US3534648A - Shears for parting continuously-cast billets - Google Patents

Shears for parting continuously-cast billets Download PDF

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Publication number
US3534648A
US3534648A US3534648DA US3534648A US 3534648 A US3534648 A US 3534648A US 3534648D A US3534648D A US 3534648DA US 3534648 A US3534648 A US 3534648A
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US
United States
Prior art keywords
billet
shearing
shears
parting
continuously
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
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English (en)
Inventor
Werner Skiera
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Schloemann AG
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Schloemann AG
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Filing date
Publication date
Application filed by Schloemann AG filed Critical Schloemann AG
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Publication of US3534648A publication Critical patent/US3534648A/en
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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
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D21/00—Machines or devices for shearing or cutting tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9411—Cutting couple type
    • Y10T83/9447—Shear type

Definitions

  • the present invention is a shearing mechanism, consisting of a pair of cooperating shear blades adapted for parting a continuously-cast billet of metal, such as steel, while the billet is at a high temperature.
  • the billet emerging from the continuous casting machine passes to a shearing station where it is severed into predetermined lengths which thus pass through a furnace to the roll train of a rolling mill.
  • the billets are ordinarily passed through the furnace to reheat them, and/or to permit the heat they already contain to become more uniformly distributed therein, to facilitate the rolling operation.
  • the shearing is accomplished with straight edged shear blades.
  • the straight edged blades flatten and broaden the severed ends of the billets, so that they will not properly be received through the first rolls of the rolling mill.
  • the billets with broadened ends tend to damage the hearth of the furnace, and to buckle if the distortion prevents the billets from lying flat on the hearth.
  • the ends are trimmed by cutting, and/or the rolls at the entrance of the rolling mill are spaced further apart to receive them.
  • shears in accordance with the present invention which have the lengths of their shearing edges formed with an indented central portion, which is shorter than the width of the billet to be parted, and two end portions diverging respectively from the ends of the central portion.
  • the diverging end portions of the shearing edges which are the first portions of the shearing edges to engage the billet, make bevelled kerfs in the edges of the billet at the start of the cut.
  • the direction of forces producing these bevelled kerfs being in toward the center of the billet, oppose spreading of the billet initially and thereafter as the central portions of the shearing edges shear through the billet to complete the severing.
  • the shearing faces of the end portions of the shearing edge are relief ground; that is, the end portions are bevelled, or sloped, to shear in a plane spaced from the shear plane of the central portions and to displace the sheared material in a direction the reverse of the direction in which material is displaced by the shearing edge of the central portion.
  • the effect of this is that the end portions displace material from the sides of the billet toward the middle just prior to the shearing of the middle, with the result that the billet is sheared without bulging to the sides and without forming stepped cuts across the sheared end faces.
  • FIG. 1 is a side elevation of shearing mechanism, shown schematically and partly broken away, including a pair of cooperatively movable shear blades in accordance with the invention, for parting a continuously-cast billet;
  • FIG. 2 is a front elevation of the mechanism shown in FIG. 1;
  • FIG. 3 is a front view oftlie shear blades, illustrated in FIGS. l and 2, showing them in their relative positions after a bevelled kerf has been started in the edges ofa billet;
  • FIG. 4 is a side view ofthe shear blades shown in FIG. 3;
  • FlGS. 5a and 5b are sections respectively along the lines 5a-5a, and Sb-Sb on FlG. 4.
  • a pair of cooperating shear blades 10a and 10b embodying the present invention are incorporated in shearing mechanism carried on a frame 12.
  • the frame 12 is provided with wheels 13 riding on lateral guides 14, and is moved laterally by a positioning piston and cylinder device 15 attached to the frame for positioning it laterally between rollers 16 and 17, which are part of a roller table ofa continuous-casting machine (not shown) and which support and convey a continuously-cast billet 18 away from the continuous-casting mold (not shown).
  • the frame 12 is provided with rollers 19 and 20, the roller 19 being in line to guide a continuous billet 18, passing over the roller 16, in between the blades 10a and 10b from one side of the shearing mechanism and the roller 20 being in line to guide parted billet sections 1811 out to the roller 17 at the other side of the mechanism.
  • the upper shear blade 10a is fixed in a blade support member 21 on the frame 12.
  • the lower shear blade 10b is mounted on a support carriage 22 that is mounted to be vertically movable in a guide 23 on the frame 12 by a piston rod 24 operated by a hydraulic drive cylinder 25 (or other suitable drive mechanism).
  • a movable hold down clamp 26 is mounted on the blade support number 21 to be moved up and down, for clamping a billet 18 in position to be sheared, by a piston 27 operated by a drive cylinder 28.
  • the blades 10a and 10b are each formed with straight, indented central portions, 30a, 30b respectively, and respective end portions 31a, 31b diverging from the ends of the central portions 30a, 30b.
  • the central portions 30a, 30b are shorter than the width of a billet 18 being sheared so that the end portions 31a, 31b engage the edges of the billet 18 on a slant to form bevelled kerfs therein.
  • the edge portions 31a, 31b are reverse ground with respect to the shear plane defined by the cooperating edges 32a, 32b of the central portions 30a, 30b of the blades 10a, 10b.
  • Shears for parting continuously-cast metal billets comprising a pair of blades mounted to move cooperatively together for shearing a billet placed between them, each of said blades having the length of its shearing edge formed by an indented central portion shorter than the width of said billet and end portions diverging respectively from the ends of the central portion, and the shearing faces of said central portion and of said end portions of the shearing edge being bevelled respectively in opposite directions relative to the plane in which they shear said billet.
  • shears of claim I in which the shearing faces of said end portions are relief ground relative to the shearing edge of the central portion to shear in a plane spaced from the plane in which the central portion shears.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Shearing Machines (AREA)
US3534648D 1967-04-28 1968-04-23 Shears for parting continuously-cast billets Expired - Lifetime US3534648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESC040627 1967-04-28

Publications (1)

Publication Number Publication Date
US3534648A true US3534648A (en) 1970-10-20

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ID=7435777

Family Applications (1)

Application Number Title Priority Date Filing Date
US3534648D Expired - Lifetime US3534648A (en) 1967-04-28 1968-04-23 Shears for parting continuously-cast billets

Country Status (4)

Country Link
US (1) US3534648A (de)
AT (1) AT281559B (de)
FI (1) FI46921C (de)
SE (1) SE329939B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110252934A1 (en) * 2008-10-15 2011-10-20 Van Gemert Gerardus Theodorus Johannes Mobile device and method for the destruction of data carriers
CN103909180A (zh) * 2014-03-12 2014-07-09 长葛市新世纪机电有限公司 钢筋切断机

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110252934A1 (en) * 2008-10-15 2011-10-20 Van Gemert Gerardus Theodorus Johannes Mobile device and method for the destruction of data carriers
US8887605B2 (en) * 2008-10-15 2014-11-18 C.M.G.G. B.V. Device and method for destroying a hard disk
CN103909180A (zh) * 2014-03-12 2014-07-09 长葛市新世纪机电有限公司 钢筋切断机

Also Published As

Publication number Publication date
DE1627275B2 (de) 1972-10-26
FI46921C (fi) 1973-08-10
AT281559B (de) 1970-05-25
FI46921B (de) 1973-05-02
SE329939B (de) 1970-10-26
DE1627275A1 (de) 1970-08-06

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