bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Automatic Measuring System on Stone Milling Force
Authors: Qi Feng Lian , Sun Zhi Li , Zhao Min
Published: October 2009

The automatic measuring system of stone milling force is studied in the article. The columned diamond milling cutters are used to mill stone on NC milling machines. Through analyzing the milling force, the mathematic model is established. Combining the measuring force index, the experimental facility of the automatic measuring system is established and solving methods of the key problems on the software data acquisition is detailed. The system is utilized to measure three component force of milling, that is, horizontal force, vertical force and axial force. Reliable data is acquired. Finally the automatic acquisition of data and the drawing of curve are realized. The achievement of automatic measurement of stone milling force provides theory basis for the further research on the wearing characteristics of diamond cutters, cutting quality of stones and the optimizing of processing technological parameter etc.
Design and Implementation of a Data Processing and Visualization System for STEP-NC Programs
Authors: Liu Ri Liang , Zhang Xian Zhi , Zhang Cheng Rui
Published: October 2009

Over the last decade a new data interface for CAM/CNC integration has been established to replace ISO 6983. The new standard, ISO 14649 (STEP-NC), provides a comprehensive data model that describes both geometrical and technological information in an object-oriented way. In order to bridge the gap between such rich-information programs and the legacy CNC systems, this paper presents a framework for manipulating the manufacturing data in STEP-NC part programs. The proposed system provides a basic platform for STEP-NC program interpretation, geometry visualization, micro-process planning and program re-generation. Major issues relating to the realization of manufacturing information extraction and shop-floor-level process planning are addressed in particular, and a prototype for STEP-NC turning process is implemented to demonstrate the feasibility of the approach.
An Improved Representation for Object Tracking Algorithm
Authors: Gu Yu Ming , Liu Jie , Liu Kuo , Yao Zhao
Published: October 2009

Aiming at the shortcoming of feature space representation in traditional mean shift, we propose an improved object tracking method. At first, the target model region is segmented into overlapped square, and their histograms are computed. Then, the feature space is constituted which has introduced spatial information into. So the accuracy is enhanced. After computing the feature space of target candidate region, the mean shift is employed to find the new target location. The result shows that the improved method can track the object more robust, accurately and quickly.
Dynamic Simulation of the Drill Grinder Based on the Tripod Parallel Universal Wrist
Authors: Wu Guang Lei , Zou Ping , Yi Xue Fei
Published: October 2009

A new type of 5-DOF drill grinder based on the tripod parallel universal wrist is introduced. Due to the simple mechanical structure comparing the grinder with the existing conventional CNC machine tools, it should be easy for the PKM to manufacture at a low cost. Aiming to solve the problems of selection of driving motor parameters for this series-parallel hybrid drill grinder, the three-dimensional entity model of this machine tool is established by means of UG software, and then the assembly model is introduced into ADAMS/View. The dynamic simulation is conducted and the driving forces of all driving links are found. The dynamic properties of the drill grinder are thus obtained, which provided an important reference to the selection of motor.
Query Processing of RFID Data with Object Trajectory in Manufacture and Logistics
Authors: Wei Sun , Dong Li Hua , Dong Yao Hua
Published: October 2009

In the domain of manufacture and logistics, Radio Frequency Identification (RFID) holds the promise of real-time identifying, locating, tracking and monitoring physical objects without line of sight due to an enhanced efficiency, accuracy, and preciseness of object identification, and can be used for a wide range of pervasive computing applications. To achieve these goals, RFID data has to be collected, filtered, and transformed into semantic application data. However, the amount of RFID data is huge. Therefore, it requires much time to extract valuable information from RFID data for object tracing. This paper specifically explores options for modeling and utilizing RFID data set by XML-encoding for tracking queries and path oriented queries. We then propose a method which translates the queries to SQL queries. Based on the XML-encoding scheme, we devise a storage scheme to process tracking queries and path oriented queries efficiently. Finally, we realize the method by programming in a software system for manufacture and logistics laboratory. The system shows that our approach can process the tracing or path queries efficiently.
Two-Echelon Supply Chain Coordination with Vendor Managed Inventory
Authors: Ren Jin Yu , Liu Yong Xian , Hao Yong Ping
Published: October 2009

Coordination between buyer and supplier is an important way to lower supply chain cost and gain competitive advantage. This paper focuses on buyer-vendor coordination models within a vendor managed inventory setting, and sets up the coordination mechanism that allows supply chain to achieve the optimal overall performance and both parties in the supply chain to achieve profit sharing. Finally, simulation analysis is given.
Monitoring of Drill Wear State Using Wavelet Packet Decomposition (WPD) and Welch Spectrum
Authors: Yang Xu , Kumehara Hiroyuki , Zhang Wei
Published: October 2009

