US3552164A - Rolling mill - Google Patents

Rolling mill Download PDF

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Publication number
US3552164A
US3552164A US706378A US3552164DA US3552164A US 3552164 A US3552164 A US 3552164A US 706378 A US706378 A US 706378A US 3552164D A US3552164D A US 3552164DA US 3552164 A US3552164 A US 3552164A
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United States
Prior art keywords
rolling
rolls
fluid
stock
cooling
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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
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US706378A
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English (en)
Inventor
Ilario Properzi
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Individual
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Classifications

    • 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
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • B21B13/103—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for rolling bars, rods or wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0257—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • 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
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides

Definitions

  • a rolling unit in a rolling mill for rolling metal stock comprises three rolls spaced at angles of 120 about a rolling axis. The peripheral outlines of the rollers define the shape of the cross-section desired for the metal stock.
  • Means are provided for simultaneously cooling and lubricating with a first fluid at adjustable pressure the metal stock and the stock-engaging surfaces of the rolls and with a second fluid at independently adjustable pressure the guide members which serve to guide the metal stock and the remaining portions of the rolls not cooled BACKGROUND OF THE INVENTION
  • the present invention relates generally to rolling mills such as are employed for the rolling of metal stock into the shape of bars, wires or analogously configurated products.
  • the present invention is concerned with an improved rolling unit for use in such rolling mills.
  • Another known solution uses water nozzles arranged in a certain manner.
  • the coolant may be a cooling and lubricating liquid which is continuously passed over the rolls and the work piece.
  • a more particular object of the invention is to provide an improved rolling unit of a rolling mill, wherein the stock, the guide members for the stock, and the rolls are all cooled to the respectively necessary extent without danger that the degree of cooling of one type of element might adverse influence another type of element which requires a different degree of cooling.
  • Another object of the invention is to provide such a rolling unit, and cooling and lubrication therefor, wherein the adherence of metallic residues on the surface of the rolls is avoided.
  • a rolling unit for rolling metal stock comprising the combination of a plurality of rolls arranged for rotation about respective mutually inclined axes, the rolls each having a transverse plane normal to the respective axis and the transverse planes being inclined to one another and converging toward a common rolling axis along which the metal stock advances; mounting and drive means for maintaining and rotating the rolls; biasing means surrounding the rolls and the mounting and drive means, the biasing means including an inner biasing portion surrounding the common rolling axis, the rolls having peripheral portions projecting into the inner biasing portion and defining therewith a first fluid path, and the biasing means further including an outer biasing portion surrounding the remainder of said rolls and-the mounting and drive means and defining therewith a second fluid path; sealing means associated with each of the rolls and operative for sealing the first fluid path from the second fluid path; feed means operative for continuously circulating a pressurized cooling and lubricating fluid in the first path, and for continuously circulating a pressurized cooling and lubric
  • the rolling unit with a first circulation system for a pressurized cooling and lubricating fluid which constantly surrounds the surfaces of the rolling cylinders while the same act upon the metal stock, the surfaces of the entrance and exit guide members for the metal stock, and the surface of the metal stock itself, and with a second system for a second fluid which lubricates and cools the driving and supporting elements of the rolling unit.
  • the first circulation system for the cooling and lubricating liquid which latter is usually an emulsion of oil in water serves to thoroughly surround the entire periphery of the rolls, of the guide members and of the metal stock from the entrance to the exit of the rolling unit with the cooling and lubricating fluid at a pressure which is adjustable independently of the pressure of fluid in the second system.
