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US 7,406,853 B2Granted
Rolling machine and method thereof
AssigneeLangenstein & Schemann GmbH
InventorsGuenter Hofmann, Stelios Katsibardis, Sigfried Hausdoerfer, Henry Zwilling, Guenther Vogler, Herbert Rueger
Life of this patent
Estimating the term…
Abstract
In the transverse wedge rolling machine as claimed in the invention the drive motor is a permanent magnet motor, especially a torque motor. Furthermore the rotational speed of the rollers is controlled depending on their rotary position.
Claims20
A rolling machine, comprising:
- a) at least two rotatable or rotating rollers which are equipped or which can be equipped with tools for forming a workpiece which is located or which can be located between the rollers;
- and
- b) at least one drive for driving of the rollers;
- wherein the at least one drive comprises at least one permanent magnet motor having a rated torque of about 5,000 Nm-about 80,000 Nm, and accelerating or decelerating to a rated rpm for operation of the roller(s) within a maximum rotary angle interval of at most about 3°.
1 more element
A method for forming a workpiece with a rolling machine, comprising:
- a) at least two rotatable or rotating rollers which are equipped or which can be equipped with tools for forming a workpiece which is located or which can be located between the rollers;
- and
- b) at least one drive for driving of the rollers;
- c) wherein the drive is rpm-controllable and reversible;
- and
- d) wherein the rolling machine is operable both as a traverse wedge rolling machine or a stretch rolling machine at different times.
3 more elements
A rolling machine, comprising:
- a) at least two rotatable or rotating rollers which are equipped or which can be equipped with tools for forming a workpiece which is located or which can be located between the rollers;
- and
- b) at least one drive for driving of the rollers;
- wherein the at least one drive comprises:
- i) at least one permanent magnet motor having a rated torque of about 5,000 Nm-about 80,000 Nm, and accelerating or decelerating to a rated rpm for operation of the roller(s) within a maximum rotary angle interval of at most about 3°;
- and
- ii) a converter for supplying electric power to the motor.
4 more elements
Dependencies are inferred from the claim text.