bluuebunny/crossref_metadata_2025 huggingface dataset:
Vacuum Brazing of Copper Tubes Using Ag-Cu Filler
Authors: Li Rui Feng , Shi Zhong Xing , Qi Kai , Wu Ming Fang
Published: May 2013

Joining of copper tubes using Ag-Cu filler has been carried out by vacuum brazing technology. The microstructure and mechanical property of brazed joints were studied by means of metallography, optical microscope (OM) and universal tensile test machine. Experimental results show that failure occurs in the base metal and the tensile strength can reach 179 MPa. The optimal vacuum brazing parameters are: brazing temperature 820 °C, vacuum level 10-3Pa and holding time 5 min.
Research for Viscoplastic Behaviors of SAC405 Pb-Free Solder
Authors: Li Ying Mei , Zhao Tian Yu , Liu Jun , Huang Bao Zong
Published: May 2013

Aiming at Pbfree solder Sn4.0Ag0.5Cu (in short, SAC405), the uniaxial tensile tests are accomplished with constant strain-rate under different temperature and strain-rate load conditions. The elastic-viscoplastic behaviors of SAC405 solders are studied. The rate-dependent material main properties are analyzed, such ad yield limit, tensile strength, saturation stress, etc. Partitioned constitutive model is accepted to describe the constitutive behavior of SAC405 solder. The seven parameters in partitioned model are determined by experiment data. The results of numerical simulation are fitted with the experimental values.
A New Method for Minimizing Cogging Torque in Permanent Magnet Machines Using Genetic Algorithm
Authors: Shangguan Jing Shi , Fan Cheng Zhi
Published: May 2013

Cogging torque is one of the main reasons which cause ripple in motor's speed and torque. So the reduction of cogging torque must be considered in the design of permanent magnet machines. This paper presents a new method for cogging torque minimization by optimizing pole-arcs combined with varying the thickness in magnets. With the combination of different pole-arcs of each PM slice to achieve the minimum cogging torque while without being harmful to the average torque. Thus, optimize the offset value which varies the thickness of magnets to further reduce the amplitude of cogging torque. In this paper, it used genetic algorithm (GA) to optimize pole-arcs and magnet offset on the basis of Finite Element Method (FEM).
Experimental and Numerical Study of Railway Ballast Compactness during Tamping Process
Authors: Zhou Tao Yong , Hu Bin , Yan Bo , Sun Jun Feng
Published: May 2013

Railway ballast tamping operations is employed in order to restore the geometry of railway track distorted by train traffics. The main goal is to compact the stone ballast under the sleepers supporting the railway squeezing and vibrations. The ballast compactness is the most direct index for evaluating the effect of tamping operation. This paper presents an experimental method used to detect the railway ballast compactness before and after tamping operation based on water-filling method, and creates a discrete element analysis model of railway ballast which analyzes the change of ballast compactness before and after tamping operation based on discrete element method. The simulation results are very similar with experimental results, which verify that the discrete element method is an effective method to evaluate the change of railway ballast compactness during tamping process.
Finite Element Analysis of Light Cargo Van Frame
Authors: Zhou Jin , Min Ling Qiang , Yang Zhong Sheng
Published: May 2013

Frame of the van is the basis for mounting of the other assemblies, by sustaining the various kinds of force and load from the road and the weight, so the strength and stiffness of the frame is the very important on the overall design of the van. This thesis does an analysis and research in accordance with ANSYS, discussing the frames static strength of the warp working status and the torsion working status, and doing an analysis of stiffness. The result of analysis shows that the frames ultimate stress is lower than the ultimate strength of material, satisfy the design demand. But the strength of material is overall higher, so the economic efficiency is low. This thesis is also provided the parameter for the nest step design of stress centralization areas and unreasonable design structure.
Hand Sketching in 3D Computer Animation Model Rendering and Editing
Authors: Zhao Zheng Fa
Published: May 2013

With The high development of science and technology, computer hardware and auxiliary technologies have a major influence on 3D animation; As for hand-painted interactively assistive technology, which also should be applied to 3D animation combined with better elements of science and technology. Hand sketching gathers the advantage of pen-paper and computer so that the model rendering will be more quickly, at the same time, to get the efficiency of editing more grid details and provide a basis for creating the internal structure and local details of the complex model; to improve the model quality by algorithm and surface structure for drawing and editing. Meanwhile, hand-painted model rendering and editing in the animation design development trend is worthy of attention as well.
Numerical Simulation and Optimization of Steel Pipe Cathodic Protection under the Condition of 3.5% Brine
Authors: Zhang Ming , Zhao Juan , Zou Lv Long , Wang Gui
Published: May 2013

This paper create a numerical model of potential distribution on the carbon steel pipe in seawater,and use the COMSOL to numerically calculate the potential distribution, and then studies the factors, anode location, quantity, size and medium conductivity etc, which influent potential distribution of cathodic protection.Meanwhile,the paper take a method which through the orthogonal array parameters scanning to determine the best protection scheme about anode location, number,and size,which provide the academic support for engineering practice.
Surface Extension in Smoothing of Class a Surfaces for Auto-Body
Authors: Xu Jia Chuan , Fan Ping Ping , Song Zeng Xiang , Zheng Wei Cheng
Published: May 2013

