bluuebunny/crossref_metadata_2025 huggingface dataset:
Description of Rotor's Position of Magnetic Suspension Spherical Reluctance Motor and Detection Research
Authors: Xu Zheng Jie , Zeng Li , Chen Fang
Published: June 2012

Detecting rotor position is an important part of work of magnetic suspension spherical reluctance motor． It contains rotor's position and orientation detection． This paper creates three-dimensional coordinate system on spherical reluctance motor， derives the description of the rotor's position and orientation and proposes a method for calculating rotor's position based on radial displacement sensors and angular displacement transducer． It also uses this approach and the spherical geometry relation to calculate orientation matrix of rotor according to the data from the sensors， so we can work out the position of any point through the rotation of coordinate system and position transformation．
Research on Damage and Bending Properties of AZ31 Magnesium Alloy
Authors: Xie Xi An , Quan Gao Feng
Published: June 2012

Through the four-point bending test of lath-shaped heat treated AZ31 magnesium alloy, the bending properties and damage characteristics were explored. The results show that the optimal bending strength of the magnesium alloy were 355.1MPa and 259.2MPa for extruded and cast samples, respectively, after corresponding heat treatment with 350°C, 90min and 400°C, 30min. The initial cracks both occurred at the loading point after applied load exceeded the yield limit of AZ31 magnesium alloy. Surface bump, cracks and other damage morphology accompanied by a large number of twinning organizations were found on the surface of the samples.
Studies on Bleaching and Scouring of the Jade Fiber Knitted Fabric
Authors: He Wen Juan , Meng Jia Guang , Wang Ya Wei
Published: June 2012

The knitted pretreatment has a great influence on the dyeing process. It should adopt different pretreatment process for different material. As the article selects jade fiber and cotton blended yarn to achieve good dyeing effect，the scouring is considered as the first and then bleaching. This article mainly studies the bleaching process.
Study of Pre-Processing Technology for Zinc Alloy Die-Casting Numerical Simulation on Flow-3D
Authors: Shen Jiang Nan , Lai Liu Lang , Li Yan Ping
Published: June 2012

The technologies of computer numerical simulations on casting process has penetrated into the every field of shape process, and offer a efficient tool for casting technological design. The paper briefly introduces the characteristics of the Flow-3d software on the principle and function, which is superior to that of other casting simulation software. Then, many die casting casts have been modeled and simulated, focus on the content of Pre-processing, summed up the major principles and skills on STL Import, Mesh Building and Control parameters selection of Flow-3D software by using the means of analogy.
Study on Plasma Arc Surface Hardening of Alloy Cast Iron
Authors: Wang Ya Hui , Ren Bao Chen , Yang Ji Hong
Published: June 2012

Plasma arc was used as a heat source to make a surface quenching on alloy cast iron, and orthogonal test was used to optimize the surface hardening technological parameter of plasma arc. The influence of the technological parameters on hardness and depth of the hardening layer was analyzed, and the microhardness and the microscopic structure condition after being disposed were also analyzed and discussed.
Synthesis and Characterization of Polyaniline Nanotubes Doped with Amino Acetic Acid
Authors: Bai Xue Lian , Mei Jian Ting , Bai Yun , Mu Zhong Guo
Published: June 2012

Doped polyaniline (PANI) nanostructure has been prepared at room temperature using amino acetic acid (AA) as dopant and ammonium persulfate (APS) as oxidant by a self-assembly method. The structure and property of polyaniline nanostructure were characterized by SEM, TEM，IR and X-ray diffraction (XRD) and applying the 4 probes method. The results showed the production was PANI. The effect of molar ratio of AA to An affected the morphology of the product and room template conductivity of the products were studied.
Synthesis and Performance of Dopa-Modified Multiwalled Carbon Nanotubes
Authors: Wang Lu Zhi , Yu Lin , Cheng Xiao Ling , He Jun , Lin Le Jia , Fang Tian
Published: June 2012

The Dopamine-modified multiwalled carbon nanotubes (MWNT-Dopa) were synthesized by chemical reaction between dopamine (Dopa) and multiwalled carbon nanotubes which oxidazed by mixed-acid (MWNT-COOH). The structure of MWNT-Dopa were analyzed by Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric (TG), Transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques and the dispersity of MWNT-Dopa were studied by Dispersion stability analyzer. The results show that dopamine has been grafted on multiwalled carbon nanotubes successfully, and a dopamine layer which wraps on the surface of multiwalled nanotubes make multiwalled nanotubes have outstanding dispersity in water.
Synthesis, Crystal Structure and NLO of a Pb(II) Coordination Compound Based on HO-H2BDC
Authors: Liu Xi Hui , Zhuo Xin , Zhang Li
Published: June 2012

A new three-dimensional Pb(II) coordination polymer, [Pb3(O-BDC)2]n (1) (HO-H2BDC = 5-Hydroxy-1,3-benzenedicarboxylate), has been solvothermally synthesized from the reaction of HO-H2BDC, Pb(NO3)2•6H2O and NaAc. Single-crystal X-ray diffraction analysis reveal that polymer 1 exhibit a unprecedented 3D structure and ligand HO-H2BDC has been observed to exhibit a new coordination mode. The third-order nonlinear optical (NLO) properties in DMF solution have been studied by Z-scan technique using 8 ns laser at 532 nm. The results reveal that the new compound exhibits strong NLO absorption effect and self-focusing refractive performance (α2 = 1.2 × 10-10 mW-1; n2 = -2.4×10-17 m2•W-1).
The Effect of Component Distibution Varition on Bending Modulus of Gradient Interpenetrating Polymer Networks (IPN)
Authors: Mu Zhong Guo , Bai Xue Lian , Luo Yi Ding , Zhang Ming Hu
Published: June 2012

