# US 7,406,853 B2 · Rolling machine and method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,406,853 B2 - Document ID: US7406853B2 - Status: Granted - Kind: B2 - Application number: 11/463,113 - Filed: 2006-08-08 - Published: 2007-03-01 - Granted: 2008-08-05 - Earliest claimed: 2003-03-04 - Assignees: Langenstein & Schemann GmbH - Inventors: Guenter Hofmann; Stelios Katsibardis; Sigfried Hausdoerfer; Henry Zwilling; Guenther Vogler; Herbert Rueger - Web page: https://patentgrep.com/patent/US7406853B2 ## CPC - B21H 1/00: Making articles shaped as bodies of revolution (rolling tubes B21B17/00 - B21B25/00) - B21B 37/58: Roll-force control; Roll-gap control {(B21B38/105 takes precedence)} - B21H 1/18: cylinders, e.g. rolled transversely {cross-rolling} - B21B 31/04: with tie rods {in frameless stands}, e.g. prestressed tie rods - B21B 31/08: Interchanging rolls, roll mountings, or stand frames {, e.g. using C-hooks; Replacing roll chocks on roll shafts} - B21B 35/00: Drives for metal-rolling mills {, e.g. hydraulic drives} - B21B 35/141: {Rigid spindle couplings, e.g. coupling boxes placed on roll necks (rigid couplings in general F16D1/00)} - B21B 37/46: Roll speed or drive motor control (B21B37/52, B21B37/60 take precedence) - B21H: MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS (essentially from sheet metal B21D) - B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04) ## 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. ## Claims ### Claim 1 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°. ### Claim 2 (depends on 1) A rolling machine according to claim 1, wherein each permanent magnet motor is accelerated or decelerated to the rated rpm for operation of the roller(s) within a maximum rotary angle interval of at most about 2.2°. ### Claim 3 (depends on 1) A rolling machine according to claim 1, wherein each permanent magnet motor has a rated rpm between about 20 rpm-about 800 rpm. ### Claim 4 (depends on 1) A rolling machine according to claim 1, further comprising a common drive for at least two of the rollers which comprises in addition to at least one permanent magnet motor at least one gear train for transfer of the rotational force or rotary motion of the permanent magnet motor to at least two rollers. ### Claim 5 (depends on 4) A rolling machine according to claim 4, wherein the gear train comprises at least one central driving gear which is coupled to a driven shaft of the permanent magnet motor and two roller gears which are coupled to one of the rollers at a time and which are engaged or can be engaged to the driving gear. ### Claim 6 (depends on 4) A rolling machine according to claim 4, wherein a transmission ratio of the gear train from the drive motor to each of the rollers is the same and/or is in the range between about 1:1-about 1:1.5. ### Claim 7 (depends on 6) A rolling machine according to claim 6, wherein a tooth profile play or tooth engagement of roller gears to the driving gear can be adjusted or corrected. ### Claim 8 (depends on 7) A rolling machine according to claim 7, further comprising means for moving the driving gear optionally together with the permanent magnet motor relative to the roller gears. ### Claim 9 (depends on 7) A rolling machine according to claim 7, further comprising at least one adjustment drive. ### Claim 10 (depends on 1) A rolling machine according to claim 1, further comprising means for setting the relative angular position of the two rollers to one another. ### Claim 11 (depends on 10) A rolling machine according to claim 10, wherein the means for setting the relative angular position of the two working rollers comprises a worm wheel coupled to one of the rollers. ### Claim 12 (depends on 1) A rolling machine according to claim 1, further comprising at least one drive being assigned to each roller for independent driving of the rollers. ### Claim 13 (depends on 1) A rolling machine according to claim 1, wherein at least one drive has a converter for supplying electric power to the motor. ### Claim 14 (depends on 1) A rolling machine according to claim 1, further comprising at least one position detection means for detecting or determining the rotary position of at least one of the rollers. ### Claim 15 (depends on 1) A rolling machine according to claim 1, wherein the rollers in cross-section have wedge-shaped or triangular profile tools increasing along the periphery in their radial dimension in one direction and/or run obliquely to the axis of rotation of the pertinent roller. ### Claim 16 (depends on 1) A rolling machine according to claim 1, wherein the at least one drive comprises a torque motor. ### Claim 17 (depends on 1) A rolling machine according to claim 1, wherein the at least one permanent magnet motor has a rated torque of about 35,000 Nm-about 60,000 Nm. ### Claim 18 (depends on 1) A rolling machine according to claim 1, wherein each permanent magnet motor has a rated rpm between about 30 rpm-about 500 rpm. ### Claim 19 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. ### Claim 20 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.