Method for bending metal sheet and device for regulating residual stress
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United States of America Patent
Stats
-
Apr 4, 2017
Issued Date -
N/A
app pub date -
Jan 13, 2012
filing date -
Jan 14, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A device for regulating a residual stress is comprised of: input means; a residual stress database; a process condition database; first searching means for searching a residual stress (σ0) from the residual stress database; a calculator for calculating a first bending moment (Mrs) in a ridge line originated from the residual stress, and a second bending moment (Mz) in the ridge line originated from bending to obtain a total bending moment (Mrs−Mz) and calculating a camber curvature (ρz) of the workpiece originated from the total bending moment (Mrs−Mz); comparing a difference (|ρz−ρz0|) between the camber curvature (ρz) and a target value (ρz0) with a tolerable value (ρ); second searching means for searching a process condition satisfying a tolerable condition (|ρz−ρz0|≦ρ) from the process condition database when (|ρz−ρz0|>ρ); and regulating means for regulating a residual stress.
First Claim
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International Classification(s)
- 2012 Application Filing Year
- B21D Class
- 892 Applications Filed
- 599 Patents Issued To-Date
- 67.16 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B21D Class
- 0 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 4, 2028 |
