US3821889A - Work rolls drive in a cold-rolling tube mill - Google Patents

Work rolls drive in a cold-rolling tube mill Download PDF

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Publication number
US3821889A
US3821889A US00292678A US29267872A US3821889A US 3821889 A US3821889 A US 3821889A US 00292678 A US00292678 A US 00292678A US 29267872 A US29267872 A US 29267872A US 3821889 A US3821889 A US 3821889A
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US
United States
Prior art keywords
gears
racks
roll
group
rolls
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Expired - Lifetime
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US00292678A
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English (en)
Inventor
T Saksagansky
P Orro
B Iskra
A Kirilenko
V Matveev
B Varenik
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Individual
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Individual
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Publication date
Priority to DE19722265152 priority Critical patent/DE2265152A1/de
Priority to DE2245721A priority patent/DE2245721A1/de
Application filed by Individual filed Critical Individual
Priority to US00292678A priority patent/US3821889A/en
Priority to GB4474672A priority patent/GB1397834A/en
Priority to FR7235707A priority patent/FR2201931B1/fr
Application granted granted Critical
Publication of US3821889A publication Critical patent/US3821889A/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

Definitions

  • prospekt K. Marxa 20, kv. 85; [56] References c'ted Pavel Ivanovich Orro, ulitsa Kirova, UNITED STATES PATENTS 8, kv. 25; Boris Alexandrovich 2,680,391 6/1954 Kaiser 72/189 Iskra, prospekt K. Marxa, 68, kv. 3,308,643 3/1967 Fahrenholz et a1. 72/189 X 15; Vladimir Sergeevich Matveev, ulitsa Bozhenko, 7, kv. 1; Boris Iovich Varenik, Oktyabrskaya ploschad, 5, kv.
  • ABSTRACT A drive comprising movable racks which are linked with connecting rods driven from the main drive and engaged with the gears of the driven roll, imparting thereto rotational and reciprocatory motions in the course of rolling.
  • the improvement of the drive is aimed at reducing the weight of its movable components, so as to enable its number of double strokes to be increased.
  • the present invention relates generally to tube rolling, and more specifically, it relates to drives of the work rolls in cold-rolling tube mills.
  • a drive of work rolls with a reducing pass in a cold-rolling tube mill comprising a sta-v tionary stand with racks secured thereon wherealong rolling are the gears of the driven roll, the latter being connected through a gear to the other roll and being reciprocated from the main drive of the mill through gear cranks and connecting rods.
  • the two rolls are combined into one unit by means of a casing whereto attached are the connecting rods that impart reciprocatory movement to the rolls. Since movement of the rolls requiressignificant axial forces, these forces are transmitted from the connecting rods to the rolls through the casing, the latter should be robust and strong enough.
  • this involves an increased weight of the movable components of the rolls drive, which substantially limits the possibility of increasing the number of double strokes of the rolls per unit of time.
  • the adverse effect of the additional weight of the movable components sharply rises with the growth of the typeand-size of the tube mill having a tube diameter of 200-250 mm and more.
  • the work rolls carry driving gears that provide for a medium effective radius of rolling all along the length of the roll pass, the latter having a varying effective radius along its length which causes enhanced slippage of the pass against the tube, thus worsening the surface quality of the rolled tubes, speeding up the wear of the passes, and increasing the number of collisions of the ends of the tube being rolled and the pushing tube.
  • a drive of work rolls with a reducing pass in a cold-rolling tube mill comprising a stationary stand with racks secured thereon wherealong rolling are the gears of the driven roll, the latter being connected through a gear to the other roll and being reciprocated from the main drive of the mill by means of gear cranks and connecting rods.
  • the drive includes: a second group of racks which are movable and linked to the connecting rods for engaging the gears of the driven roll, imparting thereto rotational and reciprocatory movement; a third group of racks mounted on the stand having intermediate gears engaged therewith, these gears being rotated by the gears of the second roll; and an arrangement to maintain vertical alignment of the rolls and to assure engagement of the intermediate gears with the gears of the second roll and with the racks of the third group.
  • the arrangement for maintaining vertical alignment of the rolls should advantageously be made in the form of flat cages secured on the second roll and flat straps adjoining them, the cages having lugs embracing the driven roll. Between the cages and straps, there are mounted idler gears on one side and bearing rollers on the other side.
  • a roll drive has been developed that has a lower weight of its movable components, thereby enabling the number of double strokes per unit of time to be increased, and permitting also a reduction in the slippage of the pass against the tube in the course of its rolling.
  • FIG. 1 is a longitudinal sectional view of the drive of work rolls in a cold-rolling tube mill according to the invention
  • FIG. 2 is sectional view along lines IIII in FIG. 1.
