EP1308223A2 - Procédé de simulation de cintrage de profilés à trois rouleaux - Google Patents

Procédé de simulation de cintrage de profilés à trois rouleaux Download PDF

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Publication number
EP1308223A2
EP1308223A2 EP02024630A EP02024630A EP1308223A2 EP 1308223 A2 EP1308223 A2 EP 1308223A2 EP 02024630 A EP02024630 A EP 02024630A EP 02024630 A EP02024630 A EP 02024630A EP 1308223 A2 EP1308223 A2 EP 1308223A2
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EP
European Patent Office
Prior art keywords
bending
roll
curvature
incoming
outgoing
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
EP02024630A
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German (de)
English (en)
Other versions
EP1308223B1 (fr
EP1308223A3 (fr
Inventor
Bernhard Prof. Dr. Adams
Alexandre Mamoutov
Bernd Diekmann
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.)
Schueco International KG
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Schueco International KG
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 DE10237505A external-priority patent/DE10237505A1/de
Application filed by Schueco International KG filed Critical Schueco International KG
Publication of EP1308223A2 publication Critical patent/EP1308223A2/fr
Publication of EP1308223A3 publication Critical patent/EP1308223A3/fr
Application granted granted Critical
Publication of EP1308223B1 publication Critical patent/EP1308223B1/fr
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
    • 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 simulating the bending of a bending body, in particular a profile with a three-roll bending process in which the bending body at least once or several times an arrangement of three in the conveying direction successively arranged rollers is guided, of which the two outer rollers on one side of the bending body and the other roller on the opposite side of the bending body are arranged, the rollers rest on the surface of the bending body and the middle roller by one Distance Z is fed in the direction of the bending body, so that on the bending body a moment M acts, the simulation method as a computer program is designed to calculate parameters of the bending body according to serves the passage of the bending body through the roller assembly.
  • Bent aluminum extrusions are of great importance for lightweight structures of vehicle construction, profile system technology as well as the construction and furniture industry. As a flexible forming process, 3-roll profile bending is good for small batch sizes can be used.
  • Each profile geometry requires radial because of the process inherent in bending and transverse shape changes the planning of your own rolling strategy, so for example a definition of the roller geometry, possibly an implementation of support media in hollow profiles and a definition of the machine control data.
  • a second planning step based on an analytical approach takes into account springback, friction-transferable performance and Roller distance, the roller advance z and the number of roller passes n firmly.
  • the hybrid method from FEM and analytical process simulation allowed the tool-specific prediction of the cross-sectional deformations, the Springback of cross section and bending radius as well as the stress condition.
  • the Roll position and the number of roll passes to achieve the bending radius established.
  • the basic idea is to differentiate between the incoming and the outgoing bar.
  • the incoming beam is deformed while on the outgoing one Beam no longer acts a deformation force, this beam relaxes, i.e., it springs back somewhat against the direction of deformation.
  • Bending lines are calculated iteratively as an initial value problem and with continuum conditions aligned at the cross point of the two bars.
  • a finite element analysis for example, in which a shear force-free analysis is suitable, is suitable for this purpose Bending process is calculated.
  • the incoming bending beam is expedient during the first pass through the roller arrangement described as a straight line and the outgoing bending beam as a circular arc.
  • the incoming and / or the outgoing Bending beam described as a circular arc.
