期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到49篇文章
< 1 2 3 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Achieving tip-based down-milling forming of nanograting structures with variable heights through precise control of nano revolving trajectories 认领 引用 被引量：2
1
作者 Bo Xue Huilin Yan +2 位作者 Zhengchang Liu Yongda Yan Yanquan Geng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第5期314-334,共21页
With the advantage of high light intensity due to low scatting, structural colors generated by metallic diffraction nanograting structures, used as a type of diffractive optical element, have shown great potential for... With the advantage of high light intensity due to low scatting, structural colors generated by metallic diffraction nanograting structures, used as a type of diffractive optical element, have shown great potential for application in industrial and scientific research fields such as optical anti-counterfeiting and sensors. Within the visible light wavelength range, the diffraction performance is highly dependent on the height and shape consistencies of the nanograting. However, there is still room for the improvement in the flexible control over structure formation through mechanical nanomachining within this scale. The novelty of this paper lies in proposing a machining strategy for nanograting structures with variable heights through precise regulation of the revolving trajectory using tip-based nano down-milling. It explores how different geometric features of trajectories impact the amount of material deformed into a grating and its distribution shape, referred to as undeformed grating area. By analyzing the forming mechanisms of nanogratings under various trajectories with finite element simulation, the desired undeformed grating area is successfully achieved, which is mainly extruded by the tip flank face to form the right facet of the grating, resulting in a small deformation degree and a high deformation efficiency. Three distinct types of revolving trajectories are filtered out according to five quantitative evaluation indicators for machining performance, namely material plastic deformation, grating profile consistency, grating height consistency, machining forces, and area transforming height, and then are compared in processing nanogratings with different heights. It is obtained that only by regulating the vertical vibration amplitude of the revolving trajectory, the semicircle trajectory with the optimal geometric features has the ability to machine high-quality nanograting structures with a continuous height variation of up to 220 nm in a spacing of 400 nm. 展开更多
关键词 tip-based nanomachining down-milling trajectory nanograting structures grating height undeformed grating area
暂未订购 下载PDF
7-axis synchronization-integrated on-the-fly laser texturing system of freeform surface:design and development 认领 引用
2
作者 Wenqi Ma Jinmiao Zhang +4 位作者 Liang Zhao Zhenjiang Hu Xuesen Zhao Tao Sun Junjie Zhang 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第1期435-451,共17页
While laser surface texturing(LST)is a promising manufacturing technique for surface functionalization,simultaneously realizing high precision and high efficiency in the LST of complex curved surface is challenging,du... While laser surface texturing(LST)is a promising manufacturing technique for surface functionalization,simultaneously realizing high precision and high efficiency in the LST of complex curved surface is challenging,due to continuously varied geometries of laser-matter incidence.In the present work,we propose a novel manufacturing system of 7-axis on-the-fly LST for complex curved surface,based on the integrated synchronization of 5-axis linkage motion platform with 2-axis galvanometer.Specifically,the algorithm for decomposing spatial texture trajectory on curved surface into low-frequency and high-frequency parts is established,based on which the kinematic model of synchronized 7-axis system is developed to derive the motion of each axis in both 5-axis linkage motion platform and 2-axis galvanometer simultaneously.Subsequently,the synchronized 7-axis LST system is experimentally realized,including the setup of mechanical stages integrated with optical path,the configuration of numerical control unit,and the development of processing software.Finally,case study of 7-axis on-the-fly LST of freeform aluminum surface is performed,and the advantages in terms of processing efficiency and texturing accuracy over 5-axis linkage LST are demonstrated.The correlation of reduced following errors between mechanical stages with the promoted performance of curved surface texturing by the 7-axis on-the-fly LST is further analyzed.Current work provides a feasible solution for establishing the manufacturing system for high performance LST of complex curved surface. 展开更多
关键词 laser surface texturing freeform surface multi-axis synchronization multi-axis linkage motion following error laser micromachining system
暂未订购 下载PDF
On-machine Precision Preparation and Dressing of Ball-headed Diamond Wheel for the Grinding of Fused Silica 认领 引用 被引量：6
