WO1996024446A1 - Machine a cintrer les toles - Google Patents

Machine a cintrer les toles Download PDF

Info

Publication number
WO1996024446A1
WO1996024446A1 PCT/EP1996/000435 EP9600435W WO9624446A1 WO 1996024446 A1 WO1996024446 A1 WO 1996024446A1 EP 9600435 W EP9600435 W EP 9600435W WO 9624446 A1 WO9624446 A1 WO 9624446A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
block
carrier body
counterblade
plate
Prior art date
Application number
PCT/EP1996/000435
Other languages
English (en)
Inventor
Antonio Codatto
Original Assignee
Amada Company, 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
Application filed by Amada Company, Ltd. filed Critical Amada Company, Ltd.
Priority to JP8523957A priority Critical patent/JPH11504570A/ja
Publication of WO1996024446A1 publication Critical patent/WO1996024446A1/fr

Links

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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/045—With a wiping movement of the bending blade
    • 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

  • the present invention relates to a bending apparatus for metal sheets and aims to produce a simple and rugged apparatus intended to be installed between two parts, fixed and movable, of a press.
  • this aim is achieved by means of an apparatus characterized in that it comprises two blocks intended to be associated respectively with the fixed part and with the movable part of the press to be moved close and moved away mutually, in that each block is equipped with a respective blank holder, the two blank holders facing one another, in that at least one of the blocks contains a blade-carrier body which is movable with the block itself and has a lateral bending blade and the blank holder of the other block has a channel in which an end part of the body which has the blade can be inserted and one side wall of which is shaped like a counterblade with which the blade is capable of interacting, in that the blank holder of the block which contains the blade-carrier body is in the form of a plate which is slidable in relation to its block in the direction of mutual moving close of the two blocks and is pushed back by resilient means towards the other block to exert a resilient pressure for restraining the piece of metal sheet between the two blank holders, and in that the relative arrangement of the blade-carrier
  • the invention has been designed in its application to a punching press, illustrated and described in a patent application filed on the same date by the same applicant for a "Method and machine for the production of sheet metal panels", to which reference is made.
  • the invention is not limited to this application and relates to any bending apparatus, as claimed, intended to be installed between two parts, fixed and movable, of a press.
  • presses For bending metal sheets, use is made of presses, the blades and counterblades of which have a length which is greater than that of the edge of the maximum length which it is envisaged bending in the press.
  • the press is used below its capacities: it is in fact not rare that a press having a blade and a counterblade of a length of. two metres is utilized for bending the edges of plates of sheet metal, the greatest side of which measures much less than one metre.
  • a manufacturer of panels may find himself in a situation in which he is required to manufacture panels with bent edges, the sides of which measure more than the length of the blades and counterblades of the presses which he has available. This constrains him to equip himself, even if only for occasional work, with a press of a capacity which is greater than that of the presses which he utilizes for his current production, or constrains him to refuse the work which has been ordered from him.
  • a bending apparatus for metal sheets which, as illustrated and described in the above-mentioned patent application of the same date, can comprise at least one bending blade and one counterblade of small length, for example of a few centimetres.
  • the bending apparatus can be mounted in a punching press with multiple punches with selective control, as a consequence of the simple substitution of a punch and of the associated die with two opposed tool-holding blocks, one movable and the other fixed.
  • Figure 1 is a diametral section of a first embodiment of the bending apparatus according to the invention, in a rest state,
  • Figure 2 is a section thereof made essentially according to the line II-II in Figure 1,
  • Figure 3 is a plan view according to the line III-III in Figure 1,
  • Figure 4 is a transverse section made essentially according to the broken line IV-IV in Figure 3,
  • Figures 5 and 6 are partial sections similar to that in Figure 1, which illustrate on a smaller scale the same bending apparatus in successive phases of an operation for bending an edge of a panel of sheet metal,
  • Figure 7 is a elevational view in partial section of a second embodiment of a bending apparatus according to the invention, in a rest state, and
  • Figures 8 to 10 are representations similar to that in Figure 7, which illustrate on a smaller scale the bending apparatus in two successive phases of bending the edge of a panel of sheet metal.
  • the apparatus comprises two opposed tool-holding blocks, lower 10 and upper 12.
  • the lower block 10 is intended to be mounted in a fixed part of a press, for example in a lower die-holding carousel of a multiple-punch punching press.
  • the upper block 12 is intended to be mounted in a slidable manner, according to a working axis Z, for example in an upper punch-holding carousel of a multiple-punch punching press.
  • the upper block is intended to be associated, for the bending operations, with a thruster above so as to receive a thrust downwards according to the arrows F in Figures 1 and 2.
  • the lower block 10 is constituted by an essentially cylindrical solid body, with an upper face 14 which faces the upper block 12.
  • An essentially diametral channel 16 is made in the face 14.
  • One side wall of the channel 16 is nose-shaped to constitute a fixed counterblade 18.
  • the upper block 12 is also constituted by a body which is essentially solid and of essentially cylindrical external shape, and has a longitudinal cylindrical cavity 20. Associated with the block 12 is a slidable plate, which is situated on the side turned towards the surface 14 of the lower block 10 and serves as upper blank holder.
  • the plate 22 has an upper cylindrical end piece 24 which is mounted slidably in the cavity 20 by means of a ball bushing 26 and a sleeve 28.
  • a guide pin 30 projects from the block 12 at the bottom, which pin extends in a corresponding cylindrical cavity 32 of the plate 22, with the interposition of a ball bushing.
