US3360974A - Apparatus for treating metal - Google Patents

Apparatus for treating metal Download PDF

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Publication number
US3360974A
US3360974A US446223A US44622365A US3360974A US 3360974 A US3360974 A US 3360974A US 446223 A US446223 A US 446223A US 44622365 A US44622365 A US 44622365A US 3360974 A US3360974 A US 3360974A
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US
United States
Prior art keywords
rolls
mill
roll
rolling
work
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
US446223A
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English (en)
Inventor
William T Purvance
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Priority to US446223A priority Critical patent/US3360974A/en
Priority to DE19661527730 priority patent/DE1527730A1/de
Priority to GB13885/66A priority patent/GB1138857A/en
Priority to ES0324972A priority patent/ES324972A1/es
Priority to BE679007D priority patent/BE679007A/xx
Priority to AT328466A priority patent/AT278689B/de
Priority to FR56610A priority patent/FR1474631A/fr
Priority to NL6604761A priority patent/NL6604761A/xx
Application granted granted Critical
Publication of US3360974A publication Critical patent/US3360974A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B21B2201/00—Special rolling modes
    • B21B2201/18—Vertical rolling pass lines

Definitions

  • ABSTRACT OF THE DISCLOSURE A rolling mill adapted to perform drastic reduction of metal work of 50% or more in a single pass from ingot and billet sizes which includes a nest of four work rolls having axes at right angles to each other and which form a fully confined pass for the Work. Each roll is motordriven and is supported in its oWn housing and an adjacent housing. The mill also contains removable capping means for each roll which maintain the roll shafts in the mill housing and can be removed for roll replacement.
  • This invention relates to an apparatus for treating metal. More particularly, the invention relates to a rolling mill especially useful for drastically reducing the cross-section of steel shapes. Of particular benefit, is the use of the apparatus in so-called single pass rolling of closely controlled cross-sectional areas. In such rolling processes, the metal is brought to the desired cross-sectional area in a single pass through the rolling mill.
  • the invention is particularly adaptable to processing continuously cast steel, although it is also useful and adaptable to conventional rolling of shapes in vertical or horizontal rolling mills.
  • the drastic reduction in cross section which is possible with the invention produces a metallurgical structure in the rolled work unlike that which results from conventional rolling practices. That is to say, the product possesses an elongated grain structure more similar to metallurgical structures of extrusions and forgings than of conventionally rolled material.
  • the most common technique is to pour molten metal into a water cooled mold at a closely controlled rate.
  • the shape of the water cooled mold controls the size of the cast steel column.
  • the molten steel at the exterior surface is solidified in the cooling area of the mold and the steel column emerges from the mold, usually in a downward direction.
  • the steel column From the mold, the steel column enters a pair of pinch rolls which control the rate of descent.
  • the pinch rolls contact only two sides of the cast bloom and can only reduce the cross-sectional area to the extent that it is necessary to create enough friction to support the weight of the steel above it.
  • Such rolls cannot be used to substantially reduce the cross-sectional area of the steel because of the unprotected and unsupported areas where the steel would bulge and distort on the sides of the steel column not in contact with the rolls.
  • the present invention avoids the above disadvantages and others by providing a nest of rolls which support and protect the steel column on all sides. Moreover, the design of the novel rolling mill enables it to withstand severe rolling forces and therefore to perform drastic reductions in cross-sectional areas in a single pass.
  • an apparatus which employs four rolls disposed at substantially right angles to each other and with abutting roll faces. In the preferred embodiment, each of the rolls have tapered edges beveled at 45 and are arranged so that adjacent beveled faces abut each other.
  • Each of the rollers are supported by a shaft extending from each end of the roll which in turn rests in and is supported by individual mill housings in a manner to be hereinafter described.
  • the novel design of the mill also permits the rolls to be quickly and easily changed, as needed, with minimum shut-down time.
  • the use of the invention in conjunction with continuous casting permits a large cross-sectional area to be cast in the casting mold, e.g., 24 x 24", and due to the rigidity and strength of the rolling mill as well as its novel design, such large cast shapes may be drastically reduced in a single pass of the metal through it to, for example, a 12" x 12" billet. Because of this ability, two mills of my design, one as a following mill located beneath the first mill, can be used to effectively reduce in a single pass a large cast ingot of, for example 24" x 24", to a billet as small as 4 x 4".
  • my rolling mill besides performing the function of pinch rolls to control the rate of descent and substantial reduction in the size of the cast steel column, also has the effect of equally distributing the heat throughout the cross-sectional area of the bloom and thereby provides a forged or extruded grain type product which is presently obtained only by costly processing.
  • FIGURE 1 is a plan view in horizontal section through the bearings showing an assembly of a nest of rolls in accordance with the invention
  • FIGURE 2 is a sectional view taken along the line IIII of FIGURE 1 showing the arrangement of mill housings and rolls;
  • FIGURE 3 is a sectional view taken along lines III- III of FIGURE 1 showing the arrangement of the housing, roll shafts and bearing inserts;
  • FIGURE 4 is a schematic view of a typical rolling mill in accordance with the invention illustrating how it may be used in continuous casting processes
  • FIGURE 5 is a schematic view showing how the invention can be readily adapted to permit rolling of various shapes.
