Process of producing profiles whose cross-section is variable in the longitudinal direction
AssigneeMuhr und Bender KG
InventorsAndreas Hauger, Reiner Kopp, Christoph Wiedner
Life of this patent
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Abstract
A process of producing profiles whose cross-section is variable in the longitudinal direction, characterized by the process stages of cutting a blank 31 with a substantially constant width along a longitudinal direction, deforming the blank 31 by deep-drawing to form an open profile whose cross-section is variable along the longitudinal direction, and cutting the flanges projecting from the open profile.
Claims10
A profile produced from one single blank by cutting and bending operations and having a cross-section which is closed and variable along the length, wherein:
- the blank has a wall thickness that is variable in the longitudinal direction,
- the profile comprises a first cylindrical portion defining a first cylinder axis and having a first diameter that is substantially constant along the first cylindrical portion, a second cylindrical portion defining a second cylinder axis and having a second diameter that is substantially constant along the second cylindrical portion and smaller than the first diameter, and a transition portion arranged between the first and second cylindrical portion and having a diameter that varies from the first diameter to the second diameter, wherein:
- the first cylinder axis and the second cylinder axis extend parallel relative to one another,
- each of the first cylindrical portion, the transition portion, and the second cylindrical portion has an outer surface;
- and
- the profile comprises a straight welded seam line that extends entirely linearly along the outer surfaces of the first cylindrical portion, the transition portion, and the second cylindrical portion, wherein the straight welded seam line extends parallel to the first and second cylinder axes.
A tube formed from a single blank of material including:
- a first cylindrical portion that defines a first cylinder axis and has a first diameter that is substantially constant along the first cylindrical portion;
- a transition portion that extends from the first cylindrical portion;
- and
- a second cylindrical portion that extends from the transition portion and defines a second cylinder axis and has a second diameter that is substantially constant along the second cylindrical portion and that is smaller than the first diameter, wherein:
- the tube has a closed cross-sectional shape throughout the first cylindrical portion, the transition portion, and the second cylindrical portion;
- the first and second cylinder axes extend parallel to one another, and
- a straight welded seam line extends entirely linearly along the first cylindrical portion, the transition portion, and the second cylindrical portion and parallel to the first and second cylinder axes.
Dependencies are inferred from the claim text.