EP3771503A1 - Biegevorrichtung - Google Patents

Biegevorrichtung Download PDF

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Publication number
EP3771503A1
EP3771503A1 EP20187723.0A EP20187723A EP3771503A1 EP 3771503 A1 EP3771503 A1 EP 3771503A1 EP 20187723 A EP20187723 A EP 20187723A EP 3771503 A1 EP3771503 A1 EP 3771503A1
Authority
EP
European Patent Office
Prior art keywords
eraser
roller
bending
rotation
plate
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
EP20187723.0A
Other languages
English (en)
French (fr)
Other versions
EP3771503B1 (de
EP3771503C0 (de
Inventor
Jean-Paul Bruyas
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.)
Numalliance SAS
Original Assignee
Numalliance SAS
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 Numalliance SAS filed Critical Numalliance SAS
Publication of EP3771503A1 publication Critical patent/EP3771503A1/de
Application granted granted Critical
Publication of EP3771503B1 publication Critical patent/EP3771503B1/de
Publication of EP3771503C0 publication Critical patent/EP3771503C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
    • 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
    • B21D7/04—Bending rods, profiles, or tubes over a movably-arranged forming menber
    • 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
    • B21D7/085—Bending rods, profiles, or tubes by passing between rollers or through a curved die by passing through a curved die

