US3564891A - Continuous rolling mills and/or repeater rolling mills - Google Patents

Continuous rolling mills and/or repeater rolling mills Download PDF

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Publication number
US3564891A
US3564891A US739023A US3564891DA US3564891A US 3564891 A US3564891 A US 3564891A US 739023 A US739023 A US 739023A US 3564891D A US3564891D A US 3564891DA US 3564891 A US3564891 A US 3564891A
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United States
Prior art keywords
rolling
repeater
stand
rolling stand
rolling mills
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Expired - Lifetime
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US739023A
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English (en)
Inventor
Sven Erik Malte Norlindh
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Morgardshammar AB
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Morgardshammar AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/06—Fastening stands or frames to foundation, e.g. to the sole plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands

Definitions

  • Rolling of bars, wire or strip is made in rolling mills comprising several rolling stands. These rolling stands can either be arranged so that the rolled material passes from stand to stand in a substantially straight line, or the stands can be arranged so that the hot material forms a wave line with side loops of 180 to 90 direction change between subsequent stands.
  • the straight line arrangement is called a continuous mill arrangement, and the arrangements with side loops are called repeater mill arrangements. Repeater mill arrangements with less than 180 deflection of the material are also called wave line mill arrangements.
  • the slack can only provide a stored excess length of the hot material of about 3 inches between two stands. At a rolling speed of, for instance 6,000 ft./min., this slack will be consumed in A second if the speed error is only 1%. Tremendous speed and precision are thus required of the motor speed control for the different rolling stands, if the slack is to be maintained at all times.
  • the wave line mill arrangement is particularly useful at very high rolling speeds, since the resistance owing to the friction caused by the centrifugal force when passing a 90 repeater is only half the resistance encountered when passing a 180 repeater.
  • the aim of the present invention is to achieve so flexible and adjustable a rolling stand unit that thanks to this rolling stand unit one is able to build a rolling mill which may easily be adjusted to any actual requirement and thus provide the rolling mill arrangement which is most suitable for the rolling at hand.
  • the present invention is mainly characterized in that the rolling stand unit is provided with devices for the adjustment of the pass line of the rolling stand to various side angles in relation to the main rolling direction of the rolling mill.
  • the rolling stand units may be rotatable with the axis of rotation coinciding substantially with the pass line, in which case twist guides become superfluous when the hot material is transferred from one rolling stand to the next.
  • the rolling stand unit according to the invention should also be made rotatable with the axis of rotation coinciding substantially with the pass line of the rolling stand so that elevation angle adjustment becomes possible and twist guides can be avoided.
  • FIGS. 1 to 4 The present invention is exemplified in FIGS. 1 to 4 where FIG. 1 is a plan view of three rolling stand units arranged in a straight continuous mill arrangement.
  • FIG. 2 is a plan view of three rolling stand units in a wave line mill arrangement.
  • FIG. 3 is a plan view of three rolling stand units in repeater rolling mill arrangement.
  • FIG. 4 is an end view according to line IVIV in FIG. 3. a
  • 0 represents the main rolling direction of the three rolling stand units 1, 2 and 3 the pass lines of which are marked 11, 21 and 31 (FIGS. 2 and 3).
  • the side angles of the pass lines in relation to the main rolling direction 0 are marked 12, 22 and 32 (FIGS. 2 and 3).
  • the elevation angle adjustment of the rolling stands in FIG. 4 is marked 13, 23 and 33.
  • a rolling stand unit (FIG. 1) consists of a rolling stand and a driving device and thus comprises rolls 4, a roll chock with bearings 5, roll adjustment equipment 6, couplings 7, framework 46, reduction gear 8 and driving motor 9, which may be cooled by means of a fan and heat exchanger 10, if desired.
  • Every rolling stand unit can be adjusted to the desired side angle position 12, 22, 32 (FIGS. 2 and 3) in relation to the main rolling direction 0, turning on pivots 41, which may be vertical, or inclined, if one should wish to make the repeater plane slope towards the horizontal plane.
  • the main rolling direction 0 is defined as the connecting line between pivots 41 of the various rolling mill stands.
  • the pivots 41 for the side angle adjustment may comprise a support stand 47 (FIG. 4) with a thrust bearing device, fixed to the concrete foundation 48, and accepting a pivot axle 42 supporting the mill stand unit framework 46.
  • a transverse axle 44 for elevation angle adjustment is mounted in a transverse bearing or eye in the pivot axle.
  • the mating surfaces may be in the shape of threads 43, as shown in FIG. 1 (center part). The threads 43 will take up the axial forces arising during rolling.
  • the connecting frame 46 of the rolling stand unit may be made to slide on an extension of the transverse axle 44 via sliding guide surfaces 45, which makes it possible to displace the rolling stand unit laterally when changing grooves.
  • pivot axle 42 and the transverse axle 44 form a cardanic suspension of the rolling stand units, allowing simultaneous adjustment of side angles (12, 22, 32) and elevation angles (13, 23, 33) of each rolling stand unit.
  • each mill stand unit will be locked in the desired position, for instance by means of supports 49 (FIG. 4).
  • the side angle may be made to vary between about 45 in a clockwise direction (12, 32 in FIG. 2) and about 150 in a counterclockwise direction (22 in FIG. 3) while the elevation angle may be made to vary between a vertical position with the driving machinery downwards (angle 23 in FIG. 4) and a vertical position with the driving machinery upwards, if so large an elevation angle adjustment should be desirable.
  • FIG. 1 which shows a straight continuous line
  • the hot material runs straight through the three rolling stands 1, 2 and 3, and the passlines in the various rolling stands 11, 21 and 31 coincide with the main rolling direction 0.
  • the side angles are zero but the elevation angles may vary according to requirement in each particular case. It is also possible to apply loop regulation between the rolling stands in a known manner, even though the possible slack is very small in this case.
  • rolling stand 1 is shown at an elevation angle of 45 in relation to the vertical line. This arrangement is suitable for oval-square rolling, since the square from rolling stand 1 is then inserted into the oval groove of rolling stand 2 placed on the fiatside (see FIG. 4). If rolling stand 1 were in a vertical position the square would be caught in a diagonal position in rolling stand 2 and then turn onto the flat side. The leading part of the oval would then be filled more completely or possibly be overfilled and the entry guides before rolling stand 2 would have to be adjusted so that they are wider than the side of the square.
  • the intermediate oval before rolling stand 1 must be turned 45 before entering into rolling stand 1, which as a matter of fact is no disadvantage, since there is so great a difference between the width and .4 thickness of intermediate ovals that this may easily be done by means of twist guides.
  • the rolling stands are arranged with an elevation angle of 90 in relation to each other.
  • a control pulpit is usually placed relatively high above the floor plane in order to give a good view of the rolling mill. If the pivot 41 in FIG. 4 is arranged with 20 inclination to the vertical line, the repeater plane will be inclined 20 towards the floor plane. The' control pulpit can then be placed on or slightly above the floor plane and give as good a view as in conventional mills. This means that, when required, the mill operator can take part in the work in the rolling train without first climbing down from a control pulpit placed high above the floor.
  • a rolling stand unit for a rolling mill having a plurality of such rolling stand units, the main direction of rolling being defined by a connecting line between the stand units, and a pass line for each rolling stand unit being defined by the axis of the material being rolled in each stand, said rolling stand unit comprising pivot means for permitting rotation of said rolling stand unit about an axis substantially perpendicular to said pass line, thereby allowing variation of the side angle between said pass line and said main rolling direction.
  • a rolling stand as claimed in claim 1 wherein said pivot means comprises a shaft secured to said rolling unit and a bearing device fixedly mounted on the foundation for the mill, said shaft being rotatably mounted in said bearing device.
  • a rolling mill comprising a plurality of rolling stand units as claimed in claim 1 wherein each pivot means of the individual stands are arranged to make the axes of all the stands substantially parallel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US739023A 1967-06-22 1968-06-21 Continuous rolling mills and/or repeater rolling mills Expired - Lifetime US3564891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8938/67A SE317343B (enrdf_load_stackoverflow) 1967-06-22 1967-06-22

