bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Conventional Domed Bursting Disc Material and Burst Pressure Test
Authors: Xu Wei Pu , Liu Yi Ting
Published: May 2013

A brief overview is given in the conventional domed bursting disc structure and manufacturing method. 316L stainless steel as a template is selected. With the investigation on bursting disc material tensile test method, the test results are summarized,also the burst results of disc burst pressure in different sizes. With the help of bursting disc material performance test and bursting disc burst pressure test of 316L , the test results provide a reference for other types of bursting disc.
Numerical Simulation of Stress-Strain of AZ31 Mg Alloy Profile during Warm Tension-Rotation Bending Process
Authors: Xiao Han , Wu Long Biao
Published: May 2013

The warm tension-rotation bending process of AZ31 Mg alloy profile was simulated. The distribution of stress and equivalent plastic strain of the profile during the bending process were analyzed. The results indicate that tangential stress of cross-section of profile from the inside to outside after bending is shown as "tensile-compression-tensile-compression", which is appeared as "N"-shaped. Equivalent plastic strain of the outside of profile is maximum, which is 0.132; the inside of profile is lower, which is 0.069; the middle of profile is minimum, which is 0.003.
Research on Key Processing Technology of Nuclear Power Tapered Cylinder Forging
Authors: Nie Shao Min , Yu Zhao Qing , Meng Dong Ning , Qi Rong Sheng , Liu Xin Gang , Jin Miao
Published: May 2013

AP1000 steam generator of nuclear power is an important equipment in the PWR nuclear power plant and the structure of its bi-straight tapered cylinder forging is complex, which increases forming difficultly. In this paper, forming process of bi-straight tapered cylinder forging is determinated by numerical simulation and physical experiment. Influence law of dimension parameters of blank and auxiliary of forging forming quality is studied by numerical simulation. The lead specimen forming physical experiment of ratio of 1:15 validates the feasibility of bi-straight tapered cylinder forging forming process and finds that the results of numerical simulation are agreed well with the physical experiment.
A Theoretical Model of Grinding Force and its Simulation
Authors: Qin De Lin , Wang Feng , Xi Fang Jian , Liu Zhi Feng
Published: May 2013

Aiming at the axle material 30CrMoA high speed cylindrical grinding force calculation problems, a consideration of plowing force grinding force model is established based on the Werner’s theory model of grinding force, and the friction force and plowing force coefficient is defined as variable parameters. On the basis of the finite element analysis software DEFORM-3D, a high speed cylindrical grinding simulation model method is presented.Through the theoretical value and simulation value contrast, a mutual authentication of grinding force model is proposed. According to the simulation analysis results of grinding force and grinding wheel speed, grinding depth and the relationship between the workpiece speed, theoretical and technical guidance for the grinding force calculation and the selection of grinding process parameters are provided.
Grinding Parameters Optimization of Stainless Steel Surface Based on Grey Relational Analysis
Authors: Chi Yu Lun , Li Hao Lin , Cao Hao Yang , Lin Xian Kun
Published: May 2013

The theory of grey systems has been used for performance prediction, relational analysis and decision making in many areas. In this paper, the grey relational analysis is applied to optimize the stainless steel cylindrical grinding parameters, and the corresponding grinding parameters are considered, such as spindle speed, feedrate, radial depth of grinding and workpiece speed. An orthogonal array was used for experiments design, and the surface roughness and the roundness were valued in the experiments. By analyzing the grey relational grade matrix, the most influential parameters could be selected. The results of confirmation experiments indicate that grey relational analysis can effectively acquire the optimal combination of grinding parameters.
Machining Simulation of Equal Base Circle Bevel Gear Using Disc Cutter
Authors: Wang Bin , Deng Xiao Zhong , Zhao You Liang , Zhang Bo
Published: May 2013

The purpose of this paper is achieve machining the equal base circle bevel gear with a disc cutter. Based on the equal base circle bevel gear theory, By solving coordinate values of the disk cutter section, made tool model in VERICUT environment. By planning disc cutter machining path , the disc cutter trajectory is obtained, simulated the NC machining to a equal base circle bevel gear using VERICUT software. The results show that machining this gear in NC machine can be realized using disk cutter.
Research on the Rock Breaking by Double Disc Cutter Test-Bed
Authors: Zhou Peng , Wang Chao , Gao Wei Xian , Wu Yu Hou
Published: May 2013

Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of tool systems is its main failure form. Rock hob test-bed is the only testing equipment for tool failure and wear. In this paper, the breaking rock by the double disc cutter is simulated and four kinds of rocks are selected to test the influece of rock characteristics and spacing between two disc cutters on the rock breaking by the double disc cutter test-bed. The results show that there is different optimal spacing between two disc cutters for different rock; the optimal spacing is inversely proportional to the hardness of the rocks; the maximum stress appears the boundary between the disc cutter and rock.
Study on Machinability of Pre-Hardened Plastic Mould Steel
Authors: Min Yong An , Yang Yi Ping , Zhang Zheng , Wu Yan , Wu Xiao Chun
Published: May 2013

