bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Visual Recognition Algorithm for Loading Robot Vision System
Authors: Yang Yong Tao , Wen Huai Xing
Published: December 2012

In order to study the questions about the recognition of relative position for the operating object and calculation of the object volume in the loading robot binocular stereo vision system. Based on the characteristics of the operating object, proposed the method that use of its vertices only to match the corresponding point of the camera imaging for location identification, also raised the approximation algorithm that firstly, cut up the whole, followed by calculate the volume of the various parts, then carry out the sum of the each segmentation volume. Experiments and analysis showed that the distance of camera and the object greater affect the visual system, less impact on the intensity of light；In the target object segmentation， the number of partition k=11 is better. Both methods produced the small errors for the visual recognition of the system, it can meet actual needs.
Study on Foreign Military Equipment Support Informatization Construction
Authors: Liu Tao , Li Tao , Zhang Ning , Chen Li
Published: December 2012

Abstract: The demand of equipment support in the condition of Information war is higher and higher, traditional concept, theory, mode and command of the equipment support are faced with serious challenges. The positive reformation and result obtained are introduced during the process of the equipment support about foreign military from the view of the concept, method, system, organization, management and so on. Finally proposal and measure about our army to strengthen construction of informatization equipment support are offered.
Study on the Driver Control System of the Full AC Electric Stacking Forklift
Authors: Chen Guo Jin , Liu Ting Ting , Ni Jing , Xu Ming , Feng Huo Qing
Published: December 2012

Logistics Machinery is the important equipment for carrying material. The all-electric logistics machinery is a development trend in the international logistics industry today. This paper studies the intelligent control model and algorithm for the driver control system of the full AC electric stacking forklift, proposes the composite models of the fuzzy neural network’s identification NNM and the Self-tuning PID NNC, and designs the variable frequency module of the speed sensorless vector control. Through the organic integration of the variable frequency module, the speed reducer and the AC motor, we develop the integrated machine used for the driver control system of the full AC electric stacking forklift. The paper put forward the intelligent control method of the variable frequency which combines the load’s characteristic recognition with the control to achieve the best matching, the highest efficacy and the lowest energy consumption of the entire transmission system.
The Effect of the Slip Ratio in Sagittal Plane on the Wear of UHMWPE Bearings in TKR
Authors: Kun Hu , Yao Jin
Published: December 2012

Reducing the sliding distance by decreasing slip ratio which occur during knee articulation helps to reduce the wear rate of the ultra-high molecular polyethylene (UHMWPE) bearings in total knee replacements (TKR). However, in the limited space in knee, a smaller sagittal radius of femoral articular surface which leads to greater contact pressure that may aggravate wear is needed to make a smaller slip ratio possible. This paper described a model for evaluating the effect of slip ratio in sagittal plane on the wear depth of UHMWPE bearings. The results showed that decreasing the sagittal radius of femoral articular surface properly was an effective approach to reduce the wear of UHMWPE bearings.
Influence of Heat Treatment on Microstrudture and Mechanical Properties of AZ31B Magnesium Alloy Prepared by Solid-State Recycling
Authors: Wu Shu Yan , Ji Ze Sheng , Tian Chun Ying , Wu Ming Zhong
Published: December 2012

This work is to study the influence of heat treatment on microstrudture and mechanical properties of AZ31B magnesium alloy prepared by solid -state recycling. AZ31B magnesium alloy chips were recycled by hot extruding. Three different heat treatments were conducted for recycled alloy. Mechanical properties and microstructure of the recycled specimen and heat treated specimen were investigated. 300°C×2h annealing specimen exhibits finer grain due to static recrystallization, and microstructure of 400°C×2h annealing specimen becomes more coarse. 300°C×2h annealing treatment improves obviously strength and ductility of recycled alloy. Ultimate tensile strength of alloy decreases and elongation to failure increases after 400°C×2h annealing. Grain size, dislocation density and bonding of chips have an effect on the elongation of recycled materials. 190°C×8h ageing has no influence on microstructure and mechanical properties of recycled alloy.
Two-Cylinder Synchronization Control and Simulation of ROV Launch and Recovery System “A Shape” Frame
Authors: Zhang Wei , Sun Bin , Li Bin , Tang Shi
Published: December 2012

This paper focuses on “A shape” frame’s two-cylinder synchronization control of Remotely Operated Vehicle (ROV) launch and recovery system. First, two-cylinder synchronization control scheme with counterbalance valve and proportional valve is proposed. Second, counterbalance valve model is established, and its supercomponent is generated. Finally, simulation of synchronization control system is performed. After adjusting PID controller parameters, displacements error of two cylinders is controlled in the allowed range.
The Research of Tailings Pond Deformation Displacement Prediction Based on Wavelet Neural Network
Authors: Liu Ping Ping , Hao Ying Jun
Published: December 2012

In order to ensure the safe operation of the tailings pond, and control the occurrences of mine accidents, Strengthening the security research and Establish forecasting model are important. This paper takes dam deformation as the research key, takes the online monitoring as row data, and takes deformation factors as the main line, then uses the method of wavelet neural network, finally establish the prediction model and then analyze. The result shows that this method avoids the concrete form of knowledge representation and has the great nonlinear function approaching capability.
Geometric Modeling of Planning Anthropomorphic Robot Hand for Manufacturing Waterproof Glove
Authors: Zheng Duan , Liao Xiao Ping , Liu Yuan Yuan , Sun Juan Quan , Fu Rui Qing , Wu Xin Yu
Published: December 2012