Publications (1)

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US3564891A true US3564891A (en) 1971-02-23

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Application Number Title Priority Date Filing Date
US739023A Expired - Lifetime US3564891A (en) 1967-06-22 1968-06-21 Continuous rolling mills and/or repeater rolling mills

Country Status (11)

Country Link
US (1) US3564891A (enrdf_load_stackoverflow)
AT (1) AT291162B (enrdf_load_stackoverflow)
BE (1) BE716987A (enrdf_load_stackoverflow)
DE (1) DE1752615A1 (enrdf_load_stackoverflow)
ES (1) ES355333A1 (enrdf_load_stackoverflow)
FR (1) FR1572696A (enrdf_load_stackoverflow)
GB (1) GB1225641A (enrdf_load_stackoverflow)
NL (1) NL6808819A (enrdf_load_stackoverflow)
NO (1) NO125523B (enrdf_load_stackoverflow)
SE (1) SE317343B (enrdf_load_stackoverflow)
YU (1) YU32517B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811309A (en) * 1971-09-10 1974-05-21 K Nordstrom Method and apparatus for cold drawing or rolling of metal wire rod
US3851510A (en) * 1969-02-18 1974-12-03 Demag Ag Method and apparatus for finishing a rolling bar using a displaceable intermediate stand between two end roll stands

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206168B (de) * 1960-06-29 1965-12-02 Willy Salchow Schallplattenschoner
JP3555751B2 (ja) * 1999-11-26 2004-08-18 本田技研工業株式会社 圧延装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851510A (en) * 1969-02-18 1974-12-03 Demag Ag Method and apparatus for finishing a rolling bar using a displaceable intermediate stand between two end roll stands
US3811309A (en) * 1971-09-10 1974-05-21 K Nordstrom Method and apparatus for cold drawing or rolling of metal wire rod

Also Published As

Publication number Publication date
AT291162B (de) 1971-07-12
SE317343B (enrdf_load_stackoverflow) 1969-11-17
NL6808819A (enrdf_load_stackoverflow) 1968-12-23
YU145768A (enrdf_load_stackoverflow) 1974-06-30
BE716987A (enrdf_load_stackoverflow) 1968-12-02
NO125523B (enrdf_load_stackoverflow) 1972-09-25
GB1225641A (enrdf_load_stackoverflow) 1971-03-17
YU32517B (en) 1974-12-31
ES355333A1 (es) 1969-11-16
DE1752615A1 (de) 1971-09-02
FR1572696A (enrdf_load_stackoverflow) 1969-06-27

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