This paper presents a method for drill wear state monitoring based on recognizing the cutting torque signals. It consists of two steps: firstly, decompose cutting torque components from the original signals by Wavelet Packet Decomposition (WPD); secondly, extracting wavelet coefficients of different wear states (i.e., slight, normal, or severe wear) with signal features adapting to Welch spectrum. The experiments on different tool wears of the multivariable features the results of Monitoring are significant and effective.
Analysis Model for Energy Consumption in Manufacturing Enterprises Based on Input-Output Theory and its Applications
Authors: Li Cai Zhen , Liu Fei , Li Cong Bo , Wang Qiu Lian
Published: October 2009

Analysis of energy consumption which could explore energy saving potential is of important significance for energy saving in manufacturing enterprises. An analysis model including physical and monetary input-output models for energy consumption in manufacturing enterprises based on input-output theory is constructed. Physical and monetary energy consumption coefficient matrices are obtained from the analysis model. Then, some application ideas are proposed, including vertical and horizontal comparison of coefficient matrices elements of a manufacturing enterprise in per unit time, comparison of coefficient matrices elements of a manufacturing enterprise in different unit times, comparison of coefficient matrices elements of manufacturing enterprises within the same industry in per unit time, effect analysis of energy price change to energy consumption of a manufacturing enterprise. Finally, a case study of a heavy-machinery manufacturing enterprises validates its practicability.
Analysis and Estimation of Processes Capacity Based on Quality Control
Authors: Li Hu , Wu Wen Zheng , Wang Wan Shan
Published: October 2009

Under the conditions of the mode of production drifting towards extensive collaboration mode, the process capacity oriented to machining factory should be analyzed and estimated, which is the essential precondition for factory to decide whether to accept a piece of manufacturing order form. Based on the situation, with the production quality checking and analysis focused, a kind of process capacity analysis and estimation was brought forward for the collaborational machining factory under the mode of quality control. The model based on quality driven for the process capacity estimation was provided to solve the critical problem. And the network service system of process capacity estimation was established, by making full use of quality function analysis (QFD), similar procedure query and rough set theory combined with the character parameters such as work-part size tolerance, surface roughness, manufacturing time, cost and etc. Furthermore, some key enabling technologies were instigated in detail, including quality control technology oriented low volume customization and process capacity analysis technology based on rough set (RS) theory.
Virtual Force Field Integrated with Human Avoiding Obstacles Strategies for Robot
Authors: Jin Ying Lian , Wang Bin Rui
Published: October 2009

Humanoid strategies of avoiding obstacles were analyzed and formulated into virtual force field (VFF) algorithm. In view of obstacles moving, smoothing accumulation computing method was designed for updating credibility factors (CF) of grid held by obstacle, and two examples were given. Uncertainty reasoning was adopted for computing complex CF with uncertainty of sensors signal, and synthesize method was designed. The weight of repulsive force was designed to be varying with angle from robot moving direction to obstacles, in order to make robot more sensitivity to obstacles on moving way. Indoor and outdoor virtual environment were established and simulations were carried out. The results demonstrate that the path is better using proposed than common VFF.
An Outsourcing E-Maintenance System for Improving Maintenance of an Industrial Product Service System
Authors: Zhu Qi Qi , Jiang Ping Yu
Published: October 2009

To improve maintenance of industrial product service systems, an outsourcing e-maintenance system (OEMS) based on active technical maintenance provision of the product manufacturer/vender or service supplier is presented, and then a framework for enabling the OEMS is proposed. The framework includes three layers, that is, development layer, function layer and application layer. The key information and communication technologies (ICTs) for developing the framework are introduced in detail. In addition, an OEMS prototype is developed for illustrating the proposed framework.
Dynamics of Multi-Disk Rotor System with Rub-Impact Fault
Authors: Dai Ji Shuang , Ma Hui , Wang Xue Jun , Wen Bang Chun
Published: October 2009

In this paper, a multi-disk rotor system is studied. The rotor system is properly simplified and the finite element model is established. Assuming that contact region is an arc when the practical rotor-stator rub-impact fault occurs. Contact analysis and nonlinear finite element method are adopted to carry out numerical simulation of rub-impact. The results show that 1/2 fractional frequency components appear in slight rub-impact stage; 1/3 fractional frequency components appear in moderate rub-impact stage and 1/4 fractional frequency components appear in serious rub-impact stage. The research results will provide theoretical support for fault diagnosis of rub-impact.
Plant Refurbishment Options Based on the Life Cycle Assessment
Authors: Tomlinson Stuart , Wang Chang J. , Morgan Colin
Published: October 2009

This paper provides an analysis of the carbon emissions of materials used by a water company in the refurbishment of mechanical and electrical equipment at its pumping station. A tool for attaining life cycle calculations for embodied carbon, which can be applied in similar applications, is developed. Due to uncertainties in the derivation of numerical data and other related information, such as sources of raw materials, the embodied carbon emissions are calculated and analyzed using material emission factors using the Life Cycle Assessment method. This work may be used as a template for organizations requiring estimates of embodied carbon in materials and plant, for example, as a precursor to a major refurbishment project.
Study on Kinematical Characteristics of 2PTT-TPT Parallel Machine Tool Based on Virtual Prototype
Authors: Li Xing Shan , Wang Jun , Cai Guang Qi
Published: October 2009