Planning anthropomorphic robot hand for manufacturing waterproof glove, we adopt the geometric modeling method and develop a dexterous robot hand. This robot hand has powerful fingertip force and dexterous motion. This paper presents the design and experiments of this robot hand which has 7 actuated degrees of freedom. Each part of the robot hand has been established the geometric model. For acquiring the powerful force, the finger is driven by tendon, and the driving force from the actuators has been transmitted to the fingers by wire ropes in the arm. The prototype of this robot hand has been developed and tested. This experiment demonstrates that the robot hand can wear the glove efficiently and make accurate gestures which is the user expected. The application of this robot hand in the waterproof glove production line can save the physical labor.
Dynamic Characteristic Analysis of New Pneumatic Bending Joint
Authors: Huang Peng Cheng , Yang Qing Hua , Bao Guan Jun , Zhang Li Bin
Published: December 2012

Aimed at existing problems on the bending performance of pneumatic bending joint, a new type of pneumatic bending joint is proposed in this paper. Double flexible pneumatic actuators are used as actuating drivers. Based on the first law of thermodynamics and the joint dynamic equation, the angle dynamic model is established and analyzed. Moreover simplified model is proposed. Meanwhile, its dynamic characteristic is analyzed through simulation analysis. The simulation suggests the following results: in the gas-filled phase, the joint’s pressure response time is about 10ms; while it is about 60ms in the gas-escape phase; and the angle response time of joint is 10 to 20ms. When the joint damping coefficient is increasing, this value will also increase.
Reliability Analysis Based on Fault Tree of Failure of Boiler Drum
Authors: Tian Qian , Chen Ping , Luo Cong
Published: December 2012

Drum is the core pressure equipment of Natural Circulation Boiler. The harsh working conditions lead drum to be prone to failure in power station boiler system. This article presents a systematic analysis of factors which may cause the failure of the drum and builds the fault tree with the drum failure as the top event. Through calculating each order of minimum cut sets and importance degree of each basic event probability to determine the major influent factors for the failure of drum, this article puts forward the corresponding solutions and brings reference value to safe operation and maintenance of boiler drum.
Topological Research on Hybrid Mechanism
Authors: Luo Jian Guo , He Mao Yan
Published: December 2012

Methods to analysis the DOF(degree of freedom) and singularity of pure serial and pure parallel manipulator, which can not be used to the hybrid manipulator directly, three type of practical topological units and one type of virtual topological unit adopted, Synthesis method of topological dimensionality of the spatial mobility of each topological unit integrated together, architectures of serial-paralle mechanism discussed, also the formula and process of its topological dimensionality of spatial mobility presented, singularity analysis of hybrid mechanism can be carried out based on the forgoing results.
A Method for Measuring the Systematic Errors of CNC-Machine Tools
Authors: Gao Qi
Published: December 2012

The method used for measurement and calibration of machine tool errors should be general and efficient. With this method, the machine tool status can be completely identified and its accuracy can be enhanced by software error compensation. The point compensation method can be used as a means for modifying the nominal tool path and on-machine inspection where the machine tool is used as a coordinate measuring machine. The validity of the error calibration method proposed in this' paper was shown using a vertical 3-axis CNC machine with a laser interferometer and a ball bar technique.
Study on a Novel Form-Stable Capric Acid/Organophilic Montmorillonite Composite for Thermal Energy Storage
Authors: Wei Ting , Wang Zhen , Zheng Bai Cun , Gao Yan Feng , Guo Wei Hong
Published: December 2012

A novel form-stable capric acid/organophilic montmorillonite composite for thermal energy storage is developed in this study. The morphology and thermal properties were determined by scanning electron microscope(SEM), polarized optical microscope(POM), differential scanning calorimetry(DSC) and thermogravimetric analyzer(TGA). The DSC results showed that the on-set temperature of the sample with 40% wt CA was closed to 29°C, the latent heat was 35.8 J/g at 56 kPa and 51.5 J/g at 0 kPa, while the on-set temperature of sample with 60% CA was also 29°C, the latent heat was 79.7 J/g at 56 kPa and 80.8 J/g at 0 kPa. TG investigations revealed that the composites had excellent thermal stability above their working temperature ranges. The POM images exhibited phase behaviors of composites to confirm leakage, and the samples with 20% and 40% CA showed good thermal properties. In addition, SEM images presented the microstructure of all the samples. All of the conclusions indicated that sample with 40% wt CA was a better candidate for novel form-stable CA/OMMT composite for low-temperature thermal energy storage applications.
Determination of Alloy and Impurity Elements in the WC-Co Based Cemented Carbide by Microwave Digestion - Inductively Coupled Plasma Atomic Emission Spectrometry
Authors: Cheng Yong
Published: December 2012

