498 results about "Micro holes" patented technology

The invention discloses a mold partition temperature control system based on an air film adjustable thermal resistance boundary, and belongs to the technical field of mold temperature control and thermal management. The system comprises a mold body, at least two temperature control subareas and gas film adjustable thermal resistance boundary units arranged between the adjacent temperature control subareas. The air film adjustable thermal resistance boundary unit comprises a boundary air cavity, an air injection micropore, an exhaust adjusting structure and an air supply unit. Gas enters the partition boundary area through the gas injection micropores and forms a gas film layer, and the thickness, continuity, stability and coverage range of the gas film layer are changed by adjusting the gas supply pressure, the gas supply flow and the exhaust resistance, so that the thermal coupling strength between the adjacent temperature control partitions is adjusted. The system is suitable for injection molding, pressure casting, hot pressing and composite material forming molds.

The invention discloses a piezoelectric cantilever beam energy collector, and the collector comprises a fixed part 1 which is used for fixing the collector at a certain position; the supporting beam and the fixing piece 1 are connected into a whole, the supporting beam comprises a bionic bamboo joint structure 2 close to one end of the fixing piece 1 and a mass structure 3 far away from one end of the fixing piece 1, and at least one micropore 6 penetrating through the upper surface and the lower surface of the supporting beam is formed in the bionic bamboo joint structure 2 and used for forming alternate rigid segments and flexible nodes on the bionic bamboo joint structure 2; the supporting beam swings with the end close to the fixing piece 1 as the circle center in the vibration environment. The mass block 5 is arranged on the mass structure 3; the number of the piezoelectric films 4 is two, the two piezoelectric films 4 are arranged on the upper surface and the lower surface of the bionic bamboo joint structure 2 respectively, and the piezoelectric films 4 cover the micropores 6 formed in the bionic bamboo joint structure 2.

According to the large-depth-diameter-ratio micropore laser rotary-cutting precision machining system and method, light beam self-rotation and light beam scanning are achieved through a compact rotating assembly integrating a Dove prism and double reflectors, the off-axis angle and the off-axis amount are precisely regulated and controlled through deflection and movement of the reflectors, light beams are subjected to off-axis focusing through a focusing assembly, and the precision of laser rotary-cutting precision machining is achieved. Finally, a light path focusing mode of first converging and then off-axis focusing is formed, large-depth-diameter-ratio micropore machining is achieved, the aperture range is dozens of micrometers to several millimeters, and the maximum depth-diameter ratio can reach 15: 1 or above; the device is compact in structure, a complex adjusting system is not needed, the control mode is simple, high rotating speed can be achieved, ultra-short pulse time domain broadening is reduced through the double-reflector system, and machining of hole patterns such as steep straight holes and taper holes can be achieved.

The invention provides a multi-energy-field auxiliary laser drilling method and device for a silicon carbide micropore with the large depth-diameter ratio, and relates to the technical field of hard and brittle material precision machining.The multi-energy-field auxiliary laser drilling method for the silicon carbide micropore with the large depth-diameter ratio comprises the following steps that a silicon carbide workpiece is ablated layer by layer through an ultrafast laser beam to form the micropore; and in the layer-by-layer ablation process, the workpiece or the ultrafast laser beam generates relative high-frequency micro-amplitude ultrasonic vibration in the axial direction of the micropore, and the low-temperature high-speed air flow is coaxially guided to an ablation point of the ultrafast laser beam so as to remove ablation products and cool the ablation point and the adjacent area of the ablation point. Through organic combination and synergistic effect of ultrafast laser ablation, ultrasonic vibration in the axial direction of a drill hole and coaxial low-temperature high-speed airflow, the problems that in the prior art, due to unsmooth chip removal of ablation products and the remarkable heat effect, the machining depth is limited, the hole wall quality is poor, and the machining efficiency is low are solved.

