EP0334353A1 - Procédé et machine pour plier de préférence du matériel en forme de barre - Google Patents

Procédé et machine pour plier de préférence du matériel en forme de barre Download PDF

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Publication number
EP0334353A1
EP0334353A1 EP89105241A EP89105241A EP0334353A1 EP 0334353 A1 EP0334353 A1 EP 0334353A1 EP 89105241 A EP89105241 A EP 89105241A EP 89105241 A EP89105241 A EP 89105241A EP 0334353 A1 EP0334353 A1 EP 0334353A1
Authority
EP
European Patent Office
Prior art keywords
bending
angle
rod
bent
shaped material
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Withdrawn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
EP89105241A
Other languages
German (de)
English (en)
Inventor
Entwicklungs- U. Verwertungs- Gesellschaft M.B.H. Evg
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.)
EVG Entwicklungs und Verwertungs GmbH
Original Assignee
EVG Entwicklungs und Verwertungs GmbH
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 EVG Entwicklungs und Verwertungs GmbH filed Critical EVG Entwicklungs und Verwertungs GmbH
Publication of EP0334353A1 publication Critical patent/EP0334353A1/fr
Withdrawn legal-status Critical Current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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • 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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the invention relates to a method for bending a longitudinal section B of a preferably rod-shaped material, in particular essentially on an arc of a circle with the radius R by an angle Z.
  • the invention also relates to a device for bending a longitudinal section B of a preferably rod-shaped material Material essentially on an arc of a circle with the radius R through an angle Z comprising a holding device for the material, a bending surface and an axially aligning counter bearing arranged between the latter and the holding device, and a bending element.
  • a method or a device of the type described above can be found in EP-B 0 121 896.
  • Two bending carriages comprising a bending mandrel and a bending crank are used, by means of which the rod-shaped material is optionally held or bent.
  • the material does not move within the device itself. Rather, the bending slides are moved in the axial direction of the material to the points at which a bending is to be carried out.
  • different ones are required To use bending templates. As a result, with changing rod material diameters or bends of different geometries to be produced, neither a high throughput can be achieved nor an automatically running bending process take place.
  • the object of the present invention is to develop a method and a device of the type mentioned at the outset such that an essentially fully automatic bending process is made possible irrespective of the bar material diameters to be bent or the desired bending geometries, in particular an exchange of bending templates and / or the use of Bending forms on the outer surface of which the material is bent is not required. A high dimensional accuracy of the curved lengths should also be guaranteed.
  • the object is achieved by a method which is essentially characterized in that abutting, the longitudinal section B forming sections A are successively bent by an actual bending angle U / T, which is the sum of the predetermined bending angle Z / T and one by the Elasticity of the rod-shaped material and / or a mechanical inertia of a device causing the bending force corresponds to a certain return angle RW.
  • the invention is characterized in that, in T bending cycles, sections A corresponding to the length B / T are bent one after the other by an actual bending angle (partial angle) U / T, whereby the permanent desired bending angle Z / T is ensured after completion of the bending .
  • any desired bending radius R and every angle (total bending angle) Z can be bent without the need to use different templates and / or bending shapes depending on the bar material diameter or the bending radius.
  • the number of cycles and / or the drawer length that is the distance by which the material of partial or The cycle bending process is to be shifted to the partial or cycle bending process, and / or the bending force (torque) to be acted on the rod material is controlled in terms of sequence.
  • the relations to be considered are as follows:
  • the actual bending angle takes into account both the elasticity of the material (restoring forces) and the mechanical inertia of the bending device.
  • Mechanical inertia takes into account the fact that even after a stop signal has been triggered, the bending element causing the bend continues to run, so that the bending process is consequently not suddenly interrupted. This "wake" bend must also be taken into account to determine the actual bend angle so that the remaining bend angle corresponds to the target bend angle.
  • the diameter of the material When determining the bending angle, the diameter of the material must of course also be taken into account (determination of the neutral phase). According to the invention, the diameter of the material is determined by determining the displacement path of the bending element from a zero line, which corresponds to the central axis of the material to be bent, to the outer surface of the material on which the bending element rests.
  • the teaching according to the invention does not require that different bending mandrels and / or bending elements and / or bending templates have to be used for different rod materials and bending geometries. Rather, the effective bending surface and the bending element such as e.g. Bending crank or bending stone are used unchanged, so that there is consequently a material-independent bending.
  • the restoring angle is determined according to the invention in that after the first bending operation the difference between the actual and target partial bending angle is determined by preferably the change in position of the bending element (eg stroke difference) so that the resulting difference in the further bending cycles to the target partial bending angle can be added automatically.
  • the change in position of the bending element eg stroke difference
  • a device for bending preferably rod-shaped material is characterized in that the length section B can be bent by bending successive sections A, which can be subjected to the bending force by successive displacement of the material relative to the bending element, preferably by means of the holding device, this being to act on the length section with an adjustable bending force, the bending element is either pivotable about a pivot point that is not identical to the center of the arc or is designed to be linearly displaceable.
  • the required bending force can then be introduced particularly cheaply, when the fulcrum of the bending crank lies on the side of the rod-shaped material opposite the center of the circle.
  • the bending element can be designed as a bending stone, which performs a purely translational movement, preferably perpendicular to the tangent at the point of contact with the material, during bending.
  • the device is also characterized in that the holding device has the rod-shaped material holding clamping jaws and the material corresponding to the number T of the partial bends to be carried out in batches in the direction of the bending element by a distance A, which is the quotient of the length section B and the number T. corresponds.
  • the movement can also take place in the opposite direction.
  • the effective bending surface has a radius which is smaller than the smallest radius of the length section B / T to be bent.
