The Experts below are selected from a list of 156 Experts worldwide ranked by ideXlab platform

Jinlong Jou - One of the best experts on this subject based on the ideXlab platform.

  • application of numerical simulation for wear analysis of warm Forging Die
    Journal of Materials Processing Technology, 2003
    Co-Authors: Rongshea Lee, Jinlong Jou
    Abstract:

    Abstract Warm Forging process has better forming precision than hot Forging process and has better formability than cold Forging. But warm Forging Die sustains higher temperature and working pressure, the Die wear is faster than those of hot Forging and cold Forging. The purpose of this research is to combine the experimental techniques, wear model and numerical simulation method to predict the wear of warm Forging Die. The non-isothermal ring compression test was adopted to estimate the friction coefficient in different temperatures and the on-line temperature recording system was setup to correct the heat transfer coefficient of the interface. The wear coefficients in different temperatures were acquired from high temperature wear experiment. Finally, the Archard wear theory and DEFORM, a FEM code, were used to analyze the warm Forging of automotive transmission outer-race and predict the Die wear condition.

Mustafa Ilhan Gokler - One of the best experts on this subject based on the ideXlab platform.

  • wear analysis of hot Forging Dies
    Tribology International, 2010
    Co-Authors: Siamak Abachi, Metin Akkok, Mustafa Ilhan Gokler
    Abstract:

    In hot Forging, Die wear is the main cause of failure. In this paper, the wear analysis of a closed hot Forging Die used at the final stage of a component has been realized. The simulation of Forging process was carried out by commercially available software based on finite volume method and the depth of wear was evaluated with a constant wear coefficient. By comparing the numerical results with the measurement taken from the worn Die, the wear coefficient has been evaluated for different points of the Die surface and finally a value of wear coefficient is suggested.

Rongshea Lee - One of the best experts on this subject based on the ideXlab platform.

  • application of numerical simulation for wear analysis of warm Forging Die
    Journal of Materials Processing Technology, 2003
    Co-Authors: Rongshea Lee, Jinlong Jou
    Abstract:

    Abstract Warm Forging process has better forming precision than hot Forging process and has better formability than cold Forging. But warm Forging Die sustains higher temperature and working pressure, the Die wear is faster than those of hot Forging and cold Forging. The purpose of this research is to combine the experimental techniques, wear model and numerical simulation method to predict the wear of warm Forging Die. The non-isothermal ring compression test was adopted to estimate the friction coefficient in different temperatures and the on-line temperature recording system was setup to correct the heat transfer coefficient of the interface. The wear coefficients in different temperatures were acquired from high temperature wear experiment. Finally, the Archard wear theory and DEFORM, a FEM code, were used to analyze the warm Forging of automotive transmission outer-race and predict the Die wear condition.

Laurence Hervy - One of the best experts on this subject based on the ideXlab platform.

  • influence of design and process parameters on service life of nut hot Forging Die
    Journal of Materials Processing Technology, 2004
    Co-Authors: Veronique Gara, Gerard Ernha, Laurence Hervy
    Abstract:

    Abstract A nut hot Forging Die was investigated in order to increase its life time. In a first step Forging process simulation shows that Die surface temperature reaches 450 °C and that mechanical loads on the Die are closely related to the accuracy of the initial billet length. In a second step Die thermo-mechanical simulation was used to optimize the design: geometrical aspect as well as shrink fitting were investigated. Life time increase was estimated in using the Manson universal slope relation. This increase was confirmed from the practical results.

Yusong Wang - One of the best experts on this subject based on the ideXlab platform.

  • experimental and theoretical analysis of wear mechanism in hot Forging Die and optimal design of Die geometry
    Wear, 2014
    Co-Authors: Wujiao Xu, Wuhua Li, Yusong Wang
    Abstract:

    Abstract The purpose of this study is to gain a better understanding of the wear mechanism in hot-Forging Die, propose a new wear calculation model to predict the Die wear more accurately and present a Die geometry optimization method to prolong the Die lifespan. Taking the mandrel in wheel hub Forging process as example, the wear mechanism was stuDied by SEM examinations. It was found that three competing wear mechanisms exist on the worn surface, namely adhesive wear, abrasive wear and oxidation wear. A new wear calculation model was proposed with the consideration of these three wear mechanisms. An optimal design of the mandrel geometry was carried out based on the proposed wear calculation model, Forging numerical simulation, BP neural network and Sequential Quadratic Programming (SQP) algorithm. Wear tests were performed to verify the wear calculation accuracy, which shows a good agreement with the calculated result. This study will be beneficial to the accurate prediction of Die wear and the optimal design of Die geometry in hot-Forging process.