EP0029345B1 - Procédé et dispositif pour le cintrage arrondi de tôle d'un article essentiellement cylindrique - Google Patents

Procédé et dispositif pour le cintrage arrondi de tôle d'un article essentiellement cylindrique Download PDF

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Publication number
EP0029345B1
EP0029345B1 EP80304061A EP80304061A EP0029345B1 EP 0029345 B1 EP0029345 B1 EP 0029345B1 EP 80304061 A EP80304061 A EP 80304061A EP 80304061 A EP80304061 A EP 80304061A EP 0029345 B1 EP0029345 B1 EP 0029345B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
plate
rollers
gripper
substantially cylindrical
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
EP80304061A
Other languages
German (de)
English (en)
Other versions
EP0029345A2 (fr
EP0029345A3 (en
Inventor
Kenneth Michael Hume
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT80304061T priority Critical patent/ATE7274T1/de
Publication of EP0029345A2 publication Critical patent/EP0029345A2/fr
Publication of EP0029345A3 publication Critical patent/EP0029345A3/en
Application granted granted Critical
Publication of EP0029345B1 publication Critical patent/EP0029345B1/fr
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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B21D5/143—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers making use of a mandrel

Definitions

  • the present invention relates to a method of rolling plate to form a substantially cylindrical article, comprising gripping a leading edge of a length of plate with gripper means on a mandrel so that the plate extends tangentially to the mandrel from said edge, rotating the mandrel whilst engaging the remainder of the plate against the mandrel by means of a pair of pressure rollers in order to move the plate and to curve a forward part of the plate about the mandrel into a semi-cylindrical shape, subsequently further advancing the plate until the rearward part of the plate and its trailing edge pass beyond contact with the mandrel, and then gripping the said trailing edge with the gripper means on the mandrel and rotating the mandrel in the opposite sense to curve the rearward part of the plate about the mandrel into a semi-cylindrical shape so that said forward and rearward parts together complete the formation of the substantially cylindrical article.
  • the invention also relates to an apparatus for carrying out such a method.
  • a similar device is also described in DE-A-21 33 016.
  • a pipe is formed from a plate in one continuous rotation of the mandrel.
  • Rollers are positioned on diametrically opposite sides of the mandrel and these are adapted to be movable relative to the mandrel to enable the gripper means which holds the edge of the plate to pass underneath them.
  • rollers may also be an integral part of the apparatus as described for example in US-A-3,879,994.
  • the horizontal force component may or may not include frictional forces brought about for example by contact between the internal surface of the plate and said mandrel.
  • the invention also provides apparatus for carrying out the method as defined above, comprising supporting feed means, a bending mandrel rotatably arranged thereabove, a gripper means on the bending mandrel, and means for retaining the plate on the mandrel in a stable position, characterised in that in order to prevent lateral shift and damage to the surfaces of the plate being bent when it is being retained, said retaining means comprises two rollers disposed below the mandrel on either side of the centre thereof and means for moving said rollers and said mandrel relative to one another in a direction substantially perpendicular to the surface of the plate.
  • plate rolling apparatus comprising a horizontal framework 11 embodying supporting rollers 12 or other like means upon which steel or other plate 13 may be advanced horizontally at a convenient height.
  • the framework 11 has a well 14 through which a massive supporting I-beam 15 extends in a direction at right-angles to the direction of advancement of the plate 13 with its flanges horizontal.
  • the upper flange 16 supports two horizontal rollers 17 and 18 the axes of which extend in the longitudinal direction of the I-beam 15 at an appropriate height for the upper surface of the rollers 17 and 18 to be at the same height as the upper surfaces of the rollers 12.
  • flat plate advanced along the rollers 12 also contacts and runs upon the rollers 17 and 18.
  • rollers 17 and 18 are sufficiently great to engage the full width of the plate 13.
  • the rollers 17 and 18 are shown supported by end brackets 19 fixed on the flange 1 6 and it is to be understood that as many intermediate supporting brackets may be provided along the rollers 17 and 18 as are deemed necessary to prevent significant flexing.
  • the flange 16 is provided with means for supporting a mandrel 20 with its axis above the web of the I-beam 15 centrally spaced between the rollers 17 and 18 but above them.
  • the supporting means comprises two hydraulic cylinders 21 and 22.
  • One cylinder 21 is fixed in position with a shaft bearing 23 mounted on the upper end of its piston rod 24.
  • the other cylinder 22 also has a piston rod 25 with a shaft bearing 26 mounted on its end, but instead of being fixed to the flange 16 it is connected by a pivot pin 27 to a bracket 28 fixed on the flange 16.
  • the cylinder 22 is pivotally connected to the piston rod 29 of a further hydraulic cylinder 30 pivoted to the web of the I-beam 15 so that by retraction of the piston rod 29 into the cylinder 30 the cylinder 22 together with its piston rod 25 and bearing 26 can be swung downwardly from the full line position shown in Figure 2 into the position shown in dotted lines in which it is entirely below the path of movement of the plate 13.
  • cylinder 22 With the cylinder 22 in its erect position shown in full lines in Figure 2, its bearing 26 and the bearing 23 provide support for the shaft 31 of the mandrel. Mandrels of different diameters can be used with appropriate raising or lowering of the piston rods 24 and 25.
  • Suitable drive means is provided for the shaft 31 comprising a motor 32 and reduction and reversing gear box 33, both mounted on the I-beam 15 with a double universal drive connection 34 extending from the gear box 33 to the shaft 31.
  • the mandrel 20 may be in the form of a cylindrical drum as shown in Figures 1 and 2, in which case for the sake of rigidity it is desirably provided with internal discs or other suitable supporting means, not shown. However, it is not essential for the mandrel to have an enclosing peripheral surface which is a complete cylinder.
  • the power cylinders 21 and 22 are actuatable to move the mandrel up or down during an actual plate bending operation. This will be described in greater detail later.
  • a gripper 36 which consists of a continuous rib extending in an axial direction at the peripheral region of the mandrel.
  • the gripper 36 projects radially away from the mandrel for a short distance and has two flanges 37 which extend in the circumferential direction, one at each side.
  • the flanges 37 provide between themselves and the periphery or the partial peripheral surface of the mandrel a recess which is slightly greater in width than the thickness of the plate with which the mandrel is to be used.
  • FIG. 1 The gripper 36 on mandrel 20 applies a moment to the edge of the plate 13 when the mandrel is rotated in the direction of the arrow in Figure 1, equal to the plastic moment of the plate and a vertical force equal for most of the time to the roller force applied against the plate by rollers 17, 18.
  • Figures 3 to 5 show schematically the various stages of completion of formation of a pipe using the apparatus described in Figures 1 to 2.
  • the torque applied to the mandrel which is constant for practically the full forming cycle, and equal to the plastic moment (MPC) of the plate 13, is in fact applied to the plate edge via the gripper 36.
  • the mandrel 20 acts as guide and there is contact but little pressure between the mandrel 20 and the plate 13. Whilst the plate is in contact with the mandrel there exists all around the plate a bending moment equal to the plastic moment (MPC).
  • the preventative means are basically those which will apply a horizontal retarding force or component of force to the plate in addition to the roller force Fr which acts vertically until the closing stage.
  • the opposing moments are generated by lowering the mandrel by operation of power dylinders 21, 22 in the direction of arrow B or raising the rollers (by means not shown) until both rollers are engaged by the plate thereby creating lateral forces Fr, and Fr 2 .
  • the action of the forces creates a horizontal component of force HFr, and HFr 2' which give rise to these opposing moments.

