US20100107713A1 - Method and device for rolling a rolling stock in a rolling mill with a cross-rolling mill - Google Patents
Method and device for rolling a rolling stock in a rolling mill with a cross-rolling mill Download PDFInfo
- Publication number
- US20100107713A1 US20100107713A1 US12/531,723 US53172308A US2010107713A1 US 20100107713 A1 US20100107713 A1 US 20100107713A1 US 53172308 A US53172308 A US 53172308A US 2010107713 A1 US2010107713 A1 US 2010107713A1
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- Prior art keywords
- rolling
- rolling mill
- mill
- stock
- planetary
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- Abandoned
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- 238000005096 rolling process Methods 0.000 title claims abstract description 226
- 238000000034 method Methods 0.000 title claims description 10
- 230000033001 locomotion Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
Definitions
- the invention relates to a method and a device for rolling a rolling stock in a rolling mill with a cross-rolling mill and claims the priority of the German patent application 10 2007 014 079.9.
- Rolling mills with cross-rolling mills are used for rolling, for example, seamless metal pipes or other rolling stock with a round cross-section, for example rods.
- rollers are arranged at the periphery of rolling stock to be rolled.
- the rolling stock is rotated between the rollers which rotate with the same rotation direction and is thereby deformed.
- the rollers are tilted at a certain angle with respect to the longitudinal axis of the rolling stock in the tangential plane. This arrangement then produces a helical movement of the rolling stock.
- the aforementioned construction of a cross-rolling mill has a number of disadvantages which may result from the rotation of the rolling stock about its longitudinal axis. This relates, in particular, to a limit for the maximal length of the rolling stock, complex support and guiding devices and a low throughput speed. Variations in the rotation of the rolling stock are detrimental for the quality of the rolling stock.
- German patent 195 10 715 C2 describes a planetary cross-rolling mill of this type.
- the structure of the device disclosed in DE 195 10 715 C2 has a rotor moved by way of a main drive, wherein four planetary rollers are rotatably supported in the rotor which surrounds the rolling stock. These planetary rollers rotate in unison with the rotor. In addition to rotation with the rotor, the planetary rollers are rotationally driven about their longitudinal axis by an additional drive.
- An additional rolling mill is frequently provided downstream of a planetary cross-rolling mill in order to continue the deformation process started by the planetary cross-rolling mill.
- a longitudinal rolling mill or an additional planetary cross-rolling mill can be arranged downstream.
- the invention is a based on the concept to roll the rolling stock, at least during a certain time period, simultaneously on a mandrel rod both in the planetary cross-rolling mill and in the additional rolling mill arranged downstream.
- the invention includes a mandrel rod which has a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction and, in particular, is greater than the hollow block length.
- the intent is to make the mandrel rod so long that it engages with at least one roller set of the downstream rolling mill, when the pipe exiting the planetary cross-rolling mill reaches that roller set.
- the mandrel rod comes into engagement when the wall thickness of the pipe is reduced by the rollers of the respective rolling mill on the mandrel rod.
- the invention makes it possible to better distribute the deformation work over the two rolling mills.
- the planetary cross-rolling mill can now be used to roll a first product which may have relaxed requirements for precision.
- the precise finish rolling is then performed in a downstream rolling mill.
- the wall thickness can be calibrated with the downstream rolling mill to the desired dimension without requiring reconfiguration.
- only a few mandrel rod with predetermined diameters need to be kept in inventory for the planetary cross-rolling mill, because the rolling stock can be deformed to any intermediate cross-section in the additional rolling mill. This reduces the number of mandrel rods that an operator must keep in inventory.
- the mandrel rod require less frequent changes which improves time utilization. Stretching of the milling stock can also be distributed to both stands which allows higher rolling speeds in the finish rolling mill.
- a rolling mill for rolling a rolling stock with a planetary cross-rolling mill and an additional rolling mill arranged downstream in a rolling direction has a mandrel rod of a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction, and that is, in particular, preferably longer than the hard block length.