In the paper, the mathematic model of bending modulus was established by means of classic mechanical theory, Layer number and gradient factor K were used to control component distribution of gradient IPN. Polyurethane(PU)/Epoxy(EP) gradient IPN with different component distribution were prepared , The effect of component distribution variation on bending modulus of gradient IPN was studied. The results indicated that bending modulus of gradient IPN decreased with increase of layer number n and gradient factor K, the gradient factor K had greater effect on bending moulus of gradient IPN than layer number. The results were explained according to bending rigid coefficient distribution of singel layer calculated by the mathematic model.
The Primary Study on PLA/Tencel Nonwoevn Fabric
Authors: Lou Ching Wen , Lu Chao Tsang , Chen Yueh Sheng , Lin Meng Chen , Li Ting Ting , Lin Jia Horng
Published: June 2012

Polylactic acid (PLA) is often applicable in biomedical because in environment it degrades into carbon dioxide and water. This study aims to prepare sandwich-structure PLA/ Tencel composite nonwoven, following by its property test for evaluating effect on wound dressing. In this study, PLA fibers, blended with Tencel fibers, were made into nonwoven fabrics based on nonwoven processing technology. After that, their tensile strength, tearing strength and softness were tested for evaluating nonwoven fabric properties. The result displays that, PLA nonwoven fabrics show higher tensile strength and tearing strength than Tencel nonwoven fabrics.
Thermodynamic Analysis and Observation of Inclusions in RE-2Cr13 Stainless Steel
Authors: Liu Xiao , Wang Long Mei
Published: June 2012

The effect of Ce on modifying inclusions of 2Cr13 stainless steel was studied by metallographic examination, SEM and electron spectroscopy. Thermodynamic calculation was used to analyze the formation of RE inclusions in 2Cr13 stainless steel. The result shows that MnS can be entirely replaced by Ce2O2S and CeS that are spherical.
Tribological Behavior of PTFE Nanocomposites Reinforced with PBA Grafted Alumina Nanoparticles
Authors: Niu Yong Ping , Li Xiang Yan , Zhang Jun Kai , Han Ming , Zhang Yong Zhen
Published: June 2012

Polybutyl acrylate (PBA) grafted alumina nanoparticles were synthesized. Polytetrafluoroethylene (PTFE) nanocomposites reinforced with PBA grafted nanoparticles were prepared by compression molding. The effects of PBA grafted nanoparticles on the tribological behavior of the PTFE nanocomposites were investigated on a tribometer. The abrasion mechanisms of the PTFE nanocomposites were investigated by scanning electron microscopy (SEM) of the abraded surfaces. The results show that the addition of PBA grafted nanoparticles maintains low friction coefficient and improves the wear resistance of the PTFE nanocomposites.
Friction and Wear Studies on Polyphenylene Sulfide Filled with a Complex Mixture
Authors: Guo Li , Zhu Huan Qin , Sun Yuan Bao
Published: June 2012

The tribological behavior of PPS filled with molybdenum-concentrate (MC) deposit from Armenia was studied. The deposit MC was a complex mixture of compounds such as MoS2, SO2, CuS, Al2O3, and others. Whereas MC as the filler in particulate form reduced the steady state wear rate of PPS, the optimum reduction in wear was found to occur with the addition of PTFE along with PPS. The behavior of PPS composites made with MC and PTFE sliding against a steel counterface was investigated as a function of the MC and PTFE proportions, sliding speed, and counterface roughness. Of all the above factors, the change in MC proportion, while PTFE was also present, had the greatest effect on the reduction in wear rate. The variation of the coefficient of friction was found to be in the narrow range of 0.27-0.33. The lowest wear rate was found in the case of PPS+ 17vol.%MC+10vol.%PTFE composite sliding at 1.5 m/s against a counterface roughness of 0.1 μm Ra.
Numerical Simulation of the Temperature Field in Multi-Layer Powder-Feeding Laser Cladding Forming
Authors: Zhang Jun , Song Jian Li , Li Yong Tang , Chen Fei
Published: June 2012

The numerically simulation of temperature field was carried out by the ANSYS software in multi-layer powder-feeding laser cladding forming.3-D finite element model was found, which nonlinear characteristics of the material thermal properties and the boundary conditions of the convective transfer heat was considered; The process of powder falling into the substrate and cladding element growing was accomplished by “Element Birth and Death technology” in the process of numerical simulation. The result shown that the primarily solidified cladding layer to the following cladding layer has a preheating function in the process of multi-layer laser cladding forming, the initial temperature of following cladding layer is higher than primarily melted cladding layer; The thermal cycling curves of the molten pool nodes takes on periodic variation and basic similar in every layer cladding; The end effect problem is apt to happen in cladding layer, which the phenomenon of edge collapsing or partially burnt is formed; The temperature gradient distribution is divided into two parts, the temperature gradient level distribution along the laser scanning direction in the top and perpendicular distribution in the bottom, The temperature gradient appearances mutation and maximum value in the junction of the substrate and cladding layer, which the crack is apt to be caused in this region.
Preparation and Pore Structure of Jute-Based Activated Carbon Fibers by Microwave Assisted H3PO4 Activation
Authors: Liu Qi Xia , Ji Tao , He Li Fen , Gao Qiang
Published: June 2012

