The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform

Lin Hua - One of the best experts on this subject based on the ideXlab platform.

  • A hybrid of theory and numerical simulation research for virtual rolling of double-groove ball rings
    The International Journal of Advanced Manufacturing Technology, 2013
    Co-Authors: Liang Tian, Yu Luo, Hua-jie Mao, Lin Hua
    Abstract:

    Double-groove ring rolling (DGRR) is a type of abnormal section-rolling process capable of diameter increasing and profile forming at the same time. This brings difficulties in analyzing the behavior of the rolling process thoroughly due to many influence factors. In this paper, the process parameters, including outer radii growth principle, controlling mode of Guide Roller, design method for ring blank dimension, and reasonable range of feed velocity, are studied theoretically. Then, a 3D elastic–plastic finite element model is developed using the dynamic explicit code ABAQUS/Explicit, based on the theoretical results, and the optimum blank size and feed velocity are determined. Finally, experiments are carried out that show a good agreement with the simulation results. Thus, the feasibility of the proposed method has been demonstrated. The research results provide valuable Guidelines for the selection of blank design and velocity in the actual DGRR production.

  • 3-D FE Simulation and Analysis on Radial-Axial Large Ring Rolling
    Materials Science Forum, 2007
    Co-Authors: Li Bo Pan, Lin Hua, Jian Lan
    Abstract:

    An effective method was proposed to simulate and control the motion track of Guide Roller during radial-axial ring rolling in FE simulation. The 3-D finite element model was constructed according to the principle and feature of rolling technology. The rolling process was simulated and analyzed by using dynamic explicit finite element technology. The different rolling processes with different technology parameter were simulated. The width spreads and rolling forces under different parameters are compared and analyzed. The results indicated that high quality ring product could be obtained when rational parameters in radial and axial were assigned.

  • research on following motion rule of Guide Roller in cold rolling groove ball ring
    Journal of Materials Processing Technology, 2007
    Co-Authors: Lin Hua, Jian Lan, Z J Zuo, Dongsheng Qian
    Abstract:

    Abstract Based on the actual working condition of a vertical cold ring-rolling mill rolling a groove ball ring, a mathematical model for the following Guide Roller motion is established. The variation of growth of the ring outer radius is analyzed and the Guide Roller motion is investigated. A system for Guide Roller motion design is obtained, on which a Matlab program is coded to get the required system parameters. Accurately controlling the Guide Roller motion may improve the precision of cold ring-rolling components. The model can be also used to Guide the design of cold ring-rolling mill.

Cai Dong-mei - One of the best experts on this subject based on the ideXlab platform.

  • Measuring method of ring parameters based on Guide Roller system of ring rolling mill
    Manufacturing Technology & Machine Tool, 2012
    Co-Authors: Cai Dong-mei
    Abstract:

    A new method is proposed to measure the centre location and outer diameter of the ring by the Guide Roller system of ring rolling mill. And the easily measured parameters are stroke lengths of the hydraulic cylinders which respectively drive the two Guide Rollers movement. Mathematical relationships between the center position, the outer radius of ring and the two cylinder strokes are deduced based on the Cartesian coordinate system. Numerical value of instantaneous centre location and outer diameter of the ring can be derived by putting stroke lengths of the two hydraulic cylinders, which are measured by the cylinder displacement sensor, into calculation software. In addition, whether the ring deviating from its centre or the offset the ring deviates can be shown according to the centre position of the ring. This method is easy to implement, can reduce costs and has high precision.

  • Analysis of mechanical property of Guide Roller system in large ring rolling machine
    Heavy Machinery, 2011
    Co-Authors: Cai Dong-mei
    Abstract:

    The analysis has been made in this paper for mechanical properties of a large ring rolling machine's Guide Roller system,and theoretical equation has been established for Guide roll forces under different rolling conditions and the loads born by all components in Guide Roller system,which will change along with ring products.On this basis,numerical simulation analysis is carried out for mechanical properties of ring rolling machine's Guide Roller system,obtaining variation trend of Guide roll forces in different rolling processes and the loads born by all components of Guide Roller system changing along with ring diameters and making foundations for the design of Guide Roller system and the selection of ring rolling process parameters.