The relationship between machinability and microstructure of plastic mould steel is still not clear enough, despite the application of plastic mould steel is more and more wide. In this study, two typical plastic mould steels, namely, 718 (DIN 1.2738) and SDP1 steel with the same hardness are chosen to investigate turning force, tool wear and milling force by experimental test. Combining with the turning and milling test, discussions about cutting force and the relationship between machinability and microstructure are made. And it’s found that the micro-uniformity has a great effect on the machinability of plastic mould steel.
Experimental Investigation of Effect of Gear Milling Parameters of Al-B4C Composite Gears on Surface Roughness
Authors: Smart D. S. Robinson , Varghese Praveen , George Li Jin
Published: May 2013

The gears which are being used in offshore applications are to be manufactured by using materials which are having heat resistance, corrosion resistance , high strength and with standing for higher fatigue loading. This research work deals with the experimental study and analysis of various parameters of gear milling process which would effects the microstructure and surface finish of gears. Analysis have been done on various cutting parameters during the gear cutting process of Aluminium boron carbide composites. The A6061 is reinforced with Boron carbide by using the stir casting process with 10 wt. % and 15 wt. % of B4C compositions .The experimental evaluation of effect of milling parameters on surface finish and microstructure are carried out for gear milling process by varying the feed,depth of cut and the corresponding cutting force, vibration and roughness during the machining of tooth have been measured.
Prediction of Surface Roughness on CNC Turning Based on Monitoring of Cutting Force and Cutting Temperature
Authors: Tangjitsitcharoen Somkiat
Published: May 2013

This paper presents the surface roughness model which is proposed and developed to predict the surface roughness in the CNC turning of the carbon steel with the coated carbide tool under various cutting conditions by using the response surface analysis with the Box-Behnken design based on the experimental results. The in-process monitoring of the cutting force and the cutting temperature is utilized to analyze the relation between the surface roughness and the cutting condition. The tool dynamometer and the infrared pyrometer are employed and installed on the turret of CNC turning machine to measure the in-process cutting force and cutting temperature. The models of cutting force ratio and cutting temperature are also developed based on the experimental data. The optimum cutting condition is determined referring to the minimum surface roughness of the surface plot, which is obtained from the developed surface roughness model. The experimental results show that the higher cutting speed gives the better surface roughness due to the higher cutting temperature, however the tool life becomes shorter. The feed rate is the most significant factor which affects the surface roughness, while a small depth of cut helps to improve the surface roughness. The effectiveness of the surface roughness prediction model has been proved by utilizing an analysis of variance (ANOVA) at 95% confident level. Hence, the surface roughness can be predicted and obtained easily referring to the developed surface roughness model.
The Implementation of Steelmaking MES for Pangang Group
Authors: Wu Jian Bing , Liu Ji Guang
Published: May 2013

This paper proposed significance and urgency of constructing steelmaking MES on analysing the informationization status of Pangang Group. And addressed the implementation of steelmaking MES for Pangang Group. The steelmaking MES adopted multi-tier architecture which included presentation layer, application server layer and data layer. The presentation layer mainly fulfilled user permission and display of GUI. Application server layer mainly fulfilled system function such as access control, data subscribe/publish, object mapping, database access, components management. Business logic on the application server executed storage management, plan management, process monitoring, actual production management and quality control etc. The implementation of this system significantly improved the management level of steel plant, optimized the productive process and reduced the production cost.
Influence of Reflow Soldering Process Parameters on the Lead-Free Reflow Profile
Authors: Liang Wan Lei , Guan Xiao Dan , Zhao Peng
Published: May 2013

Reflow soldering process parameters have distinct effect on the lead-free reflow profile and its key indicators. To determine the relationship between reflow soldering process parameters and lead-free reflow profile is significant for obtaining the correct reflow profile. The result of orthogonal experimental shows that the most influential factors of the change rate of heat-up RS are conveyor speed S, temperature set value of the heating zone 1 T1 and the temperature set value of heating zone 2 T2 in sequence; the most influential factors of the soaking time TS are conveyor speed S, the temperature set value of heating zone 4 T4 and the temperature set value of heating zone 2 T2 in sequence; the most influential factors of the reflow peak temperature PT are conveyor speed S, the temperature set value of heating zone 7 T7 and the temperature set value of heating zone 6 T6 in sequence; the most influential factors of the reflow time TAL are conveyor speed S and the temperature set value of heating zone 6 T6 in sequence.
Life-Cycle Energy Analysis as a Method for Welding Joint Design
Authors: Yu Wei Yuan , Xia Tian Dong , Ding Wan Wu , Wang Xiao Jun , Zhao Wen Jun
Published: May 2013

This paper briefly explains some of the theoretical issues associated with life-cycle energy analysis and then uses an Al-Cu dissimilar metals welding product case study to demonstrate its use in evaluating alternative design strategies for an energy efficient welding product. The energy consuming characteristic and the life-cycle model of welding product have been studied by the energy analysis method. The energy consumption model of welding product throughout life-cycle has been modelled. The energy properties of different welding method has been studied and described quantitatively by the energy analysis method of total life-cycle. The results show that an effective brazing technology is the key to improve the utilization ratio of energy.
Fracture Behavior of High-Frequency Welded Joints of GH4169 Alloy
Authors: Duan Xiao Xue , Zhang Yan Hua
Published: May 2013