In smoothing of Class A surfaces for auto-body, the whole surface is firstly divided into many base surfaces, and then blended them into a whole surface. The base surface is often not big enough to meet the blending requirements, so it should be extended. The paper discussed the extension of Bézier curves and surfaces, and analyzed the relationships between extended curves/surfaces and vertexes. The result shows that the arrangement of control vertexes is closely related to the quality of extended curves/surfaces.
A Parting Surface Design of Multi-Cavity Mold Based on Pro/E Surface Technique
Authors: Huang Jun Gang , Li Chang You
Published: May 2013

Parting surface design is the key to mold design. Taking mold design of a component as an example, this paper introduces the implementation of a parting surface design of complex multi-cavity mold supported by the surface technique of Pro/E software.
Air Flow Field and Fiber Motion in a Swirl Die Melt-Blowing Process
Authors: Xie Sheng , Zheng Yuan Sheng , Zeng Yong Chun
Published: May 2013

Melt blowing is an important process for producing nanofibrous nonwovens. Compared to another technology for producing nanofibrous nonwovens, electrospinning, melt blowing applies high-speed air flow field to attenuate the extruded polymer jet. In this study, the air flow field of a swirl die melt-blowing process was simulated by CFD software, Fluent 6.3. The swirling air profile was shown. Meanwhile, a high-speed camera was used to capture the fiber path below a single-orifice melt-blowing swirl die. The spiral motion of the fiber was revealed. The relationship between the fiber path and the air flow field was discussed. This paper shows the relationship between the fiber path and the air flow field in a swirl die melt-blowing process.
Effects of Structural Parameters on Nanofiber from a Multihole Electrospinning Setup
Authors: Zheng Yuan Sheng , Xie Sheng , Zeng Yong Chun
Published: May 2013

To meet a high production requirement and high quality of nanofiber, a new disgned multihole spinneret with equilateral hexagon hole array of is used in this paper. We study the effects of two structural parameters of the multihole system on fiber diameter and fiber mats. 3D electric fields were simulated to understand the effects of electric field distribution on electrospinning performance. This study shows that fine and uniform fibers, as well as concentrated and uniform fiber mat can be obtained by this multihole electrospinning system at a high production rate.
Optimal Production LineLayout Model Based on Integer Programming
Authors: Zhao Yong , Pan Xiao Yong , Li Chun Chuan , Yao Guo Hong , Wu Jiang , Fu Xin , Lai Dong , Li Dong , Zhang Quan Wei
Published: May 2013

To control the cost and optimize the resource utilization of enterprises, production layout problem draws recently more and more attention by industries; however, a study on this problem indicates there is a lack of research on production line design, which is a major issue in the layout problem. Traditional methodology mainly depends on the designer’s experience and calls for theory analysis and quantitative study. This paper concerns the development of a multi-stage integer programming model to describe the production line layout problem, and employs a heuristic and ant-colony algorithm to solve the problem. A practical example illustrates the effectiveness of the model.
Simulation of the Nozzle Electro-Hydraulic Servo Valve with ITI-SimulationX
Authors: Jiang En Qiao , Wang Shu Han , Du Jing Ke , Xu Xiang Yang , Li Wen Yong
Published: May 2013

The structure and principle of the nozzle electro-hydraulic servo valve was introduced, and the complicated characteristics of mechanical, electrical, hydraulic, and magnetic are studied in this paper. The model of the nozzle electro-hydraulic servo valve was built based on the ITI-SimulationX software platform. The static and dynamic simulation processes were presented and analyzed regarding the nozzle electro-hydraulic servo valve. The nozzle electro-hydraulic servo valve has some advantages of rapid time respond, high stability and reliability. This paper shows the special capabilities of SimlationX to develop such a multi-domain model.
The FEA and Optimal Design of the Loader Based on Virtual Prototyping
Authors: Xu Yong
Published: May 2013

Virtual prototype technology is an advanced design methods, introducing the virtual prototype technology into the development of the loader, realized three-dimensional modeling and the FEA of the loader based on pro/E, it help us enhance the design quality and level of the loader.
Design and Simulation of Rinsing Equipment of Cable Rolling Wire Rope
Authors: Wang Peng , Wang Hui , Jiang Jia Yin
Published: May 2013

Removal of wire rope surface sludge is a labor-intensive and time-consuming process. Currently, the work has not been solved. In this paper, we study the development of a wire rope surface sludge removing equipment, a water jet semi-automatic control system. In this paper, we analyze the characteristics of wire rope surface sludge and study the injection pressure of water. Moreover, we design two schemes and perform simulation tests by FLUENT to find out the best injection conditions, such as the injection pressure, injection angle, injection distance and the type of spray nozzle. Finally, we get injection pressure 2.0, injection angle 70, injection distance 50mm and fan-shaped spray nozzle.
Effect of High Frequency Electromagnetic Fields on Liquid Steel in Soft-Contact Mold
Authors: Wang Xing Juan , Liu Ran , Zhu Li Guang
Published: May 2013