  • a drive of a cold-rolling mill for producing thin-walled tubes (wherein the ratio of their diameter to the wall thickness is within -50) comprises connecting rods 1 hinged to gear cranks 2 rotated from the main drive (not shown) and a crossbar 3.
  • Crossbar 3 is mounted in the slots of mov-, able racks 4 (the second group of racks) and is rigidly fixed thereto by dowels 5.
  • the movable racks 4 are disposed in guides 6 which are fixed on a bottom wall 7 of a stationary stand 8. Pairs of travelling rollers 9 which during the movement of the racks roll along guides 6 are placed along the movable racks 4.
  • the movable racks 4 are meshed with cluster gears 10 seated on a driven roll 11.
  • Guides 13 are fixed on side walls 12 of the stationary stand 8 said guides accommodating racks 15 (the first group of racks) which are longitudinally springed at both ends by springs 14 and meshed with the cluster gears 10 of the driven roll 11.
  • Gears 17 meshing with the cluster gears 10 of the drivenroll 11 are mounted on the second roll, and flat cages 18 and flat straps 19 are freely seated.
  • Cages 18 have lugs 20 which embrace the driven roll 11, thus assuring vertical alignment of the rolls 11 and 16.
  • Idler gears 21 meshing with gears 17 of the second roll 16 and free-wheeling bearings rollers 22 are located between the cages l8 and the straps 19.
  • the guides 24 accomodating the third group of racks 25 which are springed at both ends by springs 26 and are capable of longitudinal displacements, allowing engagement of the idler gears 21 with the racks 25 the third groups of racks.
  • the bearing rollers 22 have eccentric hubs (not shown), to regulate their position in height and adjust the mesh of the idler gears 21 with racks 25 (the third group of racks).
  • Bearing plates are fixed on the bottom wall 7 and the top wall 23 of the stationary stand 8, wherealong move travelling rollers 28 of the rolls 11 and 16-.
  • the distance between the bottom and top rest bars is regulated by wedges 29.
  • the drive of the work rolls operates as follows.
  • the gear cranks 2 through connecting rods 1 and crossbar 3 impart reciprocatory motion to the movable racks (the second group of racks) which through the cluster gears rotate the driven roll 11.
  • the cluster gears 10 rolling along racks which are secured on the stand, impart progressive motion to the driven roll 11.
  • reciprocation of the movable racks 4 provides for rotational and reciprocatory movement of the driven roll 11.
  • the driven roll 11 through cluster gears 10 and gears 17 transmits rotation to the upper roll 16.
  • gears 17 rotate the idler gears 21 which, while travelling along racks 25 (the third group of racks), impart reciprocatory motion to the second roll 16.
  • the second roll 16 rotates and reciprocates in synchronism with the driven roll 11.
  • Rotation and reciprocation of the work rolls 11 and 16 by means of movable racks 4 linked through connecting rods 1 with the gear cranks 2 of the main drive make it possible to reduce the weight of the movable components of the drive, and thus to increase the number of its double strokes per unit of time.
  • the slippage of the pass against the tube is due to the discrepancies which are bound to occur in the course of rolling between the effective radius of pass rolling against the tube and the radius of engagement of the cluster gears 10 with the movable racks 4 (the second group of racks) which during the tube deformation produces axial forces of friction involving the pass slippage against the tube, and hence, deterioration of the surface quality of the tube being rolled.
  • a drive of work rolls with areducing pass in a coldrolling tube mill comprising: a stationary stand; gears which are mounted on the rolls, one of the rolls is a driven roll and a second such roll being connected to the first roll through said gears; idler gears engaged with said gears of the second roll; toothed racks secured on said stationary stand, a part of said toothed racks defining a first group of racks engaging said gears of the driven roll, a further part of said toothed racks defining a third group of racks meshed, with said idler gears; movable toothed racks defining a second group of racks linked to connecting rods driven by gear cranks of the main drive, said movable toothed racks engaging said gears of the driven roll and imparting to these gears and roll rotational and reciprocatory motions, thereby imparting these motions to said gears of the second roll meshed therewith and to said second roll itself, and further imparting said motions to said idler gears engaging the
  • a drive as claimed in claim 1, wherein means for maintaining vertical alignment of said rolls is made in the form of flat cages secured on said second roll and flat straps adjoining them, said cages having lugs which embrace said driven roll, said idler gears being mounted between said cages and straps on one side and bearing rollers on the other side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Transmission Devices (AREA)
US00292678A 1972-09-18 1972-09-27 Work rolls drive in a cold-rolling tube mill Expired - Lifetime US3821889A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19722265152 DE2265152A1 (de) 1972-09-18 1972-09-18 Einrichtung zur vermeidung des gleitens zwischen arbeitswalze und rohr waehrend des pilgerwalzens
DE2245721A DE2245721A1 (de) 1972-09-18 1972-09-18 Antrieb fuer die arbeitswalzen von rohrkaltwalzwerken
US00292678A US3821889A (en) 1972-09-18 1972-09-27 Work rolls drive in a cold-rolling tube mill
GB4474672A GB1397834A (en) 1972-09-18 1972-09-28 Apparatus for tube rolling
FR7235707A FR2201931B1 (enrdf_load_stackoverflow) 1972-09-18 1972-10-09