- the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction is defined as the distance between the point of the planetary cross-rolling mill where the rolling stock is for the last time in engagement with the rollers of the planetary cross-rolling mill, and the point where the rolling stock is for the first time in engagement with the first rollers of the additional rolling mill.
- the mandrel rod is long enough to extend through the rolling stock while the rolling stock is both in the rolling gap of the planetary cross-rolling mill as well as in the rolling gap of the additional rolling mill.
- a holder for the mandrel rod which is able to hold the mandrel rod in a position where the mandrel rod extends through the rolling gap of the planetary cross-rolling mill and simultaneously protrudes at least partially into a rolling gap of the additional rolling mill.
- the holder is disposed on the side of the planetary cross-rolling mill that faces away from the additional rolling mill.
- a linear drive is provided for linearly moving the holder of the mandrel rod.
- the mandrel rod can be retracted for receiving the rolling stock, and the mandrel rod can then be brought into a position where the mandrel rod extends through the rolling gap of the planetary cross-rolling mill and simultaneously at least partially protrudes into a rolling gap of the additional rolling mill.
- a longitudinal rolling mill is arranged downstream of the planetary cross-rolling mill in the rolling direction.
- a longitudinal rolling mill is defined here as a rolling mill with rollers having axles that are arranged parallel to one another and/or perpendicular to the rolling direction.
- the mandrel rod is formed in several parts.
- the mandrel rod has in a preferred embodiment different diameters. If the mandrel rod is formed of several parts, then the change in diameter along the longitudinal axis of the mandrel rod can be easily adjusted, for example by removing a section with a smaller diameter and attaching on the remaining part of the mandrel rod a mandrel rod section with a somewhat larger diameter.
- a measuring device for measuring the rotation of the rolling stock is arranged between the additional rolling mill and the planetary cross-rolling mill.
- the additional rolling mail is a longitudinal rolling mill, where the rolling stock is to be rolled almost without rotation
- the planetary cross-rolling mill includes a main drive for rotating a rotor surrounding the rolling stock and planetary rollers rotatably supported in the rotor.
- the planetary cross-rolling mill also includes an additional drive for rotating the planetary rollers about their longitudinal axis.
- the planetary cross-rolling mill preferably includes three or more planetary rollers, in particular four planetary rollers.
- the rolling stock is located, during a time period when the rolling stock is rolled, both in a rolling gap of the planetary cross-rolling mill and also in a rolling gap of the additional rolling mill.
- the rolling stock is located both in the rolling gap of the planetary cross-rolling mill as well as in the rolling gap of the additional rolling mill.
- the rolling stock is either only in the rolling gap of the planetary cross-rolling mill or in the rolling gap of the additional rolling mill only during the necessary startup and shutdown phase.
- the mandrel rod extends through the rolling stock while the rolling stock is both in the rolling gap of the planetary cross-rolling mill and in the rolling gap of the additional rolling mill, wherein the mandrel rod has a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction.
- the method of the invention is preferably used for rolling tubular rolling stock into so-called loops.
- the rolling stock is preferably metallic, but may also be made of a different material, for example plastic.
- the method of the invention and the rolling mill of the invention are particularly suited for rolling predominantly thin-walled rolling stock.
- FIG. 1 shows in a schematic side view the rolling mill according to the invention with a planetary cross-rolling mill and a longitudinal rolling mill together with milling stock to be milled, and
- FIG. 2 shows in a schematic side view the rolling mill of FIG. 1 in a rolled-out state.
- FIG. 1 is a rolling mill with a planetary cross-rolling mill 20 , a longitudinal rolling mill 25 and an interposed measuring device 8 .
- a mandrel rod 10 is held in a holder 11 .
- a linear drive 12 is configured to linearly move the holder 11 .
