US3648827A - Cooling bed for billets - Google Patents

Cooling bed for billets Download PDF

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Publication number
US3648827A
US3648827A US18630A US3648827DA US3648827A US 3648827 A US3648827 A US 3648827A US 18630 A US18630 A US 18630A US 3648827D A US3648827D A US 3648827DA US 3648827 A US3648827 A US 3648827A
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US
United States
Prior art keywords
rack
teeth
billets
tooth
movable
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
US18630A
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English (en)
Inventor
Karl Gipperich
Egon Sippel
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.)
Schloemann AG
Original Assignee
Schloemann 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
Priority claimed from DE19691913253 external-priority patent/DE1913253C3/de
Application filed by Schloemann AG filed Critical Schloemann AG
Application granted granted Critical
Publication of US3648827A publication Critical patent/US3648827A/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
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
    • B21B43/02—Cooling beds comprising rakes racks, walking beams or bars

Definitions

  • ABSTRACT A cooling bed for billets has a fixed toothed rack, a movable toothed rack and means for upwardly displacing the movable toothed rack for a normal position below the fixed toothed rack to engage a billet portioned between first and second teeth of the first rack and displace the billet causing it to pivot about the tip of the second toothand move between the second tooth and a third tooth, the fixed rack at least partially supporting the billet during the operation.
  • the pitch of the teeth of the movable rack is double that of the teeth of the fixed rack.
  • the invention relates to a cooling bed for billets, the cooling bed comprising toothed racks for supporting and conveying billets. At least one of the racks is fixed and at least one of the racks is movable and arranged so that in conveying the billets rotate about their longitudinal axis which extends substantially perpendicular to the direction of conveying.
  • a previous cooling bed comprised two conveyor racks which were caused to move vertically relatively to each other; each of the racks had teeth provided with hollows or recesses adjacent the tips and the bases of the teeth to hold the slabs or billets. The edges of the billets are held in these recesses during transport, so that the center of gravity of the billets only undergoes a slight vertical movement.
  • Each rack unit had to be provided with its own vertical drive system. Since each unit must be able to carry the billets alone, each must be provided with a necessary minimum number of racks. This all results in high construction costs.
  • a rack-type cooling bed having a fixed and a movable rack unit has been used; the movable rack unit is conveyed on a closed track.
  • the teeth surfaces on the movable rack(s) are made steeper than those of the fixed rack(s).
  • the whole weight of the billets has from time to time to be borne by the moving racks, so that a number of racks has to be provided to ensure sufiicient support.
  • the moving racks need to perform two lifting movements.
  • upstream and downstream relate to the direction of travel of the billets on the cooling bed.
  • upstream flank of a tooth is that flank facing towards the inlet end of the cooling bed and the downstream flank of a tooth is that flank facing towards the discharge end of the cooling bed; likewise an upstream tooth is nearer the inlet end of the cooling bed than a downstreamtooth.
  • a cooling bed for billets comprising a movable and a fixed rack
  • each rack having teeth for engaging a billet, the pitch of the teeth on the movable rack being not less than the pitch of the teeth on the fixed rack, and the movable rack being arranged to engage a billet supported on thefixed rack between first and second teeth of the fixed rack, and to displace the billet to cause the billet to pivot about the tip of the second tooth and move between the second tooth and a third tooth, the billet being at least partially supportedby the fixed rack throughout the operation.
  • the invention can provide a rack-typecooling bed having fixed and movable supporting racks,.in which a large proportion of the weight of the billets is continuously borne by the fixed racks. This can largely prevent billets sliding on the flanks or surfaces of the teeth.
  • the billets are-thus tilted over the tips, of the fixed racks and the movable racks can be designed to bear only a maximum of half the weight of the billets. This can reduce the number of movable racks required compared with .a cooling bed in which the movable racks have to be able to withstand the full weight of the billets, even though only briefly.
  • a further advantage of the invention canbe that the movement of the billets in their longitudinal directions, which occurs in the case of a jolting rack conveyor, can be avoided.
  • the pitch of the teeth in the movable rack is double the pitch of the teeth in the fixed rack.
  • the movable racks can be arranged so that the billets are displaced by vertical movement only of the movable rack.
  • the angle between adjacent surfaces of adjacent teeth in the fixed rack is not less than 90.
  • two movable racks when the pitch of the teeth in the movable rack is double that in the fixed rack, two movable racks can be used, the movable racks being 180 out of phase with each other i.e.,.shifted relatively to each other by the pitch of the fixed rack; billets are moved by alternating upward strokes of these two movable racks.
