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Technology and Innovation Conference, 2006. ITIC 2006. International

Date 6-7 Nov. 2006

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Displaying Results 1 - 25 of 460
  • Cover

    Publication Year: 2006 , Page(s): c1
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  • Title page

    Publication Year: 2006 , Page(s): i
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  • Copyright

    Publication Year: 2006 , Page(s): ii - iii
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  • Congratulation for the succeed of international technology and innovation conference 2006

    Publication Year: 2006 , Page(s): iv
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  • The Institution of Engineering and Technology

    Publication Year: 2006 , Page(s): v
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  • The Chinese Mechanical Engineering Society

    Publication Year: 2006 , Page(s): vi
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  • Contents

    Publication Year: 2006 , Page(s): 1 - 28
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  • Section 1 Advanced manufacturing technology

    Publication Year: 2006 , Page(s): 1
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  • Selective laser sintering of β-tricalcium phosphate for bionic scaffold

    Publication Year: 2006 , Page(s): 2 - 7
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (6085 KB)  

    In tissue engineering (TE), temporary bone scaffolds are main to guide cell proliferation and to lead to growing of new bone. β- tricalcium phosphate (β-TCP) is a biodegradable ceramic with potential application for bone replacement. In this study, selective laser sintering (SLS), a rapid prototyping technology (RP), was used to produce β-TCP scaffolds with near-net-shape, fully interconnected channel network, controllable porosity and pore size. In order to fabricate β-TCP scaffolds, several polymeric binders with different weight percentage (wt%) were mixed with β-TCP powder. In the paper, the X-ray diffraction and mechanical properties of the fabricated scaffolds were analysed. Microstructural assessments of the scaffolds were conducted using scanning electron microscope (SEM). SEM showed highly open, well interconnected, uniform pore architecture. Then the porosity and shrinkage of the scaffolds were assessed. The ability of these scaffolds to support bone mesenchymal stem cells culture was investigated in vitro. The results ascertained the potential of SLS-fabricated bone tissue engineering scaffolds. View full abstract»

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  • Research on intelligent CAPP system based on PDM

    Publication Year: 2006 , Page(s): 8 - 13
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    A practical model that describes the part multi-layer feature information and process feature information is proposed for analyzing the characteristics of process planning of small spindle parts machined in automatic machine. A CAD/CAPP system based on PDM is realized. An expert system for automatic sorting of working procedure and step is developed. Also the dynamic manufacturing resources management model is given for cutting parameters retrieval model, the dynamic decision-making of feature-based process routing and automatic calculation of process parameters. View full abstract»

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  • Development and application of a prototype micro EDM machine

    Publication Year: 2006 , Page(s): 14 - 18
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (5871 KB)  

    Miniaturization of instrument and device has changed the world greatly. Miniature instrument and device are composed of micro parts and microstructures. The realization of micro parts and microstructures calls for high micro machining capabilities. Micro electrical discharge machining (EDM) has earned its place in the field of micro machining because of its machining without contact and high ability to machine micro 3D structure, and has found wide application in industry. In this paper, a precision micro EDM machine is developed to improve micro machining capability of micro EDM. The machine adopts some high and new technologies. It consists of high precision XYZ stages with the resolution of 0.1 μm driven by linear motor, a high speed rotary spindle with rotation accuracy within 1 μm, high precision granite base which can decrease stray capacitance, small energy power unit and video microscopic system with high enlargement factor which is used to monitor the state of machining online. This prototype realizes a fast frequency of 50 Hz and a highest speed of 10 m/s in each of the X-, Y- and Z- axes, which improved micro machining capability remarkably. Experiments show that micro shafts with the diameter of less then 5 μm are ground by using block electrode, micro holes with the diameter of 10 μm and micro slots with width of 15 μm can be obtained steadily. At last, a complicated 3D microstructure is machined via EDM technology on this machine. View full abstract»

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  • Optimization methods of the product assembly line system

    Publication Year: 2006 , Page(s): 19 - 22
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (644 KB)  

    The assembly line can be regarded as a system consisted of complex disperse events considering the assembly process exists not only time sequence relations but also parallel and competitive relation. This article investigates the methods of modeling the product assembly line system based on information of assembly process flow, combined with the requirement that the auto electrical machine assembly should be adopted to multi-production, and the materiel flow and information flow change complicatedly in product assembly line, the system model of auto electrical machine assembly line is set up based on Petri net. The structure configurations and dynamic properties of the system are investigated by intuitionistic graphics format using Petri net. The operation performance of the system through reachability method is analyzed to optimize the system ensuring the key actions and the pivotal resources. Heuristic scheduling arithmetic is put forward and the emulation results are presented, the auto electrical machine assembly line recombining construction and optimization is achieved. The methods proved to be feasible and effective through the practice run of the product line. View full abstract»

