Wanshan Wang

Northeastern University (Shenyang, China), Feng-t’ien, Liaoning, China

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Publications (118)20.07 Total impact

  • Tianbiao Yu · Xuezhi Wang · Wanshan Wang
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    ABSTRACT: In this paper, the dynamic characteristics of ultra-high speed grinding spindle system is analyzed by using digital analysis methods. The spindle system is the key components of the machine tool, and its performance directly determines the machining stability and accuracy. Liquid hybrid bearing, with its superior performance has been widely applied to high speed and heavy machine tools. In order to study the spindle system, Fluent software was used to analyze the dynamic characteristics of liquid hybrid bearing. With the increase of the rotational speed, the capacity of liquid hybrid bearing changes significantly, and the relationship between the capacity and rotational is linear in intermediate stage. At the same time, the stiffness and damping of the liquid hybrid bearing has a corresponding increase with the increase of rotational speed. When the rotational speed increase to a certain extent, the dynamic performance of the spindle system will improve. Finally, the concentrated mass method and the finite element analysis method were used to analyze the dynamic characteristics of the spindle system, respectively. The results obtained by the both methods have good consistency, and the critical speed is about 14000 rve/min.
    No preview · Article · Nov 2015 · Journal of Vibroengineering
  • Xuezhi Wang · Tianbiao Yu · Xue Sun · Ying Shi · Wanshan Wang
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    ABSTRACT: Grinding temperature is an important parameter in affecting the quality of grinding. The higher grinding temperature would cause thermal damage to workpiece. But in the actual grinding processing, it is difficult to measure the grinding temperature in real time. This paper presents the finite difference method to calculate the grinding temperature. When calculating the grinding temperature, an important physical quantity cannot be avoided; it is the energy partition and it is the fraction of the grinding energy transported as heat to the workpiece at the grinding zone. At present, there are a lot of calculation models for the energy distribution, but no one is very exact, and most models are exclusive for alumina grinding wheel grinding. Based on measuring the grinding force and temperature, the heat flux toward the workpiece can be back-calculated by finite difference method that compared the difference between the thermal model and experimental results; thus, the energy partition can be obtained. The results show that it provides a 3D graphic image of the whole temperature field by using the fused deposition modeling (FDM). And the influences of feed rate on grinding temperature and of energy partition are significant compared with the grinding speed and depth of cut. The improvement of feed rate can effectively reduce the grinding temperature, but energy partition has a significant rise. After repeated research, an approximate value of energy partition was obtained by using vitrified bond cubic boron nitride (CBN) wheel grinding titanium alloy material TC4, and it was about 5 % under dry grinding.
    No preview · Article · Sep 2015 · International Journal of Advanced Manufacturing Technology
  • Tianbiao Yu · Haonan Li · Wanshan Wang
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    ABSTRACT: As a kind of widely used optical material, optical glass BK7 is machined by first grinding and then polishing in industrial production. However, the polishing process is time-consuming and high-cost. Therefore, it is very meaningful to produce high-quality BK7 workpieces by grinding. To understand the grinding characteristics of BK7, many studies were conducted and reported. But most studies available so far had low industrial relevance and were difficult to be applied to guide real production of BK7 glass. To fill this gap, in this study, BK7 grinding characteristics are investigated and special emphasis is laid on the effects of machining parameters in terms of machined surface morphology, subsurface damage, and grinding force. Results show that wheel depth of cut plays the most important role in BK7 grinding, and a little difference of it leads to completely different material removal modes. Wheel speed is the second important parameter. It cannot change the dominant removal mode but can slightly adjust the characteristics of machined surface, subsurface damage, and grinding force. Workpiece feed rate has a small impact on BK7 grinding. From the viewpoint of industrial application, it suggests that the wheel depth of cut of 1.0 μm, high wheel speed, and high workpiece feed rate are more rational and practical because under this condition the grinding process can produce BK7 workpieces, which possess crack-free surface and sublet subsurface damage, with high removal rates and stable grinding forces. The findings of this paper are expected to be meaningful to provide the experimental references for the studies of the BK7 grinding process and guide industrial production of BK7 optical components.
