EP1293268A1 - Verfahren zum Betreiben eines Kaltpilgerwalzwerks und Kaltpilgerwalzwerk - Google Patents
Verfahren zum Betreiben eines Kaltpilgerwalzwerks und Kaltpilgerwalzwerk Download PDFInfo
- Publication number
- EP1293268A1 EP1293268A1 EP02016148A EP02016148A EP1293268A1 EP 1293268 A1 EP1293268 A1 EP 1293268A1 EP 02016148 A EP02016148 A EP 02016148A EP 02016148 A EP02016148 A EP 02016148A EP 1293268 A1 EP1293268 A1 EP 1293268A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- braking device
- rolling mill
- pipe
- during
- Prior art date
- 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
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001133 acceleration Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
Definitions
- the invention relates to a method for operating a cold pilger rolling mill Manufacture of a tube in which a reciprocating mill stand stored cold vocational roller pair the one to be manufactured or machined Pipe during a preliminary stroke and during a subsequent stroke Return stroke rolls, the finished machined at least during the preliminary stroke Part of the tube is moved in the conveying direction of the tube and the finished part of the pipe in a discharge area by means of a braking device is braked.
- the invention further relates to a cold pilger rolling mill.
- the pipe On the outlet side of the rolling mill, the pipe is usually over the full pipe length rolled into a straight discharge channel. However, the outlet does not have to be straight his. Small, flexible pipes may need to be saved Space for the rolling mill the pipe can also be routed under the hut floor. It can also be coated directly in a holding device. For buffering the pipe is then usually guided in a compensation curve. For guiding the pipe deflecting rollers that can be swiveled into the outlet area can be provided.
- the bob weights in cold pilger rolling are subject to requirements the pipe manufacturer is getting bigger. This means that the axial, i.e. in the conveying direction, also grow the acceleration forces of the tube, which are considerable are; Forces of up to 150 kN and above have already been registered. This Forces when decelerating (braking) the pipe cause the pipe to stop the clamping devices and the caliber can no longer be held securely and causes an unwanted feed (“self-feed effect"). This can lead to serious pipe defects and must therefore be avoided.
- a friction element (brake) is provided, which is constantly abuts the pipe and exerts a permanent braking force on it.
- the invention is therefore based on the object of providing a method for operating a cold pilger rolling mill and an appropriately equipped cold pilger rolling mill which enable an increase in productivity while at the same time eliminating the disadvantages mentioned.
- this object is achieved in that the braking device is activated and deactivated in a time-controlled manner as a function of predetermined process parameters.
- it is contemplated to activate the braking device when axial acceleration forces that are above a predetermined value occur in the tube and to deactivate the braking device when the acceleration forces are below the predetermined value.
- a preferred embodiment and particularly simple implementation of the method is achieved when the braking device at least during part of the Time or path of the preliminary stroke activated and during the rest of the working cycle is deactivated; it is particularly preferred to consider the Braking device approximately during the second half of the time or the path of the Activate pre-stroke and deactivate the remaining time of the pre-stroke.
- the braking device can advantageously be actuated so strongly in the activated state that that there is no relative movement between the pipe and the braking device in Direction of conveyance of the pipe comes.
- the main idea of the invention thus aims at a time-controlled or regulated pulsating braking device for the tube, the braking force in particular should only be applied when the main mass retarding forces work in the pipe; this is mostly during the second half the working caliber length on the forward stroke the case.
- the brake remains inactive, so that the longitudinal movement of the tube in the conveying direction and the rotational movement of the tube are not affected.
- a reduction in the stroke rate of the roll stand is not necessary, so that the efficiency of the cold pilger rolling process can be increased significantly can.
- the brake activated in the decisive cycle sections also leads to that natural vibrations in the pipe are dampened, which are forced Superimpose vibrations from the rolling process itself.
- the process is particularly advantageous when cold pilger rolling long copper pipes used with a high unit weight.
- the cold pilger rolling mill according to the invention has a reciprocating movement Roll stand, an outlet area for the finished pipe and a braking device to brake the pipe. According to the invention, this rolling mill is characterized by means of time-controlled actuation of the braking device.
- the braking device is at a distance from the roll stand arranged in the outlet area. Furthermore, the braking device can at least comprise a braking element, which by means of a motor, preferably by means of a Electric motor, can be operated.
- a gearbox can be used between the brake element and the motor to operate the brake be arranged, with a rack and pinion gear proving particularly useful Has.
- At least one hydraulic cylinder can advantageously also be actuated of the braking element are used.
- the lateral boundary surfaces of the means for deflecting are arranged to be movable perpendicular to the conveying direction of the tube. You can then moved out of the outlet area for the purpose of removing the tube be, which facilitates the removal of the tube.
