US3377830A - Method and apparatus for reducing strip - Google Patents

Method and apparatus for reducing strip Download PDF

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Publication number
US3377830A
US3377830A US465115A US46511565A US3377830A US 3377830 A US3377830 A US 3377830A US 465115 A US465115 A US 465115A US 46511565 A US46511565 A US 46511565A US 3377830 A US3377830 A US 3377830A
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US
United States
Prior art keywords
strip
rolls
roll
housing
work
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
US465115A
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English (en)
Inventor
John A Campbell
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Priority to US465115A priority Critical patent/US3377830A/en
Priority to GB24929/66A priority patent/GB1150166A/en
Priority to BE682460D priority patent/BE682460A/xx
Priority to DE19661527881 priority patent/DE1527881A1/de
Priority to FR65529A priority patent/FR1483386A/fr
Application granted granted Critical
Publication of US3377830A publication Critical patent/US3377830A/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
    • 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
    • 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
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B21F9/005—Straining wire to affect the material properties of the wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B21F9/007—Straining wire to induce a plastic deformation of the wire

Definitions

  • ABSTRACT OF THE DISCLOSURE A method of reducing the thickness of a strip by passing in around substantial arcs of successive rotating work rolls with the unsupported length of strip between the rolls being a maximum of two inches and the ratio between strip width and unsupported length being at least 9 to 1, and applying tensional forces to the strip suflicient to stretch the strip between the rolls.
  • Apparatus which may be used to practice the method includes two sets of bridle rolls having the rolls in one set driven at one speed equal to the speed of one work roll and the rolls in the other set driven at a different speed equal to the speed of the other work roll.
  • This invention relates to a method and apparatus for reducing strip thickness and more particularly for reducing cold steel strip to a very thin gauge.
  • Strip is ordinarily reduced in thickness by a combination of compression and tension stresses, this being done in well known rolling mills.
  • This has many disadvantages including the expensive and heavy equipment which is necessary because of the high roll pressures developed, the cost of providing cool'ants and lubricants, the high frictional horse power require-d to make the roll slip on the surface of the strip, and the restriction of the minimum strip thickness which is dependent upon the Work r011 diameter.
  • Stone Patent N0. 2,526,296 dated Oct. 17, 1950 discloses a method of reducing strip without the necessity of compression forces.
  • the amount of reduction possible by Stones method and apparatus is limited to that for tension tempering which may be on the order of 3% as compared to reductions of many times that almount in cold rolling. Stones method also results in a necking down of the width of the strip.
  • FIGURE 1 is a schematic plan view of the apparatus of my invention
  • FIGURE 2 is a schematic side elevation of the apparatus of FIGURE 1;
  • FIGURE 3 is a longitudinal sectional view of a portion of the apparatus of my invention.
  • FIGURE 4 is a side elevation of a portion of FIGURE
  • FIGURE 5 is a view taken on line V-V of FIGURE 4 on an enlarged scale
  • FIGURE 6 is a view taken on line V'IV'I of FIGURE
  • reference numeral 2 indicates a pay-off reel for supporting a coil of strip S.
  • the reel 2 is connected through gear box 4 to a motor 6 which has a speed control 60.
  • a stationary base '8 is arranged on the exit side of reel 2 and includes 4 3,377,830 lcfi Patented Apr. 16, 1968 spaced apart longitudinal ways 10 formed by a steel plate 12 and bronze plates 14, 1'6 and 18 attached thereto.
  • a housing 20 is supported on the ways 10' for longitudinal sliding movement.
  • the housing 20 includes at each longitudinal side a downwardly extending flange 22 with a horizontal plate 24 attached thereto.
  • a longitudinal plate 26 is mounted on the base 8 along each side of the hou'sing 20 above the plate 24. At least two hydraulic cylinders 28 are mounted on the base 8 along each side of the housing 20.
  • a piston rod 30 associated with each cylinder extends upwardly from the base 8 and has a nut 32 threaded on its upper end. Slots 34 and 3 6 are provided in the plates 24 and 26, respectively for re DCving each piston rod 30.
  • a washer 38 is provided between the plate 26 and each nut 3-2.
  • a reversible motor 40 is mounted on the base 8 and rotates a screw 42 through a gear reducer 44.
  • a nut 46 attached to the bottom of housing 20 surrounds the screw 42 so that rotation of screw 42 will move the housing 20 longitu'dinally.
  • Bridle roll-s 4'8, 49, 50, 51, 52 and 53 and work roll '54 are rotatably supported in the housing 20.
  • the work roll 54 preferably has a larger diameter than the bridle rolls.
  • Rolls 48 to 54 are driven by motors 48M to 54M, respectively, through gearing 486 to 546 and shaft'in'g 485 to 548, respectively, the 'sh-a fting being so constructed that it permits movement of the housing 20 toward and away from a fixed housing 56.
  • the motors 48M to 54M have individual speed controls 48C to 54C.
  • Fixed housing 56 is arranged on the exit side of housing 20 and rotatably supports work roll 58 and bridle rolls 59, 60, 61, 62 and 63.
  • work roll 58 is supported above work roll 54 and has substantially the same diameter as work roll 54.
  • Rolls 58 to 63 are driven by motors 58M to 63M, respectively, through gearing 58G to 63G an d shafting 588 to 638.
  • the motors 58M to 63M have individual speed controls 58C to 630.
  • a winding reel 66 is mounted on the exit side of roll 63 and is driven train motor 68 through gearing 70.
  • Motor 68 has a speed control 680. It will be seen that rolls 48 to 54 are arranged in staggered relationship and that the strip S passes around the rolls in a tortuous path with a sub- 'stantial amount of angular wrap developed by the strip being in contact with the surfaces of the rolls.
  • rolls 58 to 63 This is also true of rolls 58 to 63.
  • the speeds of the rolls 48 to 54 are controlled so that their peripheral speeds are equal.
  • the peripheral speed of roll 58 is greater than the peripheral speed of roll 54 with the peripheral speeds of rolls 59 to 63 being equal to that of roll 58.
  • motor 40 is operated to move housing 20 away from housing 56 so that rolls 54 and 58 will be separated. While the amount of separation of these rolls may vary depending upon the width of the strip S, I have found that the unsupported length of the strip between these rolls must not exceed 2 in., and that this distance may be decreased to zero, but without any compression on the strip S.
  • the unsupported length of strip is the distance from the point of tangency of the strip on roll 54 to the point of tangency of the strip on roll 58.
  • the ratio between the width of the strip and the unsupported length of the strip should be a minimum of 9 to 1 and is preferably greater. For example, a ratio of 36 to 1 gives good results.
  • the speeds of the reel 2, rolls 48 to 54 and 58 to 63, and reel 66 are adjusted to give the desired reduction.
  • fluid is delivered to the upper part of the cylinders 28 so as to clamp the housing 20 in position against bronze block 14 and plate 26.
  • the rolls 48 to 54, 58 to 63 and the reels 2 and 66 are brought up to speed.
  • the tension at roll 54 is built up to a value greater than the yield point but less than the ultimate strength of the strip and a matching tension is developed at roll 58. The tendency for the strip to strecth while in contact with rolls 54 and 58 is resisted by the frictional drag on these rolls.
  • the method of reducing the thickness of a strip which comprises passing the strip continuously around substantial arcs of .first and secondrotating work rolls with the unsupported length of strip between the rolls being a maximum of two inches, and applying tensional forces to the strip so that the tension on the strip around at least part of the arc of wrap of .the work rolls is above its yield point but below its ultimate strength whereby the thickness of the strip is reduced as it passes between the work rolls.
  • Apparatusfor reducing the thickn ess of a strip comprising a first housing, a second housing, a plurality of bridle rolls rotatably mounted in said first housing around which the strip passes in a tortuous path, a work roll rotatably mounted in said first housing at the exit end thereof with the strip passing around a substantial arc thereof, means driving all of said rolls at substantially the same peripheral velocities, a second work roll rotatably mounted in said second housing adjacent the first Work roll, means rotating said second work roll at a peripheral speed greater than that of said first work roll, a plurality of bridle rolls rotatably mounted in said second housing around which the strip passes in a tortuous path, means'driving the last named bridle rolls at substantially the same peripheral velocity as the second work roll, means for moving one of said housings to and away from the other of said housings to change the distance between the work rolls, and means holding the movable housing from movement when the work rolls are spaced a desired distance apart.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Metal Rolling (AREA)
US465115A 1965-06-18 1965-06-18 Method and apparatus for reducing strip Expired - Lifetime US3377830A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US465115A US3377830A (en) 1965-06-18 1965-06-18 Method and apparatus for reducing strip
GB24929/66A GB1150166A (en) 1965-06-18 1966-06-03 Method and Apparatus for Cold-Reducing Strip.
BE682460D BE682460A (is") 1965-06-18 1966-06-13
DE19661527881 DE1527881A1 (de) 1965-06-18 1966-06-14 Verfahren und Vorrichtung zur Reduzierung von Bandstaerken
FR65529A FR1483386A (fr) 1965-06-18 1966-06-15 Procédé et appareil pour réduire l'épaisseur d'un feuillard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US465115A US3377830A (en) 1965-06-18 1965-06-18 Method and apparatus for reducing strip