3
作者 CHEN Mingjun LI Ziang +2 位作者 YU Bo PENG Hui FANG Zhen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第5期982-987,共6页
In the grinding of high quality fused silica parts with complex surface or structure using ball-headed metal bonded diamond wheel with small diameter,the existing dressing methods are not suitable to dress the ball-he... In the grinding of high quality fused silica parts with complex surface or structure using ball-headed metal bonded diamond wheel with small diameter,the existing dressing methods are not suitable to dress the ball-headed diamond wheel precisely due to that they are either on-line in process dressing which may causes collision problem or without consideration for the effects of the tool setting error and electrode wear.An on-machine precision preparation and dressing method is proposed for ball-headed diamond wheel based on electrical discharge machining.By using this method the cylindrical diamond wheel with small diameter is manufactured to hemispherical-headed form.The obtained ball-headed diamond wheel is dressed after several grinding passes to recover geometrical accuracy and sharpness which is lost due to the wheel wear.A tool setting method based on high precision optical system is presented to reduce the wheel center setting error and dimension error.The effect of electrode tool wear is investigated by electrical dressing experiments,and the electrode tool wear compensation model is established based on the experimental results which show that the value of wear ratio coefficient K’ tends to be constant with the increasing of the feed length of electrode and the mean value of K’ is 0.156.Grinding experiments of fused silica are carried out on a test bench to evaluate the performance of the preparation and dressing method.The experimental results show that the surface roughness of the finished workpiece is 0.03 μm.The effect of the grinding parameter and dressing frequency on the surface roughness is investigated based on the measurement results of the surface roughness.This research provides an on-machine preparation and dressing method for ball-headed metal bonded diamond wheel used in the grinding of fused silica,which provides a solution to the tool setting method and the effect of electrode tool wear. 展开更多
关键词 precision preparation electrical discharge dressing ball-headed diamond wheel fused silica
暂未订购 下载PDF
Enhanced photoresponse in WSe2/MoS2 heterobilayers optoelectronic device via programmable local nanostrain engineering 认领 引用 被引量：1
4
作者 Shunyu Chang Yongda Yan +1 位作者 Chen Li Yanquan Geng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第1期820-834,共15页
The application potential of tuning two-dimensional materials(2DMs)characteristics through strain engineering for wearable and flexible devices has been widely recognized.However,the challenges lie in achieving accura... The application potential of tuning two-dimensional materials(2DMs)characteristics through strain engineering for wearable and flexible devices has been widely recognized.However,the challenges lie in achieving accurate deterministic positioning,spatial modulation,controllable magnitude,and permanent nanostrains.Herein,motivated by the skin swelling caused by mosquito bites,a technique utilizing the heated nanotip in atomic force microscopy for thermomechanical nanoindentation is demonstrated.This method enables precise positioning of localized nanostrain and regulation of bandgap in tungsten diselenide(WSe2)/molybdenum disulfide(MoS2)heterobilayer transferred onto a flexible polymethyl methacrylate film.The magnitude of strain in the WSe2/MoS2 heterobilayer can be controlled by adjusting the parameters of nanoindentation,leading to a spatially modulated average strain of up to 2.5%on the ring-shaped expansion structure(RES).The local bandgap of the WSe2/MoS2 heterobilayer is spatially regulated through three distinct regions.In particular,the RES exhibits the largest extent of bandgap modulation,accompanied by a significant change of~12 meV.The nanostrain significantly enhances the photoresponse speed of the photodetector device.For instance,under illumination from a 405 nm wavelength-laser,the rise time and fall time are reduced by 75%and 87.52%,respectively,compared to the device without strain.Similarly,under illumination from a 532 nm wavelength-laser,the rise time and fall time are reduced by 66.67%and 80.60%,respectively.These findings demonstrate that the proposed method serves as a versatile way for improving the photoresponse of optoelectronic devices based on 2DMs. 展开更多
关键词 WSe2/MoS2heterobilayer local nanostrain thermomechanical nanoindentation local bandgap enhanced photoresponse performance
暂未订购 下载PDF
Modelling and experimental study of nanomilling 3D nanogrooves on GaSb surfaces 认领 引用
5
作者 Jiqiang Wang Wenhan Zhu +3 位作者 Yongda Yan Jaya Verma Xuesen Zhao Yanquan Geng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期715-735,共21页