  • teaching according to the invention can also be characterized as follows.
  • a method for bending a section of a preferably rod-shaped material to a desired desired sheet is proposed, which is characterized in that the deformation is carried out in a closed control loop in such a way that, in addition to an actual bending, at least one determined by the elasticity of the material in order to achieve the desired sheet Manipulated variable is taken into account.
  • FIG. 1 shows a basic illustration of a device and a method to be carried out with it, in order to bend a rod-shaped material (13) over a length section B by a bending radius R, based on the neutral phase, and an angle Z.
  • the rod-shaped material (13) such as reinforcing steel
  • a holding device designated as a pressing unit (9) by means of holding jaws (10) and axially between a bending surface such as a bending mandrel (12) and a counter-bearing (11), for example, hydraulically adjustable for adjustment to different rod material diameters. guided.
  • the bending mandrel (12) lies between the rod-shaped material (13) and the center of the circle with the radius R.
  • a bending crank having a bending element in the form of a bending roller (19).
  • the bending roller (19) can be rotated about an axis determined by a hinge pin (20).
  • the bending roller (19) in turn can be pivoted about an axis in order to exert a bending force on the rod-shaped material.
  • the bending roller (19) with the axis (14) is part of a so-called bending rocker (17), which is connected via a pivot point (16) to a bending drive N in order to produce a force in the direction of arrow E during the bending process and during displacement of the rod-shaped material (13) to be withdrawn in the direction of arrow F.
  • the force is applied or withdrawn depending on whether the holding device (9) is subjected to a linear actuator M. and thus is movable in the direction of arrow G or not.
  • This link is indicated in the drawing by reference numerals (15) and (18).
  • this is arranged on a base plate (8) and comprises at least two legs describing an angle, one of which is the connection between the axis (14) and the hinge pin (20) and the other is formed by the connection between the axis (14) and the articulation point (16).
  • the rod-shaped material (13) is inserted between the open jaws (10) of the holding device (9) and between the counter bearing (11) and the bending mandrel (12).
  • the rod-shaped material (13) is then fixed in the direction of arrow J between the pressure jaws (10) of the holding device (9) by a contact pressure K. This fixation takes place during the entire bending process.
  • the rod-shaped material is bent by a partial bending angle X, which can also be referred to as the stroke angle.
  • a partial bending angle X which can also be referred to as the stroke angle.
  • the partial bending angle X should correspond to the permanent, i.e. the target bending angle, even if the actual bending angle (U / T) is larger when bending, in order to take into account the elastic restoring forces of the bent material and the mechanical inertia of the bending rocker (17).
  • the bending rocker (17) and thus the bending roller (19) are moved back by the angle Y by means of the bending drive N in the direction of the arrow F.
  • the first bending cycle has ended.
  • the holding device (9) in the direction of arrow G by means of Thrust actuator M shifted by a length (stroke length) A.
  • the bending rocker (17) and thus the bending roller (19) is pivoted in the direction of the arrow in order to apply a bending force L.
  • Another bending angle X is bent, which runs between the beams (2) and (3).
  • the rod material of different diameters is produced in order to bend desired angles Z or radii R without bending templates or bending shapes (corresponding to the radius 0- shown in the figure) or a change in the bending rocker (17). with bending roller (19) and pivot point (1) is required.
  • the bending rocker with bending roller can be replaced by a bending stone which can be displaced along the dashed line, that is to say along the arrow (21), so as to make the partial bends to the desired extent by interacting with the rod-shaped material (13).
  • the adjustment path is between a predetermined by the device and with the central axis (22) of the material (13) coincident zero line to the actual point of contact of the bending stone with the non-bent material is detected.
  • the return angle required to calculate the actual bending angle is also determined by the fact that the bending stone — like the bending roller, moreover — remains in constant contact with the rod-shaped material before and after a bending cycle, so that from the different positions, the elasticity immediately results of the material and the mechanical inertia of the device predetermined return angle can be determined.
  • the effective bending surface of the mandrel (12) must have a radius that is smaller than the smallest radius of the bent material in order to be able to bend any materials to the desired extent without an exchange of the mandrel (12) or the bending stone or the bending roller is required.
  • the rod-shaped material (13) is bent by means of a bending element in the form of a bending stone (19) which is arranged to be displaceable along a straight line.
  • a hydraulic drive for the movement of the bending stone (19) preferably takes place, a coupling with the counter bearing (11) being possible.
  • the counter-bearing (11) and the bending element in the form of the bending stone (19) are moved synchronously onto the rod-shaped material (3) until it bears against it.
  • the material is bent by the angle U: T in order to arrive at the permanent bending angle X, which corresponds to the bending stroke Y.
  • the difference between the actual bending angle U / T and the target bending angle X corresponds to the return angle RW, which is determined by the elasticity of the material (13) and possibly the mechanical inertia of the device applying the bending force.
  • the bending stone (19) is designed to be pivotable about an axis (20) in order to allow a flat support on the material (13).
  • one of the clamping jaws has a profiling in order to ensure that it is not possible for the material to slip when the material is bent.
  • the holding device (9) can be displaced by means of a cylinder M to the bending element (12), this displacement taking place in cycles.
  • the measuring stroke P of the bending stone (19) is used, which is shifted from a zero line, which is in fixed relation to the zero line of the material (13), to the point of contact with the material .
  • This contact surface then has a distance S from the bending surface (12) which corresponds to the diameter of the material. The material diameter then results directly from the difference between the zero position and the adjustment stroke P.
  • the reference symbol Q denotes the adjustment axis of the counter bearing (11), which runs parallel to the direction of movement V of the bending element (19).
  • the center point of the bending radius R lies on the straight line W, which in turn runs perpendicular to the longitudinal axis of the material (13) in order to be able to clearly read the geometric relationships of the angles to be bent from the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP89105241A 1988-03-25 1989-03-23 Procédé et machine pour plier de préférence du matériel en forme de barre Withdrawn EP0334353A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3810277 1988-03-25
DE3810277 1988-03-25
DE3903301 1989-02-04
DE19893903301 DE3903301A1 (de) 1988-03-25 1989-02-04 Verfahren und vorrichtung zum biegen von vorzugsweise stabfoermigem material