  • An essentially diametral blind cavity 36 is formed in the body 12, which opens in a position facing the channel 16.
  • a blade-carrier body 38 is suspended in the cavity 36.
  • the slidable plate 22 has an essentially diametral through-opening 40 aligned on the one hand with the cavity 36 and on the other hand with the channel 16.
  • a lower part of the blade-carrier body 38 extends through the through-opening 48, where it is guided, in relation to the plate 22, by means of a resilient tappet 42.
  • the lower end of the blade-carrier body 38 On the side turned towards the counterblade 18, the lower end of the blade-carrier body 38 has a bending blade 44.
  • the lower end of the blade- carrier body 38 has a rounded edge 46.
  • the side wall of the channel 16 opposite the counterblade 18 has a ramp surface 48 with which the rounding 46, as will be seen, is intended to interact in the manner of a follower surface.
  • the blade-carrier body 38 has its fulcrum about an axis of oscillation parallel with the blade 44.
  • the body 38 is equipped with a pin 50 fixed to the body 12 by means of fixed brackets 52 and on which the body 38 is suspended by means of oscillating brackets 54.
  • the plate 22 is pushed back towards the lower block 10 by resilient means constituted by a pair of compression springs 56.
  • the blade-carrier body 38 has maintained the relative position in Figure 1 and its blade 44, which is situated in line with the lower end of the opening 40, has come to be placed on the edge to be bent of the sheet P.
  • the upper blank holder 22 has remained still against the sheet P while the upper block 12 has descended further against the force of the springs 56.
  • the blade-carrier body 38 has descended further together with the upper block 12 and its lower end, with the blade 44, has penetrated into the channel 16, with the consequent interaction of the blade 44 with the counterblade 18.
  • its follower surface constituted by the rounding 46 has engaged the associated ramp surface 48 with a consequent progressive moving of the active edge of the blade 44 close to the counterblade 18 (towards the right in the figures) , which has contributed to the execution of a correct bend.
  • the lower block 110 is in the form of a cup with a cavity which contains bending equipment like that of an embodiment described and illustrated in the patent application filed on the same date by the same applicant for a "Bending apparatus for sheets". For all the details of this equipment, reference is made to the contents of this application.
  • a blade- carrier body 60 Situated in the cavity of the block 110 is a blade- carrier body 60 with an upper part which extends through an opening 62 made in an upper transverse covering wall 64 of the block 110.
  • the blade-carrier body 60 has a bending blade 64.
  • the upper face, designated by 114, of the plate 60 has a channel 116 which is entirely similar to the channel 16 in Figures 1 to 6 and has a similar function with regard to the blade 64.
  • the slidable plate 122 above entirely similar to the plate 22 in Figures 1 to 6, has in turn a channel 68 which lies above the through-opening 62 and the blade 66.
  • One side wall of the channel 68, on the side of the blade 66, has a nose 70 which serves as a counterblade.
  • a return member in the form of a rocker 72 Situated in the cavity of the block 110 is a return member in the form of a rocker 72.
  • a lower part of the blade-carrier body 60 engages an arm of the rocker 72, while the other arm of the rocker 72 is engaged by a tappet 74 in the form of a plate, guided in a slidable manner in an opening 76 of the covering plate 64.
  • the tappet plate 74 is situated below a pin 130, entirely similar to the pin 30 in Figures 1 to 6.
  • the pin 130 which is integral with the upper block 112, constitutes a moving member which, when the upper block 112 descends, engages in a thrusting manner the tappet 74, making the rocker 72 rotate and thus raising the blade-carrier body 60, the blade 66 of which comes to interact with the counterblade 70.
  • the apparatus in Figure 7 incorporates equipment similar to that of the first embodiment in Figures 1 to 6, for executing downward, so-called "negative", bends.
  • the upper block 112 has a transverse cavity 136 which is open towards the bottom and aligned with a transverse through-opening 140 of the sliding plate 122.
  • the blade of the blade-carrier body 138 is designated by 144 and is intended to interact with a counterblade 118 constituted by a nose-shaped part which defines a corresponding side wall of the channel 116.
  • the blade-carrier body 138 is articulated to an upper transverse pin 150 similar to the pin 50 in Figures 1 to 6.
  • the pin 150 is suspended on a slide 152 which can slide vertically in an upper part of the cavity 136.
  • the slide 152 is suspended in turn by resilient means in the form of one or more traction springs like 154 which ensure that all the equipment constituted by the blade- carrier body 138, by its pin 150 and by the slide 152 is restored upwards to an inactive position.
  • the slide 152 has an upper rounded wedging surface with which a corresponding oblique wedging surface of a bolt 156, which is slidable transversely in the upper block 112, is engaged.
  • the bolt 156 can be actuated in a reciprocating manner by means of a hydraulic or pneumatic actuator 158 fixed laterally on the upper block 112.
  • the arrangement is such that when the bolt 156 is retracted towards the actuator 158, as in Figure 7, with the descent of the upper block 112, the blade-carrier body 138 does not descend below the lower surface of the slidable plate 122, as a result of which the upper blade 144 remains permanently withdrawn in relation to the plate 122 and does not act.
  • This makes it possible to use the apparatus for executing "positive" bends by means of the blade 66 and of the counterblade 70, as described above.
  • the pin 30 has made the tappet 74 descend and therefore, by means of the rocker 72, has made the lower blade-carrier body 60 and its blade 66 ascend to the active position of interaction with the counterblade 70.
  • This movement has no effect, however, since, in the execution of a "negative" bend, the panel P is not situated in the zone of the blade 66 and of the counterblade 70.
  • the two blade-counterblade pairs 66-70 and 118-144 lend themselves to use in succession for executing S-shaped or Z-shaped bends in one and the same edge of a plate of sheet.
  • the bending operations can take place by successive steps or lengths along an edge of a plate or panel of sheet.