Atomic force microscopy(AFM)tip-based nanofabrication is a simple and feasible method for machining nanostructures.However,existing studies primarily focus on fabricating grooves with constant width and depth,with lim... Atomic force microscopy(AFM)tip-based nanofabrication is a simple and feasible method for machining nanostructures.However,existing studies primarily focus on fabricating grooves with constant width and depth,with limited research dedicated to the fabrication of three-dimensional(3D)grooves.In this study,an AFM tip-based nanomilling technique is employed to fabricate 3D nanogrooves on single-crystal gallium antimonide(GaSb),with a focus on investigating the underlying material removal mechanism and subsurface damage.To enable accurate prediction of 3D groove profiles,a theoretical model was established to estimate the machining depth,accounting for variations in the vibration frequency and rotation radius during nanogroove fabrication.By systematically varying key parameters-including vibration frequency,applied load,and rotation radius-their influences on the morphology and quality of the fabricated nanogrooves were comprehensively investigated.Experimental results demonstrated that nanogrooves with well-controlled depth and surface quality could be achieved,particularly under optimized conditions involving higher vibration frequencies and lower applied loads.The analysis of transmission electron microscopy(TEM)indicated that the thickness of the amorphous GaSb layer induced by the machining process decreased with increasing vibration frequency,whereas the dislocation density increased.This increase in dislocation density contributed to work hardening,effectively mitigating subsurface damage.Furthermore,a nanofluidic memristor is prepared based on the machined high-quality 3D nanogrooves.These findings provide important insights into the nanomilling behavior of soft-brittle materials and offer a foundation for the precise and reliable fabrication of high-quality 3D nanogrooves via AFM tip-based techniques. 展开更多
关键词 nanomilling three-dimensional nanogroove single-crystal gallium antimonide material removal mechanism nanofluidic memristor
暂未订购 下载PDF
Cryo-ultramicrotomy fabrication of ultra-thin conductive PEDOT:PSS hydrogel films 认领 引用
6
作者 Hongbo Sang Yongda Yan Yanquan Geng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期5-8,共4页
Conductive polymer hydrogels have emerged as a fundamentally new class of soft electronic materials that effectively bridge the gap between biological compatibility and electronic functionality[1].These materials syne... Conductive polymer hydrogels have emerged as a fundamentally new class of soft electronic materials that effectively bridge the gap between biological compatibility and electronic functionality[1].These materials synergize the hydration capacity,mechanical softness,and biocompatibility inherent to hydrogels with the efficient electrical transport properties of conducting polymers.Such a unique combination makes them exceptionally suitable for integration with biological systems in applications ranging from continuous health-monitoring devices to implantable sensors and advanced human-machine interfaces. 展开更多
关键词 soft electronic materials cryo ultramicrotomy biological compatibility electronic functionality integration biological systems bridge gap efficient electrical transport properties conductive polymer hydrogels PEDOT PSS
暂未订购 下载PDF
Cutting path-dependent machinability of SiCp/Al composite under multi-step ultra-precision diamond cutting 认领 引用 被引量：13
7
作者 Shijin LU Junjie ZHANG +6 位作者 Zengqiang LI Jianguo ZHANG Xiaohui WANG Alexander HARTMAIER Jianfeng XU Yongda YAN Tao SUN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第4期241-252,共12页
Particle-tool interactions,which govern the synergetic deformation of SiC particle reinforced Al matrix composites under mechanical machining,strongly depend on the geometry of particle position residing on cutting pa... Particle-tool interactions,which govern the synergetic deformation of SiC particle reinforced Al matrix composites under mechanical machining,strongly depend on the geometry of particle position residing on cutting path.In the present work,we investigate the influence of cutting path on the machinability of a SiCp/Al composite in multi-step ultra-precision diamond cutting by combining finite element simulations with experimental observations and characterization.Be consistent with experimentally characterized microstructures,the simulated SiCp/Al composite is considered to be composed of randomly distributed polygonally-shaped SiC particles with a volume fraction of 25 vol%.A multi-step cutting strategy with depths of cut ranging from 2 to 10 lm is adopted to achieve an ultimate depth of cut of 10 lm.Intrinsic material parameters and extrinsic cutting conditions utilized in finite element simulations of SiCp/Al cutting are consistent with those used in corresponding experiments.Simulation results reveal different particle-tool interactions and failure modes of SiC particles,as well as their correlations with machining force evolution,residual stress distribution and machined surface topography.A detailed comparison between numerical simulation results and experimental data of multi-step diamond cutting of SiCp/Al composite reveals a substantial impact of the number of cutting steps on particle-tool interactions and machined surface quality.These findings provide guidelines for achieving high surface finish of SiCp/Al composites by ultra-precision diamond cutting. 展开更多
