698 results about "Micro holes" patented technology

The invention relates to the field of visual measurement of parts, in particular to a non-contact micropore form and roughness measurement method and system. The method comprises the following steps: carrying out initial contour scanning on a precision part, carrying out part detection base point analysis, and extracting an optimal coordinate base point; performing full-coverage scanning planning and panoramic image splicing based on the optimal coordinate base point to obtain a panoramic fusion image; geometric structure point depth identification is carried out on the panoramic fusion image, three-dimensional point cloud modeling is carried out, and a part CAD digital model is constructed; carrying out micropore shape key size calculation based on a part CAD (Computer Aided Design) digital model, carrying out geometric comparison calculation, and extracting an error value of each measurement point; and performing deviation visual mapping and comprehensive evaluation according to the error value of each measurement point, and outputting a comprehensive evaluation report. According to the invention, the precision part detection efficiency and precision are improved, and the production quality control and later problem traceability of the precision part are enhanced.

The invention belongs to the technical field of hard and brittle crystal material micropore machining, and particularly relates to an ultra-precision micropore multi-energy field coupling machining method and system.The method comprises the steps that the laser pulse frequency and power are set according to the workpiece material type and the micropore depth-diameter ratio, and a laser focus is positioned at the inner hole bottom of a workpiece; a modified structure extending in the axial direction of a hole is formed by controlling matching of a light spot and a hole diameter and the movement track of the light spot, in the machining process, a plasma nozzle and laser coaxially move, a modified area is removed in real time, a heat affected zone and the hole shape taper are restrained, meanwhile, vibration is applied to a workpiece through an axial ultrasonic vibration device, and machining precision is improved. And chip discharge is promoted, and stress and crack generation are reduced. The problems of serious thermal damage, poor hole shape precision, low machining efficiency and high energy consumption in the micropore machining process in the prior art are solved, and high-quality and high-precision machining of the high-depth-diameter-ratio micropore of the hard and brittle transparent crystal material is achieved.

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 belongs to the technical field of composite materials, and discloses a basalt-based composite nanomaterial as well as a preparation method and application thereof. According to the invention, ZIF-67 in MOF is innovatively loaded on basalt nanosheets, so that not only can the dispersity and interfacial compatibility of basalt be improved and the sheet layers be prevented from being agglomerated in the coating, but also micropores possibly existing among the nanosheets can be blocked through a porous structure of the basalt, and the shielding effect and the penetration resistance of the whole coating are improved. In addition, the introduction of ZIF-67 endows the composite material with more functional regulation and control possibilities, such as ion capture, intelligent slow release and the like, so that the protection performance of the coating in a complex environment is further enhanced. Compared with a traditional filler, the composite structure has the advantages of being controllable in cost, excellent in performance, environmentally friendly and the like, and a new thought is provided for functional design of a water-borne epoxy resin anticorrosive coating.

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 invention discloses a multifunctional foam pad made of a regenerated composite material and a production process of the multifunctional foam pad, and belongs to the technical field of production of regenerated composite materials. The surface of the recycled PET non-woven fabric printing layer is provided with 50 + / -5 [mu] m micropores, the cat palm bionic gradient foaming layer (the density is 0.15-0.35 g / cm < 3 > gradient distribution) is formed by blending and foaming PVC recycled materials, PET bottle chips and waste rubber powder, and the glass fiber net reinforced rubber matrix layer and the triangular pyramid micro-sucker bottom layer are arranged from top to bottom. The preparation process comprises the steps of waste material near-infrared sorting and pretreatment, multi-stage dynamic blending granulation, supercritical CO2 gradient foaming, bionic calendaring forming and laser positioning hot-pressing compounding, high-valued utilization of multi-element waste materials is achieved through combination of bionic structure design and a green process, the product has sound insulation, buffering and anti-skid performance, the tear resistance is improved by 150%, and the service life of the product is prolonged. The problems that a traditional foaming cushion depends on raw plastic, is single in function and causes manufacturing pollution are solved, and resource circulation and function strengthening unification are achieved.

