EP1214990B1 - Machine and process for straightening pieces of small cross section and great length - Google Patents

Machine and process for straightening pieces of small cross section and great length Download PDF

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Publication number
EP1214990B1
EP1214990B1 EP20010201470 EP01201470A EP1214990B1 EP 1214990 B1 EP1214990 B1 EP 1214990B1 EP 20010201470 EP20010201470 EP 20010201470 EP 01201470 A EP01201470 A EP 01201470A EP 1214990 B1 EP1214990 B1 EP 1214990B1
Authority
EP
European Patent Office
Prior art keywords
piece
straightening
mentioned
machine
clamps
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
EP20010201470
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1214990A2 (en
EP1214990A3 (en
Inventor
Luigi Galdabini
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.)
Cesare Galdabini SpA
Original Assignee
Cesare Galdabini SpA
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Filing date
Publication date
Application filed by Cesare Galdabini SpA filed Critical Cesare Galdabini SpA
Publication of EP1214990A2 publication Critical patent/EP1214990A2/en
Publication of EP1214990A3 publication Critical patent/EP1214990A3/en
Application granted granted Critical
Publication of EP1214990B1 publication Critical patent/EP1214990B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Definitions

  • the object of this invention is a machine as well as a process performed by using said machine, destined for straightening pieces of small cross section and great length.
  • Typical examples of pieces of small cross section and great length are profiles of an l, C, I or T shape and of a square, rectangular or any other form of a size up to 100 mm and length up to 10 meters.
  • the profiles have an initial deformation of a flexing or twisting type derived from the fabricating process, such as for instance produced by the internal tensions, which are induced by the heat treating process of quenching, which must be eliminated before being rectified.
  • the straightening is carried out by applying a flexing or twisting moment to the piece, so as to produce a plastic deformation and the ensuing tensions sufficient to compensate those present in the piece.
  • the required straightening tolerances are typically in the order of 0.1 mm/meter, so as to minimize the material to be removed in the subsequent rectifying operation.
  • the process is carried out by alternating measuring phases with straightening phases commensurate with the measured errors.
  • the machine utilized to this date comprises a mechanical structure constituted by a mobile bench and a cross beam, an error measuring and controlling system and some appropriate equipment.
  • the equipment consists of a series of supports and punches in a number adequate for the required type of deformations of the piece to be straightened, mounted respectively on the base and on the cross beam and appropriately installed based on the measured deformations, so as to produce, by the motion of the cross beam, the deformations required by the straightening process.
  • the pieces are first straightened on one side and then rotated to the other.
  • a bending and straightening machine is provided for long material to be straightened and has straightening abutments which are arranged at a distance from one another in the longitudinal direction of the material to be straightened and between which are arranged straightening rams.
  • the purpose of this invention is therefore to implement a machine and a straightening process capable of solving the mentioned problems.
  • Another purpose of the invention is to produce a machine for a simple and inexpensive straightening process, capable of operating in a fast, effective and precise manner.
  • the further object of the invention is a process for straightening pieces of small cross section and great length.
  • the machine 10 consists essentially of a feeding and advancing system for the piece, a system for applying the force, and a system for measuring and controlling the process.
  • the machine 10 offers a feeding system for the pieces 11 to be straightened, constituted by a pair of mobile clamps 12 and 13.
  • a supporting roller 14, 15 and a probe 17, 18 is provided next to each clamp, so as to operate as a measuring device, in combination with a third probe 22 set up along the axis of the punch.
  • the clamps 12, 13, are always moving symmetrically in relation with the axis of the machine, thanks to a servomotor and a toothed belt 16, on which the clamps 12, 13 are respectively engaged with the parts 12', 13' and the respective probes 17, 18 move together with said servomotor and said belt 16.
  • Each of the supports 14, 15 carries an optical sensor unit 20, 21 which forms a sensing barrier and is designed to detect the presence of the piece 11 to be straightened.
  • the piece 11 to be straightened is initially positioned with one of its extremities inside the sensor barrier, as shown in Figure 1.
  • the supports are slightly shifted toward the outside, so that the extremity of the piece 11 is positioned halfway across the support 12.
  • the piece 11 is moved to such a position as to reach the second clamp 13, as shown for exampie in Figure 2; this position is subsequently recorded as a zero position, by using the optical sensor unit 18 of the second clamp 13.
  • the piece 11 is held in position by the two clamps 12, 13, while the first extremity of the piece 11 is kept at a predetermined distance from the optical sensor unit.
  • This motion is achieved as follows: opening of the clamp 13, shifting of the clamps 12, 13 toward the center of the machine 10, closing of the clamp 13, opening of the clamp 12, shifting of the clamps 12, 13 in an opposite direction, and closing of the clamp 12.
  • the procedure described above may be repeated as often as required, until reaching the final section to be straightened.
  • the piece is first straightened along one plane, for all the sections involved and by the process described above, and then rotated by 90° so as to be further straightened in all the sections along the second straightening plane.
  • the stroke length of the punch is commensurate with the error measured.
  • the process also takes care of measuring the deformation of the profile section under work, the calculation of the stroke for the punch, the application of the deforming force, a new measurement of the deformation of the piece, and the eventual repetition of the cycle until reaching the desired tolerances.
  • the punch may apply the deforming force in either a pushing or pulling mode, depending on the curvature of the piece.
  • the machine according to the invention makes it possible to achieve the stepwise straightening of the piece, while preventing a simultaneous straightening along the entire length of the piece 11.
  • the materials, the shapes and sizes of the details illustrated may be of any kind, depending on the requirements, and the same may easily be replaced with others of a technically equivalent type.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Wire Processing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20010201470 2000-12-15 2001-04-23 Machine and process for straightening pieces of small cross section and great length Expired - Lifetime EP1214990B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2000MI002720 IT1319553B1 (it) 2000-12-15 2000-12-15 Macchina e procedimento per la raddrizzatura di pezzi di piccolasezione ed elevata lunghezza
ITMI20002720 2000-12-15
ITMI202720 2000-12-15

