bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of the Image-Based Fast Design for 3D Toys and Cartoons
Authors: Wang Jin , Zhu Guang Yu , Lu Guo Dong , Chen Gang , Zhang Dong Liang
Published: March 2010

This paper takes the 2D image of toys and cartoons as reference to assist the amateurs to design 3D models fast and conveniently. A contour deep tracing algorithm is proposed for acquiring the whole contour, and Ferguson interpolation curve is introduced to fit the contours. Taking the control points of Ferguson curves as reference, amateurs can easily sketch curves that fit to the image contours. Decomposing the extracted contours into several feature regions, the users can draw some enclosed component contour curves of the target toys or cartoons, and then adopt proper methods to generate the 3D mesh of components. Three modeling methods, namely local deformation, symmetric deformation, and 2D FFD deformation, are introduced for modeling the 3D surface fast. Ferguson curves are also used in 3D painting on triangular surface, and large regions enclosed by the painted colors can quickly be filled with a target color. The users select a region of the image and drag them onto 3D models, and then the details, such as eyes, nose, and artistic patterns can be easily painted.
Droplet Transfer and Microstructure of Q235 Steel Thick Plate Using CO2 Welding with Additional Longitudinal Magnetic Field Controlling
Authors: Luo Qian , Lu Duan Min , Luo Jian
Published: March 2010

In this paper, a new welding experiment is studied by applying an additional longitudinal electromagnetic field to CO2 welding process (abbr. LEM-CO2 welding).The characteristics of droplet transfer, macrostructure and microstructure are compared between LEM- CO2 welding and general CO2 welding on Q235 low carbon steel thick plate joint. The research results shows that, an additional longitudinal magnetic field can have a significant effect on properties of the droplet transfer in CO2 welding, the frequency and stability of the droplet transfer in LEM-CO2 welding are improved. The grains of welding seam are refined and welding joints has a higher quality. So the additional longitudinal magnetic field is a very simple and effective method to improve the properties of CO2 welding thick plate joint.
TRIZ in 3D Garment CAD
Authors: Li Wei Long , Wang Jin , Lu Guo Dong
Published: March 2010

The 40 inventive principles of TRIZ are useful methods for solving engineering design problem. 3D garment CAD is significant for improve the efficiency and level of fashion design. This article describes the application of these principles of TRIZ in three-dimensional garment CAD. Based on the characteristics and requirements of fashion design, the author analyze the basic meaning of these inventive principles, and use them in the research and application three-dimensional garment CAD, such as decomposition and combination of virtual apparel components, clothing structural design, setting of clothing color and pattern library, inter-conversion between three-dimensional mesh of clothing and two-dimensional pieces and so on. Some examples show that the application of these principles is feasible and effective.
Modeling and Experimental Analysis the Effect of Minimum Chip Thickness on Cutting Temperature in Micro-End-Milling Process
Authors: Liang Ying Chun , Yang Kai , Bai Qing Shun , Chen W.Q.
Published: March 2010

In this paper, the effect of minimum chip thickness on cutting temperature in micro-end- milling of aluminum alloy Al2024-T6 using a tungsten-carbide cutter are investigated and analyzed. The three-dimensional coupled thermal-mechanical finite element model is adopted to determine the effects of varying depth of cut on cutting temperature considering size effects. The simulation results show that the cutting temperature in micro-end-milling is lower than those occurring in conventional milling processes. When the depth of cut is approximately 40% of the cutting edge radius, there is no chip formation. The maximum temperature occurs at the contact region between micro cutting edge and workpiece, which shows an obvious size effect. The experimental verification of the simulation model is carried out on a micro-end-milling process of aluminum alloy 2024-T6 with a high precision infrared camera. The influence of various cutting depths on cutting temperature has been verified in experiments. The experimental measurements results are in a good agreement with the simulation results.
Effects of Ultrasonic Vibration on Machining Accuracy in Drilling
Authors: Zhang Cheng Mao , Zhang De Yuan , Ma Xiao Jie
Published: March 2010

Generally in the drilling of micro and small hole such as nozzle, problems frequently occur in terms of burr formation at the cutter exit, breakage of the drills and degradation of machining accuracy. A recent and promising method to overcome these technological constraints is the use of ultrasonic vibration drilling. This paper presents the design of an ultrasonically vibrated tool based on tailstock of lathe and the experimental investigation of ultrasonically assisted drilling of 3J1 stainless steel. The location accuracy of entering drilling and linear of drill were measured and compared. The obtained results show that the application of ultrasonic vibration can improve the machining accuracy considerably.
Experimental Study on Wear Mechanism of Cutting Tool and Cutting Temperature in High Speed Machining Superalloy
Authors: Liu Chao , Ai Xing , Liu Zhan Qiang
Published: March 2010

