112 results about "Large aspect ratio" patented technology

The invention relates to the technical field of composite materials, in particular to a large-length-diameter-ratio composite pipe fitting forming method which comprises the steps of S1, core mold splicing, S2, air pipe sleeving, S3, paving and winding, S4, core mold dissolving, S5, sealing and depoling, S6, flange mounting, S7, mold closing and bag making and S8, heating and curing. Wrapping the hot melt adhesive at the bonding position by using an aluminum foil adhesive tape, then removing the aluminum foil adhesive tape, sleeving the bonded core mold by using a release air pipe longer than the core mold, pouring acetone into the release air pipe, dissolving the EPS foam rod, completely sealing the inlet end of the release air pipe, and finally sealing the release air pipe. And the sealed release air pipe is pulled out of the pipe fitting prefabricated body, the pipe fitting prefabricated body is obtained, and then the composite pipe fitting is manufactured in cooperation with a female die and a bag. The technical problem that the large-length-diameter-ratio composite pipe fitting with the perfect inner surface effect and the perfect outer surface effect cannot be manufactured through an existing technology on the premise that the mechanical property of a product is guaranteed is solved.

The internal thread turning and grinding combined machining equipment comprises a machine tool body, a workpiece main shaft, an internal thread grinding wheel main shaft, an internal thread grinding wheel main shaft swing angle device and a turning tool device, an X-direction sliding plate and a Z-direction sliding plate are arranged on the machine tool body, and the turning tool device is arranged on the X-direction sliding plate. The turning tool device comprises a tool apron and a deep hole turning tool with one end fixedly connected with the tool apron, the internal thread grinding wheel spindle swing angle device and the turning tool device can be arranged on the X-direction sliding plate, and when an internal thread deep hole part with the large length-diameter ratio is dealt with, the deep hole turning tool and an internal thread grinding wheel spindle are used for achieving the technological process of firstly turning and then grinding; the clamping frequency is reduced, the machining precision is improved, the machining time is shortened, the machining cost is reduced, and the machining efficiency is improved.

The invention discloses a multi-layer combined unmanned aerial vehicle and a control method, and relates to the field of high-altitude long-endurance unmanned aerial vehicles, the multi-layer combined unmanned aerial vehicle comprises a plurality of sub-aircrafts, each sub-aircraft comprises a fuselage, an empennage, wings, wingtips and protrusions, the wingtips are arranged at the ends, away from the fuselage, of the left and right wings, and the wingtips can be in butt joint with the wingtips of the other aircraft; protrusions are arranged on the upper surface and the lower surface of each wing, the end faces of the protrusions can be in butt joint with the end faces of the protrusions of another airplane, and the protrusions can be used for containing an aircraft undercarriage at the same time. Through aggregation and recombination of a plurality of small unmanned aerial vehicles, a multi-layer combined unmanned aerial vehicle with a high aspect ratio is formed, and the combined unmanned aerial vehicle can effectively overcome the defect that the rigidity of wings of a traditional unmanned aerial vehicle with a high aspect ratio is insufficient and can carry an oversized radar conformal antenna with long wave bands such as meter waves and the like. And long-time air-hang detection of high-value targets such as stealth aircrafts and the like is realized.

This invention relates to a tooling and method for fabricating driven bevel gear assemblies using high aspect ratio bar stock. This method involves separately forming the driven bevel gear and its shaft, then welding them together to achieve integrated forming and welding. This results in the overall forming of the driven bevel gear assembly, avoiding welding deformation issues caused by the structural features of the assembly, improving the assembly's yield rate, and providing a solution for assembly structural design. This method can utilize smaller diameter raw material bars to fabricate driven bevel gear assemblies, not only achieving overall forming of the driven bevel gear assembly but also improving material utilization, increasing efficiency, and reducing costs.