Various jute-based activated carbon fibers were prepared by using jute fibers as raw materials, phosphoric acid as activating agent and activated by microwave heating. The effects of phosphoric acid concentration, microwave radiation power and microwave radiation time on the adsorption properties of activated carbon fibers were investigated to obtain optimum preparation conditions. The pore structure analysis of the activated carbon were carried out on a ASAP 2010 Surface Area and Porosimetry Analyzer. Results showed that optimum preparation conditions were phosphoric acid concentration of 4 mol/L, microwave radiation power of 385 W and microwave radiation time of 10 min. The iodine adsorption value of jute-based activated carbon fiber prepared under optimum conditions is 938.54 mg/g, the specific surface area was 1154.91 m2/g, the pore volume was 0.5997 cm3/g and the adsorption average pore diameter was 2.0772 nm. Majority of large holes in JACF prepared under optimum conditions were distributed in the diameter range of 2-4 nm, demonstrating a mesoporous structure.
Curing Kinetics of Phenol Formaldehyde Resin Modified with Sodium Silicate
Authors: Sun Jin , Zhu Xiao Feng , Wang Xiao Bo , Lin Rui Hang , Gao Zhen Zhong
Published: June 2012

The curing kinetics of PF resin modified with sodium silicate had been investigated by differential scanning calorimetry (DSC). The kinetic analysis was performed at heating rates of 5, 10, 15, and 20°C/min，respectively. The kinetic parameters such as reaction order and activation energy were solved by Kissinger and Crane equation. The relationship between curing temperature and heating rate was also investigated. The activation energy and the curing reaction order，which were obtained by kinetic calculation, are 83.00kJ/mol and 0.917, respectively. The curing reaction kinetics equations were built by the obtained best curing temperature, reaction order, pre-exponential factor and reaction rate constant.
Disturbance Suppression in Attitude Control of Raft System Using Air Spring
Authors: Lv Zhi Qiang , Shi Liang , Zhao Ying Long
Published: June 2012

Though air spring greatly improves the isolation efficiency of raft isolation system, the technological problem occurs as how to maintain raft attitude balance. This paper set up an analysis model of raft attitude disturbance, and analyzed the influence of various disturbance sources on raft attitude, including hull rolling, systematic load variation, and air spring leakage. It proposed to control raft attitude through adjusting the pressure of air spring isolator, and then studied the feasibility of this method. The results show that the influence of various disturbance sources could be canceled effectively by adjusting the pressure of air spring isolator, thus maintaining attitude balance.
Moving-Average-Based CNC Simulation System with NC Instruction Interpretations
Authors: Song Fang , Hao Shuang Hui , Hao Ming Hui
Published: June 2012

The paper presents a novel acceleration/deceleration (acc/dec) control algorithm based on moving-average. The proposed algorithm makes use of the moving-average method to dispose the velocities of all the discrete points obtained by linear acc/dec control algorithm. The acceleration curve is continuous and the speed curve is smooth obtained by this method. Furthermore, the proposed algorithm has easier calculation to achieve. Therefore, CNC simulation system with NC instruction interpretation is established based on this proposed algorithm. The system not only simulates the executive process of NC program files, but also realizes the simulation of speed and acceleration curve, process time and distance with the unit of controlling period. At the same time, the simulation system considers the acc/dec control of feed speed therefore the simulation time equals the real process time. Those will be the value of the instruction to the process of the real machining.
Research on Embedded Roundness Measuring System
Authors: Zhu Jin Fang
Published: June 2012

This article studies the embedded SPC and its application in roundness measuring system by analyzing the current roundness measurement principle and technology. With analyzing the process of data collection, date treatment and various kinds of tool graphic construction, we study the feasibility of integrating SPC into roundness measurement and finally apply the embedded SPC as pure software into roundness measuring system. We design the roundness measuring system based on embedded SPC and develop the roundness measuring system of low power consumption, high accuracy and easy application, which is suitable for industry field usage.
Offline Programming for an Arc Welding Robot with Redundant DOF
Authors: Chen Huan Ming , Liu Zhou Ping
Published: June 2012

To raise the programming efficiency of arc welding robots, the offline programming system was developed for a Motoman-UP20 robot with redundant degrees of freedom in VC++ integration environment. The system consists of kinematics analysis, motion simulation, welding trajectory plan, welding parameters plan and job file generating module. It can plan the motion path and posture of welding gun for saddle-shape seams, and display the workpiece on the interface synchronically. Job instructions can be made step by step, or generated automatically. Kinematics simulation module and communication module are integrated together, and job files can be exchanged between PC and robot controller via Ethernet to realize remote control.
Dynamic Strength and Fatigue Reliability Analysis of Breech Based on FEM
Authors: Hua Bin Bin , Ma Ji Sheng , Wu Da Lin , Yao Jia Jun
Published: June 2012