This paper proposes a new 2PTT-TPT parallel machine tool, solves the kinematics equation and analyzes the actuating force and maneuverability. In order to simulate the movement trajectory and pose, the model of virtual prototype is built in Solidworks and visualNastran. As a result, the mechanism is featured by compact construction, no singularity and good maneuverability, which provides the theoretical foundation for the design of parallel machine tool.
Numerical Design and Analysis of a Certain White Bodywork
Authors: Yang Ying , Li Yu Sheng , Meng Fan Liang
Published: October 2009

Develops a finite element model to analyze the dynamic/static sensitivities of a certain white bodywork, i.e., the sensitivities of its bodywork’s natural frequency, torsional stiffness and flexural rigidity and mass to the thickness of sheet to make the bodywork, thus finding out the main parts affecting greatly the dynamic and static characteristics of bodywork to optimize its structure design. According to the sizes of contribution the body mass will make to the natural frequency and torsional stiffness and flexural rigidity, an optimal conceptual design is given. This method provides an important reference for improving the dynamic performance of bodywork, lightening its weight and optimizing its design.
Research on Sketch Contour Generation in Reverse Engineering
Authors: Ye Tie Li , An Lu Ling , Gao Li , Wu Min
Published: October 2009

The key technologies for generating sketch contours are researched on which the features such as extrusion, revolution and sweeping are reconstructed. First the planar data points are arranged in sequence by improved least distance arrangement algorithm. The feature points are extracted in terms of estimated curvatures and their changes. The types of feature points are identified by use of Adaptive K-Curvature Function. The types of planar curves are judged by Projective Height Function. On basis of feature point treatment the dividing points to segment curves are determined, which provides the foundation for constraint-based reconstruction of sketch contours in reverse engineering.
Modeling and Simulation of Implant-Supported Fixed Partial Dentures Prosthodontic
Authors: Liu Dong Lei , Yan Hua , Shen Zong Bao , Song Xin Hua , Wang Xiao
Published: October 2009

The theoretical models and finite element models of implant-supported fixed partial dentures and surrounding osseous tissues were founded. It was studied of the influence of connector sectional area on implant-supported fixed partial dentures and surrounding osseous tissues. The results indicate that increasing the connector sectional areas to some extent has positive effect on fixed bridge itself. But the maximum stresses in some regions of surrounding osseous tissues increase as the connector sectional areas increase, the change extent is smaller comparatively. The study provides biomechanics evidence for the optimum design of implant-supported fixed partial dentures.
Research of the Semicircle Trench Belt Conveyer
Authors: Deng Yong Sheng , Xiao Cheng Yong , Shi Ning
Published: October 2009

In order to prove that the semicircle trench belt conveyer can achieve the transportation of the great inclination angle, the semicircle trench belt conveyer's basic design principles were proposed by analyzing its working principle. What’s more, on the basis of the analysis, the reasonable supporting roller group scheme of arrangement was presented. And through the comparison between the semicircle trench belt conveyer and other forms of belt conveyer, the characteristics of the semicircle trench belt conveyer were summarized. This kind of belt conveyer has a wide application prospect.
Pipeline Design and Layout in Virtual Environment
Authors: Zhang Xiao Gui , Gao Bo
Published: October 2009

Due to the difficulty of pipeline design and layout for complex mechanical products, a virtual reality-based method is proposed for pipeline design and routing in virtual environment. A parameter database is established for geometric design of pipelines according to their basic parameters in 3D models. Controlled-points and controlled-vectors are introduced to determine the position and direction of pipelines. Dynamic adjusting algorithm for straight pipelines and elbow pipelines in virtual environment are implemented respectively to joint and layout pipelines according to surrounding environment and features. A pipeline oriented virtual assembly environment system is developed, and some examples are given to demonstrate its function and validation.
The Model Analysis of Molding Sand’s Removal and Mechanism Research Using High Pressure Water-Jet Technique
Authors: Gao Ji , Zhang Rui , Cao Guo Qiang , Zhang Gui Mu
Published: October 2009

This paper studies the mechanism and process simulation of removal of molding sand by a high pressure water jet using a nonlinear dynamic damage model and finite element analysis (FEA). The results indicate that a high pressure water jet possesses a strong ability to remove molding sand. The destruction of molding sand is a concurrent result of stress wave and quasi-static pressure, in which the alterative stress wave plays a major role. The numerical results agree with the test results, indicating that the model and FEA are feasible for analyzing the mechanism and process of removal of molding sand by a high pressure water jet. These conclusions can be used for equipment design and process optimization of removal of molding sand for precision castings.
Mechanisms for Sawing of Refractory Bricks with Diamond Blades
Authors: Yu Yi Qing , Li Yuan , Xu Xi Peng
Published: October 2009