  • Fig. 1 illustrates a 3-roll profile bending with here three cylindrical rolls of the same diameter 1, 2, 3.
  • Two of the rollers 1, 3 are arranged such that their axes lie in a plane parallel to the profile.
  • the middle roller 2 is on the other hand, arranged on the side of the profile opposite the rollers 1 and 3.
  • steps 1a-c The sequence of steps 1a-c is referred to below as a "delivery step”.
  • the specified profile radius must also be observed.
  • the infeed data n number of roll passes
  • Z infeed path of the roll in the direction of the bending body during the nth rolling process
  • FIG. 3 illustrates an example of a cross-section-specific one determined in this way Torque curvature law for that indicated in cross section in Fig. 1 or 3 Profile.
  • the selected computing time-optimized model is based on the assumption of shear force-free Bending in which the profile-supporting effect of the rollers through implementation levels and the fixing of knots is depicted.
  • the method allows even with very complex profile geometries and the use of internal support media small number of elements; the computing times are in the range less minutes.
  • the examinations with MS-AutoForge are carried out with elastic-plastic Substance law and the material data for AIMgSi0.5 performed.
  • the friction is implemented in the model using Coulomb's law. Isoparametric 8-node elements with a trilinear approach were used.
  • the simulation result is e.g. Cross-sectional deformations, springback of Cross section and bending radius as well as the stress condition and the forming capacity to disposal.
  • 6 shows the calculated cross-sectional deformations after unloading of the curved profile. As expected, they are transverse to the bending axis Profile grooves are at high risk of deformation. Variant calculations for different Bending radii show that the profile has exceeded the tolerance from 550 mm. By Inserting polyoximetylene support strips can deform the endangered Cross-sectional areas are kept within the tolerance.
  • the analysis of the radial Springback allows the geometry and material-specific determination precorrected radius data, which are used as target values for the control data generation of the Serve machine.
  • Fig. 8 shows the geometric situation for the first roll pass, in which the incoming profile is described by a straight line and the outgoing profile by a circular arc.
  • incoming and outgoing profile areas are each described by circular equations, which is confirmed by experimental investigations and comparative, shear-loaded FEM analyzes.
  • the result of the calculation given the target radius and any number n of roll passes are the infeeds z n and the resulting bending radii R n .
  • the elastic springback of the bending profile is recorded by the described FEM-assisted pre-correction of the bending radii.
  • the criterion for the smallest possible number of passes is the transferability of the calculated forming performance through friction.
  • the finite difference model used describes the Bending process of the 2-beam model based on the assumption of a beam reduction Lines and assuming a section-wise row bend. This is simple Way the determination of the bending lines for certain load conditions and boundary conditions possible.
  • the model limits are the contact points of the outer rollers.
  • the model limits are the contact points of the outer rollers.
  • the iteration process preferably proceeds as follows (FIG. 9):
  • the roll diameter and center points (infeed) and the pre-bending radius are defined and an initial contact angle ⁇ 1 is specified.
  • Procedures 1-3 are carried out automatically for different deliveries and result in the form of a characteristic curve of the outlet curvature as Function of delivery.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20020024630 2001-11-05 2002-11-04 Procédé de simulation de cintrage de profilés à trois rouleaux Expired - Lifetime EP1308223B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE10153828 2001-11-05
DE10153828 2001-11-05
DE10203437 2002-01-28
DE10203437 2002-01-28
DE10237505 2002-08-16
DE10237505A DE10237505A1 (de) 2001-11-05 2002-08-16 Verfahren zur Simulation eines 3-Walzen-Profilbiegens