In the process of strength and fatigue reliability research of breech, finite element model of breech was established with the finite element software ABAQUS. Then the maximum stress of breech in the recoil process was obtained through FEM dynamic analysis, and the calculated results indicated that the breech strength design met the requirement. Take dynamic stress course as the load spectrum for fatigue life prediction of breech in fatigue analysis software. The study provides a useful reference for breech design and optimization.
The Mechanism Optimization Design of Multifunctional Mobile Electric Bed-Chair
Authors: Xin Shao Jie , Zhang Huan Huan
Published: June 2012

Multifunctional mobile bed-chair is designed base on human body engineering principles, it has several functions such as mobility, sitting up, bend knees and sleeping flat. We determine the size of components in both back raising mechanism and bend knees mechanism with geometric mapping method to satisfy the requirements of movement and work space. With the soft of ADAMS to optimize and simulate the motion of the bed-chair, the optimization goal is minimization of maximum value of the angular acceleration of both the back rod in back raising mechanism and leg rod in bend knees mechanism. Finally, we got the satisfied size of mechanisms.
Flexibility of Flapping Rotor Wing and its Effect on Aerodynamic Characteristic
Authors: Lu Jing , Fan Ning Jun , Wang Yi Wei
Published: June 2012

In the previous study, the rigid model of flapping wing rotor ignores the flexible factors to describe its in detail. So a new flexible wing model is established here to further study the aerodynamic characteristic of this wing. And a variable-speed factor is taken into account in this new model too. It is found that the deformation position and amplitude are both useful to increase aerodynamic force. The variable-speed factor has a significant effect on aerodynamic characteristic. In the end, the results show the flexible wing has much better performance than rigid one.
Influence of the Surface Tension of Edible Ink to Piezoelectric Ink-Jet Printing Drop State
Authors: Sun Jing Mei , Wei Xian Fu , Huang Bei Qing
Published: June 2012

Ink-jet printing technology is the mainstream of digital printing, and piezoelectric ink-jet printing is the main ink-jet printing at present, besides, drop’s injection and controlling technology is the key to the development of ink-jet printing technology. The surface tension plays an important role in the drop’s generation process, it will restrict the length and the state of the drop, further influence ink-jet printing quality. Six edible ink samples with different surface tension are prepared in order to research the influence of the surface tension to the piezoelectric inkjet Printing drop state, then the drop state is observed and its speed and volume are measured through drops observatory. The result shows that the speed of drop is higher if the ink’s surface tension is lower, but the drop is easier to gather into spherical drop and it also has smaller tail length and bigger volume.
Investigation of the Influence of the Roll Surface on the Cast Strip at the Casting Using a Vertical Type High Speed Twin Roll Caster
Authors: Yamashiki Takuya , Haga T. , Kumai S. , Watari H.
Published: June 2012

A vertical type high speed twin roll caster can be cast an aluminum alloy strip directly from a melt at high casting speed. However defects of the cast strip occurred at faster roll speed, which includes small cracks on the cast strip and unsoundness thickness distribution. They are related to contact condition of roll surface and melt. In the present study, a grooved roll was used to eliminate the defects and adopted in terms of the cost saving. We experimented using several grooved rolls with different patterns. When the groove width was 0.45mm; depth 0.2mm; pitch 0.1mm and 1.0mm, stable casting was possible. The shape of bulge was formed on the cast strip surface by the grooved roll. As a result of color check, we found that the grooved roll eliminate the small cracks. We stopped the rotated roll during the casting to observe the contact condition between the melt and the roll, and confirmed how the bulge was formed. The as-cast strip with the bulge was able to cold rolling.
A Domain Decomposition Method for Forced Vibration Analysis of Joined Conical-Cylindrical-Spherical Shell
Authors: Wu Shi Hao , Qu Ye Gao , Hua Hong Xing
Published: June 2012

Based upon the Reissner-Naghdi-Berry shell theory, a semi-analytical domain decomposition method is presented to analyze the forced vibration of a joined conical-cylindrical-spherical shell with general boundary conditions. The joined shell was divided into some conical, cylindrical and spherical shell segments along the axis of revolution. The constraint equations derived from interface continuity conditions between two adjacent shell segments were introduced into the energy functional of the joined shell. Displacement variables of each shell segment are expressed as a mixed double series in the forms of Fourier series in the circumferential direction and Chebyshev orthogonal polynomial in the longitudinal direction. The forced vibration response of the joined shells subjected to various harmonic excitations and boundary conditions was calculated and compared with those FEM results obtained by finite element software ANSYS to confirm the reliability and accuracy of this analytical solution.
Modeling and Algorithm of Adaptive Gas Cooling Subsystem for Direct Metallic Component Manufacturing
Authors: Zou Hai Ping
Published: June 2012

In this paper, the influence of thermal accumulation on the deposition trajectory quality during the plasma deposition process was investigated. The energy balance model in the deposition process was analyzed and an adaptive gas cooling subsystem to diminish thermal accumulation during manufacturing process was developed. The subsystem consisted of gas cooling rotation device driven by step motor and a special CAM program. Experiments were carried out to verify the validity of the adaptive gas cooling subsystem. Results showed that the application of adaptive gas cooling subsystem effectively suppressed the thermal accumulation during the manufacturing process and eliminated the collapsing of the deposition trajectory.
Non-Uniform Motion Mechanisms Utilized in a Twin-Rotor Piston Engine
Authors: Deng Hao , Pan Cun Yun , Wang Xiao Cong
Published: June 2012

