22results about How to "Improve surface integrity" patented technology

The invention belongs to the technical field of fiber reinforced composite material recovery, and particularly relates to a full-process recovery method of a fiber reinforced composite material. The modified fiber is prepared by constructing a dynamic coordination crosslinking interface layer formed by Co < 2 + > and phenolic hydroxyl groups and amino groups in polydopamine on the surface of the fiber. And then, preparing the fiber reinforced composite material by taking the modified fiber and resin as raw materials. A fiber reinforced composite material is placed in a coordination competitor, cobalt-oxygen and cobalt-nitrogen coordination bonds of an interface layer are competitively dissociated and interface bonding is destroyed under the heating condition by utilizing the stronger coordination capacity of the coordination competitor to Co < 2 + >, and then ultrasonic treatment is assisted, so that efficient and nondestructive separation of fibers and a resin matrix is realized. The process method is simple, convenient to operate, green and environmentally friendly, and has important practical significance and industrial application prospects.

The invention provides a surface-modified perovskite nanocrystal and a preparation method and application thereof, and the surface-modified perovskite nanocrystal comprises: a perovskite nanocrystal having a chemical composition of ABX3; wherein A is selected from at least one of Cs < + >, CH3NH3 < + > and HC (NH2) 2 < + >; b is selected from at least one of Pb < 2 + >, Sn < 2 + >, Ge < 2 + > and Mn < 2 + >; x is selected from halogen anions; the surface of the perovskite nanocrystal is coated with an organic ligand layer; the organic ligand comprises a halogenated organic ligand. In the surface modified perovskite nanocrystal, the surface of the perovskite nanocrystal is coated with the organic ligand layer, so that surface defects can be effectively passivated at the same time, and the surface integrity and the crystallization quality of the nanocrystal are remarkably improved. And due to the surface consistency, the defect state density is reduced, and the exciton and phonon coupling coefficient is reduced, so that a non-radiative composite channel is remarkably inhibited, and the optical performance of the perovskite nanocrystal is remarkably improved.

The invention discloses a cavitation shot peening surface strengthening method and system based on cooperation of high hydrostatic pressure and spherical focused ultrasound. The method comprises the following steps: establishing and maintaining a hydrostatic pressure environment higher than 0.1 MPa in a high-pressure processing cavity filled with a degassing liquid medium; the to-be-machined surface of the workpiece is positioned in a sound field focal region of the spherical focused ultrasound transducer; and in the high hydrostatic pressure environment, a transducer is driven to work so as to generate a cavitation bubble group in a space confinement range in a focal region of the transducer, and meanwhile, the workpiece is controlled to move according to a preset path, so that cavitation collapse impact acts on a target region on the surface of the workpiece. The device comprises a high-pressure processing cavity, a spherical focused ultrasonic transducer, a multi-degree-of-freedom movement mechanism and a control system. Through cooperation of high hydrostatic pressure constraint and the spherical focusing sound field, precise localization and energy strengthening of the cavitation effect are achieved, a plastic deformation layer can be efficiently and controllably introduced to the surface of a metal material, the surface hardness can be remarkably improved, a residual compressive stress layer is formed, surface layer grains are refined, and the method is suitable for precise surface strengthening of complex components.

This invention relates to a teardrop-shaped chip divider for precision broaching of tenon grooves in aero-engines, belonging to the field of aero-engine manufacturing technology. The chip divider features a smooth contour composed of arcs and straight lines within a specific range, and is tangentially connected to the back face of the cutting teeth. This results in a large, smooth, streamlined cross-section without sharp points, effectively solving the industry problem of sharp-cornered chip dividers scratching the machined surface of the workpiece during precision broaching. While ensuring chip breaking and chip separation functions, it significantly improves the surface roughness quality of the tenon groove. It is suitable for precision broaching of high-requirement parts such as compressor discs and fan discs, improving blade machining efficiency.