Publications (3)

Publication Number Publication Date
EP1308223A2 true EP1308223A2 (fr) 2003-05-07
EP1308223A3 EP1308223A3 (fr) 2004-09-22
EP1308223B1 EP1308223B1 (fr) 2010-04-21

Family

ID=27214648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020024630 Expired - Lifetime EP1308223B1 (fr) 2001-11-05 2002-11-04 Procédé de simulation de cintrage de profilés à trois rouleaux

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EP (1) EP1308223B1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101985131A (zh) * 2010-11-26 2011-03-16 中冶南方工程技术有限公司 带尾折弯机
CN103990665A (zh) * 2013-02-20 2014-08-20 上海宝冶集团有限公司 弧形圆管构件压弯成形过程中精度控制方法
DE102017122073A1 (de) * 2017-09-22 2019-03-28 Haeusler Ag Duggingen Verfahren und Steuerung einer Biegemaschine
DE102018126336A1 (de) * 2018-10-23 2020-04-23 Häusler Holding Ag Biegemaschine und Verfahren zur Steuerung der Biegemaschine
CN111310099A (zh) * 2019-12-31 2020-06-19 中冶南方工程技术有限公司 一种板带轧机辊系弹性变形的计算方法
CN110525584B (zh) * 2019-09-09 2021-05-25 江苏省镇江船厂（集团）有限公司 全回转拖船舷侧内双面曲线线型面板的成型方法
CN113779840A (zh) * 2021-09-14 2021-12-10 内蒙古工业大学 一种确定蛇形轧制板轧制工艺参数的方法
CN114429065A (zh) * 2022-01-07 2022-05-03 西北工业大学 基于有限元的微铣削过程后刀面接触材料回弹标定方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352136A (en) * 1965-03-22 1967-11-14 Conrac Corp Metal forming machine
DE2551944A1 (de) * 1974-11-20 1976-05-26 Boeing Co Numerisch gesteuerte formgebungsmaschine
GB2021455A (en) * 1978-05-12 1979-12-05 Schiffbau Veb K Process and device for controlling bending machines
WO1991013706A1 (fr) * 1990-03-07 1991-09-19 Johannes Tokola Procede d'incurvation de tuyaux
EP0899033A2 (fr) * 1997-08-29 1999-03-03 C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. Machine universelle pour plier des tubes ou barres profilés en courbures fixes ou variables
EP1087278A2 (fr) * 1999-09-24 2001-03-28 Honda Giken Kogyo Kabushiki Kaisha Procédé et dispositif de génération de données de commande pour appareils de flexion et de torsion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352136A (en) * 1965-03-22 1967-11-14 Conrac Corp Metal forming machine
DE2551944A1 (de) * 1974-11-20 1976-05-26 Boeing Co Numerisch gesteuerte formgebungsmaschine
GB2021455A (en) * 1978-05-12 1979-12-05 Schiffbau Veb K Process and device for controlling bending machines
WO1991013706A1 (fr) * 1990-03-07 1991-09-19 Johannes Tokola Procede d'incurvation de tuyaux
EP0899033A2 (fr) * 1997-08-29 1999-03-03 C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. Machine universelle pour plier des tubes ou barres profilés en courbures fixes ou variables
EP1087278A2 (fr) * 1999-09-24 2001-03-28 Honda Giken Kogyo Kabushiki Kaisha Procédé et dispositif de génération de données de commande pour appareils de flexion et de torsion

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101985131A (zh) * 2010-11-26 2011-03-16 中冶南方工程技术有限公司 带尾折弯机
CN103990665A (zh) * 2013-02-20 2014-08-20 上海宝冶集团有限公司 弧形圆管构件压弯成形过程中精度控制方法
CN103990665B (zh) * 2013-02-20 2016-09-28 上海宝冶集团有限公司 弧形圆管构件压弯成形过程中精度控制方法
DE102017122073A1 (de) * 2017-09-22 2019-03-28 Haeusler Ag Duggingen Verfahren und Steuerung einer Biegemaschine
DE102017122073B4 (de) 2017-09-22 2023-05-25 Häusler Holding Ag Verfahren und Steuerung einer Biegemaschine
EP3643418B1 (fr) * 2018-10-23 2022-07-13 Häusler Holding AG Machine à plier et son procédé de commande
DE102018126336A1 (de) * 2018-10-23 2020-04-23 Häusler Holding Ag Biegemaschine und Verfahren zur Steuerung der Biegemaschine
DE102018126336B4 (de) 2018-10-23 2021-09-16 Häusler Holding Ag Verfahren zur Steuerung einer Biegemaschine, Steuerung zum Ansteuern einer Biegemaschine und Biegemaschine
US11565297B2 (en) 2018-10-23 2023-01-31 Häusler Holding Ag Bending machine and method for controlling the bending machine
CN110525584B (zh) * 2019-09-09 2021-05-25 江苏省镇江船厂（集团）有限公司 全回转拖船舷侧内双面曲线线型面板的成型方法
CN111310099A (zh) * 2019-12-31 2020-06-19 中冶南方工程技术有限公司 一种板带轧机辊系弹性变形的计算方法
CN111310099B (zh) * 2019-12-31 2023-11-07 中冶南方工程技术有限公司 一种板带轧机辊系弹性变形的计算方法
CN113779840A (zh) * 2021-09-14 2021-12-10 内蒙古工业大学 一种确定蛇形轧制板轧制工艺参数的方法
CN114429065A (zh) * 2022-01-07 2022-05-03 西北工业大学 基于有限元的微铣削过程后刀面接触材料回弹标定方法
CN114429065B (zh) * 2022-01-07 2024-02-23 西北工业大学 基于有限元的微铣削过程后刀面接触材料回弹标定方法

Also Published As

Publication number Publication date
EP1308223B1 (fr) 2010-04-21
EP1308223A3 (fr) 2004-09-22

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