GB239402A - An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets - Google Patents

An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets

Info

Publication number
GB239402A
GB239402A GB27779/24A GB2777924A GB239402A GB 239402 A GB239402 A GB 239402A GB 27779/24 A GB27779/24 A GB 27779/24A GB 2777924 A GB2777924 A GB 2777924A GB 239402 A GB239402 A GB 239402A
Authority
GB
United Kingdom
Prior art keywords
swells
bend
sheet
dies
successive
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
GB27779/24A
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 claimed from DER59167D external-priority patent/DE436364C/en
Application filed by Individual filed Critical Individual
Priority to GB27779/24A priority Critical patent/GB239402A/en
Priority to FR589624D priority patent/FR589624A/en
Publication of GB239402A publication Critical patent/GB239402A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

239,402. Sjolander, C. G. L. Nov. 20, 1924. Straightening; dies.-Sheet metal, particularly of thickness up to 2 mm. and breadth up to 1.5 m., is levelled, flattened, or straightened by feeding intermittently and bending at each step alternatively in opposite directions, each successive bend being of less proportions than the preceding bend, and in each step causing each successive bend to overlap a portion of the previous bend so that the bends diminish progressively and are ultimately eliminated. The small buckles and surface strains are thus eliminated in addition to the large buckles. The sheet is fed step by step by rolls 16 between a pair of relatively movable dies 1, 2, which are respectively provided with swells 3-8 and 9-15, the swells on one die engaging with the grooves on the other die. The swells 3-6 and 10-13 progressively decrease in height and width and distance between successive swells, whereas the swells 7, 8 have an equal height and the swells 13, 14, 15 have an equal height and are separated from each other by a progressively increasing distance to neutralize the effects of smaller differences of thickness in the sheet. The sheet is fed forward by regular steps which do not coincide with the distances between the bending parts of the dies.
GB27779/24A 1922-12-06 1924-11-20 An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets Expired GB239402A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB27779/24A GB239402A (en) 1922-12-06 1924-11-20 An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets
FR589624D FR589624A (en) 1922-12-06 1924-11-25 Method and apparatus for straightening sheets

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1608910X 1922-12-06
DER59167D DE436364C (en) 1923-08-21 1923-08-21 Method and device for straightening sheet metal
GB27779/24A GB239402A (en) 1922-12-06 1924-11-20 An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets

Publications (1)

Publication Number Publication Date
GB239402A true GB239402A (en) 1925-09-10

Family

ID=27212218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27779/24A Expired GB239402A (en) 1922-12-06 1924-11-20 An improved process or method of and apparatus for levelling flattening or straightening sheet metal or metal sheets

Country Status (2)

Country Link
FR (1) FR589624A (en)
GB (1) GB239402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646102A (en) * 1949-03-15 1953-07-21 Nat Machinery Co Stock straightener for cold header devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646102A (en) * 1949-03-15 1953-07-21 Nat Machinery Co Stock straightener for cold header devices

Also Published As

Publication number Publication date
FR589624A (en) 1925-06-02

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