Metal deforming – With indication of condition or position of work – product,... – Including deformation by simple bending
Reexamination Certificate
2006-03-17
2009-10-27
Jones, David B (Department: 3725)
Metal deforming
With indication of condition or position of work, product,...
Including deformation by simple bending
C072S389300, C072S389400, C072S702000, C100S050000, C100S257000, C700S165000, C700S206000, 36, 36
Reexamination Certificate
active
07607329
ABSTRACT:
With a method according to the invention for free bending, a workpiece to be machined, such as a sheet metal plate, is brought into contact with a bending edge of a lower die. A bending punching tool is moved opposite to the lower die, such that the sheet metal plate is bent by the punching tool in terms of generating a predetermined target bending angle across the bending edge. In this case, the achieved bending angle is measured at least after a first bending process and the bending force to be applied and the measuring curve resulting therefrom are determined during the bending process as a function of the traverse path of the bending punching tool. A correction value for the course of the bending process is subsequently determined from the resulting deviation between the predetermined target bending angle and the achieved bending angle and as a result of the detected measurement curve and a model-based calculation of the bending behavior and further bending processes are carried out in view of the correction values.
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Heller Burkhard
Kaever Michael
Ridane Nader
Jones David B
Siemens Aktiengesellschaft
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