EP2233224A1 - Procédé de formage à froid de tubes métalliques - Google Patents

Procédé de formage à froid de tubes métalliques Download PDF

Info

Publication number: EP2233224A1
Authority: EP; European Patent Office
Prior art keywords: rolling; metal tube; deformation; carriages; mandrel
Prior art date: 2009-03-27
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP10002995A

Other languages

German (de)

English (en)

Other versions

EP2233224B1 (fr

Inventor

Manfred Blaich

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Konig Metall & Co KG GmbH

Original Assignee

Konig Metall & Co KG GmbH

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2009-03-27

Filing date

2010-03-22

Publication date

2010-09-29

2010-03-22 Application filed by Konig Metall & Co KG GmbH filed Critical Konig Metall & Co KG GmbH

2010-09-29 Publication of EP2233224A1 publication Critical patent/EP2233224A1/fr

2012-05-16 Application granted granted Critical

2012-05-16 Publication of EP2233224B1 publication Critical patent/EP2233224B1/fr

Status Not-in-force legal-status Critical Current

2030-03-22 Anticipated expiration legal-status Critical

Links

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling

Definitions

the invention relates to a method for cold forming of metal tubes by means of a linear forming unit, in which the metal tube to be formed between two rollers is rotatably supported such that the metal tube undergoes a deformation in a counter-parallel displacement of the rolling carriage by a roll bar arranged on one of the rolling strip.
the present invention the object of the invention to provide a method for cold forming of metal pipes, through which the metal pipes deformation can be added, in which it is not necessary to perform a single machining of each workpiece, nor the cold forming further steps to follow.
the metal tubes are clamped in the way of cold forming in a linear forming unit, that is rotatably supported about an axis of rotation, which is arranged between two rolling carriage.
the two rollers will move against each other parallel to each other, sweep each other in this way and continue driving to a stop, such that the workpiece is at any time between the two rollers.
On at least one of the rolling carriage is a rolling strip arranged with a profiling whose caliber presses during the rolling process in the workpiece and thereby makes the transformation.
Such a method can also and in particular be carried out with high-tempered steel pipes, in particular with so-called "tenaris" pipes, so that subsequently performed tempering of the end products thus produced is no longer necessary. It is also possible to simultaneously hold several workpieces parallel to one another between the rolling carriages, so that simultaneous machining of a whole series of workpieces is possible.
such a metal tube is to be accommodated on a rotatable mandrel bar, which holds the workpiece in a defined position between the rolling carriages. Due to the rotatable mounting of the mandrel rod and the metal tube on the mandrel rod a uniform impression of the deformation is ensured in the metal tube.
the mandrel bar can be made in two parts, so that a first part is introduced into the metal tube on one side, while the second mandrel rod section counteracts the metal tube from the other side.
the mandrel which in any case protrudes into the workpiece, can be designed with respect to its outer dimension such that the outer dimension corresponds to the desired internal dimension of the deformation.
the propulsion of the mandrel rod sections toward each other can be effected in particular by means of a mechanical propulsion, in particular a spindle propulsion, an electromechanical or a hydraulic propulsion, which can apply the force required for this purpose.
an arrangement of a plurality of mandrel rods can be provided parallel to one another between the two rolling carriages, as already mentioned.
caliber-comprising rolling strips it is provided to arrange such a rolling bar on both rolling carriage, so that a simultaneous two-sided deformation of the metal tube takes place.
a rolling bar only on a rolling carriage.
a rolling strip is provided on both rolling carriage, they are to be designed such that both the opposite direction of movement of the rolling carriage, as well as the opposite arrangement of the caliber is taken into account.
a continuously increasing height of the caliber is required in order to deepen the deformation continuously.
this is intended to create an over the length of the rolling strip increasingly high caliber, which has the final desired height in the end.
an end portion is provided, in which the height remains constant over a certain rolling section, in order to avoid an immediate relaxation of the material during the subsequent backward movement.
the pressure of the deformation depth ultimately desired is thus maintained constant in this way over a certain period of time.
the rolling carriage whose rolling strips have a constantly high caliber in this alternative embodiment, while maintaining the surface parallelism to each other to move.
Fig. 1 shows a linear forming unit 1 in a side sectional view, wherein the cut also one of the inserted workpieces, namely a metal tube 12 passes through the center.
the metal tube 12 is received on a mandrel bar 6, 6 'which is divided into two mandrel bar sections 6, 6'.
the two mandrel bar sections 6, 6 ' represent the axis of rotation 11 for the metal tube 12 about which the metal tube 12 rotates during a rolling operation.
the metal tube 12 is during a rolling process surrounded by two rolling carriages 3, 4, each of which is guided with an arrangement of rails 7 via a corresponding rail guide 8 with a roll stand 2, which essentially limits the forming unit 1 to the outside.
a spindle drive 9 is provided in the region of at least one of the mandrel rod sections 6, 6 ', which causes a compression of the metal tube 12 during the machining process and thus additional material to the deformation region of the metal tube 12 from the longitudinal extent of the metal tube 12 feeds.
a drive 10 ensures a uniform rotation of the mandrel bar 6, 6 '.
Fig. 2 shows the forming unit 1 in its initial position, ie in a position in which all caliber 16 of the rolling strips 5 are completely flat, so the metal tube 12 is flat between the rolling carriage 3, 4 clamped.
the Mandrel bars 6, 6 have in their inner region a mandrel tip 13 smaller outer circumference, whose outer circumference corresponds to the desired inner circumference of the deformation 14.
the forming unit 1 will therefore only be able to make a deformation 14 to the outer circumference of the mandrel tip 13. A constriction of the metal tube 12 is thus avoided.
the further shape of the mandrel tip 13 can further support the desired shape of the deformation 14.
Fig. 3 Finally, the forming unit 1 in its end position, in which the rolling bar 5 with its caliber 16 has impressed the greatest possible deformation 14 in the metal tube 12.
a deformation 14 is made on the side of the mandrel rod portion 6, while on the side of the mandrel rod portion 6 ', a nose opening 15 is formed.
the caliber height which otherwise increases as a result of the progress of the rolling process, is held in this end region over a period of time, so that a material relaxation and an expected re-deformation is avoided.
Fig. 4 shows a possible rolling bar 5 with an increasing over the length of the rolling bar 5 caliber 16.
the caliber 16 is completely flat, then increases continuously and finally has in an end portion 17 has a constant height, which for attitude the final pressure on the metal tube 12 added deformations 14 is provided.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Metal Rolling (AREA)

