EP0767016A2 - Procédé et dispositif pour mesurer des rayons de pièces cintrées - Google Patents

Procédé et dispositif pour mesurer des rayons de pièces cintrées Download PDF

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Publication number
EP0767016A2
EP0767016A2 EP96115724A EP96115724A EP0767016A2 EP 0767016 A2 EP0767016 A2 EP 0767016A2 EP 96115724 A EP96115724 A EP 96115724A EP 96115724 A EP96115724 A EP 96115724A EP 0767016 A2 EP0767016 A2 EP 0767016A2
Authority
EP
European Patent Office
Prior art keywords
guide
roller
slide
bending
curvature
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.)
Granted
Application number
EP96115724A
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German (de)
English (en)
Other versions
EP0767016B1 (fr
EP0767016A3 (fr
Inventor
Alois Adelhof
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0767016A2 publication Critical patent/EP0767016A2/fr
Publication of EP0767016A3 publication Critical patent/EP0767016A3/fr
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Publication of EP0767016B1 publication Critical patent/EP0767016B1/fr
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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die

Definitions

  • the invention relates to a method for determining radii in the case of bent parts which determine two cylinder surfaces, an inner cylinder surface facing a center of curvature and a second outer cylinder surface facing away from it.
  • the invention also relates to a device which is particularly suitable for this method.
  • a portable device for bending pipes can be found, for example, in DE-PS 32 09 539.
  • the curvature can be measured, for example, by hand using a three-point measuring device.
  • the cylinder surface facing the center point has an arc length which is smaller in proportion to the curvature and the object width than the other equidistantly curved cylinder surface facing away from the center point. It is true that radii of curved objects can be determined, for example, using the so-called three-point measuring method, strain gauges and measuring methods in which - touching or without contact - several points of a contour are detected and the radius is calculated therefrom; however, many of these methods are either relatively imprecise or tied to constraints that are difficult to meet in practice.
  • the inventor has set himself the goal of developing a measuring method and a device for this, with the aid of which the radius of the arc of bent parts can be determined by means of fewer and easily ascertainable geometric sizes.
  • the length of the radius of the inner cylinder surface closer to the center of curvature is determined as a quotient from the radial distance between the two cylinder surfaces as a dividend and a divisor which is the difference of the quotient of the arc length of the outer cylinder surface by the arc length of the inner cylinder surface minus the subtrahend 1.
  • the three geometric variables are determined by means of two - preferably identical - friction wheel rotary encoder units which are arranged opposite one another; each of these units is mounted on a separate slide, and both slides can be moved independently on a common linear guide.
  • a force accumulator in particular a compression spring, is assigned to each of these slides. Thanks to this provision, the friction wheels are continuously in contact with the bent object; this is located between the two friction wheels described. That continuous installation of the friction wheels is supported by the proviso that the compression spring of the outer slide is equipped with a higher force than the compression spring of the inner slide.
  • the arc lengths can be measured without a radial alignment of the guide bar when bending in several forming stages. Since the position of the bent part relative to the friction wheel encoder units remains constant during a forming step, two arc lengths belonging together are measured, which enable a determination of the radius.
  • three sensors record the following values: the arc length La of the outer side surface 12; the arc length Li of the inner side surface 14 such as the mentioned rod width b as the radial distance of the arc lengths La, Li from each other.
  • the three geometric variables are recorded in such a way that the arc lengths La, Li are determined by means of an outer and an inner friction wheel rotary encoder 16 and 18, and the distance b between the two cylinder or side surfaces 12, 14 is determined by a potentiometric displacement sensor will.
  • the friction wheel rotary encoders 16, 18 are located on two slides 20, 20 i , which can move independently of one another on a linear guide 22 oriented radially to the arc segment.
  • a continuous application of the friction wheels 17 of that friction wheel encoder units 16,18 at those side faces 12,14 is achieved i with two compression springs 24,24, the i are supported in each case at one end to the carriage 24 and 24 respectively. Since the outer compression spring 24 exerts a higher force on its slide 20 than the inner compression spring 24 i on the inner slide 20 i , a continuous application of guide rollers 26 on the curved rod 10 is achieved at the same time.
  • the guide rollers 26 are fixed at the ends of two side arms of a guide tree 30 which is T-shaped in plan view and whose central bar forms that linear guide 22, each of which is offered by a part of a guide bar 28.
  • the necessary radial alignment thereof is achieved with the guide beam 28 projecting at right angles from it, from the free ends of which a bearing arm 32 for those guide rollers 26, which is parallel to the linear guide, projects.
  • the exemplary embodiment in FIG. 2 shows the measuring device for detecting the two arc lengths of the bent part integrated in a typical three-roll bending machine with bending rolls 35 to 37.
  • the main difference from the embodiment in FIG. 1 is that the measuring unit in FIG. 2 does not have a guide bar 22 with guide rollers 26 which, in the other embodiment, ensures the continuous radial alignment of the measuring unit on the bent part.
  • the common linear guide 22 is attached to the machine body after prior alignment either in adjustable - or non-adjustable - steps.
  • the linear guide 22 can either be seen behind the bending roller 37 or even just before the bending roller 37 in the feed direction x, ie it can be positioned in the space between the central roller 35 and the bending roller 37.
  • the bending roller 37 is fed during bending processes in which the finished contour of the bent part is produced in several steps so that the distance between the bending roller 37 and the central roller 35 is reduced.
  • the bending radius changes from Ri to Ro ⁇ Ri.
  • the arrangement of the bent part remains relative to that during the rest of the bending process Bending rolls 35 to 37 and in particular unchanged to the measuring unit.
  • the associated arc lengths La and Li are recorded with the unit shown, without this unit having to be aligned radially on the bent part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP19960115724 1995-10-04 1996-10-01 Procédé et dispositif pour mesurer des rayons de pièces cintrées Expired - Lifetime EP0767016B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19536938 1995-10-04
DE19536938 1995-10-04