The utility model belongs to the technical field of food preservation, and particularly relates to an alcohol bag for food preservation. The alcohol fresh-keeping material comprises a front-side wrapping material, a back-side wrapping material and an alcohol fresh-keeping material body, a middle reserved cavity is formed by the front-side wrapping material and the back-side wrapping material in a peripheral hot-pressing mode, and the middle reserved cavity is filled with an alcohol fresh-keeping material body. The surface of the front surface wrapping material is provided with breathable micropores. Ventilation micropores are formed in the back surface wrapping material. The ventilation micropores are conical holes, and the taper can be adjusted so as to assist in controlling the volatilization speed of the alcohol. Each of the front-side wrapping material and the back-side wrapping material is composed of a high-temperature-resistant printing layer, a composite connecting layer and a heat sealing layer. The alcohol fresh-keeping material body is a pure liquid or a colloidal mixture or particles. The packaging film formed by extruding macromolecules ensures that the packaging film is air-permeable and liquid-impermeable, the volatilization speed is adjustable, the situation that the taste of food is affected by overhigh local alcohol concentration is not easily caused, and meanwhile, the food can be kept fresh for a long time.

The invention belongs to the technical field of ceramic matrix composite material laser processing, and discloses a ceramic matrix composite material component large depth-diameter ratio micropore long pulse laser processing method, which comprises the following steps: cleaning the surface of a pretreatment component, and finishing initial alignment of processing; then drilling in three stages: in the first stage, using a first group of parameters to make a laser focus defocus, and releasing a preset pulse; in the second stage, the pulse width and frequency are kept unchanged, the laser power is maintained, the focus is adjusted to be zero defocus, and the pulse is released; and in the third stage, the first two parameters are kept unchanged, the laser power is reduced, the focus is adjusted to be negative defocus, and the pulse is released. And repeating the preset times according to the depth-diameter ratio requirement, and finally cleaning impurities at the orifice. The invention aims to solve the problems of low processing efficiency and precision caused by complex film hole angle, small hole diameter and large depth-diameter ratio of a ceramic matrix composite component.

The invention provides an ultrathin broadband sound absorption composite structure which comprises a plurality of silencing units, every two of the silencing units are in contact with each other on the same plane to form the three-dimensional ultrathin broadband sound absorption composite structure, each silencing unit comprises a shell, a through hole is formed in each shell, and the through holes are communicated with the silencing units. A thin film is arranged in the position, located in the center of the three-dimensional ultra-thin broadband sound absorption composite structure, of the shell, a micro-pore plate is arranged in the position, located on the periphery of the three-dimensional ultra-thin broadband sound absorption composite structure, of the shell, and the micro-pore plate or the thin film or other resonance structures are arranged in the micro-pore plate or the thin film or other resonance structures in the micro-pore plate or the thin film or other resonance structures. The ultra-thin broadband sound absorption composite structure provided with the micropore plate and the thin film is small in size, the thickness of the ultra-thin broadband sound absorption composite structure is 1 / 23 of the sub-wavelength size, the ultra-thin broadband sound absorption composite structure has the ultra-thin characteristic, the sound absorption frequency band is wide, the noise reduction effect is good, and the ultra-thin broadband sound absorption composite structure can be suitable for sound absorption and noise reduction of various small places and spaces.

The invention provides a low-damage CFRP laser drilling device and method based on dynamic multi-mode light beam regulation and control. The CFRP laser drilling device comprises an ultrafast laser source, a dynamic light field regulation and control module, a double-pulse regulation and control module, a galvanometer scanning module, a motion module and a controller module, the ultrafast laser source, the dynamic light field regulation and control module, the double-pulse regulation and control module and the galvanometer scanning module are arranged on the same light path, and the motion module is used for bearing a workpiece to be machined. The controller module is connected with the ultrafast laser source, the dynamic light field regulation and control module, the double-pulse regulation and control module, the galvanometer scanning module and the motion module. According to the method, the energy density can be accurately regulated and controlled in a microsecond-level time domain and a micron-level space range, so that the CFRP microporous structure with low heat influence, high consistency and high geometric accuracy is prepared, the stability and reliability of the machining process are effectively improved, and the requirement for micropore precision machining in the fields of aerospace and precision manufacturing is met.