Two kinds of Cemented carbide tools were used to turn Iron-based superalloy GH2132 at 80m/min-210 m/min under dry cutting condition. Infrared thermometer was used to measure cutting temperature, Tool wear was observed by SEM, and oxygen element distribution of tool surface was analyzed by EDS. Adhesive wear oxidation wear were the main wear mechanisms of the coated cemented carbide tool, Adhesive wear, abrasive were the main wear mechanisms of the carbide tool. Oxidation wear occurs above a certain temperature about 430°C, the higher the temperature the more serious the oxidation wear is. The results might be helpful to guiding the design and selection of tool materials and control of tool wear in high speed machining processes.
Research on the Error Model of a Nanometer Precision Stage
Authors: Yang Guo Zhe , Lin Hai Bo , Liu Feng
Published: March 2010

The paper based on the domestic research result and foreign research result on error compensation, aimed at the geometric feature of a three dimensions micro-EDM stage. By the coordinate matrix transformation method, we have developed the three dimension kinematics synthesis error mathematical model. Then the micro-EDM stage error was compensated. The error model for the stage is simple and error compensation is easy.
Uniformity of Kinematic Trajectory with Wafer Driving Initiatively in Plane Lapping Process
Authors: Gao Peng Fei , Wang Wei Fang , Wen Dong Hui
Published: March 2010

This paper analyses the kinetic trajectory of abrasives both in initiative driving mode and passive driving mode, and the uniformity of lapping trajectory of the two opposite drive modes is discussed, respectively. The imperative relation between the kinematic trajectory and the uniformity is researched in this paper, as well as the simulation of the lapping trajectory.
The Characterization and Experiment Research of Ultrasonic Rolling Machining for Column Surface
Authors: Ding Jin Fu , E Shi Ju , Zhang Ke Hua , Yu Fu Jin
Published: March 2010

The machining method and characteristic of the ultrasonic extrusion-rolling machining was introduced in the paper. According to the machining characteristic, the kinematic analysis of the machining mechanism and surface anamorphic was analyzed too. And then the correlative theory of tribology was adopted to discuss the relation between surface anamorphic quantity and the technological parameter. The theory foundation was afforded for the choice of technological parameter.
Applying TRIZ for Optimization Formulation of Sapphire Precision Lapping
Authors: Wang Xiao , Lu Cong Da , Hong Tao
Published: March 2010

This paper presents the parameters optimization by TRIZ theory in the precision lapping of sapphire in order to realize the high efficiency and low damaged lapping. The TRIZ theory was used to optimize processing parameters of sapphire precision lapping based on much experimental data of lapping, then the conflict matrix of internal contradictions was set up and the optimization parameters was obtained. The result of experiment indicated that the face quality of sapphire was improved greatly after optimized by TRIZ. There was a conclusion that TRIZ theory can be used to optimize the processing parameters of sapphire precision lapping which is important to enrich the processing theory of sapphire.
Research on Hole Expanding with Spiral-Fluted Electrode in ECM
Authors: Yin Yang , Yin Guo Fu
Published: March 2010

A manufacturing technology applying a special spiral-fluted electrode in traditional ECM (Electro-chemical Machining) is introduced, this method is provided with the advantages of both narrow-gap ECM and pulsed current ECM. It is a new technological method for expanding holes in hard metal materials parts. In this paper, a new type ECM electrode is proposed to solve hole expanding problem in carbide drill bush. The machining principles and the influence of some operating parameters of ECM on the machining precision and productivity are described. Experiments results indicate that the accuracy and quality of the machined surface and the machining efficiency could be improved greatly by applying spiral-fluted electrode in ECM. It is also showed that the inner surface of the carbide bush was finished easily by this method with the optimal operating parameters, at the same time, the surface roughness of a machined hole is improved to 1ess than 0.2m Ra, and the dimensional accuracy of hole can reach 0.02mm.
Reconstruction of Turbocharger Design Exploration
Authors: Qiu Li Jun
Published: March 2010

Concidering the inadequate of the turbosupercharger, a novel reconstruction method is proposed, and the layout of the turbocharger is developed, considering the connection of the turbocharger and technics, the design scheme for the turbocharger is presented by using the reconstruction method, the present analysis provide the thoery base for the applications of the turbocharger.
Tool Wear Image Segmentation Based on Markov Random Field Model
Authors: Xiong Si Chang , Dong Ling Ping , Wen Dong Hui
Published: March 2010

In this article, we propose a tool wear image segmentation algorithm based on Markov Random Field model. In this algorithm, the wear area was divided into wear area, background area and body area, in terms of the MAP (maximum a posteriori) criterion, and we got the pre-segmentation image. Afterwards, the aiming area (region B) was segmented out from the wear area by using peak-band algorithm and the edges are integrated in mathematical morphology theorem. As a result, we obtained an integrated tool wear region. Experiments indicate that the segmentation algorithm can be used to evaluate the degree of tool wear and applied to synchronously monitor tool wear condition effectively.
The Real-Time Prediction of Surface Roughness Based on Genetic Wavelet Network
Authors: Chi Jun , Chen Lian Qing
Published: March 2010

A methodology based on relax-type wavelet network was proposed for predicting surface roughness. After the influencing factors of roughness model were analyzed and the modified wavelet pack algorithm for signal filtering was discussed, the structure of artificial network for prediction was developed. The real-time forecast on line was achieved by the nonlinear mapping and learning mechanism in Elman algorithm based on the vibration acceleration and cutting parameters. The weights in network were optimized using genetic algorithm before back-propagation algorithm to reduce learning time.The validation of this methodology is carried out for turning aluminum and steel in the experiments and its prediction error is measured less than 3%.
Theoretical Analysis and Uniformity of Trajectories in Lapping Process
Authors: Wang Wei Fang , Gao Peng Fei , Wen Dong Hui
Published: March 2010

