-based imitation concrete material, the damage characteristic can be directly observed, and an experimental basis is provided for high-pressure water jet stress wave cracking concrete.

The invention relates to a silicon nitride crystal based on high static nitrogen pressure and active nitrogen regulation and a growth method thereof. The silicon nitride crystal is prepared by the growth method, and the method adopts a physical gas phase transmission process and specifically comprises the following steps: introducing high static pressure nitrogen (1-3 bar) and trace NH3 / N2 mixed gas into source powder formed by mixing high-purity beta-Si3N4 and polycrystalline silicon, and dynamically maintaining the gas phase N / Si molar ratio to be (1.33 + / -0.1): 1, thereby inhibiting the decomposition of the source powder and stabilizing the crystal growth; carrying out spray granulation on the source powder, carrying out compression molding, placing the obtained product in a graphite crucible with the inner wall coated with TaC, and carrying out ordered epitaxial growth by controlling the temperature difference of a temperature zone at 1800-2000 DEG C and the axial temperature gradient; according to the method, the dislocation density and the carbon impurity content of the silicon nitride crystal can be remarkably reduced, then the high-purity silicon nitride crystal with a complete structure and a smooth surface is obtained, and the method is suitable for the fields of high-temperature electronic devices and deep ultraviolet light electronics.

The invention provides a super-smooth antifouling surface with photo-thermal self-repairing performance as well as a preparation method and application of the super-smooth antifouling surface. The super-lubricity antifouling surface comprises a light response substrate and a lubricating layer formed on the light response substrate. Wherein the photoresponse substrate can trigger the photothermal conversion performance under the irradiation of near-infrared light, so that the temperature of the super-lubricity antifouling surface is rapidly increased, polyethylene wax and C12-C16 long-chain alkane in the lubricating layer can be in a molten state, the position, with defects, of the surface of coastal or marine common mechanical equipment is filled up, and after cooling, the surface of the mechanical equipment is not damaged. And a self-repairing function is realized. Compared with the prior art, by compounding the polyethylene wax and the C12-C16 long-chain alkane, a novel solid-state phase-change super-smooth surface can be provided, the stability and the antifouling property of the super-smooth antifouling surface are remarkably improved, and the problem that the antifouling property fails due to the fact that a traditional liquid-state super-smooth surface lubricating layer is poor in shear resistance is remarkably solved.

The invention provides a method for manufacturing a high-strength aluminum oxide ceramic substrate, which comprises the following steps of: performing aluminum oxide particle surface heat treatment rounding on low-cost calcined and crushed aluminum oxide, adding at least one of a magnesium-containing compound, an yttrium-containing compound and a barium-containing compound into the rounded aluminum oxide powder, and adding into a solvent; the preparation method comprises the following steps: fully mixing the raw materials with slurry prepared from a dispersing agent, an adhesive and a plasticizer by virtue of a high-effect bead mill, dispersing, degassing, forming a green body, punching, carrying out two-stage sintering treatment and the like, thereby obtaining the high-density and high-strength composite material which is excellent in density and high in strength. The aluminum oxide substrate with thermal, electrical and mechanical properties, such as surface smoothness roughness of less than 0.05 mu m, high thermal conductivity (K) of more than 30W / mK, insulation characteristic of more than 1014 omega.cm, three-point breaking strength of more than 600MPa, and the like, is prepared from the aluminum oxide substrate.

The invention provides an LTCC raw material belt with a high thermal expansion coefficient, an LTCC substrate and a preparation method of the LTCC substrate, the LTCC raw material belt with a smooth surface and a uniform thickness is obtained through tape casting by adjusting the proportion of silicon dioxide ceramic powder, MgTiO3 ceramic, SrTiO3 ceramic, Li2MgSiO4 ceramic, BCBS, ZABS and LASP microcrystalline glass powder, the LTCC raw material belt is sintered in a nitrogen furnace at 880-940 DEG C for 1-3 h, and the LTCC raw material belt can be co-fired with low-cost copper electrode slurry to be flat and tightly attached to the low-cost copper electrode slurry. The LTCC substrate with the thermal expansion coefficient larger than 11 ppm / DEG C is prepared, under the test frequency of 5 GHz, the dielectric constant of the LTCC substrate ranges from 5.1 to 6.1, the dielectric loss ranges from 0.0025 to 0.004, the bending strength ranges from 170 MPa to 230 MPa, the thermal expansion coefficient at the temperature ranging from 30 DEG C to 400 DEG C ranges from 11.0 ppm / DEG C to 13.0 ppm / DEG C, and acid resistance is good.

