WO1991013706A1 - Procede d'incurvation de tuyaux - Google Patents

Procede d'incurvation de tuyaux Download PDF

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Publication number
WO1991013706A1
WO1991013706A1 PCT/FI1991/000067 FI9100067W WO9113706A1 WO 1991013706 A1 WO1991013706 A1 WO 1991013706A1 FI 9100067 W FI9100067 W FI 9100067W WO 9113706 A1 WO9113706 A1 WO 9113706A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
bending
bend
information
basis
Prior art date
Application number
PCT/FI1991/000067
Other languages
English (en)
Inventor
Johannes Tokola
Original Assignee
Johannes Tokola
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 Johannes Tokola filed Critical Johannes Tokola
Publication of WO1991013706A1 publication Critical patent/WO1991013706A1/fr
Priority to FI923992A priority Critical patent/FI923992A/fi

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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/12—Bending rods, profiles, or tubes with programme control
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/42—Recording and playback systems, i.e. in which the programme is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine
    • G05B19/4202—Recording and playback systems, i.e. in which the programme is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine preparation of the programme medium using a drawing, a model
    • G05B19/4207—Recording and playback systems, i.e. in which the programme is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine preparation of the programme medium using a drawing, a model in which a model is traced or scanned and corresponding data recorded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31033—Record on site dimensions of pipe, tube configuration, to install pipe
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31205—Remote transmission of measured values from site, local to host
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36283—Select, enter machining, cutting conditions, material file, tool file
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37403—Bending, springback angle
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45143—Press-brake, bending machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the present invention relates to the method defined in the introductory section of patent claim 1.
  • the methods known in the prior art for bending metal pipes and for determining their bending points are based on the planning of pipe routes, where the routing of the pipe is at the first stage defined on geometrical grounds only.
  • a drawback with the prior art methods is that they are inaccurate and time-consuming, because the geometrical definition of the pipe's routing does not alone secure the dimensional accuracy of the final bent pipe. Therefore, owing to the extension and spring-back taking place during the bending process, roughly 60 - 70 % of the time consumed in the preparation of the production is used for corrections, where the pipe plans are adapted to suit the production.
  • An iterative com ⁇ puter aided bending method has also been used.
  • Another drawback with the prior art methods is that, owing to their complicated nature, they offer chances to several human errors.
  • the object of the method of the present inven ⁇ tion is to eliminate the above mentioned drawbacks.
  • a particular object of the invention is to introduce a method which enables automatization at the planning and production stages of pipe bending.
  • Another object of the invention is to intro ⁇ quiz a method which utilizes real, experimental informa- tion of the behaviour of the pipe while bending.
  • Yet another object of the invention is to introduce a method which remarkably speeds up the plann ⁇ ing and bending of a pipe.
  • the method of the present invention is charac- terized by the novel features enlisted in the patent claim 1.
  • the geometrical information for the pipe such as the lengths of the straight parts and the bending radiuses and planes of the pipe angles;
  • the geometrical routing of the pipe is deter ⁇ mined by defining the coordinates of the bending points on the site of installation, or by directly measuring the lengths of the straight parts of the pipe, as well as the angles and planes of bend. A separate file can be created of the routing of the pipe.
  • the geometrical routing of the pipe is determined by means of vector operations, on the basis of the coordinates of the bending points.
  • the geometrical routing of the pipe is determined by first defining the coordinates of the bending points, and by then calculating, on the basis of these, the lengths of the straight parts, the angles of bend, the bending plane vectors, the angles between the bending planes, the handedness of the planes and the total sum of the angles of rotation of the bending planes.
  • the file is created on the basis of bending ex ⁇ periments, carried out with various size groups of pipes, various wall thicknesses and various bend angles, in order to determine the correlation between the actual bend angle and the target angle, as well as the spring- back.
  • the file is created on the basis of bending ex ⁇ periments with various pipe sizes, various wall thick ⁇ nesses and various angles of bend, in order to deter ⁇ mine the correlation between the initial length of the pipe blank and the length after the bending, as well as the bending extension.
