US3584489A - Rolling mill - Google Patents

Rolling mill Download PDF

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Publication number
US3584489A
US3584489A US785099A US3584489DA US3584489A US 3584489 A US3584489 A US 3584489A US 785099 A US785099 A US 785099A US 3584489D A US3584489D A US 3584489DA US 3584489 A US3584489 A US 3584489A
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US
United States
Prior art keywords
rolling mill
bearing block
rolls
rolling
crankshaft
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.)
Expired - Lifetime
Application number
US785099A
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English (en)
Inventor
Pierre Peytavin
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.)
Vallourec Usines a Tubes de Lorraine Escaut SA
Original Assignee
Vallourec Usines a Tubes de Lorraine Escaut SA
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.)
Filing date
Publication date
Application filed by Vallourec Usines a Tubes de Lorraine Escaut SA filed Critical Vallourec Usines a Tubes de Lorraine Escaut SA
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Publication of US3584489A publication Critical patent/US3584489A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B2035/005—Hydraulic drive motors

Definitions

  • the present invention relates to a rolling mill with a forming roll in which the moving masses are counterbalanced dynamically.
  • the rolling of the tubular blank takes place by locating in its interior a mandrel of generally conical shape and against which the wall of the blank is compressed.
  • An object of the present invention is to provide a simple means of obtaining a static and dynamic counterbalancing of all the moving parts in a rolling mill with stepped rolls.
  • a rolling mill comprising a bearing block supporting the rolls, and adapted to be subjected to a reciprocating movement, said bearing block being integrally'connected to a mobile mechanism comprising two eccentric masses, turning in opposite direction in synchronism with the reciprocatory displacements ofthe bearing block.
  • the eccentric masses which ensure the counterbalancing are rotated by at least one hydraulic motor, the rotor of which is directly coupled to them.
  • the aforesaid mobile mechanism comprises two identical crankshafts, each provided with eccentric masses which are mounted in the same frame and the rotary movements ofwhich are synchronized by gears of the same diameter provided on at least one of the extremities of the said crankshafts.
  • the crankshafts are each connected to the bearing block of the rolling mill by a connecting rod.
  • eccentric masses of the mobile mechanism are chosen in such a manner as to counterbalance the horizontal inertial developed by the bearing block of the rolling mill.
  • the shafts of the cranks which have been described above may be horizontal or vertical according to the desired general arrangement of the rolling mill.
  • FIG. I is a diagrammatic sectional view ofa pair of rolls of a rolling mill with forming rolls for tubes.
  • FIG. 2 is a diagrammatic side view of the pair of rolls shown in FIG. 1, the tube and its mandrel being cut in the plane of the axis of the rolls,
  • FIG. 3 is a diagrammatic, perspective view of an embodiment ofa rolling mill according to the invention.
  • FIG. 4 is a diagrammatic, perspective view of a variation of the counterbalancing device according to FIG. 3.
  • FIGS. 1 and 2 there are shown diagrammatically rolls 1 and 2 of the rolling mill which are provided with symmetrical grooves 3 and 4, the section of which varies along the periphery of the roll in such a manner as to effect rolling of a tubular blank 5 which is placed in a conventional manner on a central mandrel 6.
  • the rolls 1 and 2 are mounted in known manner, in order that their axes undergo a reciprocating motion between the points A and B, while the rolls, rotating about their axes, roll on the tubular blank 5. Between each reciprocating movement, that is between the moment when the axes of the rolls arrive at A and the moment when they leave it, there is imparted to the blank 5 a displacement in the direction of the arrow F in such a manner as to bring about the rolling ofa new section ofthe blank.
  • FIG. 1 the arrowsfshow the direction of longitudinal displacement and the direction of rotation of the rolls during the rolling motion.
  • FIG. 2 It can be seen from FIG. 2 how the grooves 3 and 4 effect the rolling of the blank 5 by pressing it against the mandrel 6.
  • the blank In order to obtain a perfectly circular section the blank is subject to periodic rotary movements about its longitudinal axis.
  • FIG. 3 shows diagrammatically a rolling mill according to the invention.
  • the rolls 1 and 2 mounted in a bearing block 7 which comprises in known manner guide means for reciprocating said bearing block in the direction indicated by the double arrow F,.
