EP2828015A1 - Bending machine having a bending head that is movable about a stationary bending shank - Google Patents
Bending machine having a bending head that is movable about a stationary bending shankInfo
- Publication number
- EP2828015A1 EP2828015A1 EP13715310.2A EP13715310A EP2828015A1 EP 2828015 A1 EP2828015 A1 EP 2828015A1 EP 13715310 A EP13715310 A EP 13715310A EP 2828015 A1 EP2828015 A1 EP 2828015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- folding
- bending
- head
- finger
- 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
Links
- 238000005452 bending Methods 0.000 title claims abstract description 69
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 238000009740 moulding (composite fabrication) Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 1
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
- B21D7/04—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
- 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
Definitions
- the invention relates to a machine for bending, forming, folding or bending a bar along a bending axis, machine comprising:
- a folding head comprising a folding finger rotatable with respect to the axis of folding
- a feeding station located upstream of the nose of folding to move a bar along a scroll axis and through the nose of folding.
- Such a machine is in particular known from document FR 2 806 943 which describes a machine in which the folding head is movable in translation along an axis perpendicular to the axis of movement of the bar, the folding nose carried by the arm, is movable in translation along the axis of travel relative to the frame and thus relative to the folding head.
- This machine allows a large number of shapes, including loops, and shapes of various diameters.
- the rigidity of the bending nose is altered by the fact that the nose is carried by a movable support and the mechanical play inherent in guiding the telescopic nose.
- the disposition of the movable nose imposes, in the majority of the folding sequences using this disposition, to move the bar in the same proportion as the nose. It follows additional reciprocating movements to those necessitated solely by folding, and therefore a loss of precision in the axial positioning of the bar.
- the axial displacement nose requires the use of a telescopic bar-guide tube having limited guiding qualities.
- the invention proposes a new machine, not having the disadvantages of a machine as described above. More specifically, the invention proposes a machine for bending, forming, folding or bending a bar along a bending axis, machine comprising:
- a folding head comprising a folding finger rotatable with respect to the axis of folding
- a feeding station located upstream of the nose of folding to move the bar along a running axis and through the nose of folding.
- a first connecting rod carrying the folding finger A second connecting rod of which a head is coupled to a head of the first connecting rod in rotation relative to an axis of articulation perpendicular to the axis of movement,
- the folding head is driven in motion by the combination of two connecting rods whose foot is driven in translation along an axis parallel to the axis of travel of the wire.
- An appropriate control of the drive means in translation of the foot of the connecting rods allows the folding finger to move relative to the frame and the folding nose, in translation along the axis of travel (for example horizontal) and / or in translation. along an axis (eg vertical) perpendicular to the scroll axis as will be seen later. It is thus possible to produce at least the same shapes as with a machine according to the prior art described above.
- an appropriate control of the drive means in translation of the foot of the connecting rods also allows movements of the folding finger along other paths in a fold plane passing through the axis of movement so that it is possible to perform a many forms.
- the folding nose can be fixed relative to the arm, since the translational movement of the folding nose with respect to the folding head can be achieved by appropriate control of the translation drive means. from the foot of the connecting rods. As the displacement of the folding head is faster than a displacement of the bending nose, the speed of execution of the bends is greater. In addition, in a machine according to the invention, the mechanical clearances in particular at the level of the fixed bending nose are limited. The quality of the parts produced is thus improved.
- the translational control of the feet of the two connecting rods is sufficient to drive the folding head (the connecting rods, the folding finger) moving. Specific control of the lateral movement of the folding head is not necessary.
- the arm can be rotatably mounted relative to the frame along the axis of scrolling. This allows, before making a folding, to orient the nose of folding relative to the folding head.
- the folding head may also comprise a bending roller rotatably mounted relative to its axis (ie along an axis of the roller) parallel to the axis of folding.
- the roller makes it possible to produce specific shapes, in particular loops and bends beyond 180 °.
- the folding finger can also be freely rotatable along its axis (ie along an axis of the folding finger) parallel to the axis of folding, which considerably limits the frictional forces of the folding finger on the bar to be folded.
- the folding finger, and the roller if there is one are fixed on the folding head, for example on the first connecting rod, rotatable relative to the folding head.
- the folding head comprises a tool removably mounted on the folding head; the tool comprises a support piece on which the folding finger (and the roller if there is one) is mounted; the folding head comprises means for rotating the support piece of the tool along the axis of folding.
- the folding finger, and the roller if there is one, are mounted on a support piece, the support piece assembly, folding finger and roller forming a tool; the tool being removably mounted on the folding head, it is thus very easy to change to make folds of different shapes and / or diameters, while maintaining the same drive means of the folding head in motion.
- the tool may comprise a fixing lug extending from a first face of the support part the tool; the folding finger and possibly the roller extend from a second face of the support piece of the tool, and the folding head further comprises:
- a jaw adapted to receive the fixing lug and to immobilize the fixing lug in rotation and in translation
- a means for driving the jaw in rotation along the axis of folding is provided.
- the lug of the tool and the jaw of the folding head together form a removable attachment means of the tool on the folding head.
- the axis of the jaw, the axis of the lug and the axis of folding are merged.
- the jaw is for example fixed on the head of the first rod.
- the axis of the folding finger or the axis of the bending roller may be confused with the bending axis for specific bends.
- the lateral outer surface of the bending finger and / or the bending roller may have a surface of revolution about the axis of the bending pin or the axis of the roller.
- bending for example a cylindrical surface, or a surface portion of tube closed on itself (cut tube shape closed on itself, a form of revolution obtained from an arc).
- Such a surface is well adapted to allow the rotation of the folding finger or the roller on itself as the folding finger or the roller moves along the bar to be bent, which limits the friction forces .
- the outer surface of the folding finger is locally, on a portion of said outer surface:
- Such a surface is well adapted to marry the best forms of a bar to fold and allows the realization of folds without sliding of the folding finger or the bending roller on the bar to bend.
- FIG. 1a is a partial diagram of a machine according to the invention, a tool taken out of its housing
- FIG. 1b is a kinematic diagram of the elements of FIG.
- FIG. 2a shows a tool comprising a folding finger
- FIG. 2b shows a tool comprising a folding finger and a roller
- FIG. 2c shows another tool comprising a folding finger and a roller
- FIGS. 3a and 3b show the kinematics of a folding on the bending nose
- FIGS. 4a and 4b show the kinematics of a folding on the axis of folding
- FIGS. 6a and 6b show the kinematics of embodiment two against-folds at one time
- Figures 7a and 7b show the kinematics of a fold without slip.
- bar has been used to designate more generally a raw part that can be a bar, a wire, a tube or a profile before bending.
- upstream and downstream are defined in the usual way, along the bar to be folded and in the direction of scrolling of the bar.
- a machine according to the invention comprises:
- a folding head 50 on which is fixed a rotary tool 70 along a folding axis
- a feeding station located upstream of the nose of folding to move a bar along a running axis and through the nose of folding.
- the folding head also includes:
- a second connecting rod 90 a head 91 of which is coupled to the head 81 of the first connecting rod 80 in rotation with respect to an articulation axis A perpendicular to the running axis B and parallel to the folding axis P.
- the folding head further comprises a first drive means 30 for driving in translation a foot 82 of the first connecting rod along an axis parallel to the running axis, and a second driving means 40 for translational driving a foot 92 the second connecting rod 90 along an axis parallel to the axis of travel.
- the foot 82 of the first link 80 is free to rotate relative to the drive means 30 and can thus rotate freely along an axis parallel to the axis of folding.
- the foot 92 of the second link is free to rotate relative to the drive means 40 and can thus freely rotate along an axis parallel to the fold axis.
- the tool 70 comprises a support part 71 comprising a fixing lug 74 extending from a first face of the support part 71 of the tool.
- the folding head 50 comprises means for driving the tool in rotation along the folding axis P. In the examples shown, this driving means comprises:
- Means for driving the jaw in rotation along the axis of folding; the axis of folding, the axis of the jaw and the axis of the pin are combined when the tool is mounted in the jaw.
- the axis of folding P is the axis of the folding head around which the folding finger can be rotated.
- Different tools make it possible to make different bends or bends on bars of different diameter and shape, depending in particular on the shape and diameter of the folding finger, the presence or absence of a roller, the shape and the diameter of the roller, the position of the axis of the folding finger and / or the axis of the roller with respect to the axis of folding, etc.
- a tool mounted on the folding head can easily be replaced by another.
- the folding finger 72 extends from a second face of the support piece and is mounted in free rotation relative to the axis D of the folding finger, parallel to the axis P of folding.
- the tool also comprises a bending roller extending parallel to the folding finger, from the second face of the support piece along an axis G of the roller coinciding with the folding axis P.
- the roller is here mounted in free rotation on its axis.
- the tool also comprises a bending roller 73 extending parallel to the folding finger 72, from the second face of the support piece along an axis G of the roller parallel to the P axis of folding.
- the roller is here mounted in free rotation on its axis.
- the axis of the roller G coincides with the folding axis P and the axis D of the folding finger is offset with respect to the folding axis P.
- the axis of the roller and the axis of the folding finger are offset with respect to the axis of folding.
- the lateral external surface of the folding finger is a surface of revolution about the axis of the folding finger, more precisely a hollow surface forming a groove in which a bar can be positioned. cylindrical to bend. The bar is thus perfectly maintained laterally and can not move in translation along the axis of folding.
- the external surface of the folding finger is locally concave cylindrical, along an axis perpendicular to the axis of the folding finger or the axis of the bending roller, a diameter of the cylinder corresponding to the diameter a bar to bend. It is thus perfectly adapted to rest on the surface of a tube for making a fold without sliding.
- the drive means in rotation of the finger with respect to the axis of folding and the drive means in translation of the ends 82, 92 of the connecting rods are controlled by digital control means, in other words by a control software. user-configurable control depending on the bends to be made.
- the bending axis of the machine is a horizontal axis, perpendicular to the longitudinal axis of the bar to bend.
- the drive means in translation of the ends 82, 92 of the connecting rods allow to accurately position the point intersection of the bending axis of the machine in the vertical plane passing through the longitudinal axis of the bar to bend. Then, the rotation of the folding finger along the axis of folding, possibly in combination with a simultaneous movement of the folding axis, allows the desired folding, as will be seen in the examples below.
- Figures 3a, 3b show the kinematics of a folding of a cylindrical bar on the nose of folding.
- the tool used comprises only a folding finger, the axis of which is offset with respect to the axis of folding.
- the bar is fed through the bend nose, and is immobilized in the bend nose.
- the folding finger 72 In the initial position (FIG 3a), the folding finger 72 is positioned under the bar, in contact with the bar.
- the folding axis perpendicular to the axis of the bar, and passes through the axis of the bar.
- the finger is rotated along the axis of folding, to its final position (Figure 3b).
- the shape of the fold is here given by the shape of the folding nose.
- Figures 4a, 4b show the kinematic embodiment of a fold on the fold axis.
- the tool used comprises a roller whose axis coincides with the axis of folding, and a folding finger whose axis is offset with respect to the axis of folding.
- the bar is fed through the bending nose, and protrudes downstream of the bending nose by a sufficient length to form the bend without the bending head coming into contact with the bending nose.
- the folding axis is positioned relative to the bar so that the roller and the folding finger are in contact with the bar to be folded, one being above and the other below the bar.
- the bending finger is rotated and slides or rolls on the end of the bending bar to the end position (Fig. 4b).
- the folding head being sufficiently far away from the folding nose, the folding can go in the example shown until the realization of a closed loop.
- Figures 5a to 5c show the kinematic embodiment of several successive folds at 90 ° along a cylindrical bar.
- the tool used is the same as in the example of Figures 4a, 4b.
- the first fold closest to the bending nose along the bar
- the second fold downstream of the first has just been completed.
- the roller is positioned inside the second fold
- the folding finger is positioned outside the second fold, downstream of the roller.
- the fold axis is first shifted in translation along an axis parallel to the axis of the bar in the bending nose to the position where the bending is to be made (FIG. ), then the finger is rotated to make the folding (Fig 5c).
- a flat piece with a rectangular section has been made.
- Figures 6a, 6b show the kinematics of simultaneous realization of two against-folds, one on the nose of folding, the other around the roller.
- the tool used is the same as in the example of Figures 4a, 4b.
- the folding axis and the folding finger are positioned so that the finger and the roller are positioned on either side of the bar to be folded and in contact with the bar.
- the fold is then made by moving the folding head (and therefore the folding axis) along a curved path to its final position (FIG 6b), the folding finger being held stationary relative to the axis of folding. folding. Note that here only the folding axis is moved during the folding phase.
- Figures 7a, 7b show the kinematic embodiment of a fold without sliding of a cylindrical bar on the bending nose of the machine.
- the tool used here comprises a folding finger whose axis is offset with respect to the axis of folding.
- the roller is in this example useless.
- the fold In the initial position (Fig. 7a), the fold must be under the bar so that the line perpendicular to the fold axis and passing through the axis of the finger is perpendicular to the bar to bend.
- the fold is then made by moving in rotation the folding head and the folding axis, the finger being held stationary relative to the folding axis (FIG 7b).
- the fold is here produced without slippage, that is to say that the point of contact between the bar and the straight line perpendicular to the axis of folding and passing through the axis of the finger is the same throughout the folding phase .
- the folding finger is immobile, and in particular does not rotate on itself, as may be the case in the previous examples.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1200880A FR2988309B1 (en) | 2012-03-24 | 2012-03-24 | BENDING MACHINE WITH A MOBILE FOLDING HEAD AROUND A FIXED FOLDING NOSE |
PCT/FR2013/050522 WO2013144477A1 (en) | 2012-03-24 | 2013-03-13 | Bending machine having a bending head that is movable about a stationary bending shank |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2828015A1 true EP2828015A1 (en) | 2015-01-28 |
EP2828015B1 EP2828015B1 (en) | 2016-01-20 |
Family
ID=48083489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13715310.2A Active EP2828015B1 (en) | 2012-03-24 | 2013-03-13 | Bending machine having a bending head that is movable about a stationary bending shank |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150040634A1 (en) |
EP (1) | EP2828015B1 (en) |
BR (1) | BR112014023548B1 (en) |
CA (1) | CA2867641C (en) |
FR (1) | FR2988309B1 (en) |
WO (1) | WO2013144477A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT516371B1 (en) * | 2014-12-02 | 2016-05-15 | Stonawski Rudolf | Device for bending a profile workpiece |
CN104889212B (en) * | 2015-06-11 | 2017-01-18 | 张家港江苏科技大学产业技术研究院 | Wheel mould device for two-way pipe bending |
DE102016105935B4 (en) | 2016-03-31 | 2018-04-26 | Wafios Aktiengesellschaft | Winding tool for a spring winding machine |
IT201600119591A1 (en) * | 2016-11-25 | 2018-05-25 | Crippa Spa | Machine for bending filiform material such as a pipe with a system for the simultaneous loading of the pipe to be bent and discharge of the curved pipe |
IT202100022250A1 (en) * | 2021-08-24 | 2023-02-24 | Simat S R L | MACHINE AND PROCEDURE FOR FOLDING AN OBLONG PRODUCT |
IT202100031601A1 (en) * | 2021-12-16 | 2023-06-16 | Schnell Spa | EQUIPMENT AND METHOD FOR BENDING BARS |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2908317A (en) * | 1958-06-18 | 1959-10-13 | Alexander G Sadler | Offset bender |
USRE27021E (en) * | 1969-07-24 | 1971-01-05 | Wire-bending apparatus | |
US3680347A (en) * | 1971-01-13 | 1972-08-01 | Schenck Corp | Bending machine |
SU466698A1 (en) * | 1972-11-30 | 1976-08-05 | Предприятие П/Я В-2190 | Console bending tube bending machine head |
US3952572A (en) * | 1974-01-23 | 1976-04-27 | Case Western Reserve University | Beam bender |
US3986381A (en) * | 1975-05-05 | 1976-10-19 | Vladimir Nikolaevich Shubin | Bending head for a tube bending machine |
FR2715334B1 (en) * | 1994-01-21 | 1996-03-08 | Automatisation Ste Francaise | Machine for bending a material in a substantially straight form. |
CA2221324A1 (en) * | 1997-11-17 | 1999-05-17 | Eagle Precision Technologies Inc. | Tub bending apparatus and method |
FR2806943B1 (en) * | 2000-04-03 | 2002-08-16 | Macsoft | ERASABLE FOLDING NOSE BAR BENDING MACHINE |
IT1320240B1 (en) * | 2000-07-14 | 2003-11-26 | Tauring S P A | PROFILE BENDING MACHINE. |
JP4081593B2 (en) * | 2001-05-18 | 2008-04-30 | 健 一柳 | Long material bending machine |
US8631674B2 (en) * | 2008-12-17 | 2014-01-21 | Aim, Inc. | Devices, systems and methods for automated wire bending |
-
2012
- 2012-03-24 FR FR1200880A patent/FR2988309B1/en not_active Expired - Fee Related
-
2013
- 2013-03-13 BR BR112014023548-1A patent/BR112014023548B1/en active IP Right Grant
- 2013-03-13 US US14/386,270 patent/US20150040634A1/en not_active Abandoned
- 2013-03-13 EP EP13715310.2A patent/EP2828015B1/en active Active
- 2013-03-13 CA CA2867641A patent/CA2867641C/en active Active
- 2013-03-13 WO PCT/FR2013/050522 patent/WO2013144477A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013144477A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2988309A1 (en) | 2013-09-27 |
CA2867641A1 (en) | 2013-10-03 |
FR2988309B1 (en) | 2015-06-05 |
WO2013144477A1 (en) | 2013-10-03 |
BR112014023548B1 (en) | 2020-07-21 |
EP2828015B1 (en) | 2016-01-20 |
CA2867641C (en) | 2019-05-14 |
US20150040634A1 (en) | 2015-02-12 |
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