Using high-pressure sealed microwave heating method, the WC-Co based cemented carbide samples were digested completely by nitric acid and phosphoric acid (VHNO3: VH3PO4 = 5:1). Then the digestion solution was diluted with water to a constant volume, and directly using inductively coupled plasma atomic emission spectrometry (ICP-OES) determination of the content of 0.005 to 10% Co and 0.005 ~ 1% of Fe, Nb, Ta, V, Cr, Mo and Ni. This paper examine the best digestion conditions, including reagent composition, ratio, and microwave control parameters, etc., then establish a set of microwave digestion and by complex reactions with inorganic reagents to stabilize the high tungsten matrix digestion method, in order to quickly and completely digest the tungsten-cobalt-based samples and avoid the generation of tungsten acid precipitation resulting in the loss of some of the analyte and impact of organic complex agents on the spectral determination. The results showed that: the control parameters of using 5 min to heat the sample to 130 °C and keep for 5 min, then heated to 190 °C in 5 min and keep for 15 min is better to maintain the digestion. By optimizing elemental analysis line, ICP measurement parameters and matrix matching and synchronization of background correction method, the high tungsten matrix effects and spectral interference are eliminated; ensure the detection performance of the method. Background equivalent concentration of 5μg/L (Nb) ~ 18μg/L (Fe), elements of the detection limit of 4μg/L (Nb) ~ 13μg/L (Fe), which used for the determination of impurities in the alloy or elements with the results is RSD <3%, recovery 97.0% ~ 103.5% corresponding with the national standard examination method.
Study on Alleviating Thermal Stress of Piston Head
Authors: Zhang Ya Mei , Zhang Wei Zheng , Cao Yuan Fu
Published: December 2012

In order to alleviate thermal stress of piston head, the causes of thermal stress are studied. The original piston is modified from the perspective of easing strain concentration. The thermal stress and strain fields of the original and modified pistons are analyzed with FEM. Comparison of the analysis results shows that analyzing strain concentration is an efficient way to find out the fundamental causes of high thermal stress of piston head. Thus viable approaches are proposed to solve the problem.
Effect of Atomizer Disc Geometry on Zinc Metal Powder Production by Centrifugal Atomization
Authors: Sungkhaphaitoon Phairote , Likhidkan Wittaya , Kitjaidiaw Sermwit , Wisutmethangoon Sirikul , Plookphol Thawatchai
Published: December 2012

The purpose of this paper is to demonstrate the influence of atomizer disc shape and size on the characteristics of zinc metal powder produced by centrifugal atomization. Two types of atomizer disc were employed, the flat disc and the cup-shaped disc with diameters of 30 and 50 mm for each type. The atomization was carried out in ambient air atmosphere, at pouring melt temperature of 550°C. The molten zinc was fed by gravity through a 1.0 mm nozzle with melt flow rate of approximately 50 kg/hr onto the atomizer disc spinning with a speed of 30,000 rpm. It was found that, the median particle size of zinc metal powder was decreased with increasing atomizer disc size. The cup-shaped disc gave better powder production with smaller particle median size and higher production yield. SEM images revealed that most zinc metal particles were irregular, ligament and elongated flakes. The oxygen in air might inhibit the spheroidization of melt droplet during solidification.
Residual Stresses in Prestressed Turning of Nickel-Based Superalloy
Authors: Peng Rui Tao , Lu Fang , Tang Xin Zi , Tan Yuan Qiang
Published: December 2012

Aiming to get appropriate residual compressive stress distribution on machined surface just in the machining process, the technique of prestressed cutting is applied for nickel-based superalloy shafts. This article studies theoretically and experimentally the effect of prestress on the residual stress in the machined surface layer. Prestressed turning tests under the conditions of different prestress, cutting speed, depth of cut and feed rate were carried out, residual stresses were determined via an X-ray diffraction technique. Theoretical result demonstrates that higher prestress leads to more prominent residual compressive stress and validated by experiments, meanwhile measured residual stress profiles indicate that lower cutting speed and lower feed rate lead to more remarkable compressive stress state, contrarily depth of cut shows relatively indistinctive effect.
Quantum State in Fabricating Silica Antireﬂective Coatings
Authors: Jin Rui Min , Cai Zhi Duan , Cang Li Min , Yan Tao
Published: December 2012

Based on TEOS system and sol-gel process, together with catalysts, Antireﬂective coating films prepared by sol—gel on glass substrate have been processed by rapid thermal annealing (RTA). the refractive index and thinkness of SiO2 film is exactly controlled. The films are characterized by ellipsometer and SEM respectively. The quantum states in these processions are found and discussed.
Growth Time Influence on Polycrystalline α-HgI2 Films
Authors: Liu Gong Long , Ma Lei , Liao Yang , Shi Wei Min , Yang Wei Guang , Zhang Yue Lu
Published: December 2012

Polycrystalline α-HgI2 films have been grown on TFT substrates using hot-wall vapor phase deposition (HWPVD) with the different growth times. The influence of different growth times (1 hour, 2 hours, 3 hours, 4 hours) on the structural and electrical properties of the polycrystalline α-HgI2 films is investigated. Metallurgical microscope, scan electron microscopes (SEM) and X-ray diffraction (XRD) characterization and the electric transport properties were investigated by the I-V characteristics. The polycrystalline α-HgI2 films growth by 3 hours show more better performance than others. So we use it preparation a detector.Finally, capacitance frequency characteristics analysis showed the detector have good performance.
Research and Application of Dual Liquid Bimetal Composite Casting Hammer
Authors: Bian Wen Li , Rong Shou Fan , Zhu Yong Chang , Zhou Hai Tao
Published: December 2012