Definitions

  • the present invention relates to the field of tube bending and in particular to adaptations making it possible to optimize the bending operation.
  • a tube bending machine conventionally comprises a bending roller as well as a crease eraser.
  • the tube placed in the bending machine is wound around the bending roller.
  • This eraser is a fixed wear part which comes as close as possible to the bending roller which turns during the bending of the tube.
  • the positioning of the pleat eraser relative to the bending roller must be very precise in order to operate effectively and above all not to cause the breakage of said pleat eraser which is very fragile.
  • the latter is conventionally made of special materials allowing both the guiding and the sliding of the tube during deformation.
  • the eraser is mounted on an eraser support, usually attached to the bending head.
  • This eraser holder has settings to adjust the position of the eraser relative to the bending roller.
  • a drawback of the bending operation lies in the adjustment of the position of the eraser relative to the roller. Indeed, this adjustment requires know-how and therefore one or more particularly qualified operators. In addition, the time required for this adjustment, which depends on said know-how, can be very long.
  • changing the bending tool can therefore constitute a particularly long step that adversely affects the productivity of the bending operation.
  • the tool When it associates on the same axis of the same bending head, several stacked bending rollers with which therefore cooperate several erasers, the tool is called multi-heights. It will be understood that in this configuration, for the same reasons as those mentioned above, the bending tools of the prior art are complex and not very rigid.
  • the document US7360385 describes a tube bending device of the type comprising at least one bending roller mounted movably in rotation with respect to a frame and at least one eraser.
  • the design of this device increases the number of parts, presents problems of size and positioning accuracy.
  • This characteristic is particularly advantageous in that it makes the pleat eraser and the bending roller integral, but free to rotate, which is particularly innovative.
  • the roller and the eraser form a compact block.
  • Such a design eliminates the operation of adjusting the eraser with respect to the bending roller since these elements are positioned with respect to each other thanks to the plate.
  • the adjustment is carried out once and the tool change does not disturb said adjustments since the roller and eraser assembly is changed.
  • the plate allows the positioning of the fold eraser that it accommodates relative to the axis of rotation of said roller.
  • the device comprises an independent eraser interface which is inserted between the plate and the eraser.
  • the presence of an interposed part can serve as a mechanical interface between the plate and the eraser, which allows finer adjustments.
  • This interface therefore has the function of the eraser support known from the prior art but is in accordance with the invention, integral with the plate (and not the frame) which therefore positions it relative to the axis of rotation of the pebble.
  • said roller comprises an upper cheek and a lower cheek from one of which at least one coaxial cylindrical projection projects outwards, said plate being preformed with at least one bore allowing guiding the cylindrical surface of said projection.
  • said roller comprises an upper cheek and a lower cheek from each of which project outwardly a coaxial cylindrical projection, said plate being composed of two half-plates. each preformed with a bore allowing the guiding of the cylindrical surface of said projection.
  • the roller is therefore retained between two half-plates which leave it free to rotate and which receive the ply eraser directly or via a ply eraser interface.
  • the two half-plates are shared by the stack of rollers and eraser.
  • the cylindrical guide projections then equip only the lower cheek of the roller located at the bottom of the stack and the upper cheek of the roller located at the top of the stack.
  • the device is then particularly compact and precise. It does not require the presence of an additional central shaft, the length of which would depend on the number of rollers to be stacked.
  • the eraser is in a pivot connection on the plate along an axis parallel to the axis of rotation of the roller allowing rotation of the eraser by a limited number of degrees. allowing the eraser to adapt to the stresses to which the tube is subjected.
  • the device comprises an independent pleat eraser interface
  • the latter is in a pivot connection along an axis parallel to the axis of rotation of the roller allowing a rotation of the interface and therefore of the pleat eraser according to a limited number of degrees. .
  • connection between the plate and the eraser interface or between the plate and the eraser can accommodate positioning adjustment means. It will nevertheless be understood that this adjustment is not equivalent to that known from the prior art since when the device of the invention is moved, the positioning adjustment does not have to be redone.
  • the design of the tooling is facilitated. It is the same for its installation.
  • said cylindrical surface of the cylindrical projection is preformed with a groove coming opposite a corresponding groove preformed in the cylindrical surface of the guide bore, a plurality of balls interposed between the grooves in order to guide in rotation.
  • the bending head comprises a frame B relative to which a bending arm 100 provided with movable jaws 110 according to the arrow F1 around a shaft 120 pivots.
  • a bending device referenced D comprising a roller bending 200 associated by means of a plate or yoke 300 to an eraser (which does not appear in these figures).
  • the plate 300 is fixed in rotation to the frame B by the key 400.
  • the rolling surface of the roller 200 is equipped with a jaw 210 opposite which the movable jaw 110 of the bending arm 100 faces each other.
  • the end of the tube to be bent fits between these jaws 110 and 210 before bending, which jaws are tightened (arrow F2) and the rotation according to the arrow F1 around the roller 200 starts as illustrated by the figure 2 .
  • the tube bending device referenced D as a whole comprises at least one bending roller 200 mounted movably in rotation and a fold eraser 500 associated with a fold eraser interface 600.
  • it further comprises a fixed plate 300 composed of two identical half-plates 310 and 320 arranged one above the other so as to form a guide bearing for the roller 200 as well as a reception surface for receiving, supporting and positioning the fold eraser interface 600 which itself accommodates the fold eraser 500.
  • the roller 200 is guided in rotation around the fixed shaft 120.
  • the guide bearing of the plate 300 has the function to allow precise positioning of the receiving surfaces of the eraser interface 600 relative to the axis of rotation of roller 200 without hindering the rotation of said roller 200.
  • said plate is made in a single part equivalent to a single half-plate, guiding the roller at the level of only one of its cheeks.
  • the start of the rotation according to the arrow F1 of the roller 200 is illustrated by the drawing of the figure 7 where the jaw 210 associated with said roller 200 moves away from the eraser 500 gradually replaced by the groove 220 occupying the rest of the rolling surface of said roller 200.
  • the eraser interface 600 and therefore the eraser 500 are pivotally mounted (arrow F3) relative to the plate 300 along an axis parallel to the axis of rotation of the roller 200 and according to a limited number of degrees in order to leave an angular beating allowing an adaptation of the eraser 500 to the stresses to which it is subjected during the bending.
  • the two half-plates 310 and 320 are identical and arranged one above the other, sandwiching the roller 200 and the eraser-fold interface 600.
  • the large central hole 311 and 321 is used for receiving, guiding and retaining the roller 200.
  • the small side hole 312 and 322 is used to receive, guide and retain the eraser interface 600.
  • the notch 313 and 323 is intended to cooperate with the key 400 fixed to the frame (cf. figure 1 ).
  • the fold eraser interface 600 is inserted between the facing inner faces of the half-plates 310 and 320 and receives the fold eraser 500.
  • Cylindrical projections 610 from the erase interface Folds cooperate with the holes 312 and 322.
  • the positioning of this eraser 500 relative to the roller 200 can therefore be very precise and positioned only once without the movement of the device disturbing it.
  • a connecting spacer 330 is inserted between the two half-plates 310 and 320 to ensure the connection between the two while allowing the rotation of the eraser interface 600 and of the roller 200. This spacer 330 is preformed to take up the profile of the notches 313 and 323 and also cooperates in the connection with the key 400.
  • Said roller 200 comprises an upper cheek 230 and a lower cheek 240 from each of which project outwardly a coaxial cylindrical projection (only 231 appears due to the point of view).
  • the cylindrical projections do not project beyond the outer surfaces of the half-plates 310 and 320.
  • This feature facilitates the stacking of the devices in order to create multi-bending tools. - simple, inexpensive and rigid heights.
  • An example of such a tool is illustrated by the figure 3 where above device D is stacked coaxially a device D 'of smaller roller diameter.
  • Another example of such a tool is illustrated by the figure 5 where above a first device D is coaxially stacked another device D turned over to operate in the opposite direction of rotation with respect to the first.
  • said cylindrical surface of the cylindrical projection (only 231 appears) is preformed with a groove coming opposite a corresponding groove preformed in the cylindrical surface of the guide bore ( 311 and 321), a plurality of balls (not shown) being inserted between the grooves in order to guide in rotation.
  • the figure 9 illustrates another embodiment of the bending device D "where the eraser interface 600" is retained by two fixing points on the plate 300 "and therefore does not provide degrees of freedom for the positioning of the eraser. 500 "folds.
  • the figures 10 and 11 illustrate one embodiment of a stacked configuration.
  • the design of the device of the invention makes this configuration particularly compact.
  • this device D3 two rollers 710 and 720 are stacked. Only the upper cheek of the upper roller 720 and the lower cheek of the lower roller are preformed with a cylindrical projection for guidance purposes (for design reasons, only the projection 721 of the roller 720 appears).
  • the upper cheeks of the lower roller 710 and the lower cheeks of the upper roller 720 merge. Consequently, only two half-plates 810 and 820 are necessary despite the doubling of the rollers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP20187723.0A 2019-07-30 2020-07-24 Biegevorrichtung Active EP3771503B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1908654A FR3099394B1 (fr) 2019-07-30 2019-07-30 Dispositif de cintrage