The invention belongs to the technical field of micro-nano processing, and particularly relates to a Pt-HSQ-based high-resolution X-ray Fresnel zone plate and a preparation method thereof. According to the X-ray Fresnel zone plate, a Pt-HSQ metal-inorganic material system is adopted, a diffraction structure with a large aspect ratio and Pt material quasi-periodic dense stripes specially needed by an X-ray zone plate lens is formed through electron beam lithography and an ALD process, and diffraction focusing from a soft X-ray wave band to a hard X-ray wave band and imaging with an amplification function are achieved. The wave zone plate has excellent mechanical stability, and the irradiation resistance and morphology retentivity of the wave zone plate under high-energy irradiation are remarkably improved. And high-resolution X-ray focusing elements with different energy wavebands and different focal lengths can be prepared according to geometric design and material selection of the wave zone plate. The lens is suitable for microscopic imaging, coherent diffraction imaging, X-ray spectrum, nanometer detection and other scenes of a synchrotron radiation or off-line laboratory X-ray light source, and has wide popularization value and application prospect.

The application provides a large height-diameter ratio titanium-aluminum alloy blank manufacturing device and method. The method comprises the following steps: S10, designing a blank: designing a forging according to a target titanium-aluminum alloy blade; the forging comprises a blade root part, a blade body part and a blade crown part; presetting the shape and size of the blank according to the forging; S20, obtaining a forming die and a raw material: preparing the forming die according to the preset shape and size of the blank in step S10, and selecting a bar; S30, adopting the forming die to perform upsetting forming on the bar to obtain the blank; and performing hot working on the blank to obtain a target titanium-aluminum alloy blade forging. The large height-diameter ratio titanium-aluminum alloy blank manufacturing method and device can solve the problems of blank instability of a large height-diameter ratio metal bar and high mold cost caused by titanium-aluminum alloy isothermal forming, realize non-isothermal forming of a large height-diameter ratio titanium-aluminum alloy special-shaped part, improve material utilization, reduce waste of titanium-aluminum alloy material, and effectively reduce the machining cost of the blade.

The present application provides a battery pole piece defect detection method, computing device and storage medium, which relate to the field of target detection technology. The method includes: training a target detection network based on a battery pole piece surface defect dataset; the target detection network includes a backbone network based on a deformable downsampling convolution module, a feature fusion network based on a context enhancement module and a downsampling convolution block, and a detection head based on an attention mechanism; through the trained target detection network, defects in the battery pole piece surface defect image to be detected are detected. In the target detection network provided by the present application, the deformable downsampling convolution module can specifically improve the detection capability of target defects with large aspect ratios, the context enhancement module and the deformable convolution module can specifically improve the detection capability of small target defects, and the attention mechanism can improve the detection accuracy. Therefore, the detection accuracy and efficiency of battery pole piece surface defects are comprehensively improved.

The present invention provides a wax pattern preparation method for special-shaped castings, comprising the following steps: melting, stirring, and standing the wax material; performing segmented wax injection on a mold, wherein three wax injection nozzles are evenly arranged above the wax sample and inject downward, and another wax injection nozzle is located in the middle of the wax sample and injects radially; the segmented wax sample is taken out of the mold together with a urea core, and is shaped and dissolved in water at 20-25°C; the contact surfaces of adjacent segmented wax samples are bonded with AB glue; a sand box is provided outside the wax pattern, gypsum slurry is poured into the sand box, and the bottom of the wax pattern is sealed. By adopting the present invention, a high-precision assembled wax pattern suitable for special-shaped castings with a large aspect ratio can be prepared, the wax pattern segments prepared are easy to position and weld, the assembly process is simple, the assembly difficulty is low, and a complex and closed inner cavity structure of the wax pattern can be prepared at one time; and the problem of inconsistent shrinkage and deformation of the wax pattern during assembly and storage can be well prevented.