- the means for deflecting the tube are advantageously designed so that they at least form an S-shaped conveyor section in the outlet area.
- these means at least two substantially circular sections have, which laterally limit the outlet area.
- the cold pilger rolling process is shown schematically in FIGS. 1a and 1b. He is used to manufacture or form a tube 1 by means of a pair of cold pilger rollers 3, which is mounted in a roll stand, not shown. The one to be processed Tube 1 is guided on a rolling mandrel 14. The rolling mill is completed an oscillating movement during the rolling process, with stroke frequencies up to 300 per minute and more are possible.
- the tube 1 is moved in the conveying direction R during the rolling process. While of the forward stroke, which is schematically sketched in Fig. 1a, rolls the cold pilger roller pair 3 in the conveying direction R on the tube 1; during the return stroke, which in Fig. 1b is outlined, the rolling of the pair of rollers 3 takes place on the tube 1 counter Direction of delivery R (see arrows for direction of rotation and direction of transfer).
- Fig. 2 the acceleration force is an example for a tube weight of 500 kg applied in the tube over a working cycle of the cold pilger rolling process.
- a cycle lasts 200 ms.
- the force peaks occurring here are approx. 150 kN.
- FIGS. 3a and 3a For targeted control of the process even with high values for the mass forces the embodiment outlined in FIGS. 3a and 3a is provided.
- the pipe 1 is conveyed behind the roll stand 2 into an outlet area 4.
- a braking device 5 is activated.
- the braking device 5 is arranged at a distance a from the roll stand.
- the distance a is preferably at least 5 meters.
- the braking device 5 is dependent on predetermined process parameters time activated or deactivated.
- the braking device is also sufficient 5 via the means 6 during the second half of the time or the path of the preliminary stroke to activate; the remaining time of the working cycle, the brake 5 over the means 6 deactivated.
- the Control or regulating means 6 then a corresponding signal from the roll stand 2, that is used to control the brake 5.
- 3a also schematically indicates that when the brake 5 is deactivated, a Rotation of the tube can take place, as is common in cold pilger rolling.
- the braking device 5 has two stamp-like braking elements 7 which clamp the tube 1 when the brake 5 is actuated.
- the braking elements 7 are on Racks arranged, the feed movement of the braking elements 7 perpendicular to the conveying direction R. For this there is a gear rack and pinion gear 9 provided, which is driven by an electric motor 8 becomes.
- a cold pilger rolling process can thus proceed as follows: With brake 5 open the pipe is pushed forward and rotated. Then the first one Half of the advance stroke was carried out with the brake still open. The brake 5 is then closed and the second half of the preliminary stroke is carried out. The Brake 5 is then opened again and the rest of the work cycle is run.
- means 10 for deflecting the tube 1 are perpendicular to the conveying direction intended.
- these means 10 consist of a guide channel for the tube, which is in the conveying direction R has a wavy shape: the lateral boundary surfaces 11 of the means 10, that is, the wavy guide channel, have an S-shaped Course, which is marked with the reference numeral 12 in Fig. 3.
- the boundaries are composed of arcuate sections 13.
- the wavy contour of the guide channel shaped so that the tube when open (i.e. deactivated) Braking device 5 also takes a slightly undulating course when it passes the guide channel.
- the waveform induced in this way is fully formed in the outlet area 4 (Compare Fig. 3a with Fig. 3b), so that there are no tensions in the tube can.
- the outlet area 4 is characterized by a small overall width.
- the lateral boundary surfaces can 11 of the guide channel move perpendicular to the conveying direction R. become what is indicated by the double arrows in Fig. 3b. So that Handling of the finished tube 1 can be facilitated.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Medicines Containing Plant Substances (AREA)
- Braking Arrangements (AREA)
Abstract
Description
- Fig. 1a
- schematisch die Seitenansicht eines Kaltpilgerwalzenpaars während des Vorhubs des Kaltpilgerwalzprozesses,
- Fig. 1b
- die entsprechende Ansicht gemäß Fig. 1a während des Rückhubes,
- Fig. 2
- schematisch den Verlauf der Massenkräfte im Rohr über der Zeit,
- Fig. 3a
- schematisch die Draufsicht auf ein Kaltpilgerwalzwerk bei nicht aktivierter Bremseinrichtung,
- Fig. 3b
- die zu Fig. 2a entsprechende Ansicht während aktivierter Bremseinrichtung und
- Fig. 4
- schematisch die Bremseinrichtung mit einigen Details.