  • the bearing block 7 also comprises, in known manner, mechanisms for ensuring the rotational drive of the rolls 1 and 2 as well as the synchronization of the rotation of the rolls with the reciprocating motions of the bearing block.
  • a rod 6a which is provided at one end with the mandrel 6 is held firmly during a rolling operation by two rod supports 8 and 9 which permit the introduction of tubular blanks 5 on to the rod.
  • Tube holders [0 and II are also shown which are subjected to reciprocating movements as represented by the arrows to effect axial movement of the tubular blank 5. These tube holders 10 and II also have, in known manner, means for enabling the tubular blank 5 to be successively rotated as mentioned previously.
  • FIG. 3 There can also be seen in FIG. 3 a mobile mechanism which comprises an upper crank 12 and a lower crank 13. Shafts 14 and 15 of these two cranks are connected together for rotation by the toothed wheels 16 and 17 located at the ends of the shafts 14 and 15.
  • a crankpin 18 of the crank 12 is connected by a connecting rod 19 to a shaft 20 located on the upper part of the bearing block 7 and a crankpin 21 of the lower crank 13 is connected by a connecting rod 22 to a shaft 23 located on the lower part of the bearing block 7.
  • the mounting of the mobile mechanism is effected in such a way that the crankpins 18 and 21 of the cranks 12 and 13 are always arranged symmetrically in relation to the midplane of the two shafts 14 and 15 ofthe cranks.
  • counterweights 24 are fastened on the cranks 12 and 13 opposite the crankpins l8 and 21.
  • the masses of these counterweights 24 may be chosen (taking into account the weights of the other parts of the cranks 12 and 13) in order that, when there is a rotary movement of the cranks, the forces due to the accelerations to which these weights are subjected virtually counterbalance the forces to which the bearing block 7 and the parts which it supports are subjected.
  • the connecting rods 19 and 22 are also used for transmitting the oscillating motion to the bearing block 7 by means of a motor (not shown) which drives a shaft 25 on which pinions 26 mesh with the wheels 17.
  • FIG. 4 shows a variation of FIG. 3, in which the shafts l4 and 15 of the cranks are vertical instead of horizontal.
  • This embodiment of FIG. 4 may, in certain cases, have the advantage of making the rolled tube leaving the rolls more accessible.
  • the space in which the connecting rods 19 and 22 move can be shielded so that they do not constitute a danger to operators supervising the rolling mill.
  • the driving ofthe eccentric masses can be effected by means of a hydraulic motor, the rotor of which is directly connected with the shafts of the cranks.
  • a hydraulic motor the rotor of which is directly connected with the shafts of the cranks.
  • two hydraulic motors with the same features are used, one being coupled to the shaft 14 of the crank 12 and the other to the shaft 15 ofthe crank 13, and this is possible with either the embodiment of FIG. 3 or that of FIG. 4.
  • hydraulic motors having low speeds of rotation it is possible, due to the high power to weight ratio of these motors, to considerably reduce the moment of inertia of the masses coupled for rotation with the crankshafts l4 and 15.
  • the counterbalancing device used according to the invention makes it possible to provide rolling mills which can function without difficulty at high speed, for example at more than 200 strokes per minute.
  • this counterbalancing device allows considerable rolling runs which enables the provision of a sufficient period of tine for ensuring the movements of the blank between the rolling passes, whilst still increasing production.
  • a rolling mill comprising a bearing block mounting a pair of rolls, means for reciprocating said bearing block, said means comprising a drive means for producing rotary motion, transmission means for converting said rotary motion to reciprocating motion connecting said drive means to said bearing block, said transmission means comprising two crankshafts driven in opposite directions by said drive means, each crankshaft carrying an eccentric mass and being connected to a connecting rod, said connecting rod being in turn pivotally connected to said bearing block, whereby said bearing block and rolls are counterbalanced during their reciprocating motion.
  • each crankshaft is fixed to a toothed wheel, with the teeth of said wheels engaging each other to synchronize the movements of the two cranks.
  • Rolling mill as claimed in claim 1 comprising a hydraulic motor connected to drive said eccentric masses.
  • each crankshaft is driven by a hydraulic motor, the rotor of which is directly coupled thereto.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US785099A 1967-12-20 1968-12-19 Rolling mill Expired - Lifetime US3584489A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR133147 1967-12-20
AT47569A AT296924B (de) 1967-12-20 1969-01-16 Pilgerschrittwalzwerk mit dynamischer Auswuchtung der bewegten Massen