The CTOD test was performed on Instron8801 servo hydraulic testing machine according to the GB/T 2358-94 standard at room temperature. Scanning microscopy was used for observation of the fracture surface of the test specimens and compared with general TIG welded joint. The results show that the average CTOD for high frequency TIG welded joints is lower than the average CTOD for TIG welded joints because of the decrease of the plastic portion of CTOD. The fracture characteristic of high frequency TIG welded joints is dendritic crystal fracture.
The Investigation on Wire Rod Materials of Low Carbon Steels and Extra Low Carbon Steels
Authors: Chung Ho Hua , Chen Tsong Hsin
Published: May 2013

In this study, three kinds of rolled wire rod materials constantly used on screws and bolts are concerned. The relation among mechanical properties, phase ratios, micro-structures and grain sizes is investigated on the wire materials of low carbon steels and extra low carbon steels. Also the Electron Microscope and Energy Spectrum analysis are applied to distinguish the type of Precipitation phase. The results are shown that the precipitation phase of titanium nitrides and titanium carbides exist in the extra low carbon steel so that the hardness ratio of the wire materials with extra low carbons after cold forming is higher than that of the wire materials with low carbons for around 10%. In addition, The wire rod materials with course ferrite grains mainly added by titanium elements in extra low carbon steels could be made as the wire materials for cold processing and it still kept good ductility not necessary to be softened under heat treatment. So in the research of function comparisons, to save cost expenses through cold forming without annealing process is expected.
The Welding Track Planning and Motion Control of T-Type Tube Autowelding Machine
Authors: Zhou Jian Ping , Yi Xin , Xu Yan , Zhang Chuan Yu , Liang Chu Hua
Published: May 2013

Combining with welding and numerical control technology, welding automation technology has brought the new development for welding equipment industry. This paper mainly aimed at automatic welding process needs for intersecting line of T-type tube, developed a practical automatic welding machine of T-type tube intersecting line, used the PCL893 movement control card as the core control unit, realized whole rotary feed of welding head and front and rear feed of the torch, etc. Integrating with mechanical cam and digital cam, the work achieved space fitting of saddle-shaped weld track so as to realize automatic welding process, imitate the manual welding process of space curve, reduce labor intensity, improve the efficiency of welding and quality.
Three-Dimensional Numerical Simulation of Temperature Field and Force Field of T-Type Turbe during Welding
Authors: Zhou Jian Ping , Zhang Xiang Feng , Liu Hong Sheng , Gao Jun Yi , Xu Yan
Published: May 2013

Residual stress affect the lifetime of weldments directly. Temperature Generated from the welding process is the major reason that influences the microstructure and mechanical properties of the metal weldments. Therefore it is necessary to simulate the temperature field for optimizing the structure of weldments. In this work the three-dimension finite element analysis software SYSWELS was used to simulate T-type tube, and carried on a detailed analysis of temperature field and residual stress in cool process of weld.
Influence of Fluctuation Frequency on Stress Corrosion Cracking of X70 Pipeline Steel Welding Joint
Authors: Sun Qi Lei , Shao Wei Wei , Wang Xing Gang , Wang Cheng Bei
Published: May 2013

Influence of the fluctuation frequency on stress corrosion cracking (SCC) behavior of X70 pipeline steel welding joint was studied in the cathode potential under nearly neutral medium by fluctuant slow strain rate test (F-SSRT). SCC sensitive parts occurs in overheated zone of X70 pipeline steel welding joint under cathode potential nearly neutral medium. SCC crack can be produced from the material surface micro holes and expanding their range up the main stress plane extension, when the load fluctuation frequency increases to a certain degree, SCC crack propagate along 45° maximum shear stress plane.
Application of Interactive Orthogonal Design on the Aerodynamic Drag Optimization of Hatchback Car
Authors: Yu Hao , Zhu Hui , Yang Zhi Gang
Published: May 2013

The interactive orthogonal design was employed to investigate the aerodynamic drag coefficient (CD) of hatchback car by using CFD methods. And the effects of back windshield angle, diffuser angle, front windshield angle, hood angle, side windshield angle and tail length were discussed. The results indicates that back windshield angle, diffuser angle and their interaction, hood angle and front windshield angle have notable effect on the CD of the model, while other parameters and interactions have no notable effect. The best CD conditions are: back windshield angle 20°/60°, diffuser angle 12°, front windshield angle 30°, hood angle 15° and tail length 4300mm.
Application of Reverse Engineering for Redesigning and Manufacturing of a Printer Spare Part
Authors: Buranský Ivan , Morovič Ladislav , Peterka Jozef
Published: May 2013

The paper deals with the application of Reverse Engineering (RE) in the process of redesigning and manufacturing of a printer spare part. The paper presents the devices for transfer of a damaged printer part into a digital model by non-contact three-dimensional (3D) digitization. The paper discusses the 3D computer-aided designing (CAD) of a model with CAD software based on a digitized real part. The paper presents two proposals for spare part manufacturing: a) manufacturing by computer numerical control (CNC) milling, which is projected and programmed in computer-aided manufacturing (CAM) software with regard to production potential of selected CNC machine tools; b) manufacturing by Rapid Prototyping (RP) technology. The article concludes with a comparison of the proposed methods of manufacturing of printer spare part in term of production time.
Finite Element Analysis of Sealing Structures for SF6 Gas Insulated Switchgear
Authors: Li Chun , Ying Feng , Zhao Hua
Published: May 2013

