US3566951A - Method of equalizing stresses in the conveyance and guidance of continuous castings - Google Patents

Method of equalizing stresses in the conveyance and guidance of continuous castings Download PDF

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Publication number
US3566951A
US3566951A US708076A US3566951DA US3566951A US 3566951 A US3566951 A US 3566951A US 708076 A US708076 A US 708076A US 3566951D A US3566951D A US 3566951DA US 3566951 A US3566951 A US 3566951A
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US
United States
Prior art keywords
rollers
driven
path
castings
torque
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
US708076A
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English (en)
Inventor
Hans Schrewe
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Application granted granted Critical
Publication of US3566951A publication Critical patent/US3566951A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • the invention relates to a method of conveying and guidance of metal castings from continuous casting devices, wherein the conveyor and support rollers are driven.
  • the casting after leaving the mold, is guided by support rollers and carried off by driven conveyor rolls through the roller stand.
  • the conveyor rolls engage the casting after it has solidified throughout.
  • any number of support rollers, disposed vertically, may additionally be driven.
  • Bending also can be carried out in multiple steps on castings whose core is still liquid, whereas they are straightened after solidification in a single step. Deformation occurs by the action of the supporting rollers which are disposed on a curved path, through which the casting is pulled with the aid of the driven conveyor rolls. In a device of this kind, the support rollers also may be driven.
  • the casting cast in an arched or curved mold, is straightened in multiple steps while its core still is in liquid form.
  • the casting is shaped within the support roll frame whose rollers are aligned in a path consisting of a plurality of arcs of increasing diameter.
  • the support rollers may be driven, either all or a part thereof, in order to relieve the conveyor rolls. It also is feasible with such a device to convey the castings by means of the support rollers.
  • one or more rollers are driven at a higher torque than the subsequent roller or rollers.
  • a roller pair may be drive.
  • at least one of the rollers, disposed at the start of said shaping path or shortly before it, is driven at higher torque.
  • the rollers disposed in the break of the curve may be driven at equal or higher torque than the subsequent rollers.
  • the torques of the driven rollers may decrease in the direction of the travel of the casting. Thereby, several rollers following each other may constitute a group of equal torque,
  • FIG. 1 is an elevation of a vertical path for bars
  • FIG. 2 is an elevation of a curved path.
  • casting 2 cast in mold 1 and partly solidified, is conducted through a set of support rollers 3.
  • the latter idle, i.e., are not driven. They serve to guide casting 2 and to avert bellying or bulging of the skin which at that point is still rather thin.
  • Driven conveyor or guidance rolls, respectively, 4 follow support rollers 3 and transport casting 2 from mold 1 through support rolls 3 at a speed which corresponds to their circumferential speed.
  • At least one of the first support rollers 3 in the travelling path is to be driven at higher torque than the succeeding rollers.
  • casting 2 leaving mold 1 first follows the direction determined by the shape of the mold, and then is straightened in the support roll stand while its core is still in liquid state.
  • Support rollers 3 are disposed on a guide path which consists of a plurality of arcs of increasing radius, as indicated by r r r and r in the draw ing, in whose breaks the support rollers 3' are situated.
  • further rollers or roller pairs 3 may be driven.
  • the rollers When slabs are cast, the rollers must absorb not only the bending forces but also additional compressive forces because, in contrast to round, square or rectangular castings, the shell of the slab-shaped castings bulges or bellies more strongly and rests against the rollers.
  • the invention successfully is employed, aside from the, straight and curved paths, in circular plants or in those which bend and straighten, particularly when shaping of the casting is carried out while the core still is in liquid shape. It is applicable in any and every plant where the supported length and .width of the casting is very great.
  • a method of conveying and guiding metal castings from a mold in a continuous casting plant provided with a travelling path for said castings and driven conveyor and support rollers along said path which comprises imparting to at least one of said support rollers at the start of said path a torque which is higher than that of the subsequent rollers so as to equalize occurring tensile stresses with compressive strains and prevent the occurrence of surface cracks in said castings.
  • rollers are disposed in pairs opposite each other along said path; at least one of said pairs at the start of said path being driven at higher torque than the succeeding pairs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Continuous Casting (AREA)
US708076A 1967-02-24 1968-02-26 Method of equalizing stresses in the conveyance and guidance of continuous castings Expired - Lifetime US3566951A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0072880 1967-02-24

Publications (1)

Publication Number Publication Date
US3566951A true US3566951A (en) 1971-03-02

Family

ID=7314722

Family Applications (1)

Application Number Title Priority Date Filing Date
US708076A Expired - Lifetime US3566951A (en) 1967-02-24 1968-02-26 Method of equalizing stresses in the conveyance and guidance of continuous castings

Country Status (7)

Country Link
US (1) US3566951A (en。)
AT (1) AT275775B (en。)
BE (1) BE710884A (en。)
ES (1) ES350835A1 (en。)
FR (1) FR1554433A (en。)
GB (1) GB1218987A (en。)
SE (1) SE328971B (en。)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645323A (en) * 1969-01-21 1972-02-29 Mannesmann Ag Roll system for continuous casting machines
US3752210A (en) * 1971-08-24 1973-08-14 Steel Corp Method for controlling forces on a strand as it solidifies
US3861456A (en) * 1971-08-24 1975-01-21 United States Steel Corp Mechanism for controlling forces on a strand as it solidifies
US3918514A (en) * 1973-03-15 1975-11-11 Allis Chalmers Method of bending or straightening a continuously cast metal strand with controlled cooling
US4612971A (en) * 1978-07-28 1986-09-23 Kennecott Corporation Method and apparatus for the continuous production of strip using oscillating mold assembly
US4736789A (en) * 1978-07-28 1988-04-12 Kennecott Corporation Apparatus and method for continuous casting of metallic strands at exceptionally high speeds using an oscillating mold assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030575B1 (en。) * 1970-01-29 1975-10-02

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645323A (en) * 1969-01-21 1972-02-29 Mannesmann Ag Roll system for continuous casting machines
US3752210A (en) * 1971-08-24 1973-08-14 Steel Corp Method for controlling forces on a strand as it solidifies
US3861456A (en) * 1971-08-24 1975-01-21 United States Steel Corp Mechanism for controlling forces on a strand as it solidifies
US3918514A (en) * 1973-03-15 1975-11-11 Allis Chalmers Method of bending or straightening a continuously cast metal strand with controlled cooling
US4612971A (en) * 1978-07-28 1986-09-23 Kennecott Corporation Method and apparatus for the continuous production of strip using oscillating mold assembly
US4736789A (en) * 1978-07-28 1988-04-12 Kennecott Corporation Apparatus and method for continuous casting of metallic strands at exceptionally high speeds using an oscillating mold assembly

Also Published As

Publication number Publication date
BE710884A (en。) 1968-07-01
SE328971B (en。) 1970-09-28
AT275775B (de) 1969-11-10
GB1218987A (en) 1971-01-13
ES350835A1 (es) 1969-05-16
FR1554433A (en。) 1969-01-17

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