The invention relates to the technical field of polymer compositions, and discloses a fiber microcrack self-healing composition with a shape memory characteristic, which comprises modified polyester containing thermally reversible dynamic covalent bonds and an asymmetric polyether-polyester block copolymer interface regulator, the melt index ratio of the interface regulating agent to the modified polyester is 1.8-3.2, and the interface regulating agent is distributed on the periphery of the modified polyester to form a core-shell microdomain. By utilizing the rheological gradient among the components, the interface regulating agent forms a low-viscosity flowing layer when the matrix shrinks; and the modified polyester is restrained to directionally migrate towards the tip of the fiber microcrack, so that active closing and densification filling of the crack area are realized, micro holes in the repaired area are eliminated, and the mechanical continuity of the composition in a dynamic environment is kept.

The invention belongs to the technical field of precision measurement, and relates to a microstructure three-dimensional measurement method and device based on composite sensing collaboration, and the method comprises the following steps: fixing a to-be-measured workpiece on a rotary table, and moving a to-be-measured hole into a measurement range; a camera collects an image of a hole to be detected, and a preliminary three-dimensional pose is obtained through preprocessing and fitting; converting the preliminary three-dimensional pose to a machine coordinate system, and controlling a rotary table to rotate by combining a probe measurement result, so that the hole axis is preliminarily aligned with the probe axis; the probe performs data acquisition and fitting on the to-be-detected hole to obtain a secondary three-dimensional pose; and converting the secondary three-dimensional pose to a machine coordinate system to obtain a measurement result. According to the technical scheme, through the synergistic effect of the camera and the probe, the measurement precision and efficiency of the microstructure hole can be effectively improved, more accurate three-dimensional measurement is provided, and the requirement that when array micropore priori knowledge is unknown or machining errors exist, multiple parameters can still be measured at the same time and the precision is high is met.

The utility model relates to the technical field of spray heads, in particular to a spray head for spraying a special-shaped pipeline, which comprises an air motor and a driving shaft in the air motor, the driving shaft is of a hollow structure, a conveying pipe is arranged in the driving shaft in a penetrating manner, a conical head is arranged at one end of the conveying pipe, a plurality of groups of first micro holes are arranged outside the conical head, and a plurality of groups of second micro holes are arranged outside the conical head. A conical cover is detachably connected to the outer portion of the driving shaft, a plurality of sets of second micro holes are formed in the outer portion of the conical cover, the conical cover is made to rotate at a high speed through a controllable high-speed rotating air motor, uniform atomization of paint is facilitated, in addition, accurate second micro hole machining and design are carried out on the conical cover, and the machining efficiency is improved. The spraying effect is more uniform and attractive; paint is conveyed through the driving shaft, the conical cover is of a sealed structure, and the problem of paint leakage of the open conical cover is solved. According to the utility model, secondary atomization is carried out on high-viscosity paint by adopting air-assisted atomization, so that the uniformity and the appearance state of a final paint film are greatly improved.

Furniture such as desks and other items are provided with sound absorbing features consisting of micro-perforations extending through structures having vertical surfaces. The micro-perforations are formed using a LASER cutting tool or a punch and are either cylindrical or frustoconical. The micro-perforations are formed in drawer facings, doors, support structures, and free-standing objects and storage devices having vertical surfaces. The micro-perforations have diameters in the range of 0.20 to 0.70 mm. The micro-perforations have been found to increase sound absorption of a desk by as much as 4 Sabins within the frequency range of 100 to 5,000 Hz. Structural panels consisting of front and rear micro-perforated panels surrounding a porous central core may be employed in such furniture.

This utility model relates to a composite copper foil conductive layer structure, comprising a substrate layer, a transition layer, and a conductive layer. The conductive layer is located on the surface of the substrate layer, and the transition layer is located between the substrate layer and the conductive layer. Micropores are formed on the surface of the substrate layer by plasma etching. The transition layer is formed on the surface of the substrate layer by magnetron sputtering. Cross-linked mesh grooves are formed on the surface of the conductive layer by laser engraving or chemical etching. This structure, through a multi-layer composite design, provides mechanical support through the substrate layer, enhances interfacial bonding through the transition layer, and optimizes conductivity through the conductive layer. By combining a lightweight substrate with a highly conductive metal layer, a balance between high strength, high flexibility, and excellent electrical performance is achieved.