According to the hammer crusher working condition, a kind of dual liquid bimetal composite casting hammer was developed. Its service life is three times than that of high manganese steel. It improves the wear resistance and increases production efficiency significantly, and is welcomed by user deeply.
Optimising Injection Moulding Parameter Setting in Processing Polypropylene-Clay Composites through Taguchi Method
Authors: Mohd Hilmi Othman , Hasan Sulaiman , Muhammad Wan Nur Azrina Wan , Zuramashana Zakaria
Published: December 2012

The main purpose of this research is to optimise the injections moulding parameters in processing of thermoplastics samples made from Polypropylene (PP)-Clay with the fraction of 95% PP and 5% Clay, through Design of Experiment -Taguchi Method. The selection of defects or responses that need to be controlled for these thin layer products were warpage and shrinkage. The parameters that were taken into consideration were packing pressure; melt temperature, screw speed and filling time. In this research, the L934 orthogonal from Taguchi Method was chosen as the experiment setup. According to the results, 170°C of melt temperature, 80% of packing pressure, 70% of screw speed and 3 seconds of filling time gave minimum shrinkage of 3.45%. As for the warpage results, the best parameters combinations are 170°C of melt temperature, 70% of packing pressure, 70% of screw speed and 2 seconds of filling time. The Analysis of Variance for warpage shows that screw speed was the most significant factor with 41.83% contribution. As for shrinkage, the most influential factor was packing pressure with 98.48% contribution. Two factors have been pooled which are screw speed and filling time. Based on these findings, it is concluded that by controlling the optimum parameter setting, the best quality of desired product can be easily achieved and maintain through the in process production.
The Analysis for Mechanical Response of 16MnR Steel under Single-Tank Pool Fire
Authors: Xie Fei , Song Wen Hua , Chen Zhen , Lv Ling Yue
Published: December 2012

Flammable liquid storage tanks could collapse easily and cause the accident spread rapidly in the high-temperature environment of pool fire, because pressure in the tank rises and the yield strength of wall decrease.So it is great significance to study the development of wall material under high temperature for the safety of flammable liquids tank farm. Taking 1,2- dichloropropane storage tank for example, based on the methods of heat transfer and numerical simulation, the mathematical model for thermal response of wall material 16MnR steel is builded to analyse the mechanical response of 16MnR steel under pool fire. When a pool fire of single tank took place in tank farm, the 1,2-dichloropropane was heated and gasitied that cause pressurizing, while the mechanical property of 16MnR steel weakened. By the finished model, this paper calculated the fail time of wall is 28.6min;failpoint of pressure is 2.065MPa;failpoint of temperature is 245°C,while temperature on heating surface of wall is 700-800 °C
Al-Induced Crystallization of Amorphous Silicon Film
Authors: Zhou Ping Sheng , Shi Wei Min , Jin Jing , Qian Jun , Qu Xiao Lei , Wang Lin Jun
Published: December 2012

Al-induced crystallization (AIC) method was used for obtaining polycrystalline silicon (poly-Si) film on glass substrate. The films with glass/a-Si:H/Al structure were fabricated by Plasma Enhanced Chemical Vapor Deposition (PECVD) and magnetic sputtering. Then the samples were sent to perform annealing treatments during the different temperatures and time. The experimental results demonstrate that a highly crystallized poly-Si sample can be achieved by annealing at 480°C for 2h. The crystalline fraction (Xc) of the sample is about 99.1% and the Full Width at Half Maximum (FWHM) is 4.89cm-1. The average grain size of this sample is about 250nm. The energy dispersive spectroscopy (EDS) measurement confirms that the residual Al in the film is very little.
The Impact of the Conductive Filler on the Dielectric Properties of Force-Sensitive Conductive Silicone Rubber
Authors: Wu Xiao Lian , Lu Jun
Published: December 2012

Based on the analysis of the conductive mechanism of the conductive rubber used in robot tactile, the paper discussed the influence of the type, particle size and amount of the conductive filler on the dielectric properties of the force-sensitive conductive silicone rubber.Experimental results showed that, for the same mass fraction of the filler material, the particle of bigger size would bring the resistance to decrease more quickly, on the contrary, the smaller one made the the resistance decline.Under the same pressure, with the increase of the amount of graphite filled, the resistivity of the samples would decrease. The resistance of the silicone rubber was changed by the alloy powder added, and the relationship between the tendency of resistance change and the amount of alloy addition was not a single linear, however it significantly increased the range of pressure sensitive of the conductive silicon rubber, and the dielectric properties were improved at the same time.
The Photoelectric and Photocatalytic Property Study of Cu2S/ZnO Films
Authors: Xu Feng , Sun Sheng Nan , Wang Yi Xin , Cao Jia Jia , Wang Zi Han , Bian Feng Ling , Cui Hai Ning
Published: December 2012