- 1
- Rohr
- 2
- Walzgerüst
- 3
- Kaltpilgerwalzenpaar
- 4
- Auslaufbereich
- 5
- Bremseinrichtung
- 6
- Mittel zum zeitlichen Steuern der Bremseinrichtung 5
- 7
- Bremselement
- 8
- Motor
- 9
- Getriebe
- 10
- Mittel zum Auslenken des Rohres 1
- 11
- seitliche Begrenzungsflächen des Mittels 10
- 12
- S-förmiger Förderabschnitt
- 13
- kreisbogenförmiger Abschnitt
- 14
- Walzdorn
- R
- Förderrichtung des Rohres 1
- a
- Abstand zwischen Walzgerüst 2 und Bremseinrichtung 5
Claims (18)
- Verfahren zum Betreiben eines Kaltpilgerwalzwerks zur Herstellung eines Rohrs (1), bei dem ein in einem hin- und herbewegbaren Walzgerüst (2) gelagertes Kaltpilgerwalzenpaar (3) das herzustellende bzw. zu bearbeitende Rohr (1) während eines Vorhubes und während eines sich an den Vorhub anschließenden Rückhubes walzt, wobei zumindest während des Vorhubes der fertig bearbeitete Teil des Rohres (1) in Förderrichtung (R) des Rohres (1) bewegt wird und wobei der fertig bearbeitete Teil des Rohres (1) in einem Auslaufbereich (4) mittels einer Bremseinrichtung (5) abgebremst wird,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) in Abhängigkeit vorgegebener Prozessparameter zeitlich gesteuert aktiviert und deaktiviert wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) aktiviert wird, wenn im Rohr (1) axiale Verzögerungskräfte auftreten, die über einem vorgegebenen Wert liegen und die Bremseinrichtung (5) deaktiviert wird, wenn die Verzögerungskräfte unter dem vorgegebenen Wert liegen. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) zumindest während eines Teils der Zeit oder des Weges des Vorhubes aktiviert und während des restlichen Arbeitszykluses deaktiviert wird. - Verfahren nach Anspruch 3,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) etwa während der zweiten Hälfte der Zeit des Vorhubes aktiviert wird und während der restlichen Zeit des Vorhubs deaktiviert wird. - Verfahren nach Anspruch 3,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) etwa während der zweiten Hälfte des Weges des Vorhubes aktiviert wird und über den restlichen Weg des Vorhubs deaktiviert wird. - Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) im aktivierten Zustand so stark betätigt wird, dass es zu keiner Relativbewegung zwischen Rohr (1) und Bremseinrichtung (5) in Förderrichtung (R) des Rohres (1) kommt. - Kaltpilgerwalzwerk zur Herstellung eines Rohrs (1), insbesondere zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 6, mitgekennzeichnet durch,einem sich hin- und herbewegbaren Walzgerüst (2),einem Auslaufbereich (4) für das fertige Rohr (1) undeiner Bremseinrichtung (5) zum Abbremsen des Rohrs (1),
Mittel (6) zum zeitlich gesteuerten Betätigen der Bremseinrichtung (5). - Walzwerk nach Anspruch 7,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) mit Abstand (a) vom Walzgerüst (2) im Auslaufbereich (4) angeordnet ist. - Walzwerk nach Anspruch 7 oder 8,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) mindestens ein Bremselement (7) umfasst, das mittels eines Motors (8), vorzugsweise mittels eines Elektromotors, betätigt werden kann. - Walzwerk nach Anspruch 9,
dadurch gekennzeichnet, dass zwischen Bremselement (7) und Motor (8) ein Getriebe (9) angeordnet ist. - Walzwerk nach Anspruch 10,
dadurch gekennzeichnet, dass das Getriebe (9) ein Zahnrad-Zahnstangen-Getriebe ist. - Walzwerk nach Anspruch 7 oder 8,
dadurch gekennzeichnet, dass die Bremseinrichtung (5) mindestens ein hydraulisch betätigtes Bremselement (7) umfaßt. - Walzwerk nach einem der Ansprüche 7 bis 11,
dadurch gekennzeichnet, dass im Auslaufbereich (4) für das fertige Rohr (1) Mittel (10) zum Auslenken des Rohrs (1) senkrecht zur Förderrichtung (R) des Rohres (1) angeordnet sind. - Walzwerk nach Anspruch 13,
dadurch gekennzeichnet, dass die Mittel (10) zum Auslenken des Rohrs (1) zwischen Walzgerüst (2) und Bremseinrichtung (5) angeordnet sind. - Walzwerk nach Anspruch 13 oder 14,