  • each of the rolls has a primary shaft 15a, 15b, 15c and 15d and a secondary shaft 17a, 17b. 17c and 17d extending from opposite sides of the rolls 13a, 13b, 13c and 13d respectively.
  • a mill housing 19a, 19b, 19c and 19d which supports the primary shaft of that roll.
  • mill housing 19a supports the primary shaft 15a of roll 13a; similarly.
  • mill housing 1% supports the primary shaft 15b of roll 1317, etc.
  • each mill housing is a recess 21a, 21b, 21c and 21d which receives the secondary shaft of an ad jacent roll.
  • mill housing 19a receives in the reccess 21:: the secondary shaft 17d of roll 13a while mill housing 19b receives at 21b the secondary shaft 17a of roll 13a.
  • the secondary shaft 17b is fitted into the recess 210 of mill housing 190 associated with roll 130. Secondary shaft is received by the recess 21d of mill housing 1%.
  • the primary shafts 15a, 15b, 15c and 15d of each of the rolls are preferably independently driven and are equipped with independent but synchronized motor drives.
  • Suitable capping means 25 maintain the roll shafts in the mill housings.
  • the capping means 25 may be a single large cast section; however, in the preferred embodiment comprises a top 27 and inserts 29 which extend into the mill housings to hold the roll shafts in position.
  • the use of separate capping means in this manner permits the rolls to be changed easily by use of an overhead crane which removes the cap and inserts from the mill housing after which the rolls can be removed from the housings and new rolls positioned to replace them.
  • the mill housings 19a, 19b, 19c and 19d may be mounted on conventional housing shoes 18 to which they are attached, as by cap screws 16. In this way, the mill housings are held rigidly in place at the bottom. It will be observed that with the above described design the mill housings are not subjected to any cross strains since all rolling forces are directed in the same manner against housings.
  • the prodnot Upon metallurgical examination of a drastically reduced product produced from this rolling mill, the prodnot will be found to have a greatly elongated grain structure. Moreover, the product will have a greater hardness than conventionally rolled material.
  • the configuration of the working surface of the rolls 13a, 13b, 13c and 13d is made to conform to the desired cross-sectional area of the final product.
  • the faces of the rolls are machined to provide a square product. This is accomplished as shown by using rolls with beveled edges 20 having a 45 taper at the edges of the rolls.
  • the roll shafts a, 15b, 15c and 15d which are supported on bearings 23a, 23b, 23c and 23d, are individually connected with conventional motor drives and couplings to provide the force necessary for the drastic reduction of steel shapes.
  • the bearings which may be of the friction or anti-friction type allow free rolling of the rolls.
  • the nest of rolls which are arranged to provide a fully closed pass for the work form a funnel into which hot steel can be inserted and which emerges at the exit side of the mill with the exact circumference and configuration of the work roll faces.
  • the rolling mill of the invention can be easily adapted to a continuous casting line.
  • two nests of rolls, 30 and 40 which are of the design described in FIGURES 1, 2 and 3, may be positioned as shown in FIGURE 4 to receive a hot poured ingot from mold 35.
  • the primary mill reduces the cross-sectional area of the cast steel column 37.
  • the steel of reduced section 39 leaving primary mill 30 can be passed into a following mill 40 where it emerges with a still smaller cross-sectional area.
  • additional mills can be provided to accomplish further reduction as desired or a single mill may be used if less reduction is needed.
  • the invention may be employed as horizontal rolling mills for blooms, bars, billets or other shapes. This is accomplished in the same manner as heretofore described except that the mill is built for a vertical pass.
  • the working face of the rolls as shown in FIGURE 5, squares, rounds, hexagons or other shapes can be produced.
  • successive mills of this design i.e., following mills, very great reductions of the original work may be performed.
  • work rolls with closely machined edges beveled at and driving the four rolls so they rotate to the center at the same speed friction is minimized. All four rolls may be synchronized in speed through mechanical linkages or electrical circuitry.
  • a rolling mill adapted to perform drastic reduction of metal work of or more in a single pass from ingot and billet sizes such as to produce an elongated grain structure characteristic of extrusions, said mill comprising a nest of four work rolls arranged with their axes at substantially right angles to each other and with abutting roll surfaces forming a fully confined pass for the work, a motor and drive for each work roll, a primary and a secondary shaft extending from opposite sides of each of said work rolls, a mill housing for each work roll supporting the primary shaft of that roll, means within each mill housing a support secondary shaft of an adjacent work roll, and removable capping means associated with each roll for maintaining the roll shafts in the mill housings and which when removed permit replacement of the rolls in the housings.
  • a rolling mill according to claim 1 in which the edges of the rolls are beveled at 45 and the rolls are positioned with abutting beveled surfaces such that together the rolls form a fully confined pass for the work.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
US446223A 1965-04-07 1965-04-07 Apparatus for treating metal Expired - Lifetime US3360974A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US446223A US3360974A (en) 1965-04-07 1965-04-07 Apparatus for treating metal
DE19661527730 DE1527730A1 (de) 1965-04-07 1966-03-29 Walzwerk
GB13885/66A GB1138857A (en) 1965-04-07 1966-03-29 Rolling mill for treating metal
ES0324972A ES324972A1 (es) 1965-04-07 1966-03-31 Perfeccionamientos en la construccion de trenes de laminacion.
BE679007D BE679007A (xx) 1965-04-07 1966-04-04
AT328466A AT278689B (de) 1965-04-07 1966-04-06 Walzwerk
FR56610A FR1474631A (fr) 1965-04-07 1966-04-06 Appareil pour traiter des métaux par laminage
NL6604761A NL6604761A (xx) 1965-04-07 1966-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US446223A US3360974A (en) 1965-04-07 1965-04-07 Apparatus for treating metal