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)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'appareil objet de l'invention comprend deux blocs (10, 12) destinés à être respectivement associés à la partie fixe et à la partie mobile d'une presse, et conçues pour se rapprocher ou s'éloigner l'une de l'autre. Chaque bloc (10, 12) est équipé d'un porte-ébauche (14, 22). L'un des blocs (12) comporte un corps porte-lame (38) mobile avec le bloc lui-même et doté d'une lame latérale de cintrage (44). Le porte-ébauche (14) de l'autre bloc comporte un canal (16) dans lequel l'extrémité du corps (38) peut être insérée et dont une paroi latérale est en forme de contre-lame (18) avec laquelle la lame (44) peut interagir. Le porte-ébauche du bloc (12) est en forme de plaque (22) coulissant sur le bloc dans le sens de déplacement relatif des deux blocs (10, 12) et est repoussé par des moyens élastiques (56) vers l'autre bloc de manière à exercer une pression élastique destinée à retenir la tôle. La configuration relative est conçue de sorte que la lame de cintrage (44) ne dépasse pas de ladite plaque (22) quand cette dernière est en position de retrait maximum par rapport au bloc (12).
PCT/EP1996/000435 1995-02-06 1996-02-02 Machine a cintrer les toles WO1996024446A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8523957A JPH11504570A (ja) 1995-02-06 1996-02-02 薄板金属の折り曲げ装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO95A000073 1995-02-06
IT95TO000073A IT1278356B1 (it) 1995-02-06 1995-02-06 Attrezzatura piegatrice per lamiere.

