US2071712A - Roll stand unit for a continuous reducing mill - Google Patents

Roll stand unit for a continuous reducing mill Download PDF

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Publication number
US2071712A
US2071712A US726379A US72637934A US2071712A US 2071712 A US2071712 A US 2071712A US 726379 A US726379 A US 726379A US 72637934 A US72637934 A US 72637934A US 2071712 A US2071712 A US 2071712A
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United States
Prior art keywords
wheels
gear
cone
spur
wheel
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Expired - Lifetime
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US726379A
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English (en)
Inventor
Stuting Heinrich
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Individual
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Individual
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Publication of US2071712A publication Critical patent/US2071712A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Definitions

  • This invention relates to a toothed roller frame for rolling mills for reducing tubes to a smaller diameter.
  • Such rolling mills consist of several passes arranged one behind the other, wherein it is of special importance that the distance from pass to pass should be kept as short as possible.
  • this means the space requirements and the working costs will be reduced and finally this reduction in length presents from the point of view of roller technology the great advantage that the unavoidable thickening of the freely running ends, which occurs between the passes is limited to as small a length of tube as possible.
  • the transmission means within the gear body an arcuate arrangement of cone wheels in engagement with one another corresponding in number to the roller shafts to be driven. Pairs of spur wheels connect the spindles of the cone wheels to the roller shafts. Since the planes of diameter of the cone wheels arranged in circular formation lie in the direction of the breadth of the roller frame, and both the cone wheels and also the'spur wheels connected thereto must receive not inconsiderable dimensions owing to considerations of stability and durability, there results in this construction a relatively large breadth dimension and together therewith a large pass pitch.
  • a double circle of toothed wheels is employed, which consists in one part of a spur wheel and in the other part of a cone wheel; the drive of the roller shafts occurs from the driven cone wheel pinions by the aid of pairs of spur wheels.
  • the object sought namely to reduce the breadth of the structure is attained by the use of a gear consisting of spur wheels.
  • spur wheels are all in engagement with one another and are equal in number to the roller shafts which are to be driven.
  • the pivots of the spur wheels all lie on one circular periphery.
  • the drive was effected by a common circle of spur wheels or a spur wheel
  • the transmission of the driving motion according to the invention occurs from'a spur wheel to the adjacent spur wheel which is in engagement therewith. This again drives the immediately adjacent spur wheel and so on until the circle is closed. It is therefore merely necessary that the rotary movement be introduced into one of these spur wheels from an external source by a driving wheel in engagement therewith, in order to drive all spur wheels and thus the roller shafts driven thereby.
  • the width of structure of the gear according to the invention is very small.
  • the economy in structural width is-even quite substantial; the cone wheels lie with the. plane of their diameter in the direction of breadth and already take up thereby a fairly considerable one another and which according to the typeof spur wheel is arranged in one plane, presents therefore the smallest attainable breadth of structure and may, since the principal expanse of this gear lies in one plane, whilst the expanse vertically thereto, that is to say, in the direction of breadth is infinitesimally small, be designated as a plane gear.
  • the number of wheels of this plane gear is identical with the number of rollers to be driven. Therefore, if the roller frame contains two passes for every four rollers, then the plane gear consists of eight spur wheels. In a three roller pass the plane gear is provided with six wheels; in the case of passes with more than four rollers the plane gear would consist of a correspondingly larger number of wheels. Finally, the case may arise where the gear body is intended to serve as means for driving one pass. In this case the number of wheels of the gear will be twice as large as the number of rollers; for driving therefore only half the number of wheels will be employed, whilst the intermediately disposed spur wheels serve as socalled intermediate wheels.
  • the plane gear according to the invention therefore owing to the arcuate arrangement of its wheels, leaves the inner space within the wheels free. Since the wheels require mounting in a surrounding casing, this latter is likewise designed in arcuate form and'may in its central part be constricted, that is to say, limited in breadth, to such an extent as is consistent with considerations of stability.
  • the roller shafts are driven by the wheels of v the plane gear.
  • the cone wheels known per se are employed but however in a special arrangement,
  • the employment of cone wheels at this point instead of within the gear body is in itself already an advantage, when the aim to be pursued is to limit the breadth of structure to as large an extent as possible.
  • the cone wheels In the gear body the cone wheels must be designed according to the peripheral forces which are set up from the rolling work to be performed by the two passes. If therefore every pass has four rollers, the cone wheels must be designed to accord with eight times the peripheral force, which is required by one roller for driving purposes.
  • the cone wheels only serve however for driving one roller shaft each, so that they are accordingly lighter and smaller and more particularly take up less space in regard to breadth.
  • the drawing shows by way of example one embodiment of the subject-matter of the invention.
  • Fig. 1 shows the mechanism in elevation
  • Fig. 2 is a view partly in section looking from the left of Fig. 1.
  • the plane gear consists of the spur wheels I the pivots of which lie on the circumference of a circle, and which are all in engagement with one another.
  • the spur wheels I rest on shafts 2,
  • bearings 3 and 4 are provided.
  • the spindles 2 are provided at their ends with drive cone wheels 5, which are in engagement with the driven cone wheels 6. These latter are mounted on the roller shafts I, which are carried by the bearings 8 and 9, and on the inner ends of which the rollers I0 are secured, which constitute the passes.
  • the plane gear with the wheels I and the bearings 3 and 4 are surrounded by the casing I I, which is designed in arcuate form having an inner ring space and contains concentric apertures at the centres of the wheels, which alternately lie on one and the other side. These apertures are centred relatively to the borings of the bearings 3 and 4 during manufacture and are of such size, that the wheels I may be inserted therethrough into the casing. These apertures are closed by the wheel casings I2 of the cone wheel gear. With these wheel casings are combined the bearings 8 and 9, so that they together with the roller shafts, their bearings, the driven cone wheel 6 and the rollers II. constitute so-called constructional units.
  • the constructional units I2 which engage with their centerings into the machined apertures of the casing I I may thus, as the drawing shows, be rotated about the central axes of the rollers 2, without the engagement of the cone wheels 5 and 6 undergoing any change.
  • This arrangement which is known in itself, demonstrates particularly the appropriateness of the constructional design according to the invention.
  • By rotating the constructional units I2 the subsequent adjustment of the passes is effected. Since there is in this case concerned the compensation of a slight difference in the wheels due to wear, it is sufiicient that the securing screws of the constructional units I2 be introduced through apertures of larger diameter, so that thereby a slight play of the constructional units about the axis 2 is provided.
  • the pressure screws l3 contribute towards taking up the roller pressure which occurs and to relieve the load on the fastened screws of the constructional units. Whilst, as a matter of fact, the pressure of the roller acts for example, on the constructional unitin an anti-clockwise direction the adjusting screws secured on the constructional unit exerts a pressure thereon in a clockwise direction.
  • l5 refers to the driving shaft which through a spur wheel l6 secured thereon, which engages in one of the eight wheels I of the plane gear as shown, drives this latter and together therewith the gear as a whole.
  • a roll stand unit for a continuous reducing mill comprising a housing having parallel front and rear walls in close spaced relation, a plurality of cooperating grooved rolls forming a substantially closed pass for the workpiece, the front and rear housing walls having work openings in line with the pass, a carrier for each roll pivotally mounted on one of said housing walls and extending inward toward the pass, a roll spindle mounted in bearings'on each carrier and extending radially of the pivotal axis of the carrier and having the roll mounted on its inner end, a bevel gear for driving each roll mounted on the other housing wall to turn about an axis in alignment with the pivotal airis of the roll carrier, 9. bevel pinion on the outer end of each roll shaft meshing with its bevel. gear, and means for driving said bevel gears at equal speed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US726379A 1933-05-24 1934-05-18 Roll stand unit for a continuous reducing mill Expired - Lifetime US2071712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE427507X 1933-05-24