  • a bending radius is chosen for the bending tool of the bending machine, and the real angle of bend for the chosen bending tools is defined on the basis of the desired angle of bend and the chosen pipe size and wall thickness, by utilizing the recorded spring-back infor ⁇ mation, corresponding to the pipe size and thickness, and the desired angle of bend.
  • the spring-back readings recorded in the file are interpo ⁇ lated and/or extrapolated.
  • the method in order to create the bending instructions there are calculated the successive real bending points for the bending machine by taking into account the extension information recorded in the file with respect to the pipe size and wall thickness, as well as to the desired angle of bend.
  • the spring-back readings recorded in the file are interpolated and/or extrapolated.
  • the total length of the straight pipe blank is calculated in order to create the bending instructions.
  • the locations of the limiter ⁇ to be programmed for the bending machine are calculated in order to create the bending instructions.
  • An advantage of the invention is that both the planning of the bending of the pipe, as well as the bending itself, can be automated.
  • the created files are most advantageously processed by using the process ⁇ ing and calculation programme designed according to the present invention.
  • This programme checks all steps of the method one by one in order to obtain the instruc ⁇ tions for bending the pipe, i.e a pipe route or part thereof, and further in order to realize the same. This procedure reduces the chances of human errors down to a minimum and speeds up both the planning and produc ⁇ tion processes.
  • Another advantage of the invention is that after bending, the ready-made pipe can be transported to the site of installation and installed without having to make any modifications.
  • a file for instance a database or a table, most advantageously of a type which can be stored into a computer's memory, to be used by a suitable processing and calculation programme.
  • the file is created only once and updated thereafter. If required, the experiments can always be carried out anew, for instance with new pipe sizes, and the file updated.
  • the coordinates of the bending points of the pipe are measured on the intended site of installation by means of theodolite measurement, and recorded in the memory of the measuring computer.
  • the coor- dinate readings are transmitted from the measuring computer to the processing computer proper, for instance directly from the site of measurement by means of a modem connection or data communications, on a datacar- rier such as a diskette, or in some other suitable fashion.
  • the standard information is re ⁇ corded in the tables (pipe sizes, respective spring- backs and extensions at different angles of bend) .
  • the initial readings can be obtained in many different ways.
  • the measured coor ⁇ dinates of the bending points are fed into the system, whereafter there are carried out some vector opera ⁇ tions, i.e. the lengths of the straight parts, the angles of bend, the vectors of the planes of bend, the angles between the planes of bend, the handedness of the planes and the summed-up angles of rotation of the planes of bend are calculated directly from the coordi ⁇ nates.
  • vector opera ⁇ tions i.e. the lengths of the straight parts, the angles of bend, the vectors of the planes of bend, the angles between the planes of bend, the handedness of the planes and the summed-up angles of rotation of the planes of bend are calculated directly from the coordi ⁇ nates.
  • the bend ⁇ ing information Thereafter begins the calculation of the bend ⁇ ing information, and there is first chosen the radius of the bending disk of the bending machine. Then the influence of the spring-back in the angle of bend is taken into account by utilizing the experimentally predetermined values recorded in the file.
  • the actual angle of bend for the chosen bending tool is defined on the basis of the desired angle of bend, as well as the chosen pipe size and wall thickness, with reference to the recorded spring-back information corresponding to the pipe size and wall thickness, as well as to the desired angle of bend. If the desired target angle is not found in the file as such, the corresponding values can be obtained by interpolating or extrapolating the recorded readings.
  • the successive actual bending points for the bending machine by taking into account the recorded extension information with respect to the pipe size and wall thickness, as well as to the desired angle of bend.
  • the intermediate and/or external readings are obtained as above, by means of interpolating or extrapolating the readings recorded in the file. Then it is tested whether the first and last elements of the pipe are sufficiently long, so that the limitations of the bending machine in question should not hinder bending. If they are not long enough, the lengths are increased.
  • the pipe contains junctions or flanges, they are treated separately. This is explained below. If the pipe does not contain junctions or flanges, the bending data is written out and recorded (for example in the memory of a computer) and the iso ⁇ metric images are drawn on a display screen or on paper by a plotter. Because the dimensions of the actual pipe routing are now determined, a list of required supplies can be created and written out, whereafter we can return to the main menu. The various steps of the method have now been gone through, and it is checked whether the created bending information is recorded. If not, it can be recorded, and the processing of the matter can be finished.