Publications (1)

Publication Number Publication Date
WO1996024446A1 true WO1996024446A1 (fr) 1996-08-15

Family

ID=11413147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/000435 WO1996024446A1 (fr) 1995-02-06 1996-02-02 Machine a cintrer les toles

Country Status (3)

Country Link
JP (1) JPH11504570A (fr)
IT (1) IT1278356B1 (fr)
WO (1) WO1996024446A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7490501B2 (en) 2002-10-01 2009-02-17 Amada Company, Limited Method of processing formed product, and metal cope and metal drag used for the method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455857A (en) * 1979-08-02 1984-06-26 Salvagnini Transferica S.P.A. Forming press for bending a blank
US4722214A (en) * 1985-03-12 1988-02-02 Murata Kikai Kabushiki Kaisha Split die for holding work during bending operation
US4783984A (en) * 1981-10-09 1988-11-15 Voest-Alpine Aktiengesellschaft Apparatus for folding a sheet metal element
EP0293964A2 (fr) * 1987-06-03 1988-12-07 SALVAGNINI S.p.A. Machine pour plier des tôles ayant une pince de serrage à compression uniforme
EP0298056A2 (fr) * 1987-07-03 1989-01-04 Antonio Codatto Presse plieuse pour tôles
EP0490828A1 (fr) * 1990-12-07 1992-06-17 SAMAT S.r.l. Machine de pliage pour tôles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455857A (en) * 1979-08-02 1984-06-26 Salvagnini Transferica S.P.A. Forming press for bending a blank
US4783984A (en) * 1981-10-09 1988-11-15 Voest-Alpine Aktiengesellschaft Apparatus for folding a sheet metal element
US4722214A (en) * 1985-03-12 1988-02-02 Murata Kikai Kabushiki Kaisha Split die for holding work during bending operation
EP0293964A2 (fr) * 1987-06-03 1988-12-07 SALVAGNINI S.p.A. Machine pour plier des tôles ayant une pince de serrage à compression uniforme
EP0298056A2 (fr) * 1987-07-03 1989-01-04 Antonio Codatto Presse plieuse pour tôles
EP0490828A1 (fr) * 1990-12-07 1992-06-17 SAMAT S.r.l. Machine de pliage pour tôles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7490501B2 (en) 2002-10-01 2009-02-17 Amada Company, Limited Method of processing formed product, and metal cope and metal drag used for the method
CN102248082A (zh) * 2002-10-01 2011-11-23 株式会社阿玛达 成形制品的加工方法中使用的下模具
CN102248082B (zh) * 2002-10-01 2015-02-04 株式会社阿玛达 成形制品的加工方法中使用的下模具

Also Published As

Publication number Publication date
ITTO950073A0 (it) 1995-02-06
ITTO950073A1 (it) 1996-08-06
JPH11504570A (ja) 1999-04-27
IT1278356B1 (it) 1997-11-20

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