Publications (1)

Publication Number Publication Date
EP0334353A1 true EP0334353A1 (fr) 1989-09-27

Family

ID=25866411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105241A Withdrawn EP0334353A1 (fr) 1988-03-25 1989-03-23 Procédé et machine pour plier de préférence du matériel en forme de barre

Country Status (5)

Country Link
EP (1) EP0334353A1 (fr)
AU (1) AU3294189A (fr)
DE (1) DE3903301A1 (fr)
GR (1) GR890300160T1 (fr)
WO (1) WO1989009104A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0502341A1 (fr) * 1991-02-28 1992-09-09 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Ensemble pour plier des faisceaux de barres
EP1199115A1 (fr) * 2000-10-16 2002-04-24 SCHNELL S.r.L. Procédé pour cintrer des barres profilées ou analogues selon des rayons de courbure programmables
WO2006055998A1 (fr) * 2004-11-24 2006-06-01 Universität für Angewandte Kunst Wien Procede d'amorçage de machines a cintrer
CN107971422A (zh) * 2017-11-22 2018-05-01 奥美森智能装备股份有限公司 一种长u弯管机
CN111672950A (zh) * 2019-09-10 2020-09-18 广东职业技术学院 一种应用极坐标法的弯管加工方法及系统
CN114653799A (zh) * 2022-04-29 2022-06-24 沧州隆泰迪管道科技有限公司 一种提高中频弯管机弯管角度精确性的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5243844A (en) * 1990-05-21 1993-09-14 Peter Lisec Process for producing curved sections in hollow profile strips
US5161401A (en) * 1990-05-21 1992-11-10 Peter Lisec Apparatus for producing bent sections in hollow profile strips
AT405912B (de) * 1990-10-02 1999-12-27 Lisec Peter Verfahren und vorrichtung zum krümmen von hohlprofilleisten
AT397055B (de) * 1990-06-07 1994-01-25 Lisec Peter Verfahren und vorrichtung zum biegen von hohlprofilleisten zu abstandhalterrahmen für isolierglasscheiben
DE102013103461B4 (de) * 2013-04-08 2017-03-30 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum Biegen von Rohren