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  • Development and manufacture of visual miniature loop heat pipe

    Publication Year: 2006 , Page(s): 23 - 27
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (5956 KB)  

    An innovative visual miniature loop heat pipe (mLHP) was manufactured using mechanical machining technique, material processing and thermal science. Components fabrication involves the production of compensation chamber (CC), evaporator, working fluid transport lines, condenser and capillary porous wick. A pressing mould was made in advance and the cold pressing sintering method was adopted to make the nickel wick. The wick porosity is 60% and effective pore radius is 5 εm measured by Scanning Electron Microscopy (SEM). The condenser was made of Acrylic glass to achieve the purpose of visualization. A novel transition joining method solved the problem of seal between glass and metal. To some extent, this fabrication process actualizes the visual research of the mLHP and provides a method to investigate the operational mechanism of mLHP. View full abstract»

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  • Study on technology of CNC whirlwind envelioping milling for screw

    Publication Year: 2006 , Page(s): 28 - 31
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (988 KB)  

    Whirlwind enveloping milling is a high-efficient machining method for screws. Aiming at a single screw, double-heads pump rotors which is high in quantity supplied, this paper introduces the basic principle of inner whirlwind enveloping milling technology, studies an arithmetic for spatial path when the centre of cutting tools moves relative to workpiece to envelope helical surface, and analyzes the primary parameters influencing on machining process by example. The method will improve the machining efficiency and machining accuracy greatly. View full abstract»

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  • Temperature-gradient transient liquid phase bonding under low pressure

    Publication Year: 2006 , Page(s): 32 - 34
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (3490 KB)  

    Temperature gradient transient liquid phase bonding (TG-TLP bonding) of 45MnMoB steel was carried out under low pressure using an iron base interlayer. The maximum deformation caused by the pressure was 1%. The bond microstructure was analyzed using EPMA, SEM and EDS, and the effects of pressure and temperature gradient on the bond interface morphologies and strength were also studied. The results show that applying low pressure during TG-TLP bonding can result in an “ideal joint” in 3 minutes, which is free of bond interface and identical in composition to that of base metal. Some insoluble oxide particles are observed in the bond made with a 5 °C/cm temperature gradient, and tensile strength of the bond is 75% of that of the base metal. Few oxide particles and impurities are found in the bond made with a 50 °C/cm temperature gradient, and the bond fails in the base metal. Compared with planar interface made by conventional TLP bonding and non-planar interface made by TG-TLP bonding, TG-TLP bonding under low pressure can produce a homogeneous joint free of interface, and the bond strength is equivalent to that of the base metal. View full abstract»

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  • Ultrasonic-electrodeposited nano Ni-AlN composite layers and characterization

    Publication Year: 2006 , Page(s): 35 - 38
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (3397 KB)  

    Nanometer Ni-AlN composite layers were prepared by ultrasonic-electrodeposited technology. The optimum technological parameters of nanometer Ni-AlN composite layers were obtained by experiments and analysis. We observed surface morphology and metallurgical structure of composite layers with scanning electron microscope (SEM) and high respective transmission electron microscope (HRTEM). The test results showed that the nanometer Ni-AlN composite layers prepared by proper ultrasonic-electrodeposited technology have better wear resistance and corrosion resistance. And the composite layers consist of AlN particles and nickel grains both nanometer-sized. View full abstract»

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  • Experimentation and numerical simulation of the manufacture of an ellipsoidal workpiece by multi-point sandwich forming

    Publication Year: 2006 , Page(s): 39 - 43
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (6907 KB)  

    To significantly reduce the time and cost of tooling development for sheet metal parts, a new reconfigurable die forming, the multi-point sandwich forming (MPSF) is being developed for parts with various curvatures, in small batch quantities. In this process, the die surface can be changed by adjusting the height of the pins in the lower die. Some elastic polyurethane pads are used as an upper die. To enable parts of good surface quality to be formed, an elastic interpolator and die sheet also are used in the process. The arrangement of each component of the tool set has a sandwich like structure, and therefore this process is called multi-point sandwich forming. To investigate this process, in the work described in this paper the die with ellipsoidal surface was chosen to manufacture workpieces in this paper. The effect of the thickness of interpolator on the height of workpiece dimples and forming errors along two typical sections of workpiece was investigated through experiment and the commercial FE simulation software ABAQUS was used to investigate the loading process and springback after unloading. Simulation enabled an explanation to be obtained as to why dimples occur in the middle edges of a workpiece. Also the final shape of the workpiece calculated by FE simulation was in good agreement with the experiment of result. View full abstract»

