EP0908245A1 - Verfahren und Vorrichtung zur Herstellung von Rohren nach dem Kaltpilgerschrittverfahren - Google Patents
Verfahren und Vorrichtung zur Herstellung von Rohren nach dem Kaltpilgerschrittverfahren Download PDFInfo
- Publication number
- EP0908245A1 EP0908245A1 EP98250040A EP98250040A EP0908245A1 EP 0908245 A1 EP0908245 A1 EP 0908245A1 EP 98250040 A EP98250040 A EP 98250040A EP 98250040 A EP98250040 A EP 98250040A EP 0908245 A1 EP0908245 A1 EP 0908245A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- stand
- roll
- roll stand
- crank
- 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
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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
Definitions
- the invention relates to a method and a device for producing pipes, preferably made of high-strength steels or special alloys according to Cold pilger step method with two at least in the rolling direction by means of crank drives At times counter-rotating roll stands with tapering calibrated rollers, driven by racks via pinions, with alternating Roll the direction of rotation over the rolling stock.
- crank drives shows roll stands that can be reciprocated at times in opposite directions, the rollers of which roll over Racks are driven with alternating directions of rotation.
- the well-known The arrangement provides for the blank in the first roll stand exclusively and without Reduce the diameter of the dome and then the wall thickness in the second roll stand reduce the pipe over a mandrel.
- the arrangement of the crank drives is like this chosen that the movements of the two rolling stands together with the Movement of the mandrel bar and gripping of the rollers feed the tube enable in a certain way.
- the object of the present invention is a cold pilger rolling process and Device for the production of pipes, in particular from high-strength steels or To create special alloys according to the cold pilger step process, in which a significant increase in rolling performance compared to conventional rolling mills with the least possible additional mechanical effort and without loss of quality becomes possible.
- a method is proposed which is characterized in that on the first roll stand the majority and on the second roll stand a smaller part of the forming work and additional Smoothing work is done that in both rolling stands on the one Roll caliber adapted mandrel is rolled reducing and that the Angular offset of the crank drives is chosen so that the forming zone of the first The framework does not coincide with the forming zone of the second framework.
- the method according to the invention enables extremely high performance firstly, that in the first roll stand only forming work and none Smoothing is done, which significantly extends the Reduction caliber is usable and no performance reducing Tolerance requirements have to be taken into account while in the second mill stand beside the smoothing work is carried out a significant additional forming work.
- the choice of the phase angle between the two stands and the design of the Rolling tools are subject to significantly fewer restrictions if the rolls of the release the tube at a second definable time by separately an annular gap is temporarily formed between the tube and the roller.
- the second roll stand is increased by approximately 180 Degrees crank angle offset to the first scaffolding and on which Reduction-free return stroke from the material range from the first frame Appropriate annular gap between rolling stock and roll caliber in which the formed tube is inserted in the first roll stand.
- This method is advantageously implemented in that at least the rollers of the second roll stand are cyclically adjustable in angle during rolling.
- the Adjustment of the rollers can, according to the invention, by horizontal displacement of the Racks take place, whereby the engagement of the roll caliber relative to the rolling stock is changed.
- a device for performing the method is characterized in that the first roll stand as a break-down stand with only working calibers having rollers is formed that the rollers of the second roll stand Working and smoothing calibers have that the rolls of both roll stands with correspondingly calibrated rolling mandrels interact, and that the each other offset crank drives to drive the roll stands above each roll stand assigned individual push rods with vertical axes of rotation are, wherein the two cranks have opposite directions of rotation.
- crank drive angle allows rotation and advancing the slug at favorable times and prevents together with further features of the invention that there is a material jam between the Roll stands comes while the main forming work is on the first roll stand is performed.
- the opposite direction of rotation of the two cranks allows one favorable balance of mass forces of the first harmonics, making it high Strokes possible compared to a conventional single cold pilger rolling mill do not have to be reduced because the inertia forces due to the chosen construction do not rise.
- crank mechanism The mechanical engineering effort for such a crank mechanism is only insignificant higher than for driving a single scaffold.
- the arrangement of the crank drives with vertical axes of rotation dispenses with deep foundations for the Mass balance.
- the distance between the two roll stands can be e.g. are minimized if according to a further feature of the invention Push rods of each roll stand in superimposed levels or the two roll stands are arranged above the crank mechanism in such a way that the pivot points for the push rods on the two are furthest apart distant parts of the roll stand.
- a common crank mechanism with rotating counterweights on the two opposing crank bends is preferably provided for both roll stands, which counterbalances the first order of the inertial forces, while an at least partial compensation of the inertial forces can take place through the interaction of the stand masses.