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075568A (en) * 1958-12-19 1963-01-29 Claude D Draucker Machine for precision bending of electrical conduit
US3396565A (en) * 1965-09-30 1968-08-13 L C Miller Co Apparatus for bending metal tubing
GB1144269A (en) * 1966-09-22 1969-03-05 Hilgers Masch & App Bauanstalt Pipe bending machines
US3465560A (en) * 1968-03-06 1969-09-09 Orville N Gardner Tube bending apparatus
DE1950127A1 (de) * 1969-10-04 1971-04-22 Peddinghaus Paul Ferd Fa Betoneisenbiegemaschine mit elektrischer Einstellung der Biegewinkel des Biegetellers oder -armes
FR2115157A1 (fr) * 1970-11-30 1972-07-07 Peddinghaus Paul Ferd
GB1360935A (en) * 1972-09-08 1974-07-24 Mitsubishi Heavy Ind Ltd Method and apparatus for bending a metallic member
EP0121896A2 (fr) * 1983-04-06 1984-10-17 Ruhl, Heinz Procédé pour et dispostif à cintrer des matériaux en forme de barre

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075568A (en) * 1958-12-19 1963-01-29 Claude D Draucker Machine for precision bending of electrical conduit
US3396565A (en) * 1965-09-30 1968-08-13 L C Miller Co Apparatus for bending metal tubing
GB1144269A (en) * 1966-09-22 1969-03-05 Hilgers Masch & App Bauanstalt Pipe bending machines
US3465560A (en) * 1968-03-06 1969-09-09 Orville N Gardner Tube bending apparatus
DE1950127A1 (de) * 1969-10-04 1971-04-22 Peddinghaus Paul Ferd Fa Betoneisenbiegemaschine mit elektrischer Einstellung der Biegewinkel des Biegetellers oder -armes
FR2115157A1 (fr) * 1970-11-30 1972-07-07 Peddinghaus Paul Ferd
GB1360935A (en) * 1972-09-08 1974-07-24 Mitsubishi Heavy Ind Ltd Method and apparatus for bending a metallic member
EP0121896A2 (fr) * 1983-04-06 1984-10-17 Ruhl, Heinz Procédé pour et dispostif à cintrer des matériaux en forme de barre

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0502341A1 (fr) * 1991-02-28 1992-09-09 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Ensemble pour plier des faisceaux de barres
US5199292A (en) * 1991-02-28 1993-04-06 M.E.P. Macchine Elettroniche Piegatrici Spa Assembly to bend bundles of rods
EP1199115A1 (fr) * 2000-10-16 2002-04-24 SCHNELL S.r.L. Procédé pour cintrer des barres profilées ou analogues selon des rayons de courbure programmables
WO2006055998A1 (fr) * 2004-11-24 2006-06-01 Universität für Angewandte Kunst Wien Procede d'amorçage de machines a cintrer
CN107971422A (zh) * 2017-11-22 2018-05-01 奥美森智能装备股份有限公司 一种长u弯管机
CN107971422B (zh) * 2017-11-22 2023-12-01 奥美森智能装备股份有限公司 一种长u弯管机
CN111672950A (zh) * 2019-09-10 2020-09-18 广东职业技术学院 一种应用极坐标法的弯管加工方法及系统
CN111672950B (zh) * 2019-09-10 2021-04-06 广东职业技术学院 一种应用极坐标法的弯管加工方法及系统
CN114653799A (zh) * 2022-04-29 2022-06-24 沧州隆泰迪管道科技有限公司 一种提高中频弯管机弯管角度精确性的方法
CN114653799B (zh) * 2022-04-29 2024-04-05 沧州隆泰迪管道科技有限公司 一种提高中频弯管机弯管角度精确性的方法

Also Published As

Publication number Publication date
AU3294189A (en) 1989-10-16
WO1989009104A1 (fr) 1989-10-05
DE3903301A1 (de) 1989-10-05
GR890300160T1 (en) 1990-05-11

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