Publications (1)

Publication Number Publication Date
US3377830A true US3377830A (en) 1968-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US465115A Expired - Lifetime US3377830A (en) 1965-06-18 1965-06-18 Method and apparatus for reducing strip

Country Status (4)

Country Link
US (1) US3377830A (is")
BE (1) BE682460A (is")
DE (1) DE1527881A1 (is")
GB (1) GB1150166A (is")

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783667A (en) * 1971-04-14 1974-01-08 Ungerer Irma Apparatus for straightening metal by stretching
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
US4478064A (en) * 1982-03-04 1984-10-23 Olin Corporation Modifications to a cooperative rolling system for increasing _maximum attainable reduction per pass
US4781050A (en) * 1982-01-21 1988-11-01 Olin Corporation Process and apparatus for producing high reduction in soft metal materials

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808888C2 (de) * 1978-03-02 1983-03-10 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzanlage
SE462146B (sv) * 1984-06-28 1990-05-14 Brach Reiner Import Export Foerfarande och anordning foer riktning av ringar av varma band, saerskilt coilbox-ringar
WO1994029046A1 (de) * 1993-06-04 1994-12-22 Maschinenfabrik Niehoff Gmbh & Co. Kg Verfahren und vorrichtung zur querschnittsänderung von langgestrecktem gut
NL1003078C2 (nl) * 1996-05-10 1997-11-18 Vms Holding Ag Aangedreven ductiliteit-machine.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal
US2767602A (en) * 1952-03-13 1956-10-23 United States Steel Corp Cluster type edge rolling mill
US3253445A (en) * 1962-07-09 1966-05-31 Metal Box Co Ltd Apparatus for rolling strip metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal
US2767602A (en) * 1952-03-13 1956-10-23 United States Steel Corp Cluster type edge rolling mill
US3253445A (en) * 1962-07-09 1966-05-31 Metal Box Co Ltd Apparatus for rolling strip metal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783667A (en) * 1971-04-14 1974-01-08 Ungerer Irma Apparatus for straightening metal by stretching
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

Also Published As

Publication number Publication date
DE1527881A1 (de) 1970-02-05
GB1150166A (en) 1969-04-30
BE682460A (is") 1966-12-13

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