This invention provides a wafer gripping device and wafer testing equipment based on van der Waals forces, relating to the field of wafer testing technology. Each adsorption assembly includes multiple adsorption elements arranged at intervals, each adsorption element including a connecting post and a van der Waals force patch. The connecting post is connected to a support, and the van der Waals force patch is attached to the bottom surface of the connecting post and contacts the wafer, thereby adsorbing the wafer. The van der Waals force patch is made of a flexible material, and the surface in contact with the wafer has a biomimetic microstructure. The pusher mechanism includes a driving element and a pusher. The driving element is mounted on the support, and the pusher is configured to move downward under the drive of the driving element to push the wafer, thereby causing the wafer to detach from the van der Waals force patch. This embodiment is based on the principle of van der Waals force, and amplifies the van der Waals force through the design of biomimetic microstructures, achieving stable adhesion to the wafer. The pusher can release the wafer, achieving a low-damage and safe and reliable gripping effect, improving wafer yield and surface integrity.

This application discloses a bipolar molecularly co-modified perovskite nanocrystal and its preparation method. After nucleation of CsPbBr3 nanocrystals, zinc bromide and 1-naphthalenesulfonic acid (NSA) are introduced for post-treatment, resulting in dual passivation and physical coating of defect states on the nanocrystal surface. Zinc bromide provides excess Br. ‑ Zn fills surface halogen vacancies. 2+ Occupy Pb 2+ Vacancy suppression of deep-level defects; NSA's sulfonic acid group -SO3 ‑ As strong coordination sites, they replace and firmly anchor weakly bound oleic acid / oleylamine ligands to the surface, and their aromatic ring structure stabilizes the surface through cation-π interactions. Zinc bromide and NSA work synergistically to achieve efficient and deep passivation of surface defect states of CsPbBr3 nanocrystals. Perovskite nanocrystals exhibit high photoluminescence quantum yield, narrow fluorescence peak, and uniform size distribution, and are stably dispersed in organic solvents for a long time. The ligands on the nanocrystal surface are firmly bound, improving optical and structural stability, and the process is simple and efficient.

This invention relates to the field of hydraulic press technology and discloses a hydraulic press device for producing metal trash cans, including a main body with four positioning rods fixedly connected to the top of the main body. When the arc-shaped plate continues to press the top of the can and rotates, it provides guiding friction to the can body. At this time, the metal area at the top of the can body is bent and shaped as the arc-shaped plate rotates. When the can body pushes the arc-shaped plate upwards, the arc-shaped plate pre-presses the metal at the top of the can body. Then, when the arc-shaped plate drives the metal of the can body to rotate and curl the edge, it enhances the curling force while reducing the likelihood of cracks appearing in the metal body during the curling process. By assisting in increasing the curling strength of the metal body, the arc-shaped plate further improves the integrity of the curling angle and increases the curling efficiency.

The application relates to a decorative assembly, an interior trim module and a transportation vehicle. The transportation vehicle comprises an interior trim panel, a guide rail and a backrest lock catch. The backrest lock catch is arranged in a slide rail passage on the interior trim panel and is connected to the guide rail. The decorative assembly comprises a mounting member and a flexible cover member. The mounting member is used for mounting on the interior trim panel and covering the slide rail passage on the interior trim panel. The mounting member is provided with a mounting hole. The mounting hole is adapted to communicate with two opposite sides of the interior trim panel. The flexible cover member is connected to the mounting member in a clamping manner. The flexible cover member covers at least part of the mounting hole. The flexible cover member has a first flexible part and a second flexible part arranged side by side. The first flexible part and the second flexible part define a through gap. In the arrangement of the embodiment, the decorative assembly can shield the slide rail passage, so that the appearance of the interior trim panel is relatively simple.