EP20100002995 2009-03-27 2010-03-22 Procédé de formage à froid de tubes métalliques Not-in-force EP2233224B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE200910003690 DE102009003690A1 (de)	2009-03-27	2009-03-27	Verfahren zur Kaltumformung von Metallrohren

Publications (2)

Publication Number	Publication Date
EP2233224A1 true EP2233224A1 (fr)	2010-09-29
EP2233224B1 EP2233224B1 (fr)	2012-05-16

Family

ID=42246173

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20100002995 Not-in-force EP2233224B1 (fr)	2009-03-27	2010-03-22	Procédé de formage à froid de tubes métalliques

Country Status (2)

Country	Link
EP (1)	EP2233224B1 (fr)
DE (1)	DE102009003690A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB393101A (en)	1932-07-04	1933-06-01	Friedrich Mulka	Process and device for shaping rods and tubes, without cuttings, parings or the like
DE1189514B (de)	1961-06-22	1965-03-25	Smeralovy Zd Y Narodni Podnik	Vorrichtung fuer das Walzen von Profilen in Ringe
US4787229A (en)	1986-07-14	1988-11-29	Fuji Tekko Co., Ltd.	Method of rolling a pipe by flat cutters
DE19905038A1 (de)	1999-02-08	2000-08-17	Fraunhofer Ges Forschung	Dorneinrichtung, Querwalzvorrichtung und Verfahren zur Herstellung quergewalzter, zumindest partiell hohler Körper

2009
- 2009-03-27 DE DE200910003690 patent/DE102009003690A1/de not_active Withdrawn
2010
- 2010-03-22 EP EP20100002995 patent/EP2233224B1/fr not_active Not-in-force

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB393101A (en)	1932-07-04	1933-06-01	Friedrich Mulka	Process and device for shaping rods and tubes, without cuttings, parings or the like
DE1189514B (de)	1961-06-22	1965-03-25	Smeralovy Zd Y Narodni Podnik	Vorrichtung fuer das Walzen von Profilen in Ringe
US4787229A (en)	1986-07-14	1988-11-29	Fuji Tekko Co., Ltd.	Method of rolling a pipe by flat cutters
DE19905038A1 (de)	1999-02-08	2000-08-17	Fraunhofer Ges Forschung	Dorneinrichtung, Querwalzvorrichtung und Verfahren zur Herstellung quergewalzter, zumindest partiell hohler Körper

Also Published As

Publication number	Publication date
DE102009003690A1 (de)	2010-09-30
EP2233224B1 (fr)	2012-05-16

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