- the mandrel rod 10 has a length which is greater than the distance between the planetary cross-rolling mill 20 and the longitudinal rolling mill 25 .
- the rolling stock 6 is rolled on a mandrel rod both in the planetary cross-rolling mill 20 as well as in the longitudinal rolling mill 25 .
- the planetary cross-rolling mill 20 includes several planetary rollers 1 which roll with their lower sections on the rolling stock 6 .
- the planetary rollers 1 are inclined relative to the longitudinal axis of the rolling stock 6 both in the vertical and in the horizontal plane.
- the rearward end of the planetary rollers 1 is rotatably supported in a rotor 2 having a rotation axis that is identical with the longitudinal axis of the rolling stock.
- the rotor 2 is driven from the driveshaft 3 of a main drive by way of a gear.
- the rotor 2 and the planetary rollers 1 supported in the rotor rotate about the rolling stock 6 .
- gear wheels 4 which mesh with a planetary gear 5 are disposed on the planetary rollers 1 . Meshing with the planetary gear 5 causes the planetary rollers 1 , due to the rotation of the rotor 2 , to rotate about their own axis.
- the planetary gear 5 is driven via a gear by the driveshaft 7 of an additional drive. This rotation of the planetary gear results in a superimposed rotation of the planetary rollers 1 which is the result of the sum of the two rotary motions.
- the rolling stock 6 does not rotate due to the superimposed rotations of the planetary rollers 1 and the rotor 2 . While the rolling operation continues, the required ratio between the number of rotations of the rotor 2 and of the planetary rollers 1 changes due to changes in the parameters, for example changes of the material characteristic of the material of the rolling stock in certain areas, temperature variations, scale deposits or changes in the surface friction parameters.
- a measuring device 8 is arranged at the exit of the planetary cross-rolling mill, wherein the measuring device 8 measures the rotary motion n Pipe of the rolling stock 6 that may be caused by changes in the parameters, and transmits the rotary motion to a computer which then controls the drives of the planetary cross-rolling mill 20 so as to prevent the pipe from rotating.
- FIG. 2 shows the rolling mill in a so-called “rolled-off” state where the mandrel rod 10 protrudes from the end of the longitudinal rolling mill 25 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention relates to a rolling mill for rolling stock to be rolled (6), having a planetary cross-rolling mill (20) and a subsequent further rolling mill in the rolling direction, the subsequent mill comprising a mandrel rod (10) having a length that is larger than the distance between the planetary cross-rolling mill (20) and the further rolling mill in the rolling direction.
Description
- The invention relates to a method and a device for rolling a rolling stock in a rolling mill with a cross-rolling mill and claims the priority of the
German patent application 10 2007 014 079.9. - Rolling mills with cross-rolling mills are used for rolling, for example, seamless metal pipes or other rolling stock with a round cross-section, for example rods.
- In a cross-rolling mill, several rollers are arranged at the periphery of rolling stock to be rolled. The rolling stock is rotated between the rollers which rotate with the same rotation direction and is thereby deformed. For moving the rolling stock in the longitudinal direction, the rollers are tilted at a certain angle with respect to the longitudinal axis of the rolling stock in the tangential plane. This arrangement then produces a helical movement of the rolling stock.
- The aforementioned construction of a cross-rolling mill has a number of disadvantages which may result from the rotation of the rolling stock about its longitudinal axis. This relates, in particular, to a limit for the maximal length of the rolling stock, complex support and guiding devices and a low throughput speed. Variations in the rotation of the rolling stock are detrimental for the quality of the rolling stock.
- These disadvantages have led to the development of planetary cross-rolling mills which superimpose the rotation motions of several components to thereby allow milling without rotating the rolling stock about its longitudinal axis. The German patent 195 10 715 C2 describes a planetary cross-rolling mill of this type. The structure of the device disclosed in DE 195 10 715 C2 has a rotor moved by way of a main drive, wherein four planetary rollers are rotatably supported in the rotor which surrounds the rolling stock. These planetary rollers rotate in unison with the rotor. In addition to rotation with the rotor, the planetary rollers are rotationally driven about their longitudinal axis by an additional drive.
