EP1203622A2 - Drehantrieb von reziprok abwälzbaren Walzenkalibern eines Kaltpilgerwalzwerkes - Google Patents
Drehantrieb von reziprok abwälzbaren Walzenkalibern eines Kaltpilgerwalzwerkes Download PDFInfo
- Publication number
- EP1203622A2 EP1203622A2 EP01122065A EP01122065A EP1203622A2 EP 1203622 A2 EP1203622 A2 EP 1203622A2 EP 01122065 A EP01122065 A EP 01122065A EP 01122065 A EP01122065 A EP 01122065A EP 1203622 A2 EP1203622 A2 EP 1203622A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- roll
- pinions
- cold pilger
- roller
- 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.)
- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 58
- 230000007935 neutral effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 16
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000012886 Vertigo Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007704 transition Effects 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
- B21B21/06—Devices for revolving work between the steps
-
- 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 for adapting the rolling curve of the drive pinion from ring rollers to the neutral zone in the tapered caliber of Ring rolling of a cold pilger rolling mill.
- Cold pilger rolling mills are suitable, extruded, hot-rolled or continuously cast, thick-walled metal slugs, especially copper slugs, in one operation with a comparatively large extension to long, thin-walled as well reduce ductile pipes with low eccentricity.
- the cold pilger process used is a forming rolling process for metal pipes, in which in a large number of forming steps Diameter and wall thickness can be reduced.
- the rolling mandrel is attached to a long mandrel bar, which is clamped and held by a mandrel abutment.
- a pair of rollers rolls back and forth over the one on the mandrel tubular rolling stock and stretching it, similar to a rolling pin when rolling out and Stretching dough.
- the pair of rollers is in a reciprocating reciprocating roll stand stored and is connected by pinions connected to it with two fixed Combing racks, driven during the scaffolding movement.
- the roll Roll caliber back and forth in synchronism with the oscillating roll stand.
- the rolling stand itself is moved like a motor piston by a crank mechanism moved here.
- the roller calibers are approximately circular and shrink in the usual execution according to the state of the art over the circumference of the roller.
- the decreasing or tapering cross section between rollers and Rolling mandrel simultaneously reduces the diameter and wall thickness of the rolling stock.
- the rollers briefly release the blank, which is advanced and / or rotated at the same time, for example by approximately 60 ° in each case.
- both the forward and the return stroke are used for the forming.
- the feed and angle of rotation in both dead centers depend on the pipe material and quality requirements.
- the deformation resistance of rolled pipes ranges from 400 N / mm 2 to over 1,500 N / mm 2 for special alloys.
- FIG. 2a shows a reduction in the forward stroke.
- Figure 2b shows in section A-B an exit cross section.
- Figure 2c shows a reduction in the return stroke and
- Figure 2d shows in section A-B an outlet cross section.
- the object of the invention based on a method for driving the roller pair of a cold pilger rolling mill to indicate which is a significantly improved adjustment of the rolling curve of the pinion to the neutral zone in the tapered caliber of the ring rollers realized.
- An embodiment of the invention consists in that for driving the pinion and so that the ring rolling - corresponding sinusoidal racks are used.
- This solution according to the invention reduces or avoids the disadvantages of unsatisfactory methods and devices from the prior art, e.g. the sliding of the pair of rollers on the rolling stock with those described above Disadvantages for the rolled product and the rolling mill, or the reduced Production output.
- FIGS. 2a to 2d A cold crawl process known as such is shown in FIGS. 2a to 2d shown. It is used to manufacture or form a tube 12 by means of a pair of cold pilger rolls 10, 10 ', which is in a roll stand, not shown is stored.
- the pipe 12 to be machined is guided on a rolling mandrel 13.
- the Rolling stand makes an oscillating movement during the rolling process, stroke frequencies of up to 300 per minute and more are possible.
- the pipe 12 is brought into its finished shape or final contour by rolling calibres 11, 11 '; the rolling calibers 11, 11 'are in each other over the entire outer circumference opposite rollers 10 and 10 'cut and close in Roll gap (see FIGS. 2b and 2d) encloses the tube 12 circumferentially.
- the Rolling calibers 11 and 11 ' have a different one according to their calibration Width and / or depth - in processing over the circumference of the roller seen- what with the hatched roller caliber contours 11 and 11 'in the figures 2a or 2c is indicated.
- the tube 12 is moved in the conveying direction R during rolling. While The forward stroke, which is schematically sketched in FIG. 2a, rolls the complementary one Cold pilger roller pair 10 and 10 'in the conveying direction R on the tube 12, which in Roll gap is enclosed by the roll calibers 11 and 11 '. During the return stroke, that is schematically outlined in FIG. 2c, the roll pair is unrolled 10 and 10 'on the tube 12 against the conveying direction R (cf. in the Figures the arrows for the direction of rotation 14 and direction of translation 15).