Publications (1)

Publication Number Publication Date
US2071712A true US2071712A (en) 1937-02-23

Family

ID=6477319

Family Applications (1)

Application Number Title Priority Date Filing Date
US726379A Expired - Lifetime US2071712A (en) 1933-05-24 1934-05-18 Roll stand unit for a continuous reducing mill

Country Status (4)

Country Link
US (1) US2071712A (enrdf_load_stackoverflow)
BE (1) BE402934A (enrdf_load_stackoverflow)
FR (1) FR772756A (enrdf_load_stackoverflow)
GB (1) GB427507A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226814A (en) * 1961-10-05 1966-01-04 Copperweld Steel Co Wire cladding system
US3345847A (en) * 1965-12-14 1967-10-10 Mannesmann Meer Ag Roll-straightening machine
US6397650B1 (en) * 1999-06-24 2002-06-04 Kawasaki Steel Corporation Roll stand for bar and wire rod rolling mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226814A (en) * 1961-10-05 1966-01-04 Copperweld Steel Co Wire cladding system
US3345847A (en) * 1965-12-14 1967-10-10 Mannesmann Meer Ag Roll-straightening machine
US6397650B1 (en) * 1999-06-24 2002-06-04 Kawasaki Steel Corporation Roll stand for bar and wire rod rolling mill

Also Published As

Publication number Publication date
BE402934A (enrdf_load_stackoverflow)
GB427507A (en) 1935-04-25
FR772756A (fr) 1934-11-06

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