US3270543A - Machine for flattening and curling of metal strip - Google Patents

Machine for flattening and curling of metal strip Download PDF

Info

Publication number
US3270543A
US3270543A US390167A US39016764A US3270543A US 3270543 A US3270543 A US 3270543A US 390167 A US390167 A US 390167A US 39016764 A US39016764 A US 39016764A US 3270543 A US3270543 A US 3270543A
Authority
US
United States
Prior art keywords
rolls
flexing
strip
roll
flattening
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
US390167A
Other languages
English (en)
Inventor
Natalis H Polakowski
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.)
McKay Machine Co
Original Assignee
McKay Machine Co
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 BE668383D priority Critical patent/BE668383A/xx
Application filed by McKay Machine Co filed Critical McKay Machine Co
Priority to US390167A priority patent/US3270543A/en
Priority to FR27772A priority patent/FR1456685A/fr
Priority to SE10694/65A priority patent/SE318243B/xx
Priority to DE19651452834 priority patent/DE1452834A1/de
Application granted granted Critical
Publication of US3270543A publication Critical patent/US3270543A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening

Definitions

  • the strip After cold working or heat-treating of metal strip, the strip often exhibits unsatisfactory flatness. This is an extremely undesirable situation since a high degree of flatness is required particularly where thin metal strip is to be used for the production of panels, boxes, cans and the like.
  • roller leveler constructions which are satisfactory for flattening strip above a certain thickness.
  • the strip is exposed to alternating flexure between opposed sets of rollers arranged in a staggered relationship.
  • portions of the strip which are shorter than other portions will be slightly elongated and, as a result, buckles, waves, etc., can be removed. Accordingly, non-flat characteristics and undesirable internal stress patterns are not an insurmount able difliculty where relatively heavy gauge strip is involved.
  • the ratio between strip thickness and roller diameter should be of the order of 1:100 or even 1:50 for efficient flattening. It will be apparent that where such ratios are involved, the rollers should be of the order of one inch in diameter or less for strip as thin as or thinner than 0.010 inch.
  • Flexing rollers as thin as those referred to have little inherent rigidity, and they tend to bend excessively over the discontinuous backing elements, such as are employed, in conventional leveler constructions. Where such bending occurs, suitable flattening cannot be accomplished, and streaks form in the surface of the strip. Consequently, roller levelers of orthodox design cannot use flexing rollers of a desired diameter, which is of the order of 0.75, 0.5 inch, or even less in diameter. In fact, the practical lower limit for flexing rolls in conventional full-width levelers is about one inch in diameter.
  • FIGURE 1 comprises a schematic illustration of a leveler construction characterized by the features of this invention.
  • FIGURE 2 illustrates the construction in combination with a roller set which is used in conjunction with the leveler construction to control and/or suppress the spontaneous curling of the strip.
  • the leveler construction of this invention generally comprises a first set of flexing rolls which are disposed whereby the strip to be flattened can be moved through the apparatus in contact with the same side of each of the flexing rolls.
  • the flexing rolls are adapted to be supported upon a large back-up roll, and this back-up roll may comprise .a large roll of the type used in existing rolling mill stands. It will be appreciated, therefore, that the leveler construction of this invention can be introduced into an existing mill by employing one roll of an unused mill thereby decreasing the amount of initial capital investment.
  • the construction also includes a set of deflector rolls which are disposed in alternating relationship with respect to the flexing rolls.
  • the strip passes between the flexing rolls and the deflector rolls, and the flexing which occurs will introduce the necessary conditions whereby flattening will be achieved.
  • Support rolls are provided for movement in contact with the deflector rolls, and these support rolls are mounted in association with means constantly urging the support rolls into engagement with the deflector rolls.
  • the specific combination described permits the use of flexing rolls of extremely small diameter.
  • the flexing rolls are maintained in position in the construction in a manner such that any tendency of the rolls to bend is resisted due to their contact with the large back-up roll, and due to the condition of the strip as it passes over the roll surfaces.
  • the deflector rolls bear on the strip in a manner such that forces are transmitted to the flexing rolls which are prevented from bending by the large back-up r-oll.
  • FIGURE 1 illustrates a large back-up roll 10 which, as indicated, may belong to the lower one-half of an unused rolling mill.
  • a plurality of flexing rolls 12, 14, 16 and 18 are mounted for rotation in a manner whereby they bear against the surface of the roll 10.
  • Deflector rolls 20, 22, 24, 26'and 28 are located in alternating fashion with respect to the flexing rolls, and strip 36 is guided so as to pass between the flexing rolls and the deflector rolls. It will be noted that one surface of the strip passes in engagement with each of the flexing rolls while the other surface of the strip passes in engagement with each of the deflector rolls.
  • Roll 19 is essentially idle but it can also be driven, if desired, to relieve the tension from the takeup reel.
  • Support rolls 32, 34, 36, 38, 40 and 42 are operatively associated with the deflector rolls. These support rolls are journalled for rotation in members 44 and the particular journals may comprise pillow blocks or any conventional journal arrangement.
  • the members 44 are each attached to a large support member or base 46, and force 48 is applied to 46 to constantly urge the support rollers into engagement with the deflector rollers.
  • the pressure transmitted by the rigid base 46 is distributed substantially uniformly along each support and flexing roll.
  • Suitable hydraulic, pneumatic or mechanical means may be employed for exerting the required force 48 upon the massive member 46.
