EP0240623B1 - Profilbiegen - Google Patents

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Publication number
EP0240623B1
EP0240623B1 EP19860302132 EP86302132A EP0240623B1 EP 0240623 B1 EP0240623 B1 EP 0240623B1 EP 19860302132 EP19860302132 EP 19860302132 EP 86302132 A EP86302132 A EP 86302132A EP 0240623 B1 EP0240623 B1 EP 0240623B1
Authority
EP
European Patent Office
Prior art keywords
roll
pair
flanges
restraining means
threaded
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
Application number
EP19860302132
Other languages
English (en)
French (fr)
Other versions
EP0240623A3 (en
EP0240623A2 (de
Inventor
Colin John Macleod
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.)
Caledonian Mining Co Ltd
Original Assignee
Caledonian Mining Co Ltd
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 to GB08527565A priority Critical patent/GB2166987B/en
Application filed by Caledonian Mining Co Ltd filed Critical Caledonian Mining Co Ltd
Priority to DE19863687125 priority patent/DE3687125T2/de
Priority to EP19860302132 priority patent/EP0240623B1/de
Publication of EP0240623A2 publication Critical patent/EP0240623A2/de
Publication of EP0240623A3 publication Critical patent/EP0240623A3/en
Application granted granted Critical
Publication of EP0240623B1 publication Critical patent/EP0240623B1/de
Expired 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 present invention relates to apparatus for and a method of bending metal profiles such as 'I' section beams and 'U' section beams or other formed sections.
  • the first roll normally has a fixed axis on one side of the path, the next or second along the path is on the other side, whilst the third roll is on the same side of the path as the first, the second and third rolls have axes which are adjustable with respect to the bending path. Bending is gradual, that is the position of the second and third rolls is initially only slightly away from the straight feed line of the material. In order to progress the bend, the material is passed through the rolls several times. Each time the positions of the second and third rolls are adjusted to increase the bend. As the bend increases the tendency for the material to twist increases.
  • the rolls are provided with flanges which should be in contact with the material on both edges.
  • the flanges are normally adjustable to provide for different material widths.
  • the material expands on the inside of the curvature and contracts on the outside so that to maintain contact on both edges the flanges have to be reset. This is manually done by tightening a nut on the roll shaft.
  • the necessity for repassing the material with manual readjustment of the flanges after each pass is time-consuming and is very much an ad hoc procedure which relies considerably on the operator's skill to achieve an accurately formed finished article which does not have a twist in it.
  • FR-A-348680 describes a bending machine comprising three rollers, one fixed in position and two movable in an arcuate path.
  • Each roller comprises a round block with a shoulder at one end.
  • a cap is fitted over the other end of the block and biased towards the shoulder by a spring.
  • a screw is provided for adjusting the tension in the spring.
  • the web of a bar to be bent can be nipped between the cap and shoulder to hold it in place. Nip is provided from one side only and no provision is made for continuous adjustment to accommodate shrinkage or swelling of the web.
  • a bending machine for bending metal profiles having for example an "I" section or a “U” section comprises a plurality of rolls arranged to act on a profile along a curvilinear roll path so as to bend the profile, at least a first one of the rolls being provided with a pair of restraining means, each restraining means being located either side of the roll path so that the profile is enclosed at a bending point between the restraining means and a contact surface of said first roll, said restraining means acting on the profile in a direction substantially at right angles to the direction of action of said contact surface of said first roll, means for enabling continuous adjustment of the relative position of the pair of restraining means during rolling and control means for setting the value of the total restraining force provided by the pair of restraining means characterised in that the adjustment means links the pair of restraining means and is arranged to adjust the relative position thereof by automatically moving them in unison towards or away from each other to maintain the total restraining force provided thereby constant