Using finite element method, the molten steel flow process in soft-contact electromagnetic continuous casting mold is simulated. The results show that the molten steel surface were affected by the electromagnetic force and shrink to the centre, near meniscus zone the flow velocity of steel increases and appears an obvious circumfluence, a large number of inclusion float and are absorbed by flux; on the other hand, the turbulent kinetic energy significant increases in circumfluence area, this exacerbates the reaction between flux and liquid steel, the initial size of the solidification organization are refined, and the surface quality of slab are enhanced.
Experimental Research on Size Effect of Magnetic Hysteresis Loop for Q235 Steel
Authors: Li Ai Guo , Zhao Jun Hai , Xiong Er Gang
Published: May 2013

The magnetic hysteresis loop is a significant performance of ferromagnetic material. The different-size specimens were fabricated and studied on the basis of magnetomechanical coupling tests. The curve of relationship between model size and magnetization intensity is obtained and hysteretic curve is described in the different conditions. The results indicate that the influencing law is reflected based on size effect of model specimens and performance of magnetic hysteresis and magnetization intensity. The results indicate that the size of Q235 steel model specimens is considerably influential in the magnetic hysteresis loop and magnetization, which accounts for an evident size effect.
Solute Distribution Ahead of Interface during Heteroepitaxial Growth
Authors: Yao Wen Jing , Jin Zeng Jia , Wang Nan , Lee Jeh Yun
Published: May 2013

By establishing a diffusion model, the solute distribution is investigated during the growth of eutectic phase from the binary melt on the primary phase. Based on the eutectic reaction conditions, reasonable assumptions are carried out to build the partial differential equation. After the determination of the initial and boundary conditions, the analytical solutions have been derived from the method of variables separation. The solute distribution ahead of interface and the influence of this distribution on the growth rate of heteroepitaxial phase are discussed.
The Effect of Damping Block Design on Stability of Ploymer Coextrusion Process
Authors: Zhang He Rui , Liu Xiao Feng , Zhang Bing
Published: May 2013

As final component of coextrusion system in polymer industry to produce product with multi-layer different materials, the coextrusion-die can be regarded as the most important determinant that can influence product quality directly. For design of die-cave that can make uniform pressure and speed distribution for different materials, geometry structure of die-cave and rheology performances of materials must be taken into consideration. In order to reduce the influence of operation uncertainty of polymer extrusion, damping block can be used to make adjustment for flowing speed of different materials. In this paper, a finite element method based simulation is made to analyze the impact of the damping-block to the uniformity of coextrusion flowing. With the simulation result, control methods for coextrusion quality are discussed for damping-block design and operation condition settings.
Theoretical Analysis on Manufacturing Hypoid Left-Hand Gears by Generating-Line Method
Authors: Yu Li Juan , Yang Zhao Jun , Li Xu Peng
Published: May 2013

According to the hypoid gear tooth surface forming principle, a generating-line will be formed in round-plane while a cone and its tangent circle plane do pure rolling, and the hypoid gear is cutting according to the motion equation as hypoid gears generating-line. to tools shape. The milling processing equation of the hypoid left-hand gear tooth surface on the right side gear tooth surface and on the left side gear tooth surface.There are a detailed description of the adjusting-tool , cutting out from ends, dividing, cycle cutting the whole process. The above method can realizes hypoid gearwheel right tooth surface processing.
Design and Analysis of a CFRP Drive Shaft
Authors: Zhang Guo Liang , Zhou Zu De , Zhang Jin Guang , Hu Ye Fa , Gong Jing Wen
Published: May 2013

According to the requirements of drive shaft, finite element analysis software SAMCEF was adopted in the simulation analysis of Carbon Fiber Reinforced Plastic (CFRP) tube which was the main structure of a CFRP drive shaft, in order to determine the parameters such as fiber orientation angles, number of plies, percentages of fiber with different angles, and stacking sequences. In this paper, the joint between CFRP tube and metal parts was designed. Specimens were manufactured and experiments were carried out. In conclusion, the results of experiments suggested that the simulation analysis predicted well the performances of the designed drive shaft.
Numerical Investigation for Fracture Saturation in Multilayer Sedimentary Rock in Unsymmetrical Case
Authors: Han Feng Shan , Song Li
Published: May 2013

Opening mode fractures in multilayer sedimentary rock often are periodically distributed with fracture spacing scaled to the thickness of the fractured layer. In this paper, based on Rock Failure Process Analysis Code RFPA2D, a three layer model with a central layer and with the different thickness top and bottom layer, progressive formation in multilayer sedimentary rock at fracture saturation in unsymmetrical case is simulated. We investigate the change of the critical fracture spacing to layer thickness ratio as a function of the thickness of the top layer where the bottom layers is much thicker (5 times) than the fractured layer called the unsymmetrical case, in this unsymmetrical case, fracture saturation is simulated. By numerical simulation of RFPA2D, the critical spacing to layer thickness ratio decreases and tend to the same constant value as the thickness of the top layer increases. Numerical simulation shown that for the unsymmetrical case, if the adjacent layers are thicker than 1.5 times the thickness of the fractured layer, the multilayer sedimentary rock can be treated approximately as a system with infinitely thick top and bottom layers at fracture saturation.That should be useful in the design of engineering systems and in the prediction of fracture spacing in hydrocarbon reservoirs and groundwater aquifers.
The Preventing Coal and Gas Outburst Technology of Middle Distance and Low Permeability and Upper Protective Layer
Authors: Dong Guo Wei
Published: May 2013