Experimental studies were undertaken to investigate the mechanisms for circular sawing of refractory bricks with diamond segmented saw blades. Three kinds of diamond segments of different hardness were fabricated for the saw blades. The vertical and horizontal force components and the spindle power were measured in sawing. Based on the measurements of force and power, the specific energy and the normal force per diamond grit were obtained. The normal force per grit in the sawing of refractory bricks was found to be only 5% of the static compressive strength of diamonds used in the present study, but fractures of diamonds were still popular on the segment working surfaces after sawing. The power, horizontal force, and the specific energy were found to increase with segment hardness. The specific energy obtained from the measured power was basically comparable to the values obtained from a theoretical equation to calculate the specific energy associated with slurry erosion to the bond matrix of segments.
The CAE Analysis of Fork Truck Frame System Based on ADAMS and ANSYS
Authors: Zeng Hong , Li Tie Jun , Gao Qi , Liu Shu Fen
Published: October 2009

In this paper, all work are on the basic of fork truck frame system pivot-jointed optimization design job. 3D solid model of fork truck frame system was built by using Pro/E software based on optimized data, which was guided into ADAMS and the fork truck frame system virtual prototype model was generated, dynamics simulation about working process of truck’s frame was proceeded, load and displacement curve of major component were obtained. FEM analysis was done under ANSYS, the above dynamic analysis data were taken as boundary condition, thus completing the CAE analysis of fork truck frame system.
Application of Diamond Tools on Finish Turning Al-Si Alloy
Authors: Liu Dong , Yan Hong Juan , Xu Hong Hai , Luo Xue Ke , Xu Qian
Published: October 2009

Silicon–aluminum alloys (Al-Si), with Si contents up to 12% are important materials in automotive and aeronautical industries due to their low density and high wear resistance. The cutting force, surface roughness and tool wear of diamond tools and cemented carbides tool were compared when turning Al-Si alloy. The results indicated that there wasn't remarkable difference between diamond tools and cemented carbides tool in cutting force and surface roughness when rough turning silicon-aluminum alloy. While in finish turning, less cutting force and surface roughness can be obtained when using diamond tools. The flank wears of diamond tools were less than cemented carbides. It was concluded that diamond tools can improve machining characteristics and reduce tool wear.
Research on the Properties of Coaxality Error Objective Function
Authors: Liu Ping , Liu San Yang
Published: October 2009

The unconstrained optimization model applying to radial deviation measurement is established for assessing coaxality errors by the positioned minimum zone method. The properties of the objective function in the optimization model are thoroughly researched. On the basis of the modern theory of convex functions, it is strictly proved that the objective function is a continuous and non-differentiable and convex function defined on the four-dimensional Euclidean space R4. Therefore, the global minimal value of the objective function is unique and any of its minimal point must be its global minimal point. Thus, any existing optimization algorithm, as long as it is convergent, can be used to solve the objective function to get the wanted values of coaxality errors by the positioned minimum zone assessment. An example is given to verify the theoretical results presented.
Generation and Suppression of Weld Joint Offset for Tailor-Welded Blank in Multi-Point Forming
Authors: Liu Wei , Wang Xiao Guang , Li Ming Zhe
Published: October 2009

Multi-point forming (MPF) is a flexible manufacturing technique, which is made up of a set of adjustable base elements controlled by MPF-CAD/CAM software. It uses discrete punches to express a continuous 3-D surface, by which the work piece’s surface under manufacturing is formed. In this paper, to investigate the feasibility of the multi-point forming for the tailor-welded blank ( TWB ), the explicit finite element model for TWB in MPF is established, then spherical surface TWB is selected as an example to analyse reason for generation of weld joint offset defect, and finally method to suppress generation of defect is proposed. The results show that in MPF for spherical surface part, weld joint removes to thick blank direction in zone of expanding and suspending, but to think blank in zone of blank holder; weld joint offset can be controlled effectively by adopting stepped blank holder and applying proper blank holder force .
Research on Workpiece Machining Precision PID Control Model in Closed-Loop Manufacturing Systems
Authors: Lu Jun , Huang Yu Mei , Liu Yang , Li Wen Wen , Zhong Hua
Published: October 2009

In this article, a new concept named ‘Closed-loop Manufacturing System’ (CLMS) is introduced. The Workpiece Machining Precision PID Control Model (WMPPCM) is proposed and described. PID error compensation model expressions are structured. The experimental method of WMPPCM is established. In the experiment, WMPPCM could be utilized to estimate the trend of machining error so as to conduct the adjustment before production. The experiment has verified the feasibility and validity of WMPPCM. The experiments have also proved that WMPPCM can decrease machining error more effectively then traditional CNC machining method.
Research on Dynamic Characteristics of Electro-Mechanical Control Type CVT
Authors: Jiang Qiang , Liu Hong Yi , Cheng Nai Shi , Hao Jian Jun
Published: October 2009