关键词 Cutting path Diamond cutting Finite element simulation Particle-tool interaction SiCp/Al composites
暂未订购 下载PDF
Numerical simulation of materials-oriented ultra-precision diamond cutting:review and outlook 认领 引用 被引量：7
8
作者 Liang Zhao Junjie Zhang +3 位作者 Jianguo Zhang Houfu Dai Alexander Hartmaier Tao Sun 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2023年第2期1-21,共21页
Ultra-precision diamond cutting is a promising machining technique for realizing ultra-smooth surface of different kinds of materials.While fundamental understanding of the impact of workpiece material properties on c... Ultra-precision diamond cutting is a promising machining technique for realizing ultra-smooth surface of different kinds of materials.While fundamental understanding of the impact of workpiece material properties on cutting mechanisms is crucial for promoting the capability of the machining technique,numerical simulation methods at different length and time scales act as important supplements to experimental investigations.In this work,we present a compact review on recent advancements in the numerical simulations of material-oriented diamond cutting,in which representative machining phenomena are systematically summarized and discussed by multiscale simulations such as molecular dynamics simulation and finite element simulation:the anisotropy cutting behavior of polycrystalline material,the thermo-mechanical coupling tool-chip friction states,the synergetic cutting responses of individual phase in composite materials,and the impact of various external energetic fields on cutting processes.In particular,the novel physics-based numerical models,which involve the high precision constitutive law associated with heterogeneous deformation behavior,the thermo-mechanical coupling algorithm associated with tool-chip friction,the configurations of individual phases in line with real microstructural characteristics of composite materials,and the integration of external energetic fields into cutting models,are highlighted.Finally,insights into the future development of advanced numerical simulation techniques for diamond cutting of advanced structured materials are also provided.The aspects reported in this review present guidelines for the numerical simulations of ultra-precision mechanical machining responses for a variety of materials. 展开更多
关键词 diamond cutting ultra-smooth surface material-oriented physics-based simulation model molecular dynamics finite element
暂未订购 下载PDF
Interference and grinding characteristics in ultra-precision grinding of thin-walled complex structural component using a ball-end grinding wheel 认领 引用 被引量：6
9
作者 Tingzhang WANG Henan LIU +2 位作者 Chunya WU Jian CHEN Mingjun CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第4期192-207,共16页
As for ultra-precision grinding of difficult-to-process thin-walled complex components with ball-end grinding wheels,interference is easy to occur.According to screw theory and grinding kinematics,a mathematical model... As for ultra-precision grinding of difficult-to-process thin-walled complex components with ball-end grinding wheels,interference is easy to occur.According to screw theory and grinding kinematics,a mathematical model is established to investigate the interference and grinding characteristics of the ball-end wheel.The relationship between grinding wheel inclination angle,C axis rotation angle,grinding position angle and grinding wheel wear are analyzed.As the grinding wheel inclination angle increases,the C axis rotatable range decreases and the grinding position angle increases.The grinding position angle and wheel radius wear show a negative correlation with the C axis rotation angle.Therefore,a trajectory planning criteria for increasing grinding speed as much as possible under the premise of avoiding interference is proposed to design the grinding trajectory.Then grinding point distribution on the ball-end wheel is calculated,and the grinding characteristics,grinding speed and maximum undeformed chip thickness,are investigated.Finally,a complex structural component can be ground without interference,and surface roughness and profile accuracy are improved to 40.2 nm and 0.399 lm,compared with 556 nm and 3.427 lm before ultra-precision grinding.The mathematical model can provide theoretical guidance for the analysis of interference and grinding characteristics in complex components grinding to improve its grinding quality. 展开更多
关键词 Ultra-precision grinding Complex component Ball-end grinding wheel Interference Grinding characteristics
暂未订购 下载PDF
Dynamic Accuracy Design Method of Ultra-precision Machine Tool 认领 引用 被引量：6
10
作者 Guo-Da Chen Ya-Zhou Sun +3 位作者 Fei-Hu Zhang Li-Hua Lu Wan-Qun Chen Nan Yu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2018年第1期167-175,共9页
