Invention Grant
- Patent Title: Real-time draw-in sensors and methods of fabrication
- Patent Title (中): 实时绘图传感器和制作方法
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Application No.: US10140916Application Date: 2002-05-07
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Publication No.: US06769280B2Publication Date: 2004-08-03
- Inventor: Jian Cao , Junghoon Lee , Michael Peshkin
- Applicant: Jian Cao , Junghoon Lee , Michael Peshkin
- Main IPC: B21D2222
- IPC: B21D2222

Abstract:
A method and system for providing real time measurements of draw-in for closed loop control of a metal forming process including an elongated sensor on one of the tools positioned in the proximity of the deformation zone and adjacent to an edge of a sheet metal blank being formed. The sensor includes coils disposed in a signal coupling relationship and during the forming process, a signal applied to one of the coils induces a signal in the coil, producing a response signal that varies linearly as a function of the amount of overlap between the sensor and the sheet metal blank as the sheet metal blank is drawn into the deformation zone. A feedback signal produced from the response signal is used to control a parameter of the forming process as a function of retreat of the edge of the sheet metal blank into the deformation zone.
Public/Granted literature
- US20020186007A1 Real-time draw-in sensors and methods of fabrication Public/Granted day:2002-12-12
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