A new trajectory and uniformity was studied for single lapping process, kinematic theory analysis trajectories of the workpiece under the mode driven by swing motion. According to the theoretical analysis on lapping trajectory and simulated results, uniformity during swing driven lapping process is better than tranditional lapping process, angle rotation ratio between lapping plate and swing plate has great effect on lapping uniformity, when rotation speed of lapping plate is three times to that of swing plate, best uniformity could be gotten during lapping process.
Research on Temperature Field about Cutting Area in Plunge Milling Ti Alloy Based on Finite Element
Authors: Qin Xu Da , Liu Wei Cheng , Jia Hao , Ji Xiao Lai
Published: March 2010

Because of the small thermal conductivity coefficient of Ti alloy, the heat cannot disperse timely and accumulate seriously when plunge milling Ti alloy. If the cutting parameters can not be controlled well, the phenomenon of sticking will happen easily. According to the simulation and analysis of temperature field by using finite element software ABAQUS, the influence on cutting speed and feed for the Distributing of Temperature Field about Cutting Area in Plunge Milling Ti Alloy is acquired.
Study on Application of Rapid Prototyping in Precise Oral and Maxillofacial Surgery
Authors: Liu Yun Feng , Dong Xing Tao , Zhu Hui Yong , Peng Wei
Published: March 2010

Conventional methods for diagnosis and operation planning based on 2D image are still widely used in oral and maxillofacial prostheses surgery, and the accuracy and efficiency are needed to improve eagerly. Aiming at this problem, rapid prototyping (RP), a technique of advanced manufacturing, is applied to fabricate the physical model of bone, and which is used to simulate the operation further. The procedure of RP based precise surgery is presented, and some key techniques including CT image processing, 3D bone model reconstruction, repairing model design, physical model fabrication, pre-operation simulation are discussed in detail. Total 25 successful clinical applications illustrate that, with RP based precise surgery methodology, the efficiency and quality of oral and maxillofacial prostheses can be improved effectively.
Study on a Robust NURBS Interpolator
Authors: Zhang Mian Hao , Liu Zhi Qiang
Published: March 2010

In this paper, the shortcomings of the NURBS interpolator based on Taylor expansion were analyzed and shown clearly based on studying the definition and characteristic of the NURBS curve. The length function and inverse length function were employed in the length calculation of the singularity NURBS curve. The inverse length function was used to validate the length calculating of the NURBS curve. At last, a robust NURBS interpolator algorithm with singular knots was proposed.
Overview of Development and Application of Ultra-Smooth Surface Abrasive Flow Polishing Techniques
Authors: Zhang Ke Hua , Wang Guo Feng
Published: March 2010

Development of ultra-smooth surface processing technology has great effect on the frontier technologies and defense industry, this attracts many countries to invest and highlight the research works related to ultra-smooth surface abrasive flow polishing technology. This paper gives a global review on the functional effect of ultra-Smooth surface abrasive flow polishing technology on the modern industry. Recent research achievements and machining accuracy developed by several famous universities were introduced and the principle and structure of the machining device were explained, according to the new demands for the future, the tendency of ultra-smooth surface abrasive flow polishing technology was suggested, especial emphasis on the precise polishing tool and the technology of soft contact between abrasive and workpiece.
Study on the Cutting Properties about Magnesium Alloy when Dry Turning with Kentanium Cutting Tools
Authors: Guo Xu Hong , Teng Li Jun , Wang Wei , Chen Ting Ting
Published: March 2010

In recent years, the machinability of magnesium alloy is concerned more and more by the public. In this paper, a study on the cutting properties of magnesium alloy AZ91D when dry turning with kentanium cutting tools is presented. It shows the cutting force measured by a data acquisition system which is made up of Kistler9257B piezoelectric crystal sensor dynamometer, Kistler5070A10100 charge amplifier and computer. The effect of cutting parameters on cutting force was studied, and the experimental formula was built. The tool wear and chip characteristics were observed with KYKY-EM3200 electron scanning microscope and EDAX PV9900 alpha ray spectrometer, while the surface roughness of the workpiece was measured with 2205 profilometer. Results showed that the cutting depth was the main influence factor on cutting force, followed by feed rate and cutting speed . The main form of tool wear showed to be diffusive wear and adhesive wear. The feed rate had the main influence on chip form and the workpiece surface roughness, cutting speed was less effective, the cutting depth was the least.
Numerical and Experimental Research of the Slurry Film in Chemical Mechanical Polishing (CMP)
Authors: Lou Fei Yan , Deng Qian Fa , Yuan Ju Long
Published: March 2010

