Metal deforming – By tool-couple pressing together adjacent surface portions... – To form longitudinally-seamed tube
Reexamination Certificate
2005-08-20
2011-10-25
Tolan, Edward (Department: 3725)
Metal deforming
By tool-couple pressing together adjacent surface portions...
To form longitudinally-seamed tube
C072S048000, C072S368000, C072S370010, C228S017500
Reexamination Certificate
active
08042368
ABSTRACT:
To produce hollow profiles from sheet-metal blanks, the invention uses at least two process steps to form said blanks into a slit profile which is subsequently welded to produce the finished welded profile. For this purpose a mandrel is used which cooperates with a first tool part in the first step, and with a second tool part in the second step, such as to form a gap with the recess of each tool part into which a portion of the sheet-metal blank is guided. Shaping the sheet-metal blank in at least two steps means that a mandrel that is a self-contained component and can therefore be moved by a simple control device can be used to support the sheet-metal blank while the slit profile is being created. This considerably reduces the equipment needed to produce the hollow profile. Moreover, forming the sheet-metal blank into the slit profile in at least two steps also considerably improves the reliability with which this shaping takes place.
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Brüggenbrock Michael
Flehmig Thomas
Rituper Wladimir
Tohfa Mohamed
Proskauer Rose LLP
ThyssenKrupp Steel AG
Tolan Edward
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