    No preview · Article · Jul 2015 · International Journal of Advanced Manufacturing Technology
  • Haonan Li · Tianbiao Yu · Lida Zhu · Wanshan Wang
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    ABSTRACT: The load on grinding wheel (GW) binder in grinding process is an important issue in grinding studies. It affects binder behaviors, wheel-workpiece interaction, grinding force, heat and energy, machined surface quality, GW life, etc. However, few studies have systematically studied this topic and the conclusions proposed so far have been established on too many speculations and assumptions. To cover this gap, an analysis of loads on binder in grinding process is conducted based on discrete element method (DEM) and discontinuum-hypothesis-based grinding simulation. In the simulation, a discontinuous GW is modeled, experimentally calibrated, and validated. By the simulation, loads on binder are analyzed from the aspects of load history and force chain network. Load history results show that, according to the load patterns, binder can be classified into grain-binder and non-grain-binder. Grain-binder is the binder that is close to the grinding grains. This kind of binder periodically experiences the loads that contain the short and large impulse loading as well as long and small alternating loading. The former loading is produced by grinding process and called the loads in active phases while the latter is resulted from the high wheel speed and named the loads in inactive phases. Non-grain-binder is the binder that is ‘far away from’ grinding zone, and its loads are comparable and close to those of grain-binder in inactive phases, even the non-grain-binder does not adhere to a same grain. Force chain network analysis shows that, for different grinding phases and grain-workpiece contact statuses, grain-binder has rapidly-changing force chains in terms of length and scale. The directions of the force chains are always in line with grinding force directions. The findings in this study are expected to contribute to the understanding of grinding process and GW production.
    No preview · Article · Jun 2015 · International Journal of Advanced Manufacturing Technology
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    Haonan Li · Tianbiao Yu · Lida Zhu · Wanshan Wang
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    ABSTRACT: A simulated grinding wheel (GW), a numerical representative that describes the geometric and physical properties of realistic GWs, is the prerequisite and foundation of grinding research. However, most proposed numerical GWs treated realistic GWs as continuums without internal structure (e.g., binder and pores) and analyzed realistic GWs’ behaviors based on continuum-based material theories. To fill this gap, this study attempts to introduce a discontinuum-based method, discrete element method (DEM), into GW modeling and simulation. DEM GW simulation begins with two grinding-customized modifications to classic DEM theory. Then, with the aid of experimental measurement and statistical analysis, a DEM GW is modeled. Experimental validations are conducted thereafter. Results show acceptable agreements between DEM and realistic GWs in terms of topography, microscopic structure, fracture behavior in compressive test, and performance in grinding process. The proposed DEM GW’s ability in describing a discontinuous structure of realistic GWs covers the shortage of existing numerical GWs and might have other promising applications (e.g., GW formula optimization in production, GW preparation technology and parameter optimization, and GW wear and life prediction).
    Full-text · Article · May 2015 · International Journal of Advanced Manufacturing Technology
  • Xuewei Zhang · Tianbiao Yu · Wanshan Wang
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    ABSTRACT: The five-axis milling is widely applied to complex surface machining. When cutting forces of milling processes increase, the consequent workpiece and tool deflections may result in poor machining quality and high processing cost. There are a lot of researches on three-axis milling processes simulation, but very few about five-axis milling. To solve these disadvantages, this paper presents an integrated system containing modeling, simulation, and optimization of five-axis milling processes. The system has three major applications: (1) simulation verification of milling processes, (2) cutting forces prediction, and (3) cutting parameters (feedrate) optimization. The material removal process simulation used for verifying the five-axis milling is based on the three-dexel (depth element) model, and the cutter-workpiece engagement regions are extracted from the geometric model. According to the extracted cutter-workpiece engagement regions, the instantaneous cutting forces could be predicted. The feedrate is off-line modified for balancing the given maximum or the reference cutting forces with the predicted cutting forces on different machining steps. The developed system is validated experimentally to show that the modeling, simulation, and optimization methods could improve the accuracy and efficiency of five-axis milling processes.