The utility model discloses a 3D printing secondary EVA (Ethylene Vinyl Acetate) mold micropore mold, belongs to the field of molds, and aims to solve the problem that the quality of a finished product is poorer due to the existing treatment mode for patterns on the side wall of a shoe sole. According to the technical scheme, the lower die comprises a lower die core, grain protrusions are arranged on the inner wall of the lower die core, a plurality of micropore channels used for exhausting are formed in the lower die core through the 3D printing technology, and the micropore channels are formed in the sharp corner positions, the ridge lines and the pattern turning points of the grain protrusions. The air holes are formed in the sharp corner positions, the ridge lines and the pattern turning points through the 3D printing technology, so that the problems of bubbles, pits or other defects are effectively solved, compared with an existing conventional machining mode of increasing the hole diameter of the air holes, the technology can effectively control the hole diameter of a micropore channel, and the hole diameter of the micropore channel is increased. And therefore, the problems of burrs and bulges can be effectively avoided, and the product quality is further improved.

The invention discloses a preparation method of a modified graphite / copper composite heat sink material, and belongs to the technical field of metal-based composite materials. The method comprises the following steps: carrying out acid activation on crystalline flake graphite, modifying the crystalline flake graphite with a silane coupling agent, and selectively stripping to obtain graphite nanosheets; preparing copper-based alloy powder containing at least two carbides of Zr, Cr and Ti; performing graded ultrasonic-ball milling composite dispersion on the surface modified graphite powder, the copper-based alloy powder, the nano-diamond powder, the carboxyl functionalized multi-walled carbon nanotubes and the graphene oxide; gradient filling cold pressing forming and pre-sintering are carried out; performing hot pressing / spark plasma sintering, applying a magnetic field or a vibration field to realize graphite orientation, generating a carbide interface transition layer in situ, and reducing graphene oxide; and after machining, pulse electrodeposition is carried out on the copper-graphene composite coating, and surface micropores / micro textures and phase change material filling can be selectively formed. The method is suitable for efficient heat management of high-power electronic devices.

The application discloses an improved semi-additive process based on customized ultra-thin copper foil flexible copper-clad plate and a fine circuit board, and belongs to the technical field of flexible printed circuit boards. The process adopts a customized ultra-thin copper foil FCCL substrate, and the circuit is prepared through substrate selection pretreatment, pattern size pre-compensation, laser drilling and black shadow process hole metallization, pattern transfer and selective electroplating thickening, film stripping and flash etching forming. The micro-etching amount is cooperatively controlled throughout the process, and combined with optimized plasma cleaning and high hole filling electroplating, the fine circuit production with a minimum line width and line spacing of 45 microns or less can be stably realized, and the highest fine circuit production can reach 25 / 25 microns. The application solves the problems of traditional process, such as large side etching, low precision, poor yield and the like, and the circuit board prepared has the advantages of excellent size stability, strong heat resistance and uniform micro-hole filling, is suitable for high-density interconnection and high-end consumer electronic demand, and has significant advantages of precision, yield and reliability compared with existing processes.

The utility model relates to the technical field of micro-pore plates, in particular to an improved shallow-pore pore plate which comprises a rotating structure used for improving the mounting efficiency and a pore plate body used for bearing the pore plate, a hole is formed in one side of the pore plate body, the rotating structure is mounted in the hole, and a base is fixedly connected to the bottom of the pore plate body. Through the arrangement of the rotating structure which comprises the fixing rod, the gasket, the circular ring, the square block, the clamping rod, the groove, the eccentric wheel, the supporting rod, the nut and other components, the rotating structure can drive the clamping rod to move in the groove by rotating the eccentric wheel through the mutual matching relation between the eccentric wheel component and the clamping rod component, and therefore the position of the clamping rod is adjusted; the pore plate body can be quickly mounted and dismounted through the rotating structure, the problems that a traditional pore plate is low in mounting efficiency and inconvenient to dismount are solved, and the mounting and dismounting efficiency of the pore plate is improved.