Based on development project of electro-mechanical control type continuously variable transmission, this paper has done the following works: First of all, the structure and working principle of EM-CVT is studied; then, mathematical model was established; finally, via numerical simulation, Performance Parameters of transmission system, such as mechanical characteristics, dynamic performance of execution system are mastered in the transmission process of EM-CVT. Analysis of the study will contribute to the development of high-quality and highly efficient controller for EM-CVT.
Virtual Design of Controlled Five-Bar Mechanism
Authors: Ma Zhi Yan , Liu Huai Guang , Chen You Ping
Published: October 2009

Controlled five-bar is an important area of contemporary mechanism. On account of the current gap in design software about five-bar, a controlled five-bar design platform (CFDP) has been developed with VC++ and OpenGL based on the theory of five-bar. The platform has two main functions of motion analysis and path synthesis, therefore offers a great convenience for the designers. This paper introduces the method of path synthesis and motion analysis, and then the functions and structures of the platform are discussed. Conclusion gives the overall attitudes on the software.
Technological Study on the 3D Collaborative Design System Oriented Project Management
Authors: Qu Li Gang , Wu Da Wei , Ding Jun Mei
Published: October 2009

The concept and content of project management in the networked collaborative design system is presented according to the mechanical product design typical process and its state-of-the-art requirement. The key technologies of the collaborative project management are studied mainly, the Fuzzy Analytic Hierarchy Process (F-AHP) algorithm is employed to select collaborative partners, the method of Design Structure Matrix (DSM) is put forward in process of decomposing and assigning design tasks, and the weight-coefficient recursively statistic algorithm is used in controlling task schedule. The implementing technologies of the 3D networked collaborative design system oriented project management are researched simultaneously, such as collaborative data communication, conversation tool and design tool. The archetypal system platform was developed, it's proved that the 3D collaborative design system is qualified for complex mechanical product collaborative design by synergic team.
The Fitting Formula of Outflow Coefficient for the V-Cone Flow Meter Based on FLUENT
Authors: Sun De Zhi , Chen Xiao Ying , Liu Wei Li
Published: October 2009

The V-cone flow meter is widely used to measure gas, liquid and high temperature steam in current industrial production. By applying the FLUENT software of CFD, a three-dimensional model about the V-cone flow meter is built. The effect of technical parameters on flow in the V-cone flow meter field has been studied by using computational fluid dynamics (CFD). The data fitting for empirical formula of the outflow coefficient was completed by using MATLAB software to provide some basis for the further production and exploration. The simulation outflow coefficient is relevant to the parameter of the effective diameter ratio , the diameter of pipe D, front-cone angle and back-cone angle .
The Research of Big Internal Cooled Backup Roll with Numbers of Sleeves Assembled Together
Authors: Sun Deng Yue , Wei Zhi He , Zhou Hui Feng , Xu Shi Min
Published: October 2009

The backup roll of the strip rolling mill is a key component of the steel rolling production line, so the research to reduce the consumption of it has become an important issue. The roll can’t achieve the technology requirements because of the repeatedly abrasion and regrinding. At present, weld repaisleeve is the mainly solution, but it is not very satisfaction as the complex technologies and plenty of equipments. In this paper, a kind of big internal cooled backup roll with numbers of sleeves assembled together was brought up. The roll core can be reused. Numbers of sleeves assembled together can reduce the height compare with a single one; it can be mass produced by sleeve rolling machine. Therefore it can significantly reduce the costs of production.
Reliability Design of Double Circular-Arc Cylindrical Gear Transmission
Authors: Sun Shi Xia , Sun Zhi Li , Yan Ming , Li Xiao Dong , Bai Ping
Published: October 2009

According to the standard GB/T13799-92 of People’s Republic of China, the reliability design for the double circular-arc cylindrical gear transmission is completed by applying limit state theory. Weibull distribution is used to describe random factors in the design. A computer applied program is developed based on VC++ platform to achieve the computer-aided reliability design of circular-arc gear, and get the reliability information of the designed gear quickly and accurately.
Study on Misalignment of Focus Position in Laser Metal Deposition Shaping Processing
Authors: Tian Feng Jie , Liu Wei Jun , Shang Xiao Feng , Yang Guang
Published: October 2009

In order to investigate the effect on manufacturing quality of focus position misalignment between laser beam and powder convergence in laser metal deposition shaping (LMDS) processing, several experiments including single-track monolayer, straight thin-wall and ring thin-wall were made. The measurements and analysis on shape, size and surface quality of the experiment parts were carried out. An omnidirectional detecting method to check the misalignment of focus position was brought forward and tested. The results indicate that the misalignment of focus position directly affects the quality of shaping parts and shows the regularity, the detecting method can easily detect the focus position misalignment on random direction and angle and guide the adjustment on them.
A Two-Phase New Product Introduction Model
Authors: Xu Hong Xue , Wan Fu Cai , Guo Xiu Ying , Liu Yong Xian
Published: October 2009