A three-dimensional hydrodynamic lubrication model for chemical-mechanical polishing is presented based on the Reynolds equation and Reynolds boundary condition. By solving the Reynolds equation, the slurry film pressure distribution has been obtained. The effects of minimum film thickness and the wafer tile angle on the film pressure are analyzed, and the influence of the polishing applied load and rotation speed on slurry film thickness and tilt angle are discussed. At last, by experiment, it is found that the simulation results are similar to experiment results which film thickness is increasing with the increasing of rotation speed, decreasing of the applied load. It is proved that the simulation is reliable.
Structural Levels Model of Performance Behavior and Collaborative Design of High Speed Milling Cutter
Authors: Jiang Bin , Zheng Min Li , Qi Chang Xing , He Jia
Published: March 2010

High speed milling cutter is a representative cutter for high efficiency cutting, there is the indeterminacy induced by small sample and lacking information in evaluating its performance. By the analysis of cutter characteristics, acquires the data of structure, material and cutting parameter affecting the performance of cutter, and constructs structural levels model of performance behavior in designing cutter. Using the theory of axiomatic design, investigates mapping approach among structural domain, material domain and functional domain, and propounds collaborative design method of multilevel high speed milling cutter. Results of performance analysis and high speed milling experiment show that the model indicates the interaction among structural levels of cutter, and the design method makes the performance of cutter satisfy the requirements of safety, stability and high efficiency cutting.
Thermomechanical Simulation of Single Splat Solidification and Cooling in Plasma Spray Forming
Authors: Zhu Liang Rong , Zeng Hao Ping , Xu Wen Ji , Li Hong You
Published: March 2010

Mechanical strength and service life of the coatings manufactured by plasma spray forming are significantly reduced by residual stresses. A 2D finite element model constructed for temperature and residual stress simulation of a single stainless steel splat solidifying and cooling on the carbon steel substrate is presented in this paper. Simulated results show that the temperature of the splat rim is higher than that of the central part during the initial stage of solidification, and the temperature difference between the two parts reverse thereafter. The minimum residual stress locates at the rim of the top surface of the splat, and the maximum residual stress, which decreases when the substrate is preheated to a higher temperature, situates at the rim of the interface. Stresses appear as tensile stresses within the splat and compressive stresses within the substrate. The research can provide quantitative understanding of the temperature and residual stress states at the splat level.
Micro-Quality Control on Ultra-Precision Machining of Sapphire Substrates
Authors: Zhou Hai , Bai Li Gang , Wang Dai Pin
Published: March 2010

This paper proposed a new approach to control the micro-quality of sapphire substrate, in order to grow GaN on substrate. The main factors that influence macro-quality are the method of slicing, grinding and polishing. Thread speed of slicing is less than 0.5m/s. Ductile mode grinding of substrate is achieved by #3000 diamond wheel and feed of 1μm/r. The suitable polishing conditions are that the SiO2 grain size is less than 10nm, the concentration SiO2 is 3％, pH value of polishing liquid is 10.5 and polishing stress is 190Pa. The undamaged substrates have been obtained steadily. The surface roughness RMS is less than 0.4 nm.
Process Optimization for Suction Plastic Forming of In-Mold Decoration Plastic Sheet with CAE
Authors: Gao Bin , Nan Xiu Rong , Wu Bai Zhong
Published: March 2010

The suction plastic forming process for in-mold decoration plastic sheet has been the best process for thin-shell plastic exterior decoration parts. But the suction plastic forming products still suffers from the uneven thickness. Based on the general finite element analysis software POLYFLOW for viscoelastic fluid, a set of optimization methods for suction plastic forming process of in-mold decoration plastic sheet is introduced in this paper to reduce the uneven level of thickness. These methods include establishing process optimization scheme, building mesh model, selecting the material constitutive model and determining its parameters, imposing boundary conditions and blowing pressure, and applying the mold movement. Finally, the optimized suction plastic forming process is used to produce the in-mold decoration plastic rear bumper sample of an automobile, and the results show that optimized process is effective and applicable.
Present Situation and Development Trend of Precise Wire Cutting Technology of Silicon Wafers
Authors: Du Hong Wen , Yu Yuan Zheng
Published: March 2010

With the rapid development of IC and photovoltaic industry, the requirements of larger-diameter, better productivity, higher machining accuracy and finer surface quality of silicon wafers challenge traditional wafer cutting technology. Therefore, in terms of increasing wafers’ diameter, lessening slicing thickness, reducing cutting loss and improving machining efficiency, research and application of precision cutting technology become necessary and urgent. The paper analyzes current well-developed technologies and equipments of free abrasive wire cutting in detail. It is recommended that bonded abrasive diamond wire cutting will be the development trend in the future as a highly-efficient, low material waste and environmentally friendly technology of precise cutting of silicon wafers. The paper also makes a discussion on construction, working principle, and manufacturing technology of bonded abrasive diamond wires.
NC Milling of Profiled Screw
Authors: Miao Zhi Yi , Yang De Qing , Yu Hui
Published: March 2010

Machining of the variable pitch screw is difficult in mechanical manufacturing and that of variable pitch and depth screw is more difficult.This paper argues about applying macro program to machine profiled screw in NC milling machine tool and the result is of satisfaction.This provides another method for the machining of profiled screws.
Rapidly Planning Approach Based on CBR for AO of Mechanical Product
Authors: Zhang Kai Fu , Wang Zhong Qiang , Liu Ping , Li Yuan
Published: March 2010