The utility model relates to the technical field of wooden doors, and discloses a wooden door with an anti-collision buffering function, which comprises a door frame main body, a wooden door main body is arranged in the door frame main body, the outer surface of the wooden door main body is wrapped with a buffering protection pad, and the buffering protection pad is made of rubber materials with high elasticity and wear resistance. According to the wooden door with the anti-collision buffering function, the buffering protection pad and the buffering springs are arranged, when the wooden door is collided, the buffering protection pad can firstly make contact with a colliding object, elastically deform and absorb part of collision energy by means of the high elasticity and abrasion resistance of the buffering protection pad, meanwhile, the buffering springs in the buffering protection pad are compressed, and therefore the buffering protection pad is prevented from being damaged. The residual impact force is converted into elastic potential energy of the spring, impact is further buffered, impact force generated when the door body is impacted is effectively reduced, the wooden door is protected against damage, the service life of the wooden door is prolonged, and economic cost caused by frequent replacement of the door body is reduced.

The application belongs to the technical field of semiconductor material laser processing. A laser-assisted chemical mechanical polishing device and method based on homogenized optical fiber are provided, which comprises a laser generator, an optical path design unit, a scanning galvanometer, a fine polishing unit and a two-dimensional motion platform. The optical path design unit homogenizes and shapes the pulsed laser through the homogenized optical fiber to obtain a square flat-top light spot, and the scanning galvanometer and the two-dimensional motion platform are cooperatively controlled to realize the close arrangement of the light spots. The method determines the galvanometer scanning parameters by matching the platform moving speed, the wafer size and the light spot size, so that the wafer and the polishing disc form relative motion, the laser rough machining and the fine polishing are synchronously performed, and the dropping of the polishing liquid does not affect the laser processing. The application solves the problems of low efficiency, process fragmentation and poor processing consistency of the traditional chemical mechanical polishing, and the single scanning is equivalent to the effect of traditional multiple scanning, which greatly shortens the processing time, improves the processing efficiency and surface uniformity, and is suitable for large-size SiC wafer super-smooth non-damage polishing.

The invention belongs to the technical field of metal surface treatment, and particularly relates to a metal surface corrosion-resistant and wear-resistant coating as well as a preparation method and application thereof, and the coating comprises the following components in percentage by weight: 60-75% of nickel-based alloy powder, 5-15% of nano oxide particles, 10-25% of coated graphite particles and 5-10% of a metal binding phase; the coated graphite particles take graphite particles as cores, and the outer layers of the coated graphite particles are coated with metal oxide nano layers. The surface hardness and the wear resistance are obviously improved; the coated graphite particles of the core-shell structure effectively protect the stability of the graphite in a flame spraying high-temperature environment, avoid the problem of failure of functional components in the prior art, and gradually release the graphite in the service process to form a self-lubricating surface and reduce the friction coefficient. Through a multi-component synergistic effect mechanism, the coating can still keep surface integrity under the severe working condition of coexistence of high load and strong corrosion, and the service life of key parts is remarkably prolonged.

This invention provides an ultra-thin, high-strength battery foil blank and its manufacturing process, belonging to the field of aluminum alloy technology. The process involves first alloying high-purity aluminum with Zr, Er, Sc, Ce, and Ti-B master alloys, followed by degassing, filtration, casting, and milling to obtain an aluminum alloy ingot. This ingot is then hot-rolled, sprayed with an aluminum-based modified graphene dispersion, embedded rolling, cold rolling, intermediate recovery annealing, and two-stage aging to produce an aluminum-based modified graphene / high-strength aluminum alloy foil blank. Finally, it is rolled with 304 stainless steel strip from top to bottom to thin the core layer to an ultra-thin specification before separation and winding to obtain the ultra-thin, high-strength battery foil blank. This invention achieves ultra-thin battery foil while maintaining high strength.