  • the number of movable racks can be reduced, as all the movable racks are arranged in phase, and are connected to operating means such that the billets are advanced over one tooth of the fixed rack by one upward movement of the movable rack, and the movable racks are lowered and shifted horizontally through (i.e., the pitch of the teeth in the fixed rack) so that a further upward movement of the movable racks further advances the billets.
  • the flanks of the teeth in the movable rack preferably meet at an angle of at the bases of the teeth when billets of rectangular cross section are to be conveyed; preferably at least the lower portions of the flanks of the teeth arranged to receive the downstream sides of the billets (i.e., the lower portions of the upstream flanks of the teeth) extend parallel to the corresponding flanks of the teeth of the fixed rack, the upper portions of these flanks of the teeth of the movable racks preferably extending approximately vertically. At'least the upper portions of the flanks of the teeth of the movable rack which face in the opposite direction (i.e., the upper portions of the downstream flanks) may extend parallel to the corresponding flanks of the teeth of the fixed rack.
  • the racks may be made suitable for use with billets of a different thickness by providing both the fixed and movable racks with a number of sets of teeth suitable for different billet widths which may be brought into working position as required. It is particularly advantageous fora number of sets of rack teeth to be arranged on a shaft associated with a pivot drive.
  • FIG. l is a cooling bed having a fixed and a movable rack unit
  • FIG. 2 is a cross-sectional view of the cooling bed shown in FIG. 1;
  • FIGS. 3 to 6 are various stages of the tipping or conveying process.
  • a cooling bed for billets 1 is composed of a system of fixed racks 2, which are connected to a base 5 of the bed by means of crossbeams 3 and vertical supports 4, and a system of movable racks 6.
  • the movable racks are grouped in threes on longitudinal members 7 which abut on the base 5 through elbow levers 8a, 8b and 9a, 9b.
  • the elbow levers 8a, 8b and 9a, 9b are connected together through joints 10, 11, distancing members .12 ensuring that they are held in a parallel position permanently.
  • the joints 11 are connected'by means of hydraulic cylinders 13 to pistons 14 and piston'rods 15. Alternating actuationof the piston 14 may then produce a vertical movement of the racks 6.
  • the billets 1 are transferred from a chute ,18 to the cooling bedby means of elbow levers 8b acting through rods 16 on offtake segments 17 and drop crossways on in the gaps between the teeth onthe fixed racks.
  • the flanks orteeth surfaces 19 of the teeth in the fixed racks 1 form an angle of more than 90.
  • the pitch of the teeth in the movable racks 6 is double that of the teeth in thefixed racks 1.
  • the pistons 14 of the cylinders 13 are actuated towards the outside, causing the elbow levers 8a, 8b and 9a, 9b to be straightened and the movable racks 6 to be raised.
  • the teeth 20 of the movable racks 6 then grip below the lower edge of the billets 1 (FIG. 3) and tip it over the tips 21 of the teeth on the fixed racks (FIG. 4) into the next trough (FIG. 5).
  • the downstream flanks 22 of the teeth on the movable racks 6 mergeinto .a steeper lower portion 23 which forms an angle of 90 with the following (upstream) tooth flank 24.
  • thebillets are thus tipped forwards to the following tooth flank 25 of a tooth in the fixed rack, their center of gravity thus, being shifted forward in the direction of transport (FIG. 6).
  • the flanks 24 of the teeth on the movable racks 6 merge near the tip of the teeth into a vertically extending portion 26.
  • the movable racks 6 Offtake segments 31, actuated through rods 30 by the levers 10 8b are provided at the output end of the cooling bed and serve to transfer the billets, which have cooled down uniformly, on to a conveyor 32.
  • a cooling bed for cooling billets comprising:
  • each tooth being provided with an upstream flank, a downstream flank and a tip, said flanks having a length approximately equal to half the thickness of the billets;
  • the movable rack having upwardly projecting teeth with a trough between adjacent teeth, the pitch of the teeth of the movable rack being substantially double the pitch of the teeth of the fixed rack;
  • a cooling bed as claimed in claim I wherein the means for moving the movable rack substantially vertically upwards and for moving the movable rack downwards moves the movable rack substantially vertically downwards.
  • a cooling bed as claimed in claim I wherein adjacent portions of the upstream and downstream flanks of adjacent teeth of the movable rack are inclined to one another at an angle of substantially at the base of the flanks, at least the lower portion of the upstream flank extending parallel to the corresponding flank of a tooth of the fixed rack and at least the upper portion of the downstream flank, which upper portion terminates at the tip of the respective tooth, extending parallel to the corresponding flank of a tooth of the fixed rack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Conveyors (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Continuous Casting (AREA)
  • Transmission Devices (AREA)
US18630A 1969-03-15 1970-03-11 Cooling bed for billets Expired - Lifetime US3648827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691913253 DE1913253C3 (de) 1969-03-15 Kühlbett zum Kühlen und gleichzeitigen Querfördern von Walzgut, insbesondere von Knüppeln vierkantigen Querschnittes

