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Simulation of abrasive flow machining process for 2D and 3D mixture models
Rupalika DASH,Kalipada MAITY
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 424-432 doi: 10.1007/s11465-015-0366-6
Improvement of surface finish and material removal has been quite a challenge in a finishing operation such as abrasive flow machining (AFM). Factors that affect the surface finish and material removal are media viscosity, extrusion pressure, piston velocity, and particle size in abrasive flow machining process. Performing experiments for all the parameters and accurately obtaining an optimized parameter in a short time are difficult to accomplish because the operation requires a precise finish. Computational fluid dynamics (CFD) simulation was employed to accurately determine optimum parameters. In the current work, a 2D model was designed, and the flow analysis, force calculation, and material removal prediction were performed and compared with the available experimental data. Another 3D model for a swaging die finishing using AFM was simulated at different viscosities of the media to study the effects on the controlling parameters. A CFD simulation was performed by using commercially available ANSYS FLUENT. Two phases were considered for the flow analysis, and multiphase mixture model was taken into account. The fluid was considered to be a Newtonian fluid and the flow laminar with no wall slip.
关键词: abrasive flow machining (AFM) computational fluid dynamics (CFD) modeling mixture model
Jun WANG
《机械工程前沿(英文)》 2010年 第5卷 第1期 页码 19-32 doi: 10.1007/s11465-009-0082-1
关键词: abrasive waterjet engineering ceramics depth of cut cutting performance nozzle oscillation machining
王金生,姚春燕,彭伟,金鑫, 陈世杰
《中国工程科学》 2012年 第14卷 第11期 页码 94-98
游离磨料线锯切割是将磨浆中的磨粒通过一定速度的细钢丝线带入切割区域,达到去除工件材料的目的。多股线由多根细金属线绕制而成,表面具有很多凹槽,与钢丝线光滑表面相比,可以输送更多的磨粒进入切割区域,从而提高切割效率。应用0.25 mm的多股线和0.25 mm的钢丝线对光学玻璃K9进行切割对比实验,结果表明,在相同工艺条件下,多股线的切割效率和表面粗糙度均优于钢丝线,但切缝宽度大于钢丝线。
Effects of process parameters on surface roughness in abrasive waterjet cutting of aluminium
M. CHITHIRAI PON SELVAN, N. MOHANA SUNDARA RAJU, H. K. SACHIDANANDA
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 439-444 doi: 10.1007/s11465-012-0337-0
Abrasive waterjet cutting is a novel machining process capable of processing wide range of hard-to-cut materials. Surface roughness of machined parts is one of the major machining characteristics that play an important role in determining the quality of engineering components. This paper shows the influence of process parameters on surface roughness (Ra) which is an important cutting performance measure in abrasive waterjet cutting of aluminium. Taguchi’s design of experiments was carried out in order to collect surface roughness values. Experiments were conducted in varying water pressure, nozzle traverse speed, abrasive mass flow rate and standoff distance for cutting aluminium using abrasive waterjet cutting process. The effects of these parameters on surface roughness have been studied based on the experimental results.
关键词: abrasive waterjet aluminium garnet water pressure mass flow rate traverse speed standoff distance
Ultra-precision ductile grinding of BK7 using super abrasive diamond wheel
ZHAO Qingliang, Brinksmeier Ekkard, Riemer Oltmann, Rickens Kai
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 350-355 doi: 10.1007/s11465-007-0061-3
关键词: ELID peripheral electrolytic in-process nickel-electroplated monolayer measurement
Molecular dynamics modeling of a single diamond abrasive grain in grinding
Angelos P. MARKOPOULOS,Ioannis K. SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 168-175 doi: 10.1007/s11465-015-0337-y
In this paper the nano-metric simulation of grinding of copper with diamond abrasive grains, using the molecular dynamics (MD) method, is considered. An MD model of nano-scale grinding, where a single diamond abrasive grain performs cutting of a copper workpiece, is presented. The Morse potential function is used to simulate the interactions between the atoms involved in the procedure. In the proposed model, the abrasive grain follows a curved path with decreasing depth of cut within the workpiece to simulate the actual material removal process. Three different initial depths of cut, namely 4 ?, 8 ? and 12 ?, are tested, and the influence of the depth of cut on chip formation, cutting forces and workpiece temperatures are thoroughly investigated. The simulation results indicate that with the increase of the initial depth of cut, average cutting forces also increase and therefore the temperatures on the machined surface and within the workpiece increase as well. Furthermore, the effects of the different values of the simulation variables on the chip formation mechanism are studied and discussed. With the appropriate modifications, the proposed model can be used for the simulation of various nano-machining processes and operations, in which continuum mechanics cannot be applied or experimental techniques are subjected to limitations.