A new approach that combines neural network and 0-1 programming was proposed. Based on the lifecycle analysis, the characteristics of new products can be divided into four categories with different benefit curves and parameters. A neural network is used to classify the new product and the 0-1 programming model is then developed and used to determine what products to be introduced into marketplace. Numerical example is given finally to show that this model is effective for firms.
Target Locating Technology and System Exploitation Based on the GPS Technology
Authors: Yang Xiu Min , Zhang Shu , Wang Juan
Published: October 2009

Further research on the target locating technology and system exploitation based on the GPS technology is made in this paper, and the locating model based on the GPS technology and the orientation terminal posture gaining model as well as its algorithm based on digital compass are established. On this basis, this paper puts forward a solution to the target locating measurement and controlling system based on GPS and digital compass. The system adopts the structure of the host computer and the client computer: the client computer is the hardware realization of target locating system and also can be operated separately; the host computer monitors the client computer remotely. The system can directly get posture information, with advantages of simple structure, upstanding stability, low price and so on, and can satisfy the function of locating system. The client computer passed through the high and low temperature test, resistance vibration test, electromagnetic compatibility test and so on. In the functional testing, the automatic alignment precision of the system attains to and manual alignment precision attains to , completely match the practical requirements.
Numerical Simulation of Whole Impeller for 5-Axis Machining Based on UG
Authors: Yuan Feng
Published: October 2009

The manufacturing template of whole impeller 5-axis machining based on UG was re-developed with NURBS interpolation principle and UG/knowledge fusion technology, and 5-axis NC machine and part model were established, each parts of machine were simulated in 3D motion with reading NC code. Human-computer interaction was processed fast with the template and guiding of digitized manufacturing, the cutting tracks of half-finishing machining and finishing machining for whole impeller were produced fast. The template involves 3-D modeling, craft flow programming of NC machining, program of NC machining and etc. and is tested on 5-axis NC machine, it is indicated that the scheme and program of NC machining for whole impeller is feasible.
Finite Element Analysis of the Forging Process for Half-Shaft Bushing
Authors: Zhu Chun Dong , Zhang Man Chun , Hua Lin
Published: October 2009

As an important forged part of an automobile, the inner hole of the half-shaft bushing must be formed directly. However, the process requires many steps, and how the forging, or deformation, is spread over the production steps directly affects the die life and forging force required. In this paper, the three steps involved in directly forging a half shaft bushing's inner hole are simulated using the two-dimensional finite element method. Further more, we improve the forging process. From numerical calculation, the improved necessary forging force is found to be only half the original force, and the die life is doubled.
Study on Virtual Simulation Machining of Double Circular Arc Profile Spiral Bevel Gear
Authors: Zhang Rui Liang , Lv Ming , Wang Tie , Li Hong Yuan
Published: October 2009

Following spatial mesh principle, the gear cutting meshing equation was established in the paper through analyzing the relation between the machining principle of the double circular arc profile spiral bevel gear and the movement of the machine tool. The parameters of cutter head and the machine tool’s movement were then obtained through the equation. VERICUT was applied to build the three-dimensional virtual simulation machining model by which the gear geometry parameters, cutter parameters and machining tool movement parameters were calculated for a given gear to be processed and virtual simulation machining proceeded to prove the validity of the model.
Wear Rate Prediction and Analysis of Metal-Matrix of Ni-Based Super Alloy onto Cast Iron by Laser Cladding
Authors: Zhang Yun Feng , Sun Zhi Li
Published: October 2009

Metal- matrix composites layers were prepared by laser cladding with Ni-based Super-alloy onto CrMo cast iron. Applying uniform experiment design, under conditions of different velocity and load ,the wear tests of alloy layers were carried out and the stepwise regression method are used to establish the wear rate model for prediction of wear rate. It is proved that the modal is significant and represents the character of the wear trend. According to the wear rate model ,the wear characteristics are analysed and the wear mechanisms are identified. The main wear mechanism of laser cladding layer are delamination, adhesive wear and abrasive wear.
Study on Fractal Characteristic of Surface Micro-Topography of Micro-WEDM
Authors: Ding Hai Juan , Guo Li Bin , Zhang Zhi Hang , Cui Hai
Published: October 2009

The surface micro-topography of micro-WEDM is random, disordered and multi-scale and has been proved that it is fractal with the characteristic of self-affinity within a certain scale on the basic of the fractal geometry theory. According to the characterization of W-M fractal function, the principles of three evaluation methods about power spectrum method, structure function method and wavelet criterion have been described. The advantages and disadvantages of them evaluating the fractal property of the surface micro-topography of micro-WEDM have been compared in this paper. The experimental results indicate that the wavelet criterion is more stable and dependable than the other two methods, so the fractal dimension D of the surface micro-topography of micro-WEDM has been calculated using it. The result shows that the fractal dimension has the tendency of decrease with the increase of root mean square deviation (Sq) value while it is not absolutely monotonic, which can be used as a beneficial supplement to traditional evaluation parameters of surface roughness.
Simulation and Experiment Study for Spindle of Numerical Control Machine Tool
Authors: Liu Shi Hao , Ye Wen Hua , Chen Wei Fang , Zhang Ting
Published: October 2009