Publications (3)

Publication Number Publication Date
EP0767016A2 true EP0767016A2 (fr) 1997-04-09
EP0767016A3 EP0767016A3 (fr) 1997-12-03
EP0767016B1 EP0767016B1 (fr) 1999-06-02

Family

ID=7773990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960115724 Expired - Lifetime EP0767016B1 (fr) 1995-10-04 1996-10-01 Procédé et dispositif pour mesurer des rayons de pièces cintrées

Country Status (2)

Country Link
EP (1) EP0767016B1 (fr)
DE (1) DE19602504A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20090215A1 (it) * 2009-05-06 2010-11-07 Cml Int Spa Macchina per curvare in modo continuo un pezzo allungato secondo raggi predeterminati
ITMI20101124A1 (it) * 2010-06-22 2011-12-23 Crippa Spa Procedimento per la curvatura di tubi, fili o nastri di metallo a serpentina o a molla e macchinaper curva tubi, fili o nastri di metallo per la fabbricazione di una serpentina o una molla presentante un andamento ad elica comprendente una pluralità
ITTO20130936A1 (it) * 2013-11-19 2015-05-20 Cte Sistemi Srl Gruppo di misura per misurare il raggio di curvatura e l'avanzamento in una macchina curvatrice, in particolare in una macchina curvatrice per la curvatura di conduttori per bobine superconduttive
CN113884958A (zh) * 2021-09-27 2022-01-04 中国科学院合肥物质科学研究院 一种测量超导带材临界侧弯半径的装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016013144A1 (de) * 2016-10-31 2018-05-03 Technische Universität Dortmund Vorrichtung zur taktilen Erfassung und Analyse der Geometrie von gebogenen Profilen oder Rohren
DE102020127164B3 (de) 2020-10-15 2021-07-15 Jenoptik Industrial Metrology Germany Gmbh Radialkraft-Vorrichtung für ein Konturmessgerät und Messsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041212A1 (de) * 1980-11-03 1982-05-13 August Wilhelm 5901 Wilnsdorf Schäfer Vorrichtung zum biegen, insbesondere runden von blechen oder profilen
GB2087561A (en) * 1980-11-11 1982-05-26 Smt Pullmax Apparatus for measuring the curvature of a single-curved surface
DE3209536A1 (de) * 1981-03-16 1982-10-14 C.M.L. Costruzioni Meccaniche Liri S.R.L., Piedimonte San Germano, Frosinone Tragbare, elektromechanisch gesteuerte rohrbiegevorrichtung
DE4225878A1 (de) * 1992-08-05 1994-02-10 Bayer Isolierglasfab Kg Verfahren und Vorrichtung zum Biegen eines im wesentlichen teilkreisförmigen Bogens an einem Abstandhalterprofil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH572200A5 (fr) * 1973-09-18 1976-01-30 Haeusler Christian Ag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041212A1 (de) * 1980-11-03 1982-05-13 August Wilhelm 5901 Wilnsdorf Schäfer Vorrichtung zum biegen, insbesondere runden von blechen oder profilen
GB2087561A (en) * 1980-11-11 1982-05-26 Smt Pullmax Apparatus for measuring the curvature of a single-curved surface
DE3209536A1 (de) * 1981-03-16 1982-10-14 C.M.L. Costruzioni Meccaniche Liri S.R.L., Piedimonte San Germano, Frosinone Tragbare, elektromechanisch gesteuerte rohrbiegevorrichtung
DE4225878A1 (de) * 1992-08-05 1994-02-10 Bayer Isolierglasfab Kg Verfahren und Vorrichtung zum Biegen eines im wesentlichen teilkreisförmigen Bogens an einem Abstandhalterprofil

