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EP0555752B1 - Outil de cintrage rotatif à graissage permanent - Google Patents

Outil de cintrage rotatif à graissage permanent Download PDF

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Publication number
EP0555752B1
EP0555752B1 EP93101643A EP93101643A EP0555752B1 EP 0555752 B1 EP0555752 B1 EP 0555752B1 EP 93101643 A EP93101643 A EP 93101643A EP 93101643 A EP93101643 A EP 93101643A EP 0555752 B1 EP0555752 B1 EP 0555752B1
Authority
EP
European Patent Office
Prior art keywords
bending tool
rotary bending
bending head
rotating bending
tool according
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
EP93101643A
Other languages
German (de)
English (en)
Other versions
EP0555752A1 (fr
Inventor
Wolfgang Katz
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.)
Danly Corp
Original Assignee
Danly Corp
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 Danly Corp filed Critical Danly Corp
Publication of EP0555752A1 publication Critical patent/EP0555752A1/fr
Application granted granted Critical
Publication of EP0555752B1 publication Critical patent/EP0555752B1/fr
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
    • 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
    • B21D5/042—With a rotational 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor

Definitions

  • the invention relates to a rotary bending tool according to the preamble of claim 1.
  • Rotary bending tools of this type are used in presses, as are known, for example, from US Pat. No. 4,002,049.
  • the shaping is carried out by a combined rotation and displacement movement of the tool.
  • the tool consists of a rotary bending head which has the shape of a cylinder with an approximately V-shaped recess, the angle between the two legs of the V-shaped recess being essentially determined by the bending angle of the molded part to be bent and in most cases is of the order of 90 °.
  • the rotary bending head interacts with its V-shaped recess with a correspondingly designed die, the bent part to be deformed being shaped around the die by the recess in the rotary bending head.
  • the rotary bending head experiences through the descending Saddle block, in which it is rotatably mounted, first a sliding movement, which is overlaid by a rotary movement during the actual deformation process.
  • the storage of the rotary bending head in the saddle block is therefore of the greatest importance, since it must not only transmit the pressing pressure, but at the same time must enable the rotary bending head to rotate as smoothly as possible.
  • This bearing originally consisted of an approximately semicircular recess in the saddle block, in which the rotary bending head was inserted.
  • lubricant was only introduced into the approximately semicircular recess during the first assembly.
  • this type of lubrication is far from sufficient because the lubricant is displaced from the bearing area after a short time.
  • This running dry of the storage increases the resistance quickly, so that the required force in the shaping increases continuously with increasing service life. After a relatively short period of use, there is a risk of the rotary bending head seizing up in the saddle block.
  • the saddle block has a wedge-shaped insert, the position of which can be adjusted in relation to the saddle head.
  • the flanking edge of the wedge-shaped insert takes on the function of another storage area. The adjustability of the wedge insert enables precise adjustment of the bearing play of the rotary bending head in the saddle block.
  • a groove is provided in both the saddle block and in the wedge insert, which receives a lubricant-soaked strand.
  • the groove is designed so that it comprises about three-quarters of the strand. The remaining quarter of the strand is in contact with the rotary bending head. The back and forth movement of the rotary bending head releases lubricant from the impregnated strand.
  • the arrangement of the two lubricant-impregnated strands offset by approximately 180 ° should ensure that more or less the entire lateral surface of the rotary bending head is adequately supplied with lubricant.
  • the strand usually consists of fiber material which has a relatively high absorption capacity for the lubricant.
  • the fibers have the property that they are very easily torn out of the fiber composite when the rotary bending head slides past. Due to the adhesion of the lubricant, they initially adhere to the surface of the rotary bending head and are drawn into the contact point with the bearing surfaces of the saddle block. There they provide increased resistance and wear.
  • the object of the present invention is therefore to provide a generic rotary bending tool in which these problems no longer occur.
  • the invention is based on the idea of providing a permanent lubrication device for the mounting of the rotary bending head, which is integrated in the saddle block.
  • This has the advantage that an adequate supply of lubricant is possible during the entire operating life of the rotary bending tool. A decrease in the lubricating effect or even the dry running of the storage is no longer given.
  • the service life of the rotary bending tool can therefore be increased enormously.