Publications (1)

Publication Number Publication Date
US3360974A true US3360974A (en) 1968-01-02

Family

ID=23771776

Family Applications (1)

Application Number Title Priority Date Filing Date
US446223A Expired - Lifetime US3360974A (en) 1965-04-07 1965-04-07 Apparatus for treating metal

Country Status (7)

Country Link
US (1) US3360974A (xx)
AT (1) AT278689B (xx)
BE (1) BE679007A (xx)
DE (1) DE1527730A1 (xx)
ES (1) ES324972A1 (xx)
GB (1) GB1138857A (xx)
NL (1) NL6604761A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting
US3572078A (en) * 1967-06-29 1971-03-23 North American Rockwell Variable orifice, zero friction draw die
US4074557A (en) * 1975-10-30 1978-02-21 Nippon Steel Corporation Metal extrusion process with high reduction
US4198841A (en) * 1977-07-26 1980-04-22 Barkov Leonid A Roll mill stand
DE2905179A1 (de) * 1979-02-06 1980-10-02 Tscheljabinskij Politekhn I Im Kontinuierliches walzwerk
US5174013A (en) * 1988-06-16 1992-12-29 Nippondenso Co., Ltd. Winding apparatus and method which deforms the wire during winding
US20140124721A1 (en) * 2011-06-22 2014-05-08 Ashley Dean Olsson Post-forming method and apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419775A1 (fr) * 1978-03-18 1979-10-12 Kocks Gmbh Friedrich Train de laminoir pour le laminage de billettes, de barres ou de fils
DE2909380C2 (de) * 1979-03-09 1986-09-25 Čeljabinskij politechničeskij institut imeni Leninskogo Komsomola, Čeljabinsk Mehrwalzengerüst
AT406644B (de) * 1997-11-14 2000-07-25 Voest Alpine Ind Anlagen Präzisionswalzverfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US281978A (en) * 1883-07-24 Rolling-mill
US1788693A (en) * 1926-12-10 1931-01-13 Stuting Heinrich Roll bearings in universal rollin mills
US1994187A (en) * 1933-11-27 1935-03-12 Earl T Bennington Method and apparatus for producing wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US281978A (en) * 1883-07-24 Rolling-mill
US1788693A (en) * 1926-12-10 1931-01-13 Stuting Heinrich Roll bearings in universal rollin mills
US1994187A (en) * 1933-11-27 1935-03-12 Earl T Bennington Method and apparatus for producing wire

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting
US3572078A (en) * 1967-06-29 1971-03-23 North American Rockwell Variable orifice, zero friction draw die
US4074557A (en) * 1975-10-30 1978-02-21 Nippon Steel Corporation Metal extrusion process with high reduction
US4198841A (en) * 1977-07-26 1980-04-22 Barkov Leonid A Roll mill stand
DE2905179A1 (de) * 1979-02-06 1980-10-02 Tscheljabinskij Politekhn I Im Kontinuierliches walzwerk
US5174013A (en) * 1988-06-16 1992-12-29 Nippondenso Co., Ltd. Winding apparatus and method which deforms the wire during winding
US20140124721A1 (en) * 2011-06-22 2014-05-08 Ashley Dean Olsson Post-forming method and apparatus
US9662694B2 (en) * 2011-06-22 2017-05-30 Ashley Dean Olsson Post-forming method and apparatus

Also Published As

Publication number Publication date
AT278689B (de) 1970-02-10
NL6604761A (xx) 1966-10-10
ES324972A1 (es) 1966-12-16
DE1527730A1 (de) 1970-02-19
GB1138857A (en) 1969-01-01
BE679007A (xx) 1966-10-04

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