Abstract

Procédé de cintrage de tuyaux dans lequel on crée un fichier contenant les propriétés connues de détente et d'allongement de différents matériaux et dimensions de tuyauterie à des angles d'incurvation différents; on détermine le trajet du tuyau sur son site d'installation, en définissant, par exemple, les coordonnées des points d'incurvation ou en mesurant directement les longueurs ainsi que les angles et les plans d'incurvation de ses parties droites; sur la base du trajet prédéterminé, on définit une information géométrique concernant le tuyau comprenant les longueurs des parties droites ainsi que les rayons et les plans d'incurvation de ses angles; des instructions d'incurvation sont créées sur la base des informations relatives au matériau utilisé, incluant les informations concernant ses propriétés de détente et d'allongement et sur la base des informations concernant la géométrie calculée ou mesurée du tuyau ainsi que sa dimension; le tuyau est incurvé en fonction des instructions d'incurvation créées.
PCT/FI1991/000067 1990-03-07 1991-03-07 Procede d'incurvation de tuyaux WO1991013706A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI923992A FI923992A (fi) 1990-03-07 1992-09-07 Foerfarande foer bockning av roer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI901153A FI901153A (fi) 1990-03-07 1990-03-07 Foerfarande foer boejning av roer.
FI901153 1990-03-07

Publications (1)

Publication Number Publication Date
WO1991013706A1 true WO1991013706A1 (fr) 1991-09-19

Family

ID=8530019

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1991/000067 WO1991013706A1 (fr) 1990-03-07 1991-03-07 Procede d'incurvation de tuyaux

Country Status (5)

Country Link
EP (1) EP0518910A1 (fr)
AU (1) AU7343891A (fr)
CA (1) CA2077642A1 (fr)
FI (1) FI901153A (fr)
WO (1) WO1991013706A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760496A2 (fr) * 1995-08-29 1997-03-05 Hubert Niemann Méthode de détermination des dimensions de la tÔle brute pour capotes
EP0789289A3 (fr) * 1996-02-09 1998-10-21 Faro Technologies Inc. Méthode pour concevoir ou produire des tubes coudés
US5992210A (en) * 1997-11-17 1999-11-30 Eagle Precision Technologies Inc. Tube bending apparatus and method
EP1308223A2 (fr) * 2001-11-05 2003-05-07 SCHÜCO International KG Procédé de simulation de cintrage de profilés à trois rouleaux
EP1472627A2 (fr) * 2002-02-05 2004-11-03 GCC, Inc. Systeme et procede de dessin et de production de tubes coudes
EP1690609A1 (fr) * 1998-02-03 2006-08-16 Kabushiki Kaisha Opton Dispositif de cintrage
WO2010139394A1 (fr) * 2009-06-05 2010-12-09 Rosenberger Ag Procédé de cintrage de pièces allongées
US10613514B2 (en) 2011-05-25 2020-04-07 Greenlee Tools, Inc. Fabrication and tracking
CN115815367A (zh) * 2023-02-07 2023-03-21 江苏新恒基特种装备股份有限公司 一种基于成型参数的弯管壁厚质量预测方法和系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2064485A1 (de) * 1969-12-31 1971-07-22 Rolls Royce Verfahren zum Herstellen einer Kopie von einem rohr oder stangenförmigen Mo del!
US3653251A (en) * 1969-02-28 1972-04-04 British Aircraft Corp Ltd Pipe bending
DE2143692B2 (de) * 1971-09-01 1975-07-03 Rigobert Dipl.-Ing. 5000 Koeln Schwarze Numerisch gesteuerte Rohrbiegemaschine
US4161110A (en) * 1977-04-28 1979-07-17 EVG Entwicklungs- und Verwertungs-Gesellschaft mbH. Automatic control device for a bending machine
GB2235640A (en) * 1989-09-07 1991-03-13 Usui Kokusai Sangyo Kk Tube bending machine with programmed bending