  • the factor limiting the service life is now no longer the mounting of the rotary bending head in the saddle block, but the durability of the bending surfaces, ie the V-shaped recess of the rotary bending head and the contact surfaces of the dies.
  • the centerpiece of the rotary bending tool is the rotary bending head 2. It has an essentially V-shaped recess 21 which extends over the entire length of the rotary bending head.
  • the angle between the two leg surfaces of the V-shaped recess depends on which bending angle is to be realized on the bent part. The most common application is to create a right angle on the bent part. In this case, the angle between the two leg surfaces is also approximately 90 °.
  • the rotary bending head is mounted in a saddle block 1, the bearing surfaces 15, 16, 17 being formed by sub-segments in the form of a circular arc.
  • the storage areas are in the Saddle block arranged so that they support the rotary bending head essentially in an angular range of approximately 180 °.
  • a retaining wedge 3 is fastened to the saddle block in a manner not shown in detail. Its flank 31 is designed in such a way that it forms another bearing area for the rotary bending head 2 at its tapering end.
  • the holding wedge can be changed and fixed in position relative to the rotary bending head 2 and thus also to the saddle block 1. This makes it possible to adjust the bearing play of the rotary bending head 2.
  • the rotary bending head 2 furthermore has a groove 22 with a contact surface 23.
  • a restoring element 5 engages in this groove 22.
  • the restoring element 5 consists essentially of a plunger 51, which is pressed against the contact surface 23 of the rotary bending head 2 under the pretension of a spring 52.
  • the rotary bending head 2 cooperates with a die 9, which is designed in accordance with the V-shaped recess 21 of the rotary bending head 2.
  • the bent part 10 is bent around the die 9 by displacement and simultaneous rotation of the rotary bending head 2, the bending angle being determined by the angle of the V-shaped recess 21.
  • the rotary bending tool In the starting position according to FIG. 1, the rotary bending tool is located directly at the beginning of the deformation process.
  • the rotary bending head 2 rests on the bent part 10 and presses the bent part 10 against the die 9.
  • the front end of the plunger 51 presses against the contact surface 23 with spring support (not shown here).
  • the rotary bending head 2 When the saddle block 1 is moved in the direction of the arrow M, the rotary bending head 2 performs a positively guided rotary movement until the bent part 10 is bent around the die 9 and has come to rest on all sides between the die 9 and the V-shaped recess 21.
  • the rotary bending head 2 with the saddle block 1 is moved upward in the opposite direction of the arrow M.
  • the plunger 51 ensures that the rotary bending head 2 is pressed back into its starting position during the return.
  • a stop not shown here, ensures that the rotary bending head 2 is prevented from turning back beyond the starting position.
  • Lubricant chambers 8 supply the bearing surfaces 15, 16, 17 with lubricant. They are located between the bearing surfaces 15, 16, 17 and are integrated in the saddle block. The volume of the lubricant chambers is dimensioned such that a sufficient supply of lubricant can be introduced for a certain service life of the rotary bending tool.
  • the volume of the lubricant chamber 8 can be kept smaller because of a continuous or discontinuous addition of Lubricant is possible even while the rotary bending tool is in operation.
  • the lubricant chambers 8 extend essentially over the entire axial extent of the rotary bending head 2 to be supported. End closures 11 ensure that the escape of oil on the one hand and the penetration of contaminants on the other hand is avoided.
  • the front ends 11 can be produced in a simple manner by closing the recesses originally continuous in the axial direction.
  • lubricant supply channels 7 For a uniform supply of lubricant, it may be necessary to provide several lubricant supply channels 7 in a parallel arrangement. It is also possible to provide several permanent lubrication devices. This is particularly relevant if the rotary bending tool has a very large axial extent.
  • the lubricant feed channel 7 can be closed at the end with a plug 6.
  • the design in the form of a blind plug is sufficient for cases in which the lubricant only has to be refilled at very large intervals.
  • stopper 6 For more frequent refilling operations, it is advantageous to design the stopper 6 in the manner of a grease nipple.
  • a valve ball 61 supported by spring 63, rests on a valve seat 63 provided in the plug 6.
  • the lubricant supply channel is in a further variant 7 connected to a central lubricant supply system, not shown here. In this case, a fully automatic permanent supply of the bearing points with lubricant is ensured.
  • the return gear 5 is arranged coaxially in the lubricant supply channel 7. This ensures that the contact point between the plunger 51 and the contact surface 23 is permanently supplied with lubricant.
  • oils or fats can also be used as lubricants, but also fully synthetic lubricants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Earth Drilling (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (7)