The invention relates to the technical field of silicone rubber sealing materials, and discloses a fast-curing matte silicone sealant and a preparation method thereof.The silicone sealant is prepared from, by mass, 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 5-15 parts of a reactive plasticizer, 70-120 parts of calcium carbonate, 5-10 parts of a cross-linking agent, 1-5 parts of a coupling agent, 0.5 part of a catalyst and 0.5-1 part of a vulcanization accelerator; 0.2 to 1.5 parts of a reaction type matte agent solution; the reaction type matte agent solution is a mixture of hydroxylated eleostearic acid triglyceride and a cross-linking agent. The silicone sealant prepared by the invention has the advantages of smooth surface, excellent matte effect, weather aging resistance, thixotropy, rapid curing and the like, can be used as a sealing material for high-end buildings, and has a wide application prospect.

This invention relates to the field of laser cladding additive manufacturing technology, and provides a laser cladding smoothing control system, including a laser, a laser cladding processing head, a robot, a worktable, a positioner, a powder feeder, a protective gas device, a vision acquisition unit, a laser cladding system controller, and a computer system. The computer system performs image processing and feature extraction on real-time molten pool images, inputs the data to the MPC controller, and outputs process parameter adjustment values. The laser cladding system controller sends corresponding process parameter adjustment commands to the laser, robot, and powder feeder according to the process parameter adjustment values, adjusting the laser power, laser scanning speed, and powder feeding rate in real time. This invention allows for online monitoring of various molten pool characteristics and real-time feedback based on a predictive control model. By adjusting various process parameters in real time, it compensates for geometric errors during processing, resulting in a uniformly smooth surface on the formed parts, improving the surface quality and dimensional accuracy of the laser-clad workpiece.

The invention provides an alumina refractory material for a gas turbine lining, which comprises the following main raw materials in parts by mass: 14.9-15 parts of sintered mullite, 76.8-77.3 parts of tabular corundum and 3.6 parts of alpha-alumina powder; and the auxiliary materials comprise the following raw materials in percentage by weight relative to the main raw materials: 0.2% of sodium tripolyphosphate, less than or equal to 0.7% of mullite fiber, 3% of silica fume and 1% of magnesium oxide. According to the invention, the smooth-surface alumina refractory material product for the gas turbine lining is obtained through casting molding, room-temperature curing, drying and sintering. Through detection, the compressive strength of the refractory material reaches 237.21 MPa, the bending strength reaches 40.12 MPa, and the refractory material has a good application prospect when being used as a lining material of an internal combustion engine.

A multi-layer engineered-wood composite panel or board with a core strand layer, with one or both top and bottom surface layers formed with “fluffy” fiber layers. The fibers may be synthetic or natural. The fibers have anti-settling characteristics. The fibers may be micro-fibrillated cellulose and subsequent cellulose elemental fibrils processed to reduce lignocellulosic recalcitrance and allow the structural integrity of cell walls to be loosened and fibers to be unfolded and exposed. The processed fibers when used as a surface layer provide a denser, smoother and more uniform surface than that obtained with particle-based products.

The utility model discloses a meshing type load chain structure and a chain group thereof. The chain structure comprises a first chain A and a second chain B which are oppositely arranged, the first chain A and the second chain B are each formed by connecting a plurality of chain links with two or more inner chain pieces and outer chain pieces in series, wherein the outer chain pieces are connected with the chain links in an end-to-end alternating mode through pin shafts. The inner chain pieces and the outer chain pieces are the same in shape and structure and are in axial symmetry. Each inner chain sheet of the first chain A and the inner chain sheet of the second chain B are oppositely and correspondingly arranged and are meshed with each other; each outer chain sheet of the first chain sheet A and the outer chain sheet of the second chain B are oppositely and correspondingly arranged and are meshed with each other; and the opposite surfaces of the inner chain sheets and the outer chain sheets are parallel and continuous smooth curved surfaces. By the adoption of the chain structure and the chain set, the load generated when the chain structure is used for conducting linear reciprocating transmission in a limited space can be effectively increased, and the mechanical noise problem generated when the chain structure and the chain set are in the working state is remarkably reduced.