Non-uniform motion mechanisms (NUMM) utilized in a Twin-rotor piston engine (TRPE) are introduced. TRPE mechanism consists of two major components. One is energy conversion system (ECS), and the other is differential velocity drive mechanism (DVDM). DVDM is composed of NUMMs and ordinary gear train in this paper. NUMMs generate two non-uniform rotations with same pattern and different pace. Gear train duplicates the two rotations and causes the two rotors rotating with periodical oscillation.
Numerical Simulation of Cylinder Part Based on Dynaform
Authors: Hu Ze Hao , Liu Juan , Wang Nan
Published: June 2012

The forming process of a typical cylinder part is simulated by the platform of Dynaform. The influence of blank holder force (BHF), punching speed and clearance between punch and die on the quality of forming part is assessed by the orthogonal experimental method. The value of BHF of 20KN, punching speed of 2000mm/s and clearance between punch and die of 1.1mm which are the optimized parameters value are obtained.
Numerical Simulation Study on Airflow Structural Characteristics in Real Human Airways Model
Authors: Sun Dong , Li Fu Sheng , Xu Xin Xi , Liu Ya Jun , Tan Shu Lin
Published: June 2012

The transient airflow movement has tremendous effects on aerosol deposition in human airways． The understanding of the characteristics of the transient airflow movement in human airways plays a very important role in analyzing the aerosol deposition patterns．Computational fluid dynamics(CFD)was used to simulate the transient airflow movement in generations G1-G3 of real human airways model under light activity conditions，the transient airflow patterns in the middle plane and cross sections of the airways were discussed．The results showed that in the subglottic of jet of air in the trachea front wall is formed in the air, the air at around 9.96 m/s, in trachea rear form flow separation phenomenon, along with the increase of the distance with the subglottic, tracheal inside and outside wall airflow velocity difference gradually decreased, but before the trachea wall flow speed or to be higher than the back wall of the air speed; expiratory flow into the bronchial, endobronchial forming centre air in the air distribution of higher status, level 2 level 3 endobronchial air speed the most about 2.71 m/s,.In the bronchial bifurcate place, airflow happen intersection phenomenon, intersection cause at the center of the low speed area formed bifurcation, and join the level of airflow bronchial produce temporary two air at high speed.
Optimization Design of DVG850 Worktable System Based on ANSYS Workbench
Authors: Yi Jiang Miao , Gao Dong Qiang , Zhang Fei , Lin Huan
Published: June 2012

The finite element model of worktable system is created and modal analysis is made with ANSYS Workbench by taking DVG850 high-speed vertical machining center worktable system for example. We make modal analysis of single-screw strength general reinforcement worktable system and get the natural frequency and the vibration mode.Then in order to improve the system's natural frequency, the scheme of dual-screw worktable system is put forward. Also natural frequency and vibration mode is got. Finally, it is proved that the performance of dual-screw worktable system is significantly better than the single-screw one. This provides a reliable reference for further study on dynamic analysis of worktable system.
Optimization of Hardpoints of Independent Air Suspension Based on ADAMS
Authors: Zuo Jia , Tang Ying Shi , Wang Wei Cai , Fu Jian Chao
Published: June 2012

According to the problem that serious wear tire occurring in the process of producing a small number of certain urban buses, the paper applied adams software to build a virtual prototype topologic model based on former independent air suspension, and then the paper made a simulation analysis of the independent air suspension kinematics, to optimize the absolute value of the front wheel track and the absolute value of wheelbase change. Finally, the tests demonstrate that the optimization design method worths promoting
Optimum Design of the Support Structure of the CMG Based on CAE
Authors: Gao Yong Xin , Yang Dong , Liu Zhi Jia
Published: June 2012

A Control Moment Gyroscopes (CMG) is a torque generator for attitude control of a high resolution and high agility satellite without any increase in power, mass or volume. In this paper, a new support structure of the CMG is proposed. According to the configuration idea of the CMGs, the original design model of the support structure is established. Furthermore, the topology optimization is performed by the FEM software ANSYS and after that came up with a suitable layout of the support structure of the CMG. Based on the optimized design results, the 3D models of the CMG and its support structure are established by the 3D design software Pro/E. Frequency of the assembly is analyzed and calculated. Finally, took the launch dynamics environments into consideration, the vibration testing are carried out to verify the rationality of the new design structure.
Accurately Parameterization Modeling and Thermo-Mechanical Coupling Analysis of Spiral Bevel Gears of Reducer
Authors: Wang Huan Mei , Tang Ying Shi , Gong Yong Liang , Sun Peng Fei , Chi Lin
Published: June 2012

Based on the modeling characteristic of spiral bevel gears, an accurately UG parametric model was established. The single-conditional finite element analysis method cannot satisfy the need of research under the realistic complex environment. Therefore, a thermo-mechanical model was built in the MSC.MARC Software. The contact region, contact stress, bend stress of dedendum and the change of the temperature were calculated. Some comparisons were done between these two methods. The result shows that the method was more feasible, and could provide a reliable basis for the further optimal design.
Research and Application on Fault Simulation Technology Based on Virtual Prototype
Authors: Yang Yan Feng , Zheng Jian , Di Chang Chun
Published: June 2012