  • the pressure of this fluid serves to counteract adherence between the surfaces of the rolling cylinders and the surfaces of the hot stock which is worked by the rolling cylinders as well as adherence between the guide members and the metal stock.
  • the independent adjustment of fluid pressure permits precise control of lubrication and cooling in dependence upon given local requirements.
  • My invention also affords protection to the stock against being contracted by the external air, in that the stock traverses the entire rolling mill completely immersed in the lubricating and cooling fluid.
  • FIG. 1 shows in cross-section an embodiment of a rolling unit incorporating my invention
  • FIG. 2 is a view similar to FIG. 1, and illustrates the circulation of fluids within the rolling unit shown in FIG. 1.
  • FIG. 3 is a view similar to FIG. 1 but illustrating another embodiment of a rolling unit incorporating my invention
  • FIG. 4 is a view similar to FIG. 2, and illustrates the circulation of fluids within the rolling unit shown in FIG. 3;
  • FIG. 5 is a longitudinal cross-section through a rolling mill comprising two rolling units which respectively correspond to those of FIGS. 1 and 3.
  • FIGS. 1 and 2 DESCRIPTION OF THE PREFERRED EMBODIMENTS Discussing firstly FIGS. 1 and 2, it will be seen that the rolling mill in its entirety is generally identified with reference numeral 1. In its basic features it corresponds to the unit disclosed in my US. Pat. No. 3,142,208, to which reference may be had.
  • Each of the three rolling cylinders 9, and 11 is provided with a pair of ring-shaped gaskets or packings 50 and 51 at both axial sides and these gaskets or packings are so dimensioned as to be positioned radially inward from the outer periphery of respective rolls 9, 10 and 11.
  • the gaskets 50 and 51 cooperate with the main housing 3 and the auxiliary housing 2, 4, 14, 15 to seal the inner chamber 7 from the outer chamber 8 so that oil or other liquid can flow through the former without escaping therefrom to the latter.
  • the flow path for the liquid which lubricates and cools the rolls 9, 10 and 11 is shown by solid-line arrows in FIG. 2, and the spaces filled with such liquid are indicated by the small circles in that figure. It will be seen that the liquid enters the rolling unit through an opening 19 at the top of the housing and flows over the peripheral portion of the roll 10 toward the rolling axis 6 along which the stock 106 moves.
  • the other stream flows over the peripheral portion of the roll 11 and out the opening 20'
  • the rate at which the oil issues from the outlets 20 and 20 can be controlled by the valves 53 and 54 associated with the respective outlets, and thus the pressure of the oil within the housing can be varied simply by adjusting the rate at which it issues from the respective outlets.
  • Both the valves 53 and 54 may be of any conventional type well known in the art.
  • the driving mechanism for the rolls 9, 10 and 11 is lubricated and cooled by liquid, usually oil, which flows through the outer chamber 8.
  • liquid usually oil
  • the pressure and flow path of this oil is indicated by dotted areas and dashed-line arrows in FIG. 2.
  • This second stream of oil enters at a pair of openings 29 and 30 provided in the top of the housing and fills the spaces around the drive shaft 12 which drives the rolls 9, 10 and 11, and around the gears and bearings associated with this shaft 12.
  • the shafts 21 and 22, on which the rolls 9 and 11 are mounted for rotation, are hollow at their centers so that the oil of this second stream flow through these shafts to reach the outlet openings 31 and 32.
  • the oil also fills the spaces around the gears and bearings associated with the shafts 21 and 22 as is evident from FIG. 2.
  • the path which is provided for the oil through the inner chamber 7 permits a free flow of cooling liquid than the path which is provided for the liquid which serves to lubricate the driving mechanism.
  • the liquid flowing through the inner chamber 7 is capable of dissipating more heat than would otherwise be the case.
  • FIGS. 3 and 4 the rolling unit shown therein is similar to that of FIGS. 1 and 2, except that the drive shaft 12A is located below the rolling axis.
  • the same reference characters as in FIGS. 1 and 2 have been used for corresponding parts, with the addition of the suflix A. A detailed description of the construction shown in FIGS. 3 and 4 is therefore not necessary.
  • the lubricating and cooling liquid moves in FIGS. 3 and 4 in paths different from those of FIGS. 1 and 2.
  • the liquid enters via the input duct 61 and fills the spaces around the shafts 21A and 22A, then flows through the hollow centers of these shafts so as to surround the drive shaft 12A, and is finally discharged to the exterior by means of the passages 64 and 65 which communicate with the outlet duct 66.
