EP2208552B1 - Procédé et dispositif destinés à couper fin des pièces à usiner - Google Patents

Procédé et dispositif destinés à couper fin des pièces à usiner Download PDF

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Publication number
EP2208552B1
EP2208552B1 EP09000652A EP09000652A EP2208552B1 EP 2208552 B1 EP2208552 B1 EP 2208552B1 EP 09000652 A EP09000652 A EP 09000652A EP 09000652 A EP09000652 A EP 09000652A EP 2208552 B1 EP2208552 B1 EP 2208552B1
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EP
European Patent Office
Prior art keywords
cutting
punch
counter
plate
support
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
EP09000652A
Other languages
German (de)
English (en)
Other versions
EP2208552A1 (fr
EP2208552B2 (fr
Inventor
Martin Zimmermann
Martin Watermann
Konrad Trump
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.)
Finova Feinschneidtechnik GmbH
Original Assignee
Finova Feinschneidtechnik GmbH
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Publication date
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Priority to ES09000652.9T priority Critical patent/ES2361140T5/es
Priority to EP09000652.9A priority patent/EP2208552B2/fr
Priority to AT09000652T priority patent/ATE505278T1/de
Priority to SI200930040T priority patent/SI2208552T2/sl
Priority to DE502009000546T priority patent/DE502009000546D1/de
Application filed by Finova Feinschneidtechnik GmbH filed Critical Finova Feinschneidtechnik GmbH
Priority to PL09000652T priority patent/PL2208552T5/pl
Publication of EP2208552A1 publication Critical patent/EP2208552A1/fr
Publication of EP2208552B1 publication Critical patent/EP2208552B1/fr
Publication of EP2208552B2 publication Critical patent/EP2208552B2/fr
Application granted granted Critical
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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/28—Making other particular articles wheels or the like gear wheels