- a phase angle of 90 ° is optimal from the point of view of the balancing of mass forces, because under this condition the second order mass forces also cancel each other out.
- difficulties in rolling technology cannot be ruled out with such an arrangement.
- the cranks are driven in the same direction of rotation and, with counterweights on the cranks, some of the mass forces of the first order are balanced. The remaining portion of this mass force component is not compensated at all or with counterweights on an intermediate shaft connecting the two cranks via gear wheels, which rotates at the crank speed but in the opposite direction.
- the drive of the second roll stand then can preferably be made weaker than that of the first roll stand. This makes the drive of the second scaffolding smaller, lighter and cheaper than that of the first roll stand. A change in the phase angle between the two Scaffolding is easy to implement with two separate crank drives.
- the two roll stands in one housing to accommodate driving cranks, but to drive them by separate motors, so that the change in the phase angle of the two cranks is easily possible.
- the first order mass balance then requires two rotating weights each crank, such that the greater weight is firmly connected to the crank and the smaller one in relation to the crank e.g. than rotatable around the middle of the crank Eccentric is adjustable.
- At least the rollers are excited to adjust the center distance to provide a cyclically usable wedge mechanism of the second roll stand.
- Cold pilgrims of thin-walled tubes with small diameters can be used with any e.g. also possible with non-incremental rotary and feed movements.
- This thin-walled tube becomes use of a rolling mill according to the invention completed by the second mill stand. Because the pipe in this case is the second Roll stand can be fed in any way, the turning and Feed movement independent of the phase position of the two roll stands can only be determined according to the requirements of the first rolling stand, e.g. also as turning and advancing in both dead centers. With these thin-walled products, the cold vocational process also allows Turning and advancing the tube, even though the rollers roll the tube on the Touch the smooth caliber. It follows that the caliber of the rollers of the second roll stand also extended to the dead center of this roll stand can be.
- the invention combines a number of advantages over the prior art. Since the mechanical engineering effort for the rotary and feed drive as well as for the Loaded with new slugs compared to a normal single cold pilger rolling mill is not increased, the rolling mill can be manufactured with a good price-performance ratio become.
- the rolling mill can be operated with high stroke rates compared to a normal single rolling mill does not have to be reduced because the Mass forces do not increase due to the scaffolding and crank mechanism arrangement.
- the mechanical engineering effort for the crank drive is only slightly higher than that for the drive of just one scaffold.
- the Caliber length of the first stand can be fully used for the forming, since a smoothing caliber is not required here and tolerance requirements are not taken into account can stay.
- the two roll stands 1 and 2 are so by a common crank mechanism 3 driven that the mass forces of the first order of the two roll stands completely compensate.
- the counter-rotating counterweights 4 and 5 (FIG. 2) only the rotary ones are the same in this exemplary embodiment Imbalance from cranks and push rods.
- Each roll stand 1 and 2 is only by one of the push rods 11 and 12th driven, which move in superimposed levels. This will thereby causes the articulation point to the first roll stand 1 under the same and to the second roll stand 2 is provided in front of this. Enter ET in the dead center both sets of rolls 7 and 8 free the rolling stock for turning and advancing The rolling outlet dead center AT is at most short for an additional turning Approved.
- the illustrated rolling mill according to the invention which is about twice the performance of a conventional rolling mill, is characterized in that the entire turning, Feed and loading device remains unchanged that the oscillating Compensating masses of a conventional rolling mill with a second rolling stand are replaced, and that only the additional roller axes with their Rack and pinion drives are added.
- Example 1 describes a classic stainless steel rolling for heat exchanger tubes
- Example 2 explains the exploitation of the great ductility of austenitic steels for one greater cross-sectional reduction.
- the 5.6 mm advance in the first stand occurs when the 1st stand is in the Infeed and the 2nd scaffold are in the dead center; d. H. the forming in the 1st Scaffolding essentially takes place on its forward stroke when the 2nd scaffolding is on the Return stroke is located. The latter will be in its exit dead center area Feed volume 20 x 1.5 with 5.6 mm length added, which during its Return stroke extended to 20.7 mm.
- the second scaffold is given before it begins Vorhubes fed a feed of 20.7 mrn, which at 1.85 times the stretch in 2. Roll out the stand to 38 mm.