  1. Outil de cintrage par rotation, consistant en une tête de cintrage (2) de forme cylindrique avec un évidement (21) en forme de V, en un bloc porte-outil (1) avec des surfaces d'appui (15, 16, 17) séparées par au moins un évidement (8) les unes des autres ainsi qu'une clavette d'arrêt (3), servant à recevoir la tête de cintrage (2), en un organe de rappel (5) pour la tête de cintrage (2), en une matrice (9) coopérant avec son évidement (21) ayant la forme d'un V et en un système de lubrification disposé dans le bloc porte-outil (1) pour les surfaces d'appui (15, 16, 17), outil de cintrage par rotation caractérisé en ce que le système de lubrification présente au moins un canal d'alimentation en agent de lubrification (7), canal qui débouche dans l'évidement (8).
  2. Outil de cintrage par rotation selon la revendication 1, caractérisé en ce que l'évidement (8) s'étend essentiellement sur toute la distance axiale des surfaces d'appui (15, 16, 17) et est uniquement limité par des fermetures (11) situées du côté frontal.
  3. Outil de cintrage par rotation selon la revendication 3, caractérisé en ce que les fermetures (11) situées du côté frontal sont des extrémités fermées par matage de l'évidement (8) - qui va axialement tout d'abord d'un bout à l'autre.
  4. Outil de cintrage par rotation selon les revendications 1 à 3, caractérisé en ce que le canal d'alimentation en agent de lubrification (7) est fermé sur son côté d'entrée par un tampon (6).
  5. Outil de cintrage par rotation selon la revendication 4, caractérisé en ce que le tampon (6) présente une bille de soupape (61), qui est maintenue par un ressort (62) contre un siège de soupape (63).
  6. Outil de cintrage par rotation selon l'une des revendications 1 à 3, caractérisé en ce que le canal d'alimentation en agent de lubrification (8) est relié à une installation centrale d'alimentation en agent de lubrification.
  7. Outil de cintrage par rotation selon l'une des revendications 1 à 6, caractérisé en ce que l'organe de rappel (5) présente un poussoir (51), qui est maintenu par un ressort (52) contre une surface d'appui (23) d'une rainure (22) qui guide le poussoir et est disposé de façon coaxiale dans le canal d'amenée de l'agent de lubrification (8).
EP93101643A 1992-02-08 1993-02-03 Outil de cintrage rotatif à graissage permanent Expired - Lifetime EP0555752B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203680 1992-02-08
DE4203680A DE4203680C1 (fr) 1992-02-08 1992-02-08

Publications (2)

Publication Number Publication Date
EP0555752A1 EP0555752A1 (fr) 1993-08-18
EP0555752B1 true EP0555752B1 (fr) 1995-07-05

Family

ID=6451245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101643A Expired - Lifetime EP0555752B1 (fr) 1992-02-08 1993-02-03 Outil de cintrage rotatif à graissage permanent

Country Status (6)