- An additional rolling mill is frequently provided downstream of a planetary cross-rolling mill in order to continue the deformation process started by the planetary cross-rolling mill. For example, a longitudinal rolling mill or an additional planetary cross-rolling mill can be arranged downstream.
- It is an object of the invention to propose a method and a device which obviates the aforementioned disadvantages and enhances the efficiency of the rolling process.
- The object is attained with the features of the independent claims. Advantageous embodiments are recited in the dependent claims.
- The invention is a based on the concept to roll the rolling stock, at least during a certain time period, simultaneously on a mandrel rod both in the planetary cross-rolling mill and in the additional rolling mill arranged downstream. The invention includes a mandrel rod which has a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction and, in particular, is greater than the hollow block length. The intent is to make the mandrel rod so long that it engages with at least one roller set of the downstream rolling mill, when the pipe exiting the planetary cross-rolling mill reaches that roller set. The mandrel rod comes into engagement when the wall thickness of the pipe is reduced by the rollers of the respective rolling mill on the mandrel rod.
- More particularly, the invention makes it possible to better distribute the deformation work over the two rolling mills. The planetary cross-rolling mill can now be used to roll a first product which may have relaxed requirements for precision. The precise finish rolling is then performed in a downstream rolling mill. With this approach, the rollers in the planetary cross-rolling mill need to be changed less frequently. The wall thickness can be calibrated with the downstream rolling mill to the desired dimension without requiring reconfiguration. Moreover, only a few mandrel rod with predetermined diameters need to be kept in inventory for the planetary cross-rolling mill, because the rolling stock can be deformed to any intermediate cross-section in the additional rolling mill. This reduces the number of mandrel rods that an operator must keep in inventory. In addition, the mandrel rod require less frequent changes which improves time utilization. Stretching of the milling stock can also be distributed to both stands which allows higher rolling speeds in the finish rolling mill.
- According to the invention, a rolling mill for rolling a rolling stock with a planetary cross-rolling mill and an additional rolling mill arranged downstream in a rolling direction, has a mandrel rod of a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction, and that is, in particular, preferably longer than the hard block length. The distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction is defined as the distance between the point of the planetary cross-rolling mill where the rolling stock is for the last time in engagement with the rollers of the planetary cross-rolling mill, and the point where the rolling stock is for the first time in engagement with the first rollers of the additional rolling mill.
- As intended with the invention, the mandrel rod is long enough to extend through the rolling stock while the rolling stock is both in the rolling gap of the planetary cross-rolling mill as well as in the rolling gap of the additional rolling mill.
- In a preferred embodiment, a holder for the mandrel rod is provided which is able to hold the mandrel rod in a position where the mandrel rod extends through the rolling gap of the planetary cross-rolling mill and simultaneously protrudes at least partially into a rolling gap of the additional rolling mill. In a preferred embodiment, the holder is disposed on the side of the planetary cross-rolling mill that faces away from the additional rolling mill. In a preferred embodiment, a linear drive is provided for linearly moving the holder of the mandrel rod. In this way, the mandrel rod can be retracted for receiving the rolling stock, and the mandrel rod can then be brought into a position where the mandrel rod extends through the rolling gap of the planetary cross-rolling mill and simultaneously at least partially protrudes into a rolling gap of the additional rolling mill.
- In a preferred embodiment, a longitudinal rolling mill is arranged downstream of the planetary cross-rolling mill in the rolling direction. A longitudinal rolling mill is defined here as a rolling mill with rollers having axles that are arranged parallel to one another and/or perpendicular to the rolling direction.