    No preview · Article · Oct 2014 · International Journal of Advanced Manufacturing Technology
  • Lida Zhu · Haonan Li · Weili Liang · Wanshan Wang
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    ABSTRACT: This paper presents a different web-based virtual turn-milling system, which aims to address the common problems of existed systems. The system has not only economical value, such as shortening product cycle from design to market, but also scientific interest, like proposing a new trajectory planning method. In other words, it helps sellers and buyers better understand products and enables planners and machinists to make decision or verify CNC codes much more accurate and faster. This system is made up of three levels, which is client browser, server, and database, and every level is divided into several specified functions. Among all the functions, turn-milling simulation function is the most crucial part. To enhance the system’s features, many sub-function modules are also adopted in simulation functions. Through these modules, the system implements material removal function, tool trajectory planning function, numerical control (NC) code inputting and compiling function, and so on. To realize these functions, the whole machining system is developed by using the network superiority of Java language and Virtual Reality Modeling Language (VRML) technology interaction, which will also lead to smaller data volume. Owing to the transportability of Java language and VRML technology as well as the good understandability of the system, this web-based virtual turn-milling system is also suitable to the dynamic demonstration and machining simulation of other NC machine tools. Some future research directions are given to perfect the system in the end.
    No preview · Article · Apr 2014 · International Journal of Advanced Manufacturing Technology
  • Tianbiao Yu · Xuewei Zhang · Weili Liang · Wanshan Wang
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    ABSTRACT: This paper presents a three-dimensional, web-based, interactive simulation system for turn-milling center. To overcome the disadvantages of transferring files over the Internet and depending on expensive computer-aided design (CAD)/computer-aided manufacturing (CAM) softwares, the system is developed by virtual reality modeling language (VRML)/JavaScript interaction. The system files produced by machining simulation have small size, and could be transmitted on the web easily. Firstly, a dynamic interactive technology based on VRML and JavaScript, which is essential to a web-based simulation system, has been presented in this paper. Secondly, the geometric and kinematic model is created for representing the turn-milling center motion. Then, the key technologies for machining simulation including material removal, NC codes compiling and collision detection are studied. Finally, to validate feasibility of the proposed system, the virtual machining process for a stepped shaft in the machine tool is carried out. Since the system realizes multiple dynamic demonstrations of virtual machine tool, users can comprehensively understand the product performance. The research for the web-based virtual system of turn-milling center has important research value and application prospect.
    No preview · Article · Aug 2013 · International Journal of Advanced Manufacturing Technology

  • No preview · Article · Apr 2013 · International Journal of Advancements in Computing Technology
  • Lida Zhu · Chunxia Zhu · Qingxin Xue · Xiaobo Ma · Wanshan Wang
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    ABSTRACT: Aiming at the problem of the varying chip thickness and depth due to the complex motion in orthogonal turnmilling, the mathematic models describing relationship between cutting parameters were founded based on orthogonal turn-milling principle, and chip formation was generated by both the peripheral cutting edge and the face edge of cutter. In order to master the inherent rules of chip formation, the effect of cutting parameters on chip formation by orthogonal turn-milling were conducted by experiment in turn-milling process. It is shown that two sorts of chip formations with sawtooth are gained respectively in non-eccentricity and eccentricity machining process. The axial feed rate and the speeds cutting tool and workpiece are some important parameters of effect chip formation. The adiabatic shear takes place inside the chip by analyzing topography by orthogonal turnmilling, which the cause of sawtooth chip formation is local catastrophic shear. Therefore, it provides theoretical guidance and reference for the research on orthogonal turn-milling mechanism.
