The Experts below are selected from a list of 1587 Experts worldwide ranked by ideXlab platform

Debin Shan - One of the best experts on this subject based on the ideXlab platform.

  • isothermal Precision Forging of complex shape rotating disk of aluminum alloy based on processing map and digitized technology
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013
    Co-Authors: Yanqiu Zhang, Shuyong Jiang, Yanan Zhao, Debin Shan
    Abstract:

    Abstract Isothermal Precision Forging of complex-shape aluminum alloy rotating disk of airplane was systematically investigated by means of digitized technology based on computer-aided design (CAD), computer-aided engineering (CAE) and computer-aided manufacturing (CAM). The constitutive equation of 7A09 aluminum alloy under hot compression was established in order to understand the flow behavior of the metal material during isothermal Precision Forging. 7A09 aluminum alloy frequently exhibits dynamic recovery in the case of low strain rate, while it can also be characterized by dynamic recrystallization in the case of high strain rate. According to dynamic material model, the hot processing map of 7A09 aluminum alloy was obtained to optimize the process parameters which lead to the stable flow of the metal material during isothermal Precision Forging. Based on the different preforms, finite element method (FEM) was used to simulate the metal flow and predict the forming defects during isothermal Precision Forging of rotating disk. By controlling the metal flow, the high-quality rotating disk Forging was manufactured on the basis of the proper preform through digitized technology. The simulated results are in good accordance with the experimental ones.

  • flow lines control of disk structure with complex shape in isothermal Precision Forging
    Journal of Materials Processing Technology, 2009
    Co-Authors: Yanqiu Zhang, Debin Shan
    Abstract:

    Isothermal Precision Forging is applied to manufacturing 7075 aluminum alloy disk workpiece with complex shape. By combining experiment with FEM (finite element method), the mechanism as well as the evolution with respect to the defects of the flow lines is studied in the isothermal Precision Forging of the workpiece. The results show that the flow lines of disk Forging with complex shape are influenced mainly by the flow lines of the die Forging billet. The radial flow lines distribute along the Forging shape more easily than that the axial flow lines do. The fibre breaking is mainly caused by too much redundant metal flowing fast along the radial direction in the late stage of die pressing. In the end, some reasonable measures are put forward to optimize the flow lines.

  • Research On Isothermal Precision Forging Processes Of A Magnesium‐Alloy Upper Housing
    AIP Conference Proceedings, 2004
    Co-Authors: Debin Shan, Nanhai Hao
    Abstract:

    This paper describes isothermal Precision Forging processes of a magnesium‐alloy upper housing. A model test using pure lead and FEM simulation were carried out to study the forming processes. Several technological methods were employed to reduce the Forging pressure or to improve the die fill in the experiment. Isothermal Precision Forging, combined die structure and local loading method were used to form the upper housing. In order to improve the quality of product, preforming, final Forging and coining steps were adopted. The experimental results show that isothermal Precision Forging is a reliable method to produce the upper housing.

  • Study on isothermal Precision Forging technology for a cylindrical aluminium-alloy housing
    Journal of Materials Processing Technology, 1997
    Co-Authors: Debin Shan, Zhong-jin Wang, K.m Xue
    Abstract:

    High-Precision Forging is becoming increasingly popular in modern plastic working. The effects of Forging force, die chilling, residual stress and lubricant are significant in a hot Precision forge. Producing aluminium-alloy Precision Forgings of reasonable complexity is a difficult operation. Temperature control within narrow ranges, high-accuracy dies and suitable forming methods are necessary in order to develop desirable microstructures, properties and the near-net shape of Forgings. Therefore, isothermal Forging is a prime method from the Precision forming viewpoint. This paper presents details of isothermal Precision Forging technology for a cylindrical aluminium-alloy housing.

Chen Shuwa - One of the best experts on this subject based on the ideXlab platform.

Zheng Jianshe - One of the best experts on this subject based on the ideXlab platform.

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

  • Process Design for Cold Precision Forging of Bevel Gear
    2010 International Conference on Digital Manufacturing & Automation, 2010
    Co-Authors: Zhang Qingping, Cui Huanyong, Wang Yuzeng
    Abstract:

    Precision Forging is defined as a near net-shape Forging operation which generates high quality parts concerning surface quality and dimensional accuracy. In particular gears offer a wide application field for the Precision Forging technology. Advantages like shortened production cycles achieved by eliminating machining operations and the saving of raw material contribute to the ongoing cost-saving trend in the industry. This article describes the adopted methods and the Precision Forging process of the bevel gear. 3D FEM model of the Precision Forging process of bevel gear was established. The forming laws, material plastic behavior, changed geometries and the qualities of the gears are explored by finite element simulation. Completely filled gear teeth were obtained using a lower Forging load by the designed process which is the effective Forging process for manufacturing of bevel gear. The design process for bevel gear has to be purpose-built to consider the distinctions of this Precision Forging technique.

  • The Study of Precision Forging Process of Spur Gears
    China Metal Forming Equipment & Manufacturing Technology, 2006
    Co-Authors: Wang Yuzeng
    Abstract:

    The research status and development trends of the Precision Forging process of spur gears have been summarized according to the Precision Forging process,research methods and numerical simulation technology.

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

  • 3D Coupled Thermo-Mechanical FEM Simulation in Precision Forging Process of Blade with Tenon
    Mechanical Science and Technology, 2005
    Co-Authors: Cai Wang
    Abstract:

    A blade is one of the most important mechanical components in an aero-engine. Precision Forging of blades is a tendency for development of blade-Forging technology. However, Precision Forging process of blades involves high temperature and large deformation. There is heat transfer on billet-die interface, and plastic work and frictional work is turned to heat; all these factors make the temperature field of billet continually change. The change of temperature field will affect the deformation behavior of a billet, and the mechanical capability and microstructure of a blade. Therefore, the Forging process of blade with a tenon is simulated and analyzed using a 3D-CTM(3-Dimensional Coupled Thermo-Mechanical Forming Simulation) in order to obtain forming laws in the Precision Forging process of blade. This study is important to optimization of Precision Forging technology and the development of its Precision Forging.

  • Forming laws in Precision Forging process of blade with tenon by 3D coupled thermo-mechanical FEM simulation
    Heavy Machinery, 2005
    Co-Authors: Cai Wang
    Abstract:

    Blade is one of the most important mechanical components in an aero-engine. In this paper, considered different deforming velocity, friction factor and Forging temperature of billet on Precision Forging process, the Forging process of blade with a tenon is simulated and analyzed using a 3D-CTM (3-Dimensional Coupled Thermo-Mechanical Forming Simulation) developed in order to obtain forming laws in the Precision Forging process of blade. This study is important to optimization of Precision Forging technology and the development of Precision Forging.