During the process of developing product, AO directly affects assembly efficiency and assembly quality for mechanical product. Usually, new mechanical product is developed according to the knowledge and experience. So it is very important how to utilize the knowledge and experience to plan the AO. This paper presents a planning approach based on CBR for AO of mechanical product. Firstly, a method based on hierarchy model represents AO cases. And we store the AO cases into the AO Case Library to accumulate the knowledge and experience of assembly process. Secondly, the Euclidean distance is applied to calculate the similar characteristic between the component of AO of Query (AOQ) and the component of the AO cases in the Library. When some distances are less than the value, the corresponding AO cases are selected to the next calculation. Thirdly, the Manhattan distance is applied to calculate the similar characteristic between AOQ and the selected AO cases. When the distance is minimal, the optimal AO case is obtained. The approach is applied successfully to plan AO for a part of aircraft’s wing.
Single Item Lot Sizing Models with Bounded Inventory and Remanufacturing
Authors: Wang Neng Min , He Zheng Wen , Zhang Qiu Shuang , Sun Lin Yan
Published: March 2010

Dynamic lot sizing problem for systems with bounded inventory and remanufacturing was addressed. The demand and return amounts are deterministic over the finite planning horizon. Demands can be satisfied by manufactured new items, but also by remanufactured returned items. In production planning, there can be situations where the ability to meet customer demands is constrained by inventory capacity rather than production capacity. Two different limited inventory capacities are considered; there is either bounded serviceables inventory or bounded returns inventory. For the two inventory case, we present exact, polynomial time dynamic programming algorithm based on the idea of Teunter R, et al. (2006).
Study on Conversion of Customer Needs in Product Development
Authors: Zeng Fu Hong , Zhou Lan Hua
Published: March 2010

In order to translate the Customer Needs (CN) for the specific product into the right Technical Requirements (TR), the structure of conventional House of Quality (HOQ) is modified to have HOQ fit in with the needs of multi-attribute decision-making. Then, an Objective Programming Model (OPM) based on HOQ is constructed, which fully considers the design team's experience, and the interdependence between CN and TR, and the inner-dependences within themselves, along with resource limitations, and multi-objective nature of the problem. The target values of TR are obtained by solving the OPM using MATLAB, which can fully meet the CN. Finally an example is given, and the OPM is proved to be reasonable and effective.
Time Window Constraint Conflict Resolution Algorithm for Collaborative Design Process Scheduling
Authors: Yang You Dong , Guo Wei Qing , Hu Xia Xia
Published: March 2010

Aim at complex relationships among design tasks after task grouping for the collaborative product design process scheduling, the constraint conflicts of the task time windows would be generated in the task scheduling process, and the reasons of constraint conflicts are analyzed. Based on the least waiting times and time, a time window constraint conflict resolution algorithm is put forward, and the high parallel requirement is implemented for the collaborative design process.
Research on the Construction of Emergency Shelter Public Facility
Authors: Zhao Feng , Yang Hao Zhong , Wang Ting , Liu Xiao Xia
Published: March 2010

In this paper, a new thought on combination of the construction of emergency shelter facility and general civic public space facility is proposed. By deep analysis of the present problems and causes of the emergency shelter public facility construction, raising the new concept of Earthquake Elusion Public Facility from earthquake elusion site’s dual function of emergency shelter and civic public space. On the basis of deep and careful demand analysis of earthquake elusion site emergency facility and general facility of civic public space, proposing a brand new design idea of the combination the designs of the two. At last provides a design example and analyzes it.
Kinematic Analysis of Detection of Steel Ball Surface Defect Based on ADAMS
Authors: Wang Yi Wen , Ding K. , Jia Dong Kai , Liu Xian Li , Yue Cai Xu , Zhao Zhong Yang
Published: March 2010

In the detection process of the ball detector, surface can not unfold effectively, which brings about that the camera can not capture the image which we want, resulting in a high rate of defect and at a low efficiency in the test with the ball detector. In order to solve this problem, the optimized design on the mechanical control parts of the expansion organization was carried out, besides, kinematics analysis model the expansion organization and a motor control timing schedule were created by ADAMS, enabling expansion process consistent with the mathematical modeling. To a certain extent the optimization results improve overall performance of the system, which plays a guiding role in the improvement of the system.
Multi-View Modeling Scheme and Total Solution for Enterprise Digitalization
Authors: He Xiao Bing , Liu Fie , He Yan , Yan Chun Ping
Published: March 2010

Enterprise Digitalization depends to a large extent on models of enterprise process built for design and analysis. From the perspectives of product life cycle and enterprise informationization lifecycle, the paper outlined a modeling scheme with IDEF suite which guided multi-view modeling of Enterprise Digitalization and its process, and provided a total solution for Enterprise Digitalization, which would facilitate internal informationization systems of enterprise integrated with networked systems outside the enterprise to support business operations, and make enterprise manufacturing sectors integrated with external networked manufacturing systems and production equipments seamlessly.
Intelligence Selection System for Honing Parameter Based on Genetics and Artificial Neural Networks
Authors: Pu Wen Yu , Rui Yan Nian , Zhao Lian Sheng , Zhang Chun Yan
Published: March 2010