  • a method of bending metal profiles having for example, an "I" section or a “U” section comprises passing a profile along a curvilinear roll path between a plurality of rolls at least one of which is provided with a pair of restraining means acting in a first direction substantially at right angles to a second direction being the direction of bending action of said one roll on said profile and controlling the value of the total restraining force provided by the restraining means, characterised in that the relative position of the pair of restraining means is continuously automatically adjusted by moving them in unison towards or away from each other to maintain the total restraining force provided thereby constant.
  • the restraining means are flanges.
  • the pair of restraining means comprises a pair of flanges on one of the rolls interconnected by one or more counter threaded or cammed shafts, each flange has a threaded or cammed portion counter to the other so that rotation of the or each counter threaded or cammed shaft relative the roll causes the flanges to move in unison towards or away from each other.
  • the flanges should be controlled to move apart from each other as the bend increases whilst a roll on the outside of the bend is provided with similar flanges which are controlled to move towards each other as the bend increases. In such a case it will be appreciated that the roll axes are continuously moved to achieve the bending.
  • FIG. 1 the typical three roll bending machine layout is shown but it should be clear that the invention is in no way restricted to such a layout.
  • the rolls in the direction of movement of the metal profile - in this case an 'I' section beam 4 - are first roll 1 on the outside of the beam path, second roll 2 on the inside of the bend, and third roll 3 on the outside of the bend path.
  • roll 1 has a fixed axis, though it can of course be made to be movable if required.
  • the axes of rolls 2 and 3 are movable relative each other and roll 1 whilst setting up the bend and during the bending operation.
  • CNC computer numerical control device
  • FIG. 3 and 4 the control arrangements for 2 (similar to those for roll 3 and even those for roll 1 if required) are shown.
  • Flanges 14 and 16 made of hardened steel are screwed to plates 22 and 24 respectively.
  • Plate 22 has three (or there may be more) holes 26 axially parallel to the axis of the main roll drive shaft 30. Holes 26 are threaded with a left hand thread.
  • Plate 24 has holes 28 axially aligned with holes 26 and are threaded with a right hand thread.
  • Between plates 22 and 24 is a main roll member 32 having a hardened steel tyre 34 which in use abutts the material to be bent. Member 32 is bolted to an end flange 36 of shaft 30 by bolts 38.
  • a capping plate 40 is bolted to the opposite side of members 32. Between the capping plate 40 and member 32 are located a sun wheel 42 and coacting planet gears 43. Wheel 42 is fixed to a shaft 44 born in suitable bearings in the member 32 and plate 40 and extending through plate 40 and plate 22 to a brake disc 46. Gears 43 have suitable bearings in member 32 and plate 40 and shafts 48 extend therefrom, the shafts 48 terminating in left handed and right handed threaded portions 50 and 52 corresponding to those in holes 26 and 28 respectively. Rotation of shaft 44 relative to shaft 30 causes rotation of wheel 42 and gears 43 causing the rotation of shafts 48 in plates 22 and 24 to close or open flanges 14 and 16 on workpiece 4.
  • the torque can be applied to shaft 44 by an alternative arrangement i.e. a torque motor mounted to plate 22, or a torque motor mounted on a bracket 67 with belt drive or the like to shaft 44.
  • the braking force applicable to disc 46 will be proportioned to the restraining force of flanges 14 and 16 on the workpiece and this can be easily controlled by suitable servo mechanisms controlled in turn by the main control means 55 which may be the main CNC device.
  • a slot 56 is provided in member 32 ( Figure 4) to enable easy cutting away of tyre 34. A new tyre can then be shrunk on.
  • FIG. 5 An alternative arrangement is shown in Figure 5 where the main shaft 30 ⁇ has a rolling flange 36 ⁇ on which is heat shrunk a tyre 34 ⁇ . Threaded portions 58 and 60 with left handed and right handed threads are provided either ride on the main shaft. Screwed on the threaded portions are flange plate 22 ⁇ and 24 ⁇ with flanges 14 ⁇ and 16 ⁇ . Screwing toward or away from each other is controlled by a pair of shoe or band brakes 62 and 64 controlled by a common servo system 66. The operation in similar to the previous embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (8)