Aiming at the present application of fault simulation technology based on virtual prototype, virtual prototype technology and fault injection technology were studied and analyzed, and the fault injection technology was improved. Taking a mechanical system as research subject, the mechanism of fault caused by a spring's fatigue failure was analyzed. The system's dynamic response of different fault phases was analyzed based on the system's virtual prototype. Finally, the occasion of fault occurrence, spring's stiffness dropping to between 90% and 91% of primary value, is confirmed. The simulation result provides characteristic information for preventing and diagnosing fault.
A Study on Characteristic Line of Auto Modeling Based on Rhinoceros
Authors: Zhu Yun Feng
Published: June 2012

This paper made an analysis by extracting characteristic line of key positions from the complicated and subtle surfaces of auto shell with the help of measuring tool and curve detection tool in a 3D modeling software, Rhinoceros. A research was made on the proportion of auto’s key nodes and curvature variation of characteristic line as well as its relation with optical effect on auto’s surfaces. Finally, this paper verified the feasibility for research on characteristic line of auto modeling by Rhinoceros. And it is expected to come to general rule for auto’s surface modeling through analysis of characteristic line.
Research on Accuracy Design of Mechanical Design
Authors: He Fa Wei
Published: June 2012

Abstract. Mechanical design contains three part: firstly, organization design; according to working requirement of machine, properly choose transmission form and executive body, so as to realize mechanical movement, and the result is showed by mechanical movement diagram. Secondly, structural design; according to machine’s load level, Meeting the request of mechanical strength and service life consider Structure technology and assembly processes, and determine the machine’s parts and assembly drawings. And thirdly, accuracy design; according to the function requirement of machine, select the appropriate dimensional accuracy, shape accuracy and surface roughness, in order meet the requirement, raise product quality, and reduce costs at the same time. There has already been plenty of paper dealing with organization design and structural design, but very few dealing with accuracy design.
Research on Air Conditioning System Minimum Fresh Air in Textile Workshop
Authors: Yang Rui Liang , Xiong Ya Fei , Zhou Yi De
Published: June 2012

Confirming method of minimum fresh air in air conditioning system of textile workshop is studied. Two types of existing confirming methods and emerging problems are analysed. On this basis, concept of the indoor air refreshing degree is introduced, through combining practical situations including labor intensity, workshop temperature, ventilations type and labor density in textile workshop, the new method of confirming minimum fresh air is put out. Taking a spinning workshop as example, the minimum fresh air is calculated, which shows that the new method not only insure air quality but also reduce fresh air consumption.
Research on Efficiency Model of the Variable Hydraulic Pump Based on System Identification
Authors: Li Xiang Sheng
Published: June 2012

For the complication and imprecision of the calculation of efficiency about variable hydraulic pump, based on system identification theory and thought of identification with the modeling，the general polynomial expression is proposed to describe the efficiency of variable hydraulic pumps and the functional relationship between parametric and to set up the model using the least square method of parameters identification, and calculation model of the efficiency is established as an example for a type of axial piston variable hydraulic pump, the model is verified by the experimental data, and it’s fitting accuracy is over 87%.
Simulation of Sound Generation by Flow over a Cavity with the Lattice Boltzmann Method
Authors: Han Shan Ling , Yu Li Sha , Wang Gui Shen , Zeng Qing Liang
Published: June 2012

The fluid flows and its related aerodynamic noise are very common in the nature and the engineering fieds. Lattice Boltzmann Method (LBM), which is based on the mesoscopic models, is a new CFD approach. It has the congenital superiority and the inestimable development potential in the simulation of complex fluid flow. Referring to the experimental results provided by NASA/CP 2004-212954, the aerodynamic noise produced by the flow through a cavity is simulated by the lattice Boltzmann method. The results had vividly demonstrated the shear layer oscillations, the couple between the shear layer oscillations and cavity resonance pattern. This simulation has discovered that the shear layer oscillation is the main reason for the production of cavity aerodynamic noise. The simulation results are consistent with the NASA experiment data.
Simulation on Stress Distribution of Drill Pipe’s Surface Initial Crack
Authors: Liu Yong Gang , Li Fang Po , Ye Ding Peng , Teng Xue Qing
Published: June 2012

Abstract: In drilling process, drill pipes’ out surface always have lots of pits and scratches due to the corrosive and erosion of mud or wear of well wall in work environment. Through establishing drill pipe’s working model and constitutive equations with Finite Element Analysis Software, the paper have simulated stress distribution on drill pipe body under two different condition that without mechanical damage and with initial crack. Analysis results show that the maximum stress increases with the increasing of initial crack depth, and the maximum stress position turns to crack circumferential root from the crack radial root with the increasing of initial crack’s depth. The analysis result is completely consistent with the actual morphology of crack propagation, as a result, the simulation analysis provides a effective new methods and reference for remaining life assessment and failure analysis of drill pipe.
Simulation Study of the Effect of Hydraulic Hose Parameters on Hydraulic Impact
Authors: Su Dong Hai , Bao Geng Wang
Published: June 2012

Considering the large deformation of the hose pipe diameter caused by the pressure, this paper revises the hydraulic capacity on the basis of physical model of pipe-wall, establishes the mathematical model of the hose by lumped parameter model of pipe, builds the model of the system composed of the constant pressure oil source and flow valve using Simulink software and simulates the hydraulic impact by changing the pipe diameter and length. The established hose model and simulation results can provide reference for the related research.
Stress Concentrations in Interference Fit Joints with Chamfered Hubs
Authors: Pérez-Cerdán J.C. , Lorenzo M. , Blanco C.
Published: June 2012

