US3810283A - Apparatus for braking rolled bars to rest on the cooling bed of a bar mill - Google Patents

Apparatus for braking rolled bars to rest on the cooling bed of a bar mill Download PDF

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Publication number
US3810283A
US3810283A US00306821A US30682172A US3810283A US 3810283 A US3810283 A US 3810283A US 00306821 A US00306821 A US 00306821A US 30682172 A US30682172 A US 30682172A US 3810283 A US3810283 A US 3810283A
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US
United States
Prior art keywords
bar
clamping member
rest
brake hold
movable base
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
US00306821A
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English (en)
Inventor
V Churakov
A Lensky
V Ostapenko
A Prazdnikov
I Sidorov
B Khovrin
L Fabrika
J Kovalenko
M Kostjuchenko
A Litvin
G Pobegailo
E Vasiliev
V Egorov
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Individual
Original Assignee
Individual
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 to DE19722254926 priority Critical patent/DE2254926C3/de
Priority claimed from DE19722254926 external-priority patent/DE2254926C3/de
Priority to SE14620/72A priority patent/SE367933B/xx
Application filed by Individual filed Critical Individual
Priority to US00306821A priority patent/US3810283A/en
Priority to FR7244350A priority patent/FR2209617B1/fr
Application granted granted Critical
Publication of US3810283A publication Critical patent/US3810283A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B43/12—Devices for positioning workpieces "flushed", i.e. with all their axial ends arranged in line on cooling beds or on co-operating conveyors, e.g. before cutting
    • 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
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements

Definitions

  • An apparatus comprising a movable base mounted on a support and so arranged that its rear part, in the direction of the bar travel, carries a brake hold-down holding the bar against supporting means whereas on its front part is mounted arresting means clamping the bar between the supporting means and the movable base support, the arresting means being adapted to clamp the tail end of the bar when the latter while while still in forward motion goes out of contact with a clamping member.
  • the invention is aimed at reducing scrap metal losses in lining up the end of rolled bars in a batch prior to their cutting 4 Claims, 3 Drawing Figures PATENTEDMAY 14 mm SHEET 1 0F 2 UYHENTED MAY 14 I974 SHEET 2 BF 2 APPARATUS FOR BRAKING ROLLED BARS TO REST ON THE COOLING BED OF A BAR MILL BACKGROUND OF THE INVENTION
  • This invention relates generally to the production of rolled bar stock and more particularly it relates to an apparatus for braking rolled bars to rest on the cooling bed of a bar mill.
  • An apparatus has previously been proposed for braking rolled bars to rest on the cooling bed of a bar mill comprising a brake hold-down arranged on a movable base mounted on a support, supporting means against which the hold-down presses the bar during its slowing down after it has been kicked off a roller table and traversed to the supporting means, and a drive to make the brake holddown inoperative after the bar has been fully brought to rest (See, for instance, USSR authors certificate No. 155,473, cl. B2lb, 7a, 26/02).
  • This well known apparatus consists of a shoe fastened to a tie rod moving along an arc and pressing by its own weight the bar against a lifting valve with the aid of which the bar is swept off a roller table into a straightening pocket of a cooling bed.
  • the principal object of the present invention is to provide such an apparatus for braking rolled bars to rest on the cooling bed of a bar mill which will make it possible to more efficiently slow down the forward motion of the tail ends of successive bars and ensure stopping of the bar over a shorter stopping distance.
  • an apparatus for braking rolled bars to rest on the cooling bed of a bar mill comprising a brake hold-down arranged on a movable base mounted upon ,support, supporting means against which the bar is held by the brake hold-down during slowing down the forward motion of the bar after it has been thrown off a roller table and has traversed to the supporting means, and a drive to disengage the brake hold-down after the bar has been fully braked to rest.
  • a part of the movable base located from the side of the support functions as arresting means causing the bar to be clamped between the movable base support and the supporting means, the clamping member of the arresting means being located behind the brake hold-down in the direction of the bar travel so that upon disengagement of the brake hold-down from the bar the clamping member of the arresting means is pressed against the latter and thus the bar is braked to rest due to the action of a clamping force arising under the influence of the inertia forces of the bar advancing in a longitudinal direction.
  • the arresting means it is preferable to arrange the arresting means so that during the brake hold-down being kept in contact with the bar, between the clamping member of the arresting means and the bar a clearance is maintained due to which upon disengagement of the brake hold-down from the bar the clamping member of the arresting means comes in contact with the bar whereby providing clamping of the bar tail end by the arresting means between the movable base support and the supporting means against which the bar is pressed during braking thereof to rest.
  • the movable base be provided in the form of a four-bar mechanism the movable portion of which accommodates the brake hold-down and the clamping member of the arresting means thus ensuring stable clamping of the bar tail end by the arresting means within a wide range of bar thicknesses.
  • FIG. 1 is a skeleton diagram of an apparatus for braking rolled bars to rest on the cooling bed of a bar mill illustrating its four operating positions l-IV;
  • FIGS. 2 and 3 show an embodiment of the invention with the apparatus located below the straightening pocket.
  • the apparatus consists of a movable base 1 at the end of which, from the side wherefrom a bar 2 enters (the direction of the bar travel is shown by an arrow), is mounted a brake hold-down having the form of an idle roll 3. On the base 1, behind the brake hold-down in the direction of the bar travel is located a clamping member 4.
  • the movable base 1 is connected by means of a hinge 5 with an adjusting spring mechanism 6 mounted on a support 7 and is also pivotally connected with a displacement drive provided in the form of a piston-type pneumatic cylinder 8.
  • the apparatus for braking rolled bars to rest on the bar mill cooling bed is installed at the beginning of the cooling bed above the first groove of a straightening pocket 9, the surface thereof being used .as supporting means during the bringing of the bar to rest.
  • the apparatus operates as follows. In the starting positin (FIG. 1 I), the movable base 1 with the idle roll 3 and the clamping member 4 is raised by the pneumatic cylinder 8 above the straightening pocket 9. When the bar enters the first groove of the straightening pocket, the cylinder 8 is actuated and the movable base 1 is lowered until the roll 3 comes in contact with the bar 2 which continues its forward travel in the straightening pocket (FIG. 1 II). Thus, the forward motion of the bar begins to be slowed down at a rate proportional to the force of gravity of the movable base 1 and a force exerted upon the bar by the roll 3 operated by the pneumatic cylinder 8. With this braking action the force is transmitted to the bar only via the idle roll 3 since the clamping member 4 does not contact the bar due to a clearance 8 not exceeding the bar thickness.
  • the movable base 1 and the bar get clamped between the straightening pocket and the adjusting spring mechanism 6 which adjusts the clamping force which determines the bar stopping distance.
  • a section of the movable base between the point of contact of the clamping member with the bar and the hinge 5 functions as arresting means.
  • the scatter of the front (tail) ends of successive bars on the cooling bed depends on the stopping distance, therefore a distance between the contact points of the idle roll and the clamping member with the bar should not be greater than a tolerance for cutting the bar end.
  • FIGS. 2 and 3 an embodiment of the invention with the apparatus located below the straightening pocket is shown.
  • the apparatus has idle rolls l0 and 11 with vertical axes of rotation which are used to clamp the bar.
  • the rool I0 is secured to the end of a driven lever 12 connected with a drive for displacing the roll, provided here in the form of a pneumatic cylinder 13.
  • a brake shoe 14 is rigidly fixed.
  • the second idle roll 11 is attached to the end of a bar 16 of four-bar mechanism 17, the bar 16 being parallel to a fixed support 15. At the opposite end of this bar is mounted a block 18 with a clamping member 19.
  • the four-bar mechanism is loaded to compression in the direction of an adjustable stop 20 by a compression spring 21.
  • the apparatus for braking rolled bars to rest is located at the beginning of the cooling bed above the first groove of a straightening pocket 22.
  • the apparatus operates in the following way.
  • the bar 2 enters a run-in table 23 of the cooling bed, and its forward motion begins to be slowed down by throw-off mechanism 24 which via rods 25 lift the bar from the position B to the position C.
  • the bar is transferred into the first groove of the straightening pocket 22.
  • the spring 21 brings the four-bar mechanism 17 against the adjustable stop 20 while the idle roll 11 with the block 18 are brought forward as far as possible in the direction of the valves 24.
  • the driven lever 12 is in its lowered position, whereas the roll 10 and the brake show 14 are in their ambushed position blow the straightening pocket (shown with a dot-anddash line in FIG. 2).
  • the pneumatic cylinder 13 is actuated and turns the driven lever 12 until it rests against a stop 25 thereby positioning the bar 2 between the rolls l0 and 11.
  • the four-bar mechanism turns compressing the spring 21 (shown with a dot-and-dash line in FIG. 3).
  • the bar is braked between the idle rolls at a rate proportional to the compression force of the spring 21.
  • the spring 21 brings the clamping member 19 into contact with the bar.
  • the clamping member is pressed against the bar, the latter and the four-bar mechanism get clamped between the fixed support 15 and the brake shoe 14.
  • the magnitude of the clamping force is controlled by the air pressure in the chamber of the pneumatic cylinder 13 and the force with which the idle rolls are pressed against the bar, by the spring 21.
  • a section of the four-bar mechanism 17 between the point of contact of the clamping member 19 with the bar and a fulcrum point 27 functions as arresting means.
  • the driven lever 12 After stopping of the bar, the driven lever 12 is positioned by the pneumatic cylinder 13 below the straightening pocket.
  • the spring 21 forces the four-bar mechanism against the stop 20 somewhat displacing the bar in the direction of the throw-off valves 24. After the bar has been discharged into the next groove of the straightening pocket, the apparatus is ready to start operation anew.
  • the scatter of the tail (front) ends of rolled bars when using this braking procedure is considerably less than with the application of the well known device mentioned above and does not exceed the distance between the points of contact of the idle roll 3 and the clamping element with the bar 2 being selected in accordance with a tolerance on cutting the bar end.
  • the four-bar mechanism 17 enters the stability of operation of the apparatus within a wide range of bar thickness due to the constant value of the clearance 6 and that of the angle of clamping.
  • An apparatus for braking rolled bars to rest on the cooling bed of a bar mill comprising a movable base mounted on a support; a brake holddown located on said movable base; supporting means against which the bar is held by said brake hold-down during slowing down of the bar forward motion after it has been thrown off a roller table and has traversed to said supporting means; a part of said movable base located from the side of said support and functioning as arresting means causing the bar to be clamped between said support of the movable base and said supporting means, a clamping member of the arresting means being located behind said brake hold-down in the direction of the bar travel so that upon disengagement of the brake hold-down from the bar, the clamping member of the arresting means is pressed against the latter and thus the bar forward movement is slowed down due to the action of a clamping force arising under the influence of the inertia forces of the bar advancing in a longitudinal direction; and drive means for disengaging said brake hold-down.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Metal Rolling (AREA)
US00306821A 1972-11-09 1972-11-15 Apparatus for braking rolled bars to rest on the cooling bed of a bar mill Expired - Lifetime US3810283A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19722254926 DE2254926C3 (de) 1972-11-09 Vorrichtung zum Abbremsen von stabförmlgem Walzgut auf dem Kühlbett eines Walzwerkes
SE14620/72A SE367933B (enrdf_load_stackoverflow) 1972-11-09 1972-11-10
US00306821A US3810283A (en) 1972-11-09 1972-11-15 Apparatus for braking rolled bars to rest on the cooling bed of a bar mill
FR7244350A FR2209617B1 (enrdf_load_stackoverflow) 1972-11-09 1972-12-13

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19722254926 DE2254926C3 (de) 1972-11-09 Vorrichtung zum Abbremsen von stabförmlgem Walzgut auf dem Kühlbett eines Walzwerkes
SE14620/72A SE367933B (enrdf_load_stackoverflow) 1972-11-09 1972-11-10
US00306821A US3810283A (en) 1972-11-09 1972-11-15 Apparatus for braking rolled bars to rest on the cooling bed of a bar mill
FR7244350A FR2209617B1 (enrdf_load_stackoverflow) 1972-11-09 1972-12-13

Publications (1)

Publication Number Publication Date
US3810283A true US3810283A (en) 1974-05-14

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ID=27431580

Family Applications (1)

Application Number Title Priority Date Filing Date
US00306821A Expired - Lifetime US3810283A (en) 1972-11-09 1972-11-15 Apparatus for braking rolled bars to rest on the cooling bed of a bar mill

Country Status (3)

Country Link
US (1) US3810283A (enrdf_load_stackoverflow)
FR (1) FR2209617B1 (enrdf_load_stackoverflow)
SE (1) SE367933B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520632A (en) * 1991-04-11 1996-05-28 Robert Leveen Ascites valve
CN105880301A (zh) * 2014-04-25 2016-08-24 安徽马钢工程技术集团有限公司 一种钢坯翻转冷床装置的作业方法
CN109731930A (zh) * 2019-01-08 2019-05-10 山东莱钢永锋钢铁有限公司 一种冷床上钢气动制动系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266618A (en) * 1965-03-08 1966-08-16 United States Steel Corp Conveyor for decelerating traveling products
US3548997A (en) * 1967-09-30 1970-12-22 Otto Karl Buchheit Live roller feed table with ejecting means
US3647128A (en) * 1969-09-17 1972-03-07 Burroughs Corp Web-tensioning device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE474217C (de) * 1929-03-28 Fried Krupp Grusonwerk Akt Ges Auflaufrollgang bei Kuehlbetten von Walzwerksanlagen
DE403989C (de) * 1923-03-28 1924-10-15 Berg Und Huettenwerks Ges Vorrichtung zum Abfangen des auf ein Kuehlbett zu foerderden Walzgutes
DE533933C (de) * 1928-08-28 1931-09-22 Demag Akt Ges Vorrichtung zum Strecken von auf ein Kuehlbett gelangenden Stabeisen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266618A (en) * 1965-03-08 1966-08-16 United States Steel Corp Conveyor for decelerating traveling products
US3548997A (en) * 1967-09-30 1970-12-22 Otto Karl Buchheit Live roller feed table with ejecting means
US3647128A (en) * 1969-09-17 1972-03-07 Burroughs Corp Web-tensioning device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520632A (en) * 1991-04-11 1996-05-28 Robert Leveen Ascites valve
CN105880301A (zh) * 2014-04-25 2016-08-24 安徽马钢工程技术集团有限公司 一种钢坯翻转冷床装置的作业方法
CN105880301B (zh) * 2014-04-25 2018-02-13 安徽马钢工程技术集团有限公司 一种钢坯翻转冷床装置的作业方法
CN109731930A (zh) * 2019-01-08 2019-05-10 山东莱钢永锋钢铁有限公司 一种冷床上钢气动制动系统
CN109731930B (zh) * 2019-01-08 2020-12-01 山东莱钢永锋钢铁有限公司 一种冷床上钢气动制动系统

Also Published As

Publication number Publication date
FR2209617B1 (enrdf_load_stackoverflow) 1976-10-29
DE2254926A1 (de) 1974-06-06
SE367933B (enrdf_load_stackoverflow) 1974-06-17
DE2254926B2 (de) 1976-07-29
FR2209617A1 (enrdf_load_stackoverflow) 1974-07-05

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