Invention Grant
- Patent Title: Apparatus and method of compensating for springback in a workpiece
- Patent Title (中): 补偿工件回弹的装置和方法
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Application No.: US54893Application Date: 1987-05-28
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Publication No.: US4802357APublication Date: 1989-02-07
- Inventor: Everett E. Jones
- Applicant: Everett E. Jones
- Applicant Address: WA Seattle
- Assignee: The Boeing Company
- Current Assignee: The Boeing Company
- Current Assignee Address: WA Seattle
- Main IPC: B21D5/02
- IPC: B21D5/02
Abstract:
An apparatus and a method for bending a workpiece to a predetermined angle in a brake press and automatically compensating for springback of the workpiece which has a sensing device, biased relative the workpiece, for detecting a neutral position of the workpiece corresponding to the cessation of springback motion and generating a signal in response thereto, and a device, responsive to the signal, for measuring the linear distance of springback, and for calculating an amount of overbend required to compensate for springback based on said measured linear distance of springback and the physical geometry of the workpiece. Preferably, the sensing devcie having a linear variable differential transformer having a core rod biased toward the workpiece and in opposition to the punch member of the brakepress.
Public/Granted literature
- US5949139A Semiconductor integrated circuit device capable of achieving reductions in chip area and consumption power Public/Granted day:1999-09-07
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