The sealing equipment of the SF6 GIS including the rubber O-ring and bolts were numerically simulated. Effects of bolts number, the tension moment of bolts, and gas pressure on contact stress and peak stress of O-ring were mainly studied. Simulated results showed that the bolts number and tension moment of bolts has a great effect on the sealing performance of mechanical seal and the maximum stress of O-ring. The higher contact pressure could be achieved under the condition of a larger bolts tension moment and bolts number and smaller gas pressure, but it also results in a reduce of life of O-ring.
The Optimal Design of Injection Mold Gate Based on CAE
Authors: Tang Jian Wen
Published: May 2013

In the injection molding process, CAE technology is used for detailed analysis of the designing of injection mold gate location and number, this method can optimize the pouring system, and change the traditional method which improves the mold structure by mold testing, so the cost of mold design and manufacturing can be reduced.
A Universal Feature Definition Frame for 3-D CAD Model Conversion
Authors: Sun Chang Le , Ning Da Yong , Xiong Wei , Wang Hai Tao
Published: May 2013

Data exchange between 3-D CAD systems has a very important research value both in theory and in application. This paper presents a general outline of a Universal Feature Definition (UFD) frame, which provides universal support for todays 3-D CAD systems. Through the medium of UFD feature, this frame can realize the conversion of 3-D CAD models from source system to target system according to API mapping. This CAD model conversion method may overcome the disadvantage of traditional geometric method that the target model is not editable. This frame also provides the conversion interface of user defined features, which is convenient for the user to customize the desired conversion process. The frame has been implemented between Catia and UG with successful results.
Four - Wheel Steering Vehicle Modeling and Simulation Based on ADAMS
Authors: Wang Wen Ting
Published: May 2013

Based on ADAMS CAR module, and the establishment of four - wheel steering vehicle virtual prototype model of the Motor Vehicles ( the WS ). Front and rear comer is proportional to the control strategy, the angle step experimental simulation model and simulation results are analyzed. The results showed that 4WS cars can improve low speed maneuverability and high speed stability, but high speed likely to increase driver fatigue strength.
Effect of Water Vapor on Oxidation of Ferritic Stainless Steel 21Cr-0.6Mo-Nb-Ti in Simulated Reheating Environment
Authors: Cheng Xia Wei , Jiang Zheng Yi , Wei Dong Bin , Hao Liang , Zhao Jing Wei , Peng Jian Guo , Lu Shu Zheng , Jiang Lei Zhu
Published: May 2013

High temperature oxidation of ferritic stainless steel 21Cr-0.6Mo-Nb-Ti was carried out isothermally at 1100 oC under different water vapour content conditions in an electrical furnace. Water vapour does accelerate the formation of oxide scale of stainless steel 21Cr-0.6Mo-Nb-Ti, however, it is not significant. Some oxide grains consist of spinel crystal structure, which should be spinel Manganese Chromite. In dry air atmosphere, the grain of the spinel is more and bigger than that in wet air. No breakaway oxidation occurs in the experiment indicating that 21Cr-0.6Mo-Nb-Ti has very high oxidation resistance, which might be contributed by the formation of MnCr2O4and compact protective chromia. In addition, continuous silica formed along and accumulated at the oxide metal interface performs like a diffusion barrier.
New Downhole Intelligent Throttling System Based on the Poppet Valve
Authors: Deng Cong Ying , He Ming Ge , Zhao Xiu Fen , Yin Guo Fu
Published: May 2013

A new downhole intelligent throttling system has been designed to adapt to the variable downhole environment for natural gas exploitation. The downhole intelligent throttling system consists of the throttling structure and the automatic control system. The throttling structure refers to the poppet valve and the existing downhole throttling valve. Its throttling principle is based on the theory that the changing flow area affects the pressure. The automatic control system consists of the downhole motor, downhole sensors, data transmission channel and the Industrial Personal Computer (IPC). Temperature and pressure are monitored by the downhole sensors. These data are transmitted to the IPC to process through the data transmission channel. The IPC sends signals to control the downhole motor to adjust the throttling structure in real time. The downhole flow field has been simulated by using the ANSYS analysis software. The results include the gas pressure, velocity and temperature. They s how that the throttling structure can get the required smaller and more stable outlet pressure at the different inlet pressure. It is a feasible fundamental part to establish the whole downhole intelligent throttling system.
Research on Three-Dimensional Topology Optimization for the Bed of NC Gear Shaper
Authors: Tian Qi Hua , Tao Ran , Du Yi Xian
Published: May 2013