ZnO film and Cu2S/ZnO bilays on the glass substrate were fabricated by RF magnetron sputtering. We carried out the experiments by adjusting the thickness of Cu2S on ZnO layer. The performance of Cu2S/ZnO on the transparency, conduction and photocatalysis were investigated. The photocatalytic experiments showed a good photocatalytic activity for photodegradation of methyl orange.
The Investigation of Material Transfer Characteristics and Surface Morphology of PtIr Contact Materials
Authors: Wang Sai Bei , Xie Ming , Yang You Cai , Zhang Ji Ming , Chen Yong Tai , Liu Man Men , Yang Yun Feng
Published: December 2012

Material transfer characteristics and surface morphology of contact material reflects their electrical erosion performance. In this paper, by using a JF04C contact material testing machine, the characteristics of electrical erosion of PtIr contact materials are acquired under low voltage, resistive load and small current. By means of an electronic balance and SEM, the material transfer values of the PtIr contact materials and the characteristics of contact material surface profile are obtained and analyzed. The results show that PtIr alloy contact materials mainly transfer from cathode to anode and its breaking arcs are metallic phase.
The Quantitative Analysis of the Thermal Radiation Protective Effect in the Fire-Retardant Insulation Materials of the Fire Protective Clothing
Authors: Chen Zhen , Song Wen Hua , Lv Ling Yue
Published: December 2012

The fire protective clothing is essential protective equipment in fire-fighting operations for the firefighters, which can effectively reduce the damage of high temperature and radiation to the firefighters in the fire. In the actual fire-fighting and rescue, mastering the specific thermal protective effect of the fire protective clothing is necessary in order to accurately grasp the security extinguishing distance. Firstly, this paper presents an overview of the development and performance requirements of the fire-retardant insulation materials for the fire protective clothing, and performance evaluation standards are also introduced. And then take a large crude oil reserves depot for example, and set the pool fire scene inside the tank, which builds the risk analysis model of pool fire. Not considering the impact of the wind speed, the flame height of a single tank in the pool fire is 76.2m, and the total thermal radiation flux is 1.4 × 106kw. The threshold is set at the standard that the firemen directly affected by the thermal radiation feels the pain above 20s, and the safe diSuperscript textstance of extinguishing the fire for the firefighters is 167m without the protective clothing; the safe distance of extinguishing the fire for the firefighters is 78.4m under the protection of the clothing.
Rheology of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization
Authors: Li Min , Xiao Li Guang , Zhao Hong Kai
Published: December 2012

The linear shear rheological behaviors of polyethylene/montmorillonite (PE/MMT) nanocomposites were investigated by a rheometer. The storage moduli (G′) and loss moduli (G″) of PE/MMT nanocomposites increase obviously with the silicate loading only 0.1 wt%, this is ascribed to a strong interficial adhension. The presence of MMT leads to pseudo-solid-like behaviors and the molecular chain of PE/MMT melts confined. For all samples, the dependence of G′ and G″ on ω shows nonterminal behaviors. The terminal slope decreases as the silicate loading increased from 0.1 % to 0.8 wt%. However, the terminal slope of PE/MMT nanocomposites increases as the silicate loading increased from 0.8 % to 1.2 wt% . This may be attributed to the aggregation of a small amount of MMT.
Statistical Analysis of Cutting Forces in the Milling of Titanium Alloys with Polycrystalline Diamond (PCD) Tools
Authors: Pan Wen Cheng , Ding Song Lin , Mo John P.T.
Published: December 2012

Polycrystalline Diamond (PCD) is one of the popular materials in industry because of its superior mechanical properties. With the hardness of up to 8000HV and the thermal conductivity of 360 W/mk, PCD can be used to machine hard-to-machine materials. This paper introduces the statistical analysis of cutting forces in the milling of Titanium alloys with small PCD tools. Nine customized PCD tools with different tool geometries were fabricated by changing the front angle, clearance angle and cutting edge angle. Cutting experiments were carried out and cutting forces were recorded with a DAQ system. Through statistical analysis it was found that clearance angle affected cutting forces more significantly than the other parameters
Microstructure and Magnetic Properties of C-Axis-Oriented Mo/NdFeB/Mo Films
Authors: Liu Wen Feng , Zhang Kai , Zhang Hai Jie
Published: December 2012

Mo/NdFeB/Mo thin flms were deposited by dc-magnetron sputtering onto Si substrates, then were annealed at 650 °C for 30 min. Nanostructured Mo/NdFeB/Mo films were successfully obtained with the magnetic easy axis of NdFeB perpendicular to the film plane. It was found that the c-axis orientation depends on the NdFeB sputter power. Good c-axis orientation was obtained at 40W NdFeB sputter power. Meanwhile, Mo layer can not only induce the c-axis orientation of NdFeB, but also improve the crystallization of NdFeB grains.
Measurements of Young’s Modulus of Silicon Oxynitride Using Micro-Cantilever Structure
Authors: Dong Jian , Jiang Heng , Zeng Xi
Published: December 2012

In this work, a SiON film with 25.78% nitrogen contents in film composition was deposited by RF magnetron sputtering. Micro SiON cantilevers were fabricated using MEMS sacrificial layer technology for tests. The micro-cantilever bending tests were done with the help of nanomechanical test system to characterize the Young’s modulus of the SiON. The results showed that the Young’s modulus of the SiON was 256 GPa. Because cantilevers can release the residual stress of the SiON film, the Young’s modulus we gained was more accurate than that early gained by other measuring methods.
Preliminary Study on Mechanism of Superalloy Deep-Hole Honing Technology
Authors: Pan Lin , Zhu Lin
Published: December 2012