Appropriate selecting of process parameters influences the machining quality greatly. For honing, the main factors are product precision, material components and productivity. In view of this situation, a intelligence selection model for honing parameter based on genetics and artificial neural networks was built by using excellent robustness, fault-tolerance of artificial neural networks optimization process and excellent self-optimum of genetic algorithm. It can simulate the decision making progress of experienced operators, abstract the relationship from process data and machining incidence, realize the purpose of intelligence selection honing parameter through copying, exchanging, aberrance, replacement strategy and neural networks training. Besides, experiment was performed and the results helped optimize the theories model. Both the theory and experiment show the updated level and feasibility of this system.
Automatic Modeling for Workflow Simulation with GPSS
Authors: Xie Yi
Published: March 2010

Workflow simulation plays an important role in successful implementation of workflow management. However, workflow simulation usually requires a certain amount of expertise and is used by simulation modeling practitioners rather than business analysis specialists or enterprise managers. So, it is prevented from becoming a mainstream analysis and evaluation tool of a workflow. In order to apply simulation to analysis, evaluation and optimization of the workflow performances, workflow process model for simulation is firstly defined and formalized. Then an approach of translating workflow process model into GPSS simulation model is presented so that workflow simulation model can be built automatically according to the workflow process model. Finally the supporting software tool system has been developed which shows feasibility of the proposed method
Research and Design on Green Reconfigurable NC Machine Tool
Authors: Wang You Jun , Wu Fu Jia , Xie Fang , Yao Kai , Hou Zhong Ming
Published: March 2010

The thesis researched the relationship between green design and reconfigurable on NC machine tool, and expatiated that the development of the reconfigurable machine tools is essential. This article has carried on the analysis from the deep hole components classification and the formed movement craft two aspects to the deep hole components race. The reconfigurable deep hole machine tool was to carry on the modular design based two aspects for the module partition and reconstructable analyze, solved the key technologies the machine tool modulation design. From the machine tool bed module, the head of machine tool module, the cutting tool auxiliary system and the numerical control system four aspects, to design and research on reconfigurable machine tool, solved the difficult design problem which the part reconfigurable designed.
Engineering-Oriented User Interface Design Patterns
Authors: Feng Shi Hong
Published: March 2010

Patterns have become a more effective way on the knowledge use of the HCI domain. These patterns are mainly oriented to different tasks, which are too coarse-grained to be easily implemented. And it is not given that how to use these patterns to built user interfaces in engineering way. Furthermore, many different patterns are oriented to different models in the model based on user interface (UI) development, which are hard to be integrated into the UI development tool. In point of increasing UI knowledge reuse, every UI is divided into many presentation units (PU), which reduces the grain of UI. Next, the UI feature space is given through three facets and various relations among these facets. Therefore, the Engineering-oriented User Interface Design Pattern (EUIDP) is proposed from the interior model, the presentation model and the operation model. As a case, the Grid EUIDP is explicitly described according to the form of EUIDP. Finally, the conclusion and the further work are discussed.
Modeling Research of Ridge-Till and No-Till Seeder Based on the Virtual Manufacturing Technology
Authors: Luo Hong Qi , Tang Xiao Hua , Shen Xiao Hong , Nie Xue Jun , Liu Xia
Published: March 2010

A kind of ridge-till and no-till wheat seeder was developed according to the agricultural requirement of mulching with high maize stubbles. The three-dimensional models of the seeder were built with the software of Autodesk Inventor, including the frame, openers, reshaping devices, combined press roller and driving wheel devices. Reshaping devices were designed to reshape the former ridges, while combined press roller is used to press ridge sides and seeding zones simultaneously. Based on the parts modeling, the virtual assembly model of the ridge-till and no-till seeder was constructed, which can contribute to designing the simulation model of the seeder for dynamics analysis.
A Theoretical Architecture for Regional Manufacturing System
Authors: He Xiao Bing , Liu Fie , He Yan , Yin Hua Chuan
Published: March 2010

China’s manufacturing industry has obvious regional characteristics. With the regional economic development, how to improve the overall competitiveness of the regional manufacturing industry has become an important research subject for regional development. This paper analyzed the possibility of constructing Regional Manufacturing System (RMS) from the aspect of regional industrial association degree, puts forward the theoretical architecture of RMS which provides a reference model for the optimizing operation of the Manufacturing System and the business cooperation among the manufacturing enterprises in the region.
Study on the Bounded Inventory Model with Returning Items and Disposals
Authors: Wang Neng Min , He Zheng Wen , Sun Lin Yan
Published: March 2010

This paper addresses a dynamic lot sizing problem with mixed returning items and disposals and bounded inventory. The returning items mean that returns are in good enough condition to re-enter the inventory supply stream. The producing, the holding, backlogging and disposals cost functions are concave cost functions. Furthermore, backlogging level and inventory level at each period is limited. The goal is to minimize the total cost of production, inventory holding/backlogging and disposal. A dynamic programming algorithm with complexity O(T3) is developed to solve this model, where T is the length of the planning horizon.
TRIZ-Based Industrial Design Methodology
Authors: Wang Zu Yao , Chen Mei Jun
Published: March 2010

