EP2397315B1 - Unite d'entrainement pour une machine d'estampage ou une presse et procede pour faconner une piece a usiner - Google Patents

Unite d'entrainement pour une machine d'estampage ou une presse et procede pour faconner une piece a usiner Download PDF

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Publication number
EP2397315B1
EP2397315B1 EP11004833.7A EP11004833A EP2397315B1 EP 2397315 B1 EP2397315 B1 EP 2397315B1 EP 11004833 A EP11004833 A EP 11004833A EP 2397315 B1 EP2397315 B1 EP 2397315B1
Authority
EP
European Patent Office
Prior art keywords
drive
workpiece
knee lever
press
ram
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.)
Active
Application number
EP11004833.7A
Other languages
German (de)
English (en)
Other versions
EP2397315A2 (fr
EP2397315A3 (fr
EP2397315B8 (fr
Inventor
Paolo Matassoni
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.)
Andritz Technology and Asset Management GmbH
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Andritz Technology and Asset Management GmbH
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Filing date
Publication date
Application filed by Andritz Technology and Asset Management GmbH filed Critical Andritz Technology and Asset Management GmbH
Priority to SI201130758T priority Critical patent/SI2397315T1/sl
Publication of EP2397315A2 publication Critical patent/EP2397315A2/fr
Publication of EP2397315A3 publication Critical patent/EP2397315A3/fr
Publication of EP2397315B1 publication Critical patent/EP2397315B1/fr
Application granted granted Critical
Publication of EP2397315B8 publication Critical patent/EP2397315B8/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/103—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by screw means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means