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  • Research of the method for the order planning of the iron-steel factory based on the MTO management architecture

    Publication Year: 2006 , Page(s): 44 - 49
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1424 KB)  

    Analyzing the common grounds and the different aspects between the iron-steel industry and the mechanical manufacture industry, this paper constructs the architecture of MTO planning management system for the iron-steel factory, combining the market’s demand with the specialties of the iron-steel industry. Supported by this architecture, this paper analyzes the technologic characters of the steel manufacture and presents the mathematics models and solution strategy for order planning. Regarding the five-day as the least time unit and minimizing the earliness-tardiness penalties as the goal, an integer programming models for the order planning is created. The genetic algorithm based on the repeatable natural number coding and 3-mutation operator is used as the solution strategy. The search methods include the interior-point method (IPM) and the outer-point method (OPM). This hybrid search method ensures the global property of searching. At last, the order planning of a famous factory is used as the instance in the experimentation and the model parameters are analyzed. The numerical analysis shows that the model comes up to the production process, the solutions obtained by this algorithm are superior to those obtain by the human-machine system. So, the model and algorithm are valid View full abstract»

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  • Statistical analysis of resonance frequency error for ultrasonic welding machine transducer

    Publication Year: 2006 , Page(s): 50 - 55
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (3092 KB)  

    Ultrasonic welding technology, a high efficiency and energy saving technology, has been widely used in industry. Piezoelectric transducer is the key component in ultrasonic welding machine, and the resonance frequency is the most important parameter of the piezotransducer. However, there are some fluctuations for the resonance frequencies of mass production piezotransducers because many factors influence, such as the microstructures of piezoelectric material and metal material changing, the size and the distribution of material grains being not uniform, machining error, assembling error, and stress being not uniform and so on. These fluctuations could cause it difficult for ultrasonic generator to matching, and influence on acoustic impedance and the output acoustic power. In this paper, the author carries out statistical analysis for the resonance frequencies and obtains the histogram of the resonance frequencies by data analysis method after testing the resonance frequencies of a group of mass production piezotransducers. According to the histogram the distribution curve of the resonance frequency can be fitted, and this curve shows the distribution of the resonance frequency is close to Normal distribution. Following, this paper discusses influence rules of the pressure and the surface roughness, and the constant-torque assembly method based on PC control is presented. Finally the author suggests the numerical control modifying method for piezotransducer and ultrasonic horn can be used. The paper has certain directive significance to the piezotransducer design, the mass production of ultrasonic welding machine and acoustic system matching. View full abstract»

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  • A pear-to-pear collaborative product design platform for dispersed network manufacturing

    Publication Year: 2006 , Page(s): 56 - 61
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (8101 KB)  

    The network technology is changing our working and living greatly. Many multi-national companies cooperate in geographically different locations. They need to communicate and work concurrently on large amount of complex product data with their factories, sub-contractors as well as suppliers across the border. The use of e-mail and fax are far from satisfactory as they are time consuming and ineffective. In this paper, a pear-to-pear collaborative product design platform (CPDP) is proposed which enables authorised users in geographically different locations to cooperate and share private resources, such as collaborative design product drawing files, sharing personal knowledge or data. The system is web-based, there is no need for the users to install any utility software at their ends since the cooperation is based thin client technology and a pear-to-pear screen sharing technique. This results in substantial saving in the cost and the product development time in a network environment. View full abstract»

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  • Jaw plate kinematical analysis for single toggle jaw crusher design

    Publication Year: 2006 , Page(s): 62 - 66
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2529 KB)  