The utility model discloses a blade type spiral flow spiral flow generator based on a bionic non-smooth surface. The blade type spiral flow spiral flow generator is divided into a mandrel part and a front cone part. The main body of the core shaft part is a core shaft, the core shaft is a solid cylinder, a plurality of spiral blades are arranged on the excircle surface of the core shaft in parallel, a plurality of grooves are distributed in each spiral blade side by side in the radial direction, and all the grooves face the front cone direction; the main body of the front cone part is called a front cone section, and a plurality of ribs are longitudinally arranged on the conical surface of the front cone section. The utility model belongs to the technical field of fluid machinery, and solves the problems of low fluid conveying efficiency and lower material mixing property caused by unsatisfactory structure arrangement of a spiral flow spiral flow generator in the prior art, and the grooves not only increase the contact surface between the blades and the materials, promote the full mixing of the materials, but also enhance the stirring uniformity and efficiency; in addition, the shape and arrangement of the grooves ingeniously guide the materials to flow in the spiral line direction, the conveying resistance is reduced, and the overall conveying performance is improved.

The invention discloses pretreatment processing equipment for roadbed concrete regeneration, and belongs to the technical field of crushing devices.The pretreatment processing equipment comprises a secondary support assembly, a bottom bearing assembly is located at the bottom of a treatment bottom groove, a dust removal assembly is located in the center of the bottom of the treatment bottom groove, and the top of the treatment bottom groove is connected with a power output assembly through the secondary support assembly; a surrounding assembly is arranged on the inner wall of the treatment bottom groove, and a particle shifting base is fixed to the side face of the surrounding assembly. Through the arrangement of the surrounding extrusion roller, the planetary surrounding assembly is matched with the deviation shaft rod to enable the surrounding extrusion roller to rotate around the inner wall of the treatment bottom groove and complete the jaw closing action at the same time, materials sent out in the material feeding groove are crushed, and aggregate is rapidly separated through the cooperation of the aggregate stripping table in the process that the surrounding extrusion roller rotates around the treatment bottom groove; therefore, the smooth surface of the separated aggregate is ensured, and the generation of aggregate cracks can be reduced through the friction between the materials.

The present application relates to the technical field of cable manufacturing, in particular to an extrusion molding equipment for cable insulation sheath, which comprises an extrusion device including an extrusion head and a rotating assembly. By uniformly arranging multiple convex surfaces on the outer wall of the extrusion head in the circumferential direction, the radial distribution of the molten material in the flow channel is adjusted, and the molten material is guided to supplement the inter-strand gap of the multi-strand twisted cable. At the same time, the extrusion head is driven to rotate by the rotating assembly, so that the convex surface can adapt to the cable outer surface profile in real time. Therefore, the uniform thickness and smooth surface of the insulation layer are ensured, and the phenomenon of excessive collection or uneven distribution of materials to the gap is avoided, which not only eliminates the electrical hazards in the excessively thin area, but also reduces the material waste in the excessively thick area, thereby improving the insulation performance of the cable and the material utilization rate.

The invention discloses a solid oxide fuel cell electrolyte thin film and a preparation method thereof, the electrolyte thin film sequentially comprising a transition layer, a self-repairing layer and a compact layer is formed on the surface of one side of a substrate, the transition layer is made into a film through a solid-liquid phase forming process, and first sintering is carried out to obtain the solid oxide fuel cell electrolyte thin film, the self-repairing layer and the compact layer are obtained through the vacuum sputtering coating process at the room temperature, and the compact and thin electrolyte film is obtained at the low preparation temperature, so that the energy consumption cost can be reduced, and commercialized application is facilitated. According to the preparation method, relatively good film-substrate binding force and film compactness can be realized, pores and cracks are not easy to generate under extreme conditions, and the prepared electrolyte film is relatively flat in surface and can realize relatively good interface contact.

The utility model relates to the technical field of crawler belts, in particular to a crawler belt suitable for smooth surface operation, which comprises an annular bottom belt, and the surface of the inner wall of the annular bottom belt is provided with a clamping assembly used for being assembled with a walking wheel in a matched mode. A plurality of buffer pieces are fixed on the surface of the outer wall of the annular bottom belt; and anti-skid pieces are fixed to the outer side surfaces of the multiple buffer pieces correspondingly. According to the arrangement, the multiple buffering pieces are fixed to the surface of the outer wall of the annular bottom belt, impact on the surface of an object can be reduced in the running process, crawling noise and vibration are reduced, the anti-skid pieces are fixed to the surfaces of the outer sides of the buffering pieces, the friction force between the anti-skid pieces and the ground can be increased, and walking on the smooth surface of the object is achieved; therefore, the device is suitable for a complex terrain environment.