The utility model relates to the technical field of runner groove forming, in particular to a large-depth-to-width-ratio runner groove forming device which comprises a base, a guide column is arranged on the outer wall of the top end of the base, a cover plate is fixedly connected to the outer wall of the top end of the guide column, and a support is fixedly connected to the outer wall of the top end of the cover plate. The forming mechanism is arranged on the outer wall of the bracket; the forming mechanism comprises an electric push rod installed on the outer wall of the top end of the support, one end of a piston rod of the electric push rod is fixedly connected with a lifting frame, an installation groove is formed in the outer wall of the bottom end of the lifting frame, a limiting plate is installed on the inner wall of the installation groove, and a first sliding groove is formed in the outer wall of one side of the cover plate. According to the runner groove forming device, part of internal stress of metal can be released in the forming process through heating, so that the possibility of subsequent deformation is reduced, the template can be quickly replaced according to the forming requirement of the runner groove, the forming of the metal sheet runner groove is more stable, and the forming efficiency of the runner groove forming device is improved.

The present application belongs to the field of carbon fiber composite materials, and provides a method for improving the thickness direction thermal conductivity of asphalt-based carbon fiber composite materials. The purpose of the present application is to solve the problem of low thickness direction thermal conductivity of asphalt-based carbon fiber composite materials, and to improve their performance and reliability in the field of aerospace. The technical solution of the present application is: using chemical vapor deposition (CVD) method to prepare carbon nanotubes (CNT) with large aspect ratio on the surface of asphalt-based carbon fiber, thereby forming a new type of composite material with high thermal conductivity, low density and high temperature resistance. The innovation of the present application is: growing large aspect ratio CNT on the surface of asphalt-based carbon fiber, and constructing a heat conduction channel in the thickness direction of asphalt-based carbon fiber composite material, which significantly improves its thermal conductivity. The advantage of the present application is: simple and controllable method, excellent, stable and durable product performance, wide application and broad prospect.

The invention provides a spatial index construction method, retrieval method and system for a graph with a large length-width ratio, and the method comprises the steps: screening one or more graphs with the large length-width ratio when reading a target layout file, and constructing a corresponding spatial index database; matching operation is carried out on the screened graphs with the large length-width ratios, and target band-shaped index structures, target index bands and target binary tree nodes of the graphs with the large length-width ratios in the spatial index database are matched step by step, so that storage addresses of the graphs with the large length-width ratios are stored in the corresponding target binary tree nodes; updating the spatial index database; therefore, the spatial index database can be quickly constructed, and the target graph with the large length-width ratio in the target layout file can be quickly retrieved and positioned during layout design. The technical problems that an existing spatial index technology is poor in polygonal graph applicability to a target layout file, the index construction time is long, and the retrieval efficiency is limited are solved.

To provide a molded article having superior impact resistance and chemical resistance.SOLUTION: A molded article composed of a thermoplastic resin composition, wherein the thermoplastic resin composition has a sea-island structure, and in an SEM image obtained by observing a cross section of the molded article by SEM, when island portions of a specific area in the sea-island structure are defined as island portions I, a most frequent value of aspect ratio of the island portions I is less than 1.90, and the ratio of the number of the island portions I having an aspect ratio more than 1.95 and 2.25 or less to the total number of the island portions I is 17.0% or less.SELECTED DRAWING: Figure 1

The invention discloses a low-heat-input large-depth-to-width-ratio welding seam forming regulation and control method, and belongs to the technical field of laser machining. The invention aims to solve the problems of cracks, grain coarsening and welding deformation during welding of a large-thickness heat input sensitive material and the problem that a low-heat input pulse laser welding technology is not applied to thick plate welding. The method comprises the steps of 1, tacking a workpiece; 2, placing on a welding platform of a vacuum laser welding device, adjusting the welding position and fixing; 3, welding; and fourthly, welding parts are taken out of the cabin. The method is used for forming regulation and control of the welding seam with the low heat input and the large depth-to-width ratio.