    No preview · Article · Jun 2012 · Journal of Computational and Theoretical Nanoscience
  • Tianbiao Yu · Guoqiang Ma · Tianhua Wei · Wanshan Wang · Xingjun Qin
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    ABSTRACT: The Rigid Internal Fixation is one of the commonly used methods to reconstruct the mandible in bone repair surgery. This research proposed a complete flow of the designing and Finite Element Analysis (FEA).The customized titanium plate and screws model were imported in Mimics, then fitted and simulated with the shape of mandible 3D model. The simulation model would be imported into Magic's and the screw holes were located and punched. In order to ensure the validity of model for surgical guidance, the FEA was employed by FEA software Abaqus in this study. Different angles were selected and different loads were loaded. Comparing with the nomal mandible mechanical data, the von mises stress and deformation which was from the reconstruction of mandible were in the regular range and the RP model which would be used in the medical guidence was manufactured according to the 3D model. The research for this processing has important guide significance and good business prospects.
    No preview · Conference Paper · Jan 2012
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    ABSTRACT: Main bearing that plays the role of supporting and making the cutter to rotate and tunnel is the core part of TBM. Because of the harsh working conditions and complex changeful construction, the axial and radial load and environmental factors such as temperature of TBM main bearing are changing to make the fault of main bearing presenting randomness, and then the not easy identified fault may be produced. The traditional neural network model can not dynamic consider the cause of the reasons, parts and types, BP neural network fault diagnosis model based on fault reasons-signs matrix is presented in this paper. Firstly, the faults are screened through the fault reasons-symptom matrix, and the neural network structure is designed according to the screening result, then, the fault type is identified by way of model training. According to TBM main bearing fault symptoms data provided by a heavy enterprises practical engineering and MATLAB simulation validation, the feasibility and superiority of this model method are proved.
    No preview · Conference Paper · Jan 2012
  • Tianrui Zhang · Tiantiao Yu · Wanshan Wang
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    ABSTRACT: Partner selection is the critical section to the success and survival of forming and running the Agile Virtual Enterprise (AVE). This paper studies how to select the partners in an AVE can be assisted through the three phase combinatorial optimization model which can not only select good partners, but also receive the best match combination between partners of all processes. Firstly, partners are originally selected to narrow the range of potential partners. Secondly, priority of partners in all sub-tasks evaluated by triangular fuzzy number-based two-class fuzzy comprehensive evaluation is the prerequisite of the optimized combination that executed by the Ant Colony Algorithm (ACA). The ACA can select sections from the residual information adaptively to improve global search ability. Lastly, the study gives an example and its simulation result under MATLAB.
    No preview · Article · Aug 2011
  • Tianbiao Yu · Jing Wang · Tianrui Zhang · Da Ha · Wei Yao · Wanshan Wang
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    ABSTRACT: According to the idea of green manufacturing, this paper researched about CNC machine tools made of recycle and reuse toward the next 5 to 10 years a large-scale NC machine tools scrap recycling potential resources. Then it also analyses the flow chart of CNC recycling and reusing, proposed evaluation method of CNC machine tools recycling and reuse which based on fuzzy analytic hierarchy process. It establishes a comprehensive and rational recycling of CNC machine tools evaluation index system, develops evaluation prototype system for recycling CNC machine tools. This paper provides theoretical and technical reference for recycling and reuses the waste CNC machine tools.
    No preview · Conference Paper · Aug 2011
  • Peng Guan · Tianbiao Yu · Wanshan Wang
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    ABSTRACT: This paper presents a virtual system to simulate the main functions of CNC cylindrical grinding machine tool for training operation of the machine tool and simulating the grinding parameters. The system is based on VRML, Matlab Web Server and B/S structure. Users can visit the system through the IE browser with the VRML plugin. First, the paper describes the system structure and components. Secondly, geometric simulation and the relevant key technologies of the virtual CNC cylindrical grinding machine tool are presented. Thirdly, grinding parameters simulation is implemented using Matlab Web Service. At last, an example of virtual machining stepped shaft is illustrated. Compared to other CNC machining simulation methods, the method in the paper has a good man-machine interaction and does not rely on expensive CAD/CAM software.
