Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2005-07-19
2005-07-19
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S521000, C403S282000
Reexamination Certificate
active
06918170
ABSTRACT:
The invention relates to a tubular rivet connection between at least one first (1) and one second metal sheet (2). According to the invention, the tubular rivet (3) is made from the metal of the first metal sheet (1) by deforming, in a drawing direction (Z), the edge area of a first hole (4) located in the first metal sheet (1) into a second, larger hole (5) located in the second metal sheet (2), whereby the second hole (5) located in the second metal sheet (2) is, in particular, gradually enlarged with regard to its diameter in the drawing direction (Z). The invention provides that the tubular rivet (3) is shorter in length in the drawing direction (Z) than the thickness of the second metal sheet (2). To this end, the thickness tolerance of commercially available metal sheets is taken into account and damages to the tools and/or the formation of chips is/are prevented. With regard to the method for producing such a tubular rivet connection, the invention provides that the second metal sheet (2) is supported by a matrix, which has a diameter approximately corresponding to the diameter of the hole (5) in the second metal sheet (2).
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Adval Tech Holding AG
Bryant David P.
Tarolli, Sundheim Covell & Tummino L.L.P.
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