This invention provides an ultrasonic electromagnetic rheological composite grinding and polishing method for ultra-large aspect ratio pipes. The method is characterized by: using a composite polishing method combining ultrasound, electric field, and magnetic field to simultaneously perform ultra-precision machining on the inner and outer surfaces of the ultra-large aspect ratio slender pipe (21); forming a composite field of ultrasound and electromagnetic field on the outer surface of the slender pipe, forcing the electromagnetic composite rheological fluid in the composite field to transform from a liquid into a high-strength semi-solid chain structure, forming a flexible polishing brush head to complete the outer surface machining; forming a composite field of ultrasound and magnetic field inside the slender pipe, forcing the grinding fluid (15) and its contained abrasive particles in the composite field to rotate along the inner pipe wall under the action of the composite field, completing the inner pipe machining; the same electromagnetic composite rheological fluid is used for both the inner and outer surface machining of the slender pipe. This method achieves simultaneous machining of the inner and outer surfaces in one process, greatly reducing machining time and improving machining efficiency while meeting the pipe machining requirements.

The present application discloses a chromium coating modified on the basis of V2O5 and a preparation method therefor. Components of a solid-phase diffusion agent used are: Cr: 30-50%; V2O5: 2-7%; SiC: 30-50%; NH4Cl: 1-5%; La2O3: 0-5%; and Y2O3: 2-5%. The chromium coating prepared in the present application has a uniform structure, a moderate thickness, sufficient diffusion of Cr atoms, and good metallurgical bonding between a diffusion layer and a substrate, is suitable for austenitic steel and high-temperature alloy components which are used in large boilers, oil and gas field transportation pipelines and other workpieces having a large aspect ratio and various complex shapes, and achieves excellent industrial mass production benefits.

The invention relates to the technical field of automatic assembly of initiating explosive device medicament equipment, and discloses a device and method for automatically rolling and assembling a copper removal agent in a combustible cartridge case with the large length-diameter ratio, the device comprises a supporting frame, the supporting frame is placed on the ground and used for placing other mechanisms, and a copper removal agent feeding mechanism is arranged on the supporting frame; the winding and shearing module workbench and the assembly executing mechanism are arranged on the upper layer of the supporting frame; the taking and placing clamping mechanism and the feeding and discharging mechanism are arranged on the lower layer of the supporting frame; by integrating the five core advantages of rapid feeding and discharging, high-precision automatic winding and shearing, automatic assembling, coaxial conveying and automatic disassembling and assembling and aiming at the characteristics that the length-diameter ratio of the large-length-diameter-ratio combustible cartridge is too large, the pipe wall is prone to deformation, and the structure is prone to damage, coaxial positioning operation and flexible process installation are adopted, full-process automation of winding and assembling is achieved, and the production efficiency is improved. The problems of poor manual operation consistency, uncontrollable quality, low efficiency, insufficient safety protection and the like in the prior art are solved.

A method for forming a back-illuminated image sensor includes providing a first semiconductor substrate having opposite first and second faces, thinning the second face, forming a plurality of deep trenches in the first semiconductor substrate, filling a flowable material into the deep trenches, and irradiating the flowable material with a UV light curing process to form first isolation structures to fill the deep trenches. By forming a flowable material in the deep trenches, and irradiating the flowable material with a UV light curing process to form first isolation structures to fill the deep trenches. Since the temperature of the UV light curing process is low, damage to device structures formed on the first semiconductor substrate can be reduced. In addition, the flowable material has good filling properties, and can be used to fill deep trenches with a large aspect ratio, so that the density of the finally formed first isolation structures is high, and the isolation effect can be effectively improved.