A change in hub geometry with the aim of reducing or even removing the stress concentrations that appear in interference fits is proposed. This modification consists in including a chamfer in the hub. Stresses distributions and stresses concentrations factors are analyzed as a function of parameters that define the hub geometry with the aim of optimizing the design of proposed modified hubs.
Stress Intensity Factor for a Plate with a Crack Stiffened by Partial Stringers
Authors: Mo Ji Yun
Published: June 2012

Stress intensity factors are calculated for a cracked plate reinforced locally subject to mode I loading. The stiffeners are considered to have both longitudinal and transverse stiffness. There is no relative displacement between the plate and the stiffener. It is considered that the shear stresses are lumped at a finite number of locations, the result is obtained by summation. The influence of the stiffener location and the stiffener relative stiffness on cracked plate is included. The stress intensity factor depends on all these factors. Case study shows that the shear stress acting parallel to the stiffener gives more effect on the stress intensity factor than the shear stress acting perpendicular to the stiffener. To increase the relative stiffness of stiffener avails to reduce the stress intensity factor of the cracked plate.
The Finite Element Analysis of Omni-Direction Side-Loading Forklift Truck Lifting System Based on COSMOSWorks
Authors: Zhou Jing Jing , Guo Ai Dong , Li Chun Hui , Lin Zhen Jiang , Wu Tie Zhuang
Published: June 2012

By setting contact sets, achieved overall analysis results of the mechanical properties with omni-direction side-loading forklift truck lifting system based on COSMOSWorks. And made an experimental measurements to omni-direction side-loading forklift truck lifting system by electrometric methods. There was a good relevance between experimental data and calculation values, and the deviation was basically within the 10 percent allowed. Finally, in this way it verified the correctness and reliability of the finite element analysis by experimental measurements. Ensured the omni-direction side-loading forklift truck lifting system could be safe and efficient to work. And also it laid a foundation for subsequent structural optimization.
The Research and Design of Horizontal Power Cutting Mixer
Authors: Zhao Xiang Xiong , Liu Jiong Hui
Published: June 2012

The environmental pollution of the rural area partly results from the excrement of sheep, cattle and poultry. In a systematic project of regulating and harnessing the excrement, the additive is applied to mix the faeces to remove the unbearable smell from livestock excreta and to make better and comprehensive utilization of the excreta. At present, the mixers at home and abroad are not applicable to mix the excrement of domestic animals for the reason that there are so many fibers in it. The shapes of sheep and cattle excrement like a ball which demands the rotor of the mixer to have the clipping function. Thus, the clipping and mixing machine is designed. Its principle, structure, technique and its main parameters are analyzed and proved in this paper.
The Study of Ink Viscosity and Ink-Transfer Relations
Authors: Chen Wen Ge , Jiang Wen Yan
Published: June 2012

In this paper, using rotational viscometer measured the viscosity of ink，using IGT printability tester complete the transfer of the ink on different paper, using the analytical balance measure the amount of ink transfer, and using transfer rate formula calculate the ink transfer rate. Using EXCEL to establish the ink viscosity and the transfer rate curve, And fitted curve equation, thus that obtained conclusion of different ink viscosity affect ink transfer on different paper.
Three-Dimensional FEM Analysis for a Kind of Engine Crankshaft
Authors: Li Hui Qin , Wang Dong , Li Yan , Zhang Xiu Li
Published: June 2012

By using SolidWorks2010 software 3d entity modeling for the engine crankshaft of the developed tobacco harvest machine was built, and Ansys system combining working conditions to crankshaft with Ansys finite element method was imported. Then the crankshaft's stress result figure in four conditions was got, the stress concentration area was found, comparing and the analysis the the working conditions of the results, thus the basis theory for the engine of the crankshaft structure optimization design and research was provided.
Research on Analytical Procedure of Failure Mechanism Consistency in Rubber Material Accelerated Ageing Test
Authors: Fu Li Jun , Zhang Wei Fang , Wang Shuang , Wang Zong Ren , Tang Qing Yun
Published: June 2012

This paper summarizes the advantages and disadvantages of existing analytical methods of failure mechanism consistency in the accelerated aging test at first. And then according to the characteristics of the rubber material, a kind of rubber failure mechanism consistency analytical method based on failure physics is offered by analyzing the thermal analysis curves.
Temperature Measurement and Simulation in Stainless Steel High-Speed Grinding
Authors: Yi Jun , Sheng Xiao Min , Feng Can Bo
Published: June 2012

Abstract. Embedded K nickel chrome-nickel silicon thermocouple was used to measure the grinding temperature of stainless steel in the cases of high-speed grinding while machining SUS304 Stainless Steel with vitrified CBN wheels in high speed grinding conditions.The energy partition is approximately 7.7% by matching the measured temperature to the analytically computed temperature. 3D FEM simulations for some typical grinding conditions are carried out.The error between the simulation analysis temperature results and the experimental results is approximately 3% on the grinding surface,and the error between the simulation analysis temperature results and the experimental results is approximately 10% below the grinding surface.
Roll Eccentricity Extraction Method Based on Comprehensive Signal Processing
Authors: Yang Yang , Wang Yi Qun , Chen Gang
Published: June 2012