This invention discloses a micro-perforated noise-reducing air outlet structure and a hair dryer with the micro-perforated noise-reducing air outlet structure. The micro-perforated noise-reducing air outlet structure includes a shell with an air outlet; a fan assembly installed inside the shell and axially distributing air towards the air outlet; and a micro-perforated component, which is a box-shaped structure with an inner cavity. The micro-perforated component is installed inside the shell and connected to the air outlet. The circumferential sidewall of the micro-perforated component and the inner sidewall of the air outlet are spaced apart to form an air outlet channel. Several micro-holes are opened on the sidewall of the micro-perforated component facing the fan assembly. The inner cavity is connected to the inside of the shell through the micro-holes, and a sound-absorbing component is placed in the inner cavity. The inner cavity of the micro-perforated component constitutes a sound-absorbing cavity that is not air-permeable, achieving a sound-absorbing effect without increasing wind resistance or reducing the air velocity and air pressure.

A gantry type bearing laser processing device comprises four parts of mounting base, synchronous belt sliding mechanism, gantry and tailstock. The gantry has three degrees of freedom, and a 90-degree right-angle laser head is mounted thereon. The laser head moves up and down and left and right in a vertical plane by using a lead screw sliding mechanism. The gantry moves in the front-back direction by using the synchronous belt sliding mechanism on the mounting base. The rotating tailstock has two degrees of freedom, and drives the three-jaw chuck to rotate as a whole by using the synchronous belt transmission. Meanwhile, the tailstock can rotate the three-jaw chuck from the horizontal clamping state to the vertical clamping state. The device has five degrees of freedom, and can realize laser processing of bearing radial inner and outer wall curved groove, micro-hole and other micro-texture morphology, and laser processing of bearing flat end face. The gantry structure of the device can adapt to the size change of the inner and outer diameters of the bearing and end face processing. The whole processing device can easily realize automatic laser processing of the bearing.

The embodiment of the invention provides a thin-wall metal material thinning method which comprises the steps that 1, the laser spot interval and the feeding frequency are calculated according to laser scanning parameters, and the laser scanning parameters comprise the feeding interval; 2, the thin-wall metal material component is obtained, and a to-be-machined face of the thin-wall metal material component is subjected to laser scanning according to the light spot interval to form a plurality of first-round micropores which are arranged at intervals; according to the light spot spacing, the feeding spacing and the feeding times, multiple rounds of circulating laser scanning are conducted on the to-be-machined face in sequence so that gaps between the first round of micropores can be filled, and a thin-wall metal material component with a loose modified layer is obtained; and 3, the loose modified layer is removed, so that thinning of the thin-wall metal material component is achieved. According to the embodiment, the adverse effect of heat accumulation on the workpiece in the laser machining process can be reduced while the thin-wall metal material component is thinned, the deformation resistance of the ultra-thin workpiece is improved, and the surface flatness of the workpiece is guaranteed.

The invention relates to the technical field of micropore machining, in particular to an ultrasonic micropore machining method and device, and the ultrasonic micropore machining method comprises the steps that a first ultrasonic vibration table is arranged between a workbench and a workpiece; the ultrasonic cutter punches the workpiece; the ultrasonic vibration table generates vibration and transmits the vibration to the grinding material flowing above the workpiece; determining the sound stream drag force Fdrag of the first ultrasonic vibration table on the abrasive particles in the abrasive material; determining the acoustic radiation force Frad of the first ultrasonic vibration table on the abrasive particles in the abrasive material; and the impulse I of the abrasive particles in the horizontal direction is determined based on the acoustic streaming drag force Fdrag and the acoustic radiation force Frad, and the impulse I is made to be larger than 0. And abrasive particles are driven to move through ultrasonic waves, so that the technical effect of improving the machining quality is achieved.