Landscapes

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

Claims (3)

1. Procédé de cintrage d'une tôle, destiné à former un article sensiblement cylindrique, comprenant le serrage d'un bord antérieur d'un tronçon de tôle (13) aved un dispositif de serrage (36) placé sur un mandrin (20) de manière que la tôle (13) soit disposée tangentiellement au mandrin (20) à partir dudit bord, la rotation du mandrin (20) avec coopération du reste de la tôle (13) contre le mandrin (20) à l'aide d'une paire de rouleaux presseurs (17, 18) afin que la tôle (13) soit déplacée et qu'une partie avant de la tôle (13) soit courbée autour du mandrin (20) et prenne une forme sem-cylindrique, puis l'avance plus importante de la tôle (13) jusqu'à ce que sa partie arrière et son bord postérieur perdent le contact avec le mandrin (20), puis le serrage du bord postérieur par le dispositif de serrage (36) disposé sur le mandrin (20) et l'entraînement en rotation du mandrin (20) en sens opposé afin que la partie arrière de la tôle (13) soit courbée autour du mandrin (20) à une forme semi-cylindrique, si bien que les parties avant et arrière forment ensemble un article sensiblement cylindrique, caractérisé par le déplacement du mandrin (20) par rapport aux deux cylindres presseurs (17, 18) afin qu'une force supplémentaire de compression (Fr,, Fr2) soit appliquée à la tôle (13) au moins pendant les opérations finales du cintrage et que le déplacement latéral de la tôle (13) et du mandrin (20) soit évité, ce déplacement latéral s'effectuant en direction générale radiale par rapport au mandrin (20).
2. Appareil destiné à la mise en oeuvre du procédé selon la revendication 1, comprenant un dispositif (12) d'avance et de support, un mandrin (20) de cintrage disposé au-dessus du dispositif d'avance afin qu'il puisse tourner, un dispositif de serrage (36) placé sur le mandrin de cintrage (20), et un dispositif de retenue de la tôle (13) sur le mandrin (20) en position stable, caractérisé en ce que le dispositif de retenue comporte deux cylindres (17, 18) placés au-dessous du mandrin (20) de part et d'autre du centre de celui-ci, et un dispositif destiné à déplacer les cylindres (17, 18) et le mandrin (20) les uns par rapport aux autres en direction sensiblement perpendiculaire à la surface de la tôle (13) afin que le déplacement latéral et la détérioration de la surface de la tôle (13) en cours de cintrage pendant sa tetenue soient évités.
3. Appareil selon la revendication 2, caractérisé en ce qu'un dispositif est destiné à déplacer le mandrin (20) vers les cylindres (17, 18).
EP80304061A 1979-11-15 1980-11-13 Procédé et dispositif pour le cintrage arrondi de tôle d'un article essentiellement cylindrique Expired EP0029345B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80304061T ATE7274T1 (de) 1979-11-15 1980-11-13 Verfahren und apparat zum walzen von blech zum herstellen eines im wesentlichen zylindrischen gegenstandes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPE134279 1979-11-15
AU1342/79 1979-11-15