On the basis of the intersection of TRIZ and industrial design, the paper studies the core elements of TRIZ, including principles, methods, rules, and analyses their significance in guiding industrial design practices, also gives research on the application methods of different cases in industrial design. By investigating the commonness of TRIZ and industrial design in products creating activities, the paper summarizes creativity principles and trends forecasting methods in industrial design, so that to found the structure of products innovation knowledge base which grows from creative science and industrial design.
Communication Systems for Factory Automation: A Design Approach Based on MMS and WSs Technologies
Authors: Zhou Bing Hai , Xu Ke Lin
Published: March 2010

Factory automation (FA) is a direct result of the underlying communication systems. To integrate the FA information and make FA control systems with flexibility and interoperability in automated manufacturing systems, the manufacturing message specification (MMS), Web services’ (WSs) technologies and typical FA systems are analyzed. A new design approach of the communication system structure is presented for FA systems in this paper. A prototype of FA control systems is used for evaluating performance of the communication system structure in C++ Visual Studio.NET and Java Borland Builder 9.0 development environment. The experimental results show that the proposed design approach is valid and promising.
A Compound Process Preparing Semi-Solid A356 Alloy Slurry
Authors: Liu Zheng , Mao Wei Min
Published: March 2010

The semi-solid A356 alloy slurry is prepared by compound process, and the effect of the compound process on morphology and size of primary α-Al in A356 alloy is researched. The results indicate that the compound process remarkably affects the morphology and the size of primary α-Al. Primary α-Al with particle-like is distributed uniformly in A356 alloy, and there is no the transient area of change in structure morphology. Compared with the samples prepared by low superheat pouring and slightly electromagnetic stirring, the nucleation rate, morphology and grain size of primary α-Al in A356 alloy are markedly improved by the compound process. The mechanism of refining grain in the compound process is probed.
Effect of Withdrawal Rate on the Microstructures of a Single Crystal Ni-Base Superalloy
Authors: Zhang Jian , Li Jin Guo , Jin Tao , Sun Xiao Feng , Hu Zhuang Qi
Published: March 2010

A single crystal Ni-base superalloy was prepared with five withdrawal rates: 2, 4, 6, 7 and 10 mm/min. Microstructures including dendrite arm spacing, element segregation, and porosity of the as-cast superalloy were investigated. The results showed that as the withdrawal rate increasing, the primary and secondary dendrite arm spacing decreased markedly, the γ/γ′ eutectic became smaller and more dispersive. Meanwhile, when withdrawal rate was higher, W, Ti, Ta and Al segregated in comparatively larger extent. Furthermore, as the withdrawal rate increasing, the amount of alloy microporosity increased, though the size of which decreased gradually. It can be concluded that the withdrawal rate of 4 mm/min and 6 mm/min are optimal for the experimental alloy.
Effect of SDAS on Homogenization of Al-Si-Mg Casting Alloys
Authors: Zou Yong Zhi , Xu Zheng Bin , Zeng Jian Min
Published: March 2010

Aluminum alloy A357 can be heat treated in order to obtain optimum mechanical properties. Moreover, SDAS (Second dendrite arm spacing) is an important structure feature in cast aluminum alloys. The effects of SDAS on the homogenization of Al-Si-Mg alloy are investigated through measurement of SDAS and hardness analysis. The results show that the homogenization time increases as the value of SDAS increases and the homogenization temperature decreases in the homogenization process. The homogenization kinetics equation is: . In addition, the hardness after homogenization treatment at 540°C for 6 hours is advanced with the reduction of SDAS.
An Investigation on the Impurities of Aluminum Alloy in Melt Furnace
Authors: Xu Zheng Bin , Zou Yong Zhi , Wang Wen Chao , Pang Xing Zhi , Zeng Jian Min
Published: March 2010

The scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to characterize samples prepared from the surface scum of melt, the middle flake residues on the furnace wall and the “bottom bulk” after the A357 alloy pouring. The morphology and impurities composition of these features were investigated. Some of particles and regions in samples during the analyses were also studied in detail. The results of analyses show that the surface scum of melt include Al2O3, MgO or MgAl2O4; the impurities of the middle flake residues is comprised of Al2O3, MgO or MgAl2O4, as well as SiO2 particle, Al9Fe2Si2 compound and dimple like C-rich areas; the bottom bulk contains C-rich impurities such as Al4C3 or some of unknown phase or elemental carbon.
Heterogeneous Nucleation for AZ91 with In Situ Synthesis Al4C3
Authors: Luo Xue Quan , Guo Hong Min , Yang Xiang Jie
Published: March 2010