Definitions

  • the subject of this invention is a drive unit for a punching machine or a press for moving a plunger, wherein the plunger movement composed of a Liftweg for removing and approaching the plunger from and to a workpiece and a working stroke for machining the workpiece.
  • the subject of this invention is also a method for processing a workpiece in which the drive unit according to the invention is used.
  • Actuators for the ram of stamping presses or presses are well known, these are usually spindle, eccentric or hydraulic drives. However, embodiments with linear drives are also known. These drives provide for the stroke movement of the plunger.
  • a punching or forming tool is arranged, through which the workpiece processed, for example, punched or formed, is. For this machining process, a considerable pressing force of the plunger is required.
  • the ram must be lifted with the tool from the sheet, so that the machined workpiece can be transported further or a new sheet can be inserted into the punching machine or in the press.
  • the movement of the plunger from and to the workpiece is referred to as a lift path.
  • the actual machining of the workpiece is carried out in the working stroke.
  • a press or a punching machine according to the prior art is shown.
  • the ram is driven by two high-performance spindle drives of high precision. These spindle drives realize here the Liftweg and the working stroke.
  • Such a device has the disadvantage that the machining time for a workpiece is limited by the spindle drive, because a spindle drive can not be operated arbitrarily fast.
  • the processing speed is limited on the one hand by the spindle drive itself, on the other hand, but also by the tool, which may not penetrate any arbitrary speed in the workpiece, otherwise it will be damaged.
  • the invention is therefore based on the object to disclose a drive unit for a stamping press or a press, with a higher production speed than in conventional systems can be realized and in which the drive unit can be better tuned to the working stroke.
  • the lifting height of the plunger is thus realized by the combination of a power take-off with a main drive.
  • This has the advantage that for the Liftweg mainly the PTO is used, the PTO needed for this only a small drive torque and no complex measuring systems. Thus it is possible to realize a highly dynamic lift stroke.
  • the main drive is used for the actual machining process of the workpiece. Since the auxiliary drive primarily takes over the Liftweg, the speed of the main drive can optimally on the Machining be tuned, without causing the highest possible speed of the main drive is in the foreground.
  • the power take-off on a toggle lever system with upper and lower toggle arms, a toggle joint and a fixed stop, the toggle lever are mechanically locked by the fixed stop.
  • toggle lever system eccentric shaft bearing, eccentric shaft, stroke adjustment, etc.
  • toggle lever system is actuated via a rack drive or via a spindle drive.
  • These drives have a simple structure and are inexpensive to produce.
  • the toggle lever system can also be actuated by a linear drive.
  • Linear actuators work contact-free and are therefore very wear-resistant.
  • high accelerations and high end speeds can be achieved with linear drives.
  • the upper and lower toggle leg on the side facing the fixed stop an angle of more than 181 ° when the toggle leg abut the fixed stop, since thereby the toggle lever system is automatically locked.
  • the main drive is a spindle drive, preferably a servo-driven spindle drive.
  • the spindle drive is free programmable and takes over the overload protection (current consumption measurement), the ram adjustment, the adjustment of the tool installation height and a part of the lifting height.
  • the plunger is simplified and reduced weight by eliminating the ram adjustment and overload protection.
  • the spindle drive can not realize high speeds, the gear ratio and the size of the servo motor can be optimally adapted to the spindle drive.
  • the drive unit according to the invention with spindle drive requires considerably less lubricant.
  • the invention also provides a method for machining a workpiece with a punching machine or a press with the features of claim 5, wherein a plunger is moved by a Liftweg to the workpiece and wherein the workpiece is processed by a subsequent working stroke of the plunger.
  • a plunger is moved by a Liftweg to the workpiece and wherein the workpiece is processed by a subsequent working stroke of the plunger.
  • the Liftweg are essentially carried out by a power take-off and the working stroke by a main drive.
  • the ram can be lowered by a very fast PTO. Thereafter, with the help of the main drive, the actual machining of the workpiece can be performed, this can be done with a lower stroke speed than during the lowering movement.
  • the Liftweg is executed by a toggle lever system with fixed stop in the inventive method.
  • the toggle lever system is already mechanically locked by the fixed stop before running the working stroke for machining the workpiece. This prevents buckling of the toggle lever.
  • FIG. 1 a conventional punching machine or a press is shown.
  • a plunger 5 is guided via plunger guides 4 in a press frame 3.
  • the ram stroke is realized here by a spindle drive, it consists in the present example of two spindles 1, which are each driven by a spindle motor 2.
  • a tool 6 for the machining of a workpiece 8 for example, a sheet attached.
  • the tool 6 may be a punching tool or a forming tool.
  • such a device is used to machine a sheet metal in strip form, wherein, for example, shaped pieces are punched out of the sheet metal. So that the sheet metal strip can be transported further for the subsequent punching or forming process, the tool 6 must be lifted sufficiently high from the sheet metal strip. This movement of the tool 6 from and to the workpiece is referred to as a lift path. In the actual working stroke, the machining of the workpiece 8 takes place.