  • a conventional sc-rewdown mechanism (not shown) can be used for this purpose, the foot of the screws engaging 46 directly or via the upper work and/ or back-up roll.
  • member 46 can be made to tilt for adjustment purposes or it can be stationary, the adjustment of the flattening device then being eflected by moving back-up roll is up and down.
  • the rollers 12 through 18 are provided in successively increasing diameters. With this arrangement, the greatest degree of flexing will occur initially whereby the most pronounced stretching of the strip will be accomplished. The additional flexing operations then contribute in an additive but decreasing sense to the end effect achieved.
  • the roll 12 may be inch in diameter
  • the roll 14 may be /8 inch
  • the roll 16 may be /2 inch
  • the roll 18 may be inch.
  • the deflector rolls and their associated support rolls can also be employed in varying sizes, but their diameters will normally be much larger than those of the thinnest flexing rolls. Their particular size depends to a large extent on considerations involving inclusion of the rolls in the construction. Thus, smaller rolls may be necessary in certain areas due to the space available. In any event, the rolls must be selected whereby the desired bend is achieved as the strip passes over the flexing rolls.
  • the arrangement illustrated provides a unique system for preventing bending of the flexing rolls during operation of the leveler.
  • the back-up roll provides a rigid support against which the flexing rolls bear whereby a high degree of resistance to 'bendnig is provided.
  • the relatively rigid deflector rolls on either side of a flexing roll transmit forces from the strip to the support rolls and then to base 46 which resists any bending tendencies. Accordingly, very small flexing roll diameters can be used in this leveler and, therefore, very thin strips can be successfully processed.
  • the construction of this invention is particularly effective where the rollers engaging the strip are mounted with freedom for movement at their ends.
  • the differential tension and resultant force components acting on each flex roll in a direction parallel to the surface of back-up roll 1!), pressure exerted by the strip on the rollers will not tend to bend the rollers as is the case Where rollers are fixed about an axis of rotation.
  • the tension applied to the strip is effective to transmit pressure to the rollers for holding the rollers in an equilibrium position and the loose mounting at the roller ends prevents rubbing against holding plates at these ends when the equilibrium positions are assumed.
  • the transverse curvature may reach the point where the two strip edges touch each other or even overlap, thus producing a continuous, open seam, thin Walled tube, which may be finished by welding, soldering, adhesive bonding or other methods.
  • the block 50 is intended to designate the construction of FIGURE 1.
  • the block 50 is intended to designate the construction of FIGURE 1.
  • an arrangement including deflect-or rolls 52, flexing roll 54, and backup roll 56 When the strip 30 is passed through this arrangement, it is flexed in a direction opposite the flexing accomplished in the construction 50. Accordingly, the curling tendency is offset, and strips suitable for longitudinal slitting pass out of the leveler. To achieve this end, it is recommended that roll 54 be of a smaller diameter than the smallest flexing roll in the main unit 5%.
  • back-up roll 16 Although the arrangement shown in FIGURE 1 involving the back-up roll 16 is preferred, it will be understood that more than one back-up roll could be employed, particularly in levelers employing additional flexing rolls. It will also be understood that the number of flexing rolls is not a limiting factor of this invention and all of these rolls could be of a same diameter if desired. Finally, reference to back-up rolls and support rollers in the appended claims is intended to refer to elements having cylindrical outer surfaces, such as rings, solid rolls and equivalent arrangements.
  • An apparatus for flattening and curling of metal strip comprising a set of flexing rolls, means for moving said strip through said apparatus whereby one surface of said strip passes through in engagement with said flexing rolls on one side thereof, a large back-up roll for said flexing rolls, said back-up roll engaging said flexing rolls on the opposite side thereof, a set of deflector rolls, each roll in said set of deflector rolls alternating with a roll in said set of flexing rolls, said deflector rolls engaging the opposite surface of said strip, and support rolls for engagement with said deflector rolls, and wherein the flexing rolls are mounted for free floating movement between the strip and the back-up roll.
  • said back-up roll comprises a roll mounted for free rotation in a roll stand.
  • An apparatus in accordance with claim 1 including additional flexing means associated with said apparatus for imparting a bending deformation to said strip of a sign opposite to the bend imparted by said flexing rolls whereby the tendency of said strip to curl upon passage out of said apparatus can be controlled.
  • said additional flexing means comprises a pair of deflector rolls, a flexing roll mounted for free floating movement intermediate said deflector rolls whereby one surface of said strip is adapted to pass in engagement with said deflector rolls while the other surface of said strip passes in engagement with said last mentioned flexing roll on one side thereof, and a large back-up roll engaging said last mentioned flexing roll on the opposite side thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
US390167A 1964-08-17 1964-08-17 Machine for flattening and curling of metal strip Expired - Lifetime US3270543A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE668383D BE668383A (enrdf_load_stackoverflow) 1964-08-17
US390167A US3270543A (en) 1964-08-17 1964-08-17 Machine for flattening and curling of metal strip
FR27772A FR1456685A (fr) 1964-08-17 1965-08-10 Machine à dresser et à rouler les bandes de métal
SE10694/65A SE318243B (enrdf_load_stackoverflow) 1964-08-17 1965-08-16
DE19651452834 DE1452834A1 (de) 1964-08-17 1965-08-17 Vorrichtung zum Abflachen und Einrollen von Metallstreifen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US390167A US3270543A (en) 1964-08-17 1964-08-17 Machine for flattening and curling of metal strip

