The Experts below are selected from a list of 114447 Experts worldwide ranked by ideXlab platform

Wu Ming - One of the best experts on this subject based on the ideXlab platform.

Tang Bing-tao - One of the best experts on this subject based on the ideXlab platform.

  • Knowledge-based sheet metal blanking process and 3D Die Structure design
    Materials Science and Technology, 2004
    Co-Authors: Tang Bing-tao
    Abstract:

    In order to improve the quality and efficiency of sheet medal blanking process and Die design and accomplish the reuse and shake of knowledge, intelligent and parametric design technology is stuDied systematically. The hybrid knowledge representation methods including data base, frame, rule, objected-oriented method and mathematical model are incorporated to represent process design knowledge, geometric model and data base are combined to represent Die Structure design knowledge; project-based dynamic design method is invented to support the intelligent design. Based on the proposed methodologies, combining the macro function and the API, the knowledge-based sheet metal blanking process and 3D Die Structure design support system is developed, and the specific design case proves the powerful functionalities of the developed system.

Ma Xinwu - One of the best experts on this subject based on the ideXlab platform.

  • numerical simulation and Die Structure optimization of an aluminum rectangular hollow pipe extrusion process
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2006
    Co-Authors: Wu Xianghong, Luan Yiguo, Zhao Guoqun, Ma Xinwu
    Abstract:

    Uniform material flow in the cross section of the bearing exit in an aluminum extrusion process is extremely important for getting high quality products. In general, several measures are taken to eliminate non-uniform material flow, such as adjustment of the size, shape and location of portholes and welding chamber, modifications of local bearing lengths, etc. In the present work, an aluminum profile porthole Die extrusion process is simulated using the finite volume method based numerical analysis software Msc/SuperForge. The simulation results show that with the originally designed Die the material flow velocities in the profile cross-section of the bearing exit are non-uniform. Aiming at solving this problem, three Die Structure modification schemes are proposed and their extrusion processes are simulated, respectively. The optimal Die design scheme is determined by comparing the simulation results. For comparison, the same process is simulated with finite element based DEFORM 3D, and the results are similar with those obtained with SuperForge, but the accuracy is lower and much more computation time is needed due to frequent mesh regeneration.

  • Numerical Simulation and Die Structure Optimization of an Aluminum Rectangular Hollow Pipe Extrusion Process
    Machine Tool & Hydraulics, 2006
    Co-Authors: Ma Xinwu
    Abstract:

    An aluminum rectangular hollow profile extrusion process was simulated by using numerical analysis software SuperForge.The uniform material flow velocity in the section of bearing exit is extremely important for getting a high quality product.In general,several Die modification methods were chosen to eliminate uneven velocity distribution in the section of bearing exit,such as adjustment of the size,shape and location of portholes,modification of the bearing length and seaming chamber shape.It is found that the flow velocity of the rectangle hollow profile through an original Die design is non-uniform and the forepart of the profile is not neat or even.Aiming to solving this problem,three Die Structure modification schemes were proposed.The extrusion processes for three Die Structure schemes were simulated,and the optimal Die design was determined through comparing the simulation results of the three Die design schemes.A sound extrusion workpiece was produced by using the optimal Die design.

G.b. Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Prediction on Die Structure Performance During Advanced High-Strength Steel Sheet Metal Stamping With Non-Rigid Tooling Definition
    ASME 2011 International Manufacturing Science and Engineering Conference Volume 1, 2011
    Co-Authors: Jun Chen, Y.c. Tang, G.b. Zhang
    Abstract:

    Die Structure behavior and its stability are playing more important roles in stamping of advanced high-strength steel (AHSS) sheet metals since the Die Structure has to maintain steady forming conditions when larger forming load is generated and applied on the Die components. Before the workshop try-out, the virtual testing tool is necessary to assure the stamping Die design safety. In this paper, a reliable and efficient method to forecast the Die Structure performance using an updated load mapping algorithm was proposed to verify the stamping Die Structure design. Furthermore, an improved method for sheet metal forming modeling with non-rigid tooling definition was also presented to enhance the prediction accuracy. In order to validate the proposed method, a step-shaped-bottom cup drawing Die was developed and a data collection system was also adopted to measure the strain/stress evolution at specified locations and to reveal the phenomenon of tooling deflection during the AHSS sheet metal drawing process. The comparison between experimental results and prediction demonstrated very good correlation, and the revised method is more accurate and efficient and is expected to be used to verify the industrial AHSS stamping Die designs and support the further research on Die Structure optimization.