Ultra-precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design(DAD) is indispensable... Ultra-precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design(DAD) is indispensable and the related research is rarely available. In light of above reasons, a DAD method of ultra-precision machine tool is proposed in this paper, which is based on the frequency domain error allocation.The basic procedure and enabling knowledge of the DAD method is introduced. The application case of DAD method in the ultra-precision flycutting machine tool for KDP crystal machining is described to show the procedure detailedly. In this case, the KDP workpiece surface has the requirements in four different spatial frequency bands, and the emphasis for this study is put on the middle-frequency band with the PSD specifications. The results of the application case basically show the feasibility of the proposed DAD method. The DAD method of ultra-precision machine tool can effectively minimize the technical risk and improve the machining reliability of the designed machine tool. This paper will play an important role in the design and manufacture of new ultra-precision machine tool. 展开更多
关键词 Dynamic accuracy design Ultra-precision machine tool Frequency domain Error allocation
暂未订购 下载PDF
Study of machining indentations over the entire surface of a target ball using the force modulation approach 认领 引用 被引量：4
11
作者 Yuzhang Wang Yanquan Geng +3 位作者 Guo Li Jiqiang Wang Zhuo Fang Yongda Yan 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2021年第3期64-72,共9页
A modified five-axis cutting system using a force control cutting strategy was to machine indentations in different annuli on the entire surface of a target ball.The relationship between the cutting depths and the app... A modified five-axis cutting system using a force control cutting strategy was to machine indentations in different annuli on the entire surface of a target ball.The relationship between the cutting depths and the applied load as well as the microsphere rotation speed were studied experimentally to reveal the micromachining mechanism.In particular,aligning the rotating center of the high precision spindle with the microsphere center is essential for guaranteeing the machining accuracy of indentations.The distance between adjacent indentations on the same annulus and the vertical distance between adjacent annuli were determined by the rotating speed of the micro-ball and the controllable movement of the high-precision stage,respectively.In order to verify the feasibility and effect of the proposed cutting strategy,indentations with constant and expected depths were conducted on the entire surface of a hollow thin-walled micro-ball with a diameter of 1 mm.The results imply that this machining methodology has the potential to provide the target ball with desired modulated defects for simulating the inertial confinement fusion implosion experiment. 展开更多
关键词 force modulation controllable indentations entire micro-ball surface microsphere center alignment
暂未订购 下载PDF
A novel method of water bath heating assisted small ball-end magnetorheological polishing for hemispherical shell resonators 认领 引用 被引量：3
12
作者 Jinchuan TIAN Mingjun CHEN +1 位作者 Jian CHENG Henan LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第12期451-460,共10页
Hemispherical shell resonator(HSR)is the core component of hemispherical resonator gyro.It is aφ-shaped small-bore complex component with minimum curvature radius less than 3 mm.Thus,traditional polishing methods are... Hemispherical shell resonator(HSR)is the core component of hemispherical resonator gyro.It is aφ-shaped small-bore complex component with minimum curvature radius less than 3 mm.Thus,traditional polishing methods are difficult to polish it.Small ball-end magnetorheological polishing method can polish the small components with complicated three-dimensional surface and obtain non-destructive surface.Therefore,this method is suitable for polishing HSR.However,the material removal rate of the ordinary small ball-end magnetorheological polishing is low,leading to long polishing time and low output of HSR.To solve this problem,a water bath heating assisted small ball-end magnetorheological polishing method is proposed in this research.The influence rule of processing parameters on the material removal rate is studied experimentally.A set of optimal processing parameters is obtained to maximize the material removal rate.Compared with the ordinary method,the material removal rate of the new method can be improved by 143%.Subsequently,an HSR is polished by the new method.The results show that the polishing time can be reduced by 55%,and the polished surface roughness can reach 7.7 nm.The new method has the great potential to be used in actual production to improve the polishing efficiency of HSR. 展开更多
关键词 Hemispherical shell resonator Magnetorheological fluid temperature Material removal rate Optimization Small ball-end magnetorheological polishing
暂未订购 下载PDF
Fabrication of Ordered Micro/Nanostructures Using Probe‑Based Force‑Controlled Micromachining System 认领 引用 被引量：1