Publications (1)

Publication Number Publication Date
US3270543A true US3270543A (en) 1966-09-06

Family

ID=23541368

Family Applications (1)

Application Number Title Priority Date Filing Date
US390167A Expired - Lifetime US3270543A (en) 1964-08-17 1964-08-17 Machine for flattening and curling of metal strip

Country Status (5)

Country Link
US (1) US3270543A (enrdf_load_stackoverflow)
BE (1) BE668383A (enrdf_load_stackoverflow)
DE (1) DE1452834A1 (enrdf_load_stackoverflow)
FR (1) FR1456685A (enrdf_load_stackoverflow)
SE (1) SE318243B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503242A (en) * 1967-04-20 1970-03-31 Natalis H Polakowski Mill rolling machine
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
US20090282883A1 (en) * 2008-05-16 2009-11-19 Andreas Noe Method of and apparatus for leveling strip

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482482B1 (enrdf_load_stackoverflow) * 1980-05-16 1984-08-24 Siderurgie Fse Inst Rech
AT368044B (de) * 1981-03-26 1982-08-25 Voest Alpine Ag Verfahren und vorrichtung zum aufwickeln gerichte-ter blechbaender
FR2591130B1 (fr) * 1985-12-10 1989-04-07 Lorraine Laminage Procede et dispositif de formation et de correction de la tuile d'une bande mince de toles d'acier.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252085A (en) * 1938-10-06 1941-08-12 Friedrich K Maussnest Apparatus for flattening and leveling sheet coil, and plate material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252085A (en) * 1938-10-06 1941-08-12 Friedrich K Maussnest Apparatus for flattening and leveling sheet coil, and plate material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503242A (en) * 1967-04-20 1970-03-31 Natalis H Polakowski Mill rolling machine
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
US20090282883A1 (en) * 2008-05-16 2009-11-19 Andreas Noe Method of and apparatus for leveling strip
US8291738B2 (en) * 2008-05-16 2012-10-23 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for leveling strip

Also Published As

Publication number Publication date
FR1456685A (fr) 1966-07-08
BE668383A (enrdf_load_stackoverflow)
DE1452834A1 (de) 1969-10-30
SE318243B (enrdf_load_stackoverflow) 1969-12-08

Similar Documents

Publication Publication Date Title
US4033165A (en) Apparatus for controlling flatness of metal sheet during rolling
EP3655173B1 (en) Systems and methods for controlling flatness of a metal substrate with low pressure rolling
US4669296A (en) Method of operating a four-high roll stand
GB2044652A (en) Method and apparatus for reducing the thickness of metal strip
JPS6160204A (ja) ストリツプ状材料のためのロールスタンド
US3535902A (en) Method and apparatus for straightening sheet materials
US3270543A (en) Machine for flattening and curling of metal strip
US3834202A (en) Metal strip straightening machine
US3245244A (en) Mechanism for flattening metal strip
US3841132A (en) Method of flattening metal strip exhibiting a discontinuous yield point and suppressing the discontinuous yield point
US4267720A (en) Mill for rolling metal strips
US4353237A (en) Method of rolling strip
US3958439A (en) Method for recovering ductility of a cold rolled metal strip
US5161400A (en) Process for levelling continuously moving metal strips
US2025002A (en) Method of rolling sheet metals
US4111025A (en) Straightening mill for section steel
US3507135A (en) Method and apparatus for forming thin metal belts
EP0074944A1 (en) Producing formations in continuously processed material
US3503242A (en) Mill rolling machine
JP2738280B2 (ja) 外法一定平行フランジ溝形鋼の製造方法
US1785986A (en) Method of and apparatus for rolling sheet metal
JP2976834B2 (ja) 圧延チャンネルの製造方法
JPS6064702A (ja) 異形断面条の製造方法
US3680343A (en) Apparatus for leveling thin strip
US2442850A (en) Method of and apparatus for making flat metal tubes