Publications (3)

Publication Number Publication Date
EP3771503A1 true EP3771503A1 (de) 2021-02-03
EP3771503B1 EP3771503B1 (de) 2023-09-20
EP3771503C0 EP3771503C0 (de) 2023-09-20

Family

ID=68654700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20187723.0A Active EP3771503B1 (de) 2019-07-30 2020-07-24 Biegevorrichtung

Country Status (4)

Country Link
US (1) US11565298B2 (de)
EP (1) EP3771503B1 (de)
ES (1) ES2966860T3 (de)
FR (1) FR3099394B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215508464U (zh) * 2021-08-05 2022-01-14 浙江传播者金属装饰材料有限公司 钢管折弯装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1700647A1 (de) * 2005-03-08 2006-09-13 WAFIOS Aktiengesellschaft Biegevorrichtung für stab- und rohrförmige Werkstücke
US7360385B1 (en) 2007-04-17 2008-04-22 Gm Global Technology Operations, Inc. Quick change bend tooling bolster
US20080110223A1 (en) * 2006-11-15 2008-05-15 Benteler Automobiltechnik Gmbh Bending device for a tubular member

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959984A (en) * 1989-08-17 1990-10-02 Ap Parts Manufacturing Company Precision bending apparatus
US6220069B1 (en) * 2000-01-19 2001-04-24 General Electric Company Method and apparatus for bending tubing
ES2272828T3 (es) * 2003-03-15 2007-05-01 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Dispositivo de doblado con herramienta de doblado de varios niveles, una mordaza de sujecion y una unidad de soporte desplazable para dicho dispositivo de doblado.
US7870773B2 (en) * 2007-02-28 2011-01-18 Tennine Corporation Inserted wiper die for high-pressure tube-bending and method of using same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1700647A1 (de) * 2005-03-08 2006-09-13 WAFIOS Aktiengesellschaft Biegevorrichtung für stab- und rohrförmige Werkstücke
US20080110223A1 (en) * 2006-11-15 2008-05-15 Benteler Automobiltechnik Gmbh Bending device for a tubular member
US7360385B1 (en) 2007-04-17 2008-04-22 Gm Global Technology Operations, Inc. Quick change bend tooling bolster

Also Published As

Publication number Publication date
EP3771503B1 (de) 2023-09-20
EP3771503C0 (de) 2023-09-20
US11565298B2 (en) 2023-01-31
FR3099394B1 (fr) 2021-07-09
FR3099394A1 (fr) 2021-02-05
ES2966860T3 (es) 2024-04-24
US20210031255A1 (en) 2021-02-04

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