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2245721A DE2245721A1 (de) 1972-09-18 1972-09-18 Antrieb fuer die arbeitswalzen von rohrkaltwalzwerken
US00292678A US3821889A (en) 1972-09-18 1972-09-27 Work rolls drive in a cold-rolling tube mill
GB4474672A GB1397834A (en) 1972-09-18 1972-09-28 Apparatus for tube rolling
FR7235707A FR2201931B1 (enrdf_load_stackoverflow) 1972-09-18 1972-10-09

Publications (1)

Publication Number Publication Date
US3821889A true US3821889A (en) 1974-07-02

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ID=27431551

Family Applications (1)

Application Number Title Priority Date Filing Date
US00292678A Expired - Lifetime US3821889A (en) 1972-09-18 1972-09-27 Work rolls drive in a cold-rolling tube mill

Country Status (4)

Country Link
US (1) US3821889A (enrdf_load_stackoverflow)
DE (1) DE2245721A1 (enrdf_load_stackoverflow)
FR (1) FR2201931B1 (enrdf_load_stackoverflow)
GB (1) GB1397834A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034589A (en) * 1975-10-15 1977-07-12 Korshunov Evgeny Mill for rolling continuously cast ingot
US4044584A (en) * 1975-10-15 1977-08-30 Korshunov Evgeny Mill for rolling continuously cast ingot

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905244C2 (de) * 1989-02-21 1995-05-11 Mannesmann Ag Verfahren und Vorrichtung zur Herstellung von strangförmigem metallischen Gut

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal
US3308643A (en) * 1964-04-13 1967-03-14 Mannesmann Meer Ag Rolling frame for pilgrim mill

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR439366A (fr) * 1911-04-04 1912-06-12 Escaut Et Meuse D Système de commande pour cylindres de laminoirs
US2161065A (en) * 1936-12-02 1939-06-06 Frank R Krause Apparatus for reducing tubular blanks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680391A (en) * 1951-08-17 1954-06-08 Ingersoll Milling Machine Co Apparatus for working metal
US3308643A (en) * 1964-04-13 1967-03-14 Mannesmann Meer Ag Rolling frame for pilgrim mill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034589A (en) * 1975-10-15 1977-07-12 Korshunov Evgeny Mill for rolling continuously cast ingot
US4044584A (en) * 1975-10-15 1977-08-30 Korshunov Evgeny Mill for rolling continuously cast ingot

Also Published As

Publication number Publication date
FR2201931B1 (enrdf_load_stackoverflow) 1977-08-05
FR2201931A1 (enrdf_load_stackoverflow) 1974-05-03
DE2245721A1 (de) 1974-04-04
GB1397834A (en) 1975-06-18

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