- Example 2 shows the rolling 33 x 3.5 to 16 x 1 for the conventional rolling mill from “Example 1", however for the rolling mill according to the invention 33 x 3.5 to 12 x 1. Even here, the output in m / h and the throughput in kg / h are doubled increases by almost 50% despite the lower meter weight.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Laminated Bodies (AREA)
Abstract
Description
In einer baulichen Varianten werden die Kurbeln in gleichem Drehsinn angetrieben und mit Gegengewichten an den Kurbeln jeweils ein Teil der Massenkräfte erster Ordnung ausgeglichen. Der verbleibende Anteil dieser Massenkraftkomponente wird garnicht oder mit Gegengewichten an einer die beiden Kurbeln über Zahnräder verbindenden Zwischenwelle, die mit Kurbeldrehzahl aber in entgegengesetztem Drehsinn umläuft, ausgeglichen.
- Figur 1
- eine grob schematische Seitenansicht eines erfindungsgemäßen Walzwerkes,
- Figur 2
- eine Draufsicht auf das Walzwerk nach Figur 1 und
- Figur 3
- eine tabellarische Gegenüberstellung zweier Ausführungsbeispiele
Claims (12)
- Verfahren zur Herstellung von Rohren, vorzugsweise aus hochfesten Stählen oder Sonderlegierungen nach dem Kaltpilgerschrittverfahren mit zwei in Walzrichtung mittels Kurbeltrieben mindestens zeitweise gegenläufig hin- und herbewegbaren Walzgerüsten mit verjüngend kalibrierten Walzen, die von Zahnstangen über Ritzel angetrieben, mit wechselndem Drehsinn über dem Walzgut abrollen,
dadurch gekennzeichnet
daß auf dem ersten Walzgerüst der überwiegende Teil und auf dem zweiten Walzgerüst ein geringerer Teil der Umformarbeit und zusätzliche Glättarbeit geleistet werden, daß in beiden Walzgerüsten über einen dem Walzenkaliber angepaßten Dom reduzierend gewalzt wird und daß der Winkelversatz der Kurbeltriebe so gewählt ist, daß die Umformzone des ersten Gerüstes zeitlich nicht mit der Umformzone des zweiten Gerüstes zusammenfällt. - Verfahren zur Herstellung von Rohren nach Anspruch 1,
dadurch gekennzeichnet,
daß das zweite Walzgerüst um ca. 180 Grad Kurbelwinkel versetzt zum ersten Gerüst angeordnet ist und auf dem reduktionsfreien Rückhub einen dem Materialangebot aus dem ersten Gerüst entsprechenden Ringspalt zwischen Walzgut und Walzenkaliber freigibt, in den das im ersten Walzgerüst umgeformte Rohr eingeführt wird. - Verfahren zur Herstellung von Rohren nach Anspruch 1 und 2,
dadurch gekennzeichnet,
daß die Zahnstangen zum rotatorischen Antrieb der Walzen zyklisch horizontal verschiebbar sind. - Verfahren zur Herstellung von Rohren nach Anspruch 1 und 3,
dadurch gekennzeichnet,
daß der Achsabstand der Walzen während des Walzprozesses zyklisch verändert wird. - Verfahren zur Herstellung von Rohren nach Anspruch 1,
dadurch gekennzeichnet,
daß das zweite Walzgerüst um ca. 90 bis 150 Grad Kurbelwinkel zum ersten Walzgerüst versetzt angeordnet ist und daß seine Walzen rotatorisch durch ortsfeste Zahnstangen angetrieben werden und daß der Achsabstand der Walzen während des Walzens konstant bleibt. - Vorrichtung zur Herstellung von Rohren, vorzugsweise aus hochfesten Stählen oder Sonderlegierungen nach dem Kaltpilgerschrittverfahren mit zwei in Walzrichtung mittel Kurbeltrieben mindestens zeitweise gegenläufig in einer Führung hin- und herbewegbaren Walzgerüsten mit verjüngend kalibrierten Walzen, die von Zahnstangen über Ritzel angetrieben, mit wechselndem Drehsinn über dem Walzgut abrollen,
dadurch gekennzeichnet,
daß das erste Walzgerüst (1) als Break-Down-Gerüst mit ausschließlich Arbeitskaliber aufweisenden Walzen (7) ausgebildet ist, daß die Walzen (8) des zweiten Walzgerüstes (2) Arbeits- und Glättkaliber aufweisen, daß die Walzen (7,8) beider Walzgerüste (1,2) mit entsprechend kalibrierten Walzdornen zusammenwirken und daß die zueinander winkelversetzten Kurbeltriebe (3) zum Antrieb der Walzgerüste (1,2) über jedem Walzgerüst (1,2) zugeordnete einzelne Schubstangen (11,12) mit senkrechten Drehachsen ausgeführt sind. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6,