The utility model relates to the technical field of universal couplings, and discloses a dustproof and waterproof sealed type universal coupling which comprises two connecting blocks, and a main rotating shaft is installed on one side of each connecting block. According to the dustproof and waterproof sealed universal coupling, through the arrangement of the rubber sealing covers and the sealing mechanism, when the dustproof and waterproof sealed universal coupling is used, the rotating part is easily contaminated by external dust and water vapor due to the influence of the surrounding environment, so that the rubber sealing covers are mounted on one side of the main rotating shaft and one side of the auxiliary rotating shaft, and interference of the external dust and water vapor is reduced; sealing rings and supporting springs are further installed on the inner walls of the two sides of the rubber sealing cover to improve the sealing performance of the rubber sealing cover, and a plurality of heat dissipation micropores formed in the surface of the rubber sealing cover are matched for heat dissipation, so that the effect of reducing the influence of external dust and water vapor can be achieved while normal operation of the main rotating shaft and the auxiliary rotating shaft is not affected; and the service life of the universal coupling is prolonged.

The application provides a precision integrated machining system and method for machining tangential hole type centrifugal micro nozzle, which comprises the following steps: firstly, rough turning the end face and the outer circle of the bar stock clamped by the spindle tool system, then machining the tangential micro hole by the tangential micro hole drilling system, machining the coaxial flow channel hole, the part end face and the outer circle clamping face by the spindle tool system, repeating the machining and feed, removing the burrs at the inlet and outlet of the tangential micro hole, then driving the secondary spindle chuck to clamp the outer circle clamping face, rotating the spindle and the secondary spindle synchronously, machining the remaining outer circle by the spindle tool system until the part is cut off from the bar stock, clamping the cut-off part by the secondary spindle chuck, machining the cut-off end by the secondary spindle tool and removing the machining burrs. The application has small error and high production efficiency compared with the traditional machining method.

The invention belongs to the technical field of optics, and relates to a vortex laser capable of regulating spiral chirality. The invention aims to solve the problem that single chiral output cannot be realized due to degeneration of a + / -l topological charge vortex mode in a resonant cavity in the prior art. The vortex laser comprises a pumping source, a gain crystal, a concave mirror, an output coupling mirror and an adjustable scattering sheet arranged in a cavity, a non-periodic SiO2 nano-particle film is arranged on the surface of the scattering sheet, the transverse position of the scattering sheet is adjusted through a two-dimensional translation platform, mode symmetry is broken through differential loss generated by interaction of + l and-l vortex light beams and a random scattering structure, and active, continuous and reversible regulation and control of spiral chirality are achieved. The output coupling mirror is provided with a central micropore to select vortex mode oscillation and output, and astigmatism conversion and CCD detection are matched to accurately judge the chirality of an output light beam. The scheme is compact in structure, high in stability and suitable for the fields of optical tweezers, quantum communication, super-resolution imaging and the like.

The utility model relates to micro -hole array etching liquid even distribution device technical field, and disclose a kind of micro -hole array etching liquid even distribution device, including etching container, the screw cap of etching container upper side sealing arrangement and the etching piece of etching container inside arrangement, the etching container lower side is provided with shaking even mechanism, the filter drainage mechanism is provided in the etching container, the shaking even mechanism includes base, the base is set in etching container lower side, the base upper surface is fixedly connected with multiple supports, the side of the support similar is all fixedly connected with rotary table, multiple rotary table outer wall is rotatably connected with collar, the filter drainage mechanism is used to filter the impurity in etching container interior and strengthen liquid fluidity, to improve etching uniformity and effectively discharge impurity, the shaking even mechanism is used to shake etching container whole, to make liquid can have better fluidity and uniformity.

Provided are a heat-not-burn article and an aerosol-generating substrate. The substrate includes a columnar aerosol-generating segment body, which has a lip-proximal end and a lip-distal end at two axial ends thereof and includes an air channel hole and multiple microholes. The air channel hole penetrates the lip-proximal end along the axial direction of the segment body. The microholes are evenly distributed inside the segment body, communicate with each other and the air channel hole, and collect aerosol into the air channel hole. When heated, the microholes uniformize the aerosol's particle size. Heated aerosol enters the air channel hole (and adjacent ones) via the microholes for collection and has substantially the same particle size after passing through the microholes. Aerosol from different positions flows into a cooling segment, mix to improve uniformity, buffer, and fully accumulate aerosol, and ensure consistent aerosol concentration and taste across different heat-not-burn articles.