Protective layer mining is the main regional measures for control coal and gas outburst . According to the defects of the preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer in western Shuicheng mining area, the coal seams coal and gas outburst original danger are analyzed and protective layer is choosed initially using gas geological theory,the choice upper protective layer feasibility is analyzed using protection layer theory. the preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer control effect is studied by numerical simulation and spot investigation. The conclusions from this research：the preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer can decrease coal and gas outburst prediction index and control coal and gas outburst; the coal seams coal and gas outburst original danger can be preliminarily evaluated and the evaluation result can provide the basis for protective layer choice; the preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer can be applied in western marine-continental transitional facies coal measure strata.
The Main Structure Design and Motion Simulation of Spreaders Based on Virtual Prototype Technology
Authors: Shang Peng , Hu Yao Zong , Yan Xiao Yang , Guan Yu Ming
Published: May 2013

In order to simply the design process and reduce the cost, a virtual prototype of spreader was built in this paper, which was used to simulate the operating condition of spreader in the open coal mine. Then the method of test and verification in engineering application is put forward. Finally, it obtains the parameters of system model of spreaders that satisfy the requirements in actual operating condition by analyzing the test results. The results indicate that the virtual prototype could simulate the real condition and provide exact data for the stable operation and maintenance of spreaders.
Finite Element Model and Bending for Marine Composite Flexible Pipes
Authors: Wang Man , Bai Rui Xiang , Zhou Mao Jun
Published: May 2013

The parameterizationmodeling of typical composite flexible pipe is studied by ANSYS two-developmentlanguage APDL, which established the model building of the spiral self-lockinglayer and scanning division meshes. The stress response of the typicalfive-layer composite flexible pipe was calculated under bending load byadopting the no slip assumptions. It is easy to modify the parameters offlexible pipe structure by using the parameterization modeling. Theparameterization modeling can be used for the optimal design of flexible pipe.
Optimization and Improvement of Pile and Pull Coefficient Mathematical Model for Trapezoidal Stainless Steel Sieve Bar
Authors: Pan Lu , Wang Ya Qin , Wang Jian Jun , Sun Bin
Published: May 2013

To improve the controlling accuracy of pile and pull conditions in tandem rolling progress, relations between filling coefficient and pile and pull coefficient were proposed, and improved pile and pull coefficient mathematical model was obtained. To verify mathematical model, 4-stands trapezoidal stainless steel sieve bar three-dimensional finite element model was established and simulated by ANSYS/LS-DYNA. Parameters, such as filling coefficient, forward slip coefficient, pile and pull coefficient, were obtained. Compared with traditional mathematical model, improved mathematical model reflects the actual pile and pull conditions, and provides a reference for new product pass design optimization and improvement.
Modeling and Analysis of the Scavenging System for a Two-Stroke Cycle Hydraulic Free Piston Engine
Authors: Yu Ying Xiao , Yuan Zhao Cheng , Ma Jia Yi , Li Peng
Published: May 2013

A prototype of hydraulic free piston engine (HFPE) is being designed and constructed by Jilin University to achieve direct hydraulic wheel-drive and replace the current hydraulic drivers. This paper is aimed at modeling and analyzing the scavenging system for the HFPE. Based on the prototype engine E150, two stroke scavenging system for HFPE has been designed by analogy, the gas flow of HFPE during the scavenging process is simulated by using the commercial CFD software AVL FIRE. So some key scavenging parameters and flow field were obtained, the simulated results indicate that scavenging efficiency of loop scavenging system can meet the design requirement, it lies between perfect displacement and perfect mixing scavenging, and keeps decreasing while the operation frequency keeps increasing.
The Effect and Analysis of the Crankshaft Journal Fillet Rolling for Runout
Authors: Zhao Pei Feng , Zhang Yi Wen
Published: May 2013

Comparing with the characteristic of the two materials using on the crankshaft firstly, list their advantages and disadvantages; Secondly,expounding the effect of the crankshaft journal fillet rolling for radial runout, and apply HyperMesh、ANSYS and processing data to analyze and verify, thus drawing a estimated mathematical formula that solve for optimal rolling force on the basis of the depth of rolled hardened layer; According to the actual processing data and the optimal rolling force, proposing the improved crankshaft journal radial runout distribution,Then verify the feasibility of the estimated mathematical formula; The final result plays a a positive role to that reduce the processing costs of crankshaft and improve the crankshaft life.
High-Temperature Dry Sliding Friction and Wear Characteristics of As-Cast SiCP/A356 Composite
Authors: Jin Yun Xun , Wang Xiao Ya , Tong Qiang Qiang , Chen Hong Mei , Lee Jung Moo
Published: May 2013