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653251A (en) * 1969-02-28 1972-04-04 British Aircraft Corp Ltd Pipe bending
DE2064485A1 (de) * 1969-12-31 1971-07-22 Rolls Royce Verfahren zum Herstellen einer Kopie von einem rohr oder stangenförmigen Mo del!
DE2143692B2 (de) * 1971-09-01 1975-07-03 Rigobert Dipl.-Ing. 5000 Koeln Schwarze Numerisch gesteuerte Rohrbiegemaschine
US4161110A (en) * 1977-04-28 1979-07-17 EVG Entwicklungs- und Verwertungs-Gesellschaft mbH. Automatic control device for a bending machine
GB2235640A (en) * 1989-09-07 1991-03-13 Usui Kokusai Sangyo Kk Tube bending machine with programmed bending

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760496A3 (fr) * 1995-08-29 1998-08-26 Hubert Niemann Méthode de détermination des dimensions de la tÔle brute pour capotes
EP0760496A2 (fr) * 1995-08-29 1997-03-05 Hubert Niemann Méthode de détermination des dimensions de la tÔle brute pour capotes
EP0789289A3 (fr) * 1996-02-09 1998-10-21 Faro Technologies Inc. Méthode pour concevoir ou produire des tubes coudés
US5992210A (en) * 1997-11-17 1999-11-30 Eagle Precision Technologies Inc. Tube bending apparatus and method
EP1690609A1 (fr) * 1998-02-03 2006-08-16 Kabushiki Kaisha Opton Dispositif de cintrage
EP1308223A2 (fr) * 2001-11-05 2003-05-07 SCHÜCO International KG Procédé de simulation de cintrage de profilés à trois rouleaux
EP1308223A3 (fr) * 2001-11-05 2004-09-22 SCHÜCO International KG Procédé de simulation de cintrage de profilés à trois rouleaux
EP1472627A2 (fr) * 2002-02-05 2004-11-03 GCC, Inc. Systeme et procede de dessin et de production de tubes coudes
EP1472627A4 (fr) * 2002-02-05 2007-05-23 Gcc Inc Systeme et procede de dessin et de production de tubes coudes
US7305274B2 (en) 2002-02-05 2007-12-04 Gcc, Inc. System and method for drawing and manufacturing bent pipes
WO2010139394A1 (fr) * 2009-06-05 2010-12-09 Rosenberger Ag Procédé de cintrage de pièces allongées
US10613514B2 (en) 2011-05-25 2020-04-07 Greenlee Tools, Inc. Fabrication and tracking
US11269310B2 (en) 2011-05-25 2022-03-08 Greenlee Tools, Inc. Fabrication and tracking
US11733675B2 (en) 2011-05-25 2023-08-22 Greenlee Tools, Inc. Fabrication and tracking
CN115815367A (zh) * 2023-02-07 2023-03-21 江苏新恒基特种装备股份有限公司 一种基于成型参数的弯管壁厚质量预测方法和系统

Also Published As

Publication number Publication date
EP0518910A1 (fr) 1992-12-23
FI901153A (fi) 1991-09-08
CA2077642A1 (fr) 1991-09-08
AU7343891A (en) 1991-10-10
FI901153A0 (fi) 1990-03-07

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