Publications (1)

Publication Number Publication Date
US3648827A true US3648827A (en) 1972-03-14

Family

ID=5728254

Family Applications (1)

Application Number Title Priority Date Filing Date
US18630A Expired - Lifetime US3648827A (en) 1969-03-15 1970-03-11 Cooling bed for billets

Country Status (3)

Country Link
US (1) US3648827A (enrdf_load_stackoverflow)
FR (1) FR2038925A5 (enrdf_load_stackoverflow)
GB (1) GB1233875A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074815A (en) * 1975-02-18 1978-02-21 Demag Aktiengesellschaft Turn-over cooling bed for bar-shaped rolled material, particularly billets
DE3631483A1 (de) * 1985-10-03 1987-04-09 Krupp Polysius Ag Antriebseinrichtung fuer einen schubrostkuehler
US4750604A (en) * 1985-10-25 1988-06-14 Hydraroll Limited Mechanical handling apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8411014D0 (en) * 1984-04-30 1984-06-06 Hulbritt Dev Ltd Article handling

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566104A (enrdf_load_stackoverflow) *
US1441042A (en) * 1921-04-29 1923-01-02 George E Thackray Cooling bed
US2983498A (en) * 1958-10-09 1961-05-09 Macgregor Brothers Conveying apparatus
US3160287A (en) * 1961-05-31 1964-12-08 Davy & United Eng Co Ltd Apparatus for inspecting objects

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566104A (enrdf_load_stackoverflow) *
US1441042A (en) * 1921-04-29 1923-01-02 George E Thackray Cooling bed
US2983498A (en) * 1958-10-09 1961-05-09 Macgregor Brothers Conveying apparatus
US3160287A (en) * 1961-05-31 1964-12-08 Davy & United Eng Co Ltd Apparatus for inspecting objects

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074815A (en) * 1975-02-18 1978-02-21 Demag Aktiengesellschaft Turn-over cooling bed for bar-shaped rolled material, particularly billets
DE3631483A1 (de) * 1985-10-03 1987-04-09 Krupp Polysius Ag Antriebseinrichtung fuer einen schubrostkuehler
US4750604A (en) * 1985-10-25 1988-06-14 Hydraroll Limited Mechanical handling apparatus

Also Published As

Publication number Publication date
FR2038925A5 (enrdf_load_stackoverflow) 1971-01-08
DE1913253B2 (de) 1977-03-17
GB1233875A (enrdf_load_stackoverflow) 1971-06-03
DE1913253A1 (de) 1970-10-01

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