The invention discloses a detachable soft gasket and method for thin plate grinding deformation control. The soft gasket structurally comprises a friction adsorption enhancement layer, a micropore vibration reduction layer and an elastic supporting layer which are detachably connected in sequence from top to bottom. In the soft gasket, the elastic supporting layer provides flexible buffering, the micropore vibration reduction layer absorbs machining vibration through a closed-cell micropore structure, the friction adsorption enhancement layer enhances the adsorption force and stability through non-uniform waveform raised grains and conical grooves, the bottom of the friction adsorption enhancement layer is designed in a sealed mode, grinding fluid permeation is effectively prevented, and all the layers cooperate with one another to improve the machining precision. The soft gasket is designed to be of a multi-layer structure, machining deformation is effectively reduced by providing a positioning reference, and the problems of initial deformation, end face jumping and planeness out-of-tolerance of the thin plate caused by a traditional rigid fixing or adsorption mode can be remarkably solved.

The invention relates to an automobile part cold stamping detecting and forming system which comprises a lower die, a plurality of pressure measuring micro holes are formed in the positions, corresponding to the corners of a special-shaped part, of the lower die, and a pressurizing mechanism for introducing pressurizing gas into the pressure measuring micro holes and an air pressure sensor for detecting air pressure changes are arranged outside the lower die; a punching die; forming a stock mold; the distance adjusting mechanisms are provided with first strokes, second strokes and additional strokes, and when the distance adjusting mechanisms are in the first strokes, the punching heads can penetrate through the stock dies to conduct punching; in the second stroke, the punching head does not completely penetrate through the shaping die; and the correcting controller is configured to control all the distance adjusting mechanisms to be adjusted to the second stroke and control the corresponding distance adjusting mechanisms to be adjusted to the additional stroke when the air pressure change detected by any air pressure sensor exceeds a preset value, and then the distance adjusting mechanisms are slowly recovered to the second stroke. The device can automatically detect the bad gap condition of the special-shaped part of the stamping part and control the shaping mold to slightly tilt for secondary shaping, so that the corner springback phenomenon of the special-shaped part of the stamping part is improved.

The invention belongs to the technical field of tungsten filament wire drawing equipment, and particularly relates to automatic tungsten filament wire drawing equipment and a tungsten filament cold drawing method.The automatic tungsten filament wire drawing equipment comprises a rack, a pay-off roller, a first cone pulley, a lubricating liquid water tank, a second cone pulley and a take-up roller are installed on the rack, and a wire drawing die is installed in the lubricating liquid water tank; lubricating pressing plates are installed in the lubricating liquid water tank and distributed on the left side and the right side of the wire drawing die in pairs. The lubricating pressing plate comprises a fixed plate and a movable plate, the fixed plate is fixedly installed on the bottom face of the lubricating liquid water tank, an adjusting screw rod and a rotating disc are installed on the movable plate, and contact rods are installed on the fixed plate and the movable plate; micropores are formed in the lubricating pressing plate; a tank cover is mounted on the lubricating liquid water tank; the tungsten wire drawing device is simple in structure, tungsten wires are positioned and restrained through the lubricating pressing plate, the position of the wire drawing die is adjusted, the tungsten wires coincide with the center line of the die hole, and the situation that the tungsten wires shake and flutter, and consequently the wire drawing die is subjected to unilateral abrasion is avoided.

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 silicon nitride ceramic trepanning, in particular to a femtosecond laser trepanning method and device for silicon nitride ceramic. The invention discloses a femtosecond laser trepanning method for silicon nitride ceramics. The method comprises the following steps: pre-preparation work; the fixed silicon nitride ceramic substrate is holed based on a three-stage scanning strategy, and the effective depth of field is constrained by the Rayleigh length; the three-stage scanning strategy is as follows: S1, low-energy grooving; s2, high-energy multiple cutting; s3, performing low-energy stroke trimming; annular feeding is executed according to a preset two-dimensional hole site vector path during scanning in each stage of the three-stage machining process. According to the method, high-quality and high-controllability micropore array processing can be realized on the silicon nitride ceramic substrate, and the method has wide engineering application value.