The invention provides a method for enabling an optical fiber module interface radiator to be closely attached to an indium heat-conducting sheet. The method comprises the steps that the surface of a nickel-plated layer of the interface radiator is polished to form a rough surface; preliminarily forming an indium heat-conducting sheet on the rough surface; then the workpiece is placed on a jig platform, and a mirror surface roller is arranged on the jig platform; providing a PET (Polyethylene Terephthalate) sheet which is positioned between the surface of the indium heat-conducting sheet and the mirror roller; the method comprises the following steps: pressing an indium heat-conducting sheet into a roller under the roller pressure of 40-110kgf, riveting the bottom of the indium heat-conducting sheet into a rough surface which is tightly combined with the interface radiator, so that a gap and air do not exist on the combined surface, and the top surface of the indium heat-conducting sheet is a flat smooth surface, is attached to the surface of the interface radiator and is tightly combined and molded into an indium heat-conducting thin layer; the surface of the indium heat conduction thin layer is coated with an anti-oxidation coating with the thickness of 1-5 microns; therefore, the indium heat-conducting material can be tightly adhered to the surface of the interface radiator without an adhesive, the interface radiator has excellent drawing resistance and friction resistance, and the influence of thermal resistance caused by air and the adhesive is reduced.

The utility model discloses a plastic mold capable of preventing impurities from falling into, which belongs to the technical field of plastic molds and comprises a base, a worktable fixedly mounted at the top of the base, a lower mold and four groups of fixing rods fixedly mounted at the top of the worktable, fixing plates fixedly mounted at the tops of two groups of fixing rods positioned on the same side, and an upper mold fixedly mounted at the top of the lower mold. Cylinders are fixedly mounted at the tops of the two groups of fixing plates, so that an operator is prevented from manually taking out a product from a mold, the possibility of being scalded, scratched and the like by the mold is avoided, the operator can operate outside a safer distance, the occurrence probability of industrial accidents is reduced, the influence of impurities on the appearance and quality of the product can be effectively avoided, and the production efficiency is improved. The plastic product with smooth surface and uniform texture is produced, so that the stability and reliability of the performance of the plastic product are ensured, and the buffer spring can control the downward pressing speed of the upper mold to a certain extent, so that the upper mold can be assembled with the lower mold more stably.

The invention relates to the technical field of mechanical seals, in particular to a mechanical seal repairing method. According to the repairing method of the mechanical seal, the hard coatings are formed on the abraded end faces of the moving ring and the static ring through the nanometer hard coating paste, the diamond grinding agent and the wool grinding head are used for conducting coarse grinding, fine grinding and mirror grinding on the solidified hard coatings, so that the hard coatings and the original surface form a uniform and flat surface, and the surface smoothness is smaller than or equal to 0.3 micrometer. After being installed, the repaired moving ring and the repaired static ring can resist the pressure of 0.2 MPa through pressure testing, so that the service life of the mechanical seal is greatly prolonged, the production cost of an enterprise is reduced, and the running loss is reduced.

The present application relates to the field of plate processing device, specifically to a flexible finishing mechanism, by setting the first and second side of the mold body as a smooth surface, used to guide the smooth entry of the plate, avoiding the sharp collision of the traditional disc mold, solving the problem of easy to produce wave under high speed. By setting the first and second torsional spring, used to provide continuous elastic buffer force, compared with linear spring, torsional spring is not easy to fatigue relaxation under long-term alternating load and easy to adjust the preload, solving the problem of unstable processing effect caused by the performance decline of traditional spring. By setting the first bearing, used to change the sliding friction between the first mold body and the plate into rolling friction, by setting the second bearing, used to change the sliding friction between the second mold body and the plate into rolling friction. At least solve one or more of the deficiencies of the existing finishing mechanism in high speed adaptability, adjustment convenience and long-term stability.

The invention relates to the technical field of surface treatment, and discloses a PVD (Physical Vapor Deposition) treatment method for sawteeth. Comprising the following steps: carrying out alkaline electrolytic polishing treatment to obtain a flat surface, carrying out phosphating treatment after pickling neutralization to form a chemical conversion film, depositing a hard functional layer through PVD plating, carrying out surface cleaning and pretreatment to obtain a clean substrate, coating a heat-resistant base coat with a polymer to form a heat-resistant hard bottom layer, coating a wear-resistant surface coat with a polymer to form a wear-resistant protective layer, and curing to form a film to form an integrated structure. Through the synergistic effect of the five-layer composite protection structure, the sawtooth groove protection blind area is eliminated, the coating quality consistency is remarkably improved, the corrosion resistance time exceeds 2000 hours, the high-temperature softening limit is broken through, 100-180 DEG C stable work is achieved, the wear resistance is improved by one order of magnitude, meanwhile, functionality and durability are considered, and the service life is prolonged. And an effective technical solution is provided for long-term reliable application of the sawtooth workpiece under harsh working conditions.