Publications (3)

Publication Number Publication Date
EP1214990A2 EP1214990A2 (en) 2002-06-19
EP1214990A3 EP1214990A3 (en) 2003-10-29
EP1214990B1 true EP1214990B1 (en) 2005-07-20

Family

ID=11446241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010201470 Expired - Lifetime EP1214990B1 (en) 2000-12-15 2001-04-23 Machine and process for straightening pieces of small cross section and great length

Country Status (3)

Country Link
EP (1) EP1214990B1 (it)
DE (1) DE60112026T2 (it)
IT (1) IT1319553B1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756018A (zh) * 2012-07-19 2012-10-31 张家港华东锅炉有限公司 单支鳍片换热管旁弯校正装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2873601B1 (fr) * 2004-07-29 2007-12-28 D Equipement De Modernisation Machine a redresser les fers
EP2331272B1 (en) * 2008-08-25 2022-01-12 Monteferro S.p.A. Production line for lift guides and similar products and productive process for making thereof
JP5782877B2 (ja) * 2011-07-11 2015-09-24 Ｊｆｅスチール株式会社 曲げ癖矯正方法、該曲げ癖矯正方法を用いた断面溝形形状を有する部材の成形方法
CN104338804A (zh) * 2014-10-29 2015-02-11 倪荣琴 可移动式校直机
CN105537324B (zh) * 2014-10-30 2017-09-22 五冶集团上海有限公司 球团双层滚筛筛辊矫直装置及其使用方法
CN107529459B (zh) * 2017-10-10 2019-04-12 芜湖美奥机械科技有限公司 一种空调压缩机主壳体辅助制备机
CN112872109B (zh) * 2021-02-04 2023-05-16 浙江久立特材科技股份有限公司 一种异型管材的整形装置
CN113059029A (zh) * 2021-03-12 2021-07-02 重庆市永川区中川科技发展有限责任公司 用于长直轴的矫直机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE903396C (de) * 1951-09-07 1954-02-04 Esco Sa Mechanique Generale De Verfahren und Vorrichtung zum Richten drahtartigen Werkstoffes auf einer selbsttaetign Drehbank
DE1141160B (de) * 1956-05-08 1962-12-13 Aerofin Corp Rohrrichtmaschine
DE2328111A1 (de) * 1973-06-01 1974-12-19 Hans Lindemann Richtmaschine fuer strangfoermige werkstuecke
DE3927465A1 (de) * 1989-08-19 1991-02-21 Mae Maschinen U Apparatebau Go Biegerichtmaschine fuer langgestrecktes richtgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756018A (zh) * 2012-07-19 2012-10-31 张家港华东锅炉有限公司 单支鳍片换热管旁弯校正装置

Also Published As

Publication number Publication date
ITMI20002720A1 (it) 2002-06-15
IT1319553B1 (it) 2003-10-20
EP1214990A2 (en) 2002-06-19
DE60112026D1 (de) 2005-08-25
EP1214990A3 (en) 2003-10-29
DE60112026T2 (de) 2006-05-18

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