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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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    Simulation of Three-Dimensional Dynamic Cutting Forces and Chatter Stability in Ball-End Milling

    Jun ZhaoXiaofeng ZhangHanbing Luo
    P.302-307页
    查看更多>>摘要：By taking into account the regenerative chatter vibration, a nonlinear dynamics model for high speed ball-end milling is proposed. The effect of dynamic components of milling forces on chatter is analyzed. A method to predict the stability limits of high speed ball-end milling process is proposed and the stability lobes diagram is simulated. The comparison of experimental milling forces with the simulation results indicates the high accuracy of the model and the effectiveness of the simulation algorithms. The proposed method provides a theoretical instruction for parameters selection and optimization in milling processing.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Fuzzy Chatter Stability Lobes Model in Milling

    Ming ChenXiaohui ZhangWeiwei Ming
    P.308-313页
    查看更多>>摘要：Based on the conventional chatter stability model, stability Lobes diagram in die & mould steel milling system is obtained. The derived diagram can be divided into two independent regions by a Lobes curve: absolutely stable and instable region. In fact, it is more reasonable that there should be a transition stage between the stable and instable state. That is to say, grade of stability (GOS) should be in a closed interval [0, 1], rather than Boolean logic. Due to the different stability sensibilities for different order Lobe curve in milling system, there should be different widths of transition belts for different order curve. Thus, with the help of Sigmoid transfer function widths of each order Lobe curve are studied. Finally, the fuzzy chatter stability is implemented by an adjustable slope coefficient.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Research and Development of Four Axis Linkage Grinding Simulation System of Ball-Nose End Mill

    Lin HeXian Feng ZhaoHong Yan ShiJun Wang...
    P.314-317页
    查看更多>>摘要：The four axis linkage grinding simulation system of ball-nose end mill has be developed based on the mathematical model of four axis linkage grinding through establishing ball-nose end mill's parametrical database, constructing ball-nose end mill's and grinding wheel's solid models in Solidworks, simulating the grinding processes of the rake face and flank face of ball-nose end mill based on Boolean operation, and automatic NC programming of rake face and flank face grinding. The results show the grinding simulation system can be used to manufacture ball end mill.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Cutting Performance of Al_2O_3/TiC/TiN Nanocomposite Tools

    Hanlian LiuChuanzhen HuangBin Zou
    P.318-323页
    查看更多>>摘要：A multi-scale and multi-phase nanocomposite ceramic cutting tool material Al_2O_3/TiC/TiN(LTN) with high comprehensive mechanical properties has been successfully fabricated by means of adding micro-scale TiC and nano-scale TiN particles. The cutting performance and wear mechanisms of this advanced ceramic cutting tool were researched by turning two kinds of hardened steel 40Cr and T10A respectively. Compared with the commercial ceramic tool LT55, LTN showed a superior wear resistance with certain machining parameters. The machining tests indicated that the new materials tool is suitable for continuously dry cutting of hardened steel with high hardness at high speed.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Cutting Performance and Wear Mechanism of Si_3N_4-Based Nanocomposite Ceramic Tool

    Bin ZouChuanzhen HuangHanlian LiuJinpeng Song...
    P.324-329页
    查看更多>>摘要：Si_3N_4/TiN nanocomposite tool and Si_3N_4/Ti(C_7N_3) nanocomposite tool were prepared. The cutting performance and wear mechanism of Si_3N_4-based nanocomposite ceramic tool was investigated by comparison with a commercial sialon ceramic tool in machining of 45 steel. Si_3N_4-based nanocomposite ceramic tool exhibits the better wear resistance than sialon at the relatively high cutting speed. The increased cutting performance of Si_3N_4-based nanocomposite ceramic tool is ascribed to the higher mechanical properties. Nano-particles can refine the matrix grains and improve the bonding strength among the matrix grains of Si_3N_4-based nanocomposite ceramic tool materials. It contributes to an improved wear resistance of the cutting tools during machining.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Research on Five-Axis Dual-NURBS Adaptive Interpolation Algorithm for Flank Milling

    Yuhan WangJingchun FengSun ChaoMing Chen...
    P.330-335页
    查看更多>>摘要：In order to exploit the advantages of five-axis flank milling method for space free surface machining to the full, a definition of non-equidistant dual-NURBS tool path is presented first. On this basis, the constraint of velocity of points on the tool axis and the constraint of scanning area of the tool axis are deduced. Considering both of these constraints, an adaptive feed five-axis dual-NURBS interpolation algorithm is proposed. The simulation results show that the feedrate with the proposed algorithm satisfies both of the constraints and the machining time is reduced by 38.3% in comparison with the constant feed interpolator algorithm.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Factors in Practical Manufacturability Analysis of Layer-Based Machining (LBM)

    Yonghua ChenZhengyi YangRuihua Ye
    P.336-341页
    查看更多>>摘要：In layer based machining (LBM), a part is sliced into thick layers, and each layer is shaped by 5-axis robot machining. Therefore, this technique is expected to have the merits of both layered manufacturing and CNC machining. As a new process, manufacturability analysis of LBM is carried out to determine whether a given part is suitable for LBM or not. This analysis is further studied based on supportability analysis and machinability analysis. Results of the manufacturability analysis are used for LBM process parameter selection and build orientation determination.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Experimental Studies on the Influence of Cutting Parameters on Thrust Force and Torque during Drilling of GFRP with SiC Fillers

    Mouleeswaran Senthil KumarVijayan Krishnaraj
    P.342-346页
    查看更多>>摘要：The paper discusses the influence of cutting parameters such as cutting speed, feed rate and point angle on thrust force and torque while drilling of Glass Fiber Reinforced Plastic (GFRP) composites with Silican Carbide (SiC) fillers. The experiments were conducted during the drilling of GFRP with SiC fillers using four standard twist drills of point angles 90°, 100°, 110° and 120°. Conclusions thus drawn are presented and can be useful for the selection of the best cutting parameters.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Investigations on Drilling of Multimaterial and Analysis by ANN

    Vijayan KrishnarajRedouane ZitouneFrancis Collombet
    P.347-352页
    查看更多>>摘要：This paper presents experimental and analytical investigation on drilling of carbon fibre reinforced plastic and aluminium stacks. The experimental results conducted as per full factorial experimental design reveal that drill diameter and feed rate have significant effects in reducing thrust force and torque while spindle speed has the least effect. The analytical study is based on artificial neural network (ANN) training using feed-forward back propagation network. The correlations obtained by multi-variable regression analysis and ANN, indicate that ANN is more effective than regression analysis.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Investigation on Chip Morphology and Surface Quality in High-Speed Ball-End Milling of Inconel 718

    Harshad A. SonawaneSuhas S. Joshi
    P.353-358页
    查看更多>>摘要：The ball end milling process, commonly used for generating complex shapes, involves continuous variation in the uncut chip dimensions, which depends on the cutter geometry and the machining parameters. The proposed analytical model evaluates the undeformed and the deformed chip dimensions including chip length, width and thickness. The undeformed and deformed chip dimensions, is a function of cutter rotation angle, instantaneous cutter radius, helix angle, and other processing parameters. The surface quality, in the form of surface roughness, during high-speed ball end milling of Inconel 718 is also analysed in this paper.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd