US3245244A - Mechanism for flattening metal strip - Google Patents

Mechanism for flattening metal strip Download PDF

Info

Publication number
US3245244A
US3245244A US300488A US30048863A US3245244A US 3245244 A US3245244 A US 3245244A US 300488 A US300488 A US 300488A US 30048863 A US30048863 A US 30048863A US 3245244 A US3245244 A US 3245244A
Authority
US
United States
Prior art keywords
rolls
strip
flexing
roll
work rolls
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
US300488A
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.)
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 BE651588D priority Critical patent/BE651588A/xx
Application filed by Individual filed Critical Individual
Priority to US300488A priority patent/US3245244A/en
Priority to LU46682D priority patent/LU46682A1/xx
Priority to CH1013864A priority patent/CH428633A/de
Priority to GB31186/64A priority patent/GB1002936A/en
Priority to FR984188A priority patent/FR1402750A/fr
Priority to NL6408960A priority patent/NL6408960A/xx
Priority to DE19641452822 priority patent/DE1452822A1/de
Priority to AT681564A priority patent/AT259976B/de
Application granted granted Critical
Publication of US3245244A publication Critical patent/US3245244A/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
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/222—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a rolling-drawing process; in a multi-pass mill
    • 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

Definitions

  • This invention relates to an improved apparatus for flattening metal strip.
  • the invention is concerned with a unique mechanism which is pecularily suitable for the flattening of extremely thin metal strip.
  • metals strips After completion of working operations in cold rolling mills, metals strips often exhibit an unsatisfactory flatness. Since a high degree of flatness is required for relatively thin metal strip which is to be used for the production of panels, boxes, cans, etc., procedures must be devised for removing waviness in the sheet.
  • roller leveler devices which are capable of flattening strip above a certain thickness.
  • the strip is exposed to alternative flexure between opposed sets ofrollers arranged in a staggered relationship.
  • portions of the strip which are shorter than others will slightly elongate and, therefore, buckles, waves, etc., can be removed.
  • roller leveler machines have been developed to a high degree of perfection for use with a relatively thick strip.
  • extreme difliculties have been encountered.
  • Such strips especially in the work-hardened state, are almost impossible to flatten becausethe required plastic flexture cannot be accomplished in a conventional r-oller leveler.
  • the main difliculty with respect to such strip lies in the necessity for providing flexing rollers of sufficiently small diameter so that the ratio between strip thickness and roller diameter is of the order of. 1:100 when the strip is about 0.01 inch thick or thinner, rollers of one inch diameter or less would be required.
  • roller levelers of orthodox design cannot utilize rollers as thin as 0.2-0.5 inch in diameter and are, the-refore, incapable of efficient flattening of strips about 0.005 inch thick or thinner- Indeed, the practical lower limit for work rolls in common levelers lies around one to inch diameter.
  • FIGURE 1 is a vertical elevational view, partly in 3,245,244 Patented Apr. 12, 1966 section, of one suitable mechanism for accomplishing the objects of this invention
  • FIGURE 2 is .an elevational view of the flexing rolls and supporting frame use in the construction of FIG- URE 1;
  • FIGURE 3 is a diagrammatic view illustrating the travel of strip to be flattened with the construction of FIGURE 1;
  • FIGURE 4 is an enlarged fragmentary sectional view taken about the line 44 of FIGURE 1;
  • FIGURE 5 is a diagrammatic view of an alternative form of the invention.
  • FIGURE 6 is a diagrammatic view of a still further alternative form of the invention.
  • the apparatus of this invention includes a stand which is adapted to carry a plurality of work rolls of relatively large diameter arranged to rotate about their fixed axes. Means are also associated with the apparatus which are capable of supporting flexing rolls, and the strip to be flattened is carried in contact with the work rolls and flexing rolls. It must be emphasized that both the flexing rolls and the work rolls partake in flexing of the strip; however, the different terms are used to provide a means for distinguishing between the difierent sets of rolls used in the systems of this invention.
  • An important feature of this invention provides for a floating arrangement of the flexing rolls whereby neither the ends of the rolls nor their bodies are supported for rotation about a fixed axis. T o the contrary, the flexing rolls which characterize the apparatus of this invention are held in position by means which uniformly support them along their length whereby bending or deflection of these rolls will not take place during the strip flattening operation. With this arrangement, rolls having a diameter of about one inch or less can be employed for flattening metal strip even where the strip is relatively wide.
  • the strip to be flattened is adapted to pass while under tension in contact with the flexing rolls on both sides thereof whereby the strip itself acts as the means which prevents deflection of the flexing rolls.
  • the arrangement provided by this invention enables firm holding of the flexing rolls in position whereby the desired flexure in the strip can be uniformly accomplished and whereby the danger of distortion of the flexing rolls is substantially eliminated.
  • the strip to be flattened is alternatively passed over large work rolls and over flexing rolls.
  • the work rolls and flexing rolls are arranged in staggered relationship, and although the flexing rolls do not actually contact the work rolls, deflection of the flexing rolls is eliminated as a result of the rigidity of the work rolls and due to the support of the strip itself.
  • the strip to be flattened is at all times passing between the flexing rolls and work rolls in accordance with this form of this invention; however, the strip which moves under tension constantly presses against the flexing rolls whereby they are urged in a manner such that back-up support is provided by the work rolls.
  • FIGURE 1 illustrates a structure 10 including a base 12 having a first upstanding post 14 integrally associated therewith.
  • This post 14 includes bearing members 16 whereby the ends 18 of work rolls 20 can be rotatably carried by this post.
  • the post 14 also includes projections 22 which pivotally carry a roll supporting platen 24.
  • This platen pivots about the pin 26 and also includes bearing member 28 for carrying the ends 18 of a second set of rolls 20.
  • the Work rolls are shown end-journalled to explain the principle of the disclosed systems, it is obvious that in wide units, a conventional backing structure may be employed with respect to these work rolls.
  • An intermediate section 30 of the post 14 defines a recess 32 which receives the lower end 34 of a frame 36.
  • the sides 38 of this frame define openings 40 which are adapted to receive the ends 42 of flexing rolls 44'. It will be noted that the openings 40 are oversize whereby vertical displacement of the ends 42 can be accomplished.
  • the strip 46 which is to be flattened is guided through the apparatus whereby the strip will pass over the uppermost left-hand work roll and then downwardly along a path defined between the flexing rolls 44 and the lefthand bank of work rolls.
  • a large idler roll 48 is pro vided at the bottom of the apparatus and is rotatably supported on shaft 50. The strip 46 changes direction when passing over this idler roll and then passes upwardly between the right-hand set of work rolls 20 and the flexing rolls 44.
  • the frame member 36 is adapted to be seated in the stand whereby each of the rolls 44 can float within the generally diamond shaped spaces 52 defined between the opposed adjacent rolls 20. It will be appreciated that with this arrangement, the rolls 44 will actually rest on the surfaces of the strip 46 and the ends 42 of these rolls will not contact the frame. Accordingly, bending stresses will not be set up in the rolls and deflection thereof will be avoided.
  • the illustrated construction provides a threaded member 54 adapted to be attached to the portion 24 by means of nuts 56.
  • the portion 24 can be pivoted clear of the apparatus to facilitate threading of the strip 46. This threading operation should be accomplished by moving this portion 24 to the dotted line position shown in FIGURE 1 bringing the strip around the roll 48 and then upwardly over the top right-hand roll 20. The portion 24 can then be clamped in place and the strip can be passed to finishing leveling step comprising rolls 58 shown in FIGURE 3.
  • the strip is to be drawn through the apparatus while maintained under tension.
  • the tension applied to the strip must be at least sufiicient to provide pressure against the flexing rolls whereby the floating arrangement will be achieved.
  • drag means may be applied to the play-out reels, pinch rolls may be used at intermediate points, and tension take-up reels may be provided. It will be obvious that various combinations of conventional means for holding strip under tension can be suitably employed in the systems of this invention.
  • the sheet 59 is fed over the inner peripheral portion of a first roll 60.
  • the sheet is then subjected to bending over the side surface of intermediate flexing roll 61.
  • the sheet is bent about the inner peripheral portion of roll 62, this roll comprising the second roll in a pair of work rolls constituting the rolls 60 and 62.
  • a roll 63 is provided whereby the direction of movement of the sheet can be reversed.
  • the sheet is then fed back over rolls 64, 61 and 65.
  • the rolls 64 and 65 comprise a pair of rolls which, with the first mentioned pair of rolls, form a cluster of four rolls similar to the clusters heretofore described.
  • the strip 66 is first passed over work roll 68, around the flexing roll 70, then around the next two work rolls into contact with flexing roll 72.
  • the flexing rolls 70 and 72 are provided alternately above and below the rolls 68. It will be appreciated however, that these work rolls provide the necessary back-up for the flexing rolls whereby deflection can be avoided.
  • a floating mounting for the flexing rolls is also contemplated with respect to the embodiment shown in FIGURE 6. 7
  • the concepts of the instant invention are contemplated for use with metal strips even where such strips are not considered extremely thin.
  • the support features described herein will eliminate to some degree the necessity for using roll manufacturing procedures designed to eliminate a tendency toward bending.
  • the concepts of this invention have considerable value since the rolls in levelers of this nature tend to deflect even though they are of relatively great diameter.
  • the instant invntion is not intended to be limited to a particular formula, it has been determined that the maximum diameter of a small roll that can be accommodated in the spaces 52, when the work rolls are in their most closely spaced arrangement, is about equal to r( 1) where r is equal to the radius of the work rolls. It will be understood that where larger spaces are defined between the work rolls, then larger flexing rolls can be included in the spaces. Similarly, rolls smaller than the maximum suggested by the above relationship can be suitably employed.
  • An apparatus for flattening metal strip comprising a stand, a plurality of work rolls mounted for rotational movement in said stand, said rolls being arranged in at least two, spaced-apart, opposed rows, an open space defined between each set of adjacent rows, a strip flexing roll fitted within each such space, each flexing roll being mounted for floating movement within said space, and means for transporting said strip through said apparatus whereby the strip is carried in contact with one row of said Work rolls and in contact with said flexing rolls, said strip being thereafter returned to pass into contact with the other row of said work rolls and in contact with said flexing rolls whereby the flexing rolls are held in position substantially completely through engagement with said strip.
  • An apparatus for flattening metal strip comprising a stand, a plurality of work rolls mounted for rotational movement in said stand, said rolls being arranged in at least two, spaced-apart, opposed rows, the rolls in each of said rows being arranged with their axes in parallel relationship and being co-planar whereby a generally diamond shaped open space is defined between each set of adjacent rolls, a strip flexing roll fitted within each such space, each flexing roll being mounted for floating movement within said space and means for transporting said strip through said apparatus whereby the strip is carried through said spaces first in cont-act with one row of said work rolls and in contact with said flexing rolls, and is thereafter returned through said space to pass in contact with the other row of said work rolls and in contact with said flexing rolls whereby the flexing rolls are supported substantially completely through engagement with said strip.
  • An apparatus for flattening metal strip comprising a stand, a plurality of work rolls mounted in adjacent pairs for rotational movement in said stand, a strip flexing roll fitted within the spaces defined between each pair of work rolls with the flexing roll associated with one pair of work rolls being mounted on one side of said work rolls and the flexing roll associated with an adjacent pair of work rolls being mounted on the other side of said work roll, each flexing roll being mounted for floating movement within said space, means for transporting said strip through said apparatus whereby the strip passes between each flexing roll and the adjacent work rolls, said flexing rolls being held in a floating position within said space by means of forces applied to their surfaces by said strip.
  • a method of leveling sheet metal which comprises feeding the sheet into a space defined by a cluster of four rolls and an intermediate roll in said space, said four rolls being fixedly arranged in pairs of work rolls on either side or opposite sides of said intermediate roll, the method including the following successive steps (1) feeding the sheet under tension into said space and bending it in one direction over the inner peripheral portion of a first roll of the first pair of work rolls;
  • the method of leveling sheet metal which comprises feeding the sheet into .a space defined by a cluster of four work rolls and about the opposite sides of an intermediate floating roll, and maintaining a tension on said sheet during said feeding whereby said intermediate roll is drawn toward the inner peripheral surfaces of a pair of work rolls to press the sheet against such surfaces and thereby back up said intermediate roll.
  • the method of leveling metal sheet stock which comprises feeding the sheet continuously into a space defined by a first group of work rolls and a second group of work rolls with a floating roll between each pair of work rolls in the first and second group of work rolls and in the space between said group of work rolls, the method comprising the steps of feeding the sheet under tension into the space between the two groups of work rolls for passage in one direction between the floating roll and the adjacent pair of rolls in the first group of work rolls and then in the opposite direction between the floating roll and the adjacent pair of rolls in the second group of work rolls whereby the sheet is flexed in one direction during passage between the first group of work rolls and the floating roll and in the opposite direction during passage between the second group of work rolls and the floating roll and whereby the floating roll is supported on its opposite sides by said sheet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
US300488A 1963-08-07 1963-08-07 Mechanism for flattening metal strip Expired - Lifetime US3245244A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE651588D BE651588A (enrdf_load_stackoverflow) 1963-08-07
US300488A US3245244A (en) 1963-08-07 1963-08-07 Mechanism for flattening metal strip
CH1013864A CH428633A (de) 1963-08-07 1964-08-03 Verfahren und Vorrichtung zum Glätten von Metallbändern
LU46682D LU46682A1 (enrdf_load_stackoverflow) 1963-08-07 1964-08-03
GB31186/64A GB1002936A (en) 1963-08-07 1964-08-04 Mechanism for flattening metal strip
FR984188A FR1402750A (fr) 1963-08-07 1964-08-05 Dispositif pour le planage des bandes de métal
NL6408960A NL6408960A (enrdf_load_stackoverflow) 1963-08-07 1964-08-05
DE19641452822 DE1452822A1 (de) 1963-08-07 1964-08-07 Mechanismus zum Abflachen von Metallstreifen
AT681564A AT259976B (de) 1963-08-07 1964-08-07 Vorrichtung zum Richten von Metallbändern oder -bahnen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300488A US3245244A (en) 1963-08-07 1963-08-07 Mechanism for flattening metal strip