- In a preferred embodiment, the mandrel rod is formed in several parts. The mandrel rod has in a preferred embodiment different diameters. If the mandrel rod is formed of several parts, then the change in diameter along the longitudinal axis of the mandrel rod can be easily adjusted, for example by removing a section with a smaller diameter and attaching on the remaining part of the mandrel rod a mandrel rod section with a somewhat larger diameter.
- In a preferred embodiment, a measuring device for measuring the rotation of the rolling stock is arranged between the additional rolling mill and the planetary cross-rolling mill. In particular, when the additional rolling mail is a longitudinal rolling mill, where the rolling stock is to be rolled almost without rotation, it is advantageous to provide a controller for the planetary cross-rolling mill, which controls the operation of the planetary cross-rolling mill based on measurements from the measuring device such that the rolling stock does not rotate. For the actual structure of a device that performs such a control function and for an actual methods for such control, reference is made to DE 103 49 056 A1, the disclosure in these application documents is incorporated herein by reference.
- In a preferred embodiment, the planetary cross-rolling mill includes a main drive for rotating a rotor surrounding the rolling stock and planetary rollers rotatably supported in the rotor. In a preferred embodiment, the planetary cross-rolling mill also includes an additional drive for rotating the planetary rollers about their longitudinal axis. For a preferred structure of a planetary cross-rolling mill, reference is also made to DE 195 10 715 C2 which describes as part of the written description a configuration for a planetary cross-rolling mill. The planetary cross-rolling mill preferably includes three or more planetary rollers, in particular four planetary rollers.
- In the method of the invention for rolling a rolling stock in a rolling mill with a planetary cross-rolling mill and an additional rolling mill arranged downstream in a rolling direction, the rolling stock is located, during a time period when the rolling stock is rolled, both in a rolling gap of the planetary cross-rolling mill and also in a rolling gap of the additional rolling mill. Preferably, during the major portion of the rolling operation, the rolling stock is located both in the rolling gap of the planetary cross-rolling mill as well as in the rolling gap of the additional rolling mill. Preferably, the rolling stock is either only in the rolling gap of the planetary cross-rolling mill or in the rolling gap of the additional rolling mill only during the necessary startup and shutdown phase.
- The mandrel rod extends through the rolling stock while the rolling stock is both in the rolling gap of the planetary cross-rolling mill and in the rolling gap of the additional rolling mill, wherein the mandrel rod has a length that is greater than the distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction.
- The method of the invention is preferably used for rolling tubular rolling stock into so-called loops. The rolling stock is preferably metallic, but may also be made of a different material, for example plastic.
- The method of the invention and the rolling mill of the invention are particularly suited for rolling predominantly thin-walled rolling stock.
- The invention will now be described with reference to a drawing which shows an exemplary embodiment.
-
FIG. 1 shows in a schematic side view the rolling mill according to the invention with a planetary cross-rolling mill and a longitudinal rolling mill together with milling stock to be milled, and -
FIG. 2 shows in a schematic side view the rolling mill ofFIG. 1 in a rolled-out state. -