Heterogeneous nucleation is a critical factor for grain refinement magnesium alloys. The paper reports the Al-9wt.%Mg-10wt.%SiCp master alloy were prepared by adding SiCp into the Al-Mg molten with stirring in 610-595°C, which were introduced into AZ91. Experimental results indicated Al4C3 were in situ synthesis on the surface of SiCp by the reaction between SiCp and Al in 850°C, which could be as nucleant substrate for primary Mg during the solildification of magnesium alloys. This investigation provided a novel idea for grain refinement Mg-Al alloy.
Effect of Bonding Pressure on Transient Liquid Phase Bonding Joint Microstructure and Properties of T91/12Cr2MoWVTiB
Authors: Chen Si Jie , Guo Si Jing , Liang Feng
Published: March 2010

T91/12Cr2MoWVTiB was bonded by transient liquid phase bonding process with different pressures, one commercial FeNiCrSiB was used as the interlayer. The microstructure and components distribution of the bonded joints were examined by optical microscope and scanning electron microscopic techniques. Furthermore, the properties of the joints were also tested. The results indicate that with the increase of the pressure – from 2 MPa to 6 MPa – the microstructures and mechanical properties were improved, and more similar to those base alloys. A theoretical study also revealed that the isothermal solidification complication time can be shorter, because the maximum liquid width was reduced with the existence of pressure.
An Experimental Study of Metal Co-Injection Molding with Sequential Injection
Authors: He Hao , Li Yi Min , Zhang Jian Guang
Published: March 2010

An experimental study of co-injection molding which involves sequential injection of dissimilar metal feedstocks into a mold has been carried out. The effect of skin temperature and injection velocity on the material distribution of co-injection molded plates has been studied. It was found that the molding temperature was important in controlling skin-core distribution, while injection velocity seemed to play no significant role. The experimental results were analyzed by taking account of the relative viscosity of the two melts. It was demonstrated that the differences in rheological properties of the metal feedstocks involved are the primary variable determining the phase distribution of the molded parts.
Creep Damage Analysis of Powder Metallurgy Material with Inclusion
Authors: Cui Wei Hua , Zhang Wei Xiang , Xu Jie
Published: March 2010

In this study, numerical calculations of fatigue-creep interaction behavior for powder metallurgy materials with inclusion was carried out based on the Kachanov-Rabotnov damage law. The emphasis was placed on the influence of different fatigue cycle times and shape of inclusion on matrix damage for a constant of creep time. The results show that the creep damage law can be used to study the fatigue-creep interaction behavior of PM materials. And the creep damage increases with the fatigue cycle times increasing. The shape of inclusion remarkably influences the damage of matrix. Generally, elliptical inclusion causes much more damage to the matrix than the round inclusion.
Carbon Foams with High Compressive Strength Derived from Mixtures of Mesophase Pitch and Si Particles
Authors: Wang Yang Wei , Zhang Zhi Jin , Yu Xiao Dong , Wang Fu Chi , Li Kai , Luan Zhi Qiang
Published: March 2010

Carbon foam with relatively high compressive strength and high porosity was prepared from a mixture of mesophase pitch and Si particles by foaming and carbonization. The influence of Si content on the microstructures and properties of the carbon foam was studied. Results show that the pore number decreases and the strut thickness increases with an increasing of Si content. In addition, bulk density also increases with increasing Si content but the porosity decreases. Si addition to the mesophase pitch reduces the number of microcracks on the cell wall of the carbon foam remarkably which results in an increase of compressive strength for the carbon foams. Compressive strengths improve by 46%, 176% and 339% at Si additions of 30%, 40% and 50% (wt %), respectively. Carbon foam with a relatively high compressive strength of 24.6 MPa and a porosity of 61% are obtained when 50 wt% Si is added.
Synthesis of α-Al2O3 Platelets in Molten Salt for High Performance Ceramics
Authors: He Jia , Li Fang
Published: March 2010

α-Al2O3 platelets were successfully synthesized in molten NaCl-KCl salt using the pre-calcined Al(OH)3 powders as starting materials, and the effect of milling medium on the powder characteristics was investigated, with the purpose of obtaining high performance sintered ceramics. When anhydrous alcohol was used as milling medium, the synthesized product at 900°C was porous α-Al2O3 with a small amount of amorphous Al2O3. While deionized water was used, single-phase and dense α-Al2O3 platelets were developed at 900°C. It was related with different solubility of NaCl-KCl salt in anhydrous alcohol and deionized water during milling. When the synthesized α-Al2O3 platelets were used as seeds in sintered ceramics, fracture toughness was developed.
Research of Constitutive Relation of Metal Powder in High Velocity Compaction
Authors: Zheng Zou Shun , Zhu Yuan Peng , Xu Qin Wu , Qu Xuan Hui
Published: March 2010

Metal powders behave high strain rate, viscous effect and first hardening then softening deformation characteristics during the forming process of high velocity compaction. The characteristics of high strain rate and viscous effect are described by composite nonlinear viscoelastic body which consists of non-linear spring, linear spring and high strain rate Maxwell element. The deformation characteristics of first hardening then softening can be described by changing the degree of the term of nonlinear spring from greater than 1 to less than 1. Constitutive relation of metal powder in high velocity compaction is established. The degree of the term of nonlinear spring is considered as a function of strain. The function is approximated by linear, quadratic and cubic polynomial and the stress-strain curves are analyzed respectively. Analysis results indicate that the constitutive equation can describe the deformation characteristics of metal powder in high velocity compaction.