Publications (1)

Publication Number Publication Date
US3245244A true US3245244A (en) 1966-04-12

Family

ID=23159306

Family Applications (1)

Application Number Title Priority Date Filing Date
US300488A Expired - Lifetime US3245244A (en) 1963-08-07 1963-08-07 Mechanism for flattening metal strip

Country Status (8)

Country Link
US (1) US3245244A (enrdf_load_stackoverflow)
AT (1) AT259976B (enrdf_load_stackoverflow)
BE (1) BE651588A (enrdf_load_stackoverflow)
CH (1) CH428633A (enrdf_load_stackoverflow)
DE (1) DE1452822A1 (enrdf_load_stackoverflow)
GB (1) GB1002936A (enrdf_load_stackoverflow)
LU (1) LU46682A1 (enrdf_load_stackoverflow)
NL (1) NL6408960A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036045A (en) * 1976-07-14 1977-07-19 General Electric Company Calibrated adjustable roll straightener for wire
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
US5560239A (en) * 1994-10-11 1996-10-01 Conlan; William A. Fish tape restorer
US5946929A (en) * 1997-07-02 1999-09-07 Norcold, Inc. RV refrigerator with combustion seal and heat deflector

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244203A (en) 1979-03-29 1981-01-13 Olin Corporation Cooperative rolling process and apparatus
US4412439A (en) 1981-05-04 1983-11-01 Olin Corporation Cooperative rolling mill apparatus and process
US4414832A (en) 1981-09-11 1983-11-15 Olin Corporation Start-up and steady state process control for cooperative rolling
US4781050A (en) * 1982-01-21 1988-11-01 Olin Corporation Process and apparatus for producing high reduction in soft metal materials
US4478064A (en) * 1982-03-04 1984-10-23 Olin Corporation Modifications to a cooperative rolling system for increasing _maximum attainable reduction per pass
DE19708488A1 (de) * 1997-03-03 1998-09-10 Betr Forsch Inst Angew Forsch Vorrichtung zum Biegerichten von Metallband
US8707529B2 (en) 2008-12-11 2014-04-29 The Material Works, Ltd. Method and apparatus for breaking scale from sheet metal with recoiler tension and rollers adapted to generate scale breaking wrap angles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303096A (en) * 1940-03-21 1942-11-24 Herbert V Thaden Apparatus for leveling and hardening sheet or strip material
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303096A (en) * 1940-03-21 1942-11-24 Herbert V Thaden Apparatus for leveling and hardening sheet or strip material
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036045A (en) * 1976-07-14 1977-07-19 General Electric Company Calibrated adjustable roll straightener for wire
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
US5560239A (en) * 1994-10-11 1996-10-01 Conlan; William A. Fish tape restorer
US5946929A (en) * 1997-07-02 1999-09-07 Norcold, Inc. RV refrigerator with combustion seal and heat deflector

Also Published As

Publication number Publication date
AT259976B (de) 1968-02-12
GB1002936A (en) 1965-09-02
LU46682A1 (enrdf_load_stackoverflow) 1964-10-03
BE651588A (enrdf_load_stackoverflow)
DE1452822A1 (de) 1969-10-30
NL6408960A (enrdf_load_stackoverflow) 1965-02-08
CH428633A (de) 1967-01-31

Similar Documents

Publication Publication Date Title
US3245244A (en) Mechanism for flattening metal strip
US2095733A (en) Metal rolling
US4122696A (en) Method and apparatus for manufacturing metallic pipe
US3605470A (en) Pressure assisted tension roller leveler
US3001569A (en) Tube forming tool
US4385512A (en) Tandem rolling mill train for metal plate and sheet
US2337047A (en) Method of and apparatus for stretching metal strips
JPH0824958B2 (ja) ローラーレベラー
US2275095A (en) Method and means for leveling and hardening thin gauge metals
SU687668A1 (ru) Способ неприрывной прокатки и стандл ЕгО ОСущЕСТВлЕНи
US3270543A (en) Machine for flattening and curling of metal strip
US4353237A (en) Method of rolling strip
US3374653A (en) Strip leveling apparatus
EP0508475B1 (en) Tension roller leveler
CN214348650U (zh) 一种辊式矫直机板型控制装置
US3680343A (en) Apparatus for leveling thin strip
US3269163A (en) Back-up roll construction
US1785986A (en) Method of and apparatus for rolling sheet metal
US2180879A (en) Method of and apparatus for flattening sheet material
US3274814A (en) Rolling mill
CN213316929U (zh) 一种用于冷轧薄板带材的辊式矫直机
JPS58116902A (ja) 被加工材の調質圧延および矯正を選択的にまたは逐次連続して行い得る装置
CN113305147B (zh) 一种铜棒材轧制宽铜板的多工序加工装置及其方法
JPS62199220A (ja) ロ−ラレベラ
JP3314955B2 (ja) ローラーレベラー