The invention provides a double-wall turbine blade large-depth-diameter-ratio film hole remelting-layer-free machining method which comprises the steps that a coaxial electric spark ultrasonic drilling integrated technology is adopted, an electric spark high-speed small hole machining technology is used for removing materials, an electric spark machining surface is subjected to finishing and reaming through drilling, the surface remelting layer is removed, meanwhile, the surface roughness is improved, and the remelting-layer-free machining method for the double-wall turbine blade large-depth-diameter-ratio film hole is achieved. And ultrasonic vibration is added in the drilling process to reduce orifice burrs and tool loss. The problem of machining slippage of large-depth-diameter-ratio inclined holes in the air film holes is solved through a staged technology and parameter development, meanwhile, based on signal control, extraction and contact sensing modes in the machining process, self-adaptive adjustment and control of the machining depth are achieved, and remelting-layer-free and wall-damage-free machining of the air film holes of the blade body of the double-layer-wall turbine blade is achieved. The method has the advantages that the method is suitable for remelting-layer-free and high-precision surface machining requirements of single-crystal-material double-wall turbine blade film holes, is suitable for machining of multi-model turbine blade film holes, and can be popularized to machining of precise micro holes such as spray rods and nozzle holes.

This invention belongs to the field of grinding disc manufacturing technology, specifically relating to a diamond positioning and implanted grinding disc and its manufacturing method. The grinding disc substrate undergoes a series of processes including degreasing and activation treatments, followed by basic nickel plating to form a base nickel plating layer. Then, using photolithography, a photosensitive dry film pattern with pre-drilled micro-holes is created on the surface of the nickel plating layer. Adhesive is then applied to fill the micro-holes, and diamond abrasive grains are implanted, ensuring the sharp corners remain upwards for initial fixation. Finally, the photosensitive dry film is removed, and a thicker nickel plating reinforcement treatment is performed, ensuring the diamond abrasive grains are firmly encapsulated by the nickel plating layer. This method utilizes photolithography to achieve precise positioning and uniform distribution of the diamond abrasive grains on the substrate surface, and through process control, maintains the abrasive grains in a favorable cutting posture with their sharp corners upwards, significantly enhancing the grain holding strength and effectively preventing loosening, collapse, or detachment. The resulting grinding disc exhibits superior cutting efficiency and stability.

This utility model relates to the field of magnesia-carbon brick technology, and more particularly to a composite microporous structure magnesia-carbon brick processing debris collection device. The device includes a rectangular base plate with a pair of rectangular collection dishes on top. Each collection dish has a cavity for holding magnesia-carbon brick debris. A screw thread, communicating with the cavity, is inserted into the lower left end wall of each cavity for discharging debris. A screw plug is threaded into the screw thread for sealing the screw thread. The bottom of the cavity is inclined to guide the debris after receiving it to the screw thread. The screw plug can be rotated to remove the screw thread, opening the screw thread to facilitate the discharge of debris. This allows for simple and labor-saving cleaning of a portion of the magnesia-carbon brick debris. A filter plate with mesh openings is attached to the cavity, filtering out small-sized debris. Fine debris is discharged to the bottom of the cavity for easy sorting and collection.

The application relates to the field of refractory materials, in particular to a surface treatment process for the bottom of an aluminum electrolysis cell, which solves the problem that composite metal objects are difficult to form a dense structure with non-metallic inorganic matters such as Si3N4 and SiC, and that more micropore gaps lead to the penetration of aluminum liquid and electrolyte into the refractory material and the damage of the refractory material, and the surface treatment process comprises the following steps: preparing a boric acid refractory brick, roughening the surface of a refractory bearing material, coating a permeable material on the outside of the refractory bearing material, the thickness of the permeable material being 1-10 mm, heat treatment at 1300-1420 DEG C for 5-12 h, removal of the excess permeable material to obtain a refractory material precursor, placing a barrier material on the surface of the refractory material precursor, forming a barrier layer through cold isostatic pressing, heat treatment, formation of a high-density impedance layer on the surface of the refractory material precursor, and completion of the surface treatment. The application can realize the combination of dense inorganic non-metal and metal, and improve the corrosion resistance of the refractory material.