Taking minimum compliance of the bed of YKS5120B-3 NC gear shaper as the optimization objective, and the three-dimensional finite element relative density as design variables, the three-dimensional topology optimization mathematical model is established based on the interpolation method of solid isotropic material. The optimality criteria algorithm is used to update design variables. Topology optimization design of loaded bed is conducted and the optimal bed material distribution in the design domain is obtained. The new geometric model of the bed is reconstructed according to the optimal bed material distribution. Comparing the static analyses results of original model of the bed with reconstructed model of the bed, the correctness and the validity of the proposed method is verified.
The Reliability Evaluation of Threaded Connections in Challenging Drilling by Three-Dimensional Finite Element Analysis
Authors: Chen Feng , Di Qin Feng , Wang Wen Chang , Zhu Wei Ping , Wang Ming Jie , Shen Zi Jun
Published: May 2013

The development of ultra-deep drilling and extended reach drilling present many critical challenges for the threaded connections. The reliability of threaded connections must be evaluated to ensure the structural and sealing integrity of drillstring in critical applications. Three-dimensional finite element analysis of threaded connections has been performed in this paper. Different types of loading composed of make-up torque, working torque, tension and bending loading are applied to the model. The makeup characteristics of threaded connections have been analyzed, and the reliability of threaded connections under severe conditions has been evaluated. The results show that von Mises stress distribution over threaded connections is highly uneven, tooth nearby two ends was bearing the most of load. It shows that ultra-deep drilling case is even more challenge than extend reach drilling case in the threaded connections, the reliability evaluation of threaded connections is important in those challenging drilling.
The Research of Deformation Compensation of the Unloading Mechanism of the Beam for XK-2535 Large-Scale CNC Gantry Milling Machine and Engineering Application
Authors: Chen Shui Sheng , Xu Xu , Hua Zhong Ping , Dai Chen
Published: May 2013

Through the FEM analysis of the unloading wheel and unloading beam in unloading mechanism of the beam by using ANSYS, we obtained the deformation curve of unloading beam under the worst working conditions. The deformation compensation method can be used to manufacture the unloading beam for purpose of improving the machining accuracy. The straightness of guide of beam is up to 0.01mm/1000mm. We obtained that the maximum deformation of unloading wheel was 17.6, the maximum stress was 55.8MPa and the maximum contact stress was 37.5MPa. In order to ensure the security of unloading wheel, the consistency of theoretical result and simulation result were verified by using Hertz contact theory.
Construction Method of Tool Path Based on Arc-Cell
Authors: Huang Dong Zhao , Zhao Qian Cheng , Yang Tian Long
Published: May 2013

Tool path is usually described by means of continuous small linear segments. It results in large number of programming points in order to achieve high precision. A construction method of tool path based on arc-cell is presented in this paper, and the tool path is G1 continuous. The construction method is applied to describe the tool path of wave shape specimen and hill shape specimen. For the two specimens, when their tool paths are described based on continuous small segments, 128212 and 184954 linear segments are necessary, respectively. But when their tool paths are described based on arc-cell, 15838 and 21669 arc-cells are necessary, respectively. And its more important that these arc-cells include information of curvatures and arc-lengths to control acceleration and deceleration.
Analysis on micro-/poly-Crystalline SiGe Alloy Solar Cells
Authors: Zhang Qiu Bo , Wei Wen Sheng , Shan Feng
Published: May 2013

Performance of micro-/poly-crystalline SiGe alloy solar cell of TCO/(n)a-Si:H/(i)a-Si/(p) c(pc)-SiGe/(p+)μc-Si/Al structure was analyzed via the AFORS-HET software. Cell structures can be designed to reach up to the optimal performance. Employment of back surface electric field layer of (p+)μc-Si could improve cell properties. The maximum photoelectric conversion efficiency η=21.48% occurs in a cell with average Ge percent content x0.1 and 250 m-thick Si1-xGex alloy light absorption layer, which is higher than the experimental result of the same absorption layer thickness crystalline Si HIT cell [Progress in Photovoltaics: Research and Applications, 8 (2000) 503.]. Temperature dependence of the cell performance parameters (open circuit voltage Voc, circuit current density Jsc, fill factor FF and efficiency η) indicates that Si0.9Ge0.1 cell shows weaker temperature sensitivity than that of pure Si cell. Numerical calculation illustrates that Voc decreases while Jsc, FF and η heighten with raising mean grain sizes and crystalline volume fractions, these variations with the later are more remarkable. Present optimized technique will be benefit to designing and fabricating the high performance solar cell.
Study on the Formability Rules with Precise Die Face for the Inner Clutch Shell of Automobile
Authors: Mebrahtu Beyene Gezae , Cai Yu Jun , Yu Qiang
Published: May 2013

The ultimate goal of the metal forming industry is to form components made of a specific material into a required shape without experiencing wrinkling, bifurcation and spring-back. This study is devoted to develop the whole process by making rules of precision for specific part geometry. For inner clutch shell a computer simulation system and the general procedure of dynamic simulation in sheet metal forming are presented. Finally compute all simulation results with reference to the original part property and recommend the appropriate process flow to produce the part, the comparison with tryout results shows that the formality simulation of thick panel with precise die face is reliable and accurate.
Effect of Insulators on the Power Consumption and the Oxygen Content of Si Ingots in Czochralski Growth
Authors: Shin Jong Sik , Choi Wang Ki , Kim Ki Young
Published: May 2013