    No preview · Article · Aug 2011 · Journal of Computational and Theoretical Nanoscience
  • Lida Zhu · Chunxia Zhu · Tianbiao Yu · Wanshan Wang
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    ABSTRACT: The Linear Rolling Guide that springs and damping units imitate joints is simulated by finite element methods to analyze accurately the dynamic characteristics of Linear Rolling Guide during the design stage. The proposed method can predict the regular pattern which joint stiffness and joint span affect natural frequency and harmonic response. The research demonstrates that the method predicts well the dynamic characteristics of the Linear Rolling Guide, therefore, the simulation method is feasible by experimental verification, which provides reference for dynamic optimal design Linear Rolling Guide in turn-milling center.
    No preview · Article · Jul 2011 · Journal of Computational and Theoretical Nanoscience
  • Tiegang Li · Chunlin Fu · Peng Guan · Tianbiao Yu · Wanshan Wang
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    ABSTRACT: Based on the analysis of the geometry and machining characteristics of aircraft structural parts, and the feature geometry is described with a hierarchical structure. A machining feature recognition method based on neutral file is presented. Firstly, geometry and topology information of CAD model in UG software is obtained from STEP AP203 interface. Secondly, features are extracted from B-rep representation of the part, and then the features, as well as corresponding geometry and topology are mapped machining feature which is utilized as standard interface for CAM. Based on these studies, a feature recognition system was developed in visual C++, which discussed the data mapping methods from AP203 to C++ system, from AP203 to ORACLE sever. The lexical analysis process of the AP203 files, the establishment and operation process of the machining feature database was developed. And the feasibility was verified by an example of structural part.
    No preview · Conference Paper · Jan 2011
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    ABSTRACT: For many problems of traditional technical services, this paper presented the networked technical services oriented the production process in order to meet the needs of modern manufacturing model. This paper focused on analyzing the user needs of production process technical services, and studied the main problems existing in the traditional mode of technical services and the features of networked technical services. What is more, it structured the main function module of the system of the networked technical services oriented production process. Finally, it researched the workflow of the networked technical services. This paper provided a reference for improving the quality and efficiency of technical services in the production process, as adopting advanced computer technology, networked technology and artificial intelligence technology.
    No preview · Conference Paper · Jan 2011
  • Hu Li · Yadong Chen · Zhiguang Zhang · Tianbiao Yu · Wanshan Wang
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    ABSTRACT: In view of the preparation of the individual implants for artificial bone grafting procedures, this paper puts forward a new kind multi-scale modeling idea for artificial bone. First, build up the corresponding macro-level CAD model of the patients based on CT data; Secondly, realize the bone’s internal property by analyzing the gray-scale of the patients’ CT image and build up the micro-scale model in Pro/E; Finally, obtain the multi-scale CAD model of the artificial bone that match with the remaining parts by combing the macro-scale and micro-scale model and convert it into STL files to complete the preparation of implants. The further mechanical analysis was finished for the structure selection of multi-scale implantation.
    No preview · Chapter · Jan 2011
  • Jianrong Wang · Kai Fan · Wanshan Wang
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    ABSTRACT: This paper models the aeroengine health assessment problem as a multi-criteria decision-making (MCDM) problem and proposes a three-step evaluation model, which combines the techniques of fuzzy analytic hierarchy process (fuzzy AHP), fuzzy preference programming (FPP) and technique for order performance by similarity to ideal solution (TOPSIS). Fuzzy AHP and FPP methods are used to determine the relative weights of multiple evaluation criteria and synthesize the ratings of candidate aeroengines. Aggregated the evaluators’ attitude toward preference, then TOPSIS is employed to obtain a crisp overall performance value for each alternative to make a final decision. To illustrate how the approach is used for the aeroengine health assessment problem, an empirical study of a real case involving eleven evaluation criteria and ten initial commercial aeroengines of Air China Ltd. is conducted. The case study demonstrates the effectiveness and feasibility of the proposed evaluation procedure.
    No preview · Article · Dec 2010 · Expert Systems with Applications