- Curve 5 shows the neutral fiber, in which the longitudinal forces result from the different Neutralize transmission speeds.
- the rolling stock share between the caliber base and the neutral fiber is relative lower speed, the proportion between roller diameter 6 and neutral Fiber 5 rolled over at a higher speed.
- a pinion pitch circle which could follow curve 5, would also neutralize the longitudinal forces that result from the rolling ratios that change over the caliber length.
- a round, centrally arranged pinion 7 can only imperfectly approach these requirements. Because: The proportion of the circumferential speed that is too high predominates in the front caliber area, but is too low in the smoothing area of the smoothing zone 3. The conditions are only temporarily correct when the roll is unrolled at approx. 120 °.
- the pinion is arranged eccentrically in a suitable manner according to the invention (8), it becomes an extremely extensive approximation to the desired curve 5 reached and the movement tendencies of the rolling stock are largely neutralized.
- the roller circumference can be used without restriction and the curve follows the target curve much better than is possible in the prior art is.
Abstract
Description
- er ergibt fallweise relativ große Querschnittsreduktionen von Durchmesser und Wanddicke, und eine
- erhebliche Verminderung der Exzentrizität infolge ausgleichenden Fließens in Umfangsrichtung, sowie eine
- Optimierung des Werkstoffgefüges infolge mechanischer Vergütung, bei
- Herstellung großer Rohrlängen.
- Erzielung enger Toleranzen für Durchmesser und Wanddicke beim Walzgut,
- kein prozeßbedingter Materialverlust,
- Anwendbarkeit auch für schwer umformbare Werkstoffe, mit
- hoher Wirtschaftlichkeit durch Einsatz großer Luppengewichte und -längen, sowie
- Herstellung unterschiedlicher Fertigproduktabmessungen aus einer Luppenabmessung.
- Verminderung der Druckbelastung an den Vorschubschlitten,
- Vermeidung eines unkontrollierten Vorschubs durch Relativbewegungen zwischen Walzenprofil und Walzgut,
- Verschleißminderung im Walzenprofil,
- Reduktion des Energieverbrauchs durch verminderte Reibleistung,
- Anpassung der Abwälzkurve des Ritzels an die neutrale Zone im sich verjüngenden Kaliber der Ringwalzen,
- Vermeidung der noch bestehenden Nachteile vorbekannter Lösungen.
- Walzendurchmesser
- Ritzelteilkreis
- Exzentrizität
- Winkellage der Exzentrizität zum Einlauftotpunkt des Walzgerüstes.
- Figur 1
- im Diagramm die geometrischen Verhältnisse über der Hublänge eines Kaltpilgerwalzwerkes
- Figur 2 a bis 2 d
- ein Walzverfahren nach der Erfindung mit den Arbeitsschritten:
- Figur 2a
- eine Reduktion beim Vorhub mit exzentrisch angeordneten Ritzeln
- Figur 2b
- im Schnitt A-B einen Austrittsquerschnitt
- Figur 2c
- eine Reduktion beim Rückhub
- Figur 2d
- im Schnitt A-B einen Austrittsquerschnitt
Kupferwalzung | 87 x 11 auf 40 x 2 |
Walzendurchmesser | 375 mm |
Ritzelteilkreis | 336 mm |
Hub des Gerüstes | 1.023 mm |
Reduzierkaliberlänge | 600 mm |
Glättkaliberlänge | 140 mm |
Ritzelexzentrizität | 13 mm |
Winkelversatz | 140 Grad |
- aus der Zone 1, in der die Walzen das Walzgut zum Vorschieben und Drehen freigeben,
- aus der Reduktionszone 2, die einer Parabelfunktion folgt,
- aus der zylindrischen Glättzone 3,
- aus dem Übergang 4, in dem das Walzgut zusätzlich gedreht und/oder vorgeschoben werden kann.
Im vorderen Kaliberbereich überwiegt der Anteil der zu großen Umfangsgeschwindigkeit, dagegen ist sie im Glättbereich der Glättzone 3 zu gering. Nur bei ca. 120° Walzenabwicklung sind die Verhältnisse vorübergehend korrekt.
