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Key engineering materials
Trans Tech Publications Ltd.
Key engineering materials

Trans Tech Publications Ltd.

半月刊

1013-9826

Key engineering materials/Journal Key engineering materials
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    Surface/Subsurface Damage of Yttria Partially Stabilized Zirconia in Grinding using Monolayer Brazed Diamond Wheel

    Shusheng LiJiuhua XuYucan FuHonghua Su...
    p.326-329页
    查看更多>>摘要：A new brazed monolayer diamond grinding wheel is developed with the same continuous cutting edge distance on the wheel surface. Surface/subsurface damage of yttria partially stabilized zirconia (Y-PSZ) in grinding using monolayer brazed diamond wheel is analyzed. In this investigation, the influence of the maximum undeformed chip thickness (h_m) on material removal mechanism is analyzed. The experiment results show that the ground surface is almost in ductile material removal mode when h_m is below the critical value for Y-PSZ, otherwise it will be the combined removal modes of brittle and ductile when h_m is above the critical value.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Path Segmentation Algorithm for Automatic Guided Vehicle Based on Machine Vision

    Yuan ZhangPeng WangJixiang LiShiwei Yin...
    p.330-333页
    查看更多>>摘要：A novel path segmentation algorithm for automatic guided vehicle is designed by machine vision technology. Firstly, wiener filter based on parameter estimate is used to restore path image in HIS model. Secondly, mutivariate stepwise fitted regression method is adopted to smooth guide line edge of path image. It can be concluded that path guide line of automatic guided vehicle under industry surrounding may be recognized accurately through this way.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Experimental Study on the Effect of Cold Air Cutting on Cutting Temperature, Cutting Force and Tool Wear during Machinging of Cr12 Tool Steel

    J.L. RenY. SuX.Y. GuanY.W. Li...
    p.334-337页
    查看更多>>摘要：Cold air cutting is a kind of environmentally friendly cutting technology. The present study investigated the influence of cold air and cold air with oil mist on cutting temperature, cutting force and tool wear in the machining of Cr12 tool steel. For comparision, dry and flood coolant was also used as the cooling/lubrication conditions in the experiments. The findings of the study show that cold air with oil mist was the most effective cooling/lubrication condition in reducing the cutting temperature, cutting force and tool wear during the machining of Cr12 tool steel.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Finite Element Simulation of Residual Stress on the Surface in the Cutting Considering Tool Flank Wear

    Haitao LiuYazhou SunZesheng Lu
    p.338-341页
    查看更多>>摘要：Deformation caused by residual stress has been one of the main reasons influencing the machining accuracy, studies on machining residual stress should be performed. The tool flank wear on the cutting process has great influence on cutting heat which will infulence the distribution of residual stress, therefore,we should do the finite element simulation of cutting tool flank wear on the heat-affected firstly,then simulate and forecast the surface residual stress, studies on the effect of tool flank wear on the distribution of machined surface residual stress Johnson-Cook's coupled thermal-mechanical model is used as workpiece material model, thermal-displacement coupled brick are used to mesh, while friction between tool and work piece uses modified Coulomb's law whose slide friction area is combined with sticking friction. By means of FEA, residual stress on the machined surface and cutting temperature under different tool flank wear conditions are obtained. The results are compared and analyzed, and then we can get the fundamental influencing law on machined surface residual stress of tool flank wear.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Analysis of Cutting-press Compound Shaping Fin Structure

    Yan LiQilong YuanMingshun YangJianming Zheng...
    p.342-345页
    查看更多>>摘要：The cutting-press compound shaping technique is a green technology for manufacturing some functional surfaces such as fin-tubes. In practical application, different fin parameters and fin structures are required. Aiming to obtain different fin structures, the determination of the geometric parameters of the fins is discussed; according to the affects of the side cutting edge on the fin shapes, different fin structures under different side cutting edges are analyzed; which can provide guidance to obtain different fin structures under different applications.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Surface Roughness Model for Helical Milling of Die-steel Based on Response Surface Methodology