dadurch gekennzeichnet,
daß die Schubstangen (11, 12) jedes Walzgerüstes (1,2) in übereinanderliegenden Ebenen umlaufen. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6 und 7,
dadurch gekennzeichnet,
daß für beide Walzgerüste (1,2) ein gemeinsamer Kurbeltrieb (3) mit gegenläufigen Kurbeln und rotierenden Ausgleichsgewichten (4,5) an den beiden Kurbelkröpfungen vorgesehen wird, wobei die rotierenden Gegengewichte die Massenkräfte erster Ordnung vollständig ausgleichen und ein teilweiser Ausgleich der Massenkräfte höherer Ordnung durch das Zusammenspiel der Gerüstmassen erfolgt. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6 und 7
dadurch gekennzeichnet,
daß die Kurbeln in gleichem Drehsinn angetrieben und mit Gegengewichten an den Kurbeln jeweils ein Teil der Massenkräfte erster Ordnung ausgeglichen werden und der verbleibende Anteil dieser Massenkraftkomponente gar nicht oder mit Gegengewichten an einer die beiden Kurbeln über Zahnräder verbindenden Zwischenwelle, die mit Kurbeldrehzahl aber in entgegengesetztem Drehsinn umläuft, ausgeglichen wird. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6,
dadurch gekennzeichnet,
daß jedem Walzgerüste (1 und 2) ein eigener Kurbeltrieb mit Massenausgleich zugeordnet ist, wobei der Antrieb des zweiten Walzgerüstes (2) vorzugsweise schwächer als der des ersten Walzgerüstes (1) ausgebildet ist. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6,
dadurch gekennzeichnet,
daß mindestens die Zahnstangen (10) des zweiten Walzgerüstes (2) mit einer Verschiebeeinrichtung (9) zur Verstellung der Zahnstangen (10) in deren Längserstreckungsrichtungen versehen sind. - Vorrichtung zur Herstellung von Rohren nach Anspruch 6,
dadurch gekennzeichnet,
daß zur Verstellung des Achsabstandes mindestens der Walzen (7,8) des zweiten Walzgerüstes (2) ein zyklisch einstellbarer Keilmechanismus vorgesehen ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19745603 | 1997-10-08 | ||
DE19745603 | 1997-10-08 | ||
DE19750787 | 1997-11-06 | ||
DE19750787A DE19750787C1 (de) | 1997-10-08 | 1997-11-06 | Verfahren und Vorrichtung zur Herstellung von Rohren nach dem Kaltpilgerschrittverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0908245A1 true EP0908245A1 (de) | 1999-04-14 |
EP0908245B1 EP0908245B1 (de) | 2002-05-15 |
Family
ID=26040860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98250040A Expired - Lifetime EP0908245B1 (de) | 1997-10-08 | 1998-02-02 | Verfahren und Vorrichtung zur Herstellung von Rohren nach dem Kaltpilgerschrittverfahren |
Country Status (6)
Country | Link |
---|---|
US (1) | US5916320A (de) |
EP (1) | EP0908245B1 (de) |
AT (1) | ATE217550T1 (de) |
CA (1) | CA2234218C (de) |
ES (1) | ES2173546T3 (de) |
RU (1) | RU2205075C2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10241612B3 (de) * | 2002-09-07 | 2004-01-08 | Sms Meer Gmbh | Antriebssystem für ein Kaltpilgerwalzwerk |
US6997026B2 (en) * | 2002-12-12 | 2006-02-14 | Engel Industries, Inc. | Quick change metal stud to hemmed track roll forming system |
JP5276168B2 (ja) * | 2008-08-01 | 2013-08-28 | ヴァヴィット エッセ エッレ エッレ | 一定の長さに管の外形を加工する方法 |
DE102009007465B3 (de) * | 2009-02-04 | 2010-09-30 | Sms Meer Gmbh | Antriebssystem für ein Walzwerk, insbesondere für ein Kaltpilgerwalzwerk |
DE102011004203A1 (de) * | 2011-02-16 | 2012-08-16 | Sandvik Materials Technology Deutschland Gmbh | Vorrichtung mit einer Mehrzahl von Kaltwalzanlagen |