  • FIG. 2 Now, an embodiment of the drive unit according to the invention for a punching machine or a press is shown. It basically consists of a main drive and a PTO.
  • the main drive is designed here as a spindle drive 20 with a motor 28 and a spindle 21.
  • the spindle eye 22 At the end of the spindle 21 is the spindle eye 22 in which the bolt 23 for connecting the spindle 21 with the plunger 27 (in Fig. 2 not shown) is stored.
  • it is a servo-driven spindle drive 20, which is freely programmable.
  • the auxiliary drive is designed here as a toggle lever system 11.
  • the lifting height of the plunger 27 is realized by the combination of the toggle lever system 11 and the spindle drive 20.
  • the toggle lever system 11 consists essentially of an upper toggle leg 12 and a lower toggle leg 13, which are hinged together via the toggle joint 14.
  • the upper knee lever leg 12 is mounted at the upper end via a head piece bearing pin 10 in a head piece bearing 9.
  • the headstock bearing 9 is fixed to the press frame 30 (in Fig. 2 not shown).
  • the lower toggle leg 13 has at the lower end an adapter plate 19, via which the toggle lever system 11 is connected to the spindle drive 20.
  • the knee lever is actuated via a rack drive.
  • the rack drive consists of a rack motor 16 and a rack 17, via the rack eye 18 with the toggle joint 14th connected is.
  • With the help of the rack and pinion drive 16, 17 of the toggle lever can be bent in a simple manner and istgestreckt.
  • a spindle drive a rotating eccentric drive or a linear drive can be used.
  • the toggle lever system 11 also has a fixed stop 15 against which the toggle leg 12, 13 strike when the toggle lever is extended.
  • the fixed stop is adjusted so that the toggle lever is moved in operation to an angle ⁇ of more than 181 ° before it abuts against the fixed stop 15.
  • the angle ⁇ is the angle which is formed by the upper knee lever leg 12 and the lower knee lever leg 13 on the side of the fixed stop 15. Due to the deflections of the knee lever to over 181 ° ° against the fixed stop 15, this is mechanically locked. Pressing forces exerted by the main drive are thus received via the headstock bearing 9 and the fixed stop 15.
  • Fig. 3 is now a press or a punching machine with two drive units according to the invention Fig. 2 and with a plunger 27, which is guided by plunger guides 25 in the press frame 30 shown.
  • the toggle lever system 11 is here in the maximum bent position.
  • the auxiliary drive is thus at top dead center.
  • the plunger 27 is guided over the plunger guide 25 in the press frame.
  • Fig. 4 is the same device as in Fig. 3 shown, but here is the PTO in the bottom dead center or approximately at the bottom dead center.
  • the knee lever legs 12,13 to the fixed stop 15 form an angle ⁇ of about 181 °.
  • the spindle drives 20 exert a pressing force on the plunger 27 in the direction of the table top 26 for machining a workpiece, the pressing forces occurring on the knee lever legs 12, 13 and the head piece bearing 9 are transmitted to the press frame 30.
  • Part of the press forces is also by the fixed stop 15
  • these forces are relatively low, since the knee lever legs 12, 13 are only in a slightly bent position. It can be seen clearly that no forces can be transmitted to the rack drive 16, 17 by this slight bending of the knee lever legs 12, 13 and by the concerns of the toggle on the fixed stop 15.
  • Noise emissions caused by the stop of the knee lever legs 12, 13 on the stop surface 24 of the fixed stop 15 can be reduced by a cutting impact damping, by elastomeric elements or by gas pressure shock absorbers.
  • the auxiliary drive is used to move the plunger 27 in Liftweg, in addition, the complete drive system can be compensated by ram weight compensation cylinder.
  • the power take-off only needs to have a small drive torque and does not require complex measuring systems. Thus, it is possible to realize a high dynamic lift stroke with low cost and simple parts.
  • the main drive for the actual forming or punching movement of the plunger 27 can be actuated. Since the knee lever legs 12, 13 are supported in an angular position of more than 181 ° on the fixed stop 15, the system is mechanically locked and the high caused by the main drive pressing forces can not lead to buckling of the toggle leg 12, 13.
  • the complete combination drive can be pre-assembled and available as a service part. In the event of a breakdown, the defective system with the service part can be exchanged and repaired without much effort on the part of the demo.
  • the position and amount of the drive units according to the invention consisting of main and auxiliary drive can be freely selected in a stamping machine or a press. It is structurally conceivable to integrate the drive unit as a single drive or as a two-, three-, four- or five-speed drive, since the system can be realized as a transverse or longitudinal drive.
  • the invention results in addition to the lead time reduction and cost advantages, since no complexed parts are needed.
  • the production and assembly are easy.
  • the header complexity is reduced to a minimum, also can be realized a lower overall height of the stamping presses or presses.
  • the embodiments shown in the drawings represent only a preferred embodiment of the invention.
  • the invention also includes other embodiments in which, for example, instead of the spindle drive 20, a hydraulic drive is used as the main drive.
  • the auxiliary drive can be realized as a centric single drive or as a double executed external drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)