关键词: molecular dynamics abrasive process chip formation cutting force temperature
Equipment–process–strategy integration for sustainable machining: a review
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0752-4
关键词: sustainable machining equipment process strategy manufacturing
Energy saving design of the machining unit of hobbing machine tool with integrated optimization
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0694-2
关键词: energy saving design energy consumption machining unit integrated optimization machine tool
Fixturing technology and system for thin-walled parts machining: a review
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0711-5
关键词: thin-walled part (TWP) fixture machining fixture categories fixture function
Recent advances in micro- and nano-machining technologies
Shang GAO, Han HUANG
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 18-32 doi: 10.1007/s11465-017-0410-9
Device miniaturization is an emerging advanced technology in the 21st century. The miniaturization of devices in different fields requires production of micro- and nano-scale components. The features of these components range from the sub-micron to a few hundred microns with high tolerance to many engineering materials. These fields mainly include optics, electronics, medicine, bio-technology, communications, and avionics. This paper reviewed the recent advances in micro- and nano-machining technologies, including micro-cutting, micro-electrical-discharge machining, laser micro-machining, and focused ion beam machining. The four machining technologies were also compared in terms of machining efficiency, workpiece materials being machined, minimum feature size, maximum aspect ratio, and surface finish.
关键词: micro machining cutting electro discharge machining (EDM) laser machining focused ion beam (FIB)
Eugene Averin
《工程(英文)》 2017年 第3卷 第6期 页码 888-891 doi: 10.1016/j.eng.2017.12.004
Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects
《机械工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11465-023-0769-8
关键词: nanoparticle-enhanced coolant minimum quantity lubrication biolubricant thermophysical properties turning milling grinding
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 98-107 doi: 10.1007/s11705-018-1775-y
Cholesterol plays a significant role in the organization of lipids and modulation of membrane dynamics in mammalian cells. However, the effect of cholesterol depletion on the eukaryotic cell membranes seems controversial. In this study, the effects of cholesterol on the topography and mechanical behaviors of CHO-K1 cells with manipulated membrane cholesterol contents were investigated by atomic force microscopy (AFM) technique. Here, we found that the depletion of cholesterol in cell membranes could increase the membrane stiffness, reduce the cell height as well as promote cell retraction and detachment from the surface, whereas the cholesterol restoration could reverse the effect of cholesterol depletion on the membrane stiffness. Increased methyl-β-cyclodextrin levels and incubation time could significantly increase Young’s modulus and degree of stiffing on cell membrane and cytoskeleton. This research demonstratede importance of cholesterol in regulating the dynamics of cytoskeleton-mediated processes. AFM technique offers excellent advantages in the dynamic monitoring of the change in membranes mechanical properties and behaviors during the imaging process. This promising technology can be utilized in studying the membrane properties and elucidating the underlying mechanism of distinct cells in the near-native environment.
关键词: cholesterol methyl-β-cyclodextrin atomic force microscopy Young’s modulus CHO-K1 cell
A review of low-temperature plasma-assisted machining: from mechanism to application
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0734-y
关键词: low-temperature plasma difficult-to-cut material machinability hydrophilization effect Rehbinder effect
Cryogenic minimum quantity lubrication machining: from mechanism to application
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 649-697 doi: 10.1007/s11465-021-0654-2
关键词: cryogenic minimum quantity lubrication (CMQL) cryogenic medium processing mode device application mechanism application effect
标题 作者 时间 类型 操作
Simulation of abrasive flow machining process for 2D and 3D mixture models
Rupalika DASH,Kalipada MAITY
期刊论文
Depth of cut models for multipass abrasive waterjet cutting of alumina ceramics with nozzle oscillation
Jun WANG
期刊论文
Effects of process parameters on surface roughness in abrasive waterjet cutting of aluminium
M. CHITHIRAI PON SELVAN, N. MOHANA SUNDARA RAJU, H. K. SACHIDANANDA
期刊论文
Ultra-precision ductile grinding of BK7 using super abrasive diamond wheel
ZHAO Qingliang, Brinksmeier Ekkard, Riemer Oltmann, Rickens Kai
期刊论文
Molecular dynamics modeling of a single diamond abrasive grain in grinding
Angelos P. MARKOPOULOS,Ioannis K. SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS
期刊论文
Energy saving design of the machining unit of hobbing machine tool with integrated optimization
期刊论文
role of cholesterol in modulation of morphology and mechanical properties of CHO-K1 cells: An in situ AFM
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
期刊论文