  • the second stream of cooling and lubricating liquid enters in two streams through the inlet ducts 62 and 63, fiows over the peripheral portions of the rolls 9A and 11A, and then around the rolling axis 6A and the stock 106A to be rolled. Thereupon, the two streams are united and form a single stream that flows around the roll 10A and issues through the outlet port 67, whose rate of throughput is controlled by the valve 68 of conventional design. This valve 68 can also be replaced by a calibrated hole if desired.
  • FIG. 5 I have illustrated a rolling mill comprising two rolling units 1 and 1A of which one is of the type disclosed in FIG. 1, while the other is of the type disclosed in FIG. 3.
  • the metal stock to be rolled, in form of elongated bars, ingots or the like, is indicated with reference numerals 106 and 106A, respectively, in accordance with the identical reference numerals used in FIGS. 1 and 3.
  • the rolling units 1 and 1A are arranged side-by-side and that the metal stock, which moves towards the right in FIG. 5, enters the rolling unit 1 through the inlet duct 69 thereof. It passes through the 'unit 1, leaving the same through the outlet duct 70, and
  • FIG. 5 clearly indicates that the stock 106/106A is immersed in cooling and lubricating liquid during its entire passage through the rolling mill, that is from the time it enters the inlet duct 69 of unit 1 until it leaves the unit 1A through the outlet duct 72 thereof.
  • This is possible because some of the cooling and lubricating liquid entering the units 1 and 1A through the liquid-inlet passages 19 and 61, respectively, will be discharged from the inlet and outlet ducts 6972, as shown in FIG. 5.
  • the juxtaposed ducts 70 and 71 these are slightly spaced so that some of the liquid can issue from the gap therebetween.
  • this constant immersion of the stock is to protect the same from contact with the ambient atmosphere, and at the gap between the ducts 70 and 71 such protection is assumeddespite the presence of the gapby the fact that the stream of liquid will issue in opposite directions from the ducts 70 and 71, impacting one another with gap and providing a constant protective mantle for the stock passing through this gap.
  • the internal cross-section of the inlet ducts 69 and 71 is convergent in direction of movement of the stock 106/106A to provide for enhanced guidance of the stock into the interior of the respective rolling unit.
  • the fact that the cross-section diverges in outward direction provides for less restricted flow of liquid and enhances the sealing action against the intrusion of ambient atmosphere. It is primarily for this latter reason that the inner cross-section of the outlet ducts 70 and 72 diverges in direction of movement of the stocks 106/106A.
  • FIG. 5 shows a rolling mill which includes two of the rolling units herein discussed, it will be evident that such a mill may include any desired number of such rolling units, and that the arrangement and selection of the particular type of unit or units employed is formed only by the requirements which one made in a specific application.
  • a rolling unit for rolling metal stock comprising the combination of a plurality of rolls arranged for rotation about respective mutually inclined axes, said rolls each having a transverse plane normal to the respective axis and said transverse planes being inclined to one another and converging towards a common rolling axis along which the metal stock advances; mounting and drive means for mounting and rotating said rolls; housing means surrounding said rolls and said mounting and drive means, said housing means including an inner housing portion surrounding said common rolling axis, said rolls having peripheral portions projecting into said inner housing portion and defining therewith a first fluid path, and said housing means further including an outer housing portion surrounding the remainder of said rolls and said mounting and drive means and defining therewith a second fluid path; sealing means associated with each of said rolls and operative for sealing said first fluid path from said second fluid path; feed means operative for continuously circulating a pressurized cooling and lubricating fluid in said first path in contact with said peripheral portions of said rolls, and for continuously circulating a pressurized cooling and lubricating fluid in said second path in con tac
  • a rolling unit as defined in claim 1, wherein said regulating means comprises valve means installed in the respective paths and operative for regulating the pressure of fluid in one path independent of the pressure of fluid in the other path.
  • valve means comprises a pair of throttle valves each associated with one of said fluid paths.
  • sealing means comprises a pair of sealing gaskets associated with each of said rolls and being in sealing engagement with the same and with said inner housing portion for fluid tightly sealing said first fluid path from said second fluid path.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US706378A 1967-03-29 1968-02-19 Rolling mill Expired - Lifetime US3552164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1430667 1967-03-29