FIG. 1 is a rolling mill with aplanetary cross-rolling mill 20, a longitudinal rollingmill 25 and an interposed measuring device 8. Amandrel rod 10 is held in aholder 11. Alinear drive 12 is configured to linearly move theholder 11. As illustrated inFIG. 1 , themandrel rod 10 has a length which is greater than the distance between theplanetary cross-rolling mill 20 and the longitudinal rollingmill 25. The rollingstock 6 is rolled on a mandrel rod both in the planetarycross-rolling mill 20 as well as in thelongitudinal rolling mill 25. - The planetary
cross-rolling mill 20 includes severalplanetary rollers 1 which roll with their lower sections on the rollingstock 6. Theplanetary rollers 1 are inclined relative to the longitudinal axis of therolling stock 6 both in the vertical and in the horizontal plane. - The rearward end of the
planetary rollers 1 is rotatably supported in a rotor 2 having a rotation axis that is identical with the longitudinal axis of the rolling stock. The rotor 2 is driven from thedriveshaft 3 of a main drive by way of a gear. The rotor 2 and theplanetary rollers 1 supported in the rotor rotate about the rollingstock 6. - In addition, gear wheels 4 which mesh with a planetary gear 5 are disposed on the
planetary rollers 1. Meshing with the planetary gear 5 causes theplanetary rollers 1, due to the rotation of the rotor 2, to rotate about their own axis. - The planetary gear 5 is driven via a gear by the driveshaft 7 of an additional drive. This rotation of the planetary gear results in a superimposed rotation of the
planetary rollers 1 which is the result of the sum of the two rotary motions. - The rolling
stock 6 does not rotate due to the superimposed rotations of theplanetary rollers 1 and the rotor 2. While the rolling operation continues, the required ratio between the number of rotations of the rotor 2 and of theplanetary rollers 1 changes due to changes in the parameters, for example changes of the material characteristic of the material of the rolling stock in certain areas, temperature variations, scale deposits or changes in the surface friction parameters. A measuring device 8 is arranged at the exit of the planetary cross-rolling mill, wherein the measuring device 8 measures the rotary motion nPipe of therolling stock 6 that may be caused by changes in the parameters, and transmits the rotary motion to a computer which then controls the drives of the planetarycross-rolling mill 20 so as to prevent the pipe from rotating. -
FIG. 2 shows the rolling mill in a so-called “rolled-off” state where themandrel rod 10 protrudes from the end of thelongitudinal rolling mill 25.
Claims (9)
1.-8. (canceled)
9. A rolling mill for rolling a rolling stock, comprising:
a planetary cross-rolling mill;
an additional rolling mill arranged downstream of the planetary cross-rolling mill in a rolling direction; and
a mandrel rod having a length that is greater than a distance between the planetary cross-rolling mill and the additional rolling mill in the rolling direction.
10. The rolling mill of claim 9 , further comprising a holder which holds the mandrel rod in a position where the mandrel rod extends through a rolling gap of the planetary cross-rolling mill and protrudes at least partially into a rolling gap of the additional rolling mill.
11. The rolling mill of claim 10 , further comprising a linear drive which linearly moves the holder of the mandrel rod.
12. The rolling mill of claim 9 , wherein the additional rolling mill is a longitudinal rolling mill.
13. The rolling mill of claim 9 , wherein the mandrel rod is formed in several parts.
14. The rolling mill of claim 9 , further comprising a measuring device arranged between the additional rolling mill and the planetary cross-rolling mill, wherein the measuring device measures a rotation of the rolling stock.
15. The rolling mill of claim 9 , further comprising a rotor surrounding the rolling stock; planetary rollers rotatably supported in the rotor; a main drive for rotating the rotor; and an additional drive for rotating the planetary rollers about respective longitudinal axes.