The invention provides a large aspect ratio conductive circuit ink-jet printing method, which specifically comprises the following steps: in an ink-jet printing process, controlling an emission angle of an infrared laser, keeping an intersection point of laser emitted by the infrared laser and an ink droplet falling track of a printing head above a printing substrate, and presintering and curing ink droplets before the ink droplets fall on the surface of the printing substrate; the invention further provides an ink-jet printing device for the conductive circuit with the large height-width ratio and an application method of the ink-jet printing device. The nano-silver ink for ink-jet printing is rapidly sintered through laser in the flying process, the high-performance conductive trace can be directly manufactured on the substrate, and the manufacturing efficiency and the quality of the final electronic trace are remarkably improved through the collaborative process of presintering in the ink droplet flying process and synchronously preheating the substrate; the large-aspect-ratio conductive circuit ink-jet printing device for achieving the method is simple in structure, flexible and convenient to operate and high in practicability, and the focusing accuracy of laser and ink droplets is improved.

The application discloses a large-length-diameter-ratio rotor structure with a separated turbine, comprising a four-stage fan, a two-stage front turbine, a single-stage rear turbine, four bearing supporting points, a connecting structure and the like. A 1-2-1 four supporting point supporting scheme is adopted, and an intermediate supporting point is additionally arranged at the front turbine to control the bending deformation of the large-length-diameter-ratio rotor. Meanwhile, the two-stage front turbine in the middle section of the rotor is designed as an integrated ring cavity structure, the structure angular rigidity is enhanced, and the overall gyroscopic moment effect is exerted. The front turbine and the rear turbine are connected with the rotor shaft through a large-space double-centering-face stop mouth-toothed sleeve connection, the bending moment bearing capacity is improved, the gyroscopic moment of the wheel disc is fully applied to the shaft section, the rotor resonance speed safety margin is improved, and the bending deformation is controlled. The application is the first rotor structure proposed for a new engine with an inter-stage combustion chamber, and meets the dynamic design requirements of the rotor with the characteristics of the multi-stage separated turbine and the large-length-diameter ratio.

The utility model relates to a kind of general tool of large long diameter ratio special-shaped shell rotary inner chamber spraying, including tool table, annular support and compensation mechanism, two annular supports are fixedly installed in the tool table, the annular support top is uniformly distributed with three compensation mechanisms, large long diameter ratio special-shaped shell is penetrated two disc inner hole, is placed into tool table, by rotating adjusting lever and drive adjusting seat close to shell, wherein adjusting lever is screw-mounted with fixed seat, to realize the mobile adjustment of adjusting seat, multiple movable column is equipped on the side of adjusting seat, multiple column is equipped with abutting head close to shell body one end, abutting head is attached to shell surface, since shell is special-shaped shell, the deformation amount of multiple column end is not one after contacting shell, column moves in circular groove, and ring body moves, ring body moves will extrude spring, and abutting head one end is equipped with rubber layer cover, and is attached to shell, increase friction, protect shell surface.

The present invention belongs to the field of ultra-precision machining, and specifically relates to a pulsating abrasive flow polishing device for small holes with a large depth-to-diameter ratio, comprising a moving part, a driving part, and a workpiece part; the moving part comprises a driving block and a reciprocating driving mechanism, the reciprocating driving mechanism being used to drive the driving block to reciprocate in the front-to-back direction; the driving part comprises a push rod and an ejection mechanism, the ejection mechanism being used to eject the push rod forward; the workpiece part comprises a fixture assembly and a material cylinder, the fixture assembly being used to clamp the workpiece, the material cylinder being used to store abrasive and to slide with the push rod, the material cylinder being located between the fixture assembly and the push rod, and corresponding to the positions of the fixture assembly and the push rod. The present invention is provided with structures such as a moving part, a driving part, and a workpiece part, which can realize high-speed intermittent abrasive supply, give the abrasive a high-speed energy, enhance the turbulent kinetic energy of the fluid, and thus improve the polishing effect.