Definitions

  • the invention relates first to a method for fine cutting of workpieces, such as gears od.
  • the material preferably sheet metal
  • clamped at least between a press plate and a cutting plate and a cutting punch is forcibly guided by means for guiding and the workpiece by means of a cutting contour and cutting surfaces of the cutting punch and an oppositely acting, guided in the cutting plate counter-holder is cut out.
  • Such a method according to the prior art is basically from DE OS 3324680 known.
  • this is a process in which the material - usually a metal strip - is firmly clamped before and during the cutting process and guided with narrow tolerances.
  • the sheet metal strip is clamped between the cutting plate and the pressure plate before the cutting process.
  • An additional clamping of the metal strip is done between the anvil and the cutting punch, with the respective forces initially keep the balance.
  • By increasing the punch force of the cutting process is initiated, so that the punch displaces the counter-holder.
  • the cut-out workpiece is ejected from the counter-holder from the cutting plate and advanced the metal strip for the next cutting operation.
  • Such a method advantageously has a significantly reduced cutting gap with respect to stamping, as a result of which a higher dimensional accuracy of the cut surfaces is achieved.
  • the object of the invention is to provide a new method for fine cutting of workpieces, such as gears od. Like., which has a wider range of applications.
  • the inventive method for fine blanking has the fundamental advantage that the application of fineblanking is extended to workpieces whose cut surfaces are not perpendicular to the sheet plane, making it possible, for example, to produce the increasingly important helical gears. Since only the time-consuming machining production of helical gears was possible in the past, the inventive method not only allows a significant expansion of the application of fineblanking, but also a much cheaper production of helical gears.
  • the helical gears can not be cut directly from a sheet metal strip, but it must previously sheet blanks (boards) are created, the outer diameter have the later tip diameter of the helical gear.
  • the board having a corresponding opening is fixed against rotation on the underside of the cutting punch.
  • the cutting process is initiated.
  • the cutting punch is pressed down with the board arranged underneath.
  • the cutting punch and counter-holder before fine cutting a position to each other, in which the extension of the respective cutting surfaces are superimposed and move punch and counter-holder during fine cutting in terms of their rotation synchronously.
  • the quality of the created cut surfaces, in particular in the workpiece area close to the counter-holder, is significantly improved by this interaction between the punch and the counter-holder, since the counter-holder has an improved support function with respect to the workpiece during the cutting process.
  • the invention according to claim 4 relates to a device for fine cutting of workpieces, such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • a device for fine cutting of workpieces such as gears od.
  • the object of the invention is to provide a device which has an extended application range in the production of workpieces by means of the fine blanking technique.
  • the essential advantage of the new apparatus for fineblanking according to the invention now consists in the fact that it can also be used to create cut surfaces which are not arranged perpendicular to the sheet plane. As a result, it is now possible to expand the field of application of fineblanking, for example, to the increasingly important helical gears.
  • the counter-holder and the cutting plate are rotatably arranged relative to one another and have a cutting contour of analogous design to the cutting punch and cutting surfaces.
  • the cutting punch and the counter-holder are rotatably mounted and the Press plate and the cutting plate reversible, but mounted vertically movable.
  • An additional device for the synchronization of cutting punch and counter-holder with respect to their cutting lines and the rotational speed during fine cutting has a particularly preferred embodiment of the invention. This improves the interaction of the cutting punch and the counter-holder during the cutting process, so that the quality of the created cut surfaces is greater, in particular in the workpiece area close to the counter-holder, since the counter-holder has an improved support function relative to the workpiece during the cutting process.
  • the cutting punch has a punch foot which is rotatably mounted in a pressure space which is filled with hydraulic fluid.
  • the Fig. 1 shows that, in contrast to punching during fine cutting in addition to a cutting punch A and a cutting plate B, a counter-holder C and a guide plate D is present, wherein in the guide plate D a ring spike E is integrated, with a complete clamping of the metal strip G in the Cutting line is enabled. Due to the complete clamping of the metal strip G, there is a pure shear in the shearing zone during the cutting process, whereby completely smooth cut surfaces without fracture zones can arise. This is achieved, inter alia, by a significantly reduced cutting gap.
  • Fig. 1 shows that in fine cutting according to the prior art, the cutting punch A performs a purely vertical, at right angles to the metal strip G extending cutting motion, so that the created cut surfaces are arranged at a right angle to the sheet metal strip plane.
  • Fig. 2 is a helical gear S shown, which nowadays has a wide range of applications in different embodiments, but with a device according to the Fig. 1 can not be produced according to the prior art.
  • Such a device 10 is formed on the one hand by a rotating cutting punch 11, which is arranged in a rotationally fixed guide plate 12.
  • the cutting punch 11 has an external helical gearing 13 a and is guided by a matching internal helical gearing 13 b of the guide plate 12.
  • the device 10 a within a rotationally fixed cutting plate 15 also rotatably arranged counter-holder 14 with a helical toothing 16 a , which is also guided by means of a helical toothing 16 b of the cutting plate 15.
  • the aforementioned helical gears 13 a and 16 a of the cutting punch 11 and the counter-holder 14 are provided with arranged at an angle to the vertical cutting surfaces.
  • a metal strip 17 is arranged, which is additionally fully clamped by a ring not shown between cutting plate 15 and guide plate 12.
  • the cutting punch 11 and counter-holder 14 with their respective helical gears 13 and 16 a position to each other assume that the respective cutting surfaces of the helical gears 13 and 16 have matching cutting lines s.
  • the device 10 is provided in a manner not shown with a device for the exact positioning of the helical teeth 16 of the counter-holder 14 to the helical teeth 13 of the punch 11.
  • a so-called top 20 is provided with a pressure chamber 21 in which a Stempelfuß 22 is guided vertically movable, which is connected to the cutting punch 11.
  • the pressure chamber 21 is filled with a hydraulic fluid, preferably oil, and closed in a manner not shown by a check valve. With the help of this arrangement, a storage of the cutting punch 11 during the cutting process by means of an oil pad 23 is possible.
  • the oil pad 23 as a variant of the so-called hydrostatic principle ensures automatically then the separation of the surfaces of Stkovfuß 22 and 20 set when the loads are large.
  • the effort for the supply of the device is extremely low, since the fine cutting oil used as a pressure medium already in a suitably biased reservoir to the press for Available.
  • the Stempelfußes 22 By the storage of the Stempelfußes 22 on an oil pad 23, the required separation of the surfaces of Stempelfuß 22 and 20 set is reliably met. Due to the generous thickness of the oil pad 23 of several millimeters, the Stempelfuß 22 rotates at all times exclusively on the oil pad 23. A backflow of oil through the supply line is prevented by a non-illustrated check valve, the effect of which increases itself with increasing pressure in the oil pad 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Punching Or Piercing (AREA)
  • Turning (AREA)
  • Control Of Cutting Processes (AREA)