Country Link
US (1) US5341669A (fr)
EP (1) EP0555752B1 (fr)
JP (1) JPH06292926A (fr)
KR (1) KR930017641A (fr)
DE (2) DE4203680C1 (fr)
ES (1) ES2078073T3 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0182069B1 (ko) * 1995-06-22 1999-04-01 송병준 컷팅블레이드의 절곡시스템
US5820326A (en) * 1996-03-29 1998-10-13 Product Investment, Inc. Method and apparatus for making a tamper-evident crown
US5913931A (en) * 1997-11-04 1999-06-22 Ready Technology, Inc. Extended length rotary bending and forming devices and methods for manufacture thereof
US6038908A (en) * 1998-12-08 2000-03-21 Yourbusiness Co., Ltd. Bending die having rotary die
US6021659A (en) * 1999-04-13 2000-02-08 Power Brake Dies, Inc. Rotary bending tool holder
US6065324A (en) * 1999-07-01 2000-05-23 Power Brake Dies, Inc. Rotary bender die
SE9903143L (sv) * 1999-09-06 2000-06-19 Stroemsholmen Ab Anordning vid ett plåtformningsverktyg
JP2001137947A (ja) * 1999-11-15 2001-05-22 Umix Kk プレス金型の付勢装置
DE20018936U1 (de) 2000-11-07 2001-01-25 Trumpf GmbH & Co., 71254 Ditzingen Maschine für die Bearbeitung von Werkstücken, insbesondere Maschine für die Blechbearbeitung sowie Drehbiegewerkzeug für eine derartige Maschine
US6792785B2 (en) * 2003-01-03 2004-09-21 Yourbusiness Co., Ltd. Contact surface structure of bending die
JP4483192B2 (ja) * 2003-03-31 2010-06-16 オイレス工業株式会社 ホルダユニット及びそのホルダユニットを具備したヘミング加工装置
US6983634B2 (en) * 2003-08-01 2006-01-10 Danly Iem Rotary bending tool and method of manufacture
TWM275895U (en) * 2005-01-12 2005-09-21 Shu-Ching Lin Bending structure for stainless steel plate
DE102009010378B3 (de) * 2009-02-26 2010-09-02 Müller Weingarten AG Anlage zum Biegen von Blechteilen
DE202009016427U1 (de) 2009-12-02 2010-03-11 Steinel Normalien Ag Rotationsbiegewerkzeug
IT1397559B1 (it) 2010-01-15 2013-01-16 Scattolon Stampo perfezionato per la piegatura della lamiera
US8322181B2 (en) * 2010-04-29 2012-12-04 Ready Technology, Inc. Rotary bending system
CN104923663A (zh) * 2015-05-25 2015-09-23 祥鑫科技股份有限公司 一次性负角成型的模具
US9744579B2 (en) 2015-10-20 2017-08-29 Dayton Lamina Corporation Rotary bending devices
EP3342496B1 (fr) * 2016-11-02 2019-03-13 Flight Corporation Dispositif de pliage des tôles en forme d'échalon
CN111014368A (zh) * 2019-12-25 2020-04-17 滁州市艾德模具设备有限公司 一种无擦伤折弯机构
CN111842558A (zh) * 2020-06-24 2020-10-30 苏州浪潮智能科技有限公司 一种钣金件无磨痕连续折弯装置
CN112588904A (zh) * 2020-11-27 2021-04-02 贵州航天新力科技有限公司 一种锻件折弯模具及折弯工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002049A (en) * 1975-06-09 1977-01-11 Ready Stamping System, Inc. Forming tool for use in a die assembly
DE2642549A1 (de) * 1976-09-22 1978-03-23 Eckold Vorrichtung Kraftbetriebenes handgeraet
US4434644A (en) * 1982-01-13 1984-03-06 Ready Tools, Inc. Rotary bending and forming devices
US4535619A (en) * 1982-10-13 1985-08-20 Gargrave Robert J Rotary bending, particularly for press brakes
NL8802876A (nl) * 1988-11-22 1990-06-18 Ir Arnold Van Der Goot Inrichting voor het zetten van de rand van een plaat.
EP0427886A1 (fr) * 1989-11-16 1991-05-22 Uemura Metal Industries Co., Ltd. Organe de formage pour pliage angulaire negatif

Also Published As

Publication number Publication date
KR930017641A (ko) 1993-09-20
US5341669A (en) 1994-08-30
JPH06292926A (ja) 1994-10-21
DE4203680C1 (fr) 1993-05-06
EP0555752A1 (fr) 1993-08-18
DE59300317D1 (de) 1995-08-10
ES2078073T3 (es) 1995-12-01

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