Anglicizing the superalloy mechanical and cutting characteristics, and according to the oil-stone grinding characteristics, choose the current commonly abrasives in the domestic. Processing performance test of inconel 718 deep-hole honing is carried out. The comparison test results show that the grinding performance of ceramic corundum is better than other oilstones at test condition. Grinding characteristics of ceramic corundum is carried on, study show that the size of ceramic alumina grits range from 0.067 to 0.005 μm, The grinding passivated tiny grains of ceramic corundum oil-stone broken and fall off timely, which is beneficial to oil-stones, self-sharpness. The excellent performance of ceramic corundumcan self-sharpening can improves the efficiency of honing effectively.
Analysis of Square Billet Cross Wedge Rolling Process Using Finite Element Method
Authors: Ma Wen Yu , Wang Bao Yu , Zhou Jing , Li Qiao Yun
Published: December 2012

The aim of this paper is to determine whether the train axle cross wedge rolling(CWR) using square billet as blank is available or not. Based on numerical simulation software DEFORM-3D, we built the finite element model. And the whole forming process was simulated successfully. The stress and strain distributions of workpiece in the process were analyzed. The effect of forming angle, stretching angle and billet size on rolling force was investigated, then determined the proper process parameters. The differences between the round billet rolling and the square billet rolling were obtained by comparing the tangential, axial and radial forces during the rolling process. The studied results show the availability of using square billet as blank in train axle CWR and provide important realistic meaning and application value.
Green Design and Manufacturing Technology of the Rock Drilling Machines
Authors: Yang Ji Rong , Liu Qi Yuan , Luo You Xin
Published: December 2012

Green design and manufacture is a kind of sustainable development model in modern manufacture. This paper focuses on green design concept, application and selection of green materials and product manufacturing of the rock drilling machines.
Interference Effect and Digital Image Processing Based on Dual-Core Photonic Crystal Fiber
Authors: Zheng Guang Hua , Huang Xue Feng , Xu Jiang Rong
Published: December 2012

This paper presents the interference effect based on dual-core photonic crystal fiber (PCF) and explains the principle of interference imaging. Interference image of dual-core PCF has been acquired by CCD. Furthermore, digital image processing technique is utilized to extract the skeleton of interference fringes. Eventually, the spacing intervals of interference fringes are obtained successfully by measuring scale calibration. Interference effect based on dual-core PCF paves the way to physical sensing in MEMS field.
NC Turning Process Parameters Optimization Based on Simulation Software
Authors: Sun Shu Feng , Wang Ping Ping , Wu Xin , Lin Sen
Published: December 2012

Machining process parameters are main factors influencing machining quality and efficiency. Finite element models of tool and part are set up using finite element software Deform-3D. Variety laws of cutting force and temperature under different process parameters are simulated. The results are analyzed. Cutting force grows obviously with the growth of cutting speed (vc). However, cutting force fluctuates and decreases with the growth of cutting depth (ap) indicating the phenomenon of work hardening. Cutting force fluctuates and grows with the growth of feed rate ( f ). But the influence of feed rate ( f ) to cutting force is smaller than that of cutting speed (vc). The growths of the above mentioned three process parameters all cause the rise of temperature. Machining simulation research provides the optimum process parameters for CNC programming.
Characterization of Graphite Containing Ceramic Coating Prepared on Carbon Steel by Plasma Electrolytic Oxidation
Authors: Wang Yun Long , Wang Miao , Zhou Ming , Jiang Zhao Hua
Published: December 2012

Ceramic coatings containing graphite were prepared on Q235 carbon steel by plasma electrolytic oxidation (PEO) in aluminate electrolyte with graphite dispersed in electrolyte. The microstructure and properties of the coatings including phase composition, surface and cross section morphology, thickness and bonding strength were characterized. The results showed that the coating consisted of FeAl2O4, Fe3O4 and a certain amount of graphite. The coating was typically characterized by micro pores and ball-shaped round grains distributed on the surface. With increasing the treating current density, the pores became bigger and the ball-shaped round grains became more. Coatings obtained with various current densities showed a good interface between the coating and substrate. The bonding strength of the coatings decreased a little when increasing the current densities, the values of which were all above 20MPa. The coating grew both inwards and outwards to the substrate surface. With increasing the treating current density, the consumption of substrate gradually increased but the whole thickness was not strongly affected by the current density and the value was about 115 μm.
Sensitivity Analysis of Geometric Errors for Five-Axis CNC Machine Tool Based on Multi-Body System Theory
Authors: Wang Wei Qing , Wu Huan Qin
Published: December 2012

Abstract: In order to determine that the effect of geometric error to the machining accuracy is an important premise for the error compensation, a sensitivity analysis method of geometric error is presented based on multi-body system theory in this paper. An accuracy model of five-axis machine tool is established based on multi-body system theory, and with 37 geometric errors obtained through experimental verification, key error sources affecting the machining accuracy are finally identified by sensitivity analysis. The analysis result shows that the presented method can identify the important geometric errors having large influence on volumetric error of machine tool and is of help to improve the accuracy of machine tool economically.
Mechanical Shock Ability of Different Potting Materials and Packaging Processes for Electronic Components
Authors: Pan Bo , Wang Yong , Jin Jing Min , Wang Lin , Ma Mao Dong
Published: December 2012