The effect of insulators in a Czochralski furnace on the power consumption and the oxygen content in the melts as well as in the Si ingots was studied without considering a radiation shield. The top insulator showed better results than the other two insulators for the power consumption and Si melt temperature. The interface at the center of the melt descended in the all conditions of installing the insulators, and all interfaces were concave down. The oxygen content in the Si crystal decreased as the thickness of insulators was decreased for the top and top-side insulators, while increased for the bottom insulator.
Optimization Design for the Longitudinal Structure of LED Light Guide Plate Using Soft Computing
Authors: Chen Wen Chin , Liou Pen Hsi , Chen Bo Jui
Published: May 2013

The study proposes an optical optimal design system of light guide plate (LGP). The optimization design is conducted in the longitudinal structure of the LGP incidence plane with 3-piece LED light source. Taguchi method is also used in carrying out the design of experiment through the TracePro, optical analysis software, and the experiment data were employedd as the back-propagation neural network (BPNN) training and testing samples, and then created an optical quality predictor of the longitudinal structure; BPNN can predict the impact of incidence plane luminance versus the different constructed parameters. Finally, the optical quality predictor can effectively generate the optimal parameters settings combined with genetic algorithm (GA). The simulation results show that the proposed system improves the non-uniformity problem of the incidence plane but also makes it easier to design the longitudinal structure of the incidence plane.
Reaction Mechanism on Preperation of Ta with SOM Process
Authors: Chen Chao Yi , Lv Ying Lu , Li Jun Qi
Published: May 2013

Tantalum metal was prepared by Solid Oxygen-ion Conducting Membrane (SOM) technology from Ta2O5 directly in molten CaCl2. Through reaction mechanism of the metal-oxide-electrolyte three-phase interline (3PIs), the influence of pellets microstructure on the electrolysis process and products morphology were discussed. The results demonstrate that forming pressure, particle size and porosity of cathode pellets are significant factors for three-phase interline during electrolysis process. It was found that the big porosity and small particle can enhance the deoxidization rate, Contrarily, the compact out-layer of tantalum metal was formed. While the Ta2O5 pellet was pressed by 4MPa and sintered at 1150°C for 2 h has rational porosity and particle, the electrochemical reduction can be achieved via two steps: Ta2O5Ta2O5-xTa.
Single-Machine Scheduling to Minimize Makespan with Deterioration Jobs and Multi-Maintenance Activities
Authors: Hsu Chou Jung , Chen Hung Chi
Published: May 2013

This paper explored a single-machine scheduling deterioration jobs with multi-maintenance activities. The non-resumable case and simple linear deterioration effect were taken into account as well. We assumed that after a maintenance activity, the machine will revert to its initial condition and the deterioration effect will start anew. The objective was to minimize the makespan in the system. The problem was proven to be NP-hard in the strong sense. Therefore, a heuristic and a lower bound were introduced and tested numerically. Computational results showed that the proposed algorithm performed well.
The Modal Analysis for the Third Type of Internal Gear Motor
Authors: Zhang Jun , Tang Chun Ren , Tang Hong Mei , Li Xian Hua , Niu Meng Meng , Cai Qing Yang , Zhao Xian Wen , Zhang Bin
Published: May 2013

It is significant to study the dynamic characteristics of the mechanical system. In order to prevent accidents such as resonance and self-excited shock, modal analysis of the mechanical systems should be analyzed. The mode shape of gears was analyzed to improving the design security. The sleeve, the planet gears and the internal gear of the motor were simulated. All order natural frequency, the mode shape of the motor was obtained. Research shows that motor running is smooth when the frequency is less than 4230Hz.
The Roof Broken Mechanism of Fully Mechanized Coal Face with Super Thick and Loose Layer
Authors: Dong Guo Wei
Published: May 2013

In view of the study insufficient of the broken rule and mechanism and feature of coal face with super thick and loose layer that crushed coal face hydraulic support, The broken rule and mechanism and feature of coal face with super thick and loose layer in LONGDONG Mine are studied and the fracture development and abscission layer growth and caving characteristics in the process of are analysed by use of theoretical analysis and physical simulation experiment and numerical simulation analysis. The study comes to the conclusion that super thick and loose layer are with caving arch structure that are different from conventional roof broken feature.the broken mechanical model of super thick and loose layer are established and the coal face caving arch parameters of super thick and loose layer are determined by use of mining rock mechanics theory.
Energy Analysis and Optimization of Methyl Chlorosilane Separation
Authors: Duan Ji Hai , Mei Xin
Published: May 2013

The main problem of existing methyl chlorosilane separation process is high energy consumption and low products purity. Based on the column grand composite curve is established by Aspen Plus and combined with the process integration technology, a modification of the process is proposed to improve the energy efficiency. Compared with the original process, the total condense and reboiler duty decrease by 8.47%, 8.96% respectively.
A Coke Quality Prediction Model Based on Support Vector Machine
Authors: Chen Hong Jun , Bai Jin Feng
Published: May 2013