Processing precision of numerical control machine tool is decided by static rigidity and dynamic rigidity of spindle to a great extent. 3- D model of numerical control machine tool was established by using parametric modeling and virtual assembly function of Solidworks. Simultaneously, simulation and Experiment study of the spindle static rigidity was carried out, and practicability of the simulation analysis method was proved. The result indicates that the biggest deformation appears in the front of spindle. The static rigidity of spindle can been enhanced greatly by enhancing three carriage-feed system’s static rigidity of machine tool. The simulation for the dynamic rigidity of spindle indicates that the dynamic rigidity of spindle is uniformly distributed and resonance can be avoided effectively by the spindle when working.
Generation of Optimized Assembly Sequences Based on Priority Rules Screening
Authors: Yu Jia Peng , Wang Chen Gen , Yu Hong , Zhang Wen Lei
Published: October 2009

Contact-connection matrix is proposed to describe contact and connection relations between components. Extended interference matrix is given to settle non-orthogonal assembly problems effectively which other current methods are incapable of. Several rules that influence the efficiency of assembly are studied from the quantification point of view. The priorities of the rules can be customized to screen optimum components in every cyclic process to comprise an optimized sequence automatically, using the above matrices. The prototype system is developed on UG NX platform and a fixture with 30 parts containing tilt assembly directions is demonstrated as an example. The results indicate that the algorithm is efficient and flexible.
Fault Diagnosis of Engine Based on Improved Dempster-Shafer Information Fusion Method
Authors: Zhou Wei , Liu Ying Ji , Cao Qing Fu , Zhang Tian Xia
Published: October 2009

In order to enhance the accuracy of engine fault diagnosis, information fusion technology was applied and a novel combination method is proposed based on D-S evidence theory. The evidence groups were classified by evidence conflict coefficient, the importance of each highly conflict evidence was calculated, and the credibility of each evidence was determined with a distance function of evidence bodies. Then the weight value of each evidence was revised with its importance and credibility respectively. Finally, the Dempster combination rule was used to realize the information fusion. The effectiveness of the new approach proposed was verified by theoretical analysis and experiment research results. Comparing with D-S evidence theory and the improved synthesis formula, the new combination method is more efficient in improving the accuracy and the certainty degree of engine fault diagnosis.
Job Shop Scheduling Problem Based on Requirement Forecasting Aiming at Instant Customerization
Authors: He Li , Liu Yong Xian , Xie Hua Long , Zhang Yu
Published: October 2009

The characteristic of Instant Customerization (IC) and its job-shop scheduling problem is described. The customer requirements were divided into static forecasting and dynamic forecasting aiming at IC, that is common requirement forecasting and individualized requirement forecasting. According to the characteristics of the problem, the job shop scheduling part of the system is then programmed with an algorithm, PSO. Simulation results showed that requirement forecasting can provide an excellent delivery date to adapt to the IC job-shop problem.
Manipulability Analyses of the 3-DOF Parallel Machine Tool
Authors: Hu Ming , Tian Wen Yuan , Shi Jia Shun
Published: October 2009

A 3-DOF in-parallel machine tools based on a tripod mechanism is developed and studied, the kinematic is analytically performed, the workspace is derived, Analysis of the a number of conditions of the Jacobian matrix and manipulability is carried, The manipulability analytical of the parallel machine tool is investigated
Research on Data Processing in Network Supported Collaborative Design
Authors: Wang Qi , Wang Lei , Liu Yong Xian
Published: October 2009

In the course of network supported collaborative design, the data processing plays a very vital role. Much effort has been conducted in this area and many kinds of approaches have been proposed. Based on the correlative materials, this paper presents XML –based strategy for several important problems of data processing, such as the representation of STEP with XML in the product information expression and the management of XML documents using relation database. Finally the structure of data processing system based on XML is presented.
Numeric Analysis for Resonant Frequency of Rotating Blade
Authors: Zhao Di , Ding Ke Qin , Shang Xin Chun
Published: October 2009

The paper implements numeric computation to analyze free vibration characteristics of rotating blade by the means of finite element method. The effects of rotate speed and temperature on the resonant frequency of blades are considered. The static frequency and the dynamic frequency under working speed for the room temperature and working temperature are calculated, and the various modes are obtained. The resonance analysis is given by Campbell graph in which shows the distribution of resonant points for resonant frequency and rotate speed under the different excitation.
Key Technology and System Implementation of Distributed Collaborative Design in Hydraulic System
Authors: Li Wei Min , Li Tie Jun , Liu Shu Fen
Published: October 2009

The state-of-art of collaborative hydraulic system design and the necessity to carry on collaborative hydraulic system design are summarized. The architecture and implementation methodology of Web-based collaborative product design system are presented, with some key techniques of implementing collaborative hydraulic system design being discussed in detail.
Virtual Design and Structural Optimization of Dry Twin Screw Vacuum Pump with a New Rotor Profile
Authors: Zhang Shi Wei , Zhang Zhi Jun , Xu Cheng Hai
Published: October 2009

