Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2005-09-20
2005-09-20
Rodriguez, Paul L (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S098000, C700S118000
Reexamination Certificate
active
06947809
ABSTRACT:
A method of developing a stamping die for a workpiece is provided, which includes the steps of stamping a workpiece in a current die. A measurement is made of the stamped workpiece to determine its profile. The profile is compared with the design intent workpiece to determine dimensional variance. If the variance is within predetermined limits, the development is complete. If the variance is beyond limits, a conceptual determination is made of the residual forces in the current die stamped workpiece when the current die stamped workpiece is restamped by a design intent die. This conceptual determination is carried out on a computer. From the determination of residual forces, a new current die is developed. The new current die then stamps the workpiece. The steps are repeated until the stamped workpiece profile is within predetermined limits.
REFERENCES:
patent: 4373371 (1983-02-01), Liu
patent: 4802357 (1989-02-01), Jones
patent: 4989439 (1991-02-01), Ewert et al.
patent: 6013997 (2000-01-01), Heideman et al.
Longwu Wu “Tooling Mesh Generation Technique for Interative FEM Die Surface Design Algorithm to Compensate for Springback in Sheetmetal Stamping”, Engineering Computations, vol. 14, No. 6, 1997,pp. 630-648; MCB University Press.
A.P. Karafillils and M.C. Boyce: Tooling Design in Sheet Metal Forming Using Springback Calculations; Int. J. Mech. Sci, vol. 34, No. 2, pp. 113-131, 1992; Pergamon Press, pic.
Apostolos P. Karafillis and Mary C. Boyce; Tooling and Binder Design for Sheet Metal Forming Processes Compensating Springback Error; Int. J. Mach. Tools Manufact., vol. 36, No. 4, pp. 503-526, 1996, Pergamon.
Longwu Wu; Tooling Mesh Generation Technique for Interative FEM Die Surface Design Algorithm to Compensate for Springback in Sheetmetal Stamping; Engineering Computations, vol. 14, No. 6, 1997, pp. 630-648; MCB University Press.
Ren Feng
Xia Zhiyong Cedric
Dykema Gossett
Ford Global Technologies
Kelley David B.
Rodriguez Carlos Ortiz
Rodriguez Paul L
LandOfFree
Method of modifying stamping tools for spring back... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of modifying stamping tools for spring back..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of modifying stamping tools for spring back... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3367731