In the paper, the mechanical shock abilities of the three potting materials of hard material, silicone and paraffin wax for the ceramic packaging capacitors and metal packaging capacitors are investigated by mechanical shock tests. Results show that the mechanical shock resistance ability of the hard epoxy resin potting material is the strongest, and the mechanical shock resistance ability of the metal packaging component is more than the ceramic packaging. The mechanical shock resistance value of the epoxy resin potting material for metal packaging capacitors is in 20000g above.
Study on Numerical Simulation of Automobile Covering Parts Stamping Forming Process
Authors: Qiu Xiao Gang , Huang Yue Dong
Published: December 2012

Performing the 3-D numerical modeling of the automobile covering parts by the Pro/E software, creating both addendum and blank holding surfaces, and importing them into the DYNAFORM so that a FEM model can be created. Use the DYNAFORM to perform the simulation calculation and analysis, and study the influences of the factors such as friction coefficient, die clearance and material parameters (n and r values) on the stamping formability. The results show that the parameters such as friction coefficient between die and blank, die clearance and the v value in the material parameters play the key role in the the blank flowability, and have the significant influence on the stamping result.
The Design of a Horizontal Combining CNC Machine Tool of Turning and Grinding
Authors: Guan Shang Jun , Yang Ke , Sun Jun You , Zheng Wen Jie
Published: December 2012

This paper describes and introduces the design method and driving principle of the horizontal Combining CNC machine Tool of Turning and Grinding in which the turning tool holder and wheel frame are arranged on both sides. In the meantime, it verifies the reliability of this scenario by digital module and dynamic simulation, which creates a solid base for the manufacture of CNC in the future.
Virtual Design and Kinematics Simulation of a Combining CNC Machine Tool of Turning and Grinding Based on SolidWorks and ADAMS
Authors: Guan Shang Jun , Yang Ke , Sun Jun You , Li Xin Jun Teng
Published: December 2012

This paper describes and introduces useing parameterization and variable of Modeling Technology of SolidWorks software of design procedures, to finish virtual design of machine Tool of Turning and Grinding. Then go on with interference check in and kinematics simulation for Tools and Turning. Use finite element analysis of ANSYS to go on with stress analysis for key points of load of the machine, to provide that physical design of the machine is reasonable. It is achieved forecast of workpiece property in the time of designing. Thus it will be achieved feasibility of designing and study of combining machine tool of turning and grinding in virtual environment, so as simplify process of designing, and shorten the development of period, and improve the quality of designing.
The Implement of Robotic Cutting Trajectory Plan for Pressure Vessel
Authors: Qiu Xiao Li , Xing Yan , Feng Shuang
Published: December 2012

Robot is now can used to cut the opening pore of Pressure Vessel and the end of pipe. It is important to solve the problem of robotic cutting trajectory planning for cutting of the three-dimensional curved surface and the intersected curve with groove at the end of pipe. According to the analytical geometry in the three-dimensional space, the mathematical model of intersected curve with groove is presented. Trajectory planning and cutting torch stance is fixed through the feature extraction and kinematics calculation. Using the L-positioner, the problem of robot limiting in cutting process is resolved. As a post operator, a program is developed to automatically generate corresponding robot program to match to the program language format of Kuka and Reis robot. The robot cutting trajectory supported by the above algorithms and program is tested in solidworks.
Research and Realization of the New Fiber-Optic Liquid-Level Gauge
Authors: Ren Gong Chang , Chen Bo , Ye Qing , Wang Yong Fei
Published: December 2012

This system centers on the Single Chip Micyoco(SCM), presents a new fiber-optic liquid level gauge based on the accurate liquid level sensing property of the fiber-optic sensor probe and achieves automatic measurement of high accuracy of the measured liquid level. Thus, it can be widely used in a variety of similar continuous automatic measurement in petrochemical industry, especially for that of small containers
Analysis of Environmentally Friendly Packaging Materials in Modern Packaging Design
Authors: Wei Li Na
Published: December 2012

Nowadays, “green and environmental protection” is the theme of the social development. Therefore, packaging waste has become a prominent environmental problem that should be solved as quickly as possible. In such background condition, the research and application of environmentally and friendly packaging materials gets more and more important and urgent. Corn plastic, oilseed plastic, straw container, renewable foam plastic, foaming plant fiber and other environmentally friendly packaging materials are in line with the requirements of the times. But what we cannot forget is that when catering to the trends of times, our packaging design has to also inherit the essential traditional culture in the use of the material. Only in this way can we stand among the nations of the world.
Micro/Meso Roll-to-Plate (R2P) Imprinting Process to Fabricate Micro Channel/Riblet Features
Authors: Gao Zhao Yang , Peng Lin Fa , Yi Pei Yun , Lai Xin Min
Published: December 2012