This invention discloses an ultrasonic vibration electrolytic grinding composite spindle component in the field of grinding composite spindle technology, comprising an insulating shell; a hollow spindle rotor; an ultrasonic vibration mechanism connected to the hollow spindle rotor and used to generate and transmit axial ultrasonic vibration; a rotary drive device for driving the hollow spindle rotor and the ultrasonic vibration mechanism to rotate together; and an electrolysis mechanism including a conductive slip ring and an electrolyte delivery assembly, the electrolyte delivery assembly being used to deliver electrolyte to the grinding area at the front end of the hollow spindle rotor; wherein, the first electrical channel of the conductive slip ring is electrically connected to the ultrasonic vibration mechanism for transmitting high-frequency electrical signals; the second electrical channel of the conductive slip ring is electrically connected to the tool mounting end of the hollow spindle rotor for transmitting direct current for electrolytic machining. This composite spindle component, by integrating ultrasonic vibration, electrolytic machining, and high-speed grinding processes, overcomes the fundamental technical bottlenecks of low material removal rate, severe thermal damage, and rapid tool wear in traditional single ultrasonic grinding.

The invention discloses a tool and method for controlling the depth of a contaminated layer on the surface of titanium alloy, and the tool comprises a box body which is provided with an opening in the top and is used for accommodating a titanium alloy part to be treated; the top cover assembly is connected with the opening of the box body, the top cover assembly comprises a ceramic matrix composite one-way cover and a one-way exhaust valve, a plurality of vent holes are formed in the ceramic matrix composite one-way cover, and the one-way exhaust valve is installed at the vent holes; the sealing piece is arranged at the joint of the box body and the sealing cover assembly, and the sealing piece is an annular aerogel gasket; the internal bearing mechanism comprises a plurality of internal bearing assemblies, and the plurality of internal bearing assemblies are arranged in the box body; and the pre-vacuumizing valve is arranged on the box body. According to the method, the depth of the surface pollution layer of the titanium alloy subjected to heat treatment can be stably controlled within 0.05 mm and is obviously superior to the upper limit of 0.08 mm required by the existing industrial standard.

The invention belongs to the technical field of intelligent manufacturing of high-end equipment, and discloses an intelligent machining device for a crane crankshaft journal. Comprising a numerical control machine tool, and a control panel, a positioning mechanism, a cooling mechanism, a power mechanism, a machining mechanism and a numerical control mechanism which are arranged on the numerical control machine tool, and further comprises a machining unit arranged on the numerical control machine tool. Through the constant force floating head and multi-sensor feedback, the system can automatically compensate geometric errors and physical interference, the optimal cutting state is maintained in the fluctuation environment, and the size precision, roundness and surface integrity of the journal are remarkably improved; through a closed loop of a distributed limiting mechanism and a vibration sensor, real-time monitoring and active control over vibration of a workpiece-cutter system are achieved, the chatter problem in the large crankshaft machining process is effectively solved, the machining quality is improved, and the service life of a cutter is prolonged.

This invention discloses a multi-objective Bayesian process parameter optimization method for selective laser melting (SLM) based on geometric feature weighting, belonging to the field of laser selective melting additive manufacturing technology. The method involves inputting an STL model of the part, extracting its geometric features, and assigning corresponding sensitivity weights based on these features to construct a spatial weight field. A weighted multi-objective function coupled with the spatial weight field is established with the optimization objectives of maximizing density, minimizing dimensional error, and minimizing surface roughness as the goals. Experiments are conducted on the process parameters based on Bayesian optimization to search for the Pareto front solution set under the weighted multi-objective function. The Pareto front solution set is then sorted using multi-objective decision-making to select the optimal parameter combination and generate a processing card for forming and manufacturing in a laser selective melting device. By explicitly writing geometric sensitivity into the weighted multi-objective function, a Pareto front that considers ρ, δ, and Ra can be obtained with a small number of experiments. Furthermore, the method can automatically weight parameters according to geometric features, simultaneously optimizing ρ, δ, and Ra while also considering geometric feature sensitivity.

The present application relates to the technical field of metal cutting tools, and provides a micro-textured tool and a processing method thereof, which comprises a tool base body, a fan fin structure micro-texture, a raceway roller structure and a stepped structure are arranged on the tool base body rear face, a plurality of fan fin structure micro-textures are arranged close to the main cutting edge and the edge array of the tool base body, a plurality of stepped structures are equidistantly arranged on one side of the fan fin structure micro-texture, and two groups of raceway roller structures are communicated with the stepped structures and are arranged on the two sides of the stepped structures respectively. The fan fin structure micro-texture, the raceway roller structure and the stepped structure are matched with each other, which can not only promote the occurrence of derivative cutting and the quality of the processed surface, but also reduce the tool wear and prolong the service life of the tool.

