Method of accurately fixturing stamped work parts after trim and bend process
First Claim
1. A method of fixturing and determining springback in a deformed part after the part has been trimmed comprising the steps of:
- trimming the part in a press using at least one trim die;
raising and supporting the trimmed part on at least three removable fixture posts, at least one fixture post having a top surface shaped to match the underside of the deformed and trimmed part and at least one fixture post having a semi-spherical top surface, whereby one portion of the part is secured in at least one directionsecuring the at least three fixture posts within apertures in the trim die; and
measuring the position of the trimmed part to determine deflection caused by springback.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and device is provided for measuring springback of a vehicle panel within a deformation press. This avoids the need for removing the panel from the press and fabricating a dedicated measuring fixture. A trim die in the deformation press is retrofit to perform an additional function, namely securing a deformed panel in a position such that a measurement of the panel can be made. The trim die is retrofit by modifying existing apertures and adding additional aperture(s) in required positions. In the process, after bending the panel into the press and, using the trim die, undesired material is trimmed from the deformed panel. The panel is raised and at least three fixture posts are placed in apertures in the trim die. The panel rests on the posts with one post securing the panel in either one, two or three directions. The panel is then scanned or otherwise measured to determine springback in the panel.
21 Citations
17 Claims
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1. A method of fixturing and determining springback in a deformed part after the part has been trimmed comprising the steps of:
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trimming the part in a press using at least one trim die; raising and supporting the trimmed part on at least three removable fixture posts, at least one fixture post having a top surface shaped to match the underside of the deformed and trimmed part and at least one fixture post having a semi-spherical top surface, whereby one portion of the part is secured in at least one direction securing the at least three fixture posts within apertures in the trim die; and measuring the position of the trimmed part to determine deflection caused by springback. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for trimming a deformed part and measuring the degree of springback in the deformed part comprising:
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a trim die including at least three apertures therein for supporting fixture posts; at least 3 removable fixture posts to support the deformed and trimmed part, at least one fixture post having a top surface contoured to match the underside of the deformed part and at least one fixture post having a semi-spherical top surface; and a measuring device for measuring the deformed and trimmed part while it is supported on the fixture posts. - View Dependent Claims (14, 15, 16)
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17. A method of fixturing and determining springback in a trimmed part comprising the steps of:
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trimming the part in a press using at least one trim die having at least a first and second aperture that support buttons used to form apertures in the part; raising and supporting the trimmed part on at least three fixture posts, at least two of the posts are secured within the first and second aperture respectively after removal of the buttons and whereby one portion of the part is secured in at least one direction;
wherein at least one fixture post has a top surface shaped to match the underside of the deformed and trimmed part; and
at least one fixture post has a semi-spherical top surface andmeasuring the position of the trimmed part to determine deflection caused by springback.
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Specification