dadurch gekennzeichnet, dass die seitlichen Begrenzungsflächen (11) der Mittel (10) zum Auslenken senkrecht zur Förderrichtung (R) des Rohres (1) verfahrbar angeordnet sind. - Walzwerk nach einem der Ansprüche 13 bis 15,
dadurch gekennzeichnet, dass die Mittel (10) zum Auslenken des Rohrs (1) so ausgebildet sind, dass sie zumindest einen S-förmigen Förderabschnitt (12) im Auslaufbereich (4) bilden. - Walzwerk nach Anspruch 16,
dadurch gekennzeichnet, dass die Mittel (10) zum Auslenken mindestens zwei im wesentlichen kreisbogenförmige Abschnitte (13) aufweisen, die den Auslaufbereich (4) seitlich begrenzen. - Walzwerk nach einem der Ansprüche 13 bis 17,
dadurch gekennzeichnet, dass die Mittel (10) zum Auslenken zumindest während des Kaltpilgerprozesses des Rohres (1) eine Förderrinne für das fertige Rohr (1) bilden, die das Rohr (1) zumindest geringfügig von der ideal geraden Form seitlich ablenkt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10144887A DE10144887C1 (de) | 2001-09-12 | 2001-09-12 | Verfahren zum Betreiben eines Kaltpilgerwalzwerks und Kaltpilgerwalzwerk |
| DE10144887 | 2001-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1293268A1 true EP1293268A1 (de) | 2003-03-19 |
| EP1293268B1 EP1293268B1 (de) | 2005-01-19 |
Family
ID=7698752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02016148A Expired - Lifetime EP1293268B1 (de) | 2001-09-12 | 2002-07-20 | Verfahren zum Betreiben eines Kaltpilgerwalzwerks und Kaltpilgerwalzwerk |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1293268B1 (de) |
| AT (1) | ATE287298T1 (de) |
| DE (2) | DE10144887C1 (de) |
| ES (1) | ES2236403T3 (de) |
| PL (1) | PL355987A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218308A (ja) * | 1982-06-12 | 1983-12-19 | Sumitomo Metal Ind Ltd | ピルガ−ミル |
| JPS6384704A (ja) * | 1986-09-29 | 1988-04-15 | Manabu Kiuchi | コ−ルドピルガ−圧延方法及び装置 |
| EP0659494A2 (de) * | 1993-12-27 | 1995-06-28 | MANNESMANN Aktiengesellschaft | Vorrichtung zum Abführen von kaltgewalzten Rohren hinter einem Kaltpilgerwalzwerk |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2652267A1 (de) * | 1976-11-12 | 1978-05-18 | Mannesmann Ag | Verfahren zur herstellung von rohren grosser laenge durch schrittweises kaltwalzen |
| DE3146284C2 (de) * | 1981-11-19 | 1985-10-31 | Mannesmann AG, 4000 Düsseldorf | Verfahren zum Abführen von kaltgewalzten Rohren, insbesondere großer Längen |
-
2001
- 2001-09-12 DE DE10144887A patent/DE10144887C1/de not_active Expired - Fee Related
-
2002
- 2002-07-20 AT AT02016148T patent/ATE287298T1/de not_active IP Right Cessation
- 2002-07-20 ES ES02016148T patent/ES2236403T3/es not_active Expired - Lifetime
- 2002-07-20 EP EP02016148A patent/EP1293268B1/de not_active Expired - Lifetime
- 2002-07-20 DE DE50202033T patent/DE50202033D1/de not_active Expired - Fee Related
- 2002-09-11 PL PL02355987A patent/PL355987A1/xx not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218308A (ja) * | 1982-06-12 | 1983-12-19 | Sumitomo Metal Ind Ltd | ピルガ−ミル |
| JPS6384704A (ja) * | 1986-09-29 | 1988-04-15 | Manabu Kiuchi | コ−ルドピルガ−圧延方法及び装置 |
| EP0659494A2 (de) * | 1993-12-27 | 1995-06-28 | MANNESMANN Aktiengesellschaft | Vorrichtung zum Abführen von kaltgewalzten Rohren hinter einem Kaltpilgerwalzwerk |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 008, no. 073 (M - 287) 5 April 1984 (1984-04-05) * |
| PATENT ABSTRACTS OF JAPAN vol. 012, no. 311 (M - 734) 24 August 1988 (1988-08-24) * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2236403T3 (es) | 2005-07-16 |
| EP1293268B1 (de) | 2005-01-19 |
| ATE287298T1 (de) | 2005-02-15 |
| DE10144887C1 (de) | 2003-04-24 |
| DE50202033D1 (de) | 2005-02-24 |
| PL355987A1 (en) | 2003-03-24 |
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