Due to the complexity of coking coal, as well as the mixed nature of some single coal procured, the error is significantly larger to predict coke quality only through coal conventional indicators. Thus the coking enterprises urgently need a coke prediction method using many blend coal-related data. In view of the complexity of coking, there are some limitations as to the regression prediction method and neural network learning methods. On the base of the conventional indicators of single coal and coal rock indicators, the paper utilizes support vector machine to predict the cold and hot strength of coke. The experiments show that the accurate prediction of this method can meet the requirements of enterprises.
The Failure Finite Element Analysis of Pump Collision with Valve in the Oil Well Pump
Authors: Wang Su Ling , Zhang Ying , Bai Nan Yang , Cai Yu Miao
Published: May 2013

The three element drive pump failure was the main reason to reduce inspection cycle of the pump. In this paper, a law of pump valve motion in one stroke was acquired through the establishment of the motion equations of the pump valve in the oil well pump, by making it as the pump valve boundary conditions and using ANSYS / LS-DYNA software, the stress state of the valve housing under the conditions of pump valve impact on the valve cover was analyzed, and as the calculation was shown, under the same conditions, the groove valve cover has the stronger impact than the extended grooved valve housing. The inspection cycle of groove valve housing was 457 days shorter than the extended grooved valve cover according to the theory of the fatigue life, therefore, the extended valve housing can effectively extend the check period.
The Modal Analysis of the Main Steel Structure of Bucket Wheel Stacker Reclaimer
Authors: Shang Peng , Hu Yao Zong , He Li Hu , Guan Yu Ming
Published: May 2013

The vibration mode of main steel structure of bucket wheel stacker reclaimer is complex and changeable, so its modal analysis is necessary. In this paper, the main steel structure of bucket wheel stacker reclaimer was integrally designed and its main parameters were determined. then the finite element model of the main steel structure of the bucket wheel stacker reclaimer was established and the modal analysis was simulated, finally the results of its inherent frequency were calculated by FEA method.
Design of Terraced Spinneret Based on Simulation of Electric Field Distribution in Electrospinning
Authors: Jiang Guo Jun , Zhang Sai
Published: May 2013

The low productivity of conventional single-needle electrospinning inhibits the application of nanofibers to a commercial level. In order to improve the productivity of the electrospinning technique, a terraced spinneret has been designed based on the finite element analysis in this paper. The electric field distribution was modeled with the use of Ansoft Maxwell software. The experiment results demonstrated this special design spinneret has the potential to produce smooth nanofibers on a large scale.
Micro Injection Molding and Strength Check of Polymer Micro-Needle
Authors: Xue Ling , Zhou Gang , Zhang Ya Jun , Zhuang Jian , Wu Da Ming
Published: May 2013

A kind of medicinal polymer needle array used for skin drug delivery is proposed in this paper. The structure design, ANSYS analysis, MOLDFLOW simulation and experiment are given. The structure of the micro-needle is that the needles are distributed on a thin-walled substrate. To study the strength of the micro-needle array, ANSYS software is used to check the axial and radial stress strength. The bending strength is improved by optimizing the micro-needle geometric structure. At the same time, in view of the polymer micro-needle array forming process, MOLDFLOW simulation software is used to research the effect that melt flow direction. The results show that the needle of the polymer melts in the micro-needle the cavities flowing along the axial direction is strong. Experiments were conducted to analyze the forming of micro-needle for different polymer, and a higher accuracy polymer micro-needle array is gotten.
Spectral Element Approximation for the Eigenvalue Problem of Hydrogen Atoms Electronic Structure
Authors: Han Jia Yu , Yang Yi Du
Published: May 2013

In this paper, the spectral element methods are adopted to solve the eigenvalue problem of hydrogen atoms electronic structure. A local refinement algorithm based on spectral element approximation is constructed to solve the problem on different domains. Numerical experiments indicate this algorithm is highly efficient.
Numerical Analysis of the Ultrasonic Honing Chatter Based on the Stribeck Model
Authors: Wang Jian Qing , Zhu Xi Jing
Published: May 2013

Chatter easily occurs in machining, which is influenced by many factors. The power ultrasonic vibration honing equipment is taken as the research object. The dynamic friction is studied and the dynamics model is established based on the Stribeck model. The describing function of the ultrasonic honing friction characteristics is calculated. The stability of ultrasonic honing nonlinear system is analyzed. The conditions are studied, on which chatter occurs. The expressions of chatter amplitude and frequency are given. The research provides the theoretical basis on which chatter can be effectively avoided when ultrasonic honing equipment is designed.
Optimizing BP Networks by Means of Genetic Algorithms in Quality of Laser Milling
Authors: Xu Zhao Mei , Hong Zong Hai , Yang Gang , Wang Qing An
Published: May 2013

Artificial neural networks were introduced in the area of laser milling. The prediction model of surface quality in laser milling parts, including the width, depth of cladding layer, was proposed based on the back propagation (BP) neural networks. The model combined the global optimization searching performance of the genetic algorithm and the localization of the back propagation (BP) neural networks. Five technical parameters were selected to test the reliability of the model. The simulation and experimental results show that the evolutionary neural network based on genetic algorithm can effectively overcome the problem of falling into local minimum point. This method can get higher accuracy of prediction. It improves the measurement precision with the maximum relative error 2. 21% between the predicted content and the real value.
Study on a New Type Massage Device
Authors: Yu Shun Nian , Yang Qin Cheng
Published: May 2013