Claims (6)

  1. Unité d'entraînement pour une poinçonneuse automatique ou une presse, pour effectuer le mouvement d'un poussoir (27), où le mouvement du poussoir se compose d'une course de levée servant à l'éloignement du poussoir (27) d'une pièce à poinçonner ainsi qu'à son approchement à une telle pièce, et d'une course de travail pour le poinçonnage de la pièce à poinçonner, où l'unité d'entraînement comporte une commande secondaire et une commande principale, et où la course de travail ne s'effectue que par la commande principale et la commande secondaire comporte un système de genouillère (11) avec traverses de genouillère (12, 13) supérieures et inférieures et une articulation de genouillère (14), caractérisée en ce que les traverses de genouillère (12, 13) peuvent être arrêtées mécaniquement moyennant une butée fixe (15), les traverses de genouillère (12, 13) supérieures et inférieures formant un angle (α) de plus de 181° au côté situé en face de la butée fixe (15) quand les traverses de genouillère (12, 13) heurtent la butée fixe (15), ce qui a pour résultat l'arrêt mécanique du système de genouillère (11).
  2. Unité d'entraînement selon la revendication 1, caractérisée en ce que le système de genouillère (11) se trouve actionné par un entraînement à crémaillère (16, 17) ou un entraînement à broche.
  3. Unité d'entraînement selon la revendication 1, caractérisée en ce que le système de genouillère (11) se trouve actionné par un entraînement linéaire.
  4. Unité d'entraînement selon l'une des revendications 1 à 3, caractérisée en ce que la commande principale est un entraînement à broche (20).
  5. Méthode de poinçonnage d'une pièce à poinçonner avec une poinçonneuse automatique ou une presse, où un poussoir (27) se trouve approché à une pièce à poinçonner par une course de levée et où la pièce se trouve poinçonnée par la suite moyennant une course de travail du poussoir (27), la course de levée s'effectuant dans l'essentiel par une commande secondaire et la course de travail s'effectuant par une commande principale, la course de levée se trouvant effectuée par un système de genouillère (11) qui comporte des traverses de genouillère (12, 13) supérieures et inférieures ainsi qu'une articulation de genouillère (14), caractérisée en ce que les traverses de genouillère (12, 13) sont arrêtées mécaniquement par une butée fixe (15) avant que la course de travail pour le poinçonnage de la pièce à poinçonner ne soit effectuée.
  6. Méthode selon la revendication 5, caractérisée en ce qu'après le poinçonnage de la pièce, la commande secondaire et la commande principale sont actionnées en même temps, pour éloigner le poussoir (27) de la pièce à poinçonner.
EP11004833.7A 2010-06-21 2011-06-14 Unite d'entrainement pour une machine d'estampage ou une presse et procede pour faconner une piece a usiner Active EP2397315B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201130758T SI2397315T1 (sl) 2010-06-21 2011-06-14 Pogonska enota za luknjalni stroj ali stiskalnico in postopek za strojno obdelavo obdelovanca

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT10172010A AT510052B1 (de) 2010-06-21 2010-06-21 Antriebseinheit für einen stanzautomat oder eine presse

Publications (4)

Publication Number Publication Date
EP2397315A2 EP2397315A2 (fr) 2011-12-21
EP2397315A3 EP2397315A3 (fr) 2013-09-18
EP2397315B1 true EP2397315B1 (fr) 2016-01-13
EP2397315B8 EP2397315B8 (fr) 2016-05-18

Family

ID=44513338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11004833.7A Active EP2397315B8 (fr) 2010-06-21 2011-06-14 Unite d'entrainement pour une machine d'estampage ou une presse et procede pour faconner une piece a usiner

Country Status (4)

Country Link
EP (1) EP2397315B8 (fr)
AT (1) AT510052B1 (fr)
ES (1) ES2567302T3 (fr)
SI (1) SI2397315T1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6005803B2 (ja) * 2014-07-25 2016-10-12 Thk株式会社 リニアモータ装置及び制御方法
CN104552540B (zh) * 2015-01-16 2017-01-04 石家庄灿高高频机械有限公司 高频单角组装机及其单角组装工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1007792A (en) * 1910-10-17 1911-11-07 Bliss E W Co Press.
JP2534944B2 (ja) * 1991-09-24 1996-09-18 アイダエンジニアリング株式会社 プレス機械
JP3051841B1 (ja) * 1999-08-10 2000-06-12 株式会社放電精密加工研究所 加圧装置
DE20020007U1 (de) * 2000-11-24 2001-03-01 Procon Maschinen Gmbh Stößelantrieb für eine Presse
US7293500B2 (en) * 2003-12-12 2007-11-13 Hoden Seimitsu Kako Kenkyusho Co., Ltd. Press
DE202006004470U1 (de) * 2006-03-21 2006-06-14 Schnupp, Konrad Presshärtepresse
JP2008043992A (ja) * 2006-08-21 2008-02-28 Murata Mach Ltd リニアモータ搭載プレス機械

Also Published As

Publication number Publication date
ES2567302T3 (es) 2016-04-21
AT510052B1 (de) 2013-07-15
SI2397315T1 (sl) 2016-04-29
AT510052A1 (de) 2012-01-15
EP2397315A2 (fr) 2011-12-21
EP2397315A3 (fr) 2013-09-18
EP2397315B8 (fr) 2016-05-18

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