Properties of Large-Scale Structure Workpieces in High-Pressure Sheet Metal Forming of Tailor Rolled Blanks

2005 ◽  
Vol 76 (12) ◽  
pp. 890-896 ◽  
Author(s):  
Rainer Krux ◽  
Werner Homberg ◽  
Matthias Kleiner
Keyword(s):  
High Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Tailor Rolled Blanks

Research Status of High-Pressure Water Jet Incremental Sheet Metal Forming and Research on a New Method of the Straight-Walled Sheet Metal Part Forming

2012 ◽  
Vol 217-219 ◽  
pp. 2093-2096
Author(s):  
Ling Yun Zhang ◽  
Peng Yuan
Keyword(s):  
High Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Water Jet ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Incremental Sheet Metal Forming ◽  
Pressure Water ◽  
High Pressure Water Jet

The basic theory, process characteristics and advantages of high-pressure water jet incremental sheet metal forming were introduced. International research progresses in this field were summarized. The difficulty of straight-walled sheet metal part forming was analyzed, and a new method was researched, the result shows that the solution by regulating the contact angle which between sheet metal and water jet is practicable. The future developments were prospected.

scholarly journals Advanced Friction Modeling in Sheet Metal Forming

2011 ◽  
Vol 473 ◽  
pp. 715-722 ◽  
Author(s):  
J. Hol ◽  
M.V. Cid Alfaro ◽  
T. Meinders ◽  
J. Huétink
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Coefficient Of Friction ◽  
Surface Texture ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Large Scale ◽  
Friction Model ◽  
Micro Scale ◽  
Forming Simulations

The Coulomb friction model is frequently used for sheet metal forming simulations. This model incorporates a constant coefficient of friction and does not take the influence of important parameters such as contact pressure or deformation of the sheet material into account. This article presents a more advanced friction model for large-scale forming simulations based on the surface changes on the micro-scale. When two surfaces are in contact, the surface texture of a material changes due to the combination of normal loading and stretching. Consequently, shear stresses between contacting surfaces, caused by the adhesion and ploughing effect between contacting asperities, will change when the surface texture changes. A friction model has been developed which accounts for these microscopic dependencies and its influence on the friction behavior on the macro-scale. The friction model has been validated by means of finite element simulations on the micro-scale and has been implemented in a finite element code to run large scale sheet metal forming simulations. Results showed a realistic distribution of the coefficient of friction depending on the local process conditions.

Analysis of Residual Stresses in High-Pressure Sheet Metal Forming

CIRP Annals ◽  
2004 ◽  
Vol 53 (1) ◽  
pp. 211-214 ◽  
Author(s):  
M. Kleiner ◽  
R. Krux ◽  
W. Homberg
Keyword(s):  
High Pressure ◽  
Residual Stresses ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming

Material Flow Control in High Pressure Sheet Metal Forming of Large Area Parts with Complex Geometry Details

2005 ◽  
Vol 76 (12) ◽  
pp. 905-910 ◽  
Author(s):  
Michael Trompeter ◽  
Erkan Önder ◽  
Werner Homberg ◽  
Erman Tekkaya ◽  
Matthias Kleiner
Keyword(s):  
High Pressure ◽  
Flow Control ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Material Flow ◽  
Complex Geometry ◽  
Large Area ◽  
Material Flow Control

Large-Scale Laminated Dies for Sheet Metal Forming

2002 ◽  
Author(s):  
Daniel Walczyk
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Large Scale ◽  
Thick Layer ◽  
Steel Part ◽  
Cnc Machining ◽  
Front End ◽  
Time Required ◽  
Awj Cutting

As part of a 5-year NSF-sponsored project, a design and fabrication system is being developed for Profiled Edge Laminated (PEL) tooling. The PEL tooling method is a thick-layer Rapid Tooling (RT) approach that offers distinct advantages over both conventional CNC machining of billets and other RT processes. Furthermore, the method is ideally suited for developing large-scale sheet metal forming tools. To date, the following design, fabrication and analysis tools have been completed: details of the ‘front-end’ design and analysis process; valid structural and thermal FEL modeling methods for PEL tooling; and development of the ‘back-end’ PEL tool fabrication process consisting of a CAM software system to allow AWJ cutting of individual PELs based on a CAD model. The front end process has been demonstrated with matched die forming of a 2-dimensional steel part. The back-end process has also been demonstrated using a 3-dimensional hydroformed aluminum part. Future work will include incorporation of variable thickness and orientation algorithms that account for stock lamination thicknesses and part dimensional tolerances, more advanced structural and thermal models, the means to predict the cost and time required for fabrication of PEL tools, an investigation of different lamination bonding methods, and additional industrial case studies.

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