The influence of temperature on the dry sliding wear behavior of as-cast SiCp/A356 composite under 150r/min, 6N and 30 min has been illustrated in this paper. The results reveal that the wear rate is very sensitive to the change of temperature and it exhibits lower wear rate at the range from 100°C to 200°C. However, the wear rate increases linearly due to adhesive wear operating a long duration at 250°C. The friction stability decreases sharply with the temperature raising. Formation of continuous grooves and some damaged regions are presented on the worn surfaces of the samples at lower and intermediate temperature. Parallel lips (wave like material flow) along the sliding direction are observed at higher temperature of the sample. The wear mechanisms involve an initial oxidative wear regime and spalling wear regime for a long duration and followed by an adhesive wear regime as the temperature raising.
The Damage Evolution of the Flange Repaired Reinforcement Laminates
Authors: Wang Yi , Chen Xiao Xia , Jiang Zhi Qiang
Published: May 2013

The Finite Element Model (FEM) study of the flange repaired cut-out laminates were carried out in this work. The FEM studies on the reinforcement and unrepaired structure is focused on simulation of the tensile test, damage evolution and the predicted failure loading. The test results indicated that the strain value decreased as the size of load is. The simulation results show that the tensile strength of the reinforcement is larger than that is unrepaired. Compared the results of damage evolution with four kinds damage criterion, the major failure model is matrix cracking under transverse tension appeared in the layers.
The Research on Dynamic Simulation of Rods and Cones Type Docking Mechanism
Authors: Zhang Jing , Liu Chang Jie , Yu Yang Tao
Published: May 2013

According space track-service technology，the dynamic virtual prototype has be built，using ADAMS-Viewsoftware for the rods and cones type docking mechanism. And focusing on the key influencing parameters we have finished dynamics analysis.
A New Operational Pattern Optimization Method and Its Application in Nonferrous Metallurgy
Authors: Wu Tie Bin , Cheng Yun , Zhu Hong Qiu , Li Yong Gang , Hu Zhi Kun
Published: May 2013

Considering the difficulties of optimizing the operational parameters of the nonferrous metallurgical process, a new operational pattern optimization method is proposed, which introduces product quality and energy consumption index. Principle Component Analysis (PCA) is used to simplify the operational patterns, reduces the data dimension and overcomes the low efficiency of the operational patterns caused by huge pattern database. After the attribute reduction of PCA, the weighted attribute coefficient of the new variable is solved and a new hybrid similarity calculation method is presented, which greatly improves the speed and accuracy of pattern matching. When the pattern is reused, each matched pattern weight can be identified according to the energy consumption, which is helpful to lower the energy consumption of the nonferrous metallurgical process. Simulated experiments are carried out in terms of the real production data. The Simulated results indicate that this novel method is a promising and effective technology to be applied to the real industrial process to reduce the zinc dust consumption and increase the qualified rate of the outlet cobalt ions.
Abrasive-Free Polishing of Hard Disk Substrate with H2O2-K2S2O8-NaHSO3 Slurry
Authors: Zhang Wei Tao , Lei Hong
Published: May 2013

The effect of potassium peroxydisulfate-sodium hydrogensulfite (K2S2O8- NaHSO3) as an initiator system in H2O2 –based slurry for the abrasive-free polishing (AFP) of hard disk substrate was investigated. The polishing experimental results showed that the H2O2-K2S2O8-NaHSO3 slurry had ten times higher material removal rate (MRR) than the H2O2 slurry in AFP of the hard disk. Further, the polishing mechanism of H2O2-K2S2O8-NaHSO3 slurry was investigated. Compared with the H2O2 slurry, electron spin-resonance spectroscopy (EPR) analysis showed that the H2O2-K2S2O8-NaHSO3 slurry provides twenty times higher concentration of hydroxyl free radical. Potentiodynamic polarization measurement showed that the corrosion current of disk substrate in the H2O2-K2S2O8-NaHSO3 slurry is larger than that in the H2O2 slurry. The results imply that K2S2O8-NaHSO3 as an initiator system for H2O2–based slurry has application prospects in abrasive-free polishing.
Aspherical Surface Contact Detection Error Analysis
Authors: Xu Hai Hua , Zhang Yu , Xia Xiao Guang , Wang Zi Wei
Published: May 2013

Aspheric detection technology has always been the key factor which affects the further enhance of aspheric precision manufacturing. Without high-precision detection methods and instruments to fit processing accuracy, aspherical precision machining and ultra-precision machining is difficult to achieve. A contact measurement of aspheric surface detection technology and its error analysis are mainly introduced in this paper, and testing equipment is the UK Taylor Hubson profilometer with instrument precision 0.2μm and measure the caliber 200mm.
Influence of Fiber’s Surface State on Mechanical Properties and Fiber-Matrix Interaction of CFRP
Authors: Sha J. J. , Zhang Y.X. , Li J. , Dai J. X. , Wei Z. Q. , Hausherr J. , Krenkel W.
Published: May 2013

In order to investigate the influence of carbon fiber’s surface state on the mechanical properties and the fiber-matrix interaction of CFRP, the change of surface state was achieved by thermal treatment of carbon fibers at elevated temperatures, and the surface state was characterized by XPS. The mechanical properties were measured from the flexural test. The CFRP reinforced with 600 °C treated fabrics containing the highest reactive functional groups, showed the highest flexural strength and modulus. But in the case of CFRP reinforced with 1500 °C treated fabrics containing the lowest reactive functional groups, exhibited the lowest flexural strength and modulus. Combining the mechanical properties with the microstructure analysis, the results indicated that the fiber-matrix interaction (strong or weak) depends on the relative percentage of reactive functional groups present on the carbon fiber surface.
The Effect of Geometric Error on Machining Accuracy for Machining Center
Authors: Liang Gui Qiang , Zhang Ai Rong , Guo Ting Ting
Published: May 2013

In order to improve machining accuracy of machining center, the effect of geometric error on machining accuracy was researched by multi-body system theory. Taking a vertical machining center as example, topological structure of the machining center was described by lower body array. Geometric errors of the bodies in the multi-body system were expressed by homogeneous coordinate transformation. Error model for machining accuracy was deduced and geometric errors having great influence on the machining accuracy were identified. The research results show that, straightness errors and linear displacement errors in three directions have direct influence on machining accuracy, and the effect on machining accuracy caused by angle errors are related to the dimensions of the machining center and travel distance of the three axes. The research results provide guidance for analysis on sensitivity of geometric errors.
A Novel Method for Kinematic Optimization of Camshaft Non-Circular Grinding
Authors: Li Jing , Zhang Wei , Shen Nan Yan , Wang Xin Ling
Published: May 2013

A novel non-circular grinding technique which utilizes two grinding wheels of different diameters is proposed for the locomotive camshaft with concave curves. The larger grinding wheel is used for rough machining to increase grinding efficiency and the smaller is used for finish machining to form the cam profile accurately. Based on the analysis of motion law of grinding carriage and headstock, the speed and acceleration curves are reconstructed by three different methods to optimize kinematic characteristics of cam non-circular grinding. Simulation and experimental results show that the profile accuracy and surface quality can be improved effectively through kinematic optimization by reconstructing the acceleration curves with cosine curves.
Estimation of the Time Constant of Precision Plunge Grinding in Dwell Period Based on Acoustic Emission Measurement
Authors: Jiang Chen , Guo De Bao , Li Hao Lin
Published: May 2013

Our previous work presented a method for estimating the time constant of grinding system in infeed period. To monitor the precision cylindrical plunge grinding process in dwell period, an estimation of the time constant of grinding system in the dwell period, using acoustic emission signal, is presented in this paper. Acoustic emission signals generated during precision grinding are sensitivity and present challenges for accurate and reliable process monitoring. Experiments demonstrate the results of the acoustic emission sensing approach in estimating the time constant in the dwell period of cylindrical plunge grinding.
Research and Application of Dynamic Secondary Cooling Control Method for Slab Caster of CISDI
Authors: Wang Shui Gen , Feng Ke , Han Zhi Wei , Kong Yi Wen , Cao Jian Feng
Published: May 2013

After analyzing the characteristics of each type of dynamic secondary cooling control methods, the combination use of on-line thermal model control and effective casting speed computer dynamic control method was adopted in CISDI dynamic secondary cooling control. On the basis, the transient heat-transfer mathematic model was developed, the determination methods of strand target surface temperature and real time cooling water were proposed, and the design idea of effective casting speed computer dynamic control method was introduced. Considering the probably unreliability of heat transfer difference calculation and inadaptability of heat transfer boundary conditions when too low, too high casting speed or speed variation rate, the on-line thermal model control method was used when the casting speed between 0.8m/min and 1.4 m/min and casting speed variation rate within 0.1m/(min·s), in other cases, effective casting speed computer dynamic control method was adopted.
Research on the Normal Error of Large Aspheric Mirror Employed in Bonnet Polishing
Authors: Yang Wei , Wang Chun Jin
Published: May 2013

The influence functions action orientation of the Bonnet Polishing (BP) process is perpendicular to the contact zone. So the normal error of the aspheric surface should be used as the residual error to calculate the dwell time. But the Z axis direction error is generally adopted as the residual error and few papers on the normal error have been reported hitherto. Its necessary to pay attention to this issue. In this paper, two algorithms which are Asphericity Subtraction (AS) algorithm and Z Axis Direction Error Transformation (ZADET) algorithm are presented to calculate the normal error of the large aspheric surface. Simulations in three different cases are organized to utilize these two algorithms, together with the comparison of them. And the comparison of the normal error and the Z axis direction error is also organized. Its found that there exists difference between AS algorithm and ZADET algorithm. Both of them can be used to calculate the normal error of the aspheric surface when the ratio value of the width to radius is small. And the difference between the normal error and Z axis direction error is considerable. So the normal error should be used as the residual error to calculate the dwell time in BP process.
Numerical Simulation of Feeding Powder Laser Cladding Temperature Field Based on ANSYS
Authors: Song Cheng Fa , Wang Ming Di
Published: May 2013

The numerical simulation method of LCRM Using Coaxial Inside-Beam Powder Feeding is put forward in this page. LCRM conduction model is established, the life and death unit to be used to simulate the real laser cladding process. Calculation results show that the molten pool temperature will gradually increase with the number of cladding layers increase; the highest temperature at the point of application of the laser beam position later; in the cladding process, cooling rate is great in high temperature period, and in low temperature section, cooling rate relatively slight.
3D Laser Remanufacturing of Damaged Parts
Authors: Fang Yan , Yang Xi Chen , Lei Jian Bo
Published: May 2013

