Numerical simulation on multi-gripper stretch forming process for sheet metal

Wang, Y.; Li, M. Z.; Peng, H. L.; Gu, S. H.
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p863
Academic Journal
Multi-gripper stretch forming (MGSF) is a new flexible forming process compared to traditional stretching forming process. Two kinds of MGSF process, back-vertical drawing (BVD) and front-vertical drawing (FVD) are compared in this study. Spherical-curved part is selected as the research object, and the finite numerical modes for BVD and FVD have been established, and the simulation results are carried out by dynamic explicit finite element analysis. The numerical results indicated that the sheet metal can get the shape of the die at a lower strain ratio and the stretch strain distribution was more uniform by the FVD, which can improve the forming quality of the formed parts. In addition, the sheet metal can be formed by FVD under smaller hydraulic cylinder strokes. The results may provide useful guidance on optimizing the MGSF equipment structure.


Related Articles

  • Numerical-experimental comparison study regarding single point incremental forming process. Oleksik, Valentin; Pascu, Adrian; Roca, Liviu; Bondrea, Ioan // AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p532 

    The paper presents a comparison study based on the numerical simulation with the finite element method (using the Ls-Dyna software) of incremental sheet metal forming and experimental researches regarding the same process. For this comparison study we selected four different shell formulations:...

  • Hemming Process Simulation of Table-top Hemming Machine. Juguang Lin; Erwei Wang; Guangrui Zhou // Applied Mechanics & Materials;2014, Issue 644-650, p2177 

    Influence of different pre-hem paths on the flange geometry was studied first. According to the results of simulation the vertical pre-hem path was applied. Effects of the process parameters including pre-hem angle, flange length and friction coefficient on Roll-in/out were also investigated in...

  • Direct Evaluation of Coulomb Friction Coefficient from Sheet Strip Stretch Test on a Cylinder Surface. Karadoǧan, Celalettin; Hatipoǧlu, Hasan Ali // Advanced Materials Research;2014, Vol. 966-967, p242 

    Knowing the flow curve of a sheet metal, strain distribution on a sheet strip may be used to roughly but quickly evaluate the Coulomb friction coefficient. Strain distribution on the strip being stretched on a cylindrical surface of interest may be measured by an optical strain measurement...

  • Numerical investigation of flexible clamp stretch forming. Peng, Heli; Li, Mingzhe; Fu, Wenzhi; Wang, You // AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p361 

    Multi-clamp stretch forming technology has been used in sheet metal for years, however, the arrangement of clamps change with the shape of stretching die is rather new. The goal of this research is to optimize the processing parameters of flexible clamp stretch forming machine. First, the...

  • The Numerical Analysis of Accuracy of Hydraulic Leg Cylinder in Modeling Using Solid Works Simulation. Buyalich, G. D.; Anuchin, A. V.; Dronov, A. A. // Applied Mechanics & Materials;2015, Vol. 770, p456 

    The research work on the influence of an angle α at centre and the finite element sizes in modeling a hydraulic leg cylinder has been done to determine the stress-strain state by FEM using SolidWorks Simulation software. Based on the analysis results the reasonable values of the central angle...

  • Surface Defects in Sheet Metal Forming: a Simulative Laboratory Device and Comparison with FE Analysis. Thuillier, Sandrine; Le Port, Alban; Manach, Pierre-Yves // AIP Conference Proceedings;8/22/2011, Vol. 1383 Issue 1, p839 

    Surface defects are small concave imperfections that can develop during forming on outer convex panels of automotive parts like doors. They occur during springback steps, after drawing in the vicinity of bending over a curved line and flanging/hemming in the vicinity of the upper corner of a...

  • NUMERICAL VERIFICATION OF A NEW TEST SETUP FOR MEASUREMENT OF FRICTION COEFFICIENTS IN SHEET METAL FORMING APPLICATIONS. Karadoğan, Celalettin; Alkaş, Celal Onur; Hatipoğlu, Hasan Ali // Engineering Science & Technology, an International Journal;2012, Vol. 15 Issue 1, p27 

    Due to its involved physical and difficult to model phenomena, friction is preferably characterized under environmental conditions specific to the process being analyzed. For the analysis of deep drawing and stretch forming of sheet metals, there are approaches to measure friction coefficients...

  • DETERMINATION OF FLOW STRESS BY THE HYDRAULIC BULGE TEST. Slota, J.; Spišák, E. // Metalurgija;2008, Vol. 47 Issue 1, p13 

    In sheet metal forming operations the mechanical properties of the sheet metal (stress-strain curve, flow stress) greatly influence metal flow and product quality. Accurate determination of the stress-strain relationship is important in process simulation by finite element method. In this paper...

  • Investigation on Flatness of Shim Rings in Blanking. Hirota, K.; Hisaoka, H. // Key Engineering Materials;2014, Vol. 622-623, p1087 

    Flatness of blanked parts is important as well as the cut edge quality and often becomes worse when blanking the low stiffness parts such as narrow shim rings. In this study, the affecting factors on the flatness of shim rings in conventional blanking were investigated through the experiments...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics