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EP1199114B1 - Method for automatically bending sections and the like and apparatus for performing the method - Google Patents

Method for automatically bending sections and the like and apparatus for performing the method Download PDF

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Publication number
EP1199114B1
EP1199114B1 EP01124501A EP01124501A EP1199114B1 EP 1199114 B1 EP1199114 B1 EP 1199114B1 EP 01124501 A EP01124501 A EP 01124501A EP 01124501 A EP01124501 A EP 01124501A EP 1199114 B1 EP1199114 B1 EP 1199114B1
Authority
EP
European Patent Office
Prior art keywords
sections
bending
rods
tray
guiding tray
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 - Lifetime
Application number
EP01124501A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1199114A3 (en
EP1199114A2 (en
Inventor
Simone Rupoli
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.)
Schnell SpA
Original Assignee
Schnell SpA
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 Schnell SpA filed Critical Schnell SpA
Publication of EP1199114A2 publication Critical patent/EP1199114A2/en
Publication of EP1199114A3 publication Critical patent/EP1199114A3/en
Application granted granted Critical
Publication of EP1199114B1 publication Critical patent/EP1199114B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a method for automatically bending sections and the like, particularly iron rods for reinforced concrete, and to an apparatus for performing the method, as per the preambles of claims 1 and 2.
  • Such a method and apparatus are known from EP-A-865842.
  • the shaped rods used for example to produce frames for reinforced concrete are generally obtained by means of apparatuses that subject the iron rod, in coils or bars, to a plurality of bending operations.
  • These apparatuses usually have a bending assembly provided with a bending head equipped with a central post and with an eccentric bending post.
  • bending machines are currently known which allow to produce many different products, such as open or closed stirrups, circular or polygonal spirals, straight bars and the like.
  • these bending machines have a plurality of feeders for the iron rod, an assembly 5 for cropping the rods 2 to be bent, and one or more bending assemblies 6 of the cited type, arranged in series.
  • the bending machine Downstream of the bending assembly 6, along the iron rod feeding line 3, the bending machine has a guiding tray 10 that, during a step of operation, receives the portion of the rods that protrudes forward from the bending assembly.
  • the tray 10 has a bottom 11 that can be opened by a lever system actuated by an actuation means. The opening of the bottom of the guiding tray allows to unload the formed sections onto an underlying collection means.
  • the guiding tray limits the length of the bent portions 2a that can be provided at the end of the iron rods.
  • this length designated by h in Figure 1
  • this length has to be less than the height H of the channel formed inside the guiding tray, in order to avoid the interference of the bent portion with the upper part of the tray.
  • the upper part of the tray is at least partially closed at the top, because it has to act as a support for the side walls.
  • the aim of the present invention is to solve the described problem, by providing a method that allows to perform, in a programmed manner, the bending of the end of sections and the like with relatively long bent portions.
  • a further object of the present invention is to provide an apparatus that provides the automatic bending of sections and the like with a structure that is simple and functional, is safely reliable in operation, and highly flexible in use.
  • the reference numeral 1 generally designates the machine for automatically bending sections 2, for example iron rods to be used in reinforced concrete and the like, hereinafter termed simply “rods" for the sake of simplicity.
  • the machine has a line 3 for feeding the rods 2 to be bent, along which there are feeders, whose housing 4 is visible. At the output of the feeders, along the feeder line 3, there is a cropping assembly 5, they be of a conventional type.
  • the bending machine has, downstream of the cropping assembly 5, a bending assembly 6 provided with a bending head 7 that is suitable to bend the end of the rods 2.
  • the bending head 7 has a central post 8 and an eccentric bending post 9 in a per se known manner.
  • the bending machine Downstream of the bending assembly 6, along the feeder line 3 of the rods 2, the bending machine has a guiding tray 10 that receives, during a suitable working step, the portion of the rods 2 that protrudes forward from the bending assembly 6.
  • the guiding tray 10 has a bottom 11 that can open, for example by means of a lever system actuated by an adapted actuation means.
  • the openable bottom 11 forms a longitudinal opening in order to allow the free passage of the bent rod 2.
  • the method according to the present invention comprises actuating the opening of the openable bottom 11 of the guiding tray 10 during the advancement of the rods 2 so as to allow the passage of bent portions 2a of the rods whose length h' exceeds the height H of the guiding tray 10.
  • the opening of the bottom 11 of the guiding tray 10 during the advancement of the rods 2 is actuated automatically in a manner that is appropriately programmed by an electronic processing means, or even manually, if it is necessary to provide, at the end of the rods, bent portions 2a whose length h' exceeds the height H of the guiding tray 10.
  • Figure 4 illustrates a different embodiment of the apparatus, in which the bending head 7 of the bending assembly 6 can move between a first upper bending station, arranged at the feeder line 3, and a second lower bending station, as described in detail in Italian Patent No. 1292692, in the name of this same Applicant.
  • the apparatus is provided with a removable support 12 that is arranged under the guiding tray 10, at the lower bending station.
  • the bending head 7 provides, according to conventional methods, the desired bending of the front end 2a of the rods. Then the advancement of the rods 2 is actuated, and if the length h' of the bent portion 2a exceeds the height H of the guiding tray 10, the opening of the bottom 11 of the tray is also actuated.
  • the bent portion 2a can thus pass freely through the guiding tray 10 and, by flexing, rests with its front part on the underlying support 12, as shown in Figure 4.
  • the rods 2 are cropped to size by the cropping assembly 5. Then the bending head 7 is moved at the lower bending station in order to provide any bending of the rear end of the rods 2, assisting the rear end of the rods by the actuation of a means constituted for example by a movable clamp means 13.
  • the support 12 is moved in order to unload the rods.
  • Figure 5 illustrates another embodiment of the apparatus, provided with a first bending assembly 61, which is arranged in an upper position at the first bending station, and a second bending assembly 62, which is arranged in a downward region in the second bending station.
  • first bending assembly 61 bends the front end 2a of the rods fed along the line 3, in the upper position
  • second bending assembly 62 bends the rear end of the rods after they have been cut to size and transferred to the lower position.
  • the transfer of the rods 2 to the lower position is actuated by a transfer means 14 constituted by a clamp, as shown in detail in the above cited Italian Patent No. 1292692.
  • the transfer clamp 14 can move, under the actuation of appropriate actuators, not only between the above cited upper and lower positions but also between a position that is retracted with respect to the working surface, a working position that coincides with the surface, and a position that protrudes outward with respect to the working surface in order to unload the sections.
  • a traction means 15 adapted to advance the rods 2, preferably constituted by pairs of contrarotating rollers, operates at the bending station.
  • the removable support 12 is conveniently arranged in a lower position with respect to the advancement line of the rods 2 at the exit of the lower bending station, so as to cause the resting of only the front part to bent rods due to the flexing of the rods.
  • the opening of the bottom 11 of the guiding tray 10 allows the free passage of the bent portion 2a of the rods if the length h' of the bent portion 2a exceeds the height H of the guiding tray 10.
  • the apparatus includes, at the lower position, a retractable roller 16 that acts as a support for the portion of the rods 2 that protrudes forward with respect to the traction means 15.
  • the roller 16 supports the rods 2 in order to facilitate their insertion between the traction wheels 15, since the removable support 12 is at a lower height than the lower bending assembly 62 and the traction wheels 15.
  • the above described method and apparatus provide, in a programmed manner, the automatic bending of the end of rods and the like, with relatively long folded portions, according to any preset profile.
  • the present invention provides a method that allows to use, in a different manner, the already-known openable bottom of the tray, whose cycle normally entails that it remains always closed during the operation of the machine and opens only after the section has been cropped.
  • the different cycle essentially consists in that the bottom opens directly after the beginning of traction or directly after bending, in any case substantially before the bent part 2a reaches the tray and certainly before cropping.
  • the materials used may be any according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)
EP01124501A 2000-10-16 2001-10-12 Method for automatically bending sections and the like and apparatus for performing the method Expired - Lifetime EP1199114B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000BO000603A ITBO20000603A1 (it) 2000-10-16 2000-10-16 Metodo di lavoro in macchine per la piegatura automatica di profilatie simili e apparecchiatura per attuare tale metodo
ITBO000603 2000-10-16

Publications (3)

Publication Number Publication Date
EP1199114A2 EP1199114A2 (en) 2002-04-24
EP1199114A3 EP1199114A3 (en) 2003-08-13
EP1199114B1 true EP1199114B1 (en) 2006-03-29

Family

ID=11438793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01124501A Expired - Lifetime EP1199114B1 (en) 2000-10-16 2001-10-12 Method for automatically bending sections and the like and apparatus for performing the method

Country Status (4)

Country Link
EP (1) EP1199114B1 (it)
AT (1) ATE321616T1 (it)
DE (1) DE60118287D1 (it)
IT (1) ITBO20000603A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110814209A (zh) * 2019-09-30 2020-02-21 浙江交工集团股份有限公司 一种箍筋的生产装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1292692B1 (it) * 1997-03-20 1999-02-11 Schnell Spa Procedimento e macchina per la piegatura automatica di profilati e simili.
IT1299921B1 (it) * 1998-03-20 2000-04-04 Schnell Spa Procedimento per la piegatura automatica di profilati metallici e simili e macchina per attuare tale procedimento.

Also Published As

Publication number Publication date
ITBO20000603A0 (it) 2000-10-16
DE60118287D1 (de) 2006-05-18
EP1199114A3 (en) 2003-08-13
EP1199114A2 (en) 2002-04-24
ITBO20000603A1 (it) 2002-04-16
ATE321616T1 (de) 2006-04-15

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