GB1262577A - Improvements in or relating to methods of permanently elongating strip - Google Patents

Improvements in or relating to methods of permanently elongating strip

Info

Publication number
GB1262577A
GB1262577A GB9555/69A GB955569A GB1262577A GB 1262577 A GB1262577 A GB 1262577A GB 9555/69 A GB9555/69 A GB 9555/69A GB 955569 A GB955569 A GB 955569A GB 1262577 A GB1262577 A GB 1262577A
Authority
GB
United Kingdom
Prior art keywords
strip
equations
strain
tensile
bend
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
Application number
GB9555/69A
Inventor
Martin G Kinnavy
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.)
HERR EQUIPMENT CORP
Original Assignee
HERR EQUIPMENT 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 HERR EQUIPMENT CORP filed Critical HERR EQUIPMENT CORP
Publication of GB1262577A publication Critical patent/GB1262577A/en
Expired legal-status Critical Current

Links

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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Paper (AREA)
  • Tires In General (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Package Frames And Binding Bands (AREA)

Abstract

1,262,577. Stretching. HERR EQUIPMENT CORP. 21 Feb., 1969 [28 Feb., 1968], No. 9555/69. Heading B3E. A method of permanently elongating metal strip comprises applying tension to the strip and constraining the tensioned strip to at least one bend and at least one bend reversal such that yielding occurs on at least one side of the strip and such that on the first and all subsequent bend reversals the slope of that portion of the stress distribution curve for tensile and compressive stresses less than the tensile or compressive yield stress respectively reflects both the immediate previous bending strain and the existing bending strain reversal but is otherwise independent of bending strain history. Equations are given which show the relation between elongation strain and the applied tensile force for successive bends of specified radii on a strip of specified thickness and tensile yield strain; the equations taking into account yielding at one or both sides of the strip at one or both of two successive bends. Examples of the application of these equations to a strip are given in which the values for elongation strain and tensile force were measured using the apparatus shown in Fig. 8 in which tension is applied to a strip 11 by an hydraulic cylinder 12 and measured by gauges 13 and 14 at each end of the strip. Bending strains are applied by rolls 17, 18 and 19 carried on a cart 20 running on a smooth track 21. A gauge length (50 inches) is marked on the strip, tension applied and the strip elongated by moving the cart with its rolls along the strip. The elongations obtained by measuring the distance between the gauge marks after stretching are in close agreement with those obtained from the equations given.
GB9555/69A 1968-02-28 1969-02-21 Improvements in or relating to methods of permanently elongating strip Expired GB1262577A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70894768A 1968-02-28 1968-02-28

Publications (1)

Publication Number Publication Date
GB1262577A true GB1262577A (en) 1972-02-02

Family

ID=24847817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9555/69A Expired GB1262577A (en) 1968-02-28 1969-02-21 Improvements in or relating to methods of permanently elongating strip

Country Status (9)

Country Link
US (1) US3552175A (en)
BE (1) BE729187A (en)
DE (1) DE1909481A1 (en)
ES (1) ES364016A1 (en)
FR (1) FR2002842A1 (en)
GB (1) GB1262577A (en)
NL (1) NL6903094A (en)
NO (1) NO138241C (en)
SE (1) SE359038B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688539A (en) * 1971-05-07 1972-09-05 Harold P Hogarth Apparatus for straightening metallic fishing rod mandrels and method of using same
DE2911983C2 (en) * 1979-03-27 1986-03-20 Mannesmann AG, 4000 Düsseldorf Device for regulating systems for stretch-bending and straightening continuously passing strips
US4614101A (en) * 1981-12-01 1986-09-30 Herr-Voss Corporation Method of rewinding slit metal strands
US4970886A (en) * 1989-08-21 1990-11-20 Aluminum Company Of America Stretch shaping method and apparatus
FR2782463B1 (en) * 1998-08-24 2000-09-29 Pechiney Rhenalu PROCESS FOR IMPROVING THE PLANEITY OF A METAL SHEET
US20100162784A1 (en) * 2008-12-31 2010-07-01 Buta John R Flattening device

Also Published As

Publication number Publication date
US3552175A (en) 1971-01-05
ES364016A1 (en) 1971-01-01
BE729187A (en) 1969-08-01
SE359038B (en) 1973-08-20
NO138241B (en) 1978-04-24
DE1909481A1 (en) 1969-09-25
FR2002842A1 (en) 1969-10-31
NL6903094A (en) 1969-09-01
NO138241C (en) 1978-08-02

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