  1. Biegemaschine zum Biegen von Metallprofilen, welche beispielsweise ein "I"-Profil oder ein "U"-Profil aufweisen, mit einer Vielzahl von Walzen, die angeordnet sind, um auf ein Profil entlang einer gekrümmten Walzenbahn derart einzuwirken, daß das Profil gebogen wird, daß mindestens eine erste der Walzen mit einem Paar Feststellmitteln versehen ist, wobei jedes Feststellmittel an einer der Seiten der Walzenbahn angeordnet ist, so daß das Profil an einem Biegepunkt zwischen den Feststellmitteln und einer Kontaktoberfläche der ersten Walze umschlossen ist, daß die Feststellmittel auf das Profil in halbwegs rechtwinkeliger Richtung zur Richtung der Arbeitsweise der Kontaktoberfläche der ersten Walze wirken, Mitteln zur Befähigung zur kontinuierlichen Einstellung der relativen Position des Festellmittelpaars während des Walzens und Regulierungsmitteln zum Einstellen des Wertes der gesamten Feststellkraft, die durch das Feststellmittelpaar geliefert wird,
    dadurch gekennzeichnet,
    daß das Einstellmittel (48, 30') das Paar Feststellmittel (14, 16) verbindet und angeordnet ist, um dessen relative Position durch automatisches Bewegen im Gleichgang zueinander hin oder voneinander weg einzustellen, um die dabei gelieferte gesamte Feststellkraft konstant zu halten.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß das Paar Feststellmittel auf der ersten Walze (2) ein Paar Flansche (14, 16) umfaßt, welche durch mindestens eine gegengeschraubte oder -genockte Welle (48) untereinander verbunden sind, daß jeder Flansch (14, 16) einen geschraubten oder genockten Teilbereich (26, 28) aufweist, welcher mit der gegengeschraubten oder genockten Welle (48) verbunden ist, daß der geschraubte oder genockte Teilbereich (26) eines Flansches (14) eines Paars in Bezug auf den geschraubten oder genockten Teilbereich (28) des anderen Flansches (16) des Paars gegengeschraubt oder -genockt ist, so daß die Rotation der Welle (48) relativ zur Walze bewirkt, daß sich das Paar Flansche (14, 16) in Gleichgang zueinander hin oder voneinander weg bewegt.
  3. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß die oder jede gegengeschraubte oder -genockte Welle (48) in Eingriff mit einer Bremswelle (44) steht, die koaxial zu einer fahrbar an der Walze (2) befestigten Antriebswelle (30) liegt, und daß ein Bremsmittel (46, 54) auf der Bremswelle (48) durch das Regulierungsmittel (55) reguliert wird.
  4. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß das Paar Feststellmittel ein Paar Flansche (14', 16') auf der ersten Walze (2) umfaßt, die geschraubt oder genockt an den gegengeschraubten oder -genockten Teilbereichen (58, 60) einer Antriebswelle (30'), welche fahrbar an der erstzen Walze (2) befestigt ist, angeordnet sind, daß sich ein geschraubter oder genockter Teilbereich (58) in entgegengesetzter Richtung zum anderen geschraubten oder genockten Teilbereich (60) befindet, daß Bremsmittel (62, 64) zum Bremsen der Flansche (14', 16') angeordnet sind, um eine veränderliche Bewegung zwischen den Flanschen (14', 16') und der Antriebswelle (30') zu erzeugen, wobei die Rotation der Antriebswelle (30') mit dem Bremsen der Flansche (14', 16') bewirkt, daß sich die Flansche des Paars in Gleichgang zueinander hin oder voneinander weg bewegen.
  5. Maschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie mindestens eine erste (2) und eine zweite (3) Walze aufweist, welche jeweils mit einem Paar Feststellmittel (14, 16 und 18, 20) versehen ist, daß die eine Walze (3) nahe dem Biegepunkt auf der Außenseite der Walzbahn und die andere Walze (2) nahe dem Biegepunkt auf der Innenseite der Walzbahn angeordnet ist, daß die Flanschpaare so geregelt werden, daß sich die Flansche (14, 16) der Walze (2) auf der Innenseite der Biegung voneinander weg bewegen, wenn die Biegung ansteigt, während die Flansche (18, 20) der Walze (3) auf der Außenseite der Biegung geregelt werden, um sich zueinander hin oder voneinander weg zu bewegen, wenn die Biegung ansteigt.
  6. Maschine nach einem der der vorhergehenden Ansprüche, worin Detektoren (5, 6) zur Erfassung des Biegewinkels an jeder Seite der Kontaktoberfläche der Walze (2, 3) vorgesehen sind.
  7. Verfahren zum Biegen von Metallprofilen, die beispielsweise als "I"-Profil oder als "U"-Profil ausgebildet sind, welches umfaßt, daß ein Profil entlang einer gekrümmten Walzbahn zwischen einer Vielzahl von Walzen hindurchgeführt wird, daß mindestens eine der Walzen mit einem Paar Feststellmittel versehen ist, die in einer ersten Richtung , die halbwegs rechtwinkelig zu einer zweiten Richtung ist, die die Richtung des Biegevorganges der Walze auf das Profil ist, wirken und daß der Wert der gesamten Festellkraft, die durch die Feststellmittel geliefert wird, geregelt wird,
    dadurch gekennzeichnet,
    daß die relative Position der Feststellmittelpaare kontinuierlich automatisch eingestellt wird, indem sie in Gleichgang zueinander hin oder voneinander weg bewegt werden, um die dabei gelieferte gesamte Feststellkraft konstant zu halten.
  8. Verfahren zum Biegen von Bandmaterial nach Anspruch 7, welches umfaßt, daß ein Paar der Festellmittel voneinander und vom Profil auf der Innenseite der gekrümmten Walzbahn weg bewegt wird, wenn die Biegung anwächst, während ein Paar der Feststellmittel zueinander hin auf das Profil auf die Außenseite der Walze bewegt wird, wenn die Biegung anwächst.
EP19860302132 1984-11-16 1986-03-21 Profilbiegen Expired EP0240623B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB08527565A GB2166987B (en) 1984-11-16 1985-11-08 Bending roll with lateral work restraining means
DE19863687125 DE3687125T2 (de) 1986-03-21 1986-03-21 Profilbiegen.
EP19860302132 EP0240623B1 (de) 1986-03-21 1986-03-21 Profilbiegen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860302132 EP0240623B1 (de) 1986-03-21 1986-03-21 Profilbiegen