A repair method for damaged parts based on laser robot system is proposed. First, to obtain 3D point cloud in the robot coordinate system, damaged part surfaces are scanned with binocular stereo vision system, including camera calibration and image matching. Secondly, with the point cloud data and laser processing parameters, system accomplishes path planning, generates robot programs. Experimental results show that system can effectively achieves 3D reconstruction and path planning, which further enable high precision remanufacturing.
Optimization on Selective Fiber Laser Sintering of Tri-Metallic Powders via Design of Experiments Method
Authors: Liao Hsin Te , Trung Le Manh , Truong Vu Van
Published: May 2013

The objective of this research is to investigate the effect of various parameters on rapid prototyping parts during the process of sintering metal powder by using fiber laser. In order to minimize the percentage of porosities of rapid prototyping (RP) products, sintering a mixture of three metallic powders are investigated. Three metallic powders which are used in this research are Cooper, Iron and Nickel (particle size of Cooper is 5μm, Iron is 70μm and Nickel is 70μm). In addition, control factors and their alternate levels-two levels with 48 run experiments will be identified. The Design of Experiment (DOE) and Analysis of Variance (ANOVA) are used to analyze the results of modeling process. After the ANOVA, a regression model predicting percentages of porosities under various conditions was developed when the traditional Taguchis approach failed to identify a feasible model due to strong interactions of controlled factors.
Innovative Vacuum Cleaner Design Using TRIZ Method
Authors: Hu Shu Jen , Su Ling Huey , Chen James C. , Wei Chih Yao
Published: May 2013

Existing intelligent vacuum cleaners were found to have inadequate suction and power consumption issues in addition to an undistinguished appearance. Therefore, this studys aim was to explore and improve the functionality and appearance of intelligent vacuum cleaners. Based on TRIZ theory, this study conducted a function analysis of intelligent vacuum cleaners and established a proposal for improvement. By combining the 39 engineering parameters with the TRIZ contradiction matrix and 40 inventive principles, appropriate rules were chosen to improve the problem of innovation. At the same time, through patent review and analysis, a design method which did not infringe on current patents was developed. In the results of this study, the vacuum cleaner was complied with an innovative UFO-like design, with suction ports set around the chassis to increase cleaning range and efficiency. When the battery power is below the minimum requirements for optimal performance, the vacuum cleaner can automatically return to a charging stand and replace its own battery. This study also designed the joystick and buttons of the remote control to resemble a cute alien for improved aesthetics. In conclusion, this study used Pro Engineering software to design a vacuum cleaner like UFO and a remote controller shaped like an alien, and a rapid prototype machine was employed to create a product prototype.
Improvement of Packaging Structure and Materials about Daily Chemical Products Plastic Hose Packaging
Authors: Yang Yang , Li Yang
Published: May 2013

Because of a waste problem in plastic hose packaging of daily chemical products, this article recommends an improvement to the structure and material of packaging design for these products. Through the use of a Ziploc®-type structure, this re-design achieves the needs for making full use of package contents and for package reloading functionality. TPE rubber replaces traditional PE plastic, making the improved structure more reasonable to produce, while promoting environmental protection.
Improvement of Structure and Material about Plastic Emulsion Pump for Daily Cosmetic Products Packaging
Authors: Yang Yang , Li Yang
Published: May 2013

Because of a waste problem in plastic emulsion pump packaging of daily chemical products, this article recommends an improvement to the structure and material of packaging design for these products. Through the use of several rotation-type sealing connections in the plastic bottle and an organ structure at the internal hose, these re-designs achieve the needs for making full use of package contents and for package reloading functionality. TPE rubber replaces traditional PE plastic, making the improved structure more reasonable to produce, while promoting environmental protection.
Synthesis and Characterization of MgFe2O4 /MgO Composite Films from Layered Double Hydroxides Precursors
Authors: Zhang Ying Chao , Chen Ting Ting , Yang Lan
Published: May 2013

MgFe2O4/MgO composite films have been successfully fabricated by a facile route using magnesium iron layered double hydroxide (MgFe-LDH) as a single-source precursor. This strategy mainly involves the formation of MgFe-LDH film by casting the slurry of MgFe-LDH precursor on the α-Al2O3substrate, followed by calcination at 900°C. The structure, morphology and magnetic properties of the resulting films were characterized by means of X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), laser particle size analysis, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and vibrating sample magnetometer (VSM). The results show that the composite films are composed of spherical or elliptical grains with diameters of less than 150nm and their thickness range was 2~3 μm. EDX mapping analysis reveals that the composite films have uniform distribution of MgFe2O4particles in MgO matrix. Further investigation indicates that the magnetic properties of the composite films can be tailored by altering the Mg/Fe molar ratio of LDH precursors.
Research on the Influence Factors of the Wave Collar Style
Authors: Zhang Xiao Ping , Zhao Mei Hua , Kong Fan Dong
Published: May 2013