Publications (1)

Publication Number Publication Date
US3584489A true US3584489A (en) 1971-06-15

Family

ID=25592861

Family Applications (1)

Application Number Title Priority Date Filing Date
US785099A Expired - Lifetime US3584489A (en) 1967-12-20 1968-12-19 Rolling mill

Country Status (7)

Country Link
US (1) US3584489A (xx)
JP (1) JPS5220947B1 (xx)
AT (1) AT296924B (xx)
DE (1) DE1815521A1 (xx)
FR (1) FR1555869A (xx)
GB (1) GB1212740A (xx)
SE (1) SE357894B (xx)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810378A (en) * 1972-07-04 1974-05-14 S Kozhevnikov Apparatus for balancing inertial forces of reciprocating masses of tube cold rolling mill stand
US3890821A (en) * 1973-06-07 1975-06-24 Wean United Inc Cold pilger rolling mill and method for the rolling of tubes
US4052898A (en) * 1976-09-13 1977-10-11 Wean United, Inc. Crank drive system for cold pilger mills drive or the like
FR2477912A1 (fr) * 1980-03-17 1981-09-18 Mannesmann Ag Laminoir a pas de pelerin a encombrement reduit
US4858458A (en) * 1987-02-23 1989-08-22 Mannesmann Aktiengesellschaft Drive for a pilger cold-rolling mill with balancing of masses and moments
US5076088A (en) * 1986-04-15 1991-12-31 Mannesmann Ag Drive for a pilger cold rolling mill
US5540076A (en) * 1993-10-20 1996-07-30 Mannesmann Aktiengesellschaft Crank mechanism for a cold pilger rolling mill
US6341516B1 (en) * 1997-09-16 2002-01-29 Ishikawajima-Harima Heavy Industries Co., Ltd. Plate reduction press apparatus and methods
US7137283B2 (en) 1997-10-14 2006-11-21 Ishikawajima-Harima Heavy Industries Co., Ltd. Plate reduction press apparatus and methods
CN1315590C (zh) * 1997-09-16 2007-05-16 石川岛播磨重工业株式会社 板厚的压板装置及其方法
CN102671949A (zh) * 2011-03-07 2012-09-19 吴江市中信科技有限公司 一种轧头机
CN101791630B (zh) * 2009-02-04 2013-11-13 Sms米尔股份有限公司 用于轧机的驱动系统
US9086124B2 (en) 2009-11-24 2015-07-21 Sandvik Materials Technology Deutschland Gmbh Drive for a pilger roller system
CN104853857A (zh) * 2012-12-17 2015-08-19 山特维克原料技术德国公开股份有限公司 具有曲柄驱动机构的皮尔格式轧管机
US9120135B2 (en) 2009-05-15 2015-09-01 Sandvik Materials Technology Deutschland Gmbh Chuck for a cold-pilgering mill
US10155257B2 (en) 2009-05-15 2018-12-18 Sandvik Materials Technology Deutschland Gmbh Feed drive for a cold pilgering mill