The new type massage device designed is composed of gearing with groove cam mechanism, executive links with double-rocker mechanism, rate adjustment device with bolts, slider and compression springs. The device, which can simulate massage to remove fatigue by adding functions such as heating and magnetic, has broad application prospects. Structures of the massage device, kinematic analysis and the dynamic simulation have been introduced and the parameters on the effect of massage range have been studied in this paper. A prototype device has been made according to the results of the study. It has good massage effect.
Research on Material Selection and Sizes Optimization of Casing Material for Fracturing Wells under Existence of Brine Corrosion
Authors: Li Ling Feng
Published: May 2013

The designing level of material selection and sizes optimization of casing material for fracturing wells under existence of brine corrosion play a key role in the expected production target to fracturing wells. This paper introduces the effect of brine corrosion on casing material, material selection of tubing and casing for fracturing wells and proposes the optimization idea and technique of tubing sizes selection. By application, the study above has a good practicality.
Metallogenic Geological Characteristics and Metallogenic Model of Xiachen-Wangchangmu Fluorite Mine in Tiantai Basin, Zhejiang Province, China
Authors: Zou Hao , Xu Zhan Zhang , Fang Yi , Zhang Peng
Published: May 2013

Based on the field geological survey and the previous correlational studies, remote sensing interpretation and field geological survey methods are combined and used in this study. The mineral field geological characteristics, ore body geological characteristics, wall-rock alternation and metallogenic model were analysized and summarized in the XiaChen-WangChangMu fluorite mine in TianTai basin, which is a cretaceous inherited-transition basin that has the advantageous environment riched in fluorite. The main ore-bodies are lenticular or vein-like, and the general strike of ore-body is NW trending, while the dip slip is NE or SW, lateral plunging direction mainly from northwest to southeast. The supposed ore forming process in this area is as follows: atmosphere precipitation seeps into the fracture and pores in the rock. Heated by geothermy or other heat sources, the fluoride were leached out continuously; the ore-forming fluids rise along the ore-controlling fracture during the metallogenic stage as the environment change. SiO2 is the first mineral to be precipitated, then the fluids turn from acid into weak acid, and the fluorite begins to crystallize and form the main ore body, with carbonation symbolizing the end of the mineralization.
Synthesis Method and its Influence Factors of Hydrotalcite-Like Compounds
Authors: Xue Hong Dan , Wang Fu Li , Li Guo Li , Liu Pu , Bai Yong Qing , Wang Ke
Published: May 2013

Hydrotalcite-like compounds are a class of anionic lays or layed double hydroxiods (LDHs) which consists of alkalescence, anion-exchanges and memory effect. The synthetic methods of LDHs include coprecipitation, hydrothermal synthesis, mirowave radiation, ion exchange, sol-gel method, roasting reduction method, instant synthesis, etc.The molar ratio of raw materials, pH value,reaction temperature,reaction time and so on have a greater impact on the purity and crystallinity of the LDHs.
Mine Laneway Modeling and Realization Based on the Matlab
Authors: Chen Ling Xia , Zhao Min Ning
Published: May 2013

In view of the request of 3D visualization on mine laneway, according to traverse measurement data and profile data, by use of triangulated irregular network, the shortest dagonal method and the adjacent feature points to pace method ,using Matlab language, the 3D laneway body were established. The result shows that the method is feasible and has a simple and fast reconstruction method.
Influence of Temperature on Carbonation Pellet for Ferrous Dust
Authors: Shi Yan , Li Xiao Jun , Hu Chang Qing
Published: May 2013

In a certain reaction time, CO2 concentration and flow rate, the carbonation experiment was carried out about green pellets prepared by the ferrous dust and active lime with 15%, 20%, 25%, 30% CaO content ratio respectively. The conversion ratio, porosity and compressive strength of carbonation pellets were analyzed at 200°C, 400°C, 600°C, 800°C.The results show that, with the reaction temperature increasing, CaO conversion ratio of carbonation reaction and the compressive strength increased, and the porosity decreased significantly; when the reaction temperature is 800°C, the CaO conversion ratio of reaction with 25% CaO content pellet can reach 47.26%, these can make the carbonation pellet to achieve a better carbonation degree and quality.
Step Reactive Sintering of Ti2AlNb Based Alloy with Element Powders
Authors: Wang Yuan Xin , Zhang Kai Feng , Zhen Lu
Published: May 2013

As a new effort, combined reactive sintering with hot pressing technique, the Ti-22Al-25Nb alloy was successful prepared with element mixed powders. Meanwhile, the reactive sintering was divided into two temperature ranges, which were at 873 K and 1373 K, respectively. The starting sintering kept 1h at 873K, and then the temperature was increased to 1373K, keeping 2h. The orthorhombic (Ti2AlNb) phase was observed in this sintered alloy. Moreover, the homogenization treat was conducted at 1473 K for 2h after the final sintering was accomplished, and the fraction of the orthorhombic phase increased significantly. The microstructures and the phases were analyzed. And the generation mechanism of the orthorhombic phase was also analyzed.