This invention discloses a turning device for square steel used in elevator racks after rolling, belonging to the field of square steel turning technology. It aims to solve problems encountered by existing devices when machining square steel with large aspect ratios and poor rigidity, such as easy vibration in the middle section, interference from positioning and vibration coupling, low centering accuracy, and increased errors due to steel chip jamming. The device includes a turning equipment base, a machine tool guide rail base, a chatter suppression mechanism, a positioning and locking mechanism, and a flexible stabilizing mechanism. The chatter suppression mechanism slides synchronously with the tool holder adjustment table, and adaptively supports the middle section of the square steel through bimetallic strip thermal induction. A displacement sensor detects deformation in real time. The positioning and locking mechanism is linked by an electrical signal, driving the centering component to automatically center via a telescopic rod and gear rack. A metal conductive sheet contacts an electrical contact button to trigger an electromagnet, causing the magnetorheological fluid to harden and lock the ejector pin. The flexible stabilizing mechanism achieves radial stabilization through a triangular turntable and flexible support rollers, and synchronously links with an air duct to blow away steel chips. The three mechanisms work together to form a closed loop, improving machining accuracy and stability, and adapting to the large-scale machining needs of square steel for elevator racks.

To provide novel organometallic complexes having bis- or tris-heteroleptic ligands and a large aspect ratio in one direction, and their use in OLEDs to enhance efficiency.SOLUTION: Provided is an OLED material represented by Formula III. (In the formula, rings A, B, C, and D are 5- or 6-membered carbon rings or heterocycles, L1-L4 are direct bond, BR, NR, PR, O, S, Se, C=O, S=O, etc., Q1-Q4 are selected from the group consisting of direct bond and oxygen, Z1-Z4 are carbon or nitrogen, and M2 represents Pt or Pd).SELECTED DRAWING: Figure 1

The present application relates to the field of extreme ultraviolet lithography protective film preparation, in particular to a preparation method of a single-walled carbon nanotube film with high strength and high extreme ultraviolet transmittance. In the process of growing single-walled carbon nanotubes by floating catalyst chemical vapor deposition, selenium is used as a growth promoter, and the weak etching effect of hydrogen flow is regulated to reduce amorphous carbon deposition and prolong catalyst life, so as to realize the controlled preparation and in-situ dry collection of single-walled carbon nanotubes with high purity, high crystallinity and large aspect ratio. The diameter distribution of the single-walled carbon nanotubes is 1.6-3 nm, the aspect ratio is >30000, the Raman spectrum G / D ratio is >150, and the purity of the prepared single-walled carbon nanotubes is >98wt.%. The prepared single-walled carbon nanotube film not only has excellent mechanical properties but also has adjustable EUV transmittance, and at the same time meets the particle interception and EUV high transmittance requirements of the EUV lithography protective film, and is an ideal protective film for EUV lithography mask.

The invention provides a method and device for strengthening the surface of a large-length-diameter-ratio rotary body component. The method comprises the following steps that A, the large-length-diameter-ratio rotary body component is clamped to a rotary clamping system; b) axially moving the rotary body component with the large length-diameter ratio in an autorotation state, and sequentially passing through an air cannon radial forging area and a nitrogen ion heat treatment area; and C) after the nitrogen ion heat treatment is finished, cooling to room temperature in a protective atmosphere to obtain the surface-strengthened revolution body component with the large length-diameter ratio. The air cannon is used for replacing a mechanical forging hammer, mechanical damage is avoided, and the method is particularly suitable for thin-wall and inner hole strengthening; forging and nitriding are continuous, a dislocation / grain boundary network generated by forging serves as a rapid nitrogen diffusion channel, and the infiltration speed and the infiltration layer binding force are remarkably improved. And forging temperature rise is directly used for subsequent nitriding, energy is saved, consumption is reduced, and tissue change caused by secondary heating is avoided. And the design of rotation, axial movement and array cannon groups is adopted, so that the surface strengthening uniformity of the super-long workpiece is ensured.

The present invention discloses a method for preparing flaky molybdenum powder. The method comprises adding silicone oil as a primary grinding aid along with an auxiliary grinding aid to spherical molybdenum powder, mixing to form a suspension, and then subjecting the mixture to intermittent ball milling and post-processing to obtain flaky molybdenum powder having an aspect ratio greater than 100. This preparation method utilizes silicone oil as a primary grinding aid to coat and modify the molybdenum powder surface, and achieves efficient preparation of flaky molybdenum powder by controlling ball milling parameters. The method has the advantages of strong operability and a high flake yield. The prepared flaky molybdenum powder exhibits a smooth surface, uniform particle size distribution, high specific surface area, and a large aspect ratio.