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 discloses a flexible sensor with pressure and humidity sensing functions and a preparation method thereof, and relates to the technical field of flexible electronics and sensing devices, and the flexible sensor comprises a microporous moisture-permeable protective layer, a dual-mode composite sensing layer, a pressure-sensitive microstructure layer, an elastomer protective layer and a thin film packaging layer which are sequentially attached from top to bottom, the dual-mode composite sensing layer comprises a humidity sensing layer, a film base material and a pressure sensing electrode layer, the humidity sensing layer is arranged on one side of the film base material, the pressure sensing electrode layer is arranged on the other side of the film base material, and the pressure sensing electrode layer is oppositely attached to the fingerprint-imitating microstructure of the pressure-sensitive microstructure layer; the pressure-sensitive microstructure layer is arranged in the gap of the elastomer protection layer, and the film packaging layer covers the pressure-sensitive microstructure layer and the elastomer protection layer. The flexible sensor provided by the invention can realize efficient sensing of pressure and humidity, and has wide application prospects in the fields of robot interaction, intelligent prostheses and the like.

A fixing rotating member, containing a resin base material, a heat generating layer extending on an outer peripheral surface of the resin base material, a silicon dioxide layer on an outer peripheral surface of the heat generating layer and on the outer peripheral surface of the resin base material in a region where the heat generating layer is not provided, and a resin layer on an outer peripheral surface of the silicon dioxide layer. The heat generating layer includes silver, the heat generating layer has a hole having an opening at a surface thereof facing the resin layer, the hole being at least partially filled with silicon dioxide, and the heat generating layer has pores.

The invention relates to the technical field of material permeability experiment devices, in particular to a microscopic seepage model simulation device which comprises a clamping assembly, a box body with an upward opening and an upper gland with a transparent observation window in the middle. The device is reasonable and compact in structure and convenient to use, sandstone particles can be compressed in the simulation bin through the upper gland, and a simulated sandstone layer with the same structure as an oil reservoir stratum sandstone is formed; the seepage liquid can more uniformly enter the vertical micropores in the rectification strip through the left diversion trench, and the horizontal micropores communicated with the vertical micropores can enable the seepage liquid to uniformly flow into the simulation bin from the right side surface of the rectification strip in a layered manner, so that the seepage liquid can flow in parallel in the simulative sandstone layer; therefore, the seepage liquid can simulate one-dimensional linear flow in the simulated sandstone layer, the situation that the seepage liquid has excessive turbulent flow to influence an experiment result is avoided, the flowing state of deep stratum fluid laminar flow can be simulated more truly, and a better experiment result is obtained.

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 invention belongs to the technical field of composite material processing, and discloses line body hot-pressing circulation equipment and a process, the line body hot-pressing circulation equipment comprises a preheating device, a discharging device, a profiling device, a cooling device, a material taking device and a transmission device, a closed circulation transmission path is formed through the transmission device, so that a plurality of molds are sequentially transmitted in each process, synchronous operation of each station is realized, and the production efficiency is improved. The productivity in unit time is effectively improved; the vacuum hot-pressing mechanism is used for carrying out hot-pressing treatment on the mold in a vacuum environment, so that bubbles and micropores are prevented from being generated; meanwhile, the composite material is reduced in viscosity and enhanced in fluidity in a vacuum state, and can fully infiltrate fibers and uniformly fill a mold cavity; the hot pressing mechanism immediately carries out pressure maintaining, curing and continuous forming treatment on the mold after vacuum hot pressing, and the material compactness is guaranteed; the cooling device is used for carrying out segmented cooling on the formed product, so that the deformation rate and the warping degree are obviously reduced; uniform beat control of all procedures is guaranteed, product batch consistency is guaranteed, energy consumption is reduced, and heat utilization efficiency is improved.

A sound absorption wood board belongs to the field of building decoration materials and is characterized in that a plurality of micropores are formed in a wide surface of a longitudinal section of the wood board, the hole depth is perpendicular to the surface of the wide surface, and the micropores are conical blind holes. The micropores are communicated with a plurality of cross section holes of the wood, a criss-cross micropore network is formed in the wood, sound waves can be deeply absorbed, the sound absorption capacity of the wood board is improved, the wood board is used for indoor decoration, the characteristics that original wood is attractive in appearance and free of pollution are reserved, and the wood board is suitable for being used as a sound absorption material of an indoor wall board or a shelf board.

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.