16. A method for rolling a rolling stock in a rolling mill having a planetary cross-rolling mill and an additional rolling mill arranged downstream in a rolling direction, said method comprising the steps of:
arranging the rolling stock, during a time period when the rolling stock is rolled, both in a rolling gap of the planetary cross-rolling mill and also in a rolling gap of the additional rolling mill; and
extending a mandrel rod through the rolling stock while the rolling stock is arranged both in the rolling gap of the planetary cross-rolling mill and also in the rolling gap of the additional rolling mill,
wherein the mandrel rod has a length that is greater than a distance between the planetary cross-rolling mill a and the additional rolling mill in the rolling direction.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007014079A DE102007014079A1 (en) | 2007-03-21 | 2007-03-21 | Method and device for rolling rolling in a rolling mill with a cross rolling mill |
DE102007014079.9 | 2007-03-21 | ||
PCT/EP2008/002235 WO2008113588A1 (en) | 2007-03-21 | 2008-03-20 | Method and device for rolling a product to be rolled in a rolling mill having a cross-rolling mill |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100107713A1 true US20100107713A1 (en) | 2010-05-06 |
Family
ID=39429071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/531,723 Abandoned US20100107713A1 (en) | 2007-03-21 | 2008-03-20 | Method and device for rolling a rolling stock in a rolling mill with a cross-rolling mill |
Country Status (8)
Country | Link |
---|---|
US (1) | US20100107713A1 (en) |
EP (1) | EP2121208B1 (en) |
JP (1) | JP2010521317A (en) |
CN (1) | CN101657275A (en) |
AT (1) | ATE524248T1 (en) |
DE (1) | DE102007014079A1 (en) |
RU (1) | RU2009138747A (en) |
WO (1) | WO2008113588A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9616476B2 (en) | 2011-06-07 | 2017-04-11 | Sms Group Gmbh | Device and method for rolling of pipe blanks |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4501134A (en) * | 1982-06-03 | 1985-02-26 | Kocks Technik Gmbh & Co. | Rolling mill plants |
US5305624A (en) * | 1991-05-22 | 1994-04-26 | Mannesmann Aktiengesellschaft A Corp. Of The Federal Republic Of Germany | Sizing-stand group |
US6497129B2 (en) * | 2000-06-14 | 2002-12-24 | Sms Demag Ag | Method for rolling tube blanks in a planetary skew rolling mill |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2580098B2 (en) * | 1992-04-06 | 1997-02-12 | 新日本製鐵株式会社 | Bar and tube rolling equipment |
DE19510715C2 (en) | 1995-03-24 | 2002-08-29 | Kocks Technik | Device for cross-rolling of tubular or rod-shaped rolling stock |
DE19527795C2 (en) * | 1995-07-19 | 1999-11-18 | Mannesmann Ag | Pipe cold rolling mill |
DE10349056A1 (en) | 2003-10-17 | 2005-05-19 | Kocks Technik Gmbh & Co. Kg | Process for rolling rolling stock e.g. metal rods in a rolling mill comprises measuring the rotation of the rolling stock about its longitudinal direction, and controlling a drive parameter of a planetary cross rolling mill |
-
2007
- 2007-03-21 DE DE102007014079A patent/DE102007014079A1/en not_active Withdrawn
-
2008
- 2008-03-20 JP JP2010500117A patent/JP2010521317A/en not_active Withdrawn
- 2008-03-20 AT AT08716648T patent/ATE524248T1/en active
- 2008-03-20 CN CN200880009123A patent/CN101657275A/en active Pending
- 2008-03-20 RU RU2009138747/02A patent/RU2009138747A/en not_active Application Discontinuation
- 2008-03-20 US US12/531,723 patent/US20100107713A1/en not_active Abandoned
- 2008-03-20 WO PCT/EP2008/002235 patent/WO2008113588A1/en active Application Filing
- 2008-03-20 EP EP08716648A patent/EP2121208B1/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4501134A (en) * | 1982-06-03 | 1985-02-26 | Kocks Technik Gmbh & Co. | Rolling mill plants |
US5305624A (en) * | 1991-05-22 | 1994-04-26 | Mannesmann Aktiengesellschaft A Corp. Of The Federal Republic Of Germany | Sizing-stand group |
US6497129B2 (en) * | 2000-06-14 | 2002-12-24 | Sms Demag Ag | Method for rolling tube blanks in a planetary skew rolling mill |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9616476B2 (en) | 2011-06-07 | 2017-04-11 | Sms Group Gmbh | Device and method for rolling of pipe blanks |
Also Published As
Publication number | Publication date |
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ATE524248T1 (en) | 2011-09-15 |
EP2121208A1 (en) | 2009-11-25 |
EP2121208B1 (en) | 2011-09-14 |
WO2008113588A1 (en) | 2008-09-25 |
DE102007014079A1 (en) | 2008-09-25 |
CN101657275A (en) | 2010-02-24 |
RU2009138747A (en) | 2011-04-27 |
JP2010521317A (en) | 2010-06-24 |
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