In modern steel production, strip products account for more than half of the total output. Roll eccentricity is ubiquitous in strip mills, which has a periodic impact on the strip thickness difference. Roll eccentricity compensation is an important part of the automatic gauge control system. Most roll eccentricity compensations extract the roll eccentricity based on the frequency domain analysis of the rolling force. It is difficult to ensure measurement precision of roll eccentricity due to the complexity of interference of the rolling force, therefore the compensation accuracy is difficult to ensure. The roll eccentricity extraction method, based on comprehensive signal processing, was introduced in this paper combined with engineering practice. The roll eccentricity was comprehensively calculated by thickness gauge and other signals that have been delayed; the roll phases were calculated by the roll rotational displacement; and finally, the roll eccentric fluctuation of the upper backup roll and lower backup roll were extracted. The roll eccentricity could be predicted by calculating roll eccentric fluctuations and phases, in order to provide the basis for accurate compensation. According to the comparison with roll eccentricity extracted by the frequency domain analysis of the rolling force, the roll eccentricity obtained by the roll eccentricity extraction method, based on comprehensive signal processing, is more accurate. It provides a reliable basis for roll eccentricity compensation in order to improve the accuracy of the thickness of the strip products.
Microscale Effect of Elastic Beam of the Micro-Machined Gyroscope
Authors: Shen Li , Gao Shi Qiao , Zhang Zhen Quan , Jiang An Ran
Published: June 2012

A detailed analysis of the concept of strain energy density and strain gradient on the material microscale effect in a micro-machined gyroscope is carried out. By analysis, the material microscale effect mainly influences its elastic modulus. The analytical expression of the valid elastic modulus on the micro elastic beam structure of the micro-machined gyroscope is deduced. When considering the valid elastic modulus and not, respectively compare the natural frequency of the elastic beam with the actual measurement results. The error of former is far less than the latter. By the theoretical derivation and experiment test, the influence of the material microscale effect on the micro-machined gyroscope is analyzed.
Optimization Design of Disc Cam Mechanisms with an Offset Translating Negative Radius Roller Follower
Authors: Lin Rong Fu , Chang Yong
Published: June 2012

The offset optimization is one of the key elements of designing cam mechanisms. This paper presents the mechanical model of a disc cam mechanism with an offset translating negative radius roller follower and deduces the efficiency expression. Then it proposes pressure angle and efficiency integration as the evaluation index of pressure angle and efficiency respectively. Furthermore, the optimal offset is derived according to the index. Finally, an example is provided to illustrate the method to obtaine the optimal offset.
The Research on Tooth Profile Total Deviation Measuring Method Based on Coordination Measuring Machine
Authors: Li Bing , Wei Yu Lan , Jin Meng Dan , Fan Ying Ying
Published: June 2012

Put forward a method that use scatter points which got in different places to measure the involution cylindrical gears, give a mathematical model that use the discrete points to sure the total deviation of gear tooth profile. The experience results show that this way is of high precision in measurement points, measurement an error data processing less intervention, etc.
Corrosion Resistance of MgO-ZrO2 Brick and MgO-Cr2O3 Brick Compared by Rotating Slag Attacking Method
Authors: Chen Song Lin , Yuan Lin , Feng Zhong Qi , Liu Xi Jun , Sun Jia Lin , Pan Bo , Wang Jian Dong
Published: June 2012

An environment-friendly material MgO-ZrO2 brick which is hoped to substitute for MgO-Cr2O3 brick was investigated. The using effects of MgO-ZrO2 brick and MgO-Cr2O3 brick were compared by rotating slag attacking method whose environment is similar to the environment in RH degasser. It indicates that the corrosion resistance performance of MgO-ZrO2 brick is better than that of MgO-Cr2O3 brick. Due to the effect of molten steel, slag and oxygen, Fe being oxidized to FeO or Fe2O3 at high temperature 1900K will produce volume expansion which results in MgO-Cr2O3 brick being cracked. At the same time, Cr2O3 will be decomposed to CrO3 gas, which will be evaporated seriously by the airflow and lead to MgO-Cr2O3 brick structural loosen and deterioration, ultimately. While the activity of oxygen dissolved molten steel is extremely low and ZrO2 is stable in the rotary kiln at 1900K. Furthermore, ZrO2 will react rapidly with CaO and its product CaZrO3 will form dense layer to prevent MgO-ZrO2 brick from being corroded. Therefore, trial production of MgO-ZrO2 brick applied for RH degasser is recommended.
Effect of Si on AA5182 Strip Cast by a High Speed Twin Roll Caster
Authors: Haga Toshio , Komeda Kosuke , Mtsuoka Kenta , Kumai Shinji , Watari Hisaki
Published: June 2012

High speed roll casting of AA5182 aluminum alloy was tried using a vertical type high speed twin roll caster equipped with mild-steel rolls. Parting material was not used and speed was 80m/min. AA5182 strip, which thickness was 2.1mm, could be cast continuously. However, porosity occurred at center area at the thickness direction of the strip of the as-cast strip. Si was added to original AA5182 to improve the porosity at 0.2, 0.4, 0.6, 0.8 and 1.0 mass%. The porosity was improved as the content of the Si increased. The elongation resulting from the tension test was the best when 0.2mass%Si was added. The clack on the surface was improved by the increase of the Si content. Roll casting ability was improved by the Si, too.