EP1566229A1 - Method for flattening a portion of a tubular element - Google Patents

Method for flattening a portion of a tubular element Download PDF

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Publication number
EP1566229A1
EP1566229A1 EP05100742A EP05100742A EP1566229A1 EP 1566229 A1 EP1566229 A1 EP 1566229A1 EP 05100742 A EP05100742 A EP 05100742A EP 05100742 A EP05100742 A EP 05100742A EP 1566229 A1 EP1566229 A1 EP 1566229A1
Authority
EP
European Patent Office
Prior art keywords
tubular element
deformed
longitudinal portions
opposed
flattened
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.)
Withdrawn
Application number
EP05100742A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giuliano Marini
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.)
RETI GRITTI SpA
Original Assignee
RETI GRITTI SpA
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 RETI GRITTI SpA filed Critical RETI GRITTI SpA
Publication of EP1566229A1 publication Critical patent/EP1566229A1/en
Withdrawn legal-status Critical Current

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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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B21D41/045—Closing

Definitions

  • the object of the present invention is a method for flattening a portion of a tubular element, in particular but not exclusively, adapted for obtaining a bending support of a sunbed, a deck chair or similar item.
  • said flattened portions are obtained by squashing the ends of the tubular element.
  • a plate is obtained in this way, having a thickness equal to about twice the thickness of the initial tubular element. Said plate is then drilled and optionally cut or shaped, according to its use.
  • the object of the present invention is to meet such need in a simple, low-cost way without the addition of material or other external means.
  • the object is achieved, according to the invention, with a method for flattening a tubular element which provides for the radial deformation of said portion of tubular element by applying two radial forces on two longitudinal portions opposed relative to the main axis of the tubular element, so as to cause an approach of said two longitudinal portions leaving the remaining opposed parts of the portion to be flattened substantially non-deformed, and for squashing the portion of tubular element on said non-deformed parts with two mutually opposed forces and directed orthogonally relative to the radial forces.
  • a flattened portion is obtained in this way, having a thickness substantially equal to four times the thickness of the tubular element, or twice that of the current plates.
  • the fact of radially deforming the portion of tubular element with two opposed and converging forces before it is squashed allows reducing also the final overall dimensions of the flattened portion compared to what is possible with the current processing method.
  • FIGS. 1, 1a and 1b schematically show the method for flattening a portion of a tubular element
  • figure 2 shows a front view of the flattened end of a tubular element
  • figure 3 shows the same flattened end in a side view
  • figure 5 shows a perspective of a bending support of a sunbed having the ends flattened by the method of the invention.
  • reference numeral 10 denotes a plan view of a portion of a tubular element 11, for example with circular section, that must be flattened.
  • the tubular element 11 for example, could be intended for obtaining a bending support for a sunbed, as shown in figure 5.
  • the method of the present invention provides for the radial deformation of said portion 10 of the tubular element 11 by applying two opposed and converging radial forces F on two diametrically opposed longitudinal portions 12 of portion 10.
  • forces F must be preferably applied on very narrow longitudinal portions 12, tending to a line.
  • forces F must be such as to push the longitudinal portions 12 inwards until they touch each other at the level of the tubular element axis.
  • this squashing is such as to make the radially deformed longitudinal portions 12 and parts 13 deformed by squashing parallel and adjacent.
  • the resulting flattened portion denoted with reference numeral 14, virtually along its entire cross section, exhibits a thickness substantially equal to four times the thickness of the tubular element, as is clear in particular in figure 1b.
  • the flattened portion 14 can then be drilled and optionally cut so as to obtain the desired shape according to its use, as shown in the examples of figures 2, 3 and 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP05100742A 2004-02-20 2005-02-03 Method for flattening a portion of a tubular element Withdrawn EP1566229A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20040021 ITBS20040021A1 (it) 2004-02-20 2004-02-20 Metodo per appiattire una porzione di un elemento tubolare
ITBS20040021 2004-02-20

Publications (1)

Publication Number Publication Date
EP1566229A1 true EP1566229A1 (en) 2005-08-24

Family

ID=34708511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05100742A Withdrawn EP1566229A1 (en) 2004-02-20 2005-02-03 Method for flattening a portion of a tubular element

Country Status (2)

Country Link
EP (1) EP1566229A1 (it)
IT (1) ITBS20040021A1 (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8490987B2 (en) 2008-09-25 2013-07-23 Mitsubishi Steel Mfg. Co., Ltd. Stabilizer bar
WO2019193099A1 (en) * 2018-04-05 2019-10-10 Hydro Extruded Solutions As Strut and method of manufacturing a strut

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB121352A (en) * 1917-12-14 1918-12-16 Rudge Whitworth Ltd A New or Improved Method of Trapping the Ends of Metal Tubes.
DE19857589A1 (de) * 1997-12-15 1999-07-15 Honsel Profilprodukte Gmbh Aufprallträger für Fahrzeugtüren und Verfahren zu seiner Herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB121352A (en) * 1917-12-14 1918-12-16 Rudge Whitworth Ltd A New or Improved Method of Trapping the Ends of Metal Tubes.
DE19857589A1 (de) * 1997-12-15 1999-07-15 Honsel Profilprodukte Gmbh Aufprallträger für Fahrzeugtüren und Verfahren zu seiner Herstellung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8490987B2 (en) 2008-09-25 2013-07-23 Mitsubishi Steel Mfg. Co., Ltd. Stabilizer bar
WO2019193099A1 (en) * 2018-04-05 2019-10-10 Hydro Extruded Solutions As Strut and method of manufacturing a strut
CN112074356A (zh) * 2018-04-05 2020-12-11 海德鲁挤压解决方案股份有限公司 支柱和制造支柱的方法
JP2021519695A (ja) * 2018-04-05 2021-08-12 ヒドロ・エクストゥルーデッド・ソリューションズ・アーエスＨｙｄｒｏ Ｅｘｔｒｕｄｅｄ Ｓｏｌｕｔｉｏｎｓ Ａｓ ストラット及びストラットを製造する方法
US11786955B2 (en) 2018-04-05 2023-10-17 Hydro Extruded Solutions As Strut and method of manufacturing a strut

Also Published As

Publication number Publication date
ITBS20040021A1 (it) 2004-05-20

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