13
作者 Yanquan Geng Yuzhang Wang +2 位作者 Jianxiong Cai Jingran Zhang Yongda Yan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2022年第6期178-193,共16页
This paper presents a probe-based force-controlled nanoindentation method to fabricate ordered microanostructures.Both the experimental and finite element simulation approaches are employed to investigate the influenc... This paper presents a probe-based force-controlled nanoindentation method to fabricate ordered microanostructures.Both the experimental and finite element simulation approaches are employed to investigate the influence of the interval between the adjacent indentations and the rotation angle of the probe on the formed microanostructures.The non-contacting part between indenter and the sample material and the height of the material pile-up are two competing factors to determine the depth relationship between the adjacent indentations.For the one array indentations,nanostructures with good depth consistency and periodicity can be formed after the depth of the indentation becoming stable,and the variation of the rotation angle results in the large difference between the morphology of the formed nanostructures at the bottom of the one array indentation.In addition,for the indentation arrays,the nanostructures with good consistency and periodicity of the shape and depth can be generated with the spacing greater than 1μm.Finally,Raman tests are also carried out based on the obtained ordered microanostructures with Rhodamine probe molecule.The indentation arrays with a smaller spacing lead to better the enhancement effect of the substrate,which has the potential applications in the fields of biological or chemical molecular detection. 展开更多
关键词 Ordered microanostructure Probe-based micromachining In-process force-controlled Indentation array Micro cutting
暂未订购 下载PDF
THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY OF CARBON NANOTUBE PROBE AND CONVENTIONAL ATOMIC FORCE MICROSCOPY PROBE ON SURFACE ROUGHNESS 认领 引用
14
作者 WANG Jinghe WANG Hongxiang +3 位作者 XU Zongwei DONG Shen WANG Shiqian ZHANG Huali 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS 2008年第5期62-64,共3页
In this paper,three different tips are employed,i.e.,the carbon nanotube tip,monocrystalline silicon tip and silicon nitride tip.Resorting to atomic force microscope(AFM),they are used for measuring the surface roughn... In this paper,three different tips are employed,i.e.,the carbon nanotube tip,monocrystalline silicon tip and silicon nitride tip.Resorting to atomic force microscope(AFM),they are used for measuring the surface roughness of indium tin oxide(ITO)film and the immunoglobulin G(IgG)proteins within the scanning area of 10μm×10μm and 0.5μm×0.5μm,respectively.Subsequently,the scanned surface of the ITO film and IgG proteins are analyzed by using fractal dimension.The results show that the ffactal dimension measured by carbon nanotube tip is biggest with the highest frequency components and the most microscopic information.Therefore,the carbon nanotube tip is the ideal measuring tool for measuring super-smooth surface,which will play a more and more important role in the high-resolution imaging field. 展开更多
关键词 Atomic force microscope Carbon nanotube probes Fractal dimension
暂未订购 下载PDF
Theoretical and Experimental Research on Error Analysis and Optimization of Tool Path in Fabricating Aspheric Compound Eyes by Precision Micro Milling 认领 引用 被引量：4
15
作者 CHEN Mingjun XIAO Yong +2 位作者 TIAN Wenlan WU Chunya CHU Xin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第3期558-566,共9页
Structure design and fabricating methods of three-dimensional （3D） artificial spherical compound eyes have been researched by many scholars. Micro-nano optical manufacturing is mostly used to process 3D artificial c... Structure design and fabricating methods of three-dimensional （3D） artificial spherical compound eyes have been researched by many scholars. Micro-nano optical manufacturing is mostly used to process 3D artificial compound eyes. However, spherical optical compound eyes are less at optical performance than the eyes of insects, and it is difficult to further improve the imaging quality of compound eyes by means of micro-nano optical manufacturing. In this research, nonhomogeneous aspheric compound eyes （ACEs） are designed and fabricated. The nonhomogeneous aspheric structure is applied to calibrate the spherical aberration. Micro milling with advantages in processing three-dimensional micro structures is adopted to manufacture ACEs. In order to obtain ACEs with high imaging quality, the tool paths are optimized by analyzing the influence factors consisting of interpolation allowable error, scallop height and tool path pattern. In the experiments, two kinds of ACEs are manufactured by micro-milling with different too path patterns and cutting parameter on the miniature precision five-axis milling machine tool. The experimental results indicate that the ACEs of high surface quality can be achieved by circularly milling small micro-lens individually with changeable cutting depth. A prototype of the aspheric compound eye （ACE） with surface roughness （Ra） below 0.12 p.m is obtained with good imaging performance. This research ameliorates the imaging quality of 3D artificial compound eyes, and the proposed method of micro-milling can improve surface processing quality of compound eyes. 展开更多