Twin screw vacuum pump is an important kind of dry vacuum pump, which is widely used in the oil-free vacuum system. The design of the screw rotor profile directly influences the working performance and manufacture cost of the screw pumps. In this paper, a new rotor profile for twin screw vacuum pump is introduced which is comprised of the cycloid curve, the dedendum circle arc, the involute curve and the addendum circle arc. The processes of three-dimensional modeling, motion simulation, interference checking and structural optimization for twin screw vacuum pumps are studied by means of Solidworks software. The works provide theoretical basis for optimal designing and reference for test prototype manufacturing. The results showed the performance of the vacuum pump according with the designer’s intention.
Design of Self-Regulating Fuzzy Control System for Vacuum Sintering Furnace
Authors: Feng Qi Gao , Mao Han Ping , Zhang Xue Ming
Published: October 2009

Although the traditional PID controller is widely used in many practical application fields, it’s unsuitable for the control of the complex plant. The powder metallurgy sintering process had such characteristics as nonlinearity and large delay, etc., and it’s difficult for the conventional PID controller to meet the control requirements. According to these traits, we used a parameter self-adjusting fuzzy controller to control the heating temperature of the vacuum sintering furnace. In practice it shows that every quality index and control effect of this scheme is better than that of traditional PID controller.
Global Manufacturing: Reconfiguration of Machines in Addressing Changing Customer Requirement Scenarios
Authors: Flowers Michael , Cheng Kai
Published: October 2009

The dynamics of customer requirements in the global domain are dictating a need for the reconfiguration of existing conventional manufacturing systems in order to adapt and respond to the changing functional requirements. This study presents the investigation of the feasibility of adapting a hydraulic cam system to a power press for uphill sheetmetal piercing. The surface topography of sheared edges of blanks and slugs was analyzed using Zygo New View 200 Scanning White Light Interferometer. The piercing force in each trial was monitored and analyzed via computer-press interface data acquisition system (DAS). The average piercing force, 10721N, obtained was found to be nearly constant throughout the experimental trials.
Design of Compound Fuzzy Controller for Multivariable Systems
Authors: Zhang Xue Ming , Zhang Gui Xiang , Shao Feng , Yang Qing Jie
Published: October 2009

The PID controllers can be seen in lots of fields, but some complex control system cannot be controlled to achieve a desired performance index. A design method of the fuzzy PID controller that is based on the fuzzy tuning rules and formed by integrating two above control ideas is proposed in this paper. The design procedure about fuzzy PID control can be divided two steps: the first step is to build the fuzzy tuning rules by analysis, and to obtain the parameters of PID controller by reasoning, and then the control action can be determined by the PID control law. The simulation results and the practical control effects show that the compound fuzzy PID controller has better performance than that of the conventional PID control system and meet the practical demands.
Design System Development of Tool Magazine for CNC Machine Tools
Authors: Sheng Zhong Qi , Xie Hua Long , Xu Zhi Wei , Li Peng
Published: October 2009

As an important part of CNC machine tools and machining center, automatic tool changer is the basis to realize continuous processing of multiple machining operations. The design system development of tool magazine is an engineering of complex system. Based on the secondary development technology of UG, this paper developed the design and management system of tool magazine and realized the standardization and the process of design procedure. After introducing the basic idea of design system development, this paper presented function modules and design workflow of tool magazine respectively. The management system for tool magazine was given next. UG-based development of tool magazine for CNC machine tools can meet the design need and improve the design quality effectively.
A Dynamic Group Service Recommender System in Migrating Workflows
Authors: Wang Rui , Zeng Guang Zhou
Published: October 2009

Workflows provide the automation of business processes for streamline organization structure, increase efficiency, and reduce costs. In this paper, we propose a new scheme called Dynamic Group Service Recommendation (DGSR) which comprises group setup, joining group, group recommendation and verification phase. The simulation results demonstrate that DGSR significantly boosts the performance of active services. This group service recommender system is especially beneficial to concurrent transmissions of shared data in migrating workflows.
Security Solution of Mobile E-Commerce Based on WAP
Authors: Jin Min Li , Cheng Yang , Peng Wu Liang
Published: October 2009

This paper making good study and use of the advanced mobile e-commerce technology adopted by foreign advance countries, and technically analyzing the safety risk of the existing application model of WAP, and putting forward a new end-to-end security solution based on WAP, this solution needs two important processes which to improve end-to-end data transmission security by the create process of session key for security and the data transmission process by using of digital signature.
With the popularization of the Internet and the rapid development of mobile communication technology, mobile e-commerce has become the inevitable trend of social development, and the safety problem is the main bottleneck which restricts social development. Mobile e-commerce brings more complex safety problem than traditional e-commerce because using a lot of new technology and equipment. So it is important to improve the safety performance and healthy development of mobile e-commerce, and to promote social information and national economy information.