Publications (3)

Publication Number Publication Date
EP0240623A2 EP0240623A2 (de) 1987-10-14
EP0240623A3 EP0240623A3 (en) 1988-11-09
EP0240623B1 true EP0240623B1 (de) 1992-11-11

Family

ID=8195945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860302132 Expired EP0240623B1 (de) 1984-11-16 1986-03-21 Profilbiegen

Country Status (2)

Country Link
EP (1) EP0240623B1 (de)
DE (1) DE3687125T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057456B (zh) * 2015-08-13 2017-12-22 湖北元拓铝合金模架制造有限公司 一种型材卷弯模具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE293462C (de) *
FR348680A (fr) * 1903-12-03 1905-04-21 Nicol Sinclair Arthur Machine à courber et à redresser les barres et poutrelles métalliques
FR456403A (fr) * 1913-03-22 1913-08-26 Wilhelmshuette In Saalfeld A D Saale Aktiengesells Train de rouleaux pour cintrer les fers profilés
US1926830A (en) * 1932-03-25 1933-09-12 Buffalo Forge Co Bending machine roll
GB551447A (en) * 1941-08-20 1943-02-23 Salopian Engineers Ltd Improvements in rolls for bending lengths of metal of angle, tee or other bar section
CH548236A (de) * 1973-02-07 1974-04-30 Kloeckner Werke Ag Verfahren und vorrichtung zur herstellung der kruemmung bei profilen, mit einer profilierung versehenen platten oder baendern aus einem plastisch verformbaren material, mittels walzen.
DE3041212C2 (de) * 1980-11-03 1982-08-26 August Wilhelm 5901 Wilnsdorf Schäfer Vorrichtung zum Biegen, insbesondere Runden von Blechen oder Profilen

Also Published As

Publication number Publication date
DE3687125T2 (de) 1993-04-15
EP0240623A3 (en) 1988-11-09
EP0240623A2 (de) 1987-10-14
DE3687125D1 (de) 1992-12-17

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