Method for joining at least two plate-shaped workpieces

Details Method for joining at least two plate-shaped workpieces Method for joining at least two plate-shaped workpieces

2008-05-13

2008-05-13

Cozart, Jermie (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S505000, C029S509000, C029S525050, C029S525060, C029S243500, C029S243530, C403S282000

Reexamination Certificate

active

11678906

ABSTRACT:
In a method for joining at least two plate-shaped workpieces by a fastening tool and a device for operating the fastening tool, the fastening tool comprises a punch for exerting a punch force to perform a joining operation and a clamp for exerting a clamping force upon the workpieces at the joining area. During the joining operation the punch exerts a high punch force to perform the joining operation and the clamp exerts substantially no clamping force to allow for free material deformation in the joining area. After the joining operation both the punch and the clamp exert high forces at the same time to reduce any material deformations of the workpieces and to provide for compression of the workpieces in the joining area. Preferably the invention is used in a riveting tool for setting self-piercing rivets; as an alternative it may be used in a clinching tool.

REFERENCES:
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patent: 6398096 (2002-06-01), Lang
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patent: 10 130 723 (2003-01-01), None
patent: 10 130 726 (2003-01-01), None

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