Claims (3)
- Verfahren zur Anpassung der Abwälzkurve der Antriebsritzel von Ringwalzen an die neutrale Zone im sich verjüngenden Kaliber der Ringwalzen eines Kaltpilgerwalzwerkes, indem hierfür kreisrunde Ritzel verwendet und diese auf der Walzenachse exzentrisch angeordnet und befestigt werden.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass zum Antrieb der Ritzel - und damit der Ringwalzen - entsprechend sinusförmige Zahnstangen verwendet werden. - Verfahren nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass bei der Verwendung von kreisrunden exzentrischen Ritzeln, die mit entsprechend sinusförmigen Zahnstangen kämmen, die folgenden vier Parameter an die aktuelle Walzabmessung anpaßbar sind:WalzendurchmesserRitzelteilkreisExzentrizitätWinkellage der Exzentrizität zum Einlauftotpunkt des Walzgerüstes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10054268 | 2000-11-02 | ||
DE10054268A DE10054268A1 (de) | 2000-11-02 | 2000-11-02 | Drehantrieb von reziprok abwälzbaren Walzenkalibern eines Kaltpilgerwalzwerkes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1203622A2 true EP1203622A2 (de) | 2002-05-08 |
EP1203622A3 EP1203622A3 (de) | 2004-12-22 |
Family
ID=7661869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01122065A Withdrawn EP1203622A3 (de) | 2000-11-02 | 2001-09-14 | Drehantrieb von reziprok abwälzbaren Walzenkalibern eines Kaltpilgerwalzwerkes |
Country Status (7)
Country | Link |
---|---|
US (1) | US20020121119A1 (de) |
EP (1) | EP1203622A3 (de) |
JP (1) | JP2002153903A (de) |
KR (1) | KR20020034859A (de) |
CN (1) | CN1351909A (de) |
DE (1) | DE10054268A1 (de) |
RU (1) | RU2001129641A (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7922065B2 (en) | 2004-08-02 | 2011-04-12 | Ati Properties, Inc. | Corrosion resistant fluid conducting parts, methods of making corrosion resistant fluid conducting parts and equipment and parts replacement methods utilizing corrosion resistant fluid conducting parts |
US8479549B1 (en) * | 2009-08-17 | 2013-07-09 | Dynamic Flowform Corp. | Method of producing cold-worked centrifugal cast tubular products |
US9574684B1 (en) | 2009-08-17 | 2017-02-21 | Ati Properties Llc | Method for producing cold-worked centrifugal cast composite tubular products |
US9375771B2 (en) | 2009-08-17 | 2016-06-28 | Ati Properties, Inc. | Method of producing cold-worked centrifugal cast tubular products |
US10118259B1 (en) | 2012-12-11 | 2018-11-06 | Ati Properties Llc | Corrosion resistant bimetallic tube manufactured by a two-step process |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU175912A1 (de) * | вителиВсесоюзный научно исследовательский трубный институт | |||
US1980186A (en) * | 1931-02-19 | 1934-11-13 | American Brass Co | Tube reducing means |
DE1752996A1 (de) * | 1968-08-19 | 1971-07-29 | Vni I P Metall Mash | Arbeitswalzenantrieb fuer Rohrkaltwalzwerk |
DE19804162A1 (de) * | 1998-02-03 | 1999-12-23 | Walter Wolf | Verfahren zum Walzen von Rohren oder Stangen im Kaltpilger- oder Kaltpilgerschrittverfahren |
-
2000
- 2000-11-02 DE DE10054268A patent/DE10054268A1/de not_active Withdrawn
-
2001
- 2001-09-11 KR KR1020010055719A patent/KR20020034859A/ko not_active Application Discontinuation
- 2001-09-14 EP EP01122065A patent/EP1203622A3/de not_active Withdrawn
- 2001-09-27 JP JP2001296911A patent/JP2002153903A/ja active Pending
- 2001-11-01 US US10/000,842 patent/US20020121119A1/en not_active Abandoned
- 2001-11-01 RU RU2001129641/02A patent/RU2001129641A/ru not_active Application Discontinuation
- 2001-11-02 CN CN01137286A patent/CN1351909A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU175912A1 (de) * | вителиВсесоюзный научно исследовательский трубный институт | |||
US1980186A (en) * | 1931-02-19 | 1934-11-13 | American Brass Co | Tube reducing means |
DE1752996A1 (de) * | 1968-08-19 | 1971-07-29 | Vni I P Metall Mash | Arbeitswalzenantrieb fuer Rohrkaltwalzwerk |
DE19804162A1 (de) * | 1998-02-03 | 1999-12-23 | Walter Wolf | Verfahren zum Walzen von Rohren oder Stangen im Kaltpilger- oder Kaltpilgerschrittverfahren |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED, SECTION CH: CHEMICAL., Juni 1966 (1966-06), XP002301497 DERWENT PUBLICATIONS LTD.,LONDON., GB * |
Also Published As
Publication number | Publication date |
---|---|
CN1351909A (zh) | 2002-06-05 |
EP1203622A3 (de) | 2004-12-22 |
RU2001129641A (ru) | 2003-09-27 |
JP2002153903A (ja) | 2002-05-28 |
US20020121119A1 (en) | 2002-09-05 |
DE10054268A1 (de) | 2002-05-08 |
KR20020034859A (ko) | 2002-05-09 |
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