DE102016106034A1 (de) * | 2016-04-01 | 2017-10-05 | Sandvik Materials Technology Deutschland Gmbh | Kaltpilgerwalzanlage und Verfahren zum Herstellen eines Rohrs |
DE102016106035A1 (de) * | 2016-04-01 | 2017-10-05 | Sandvik Materials Technology Deutschland Gmbh | Kaltpilgerwalzanlage und Verfahren zum Herstellen eines Rohres |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE604909C (de) * | 1932-01-01 | 1934-11-02 | Hirsch | Verfahren zum Auswalzen von Rohren auf Pilgerschrittwalzwerken |
GB1261106A (en) * | 1968-04-09 | 1972-01-19 | Mannesmann Meer Ag | Cold pilger rolling mill |
DE2528850A1 (de) * | 1975-06-27 | 1977-01-13 | Pljazkovskij | Pilgerschrittwalzwerk zum rohrkaltwalzen |
US4052898A (en) * | 1976-09-13 | 1977-10-11 | Wean United, Inc. | Crank drive system for cold pilger mills drive or the like |
JPS63260607A (ja) * | 1987-04-16 | 1988-10-27 | Sumitomo Heavy Ind Ltd | ピルガ−式圧延機の慣性力バランス装置 |
EP0524711A2 (de) * | 1991-07-22 | 1993-01-27 | MANNESMANN Aktiengesellschaft | Kaltpilgerwalzwerk mit hin- und herbewegbarem Walzgerüst |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650138A (en) * | 1968-09-28 | 1972-03-21 | Giuseppe Persico | Multiple tube-rolling pilger mills |
SU505453A1 (ru) * | 1974-12-13 | 1976-03-05 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский И Конструкторско-Технологический Институт Трубной Промышленности | Инструмент роликового стана холодной прокатки труб |
JPS5412256A (en) * | 1977-06-28 | 1979-01-29 | Nippon Telegr & Teleph Corp <Ntt> | Detector for electron beam |
DE3010526A1 (de) * | 1980-03-17 | 1981-09-24 | Mannesmann AG, 4000 Düsseldorf | Pilgerschrittwalzwerk |
FR2530503A1 (fr) * | 1982-07-21 | 1984-01-27 | Vallourec | Procede de laminage a froid de tubes au moyen d'un laminoir a pas de pelerin et dispositif pour la mise en oeuvre du procede |
DE4234394C1 (de) * | 1992-10-07 | 1993-11-04 | Mannesmann Ag | Vorschubgetriebe fuer ein kaltpilgerwalzwerk |
US5351515A (en) * | 1993-01-19 | 1994-10-04 | Sandvik Special Metals Corporation | Apparatus and method for reducing the diameter of a cylindrical workpiece |
DE4336422C2 (de) * | 1993-10-20 | 1996-10-24 | Mannesmann Ag | Kurbeltrieb für ein Kaltpilgerwalzwerk |
-
1998
- 1998-02-02 AT AT98250040T patent/ATE217550T1/de active
- 1998-02-02 ES ES98250040T patent/ES2173546T3/es not_active Expired - Lifetime
- 1998-02-02 EP EP98250040A patent/EP0908245B1/de not_active Expired - Lifetime
- 1998-02-05 RU RU98103155/02A patent/RU2205075C2/ru not_active IP Right Cessation
- 1998-02-27 US US09/032,649 patent/US5916320A/en not_active Expired - Lifetime
- 1998-04-06 CA CA002234218A patent/CA2234218C/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE604909C (de) * | 1932-01-01 | 1934-11-02 | Hirsch | Verfahren zum Auswalzen von Rohren auf Pilgerschrittwalzwerken |
GB1261106A (en) * | 1968-04-09 | 1972-01-19 | Mannesmann Meer Ag | Cold pilger rolling mill |
DE2528850A1 (de) * | 1975-06-27 | 1977-01-13 | Pljazkovskij | Pilgerschrittwalzwerk zum rohrkaltwalzen |
US4052898A (en) * | 1976-09-13 | 1977-10-11 | Wean United, Inc. | Crank drive system for cold pilger mills drive or the like |
JPS63260607A (ja) * | 1987-04-16 | 1988-10-27 | Sumitomo Heavy Ind Ltd | ピルガ−式圧延機の慣性力バランス装置 |
EP0524711A2 (de) * | 1991-07-22 | 1993-01-27 | MANNESMANN Aktiengesellschaft | Kaltpilgerwalzwerk mit hin- und herbewegbarem Walzgerüst |
Also Published As
Publication number | Publication date |
---|---|
CA2234218C (en) | 2006-05-30 |
ES2173546T3 (es) | 2002-10-16 |
ATE217550T1 (de) | 2002-06-15 |
EP0908245B1 (de) | 2002-05-15 |
US5916320A (en) | 1999-06-29 |
CA2234218A1 (en) | 1999-04-08 |
RU2205075C2 (ru) | 2003-05-27 |
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