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20090215A1 (it) * 2009-05-06 2010-11-07 Cml Int Spa Macchina per curvare in modo continuo un pezzo allungato secondo raggi predeterminati
CN101879542A (zh) * 2009-05-06 2010-11-10 Cml国际有限公司 一种以预定半径连续弯曲长工件的机器
EP2248611A1 (fr) * 2009-05-06 2010-11-10 CML International S.P.A. Dispositif de cintrage pour cintrer un élément allongé selon des rayons de courbure prédéfinis
CN101879542B (zh) * 2009-05-06 2013-04-24 Cml国际有限公司 一种以预定半径连续弯曲长工件的机器
ITMI20101124A1 (it) * 2010-06-22 2011-12-23 Crippa Spa Procedimento per la curvatura di tubi, fili o nastri di metallo a serpentina o a molla e macchinaper curva tubi, fili o nastri di metallo per la fabbricazione di una serpentina o una molla presentante un andamento ad elica comprendente una pluralità
EP2399688A1 (fr) * 2010-06-22 2011-12-28 Crippa S.P.A. Procédé et dispositif d'enroulement de tube, fil ou bande métallique en un élément ou un ressort hélicoidal à plusieurs spires
CN104646451A (zh) * 2013-11-19 2015-05-27 Cte斯特米股份责任有限公司 测量单元
EP2873943A2 (fr) 2013-11-19 2015-05-20 CTE Sistemi S.r.l. Unité de mesure pour mesurer le rayon de courbure et l'acheminement d'une pièce à usiner dans une machine à cintrer
ITTO20130936A1 (it) * 2013-11-19 2015-05-20 Cte Sistemi Srl Gruppo di misura per misurare il raggio di curvatura e l'avanzamento in una macchina curvatrice, in particolare in una macchina curvatrice per la curvatura di conduttori per bobine superconduttive
JP2015098053A (ja) * 2013-11-19 2015-05-28 チティエ スィステミ ソシエタ アレスポンサビリタ リミタータ 曲げ加工機におけるワークの曲げ半径及び送りの測定のための測定ユニット
EP2873943A3 (fr) * 2013-11-19 2015-08-12 CTE Sistemi S.r.l. Unité de mesure pour mesurer le rayon de courbure et l'acheminement d'une pièce à usiner dans une machine à cintrer
EP3051251A1 (fr) * 2013-11-19 2016-08-03 CTE Sistemi S.r.l. Unité de mesure pour mesurer l'acheminement d'une pièce à usiner dans une machine à cintrer
CN104646451B (zh) * 2013-11-19 2018-05-04 Cte斯特米股份责任有限公司 测量单元
US10092937B2 (en) 2013-11-19 2018-10-09 Cte Sistemi S.R.L. Measuring unit for measuring the bending radius and the forwarding of a workpiece in a bending machine
EP3540366A1 (fr) * 2013-11-19 2019-09-18 CTE Sistemi S.r.l. Unité de mesure pour mesurer l'acheminement d'une pièce à usiner dans une machine à cintrer
RU2705047C2 (ru) * 2013-11-19 2019-11-01 СиТиЭ СИСТЕМИ С.р.л. Измерительное устройство для измерения радиуса изгиба и подачи заготовки в гибочном станке
CN113884958A (zh) * 2021-09-27 2022-01-04 中国科学院合肥物质科学研究院 一种测量超导带材临界侧弯半径的装置及方法
CN113884958B (zh) * 2021-09-27 2023-07-25 中国科学院合肥物质科学研究院 一种测量超导带材临界侧弯半径的装置及方法

Also Published As

Publication number Publication date
EP0767016B1 (fr) 1999-06-02
DE19602504A1 (de) 1997-04-10
EP0767016A3 (fr) 1997-12-03

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