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US 6,631,631 B2Granted
Two-roll rounding machine and method for rounding sheet-metal blanks
AssigneeElpatronic AG
InventorsEugen Müller, Jakob Müller
Life of this patent
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Abstract
On a two-roll rounding machine, in addition to a compressively elastic guide roll and a compressively rigid rounding roll, one or more compressively elastic rolls are provided which have both a rounding function and a supporting function for the rounding roll. These additional rolls may also be supported by a back-up roll. The result is a rounding machine that has very good rounding characteristics even at small rounding diameters.
Claims10
An apparatus for rounding sheet-metal blanks, comprising:
- a first compressively elastic roll;
- a second compressively elastic roll;
- a compressively rigid rounding roll;
- and
- a compressively rigid back-up roll;
- wherein the first compressively elastic roll and the second compressively elastic roll each act on the compressively rigid roll to cause sheet-metal blanks to be rounded around the compressively rigid roll, and the compressively rigid back-up roll acts on the second compressively elastic roll.
3 more elements
A method for rounding a sheet-metal blank into a tubular body, comprising the steps of:
- providing an apparatus for rounding sheet-metal blanks that includes a first compressively elastic roll, a second compressively elastic roll, a compressively rigid rounding roll, and a compressively rigid back-up roll;
- selectively actuating one or both of the first compressively elastic roll and the compressively rigid rounding roll into contact with the other of the first compressively elastic roll and the compressively rigid rounding roll;
- selectively actuating one or both of the second compressively elastic roll and the compressively rigid rounding roll into contact with the other of the second compressively elastic roll and the compressively rigid rounding roll;
- selectively actuating one or both of the compressively rigid back-up roll or the second compressively elastic roll into contact with the other of the compressively rigid back-up roll or the second compressively elastic roll;
- and
- passing the sheet-metal blank two or more times between the first compressively elastic roll and the compressively rigid rounding roll, and between the second compressively elastic roll and the compressively rigid rounding roll to form a single wall tubular body.
3 more elements
Dependencies are inferred from the claim text.