Dongsheng Qian - One of the best experts on this subject based on the ideXlab platform.

  • research on following motion rule of Guide Roller in cold rolling groove ball ring
    Journal of Materials Processing Technology, 2007
    Co-Authors: Lin Hua, Jian Lan, Z J Zuo, Dongsheng Qian
    Abstract:

    Abstract Based on the actual working condition of a vertical cold ring-rolling mill rolling a groove ball ring, a mathematical model for the following Guide Roller motion is established. The variation of growth of the ring outer radius is analyzed and the Guide Roller motion is investigated. A system for Guide Roller motion design is obtained, on which a Matlab program is coded to get the required system parameters. Accurately controlling the Guide Roller motion may improve the precision of cold ring-rolling components. The model can be also used to Guide the design of cold ring-rolling mill.

Jian Lan - One of the best experts on this subject based on the ideXlab platform.

  • 3-D FE Simulation and Analysis on Radial-Axial Large Ring Rolling
    Materials Science Forum, 2007
    Co-Authors: Li Bo Pan, Lin Hua, Jian Lan
    Abstract:

    An effective method was proposed to simulate and control the motion track of Guide Roller during radial-axial ring rolling in FE simulation. The 3-D finite element model was constructed according to the principle and feature of rolling technology. The rolling process was simulated and analyzed by using dynamic explicit finite element technology. The different rolling processes with different technology parameter were simulated. The width spreads and rolling forces under different parameters are compared and analyzed. The results indicated that high quality ring product could be obtained when rational parameters in radial and axial were assigned.

  • research on following motion rule of Guide Roller in cold rolling groove ball ring
    Journal of Materials Processing Technology, 2007
    Co-Authors: Lin Hua, Jian Lan, Z J Zuo, Dongsheng Qian
    Abstract:

    Abstract Based on the actual working condition of a vertical cold ring-rolling mill rolling a groove ball ring, a mathematical model for the following Guide Roller motion is established. The variation of growth of the ring outer radius is analyzed and the Guide Roller motion is investigated. A system for Guide Roller motion design is obtained, on which a Matlab program is coded to get the required system parameters. Accurately controlling the Guide Roller motion may improve the precision of cold ring-rolling components. The model can be also used to Guide the design of cold ring-rolling mill.

Pagilla, Prabhakar R. - One of the best experts on this subject based on the ideXlab platform.

  • Control of the web lateral position and slope by employing spatially dependent transfer functions
    Oklahoma State University, 2019
    Co-Authors: Cobos Torres, Edison O., Pagilla, Prabhakar R.
    Abstract:

    In this work, we employ a non-dimensional state space representation of the spatially dependent lateral transfer functions to study web lateral position behavior in response to lateral displacement and rotation of the Guide Roller as inputs. In particular, we will show that controlling the web lateral position and slope requires independently controlling the rotation and translation of the Guide Roller. We will discuss how the spatially dependent lateral transfer functions and measurements from several edge sensors may be utilized to obtain an estimate of the web slope. We will also discuss control strategies for controlling both web lateral position and slope and attenuation of lateral disturbances. We will provide results from numerical simulations of representative guiding situations to support the developments and discussions. This study is particularly relevant for high-precision lateral regulation within the span that may be required for emerging R2R applications in flexible and hybrid electronics such as nanoimprinting, printing, and deposition processes

  • Spatially dependent transfer functions for web lateral dynamics
    Oklahoma State University, 2017
    Co-Authors: Cobos Torres E. O., Pagilla, Prabhakar R.
    Abstract:

    In this paper we derive spatially dependent transfer functions for web span lateral dynamics which provide web lateral position and slope as outputs at any location in the span; the inputs are Guide Roller displacement, web lateral position disturbances from upstream spans, and disturbances due to misaligned Rollers. This is in sharp contrast to the existing approach where only web lateral position response is available on the Rollers. We describe the inherent drawbacks of the existing approach and how the new approach overcomes them. The new approach relies on taking the 1D Laplace transform with respect to the temporal variable of both the web governing equation and the boundary conditions. One can also obtain the web slope at any location within the web span with the proposed approach. A general span lateral transfer function, which is an explicit function of the spatial position along the span, is obtained first followed by its application to different intermediate Guide configurations