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725276C3 (de) * 1977-06-01 1980-11-20 Mannesmann Ag, 4000 Duesseldorf Kaltpilgerwalzwerk
FR2557819B1 (fr) * 1984-01-05 1986-05-02 Vallourec Procede permettant d'accroitre les performances des laminoirs a pas de pelerin a froid, et dispositif pour la mise en oeuvre de ce procede
DE4124691C1 (xx) * 1991-07-22 1992-02-27 Mannesmann Ag, 4000 Duesseldorf, De

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810378A (en) * 1972-07-04 1974-05-14 S Kozhevnikov Apparatus for balancing inertial forces of reciprocating masses of tube cold rolling mill stand
US3890821A (en) * 1973-06-07 1975-06-24 Wean United Inc Cold pilger rolling mill and method for the rolling of tubes
US4052898A (en) * 1976-09-13 1977-10-11 Wean United, Inc. Crank drive system for cold pilger mills drive or the like
FR2477912A1 (fr) * 1980-03-17 1981-09-18 Mannesmann Ag Laminoir a pas de pelerin a encombrement reduit
US4386512A (en) * 1980-03-17 1983-06-07 Wean United, Inc. Pilger tube rolling mill
US5076088A (en) * 1986-04-15 1991-12-31 Mannesmann Ag Drive for a pilger cold rolling mill
US4858458A (en) * 1987-02-23 1989-08-22 Mannesmann Aktiengesellschaft Drive for a pilger cold-rolling mill with balancing of masses and moments
US5540076A (en) * 1993-10-20 1996-07-30 Mannesmann Aktiengesellschaft Crank mechanism for a cold pilger rolling mill
US6761053B2 (en) 1997-09-16 2004-07-13 Ishikawajima-Harima Heavy Industries Co., Ltd. Plate reduction press apparatus and methods
US6467323B1 (en) * 1997-09-16 2002-10-22 Ishikawajma-Harima Heavy Industries, Co., Ltd Plate reduction press apparatus and methods
US6341516B1 (en) * 1997-09-16 2002-01-29 Ishikawajima-Harima Heavy Industries Co., Ltd. Plate reduction press apparatus and methods
CN1315590C (zh) * 1997-09-16 2007-05-16 石川岛播磨重工业株式会社 板厚的压板装置及其方法
US7137283B2 (en) 1997-10-14 2006-11-21 Ishikawajima-Harima Heavy Industries Co., Ltd. Plate reduction press apparatus and methods
CN101791630B (zh) * 2009-02-04 2013-11-13 Sms米尔股份有限公司 用于轧机的驱动系统
US9120135B2 (en) 2009-05-15 2015-09-01 Sandvik Materials Technology Deutschland Gmbh Chuck for a cold-pilgering mill
US10155257B2 (en) 2009-05-15 2018-12-18 Sandvik Materials Technology Deutschland Gmbh Feed drive for a cold pilgering mill
US9086124B2 (en) 2009-11-24 2015-07-21 Sandvik Materials Technology Deutschland Gmbh Drive for a pilger roller system
CN102671949A (zh) * 2011-03-07 2012-09-19 吴江市中信科技有限公司 一种轧头机
CN104853857A (zh) * 2012-12-17 2015-08-19 山特维克原料技术德国公开股份有限公司 具有曲柄驱动机构的皮尔格式轧管机
KR20150097673A (ko) * 2012-12-17 2015-08-26 산드빅 마테리알스 테크놀로지 도이칠란트 게엠베하 크랭크 구동부를 갖는 필거 롤링 밀
US9539627B2 (en) 2012-12-17 2017-01-10 Sandvik Materials Technology Deutschland Gmbh Pilger rolling mill with a crank drive

Also Published As

Publication number Publication date
AT296924B (de) 1972-03-10
DE1815521B2 (xx) 1974-10-24
FR1555869A (xx) 1969-01-31
GB1212740A (en) 1970-11-18
JPS5220947B1 (xx) 1977-06-07
DE1815521A1 (de) 1969-07-10
SE357894B (xx) 1973-07-16

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