Collar is an important part in the garment structure. It is the visual center of total look of dress style. Wave collar is a changeable and widely-used collar type in fashion, and its design and application have close relationship with many factors. This paper analyzes the influence of the fabric performance and cut-and-open volume on wave collar styles by experiments. The experiments test five kinds of common fabric all the physical properties of the fabrics, and record the wave forms of different cut-and-open volume. Through the analysis of data and combining with appearance shape of the waves, it analyzes the two aspects of the influence on wave collar styles objectively.
Research on Improving the Pass Yield of the Manufacturing of 0645 Type of Sharpener
Authors: Su Bao , Zeng Qi Yong
Published: May 2013

With the rapid development of stationery industry, it is very important to improve the pass yield of manufacturing of pencil sharpener, a kind of traditional stationery products. The current situation of manufacturing process of 0645 pencil sharpener was investigated first. The goal of quality analysis and improvement was set. The causes that affect the main quality characteristic index were analyzed by the cause and effect diagram, and the main causes were confirmed. Design of Experiment (DOE) technology was used to find out the best process conditions. Then countermeasures were made according to the main causes. After checking the improving effect, It is found that the pass yield of the manufacturing of 0645 sharpener has increased from 89.1% to 95.2%.
Analysis of Current Situation of Digital Sculpture Development
Authors: Deng Wei , Chen Yan , Hu Shen Jian
Published: May 2013

Digital sculpture is an emerging sculpture form. The current digital sculptures are dominated by abstract modeling and digital sculpture should also be conducted by simulating the method of traditional realistic sculpture. 3d printing technology still lacks application experience in making large-size digital sculptures, while digital controlled sculpting technology has some limitations for sculpture modeling. In instantiation of works, how to maintain digital characteristics of digital sculpture is an issue that requires in-depth discussion in the field of digital sculpture. 3d scanning technology has realized transition from traditional sculpture to digital sculpture and changed the method in which digital sculpture depends on software.
Analysis of Snow-Ice Characteristics and Clearing Performance on Urban Road
Authors: Li Ya Qin , Wu Wen Fu , Wang Jun Fa , Chen Si Yu , Li Xiao Xia
Published: May 2013

According to the characteristics of compacted snow-ice, the formation types and microstructure of compacted snow-ice were analyzed to know the snow clearing performance and rule and laid the theoretical foundation for related design of snow clearing equipment. In addition, the microscopic snow clearing performance, physical and mechanical properties were described and further research was proposed, which have provided a scientific basis for technology research and equipment development in the field of snow clearing.
Experimental Study on Coal Entry with Water Trickling and Burst Cracked Roof Supported by Anchor Net
Authors: Ma Chang Qing , Dai Bao Qing , Qin Guang Peng , Xu Bin
Published: May 2013

There are large amount of roof water spray in 10# coal seam working face in Tuan Bai coal mine, and the immediate roof with bedding and fractures was fractured. There are also many fallen columns, roof integrity was affected. Varying degrees of damage appeared by adopting traditional I-beam type passive support, when encountered fault, collapse columns and other complex tectonic areas, it prone to collapse accidents. This paper analyses the adaptability of anchor net support, based on the characteristics of coal roadway with water trickling and burst cracked roof, combined field research, coal and rock sampling and underground measures and test methods; by the application of waterproof anchoring agent, making the bolt, the anchorage force meet the design requirements, and ultimately determine the design parameters. Field trails in the headentry, and by analyzing the rock pressure monitoring data, field tests showed that the effect of supporting is good.
Separate the Anshan-Type Low-Grade Hematite Ore With Process of Low-High Intensity Magnetic Separation and Reverse Flotation Method
Authors: Jia Qing Mei , Li Feng Jiu , Li Ying
Published: May 2013

According to the nature ofthe ore which containing hematite and magnetite,under the conditions,forexample,ore grade is 24.07%,the fitst fineness of grinding -200 mesh is 50%，thesecond fineness of grinding -200 mesh ismore than 93%, it is concluded that concentrating circuit consisting of firstgrind-Feebleness magnetic separation -high intensity magnetic separation，secondgrind-second-high intensity magnetic separation- reverse flotation .Ultimately, A concentrate with aproductivity of 18.90%，a grade of 65.21% TFe and the recovery of 51.29% was yielded.
Geostatistics Method for Identification of Minor Structure Seismic Attribute
Authors: Zhang Li Juan , Ma Yong Qiang , Yu Zi Liang , Wei Jun Jun
Published: May 2013

Minor structure of coal seam has a great influence on safe and economic coal mining. It has been noticed by more and more people that the application of 3D-seismic exploration technology to solve minor structures in coal mining. In this paper, geostatistics method was adopted to solve the relativity between multi-attitude and small structures, qualitative and quantitative predicate the mine small structures, which can improve the interpretation precision, and can promote the interpreter’s efficiency, then created more economic value.
Study on Leaching Manganese from Low-Grade Manganese Ores Using Different Reductants
Authors: Liu Wei , Song Chuang Chen , Wang Zhen Hua , Song Jian Guo
Published: May 2013

This study discussed the effects on leaching rate of from low-grade manganese ore using three reductants (Hydrogen peroxide, Glucose, Cellulose). The results showed: great increase of extracting rate can be obtained in the process of leaching by adding a small amount of reductant. the leaching rate of two valence manganese can reach a maximum of 90.76%, using hydrogen peroxide as the reductant.