关键词 aspheric compound eyes （ACEs） micro milling tool path optimization
暂未订购 下载PDF
Recent advances in design and preparation of micro diamond cutting tools 认领 引用 被引量：9
16
作者 Hanzhong Liu Yongda Yan +4 位作者 Jiwen Cui Yanquan Geng Tao Sun Xichun Luo Wenjun Zong 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第6期236-262,共27页
Micro diamond tools are indispensable for the efficient machining of microstructured surfaces.The precision in tool manufacturing and cutting performance directly determines the processing quality of components.The ma... Micro diamond tools are indispensable for the efficient machining of microstructured surfaces.The precision in tool manufacturing and cutting performance directly determines the processing quality of components.The manufacturing of high-quality micro diamond tools relies on scientific design methods and appropriate processing techniques.However,there is currently a lack of systematic review on the design and manufacturing methods of micro diamond tools in academia.This study systematically summarizes and analyzes modern manufacturing methods for micro diamond tools,as well as the impact of tool waviness,sharpness,and durability on machining quality.Subsequently,a design method is proposed based on the theory of cutting edge strength distribution to enhance tool waviness,sharpness,and durability.Finally,this paper presents current technical challenges faced by micro diamond tools along with potential future solutions to guide scientists in this field.The aim of this review is to contribute to the further development of the current design and manufacturing processes for micro diamond cutting tools. 展开更多
关键词 micro diamond tool micro cutting diamond tool design tool quality wear resistance
暂未订购 下载PDF
Fabrication of Periodic Nanostructures Using AFM Tip-Based Nanomachining:Combining Groove and Material Pile-Up Topographies 认领 引用 被引量：6
17
作者 Yanquan Geng Yongda Yan +3 位作者 Jiqiang Wang Emmanuel Brousseau Yanwen Sun Yazhou Sun 《Engineering》 SCIE EI CAS 2018年第6期787-795,共9页
This paper presents an atomic force microscopy(AFM)tip-based nanomachining method to fabricate periodic nanostructures.This method relies on combining the topography generated by machined grooves with the topography r... This paper presents an atomic force microscopy(AFM)tip-based nanomachining method to fabricate periodic nanostructures.This method relies on combining the topography generated by machined grooves with the topography resulting from accumulated pile-up material on the side of these grooves.It is shown that controlling the distance between adjacent and parallel grooves is the key factor in ensuring the quality of the resulting nanostructures.The presented experimental data show that periodic patterns with good quality can be achieved when the feed value between adjacent scratching paths is equal to the width between the two peaks of material pile-up on the sides of a single groove.The quality of the periodicity of the obtained nanostructures is evaluated by applying one-and two-dimensional fast Fourier transform(FFT)algorithms.The ratio of the area of the peak part to the total area in the normalized amplitude–frequency characteristic diagram of the cross-section of the measured AFM image is employed to quantitatively analyze the periodic nanostructures.Finally,the optical effect induced by the use of machined periodic nanostructures for surface colorization is investigated for potential applications in the fields of anti-counterfeiting and metal sensing. 展开更多
关键词 Atomic force microscopy Nanomachining Periodic nanostructure Single-crystal copper
暂未订购 下载PDF
The interaction between grain boundary and tool geometry in nanocutting of a bi-crystal copper 认领 引用 被引量：5
18
作者 Zhanfeng Wang Tao Sun +5 位作者 Haijun Zhang Guo Li Zengqiang Li Junjie Zhang Yongda Yan Alexander Hartmaier 《International Journal of Extreme Manufacturing》 SCIE EI CAS 2019年第4期12-22,共11页
Anisotropy is one central influencing factor on achievable ultimate machined surface integrity of metallic materials.Specifically,grain boundary has a strong impact on the deformation behaviour of polycrystalline mate... Anisotropy is one central influencing factor on achievable ultimate machined surface integrity of metallic materials.Specifically,grain boundary has a strong impact on the deformation behaviour of polycrystalline materials and correlated material removal at the microscale.In the present work,we perform molecular dynamics simulations and experiments to elucidate the underlying grain boundaryassociated mechanisms and their correlations with machining results of a bi-crystal Cu under nanocutting using a Berkovich tool.Specifically,crystallographic orientations of simulated bi-crystal Cu with a misorientation angle of 44.1°are derived from electron backscatter