  • Die Structure analysis of stress distribution during High-Strength Steel stamping process and experimental validation
    International Journal of Materials and Product Technology, 2010
    Co-Authors: G.b. Zhang, Jian Chen, Y.c. Tang, Li-qun Chen, A. Wang, H. Xiao, L. Shi, H.m. Jiang
    Abstract:

    High-Strength Steel (HSS) is being widely used in automotive industry. However, load condition on Die Structure for HSS stamping increases sharply. A method for Die-Structure FEA analysis was proposed in this paper. The interaction force between forming blank and Die faces was mapped onto Die faces to serve as load boundary conditions for Die Structure analysis. A hyperbolic-bottomed-cup-drawing Die was analysed and validated by experiment under several forming conditions. Results show that the predicted Von Mises stress values at specified positions coincides with the experimental ones as well within 15% error.

T Yamazaki - One of the best experts on this subject based on the ideXlab platform.

  • Characteristic Feature of Dynamic Motion for Servo Press Machine by Direct Modeling Analysis
    Applied Mechanics and Materials, 2015
    Co-Authors: T Yamazaki, Akihiro Watanabe
    Abstract:

    Servo press machine can enable us to high precision, but the dynamic behavior does not seem to be considered well. In order to improve the accuracy in manufacturing, it has been discussed effectiveness of reducing the elastic deformation of Die Structure on forming by mechanically compensating Die Structure which includes a servo Die cushion system.

  • Basic study on dynamic characteristics for servo-press machine
    2012 Proceedings of SICE Annual Conference (SICE), 2012
    Co-Authors: Akihiro Watanabe, H Watari, T Yamazaki
    Abstract:

    It is important to examine the effects of elastic deformation of the press and Dies on product accuracy. This paper describes the elastic deformation of the Die Structure in a servo press. Strains of the Die and the servo press were measured during deep drawing relatively thick products. A finite-element simulation was then performed to clarify the elastic deformation of the Die Structure.

  • Effects of Elastic Behaviour of Dies and Servo Press Machine on Deep Drawing Process
    Advanced Materials Research, 2010
    Co-Authors: Akihiro Watanabe, Y Kotani, K Nishimura, H Watari, T Yamazaki
    Abstract:

    Characteristic features of elastic deformation of Dies and presses during deep drawing were measured to examine the effects of elastic deformation of the press and Dies on product accuracy. Strains were measured on the press including Dies, a slide and a bolster of a servo press. A strain magnitude of 63 ×10-6 was obtained when the slide position was at the lowest point. Two slide motions of the servo press were selected to determine appropriate manufacturing conditions. An elastic deformation analysis of the Die Structure was then performed by CAD simulation. To find an appropriate Die Structure model, the vertical displacement of the Die Structure in the CAD simulation was compared to the experiment results. It was found that the vertical displacement of the Die Structure was 0.147 [mm] at the top surface of the Die when considering elastic deformation of the Die Structure as well as the bolster of the servo press.

  • effects of elastic behaviours of Dies and servo press machine on deep drawing process
    2009 ICCAS-SICE, 2009
    Co-Authors: Akihiro Watanabe, Y Kotani, K Nishimura, H Watari, T Yamazaki
    Abstract:

    Various characteristic features of elastic deformation of Dies and presses during deep drawing were presented. It was very important to examine the effects of elastic deformation of these units on product accuracy. Strains were measured on the press system including Dies, a slide and a bolster of a servo press. A strain magnitude of 63 × 10−6 was obtained when the overall slide position was at the lowest point. Two slide motions of the servo press were selected to determine appropriate manufacturing conditions. An elastic deformation analysis of the Die Structure was then required by CAD simulation. To find the appropriate Die Structure model, the vertical displacement of the Die Structure in the CAD simulation only was compared to the experiment results. It was found that the vertical displacement of the Die Structure was 0.176 mm at the top surface of the Die considering elastic deformation of the Die Structure as well as the bolster of the servo press.