The present application relates to a kind of thin-walled high rib ring cylinder multi-degree-of-freedom radial envelope forming equipment, including head, drive component, movement component, column, workbench, main shaft component, workpiece shaft component and base;Drive component includes servo motor, planetary reducer, reversing gear box, servo cylinder, push rod, pressure sensor, left slider, middle slider, right slider, wear-resistant inclined plate, wear-resistant bottom plate, wear-resistant inclined block, wear-resistant bottom block and grating ruler;Movement component includes outer ball seat, inner ball seat, ball cover, inner ball head connecting rod and outer ball head connecting rod;Main shaft component is suspendedly installed on workbench, and main shaft component includes main shaft motor, main shaft box, core roller, copper sleeve, main shaft support cover, main shaft support seat, main shaft, main shaft key and main shaft encoder;Workpiece shaft component is installed on base, including workpiece shaft mounting plate, workpiece, workpiece shaft, workpiece box, workpiece motor and workpiece magnetic grid.The present application can realize thin-walled high rib ring cylinder high-performance high-efficiency forming manufacturing.

This invention relates to the field of conductive, wear-resistant, and superhydrophobic materials, particularly a method for preparing conductive and highly wear-resistant carbon nanotube films. The invention involves first coating a pretreated carbon nanotube film with an epoxy resin layer for pre-curing, then spraying an HD / KH570 / SiO2 solution onto the surface of the pre-cured epoxy resin layer. After curing the coating, a conductive and highly wear-resistant carbon nanotube film is formed. The carbon nanotube film prepared by this method retains the conductivity of the original film while simultaneously increasing its hydrophobic and wear-resistant properties.

The application belongs to the technical field of magnesium alloy surface treatment, and particularly relates to a high-corrosion-resistance and wear-resistance micro-arc oxidation film and a preparation method thereof, which comprises the following steps: first, hexagonal boron nitride nanosheets are modified by dopamine hydrochloride to obtain modified hexagonal boron nitride nanosheets; sodium silicate, sodium hexametaphosphate, potassium hydroxide, potassium fluoride, sodium citrate, aminopropyl cage-type silsesquioxane and the modified hexagonal boron nitride nanosheets are jointly prepared into a composite micro-arc oxidation electrolyte; then, an AZ31 magnesium alloy substrate is polished, cleaned, alkali-washed and activated, and micro-arc oxidation treatment is performed in the composite micro-arc oxidation electrolyte, and finally, silane sealing treatment is performed to obtain the high-corrosion-resistance and wear-resistance micro-arc oxidation film, so that the micro-arc oxidation film obtained has good corrosion resistance and wear resistance.

This invention provides an acidic chemical mechanical polishing slurry for gallium arsenide substrates and its application, belonging to the field of chemical mechanical polishing technology. The polishing slurry comprises, by weight percentage, 0.5–5 wt% modified cerium oxide abrasive, 0.1–3 wt% peracetic acid, 0.05–2 wt% urea peroxide, and the balance deionized water, with a pH value of 3.0–5.0; wherein the modified cerium oxide abrasive is nano-cerium oxide particles with surface-grafted organic acid functional groups, with an average particle size of 20–80 nm. The acidic chemical mechanical polishing slurry for fine polishing of gallium arsenide substrates provided by this invention, by employing a dual oxidant system composed of peracetic acid and urea peroxide, combined with modified cerium oxide abrasive with surface-grafted organic acid functional groups, balances surface reaction stability, abrasive dispersibility, and low-load mechanical removal requirements under acidic conditions, thereby helping to reduce surface scratches, particle residue, and subsurface damage depth, and improving the surface integrity of gallium arsenide substrates after fine polishing.