    Xuda QinSong HuaXiaolai JiShimao Chen...
    p.346-350页
    查看更多>>摘要：Holes making process is widely applied in die steel machining, Helical milling a hole, also called orbital drill, is hole making process by milling in which the center of end mill orbits around the center of the hole while spinning on its axis and moving in the axial direction. The paper presents the secondary regression prediction model of the holes surface roughness for helical milling of die-steel. To minimize the number of experiments for the design parameters, response surface methodology (RSM) with orthogonal rotatable central composite design is used. By means of variance analyses and additional cutting experiments, the adequacy of this model is confirmed. The model will be helpful in selecting cutting conditions to meet surface finish requirements in helical milling operation.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Experimental and Simulation Study on Diamond Convex Surface Film

    Duosheng LiDunwen ZuoJianyun ZhangWenzhuang Lu...
    p.351-354页
    查看更多>>摘要：Diamond convex surface films were synthesized on molybdenum substrate using DC plasma Jet CVD (DCPJCVD), and their microstructure and topography were characterized by those techniques such as X ray diffraction, Raman spectroscopy respectively. It showed that, when the substrate was pre-treated by polishing using successive micron diamond powder (about 30～3μm), diamond film was a polycrystalline texture and (111) faces were dominant. Raman spectrum shows that high quality diamond convex surface film was prepared successfully. Meantime, We used Finite element methods (FEM) to simulate the velocity, pressure and temperature fields of reaction chamber respectively, and it indicated that the distribution of the velocity, pressure fields were fluctuant, which had negative influence on diamond film, but the temperature fields is uniform, and it is an important factor to prepare high quality diamond convex surface film.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    A Novel 5-DOF NC Serial-Parallel Machine Tool and Its Position Analysis

    Hongjun SanShisheng ZhongZhixing Wang
    p.355-360页
    查看更多>>摘要：In this paper, a novel 5 degrees-of-freedom (DOF) numerical control (NC) serial-parallel machine tool is proposed. It can provide 3 translational DOF and 2 rotational DOF. The proposed mechine tool is composed of a 2-TPR/2-TPS special 4-DOF parallel mechanism in series with a rotatable component. The structure of this machine tool is simple. The machine tool can process the workpieces which have complex surfaces. The structural characteristics of this machine tool is introduced. The position inverse solution of this machine tool is deduced by analytical method and the position forward solution of this machine tool is achieved by numerical method.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Research on the Architecture of Networked Process Integration System for Windows Manufacturing

    X.B. ZeY.B. QuW. ZhangY. Fu...
    p.361-364页
    查看更多>>摘要：Enterprise dynamic alliance is an important enterprise mode for agile manufacturing which requires process integration system to provide many new characteristics to support the setup and operation of the enterprise dynamic alliance. Based on the analysis of production process characteristic for windows manufacture enterprises, a three-layer distributed structure thought of Browse / Server - based process integration system for windows industry is presented according to the function of process integration system., and the system architecture consisting of browser-client layer, application server layer, database server layer is constructed. At the same time, some requirements about design service and process service of process integration system for windows are presented. At last the realization method of the system is enucleated.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    The Cutting Behavior of Diamond Coated Tool in Machining Al-20wt%Si Alloy

    W.Z. LuD.W. ZuoB. YangF. Xu...
    p.365-368页
    查看更多>>摘要：The performance of CVD diamond coated cemented carbide cutting tool in comparison with K10 uncoated cemented carbide tool in the dry turning of Al-20wt%Si aluminum-silicon hypereutectic alloy was investigated. The obtained results showed a better cutting performance for CVD diamond coated tool in machining Al-20wt%Si, particularly in terms of cutting force, tool wear, surface roughness, when compared with K10. The cutting forces are lower with CVD diamond coated tool and the depth of cut promotes a great increment of the cutting force. The tool wear processes taking place in the tool tips in all cutting conditions. The tool life of CVD diamond coated tool is longer than that of the uncoated K10. The surface roughness Ra increases obviously with the increase of feed rate using a CVD diamond coated cutting tool. A higher feed rate produces surface rougher. The chip morphology in machining of Al-20wt%Si alloy by CVD diamond coated tool is continuous. The tests showed that the CVD diamond coated tool can be applied on the K10 tool at low feed rate to produce high quality surfaces.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd