US3332269A - Rolling method and a rolling mill for carrying out the method - Google Patents

Rolling method and a rolling mill for carrying out the method Download PDF

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Publication number
US3332269A
US3332269A US265774A US26577463A US3332269A US 3332269 A US3332269 A US 3332269A US 265774 A US265774 A US 265774A US 26577463 A US26577463 A US 26577463A US 3332269 A US3332269 A US 3332269A
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US
United States
Prior art keywords
roll
rolling
rolls
rolling mill
jumping
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
US265774A
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English (en)
Inventor
Norlindh Sven Erik Malte
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.)
MORGARDSHAMMARS MEK VERKSTADS AB
Original Assignee
Morgardshammars Mek Verkst Sa
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 Morgardshammars Mek Verkst Sa filed Critical Morgardshammars Mek Verkst Sa
Application granted granted Critical
Publication of US3332269A publication Critical patent/US3332269A/en
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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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B13/04—Three-high arrangement
    • 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
    • B21B13/16—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with alternatively operative rolls, e.g. revolver stands, turret mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/203—Balancing rolls
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • 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
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/026—Quinto, five high-stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing

Definitions

  • This invention relates to a rolling mill adapted to roll by employing liftable and lowerable rolls and roll bearing casings as well as fixed roller beds or roller tables.
  • the invention has as its primary object to combine in a liftable and lowerable three-high roll pair the advantages of the conventional two-high reversible rolling mills and of three-high pairs with tilting table.
  • the rolling mill according to the invention is characterized in that the entire roll mounting with associated roll adjusting screws, guides and rest bars are adapted to be lifted and lowered (jumped) respectively between each passage of the material and that for reducing the weight of the roll mounting the adjusting screws are adapted to transfer the rolling pressure directly from the one roll bearing casing receiving the rolling pressure to the other roll bearing casing receiving the rolling pressure, and that an axial guide bar is arranged for effecting axial guidance, which guide bar is provided with guide surfaces engaging with the axial guides of the roll bearing casings.
  • the method according to the invention i characterized in that the roll mounting is elevated and lowered (jumped) respectively between each passage of material by employing fixed roller beds or rolling tables outside of the set of rolls (or roll pair).
  • FIG. 1 is a schematic front view of a jump three-high rolling mill with lifting and lowering means and balancing equipment
  • FIG. 2 is a schematic end view of a jump three-high rolling mill with associated equipment
  • FIG. 3 is a schematic elevation of the rolling mill of FIG. 2;
  • FIG. 4 is a schematic plan view of the rolling mill of FIG. 2.
  • the principle of the jumping three-high stand is that a three-high roll unit which is driven via long spindles by non-reversing drive machinery, is lifted or lowered between each pass, by means of an eccentric mechanism under the stand.
  • the weight of the whole three-high unit can be counterbalanced by a compressed air cylinder connected to an accumulator of adequate size so that the stand, when in the bottom position, is overbalanced upwards, while in the top position, it imposes a load on the jumping mechanism.
  • FIG. 1 shows a jumping three-high pair in lowered position in relation to the height of the roller bed 34 comprising rolls 1, 2 and 3, driven by universal spindles 7, bearing casings 1a, 2a and 3a and restbar 1b, 2b and 3b.
  • the entire roll pair is guided by the stands 21 and balanced by cylinder 23 having its piston rod 22 secured in the restbars 3b of the upper roll.
  • the entire balancing equipment is carried by pillars 27 and beams 28.
  • the jumping movement is carried out by the gear means 29 with crank webs 30 and lifting arms 31.
  • Reverse braking of the motor 32 i connected by means of limit contacts, and a holding brake 33 retains the motor and thus the roll pair in the adjusted upper and lower position respectively.
  • FIG. 2 show an end view of a jumping three-high mill in lowered position with the rolls 1, 2, 3 and associated bearing casings 1a, 2a, 3a and drive means 1e, 2e, 3e (FIG. 3) and with fixed roller beds 6.
  • FIG. 3 shows the same mill in a side view and FIG. 4 shows it seen from. above.
  • the roll pair is guided in rolling position against the acceleration force of the material by the stands 70 and 71 with vertical guides 70a, FIG. 4, operating in corresponding guides in the bearing casings 1a, 2a, 3a, and 71a oper ating in corresponding guides formed, for example, in the restbars 1b, 2b, 3b.
  • the rolls are guided in axial direction against an axial guide bar 72 foldable by the cylinder 72c and provided with guiding faces 72a and fulcrum 7212, FIG. 15.
  • the guiding faces 72a engage with the axial guides 1d, 2d, 3d in the roll bearing casings.
  • the entire roll mounting is supported with the lengthened screws 2 of the intermediate bearing casings on a carrier 79.
  • the upper and lower rolls can be adjusted between the passes to the desired play relative to the intermediate roll by means of the adjusting screw motors 1g, 3g.
  • the carrier 79 with wheels 80 is supported on rails 81 on a liftable and lowerable table 82 which jumps with the drive mechanism 74, 75, 76, 77, 78 and is balanced by the cylinders 73.
  • the carrier 79 can be transferred to a roll exchange carrier 85, the liftable and lowerable table being supported on a fixed stand 83 when the crank webs 75 of the jumping mechanism as sume their lowermost position. At certain local conditions, it may be preferable to exchange the roll when the roll pair is in upper position.
  • the upper and lower rolls 1 and 3 are first played to a certain distance in relation to the intermediate roll 2, and the pair is lowered to lowermost position, so that the table 82 rests upon stand 83.
  • the coupling heads 1e, 2e, 3e can then be fixed in a holder which maintains them in their positions until they are pushed on the rolls of the new roll pair.
  • the foldable axial guide bar 72 is folded aside and the play mechanism 84 draws the roll pair to the roll exchange carrier 85 which moves the new roll pair directly in front of the rolling position.
  • the play mechanism 84 draws the new pair into engagement with the couplings 1e, 2e, 3e and the axial guide 72 is folded up.
  • the coupling holders are loosened and the new roll pair is ready for operation.
  • jumping three-highs show the advantages as follows:
  • the depth of the box groove is determined by the height of the material subsequent to the second pass after the upward turn. Consequently the groove is shallow, so that the rolls must be separated for the first pass after the upward turn, which includes greater risk of tilting. For this reason, it is almost necessary to provide two-high reversing mills with manipulating rules for holding and guiding the material, while in three-high mills with tilting table about the same safety of operation is obtained by employing finger edgers and box-shaped entry guides.
  • Jumping three-highs render possible safer rolling in that lateral guides (guide boxes) may be used at the entry guide end to prevent the hot rolling material from being engaged by or tilted against a groove flange. In many cases, it is even possible to give the discharge guides a better construction than in two-high reversing mills.
  • a lower playing speed may be chosen in jumping three-highs than in two-high reversing mills, because there are two intervals and one passing period available for the playing, for example, of the upper roll 3 whilst rolling in the intermediate and lower roll 2 and 1 respectively. Thereby a more accurate setting of the roll pass is obtained.
  • a rolling mill comprising fixed stand means having elongated guiding surfaces along which mounted rolls can be moved;
  • work feeding means operative to feed a workpiece in a plane perpendicular to the direction of roll movement
  • bearing casings and bar means constituting a roll mounting
  • a rolling mill comprising fixed stand means having elongated guiding surfaces along which mounted rolls can be moved;
  • work feeding means operative to feed a workpiece in a plane perpendicular to the direction of roll movement
  • bearing casings and bar means constituting a roll mounting
  • the rolling mill according to claim 1 characterized in that the guide of the roll set in the rolling direction is so constructed that the roll set can be pushed into and pulled out of the guides in the longitudinal direction of the roll and be locked in the rolling position in axial guides for facilitating rapid roll set exchange.
  • the rolling mill according to claim 1 characterized in that the set of rolls includes an intermediate roll provided with adjusting screws which are downwardly extended and supported on a table which table comprises a mechanism for effecting lifting and lowering movements of the table and also equipment for balancing the load of the roll set.
  • the rolling mill according to claim 4 characterized in that the set of rolls comprises at least three rolls disposed one above the other, and in that the entire set of rolls is suspended in a balancing means acting upon the bearing casings of the uppermost roll, and that the means for effecting the lifting and lowering movements act upon the bearing casings of the lower roll.
  • said means for effecting the lifting and lowering movements comprises an electric motor which via gear means actuates a lever system engaging with the bearing casings of a lower roll.
  • the rolling mill according to claim 5 characterized in that it comprises a combined oil-hydraulic lifting and lowering means and a pneumatic balancing means.
  • the rolling mill according to claim 5 characterized in that balancing is carried out with a pneumatic container of such small size that the roll pair is balanced in intermediate position and is overbalanced in lower position and underbalanced in upper position, thereby assisting the means for effecting the lifting and lowering movements in starting and braking masses involved in the rolling operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Tires In General (AREA)
  • Winding Of Webs (AREA)
  • Mechanisms For Operating Contacts (AREA)
US265774A 1962-03-22 1963-03-18 Rolling method and a rolling mill for carrying out the method Expired - Lifetime US3332269A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE03222/62A SE333713B (de) 1962-03-22 1962-03-22

Publications (1)

Publication Number Publication Date
US3332269A true US3332269A (en) 1967-07-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US265774A Expired - Lifetime US3332269A (en) 1962-03-22 1963-03-18 Rolling method and a rolling mill for carrying out the method

Country Status (10)

Country Link
US (1) US3332269A (de)
AT (1) AT257517B (de)
BE (1) BE629942A (de)
DK (1) DK115031B (de)
ES (1) ES286329A1 (de)
FR (1) FR1362501A (de)
GB (1) GB1038222A (de)
NL (2) NL141103B (de)
NO (1) NO116157B (de)
SE (1) SE333713B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527751B1 (de) * 1966-09-05 1971-07-15 Moeller & Neumann Gmbh Walzwerk zum reversierenden Auswalzen von Staeben mit mindestens drei Walzen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1014676A (en) * 1909-08-16 1912-01-16 Morgan Engineering Co Three-high-roll mill.
FR552073A (de) * 1922-05-15 1923-04-23
US2601794A (en) * 1947-07-18 1952-07-01 Erwin Loewy Rolling mill
US2676502A (en) * 1949-09-28 1954-04-27 Norlindh Sven Erik Malte Universal rolling mill
US3136182A (en) * 1959-03-28 1964-06-09 Demag Ag Replacement of roll stands in rolling mills

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1014676A (en) * 1909-08-16 1912-01-16 Morgan Engineering Co Three-high-roll mill.
FR552073A (de) * 1922-05-15 1923-04-23
US2601794A (en) * 1947-07-18 1952-07-01 Erwin Loewy Rolling mill
US2676502A (en) * 1949-09-28 1954-04-27 Norlindh Sven Erik Malte Universal rolling mill
US3136182A (en) * 1959-03-28 1964-06-09 Demag Ag Replacement of roll stands in rolling mills

Also Published As

Publication number Publication date
NL290543A (de)
SE333713B (de) 1971-03-29
DE1427944A1 (de) 1968-11-14
DK115031B (da) 1969-09-01
GB1038222A (en) 1966-08-10
NL141103B (nl) 1974-02-15
NO116157B (de) 1969-02-10
ES286329A1 (es) 1963-08-01
FR1362501A (fr) 1964-06-05
AT257517B (de) 1967-10-10
DE1427944B2 (de) 1976-01-29
BE629942A (de)

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