Functional metallic surface micro/meso structures such as micro channels/grooves or micro riblets have been increasingly applied in many fields, such as optics, tribology, fluid-dynamics and heat exchange or mass tranfer. Micro/meso forming has the potential of efficiently and economically fabricating functional microstructures over a large surface area. A mciro/meso roll-to-plate imprinting technique was proposed and the process system was self-developed. The pure copper specimens with various grains were imprinted to investigate the effects of mould cavity dimensions (width, spacing, and fillet) and grain size on the formation of features. It was concluded that the width and grain size had significant effects on the feature formation. Wider groove or larger size grain was helpful to enhance the flowability of materials. Moreover, the technique was validated for high throughput, low cost, low emission, and flexible fabrication technique.
Research on Auxiliary Electromagnetic Damping System for Machine Tool Spindle
Authors: Wang Han , Chen Xin Du , Chen Xue Song , Liu Qiang , Yang Zhi Jun , Wang Su Juan , Qin Lei , Zhou Huan Wei
Published: December 2012

This paper studies auxiliary electromagnetic damping system in the conventional machine tools. Through the establishment of auxiliary active magnetic actuator array and the application of optimal control, dynamic control of additional stiffness and damping are achieved, so some active interventions can be applied to reduce the chatter of traditional machine tool spindle. Thus it causes to lower the radial vibration amplitude of the spindle at work and improve the machining accuracy. The experiments show that this system can reduce more than 88.06% spindle radial amplitude, and it can actually improve the precision to about1um, so the system has enormous potential for low-cost upgrade of traditional machine.
Technique of Code Obfuscation Based on Class Splitting
Authors: Sun Yong Yong , Huang Guang Qiu
Published: December 2012

The security of software is threatened by piracy, tampering and reverse engineering. Attackers attempt to get important algorithms and sensitive data of software by static analysis or reverse engineering. Software protection becomes an important problem. The algorithm of code obfuscation based on class splitting is proposed that uses of obfuscation technology. The definition of class splitting and realization on algorithm are described. At the same time, the performance on algorithm is analyzed. The obfuscation method enhances the degree of complication about program and static analysis becomes more difficult. The algorithm is applicable to object-oriented program with class structure.
The Influence of Loaded Conditions on the Interior Ballistic Performance
Authors: Zhu Yu Quan , Qin Lei , Ma Bao Ji
Published: December 2012

This paper mainly studies the change rules of interior ballistic performance under different loaded conditions, especially the maximum pressure and the muzzle velocity. There are six parameters affect the performance. The results show that, changing one of the all parameters, the maximum pressure and velocity will be increased with the increase of propellant shape coefficient χ; increased with the charge increases; increased as the propellant force increases; decreased with the chamber volume becoming bigger; increased with the engraving pressure increases; the maximum pressure increases while the velocity decreases with the mass of the projectile increases. In order to improve the interior ballistic performance, these loaded conditions must be paid attention.
Analysis on Communication Performance for Secondary Users Classified in Cognitive Radio Networks
Authors: Wang Shan Shan , Luo Xing Guo , Li Bai Nan
Published: December 2012

Cognitive Radio Networks is an effective technology and a hot research direction which can solve the problem of deficient resource and revolutionize utilization. In order to enhance the communication efficiency, secondary users are classified by some strategy. We exploit the queuing theory model to research on the communication performance of secondary users, considering primary user as the first grade user and secondary users as other grades users. The research results indicate that the users which have lower priority level are more sensitive than those have higher priority level when primary user appears. Under Primary User Emulation Attack (PUEA), if the number of secondary users reaches 300, the waiting time would larger than 15 minutes. And if the appearance rate of PUEA reaches 4, the break-out rate would be 80%, which is much harmful for CRN.
Technique of Code Obfuscation Based on Class Structure
Authors: Sun Yong Yong , Huang Guang Qiu
Published: December 2012

Software protection technology is necessary for software security and property right of software. The algorithm of code obfuscation based on class is proposed that uses of obfuscation technology. The overall architecture of the system is hidden by changing the class diagram for class aggregation, and the algorithm of class aggregation can be used to design class hierarchy in object-oriented program. It makes static analysis difficult while preserving function of program. The interfaces replace original classes to achieve reference in order to implement type hidden, and automatic analysis becomes more difficult.
The Typical Case Study of the Electronic Product Reliability Enhancement Testing
Authors: Peng Hai Xin , Kang Rui
Published: December 2012

Based on the most advanced reliability engineering concept, the paper explored a cost-effective RET testing method aiming to solve the defects found in early design, manufacturing process and components. Three cases were presented in this paper that demonstrated the complete process of how to stimulate and eliminate defects. The solid firsthand case analysis has yield valuable experiences that could benefit electronic products reliability enhancement testing.
Analysis and Research on Merging Handcraft into Graphic Design
Authors: Zhao Jin Mei
Published: December 2012

All kinds of information are instantly available and get accepted and approved by the masses under the rapid development of science and technology in nowadays. With the advent of computers and various design softwares, designers spend a lot of time finishing their designs by computers, traditional manual design in the filed of graphic design has almost been superseded by computer design and handcraft and other various approaches have fallen out of favor in the current design field. People also agreed that design's main purpose is to express a thought, provide an idea or create a form, but people tend to neglect handmade craft’s active role of expressing individuation, originality and taste in the course of design and creation.