    Jaw crusher is a kind of size reduction machine which is widely used in the mining and aggregates industry. The interaction between jaw plates and material particles brings the inevitable and serious wear to the jaw plates during the jaw crusher operation, which not only decreases the efficiency, but also increases the cost and the energy consumption of the jaw crusher. The movement of the moving jaw is described in detail. The breakage force is tested in the experiment and some information on the particles flow is gained by analyzing the force distribution. Based on the movement analysis of the moving jaw and the crushing force distribution analysis, the jaw plates wear is analyzed on a macroscopic level. The result of the wear analysis can explain some of the phenomenon in practice. With the rock material breakage character taken into consideration, the blindness brought by the traditional empirical designing can be greatly decreased. It is helpful to design the crusher for improved performance. View full abstract»

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  • A multi-agent ant colony optimization algorithm for earliness/tardiness scheduling with different due window on non-uniform parallel machines

    Publication Year: 2006 , Page(s): 67 - 71
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1171 KB)  

    Earliness/tardiness job-shop scheduling problems, which play very important roles in the field of job-shop scheduling, are NP (non-polynomial) hard typically, and classical methods for solving them usually result in exponential computational complexities. On the other hand, most of former scholars paid more attention to earliness/tardiness problems with common due window on single machine. More generally, to solve the earliness/tardiness job-shop scheduling problems with distinct due window on Non-uniform machines, a novel algorithm named MAACO (multi-agent ant colony optimization), which is more efficient and effective than classical methods, is presented in this paper, and a detailed mathematical model for the problem above is proposed. The presented algorithm introduces competition-cooperation and self-study mechanism into behaviours of agent ants, which improves the convergence rate and optimization precision of ant colony optimization (ACO) greatly. Simulation experiments of the problem are made at different scales. The results show that MAACO is very efficient and effective in obtaining near-optimal solutions to the earliness/tardiness job-shop scheduling problems, especially when the scale of problems is very large. View full abstract»

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  • Effects of electron beam local heat treatment on fatigue properties for Ti-6Al-4V alloy joints

    Publication Year: 2006 , Page(s): 72 - 75
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2480 KB)  

    Ti-6Al-4V alloy plates after electron beam welding(EBW) were heat treated by electron beam local heat treatment(EBLHT), the joints specimens were tested by low cycle fatigue tests, and the influence of EBLHT on fatigue properties was studied. Experimental results have shown that the joints of Ti-6Al-4V alloy after EBW and EBLHT present soften during fatigue tests, and elasticity strains are higher than plastic strains. The fatigue life of the joints after EBLHT can increase 30%, and the equations of ε—N curve are gained. Therefore electron beam local heat treatment can improve the properties of EBW joint, especial for complex aero-components. View full abstract»

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  • Development of network control system based on rapid prototyping instrument

    Publication Year: 2006 , Page(s): 76 - 79
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2652 KB)  

    Traditional remote control systems require designers to use the serial interface or the bus as tools to control instruments. These ways lead to complicated circuit connection and unreliability of hardware. It is therefore imperative to have good methods to explore a more suitable design choice, which can avoid the problems mentioned above as more as possible. This paper presents a GPRS network control system based on rapid prototyping instrument in VC++ 6.0. It also provides high-level modelling, programming methods and running results for this system in terms of software and hardware. More specifically, this system takes advantage of remote control technology, GPRS network technology and advanced manufacturing technology. Wireless communication and control are accomplished timely and accurately between the remote control centre and a number of controlled instruments by use of Winsock control in GPRS network. This system also can manage the historical data by using database. Furthermore, it has such advantages as low cost and easy to maintain and promote. View full abstract»

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  • Optimization on maintenance cycle for power plant equipment based on probabilistic risk assessment

    Publication Year: 2006 , Page(s): 80 - 84
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1011 KB)  

    Selection of a rational maintenance cycle is one of the main tasks to implement condition-based maintenance for power plant equipment, which can be achieved from reliability-centred maintenance (RCM) logical decision method. In this paper, a probabilistic risk assessment (PRA) technology is applied to RCM analysis on power plant equipment. The minimum maintenance risk cost is taken for an optimized objective to solve the optimum maintenance cycle. A method to calculate the maintenance risk cost through PRA technology is proposed after the technological process to determine the optimum maintenance cycle for power plant equipment is defined. The relationship between fault rate and maintenance activities including condition monitoring and preventive maintenance is comprehensively analyzed. Then an optimum model of maintenance risk cost is set up, and an overall maintenance strategy with optimum maintenance cycle is obtained through genetic algorithm (GA). Finally, the feed pump set of one 200MW turbine is regarded as an example of application for verification, and satisfactory results are got. As a result, the total maintenance cost based on the maintenance cycles through GA will be reduced greatly in comparison with the traditional approach. View full abstract»

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