Publications (3)

Publication Number Publication Date
EP0029345A2 EP0029345A2 (fr) 1981-05-27
EP0029345A3 EP0029345A3 (en) 1981-11-04
EP0029345B1 true EP0029345B1 (fr) 1984-05-02

Family

ID=3768336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80304061A Expired EP0029345B1 (fr) 1979-11-15 1980-11-13 Procédé et dispositif pour le cintrage arrondi de tôle d'un article essentiellement cylindrique

Country Status (9)

Country Link
EP (1) EP0029345B1 (fr)
JP (1) JPS56111524A (fr)
AR (1) AR225199A1 (fr)
AT (1) ATE7274T1 (fr)
BR (1) BR8007426A (fr)
CA (1) CA1138761A (fr)
NZ (1) NZ195554A (fr)
PH (1) PH23274A (fr)
ZA (1) ZA807076B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5781924A (en) * 1980-09-19 1982-05-22 Maikeru Hiyuumu Kenesu Method and apparatus for bending plate
US4606208A (en) * 1984-05-16 1986-08-19 Kaiser Steel Corporation Pipe forming apparatus
SG54178A1 (en) * 1993-04-05 1998-11-16 Kenneth Michael Hume Pipe forming machine
IT1394571B1 (it) * 2009-07-02 2012-07-05 Zambolin Procedimento di realizzazione di moduli di canalizzazione per impianti di distribuzione di aria e condotto ottenuto mediante tale procedimento
ITMI20111384A1 (it) * 2011-07-25 2013-01-26 Marco Zambolin Procedimento di realizzazione di moduli di canalizzazione per impianti di distribuzione di aria e condotto ottenuto mediante tale procedimento
ITMI20111382A1 (it) * 2011-07-25 2013-01-26 Marco Zambolin Procedimento di realizzazione di moduli di canalizzazione per impianti di distribuzione di aria e condotto ottenuto mediante tale procedimento
ITMI20111380A1 (it) * 2011-07-25 2013-01-26 Marco Zambolin Procedimento di realizzazione di moduli di canalizzazione per impianti di distribuzione di aria e condotto ottenuto mediante tale procedimento
CN104690431B (zh) * 2015-01-22 2018-09-25 安徽腾拓新材料科技有限公司 一种带有激光切割装置的太阳能热水器加工设备
CN105013890A (zh) * 2015-07-29 2015-11-04 成都市松川金属材料有限公司 一种方便送料的卷圆机
TWI610778B (zh) * 2016-10-27 2018-01-11 宜營機械有限公司 板材輾壓機
CN111318596A (zh) * 2020-03-25 2020-06-23 江门市腾宏金属制品有限公司 一种不锈钢管制管机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7122636U (de) * 1972-12-21 Mori Masuri Stahlblechbiegevorrichtung
DE618901C (de) * 1933-12-23 1935-09-20 Wilhelm Heinen Vorrichtung zum Biegen von Blechstreifen o. dgl., insbesondere zu mehr oder weniger g eschlossenen Roehren
GB1099191A (en) * 1963-12-19 1968-01-17 Scottish Machine Tool Corp Ltd Improvements in or relating to plate bending machines
FR1553901A (fr) * 1967-11-29 1969-01-17
DE1752666C3 (de) * 1968-06-29 1975-09-25 Wilhelmsburger Maschinenfabrik, Hinrichs & Sohn, 2054 Geesthacht Blechplattenbiegemaschine
FR2097182A7 (en) * 1970-07-04 1972-03-03 Ferranti Albino Sheet metal cylinders - bending of long lengths
US3738149A (en) * 1971-10-01 1973-06-12 B Archer Pipe forming apparatus and method
US3879994A (en) * 1973-08-16 1975-04-29 Kenneth Michael Hume Plate rolling

Also Published As

Publication number Publication date
EP0029345A2 (fr) 1981-05-27
JPS6321570B2 (fr) 1988-05-07
EP0029345A3 (en) 1981-11-04
NZ195554A (en) 1984-10-19
ATE7274T1 (de) 1984-05-15
PH23274A (en) 1989-06-23
JPS56111524A (en) 1981-09-03
ZA807076B (en) 1981-11-25
CA1138761A (fr) 1983-01-04
AR225199A1 (es) 1982-02-26
BR8007426A (pt) 1981-05-26

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