diffraction characterization of utilized polycrystalline copper specimen.Simulation results reveal that blocking of dislocation motion at grain boundaries,absorption of dislocations by grain boundaries and dislocation nucleation from grain boundaries are operating deformation modes in nanocutting of the bi-crystal Cu.Furthermore,heterogeneous grain boundary-associated mechanisms in neighbouring grains lead to strong anisotropic machining behaviour in the vicinity of the grain boundary.Simulated machined surface morphology and machining force evolution in the vicinity of grain boundary qualitatively agree well with experimental results.It is also found that the geometry of Berkovich tool has a strong impact on grain boundary-associated mechanisms and resultant ploughing-induced surface pile-up phenomenon. 展开更多
关键词 nanocutting grain boundary tool geometry surface integrity molecular dynamics
暂未订购 下载PDF
Integrated Simulation Method for Interaction between Manufacturing Process and Machine Tool 认领 引用 被引量：3
19
作者 CHEN Wanqun HUO Dehong +2 位作者 XIE Wenkun TENG Xiangyu ZHANG Jiayi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第6期1090-1095,共6页
The interaction between the machining process and the machine tool （IMPMT） plays an important role on high precision components manufacturing. However, most researches are focused on the machining process or the mac... The interaction between the machining process and the machine tool （IMPMT） plays an important role on high precision components manufacturing. However, most researches are focused on the machining process or the machine tool separately, and the interaction between them has been always overlooked. In this paper, a novel simplified method is proposed to realize the simulation of IMPMT by combining use the finite element method and state space method. In this method, the transfer function of the machine tool is built as a small state space. The small state space is obtained from the complicated finite element model of the whole machine tool. Furthermore, the control system of the machine tool is integrated with the transfer function of the machine tool to generate the cutting trajectory. Then, the tool tip response under the cutting force is used to predict the machined surface. Finally, a case study is carried out for a fly-cutting machining process, the dynamic response analysis of an ultra-precision fly-cutting machine tool and the machined surface verifies the effectiveness of this method. This research proposes a simplified method to study the IMPMT, the relationships between the machining process and the machine tool are established and the surface generation is obtained. 展开更多
关键词 dynamic analysis state space surface generation machining interaction precision machining
暂未订购 下载PDF
Effect of structural parameters of Gaussian repaired pit on light intensity distribution inside KH_2PO_4 crystal 认领 引用 被引量：3
20
作者 肖勇 陈明君 +3 位作者 程健 廖威 王海军 李明全 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第8期540-547,共8页
KH2PO4 （KDP） crystal with excellent optical properties is a very important element of inertial confinement fusion （ICF） device. However, KDP crystal surface micro-defects severely reduce the crystal laser damage t... KH2PO4 （KDP） crystal with excellent optical properties is a very important element of inertial confinement fusion （ICF） device. However, KDP crystal surface micro-defects severely reduce the crystal laser damage threshold, affecting the crystal service life. In this paper, Gaussian repaired pit is used to replace the crystal surface micro-defects, in order to improve the laser damage resistance of the KDP crystal with surface micro-defects. At first, the physical model of Gaussian repaired pit is built by Fourier model method, and the accuracy of the method is analyzed. It is found that the calculation error can be reduced by increasing the product of the width-period ratio and the truncation constant of the repaired pit. The calculation results about the physical model of Gaussian repaired pit show that the light intensity distribution within the crystal is symmetrical, and there are evidently enhanced light intensity regions in the crystal. Meanwhile, the maximum relative intensity inside the KDP crystal decreases gradually with the increase of the width of the Gaussian repaired pit. Secondly, the Gaussian repaired pits with different widths and the same depth of 20 μm are processed by micro-milling. Their surfaces are very smooth and present the ductile cutting state under the microscope. Finally, the laser damage threshold of the Gaussian repaired pits on the surface of the KDP crystal sample is measured by a 3 ω, 6-ns laser. The results showthat the maximum threshold of the Gaussian repaired pits is 3.12 J/cm2, which is 60% higher than the threshold of initial damage point, and the laser damage threshold increases with the increase of the width of the Gaussian repaired pit. 展开更多
关键词 KH2PO4 Gaussian repaired pit Fourier modal method laser damage threshold
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 3 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