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US3552164A true US3552164A (en) 1971-01-05

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US (1) US3552164A (pl)
AT (1) AT289015B (pl)
BE (1) BE709808A (pl)
CH (1) CH469516A (pl)
FR (1) FR1551705A (pl)
GB (1) GB1202792A (pl)
NL (1) NL6801336A (pl)
PL (1) PL69887B1 (pl)
SE (1) SE351373B (pl)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699791A (en) * 1971-06-28 1972-10-24 Blaw Knox Foundry Mill Machine Work roll bearing lubrication arrangement
US3756051A (en) * 1972-03-22 1973-09-04 Budd Co Lubricating system for metal forming die
US3793869A (en) * 1971-03-17 1974-02-26 W Hufnagl Rolling deformation of wires and similar elongated elements
US3805568A (en) * 1971-11-17 1974-04-23 I Properzi Device for conveying the cooling and lubricating fluid in multi-stand rolling mills for the production of metal bars and wire
US3810371A (en) * 1971-02-20 1974-05-14 I Properzi Hot rolling method for obtaining wire rod
US3985011A (en) * 1975-09-12 1976-10-12 Western Electric Company, Inc. Continuous extrusion
CN101941020B (zh) * 2009-07-07 2012-04-25 邵阳市通达汽车零部件制造有限公司 活塞杆精轧装置及其加工工艺
US20130174630A1 (en) * 2010-06-18 2013-07-11 The University Of Queensland Method and Apparatus for Forming the Profile of Deformable Materials and Deformable Tubular Sections
EP4327955A1 (en) * 2022-08-22 2024-02-28 Balak Coatings nv Method for drawing, straightening and cutting steel wire into bars
CN118492087A (zh) * 2024-07-22 2024-08-16 太原理工大学 无缝金属复合管三辊斜轧机的导板位姿调整装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920398A1 (de) * 1979-05-19 1980-11-20 Kocks Technik Walzblock zum warmwalzen von draht oder staeben
JPS5630023A (en) * 1979-08-15 1981-03-26 Kobe Steel Ltd Electrically lubrication reinforced plastic working method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810371A (en) * 1971-02-20 1974-05-14 I Properzi Hot rolling method for obtaining wire rod
US3793869A (en) * 1971-03-17 1974-02-26 W Hufnagl Rolling deformation of wires and similar elongated elements
US3699791A (en) * 1971-06-28 1972-10-24 Blaw Knox Foundry Mill Machine Work roll bearing lubrication arrangement
US3805568A (en) * 1971-11-17 1974-04-23 I Properzi Device for conveying the cooling and lubricating fluid in multi-stand rolling mills for the production of metal bars and wire
US3756051A (en) * 1972-03-22 1973-09-04 Budd Co Lubricating system for metal forming die
US3985011A (en) * 1975-09-12 1976-10-12 Western Electric Company, Inc. Continuous extrusion
CN101941020B (zh) * 2009-07-07 2012-04-25 邵阳市通达汽车零部件制造有限公司 活塞杆精轧装置及其加工工艺
US20130174630A1 (en) * 2010-06-18 2013-07-11 The University Of Queensland Method and Apparatus for Forming the Profile of Deformable Materials and Deformable Tubular Sections
AU2011267770B2 (en) * 2010-06-18 2017-02-02 The University Of Queensland Method and apparatus for forming the profile of deformable materials
US9676018B2 (en) * 2010-06-18 2017-06-13 The University Of Queensland Method and apparatus for forming the profile of deformable materials and deformable tubular sections
EP4327955A1 (en) * 2022-08-22 2024-02-28 Balak Coatings nv Method for drawing, straightening and cutting steel wire into bars
BE1030793B1 (nl) * 2022-08-22 2024-03-18 Balak Coatings Nv Werkwijze voor het trekken, richten en knippen van staaldraad tot spijlen
CN118492087A (zh) * 2024-07-22 2024-08-16 太原理工大学 无缝金属复合管三辊斜轧机的导板位姿调整装置及方法

Also Published As

Publication number Publication date
BE709808A (fr) 1968-05-30
FR1551705A (fr) 1968-12-27
GB1202792A (en) 1970-08-19
NL6801336A (pl) 1968-09-30
CH469516A (it) 1969-03-15
PL69887B1 (en) 1973-10-31
AT289015B (de) 1971-03-25
SE351373B (pl) 1972-11-27

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