The application discloses a method for preparing a microlens array with a large height-width ratio by 3D printing, which comprises the following steps: (1) printing a printing material on a substrate by a 3D printing method to obtain a micrometer-level microlens droplet array; (2) inversely inverting the printed substrate until the height of the droplet no longer changes; and (3) solidifying the inverted droplet to obtain a microlens array with a large height-width ratio. The application further discloses a device for preparing a microlens array with a large height-width ratio. According to the application, the droplet is inverted, and under the action of gravity, the droplet is retracted downward to overcome the surface tension, so that a balance state of gravity and surface tension is achieved, and the height-width ratio of the droplet is improved. Moreover, the shortest inversion time can be greatly reduced by heating, and the height-width ratio of the droplet is further improved. The method of the application does not need complicated material processing, reduces the requirements for the viscosity, surface tension and thixotropy of the material, increases the application range of the printing material, and greatly improves the uniformity of the microlens array.

To provide a carbon nanofiber group having a large aspect ratio and with size and distribution specified, and a carbon nanofiber-containing composition in which the carbon nanofibers are contained in a base resin with good dispersibility, and provide a composition in which the carbon nanofibers are dispersed well in a base material at a higher concentration than conventional products, or a molded article or coating material having the composition.SOLUTION: Provided is a method for producing a carbon nanofiber-containing composition, wherein the base material contains a group of carbon nanofibers obtained by using pitch-based carbon fibers as a raw material, subjecting the raw material to dry grinding followed by wet grinding, the group of carbon nanofibers having a diameter in the range of 30 nm or more and 1000 nm or less, and a length in the range of 0.2 μm or more and 70 μm or less, with 50% or more of the total number distributed within said ranges, the method being characterized in that the content of a sizing agent in the group of carbon nanofibers is 0.1 mass% or less.SELECTED DRAWING: Figure 7

The intelligent damping device comprises a base, a piezoelectric laminated beam, a bearing, a bearing sleeve, an outer sleeve, an inner sleeve and a vibration isolation net, the inner sleeve, the vibration isolation net and the cutter are coaxially arranged, the vibration isolation net is located between the cutter and the inner sleeve, the bearing is arranged on the cutter in a sleeving mode, the bearing sleeve is arranged on the outer side of the bearing, and the piezoelectric laminated beam is arranged on the outer side of the bearing. The outer sleeve and the cutter are coaxially arranged, one end of the outer sleeve is connected with the base, the other end of the outer sleeve is suspended, and the multiple piezoelectric laminated beams are evenly arranged in the circumferential direction of the cutter. One end of the piezoelectric laminated beam is connected with the base, and the other end is connected with the bearing sleeve; the inner sleeve is connected with the handle; a piezoelectric layer capable of outputting acting force is arranged in the piezoelectric laminated beam, the outer sleeve is a rigid sleeve, and the piezoelectric laminated beam is connected with a piezoelectric actuator. Vibration reduction is conducted in the mode that active vibration suppression and passive vibration isolation are combined, and compared with a single passive vibration reduction or active vibration suppression mode, the vibration reduction effect is better improved, and the cutting stability is improved.

The present disclosure provides a method for fabricating a semiconductor structure and a semiconductor structure. The method includes forming a first stacked structure, forming a first target structure within the first stacked structure, forming a second stacked structure on the first stacked structure, and forming a second target structure in contact with the first target structure within the second stacked structure. In the present disclosure, the process of forming the target structure is divided into two processes: forming the first target structure and forming the second target structure. This reduces the depth of each process of forming the target structure and reduces the impact of an excessively large aspect ratio on the process.