Claims (10)

  1. Procédé pour couper fin des pièces à usiner, comme des roues dentées ou similaires, selon lequel le matériau, de préférence de la tôle, est serré au moins entre une plaque de serrage et une plaque de découpage (15), et un poinçon de coupage (11) est contraint de se déplacer au moyen d'un dispositif de guidage et la pièce à usiner est découpée à l'aide d'un contour de coupe ainsi que des faces de coupe du poinçon de coupage (11) et d'un contre-appui (14) guidé dans la plaque de découpage (15) agissant en sens inverse, caractérisé en ce que, pendant l'opération de coupe, au moins le poinçon de coupage (11) exécute un mouvement relatif vertical et, en même temps, un mouvement relatif rotatif par rapport à la plaque de découpage (15).
  2. Procédé selon la revendication 1, caractérisé en ce que, pendant l'opération de coupe, le contre-appui (14), également, exécute un mouvement relatif vertical et, en même temps, un mouvement relatif rotatif par rapport à la plaque de découpage (15).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le poinçon de coupage (11) et le contre-appui (14) présentent l'un par rapport à l'autre, avant le coupage fin, une position selon laquelle les prolongements des faces de coupe respectives sont superposés et en ce que, pendant le coupage fin, le poinçon de coupage (11) et le contre-appui (14) se déplacent de façon synchrone en ce qui concerne leur rotation.
  4. Dispositif (10) pour couper fin des pièces à usiner, comme des roues dentées ou similaires, essentiellement composé d'un poinçon de coupage (11) muni d'un contour de coupe, de faces de coupe et d'un dispositif de guidage forcé, d'une plaque de serrage ainsi que d'une plaque de découpage (15), dans laquelle est guidé un contre-appui (14), sachant qu'entre la plaque de serrage et la plaque de découpage (15), une tôle peut être maintenue inamoviblement, caractérisé en ce qu'au moins le poinçon de coupage (11) et la plaque de découpage (15) sont disposés orientables, de façon relative, l'un par rapport à l'autre et en ce que le poinçon de coupage (11) est muni de faces de coupe disposées selon un angle par rapport au sens vertical de déplacement du poinçon de coupage (11).
  5. Dispositif selon la revendication 4, caractérisé en ce qu'aussi, le contre-appui (14) et la plaque de découpage (15) sont disposés orientables, de façon relative l'un par rapport à l'autre et qu'il présente également un contour de coupe réalisé de façon analogue au poinçon de coupage (11) et des faces de coupe.
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le poinçon de coupage (11) et le contre-appui (14) sont placés de manière orientable, et en ce que la plaque de serrage (12) et la plaque de découpage (15) sont placées non-orientables, mais mobiles verticalement.
  7. Dispositif selon l'une des revendications 4 à 6, caractérisé par un dispositif pour synchronisation du poinçon de coupage (11) et du contre-appui (14), en ce qui concerne leur ligne de coupe et la vitesse de rotation pendant le coupage fin.
  8. Dispositif selon l'une des revendications 4 à 7, caractérisé en ce que le poinçon de coupage (11) présente un talon de poinçonnage (22) qui est logé de manière orientable dans un espace de pression (21) lequel est rempli de liquide hydraulique.
  9. Dispositif selon la revendication 8, caractérisé en ce que l'espace de pression (21) est obturé par un clapet anti-retour.
  10. Dispositif selon l'une des revendications 4 ou 9, caractérisé en ce que le contour de coupe ou les faces de coupe du poinçon de coupage (11) ou du contre-appui (14) est/sont réalisé(es) en tant que denture oblique (13a, 16a).
EP09000652.9A 2009-01-19 2009-01-19 Procédé et dispositif destinés à couper fin des pièces à usiner Active EP2208552B2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP09000652.9A EP2208552B2 (fr) 2009-01-19 2009-01-19 Procédé et dispositif destinés à couper fin des pièces à usiner
AT09000652T ATE505278T1 (de) 2009-01-19 2009-01-19 Verfahren und vorrichtung zum feinschneiden von werkstücken
SI200930040T SI2208552T2 (sl) 2009-01-19 2009-01-19 Postopek in naprava za fino rezanje obdelovancev
DE502009000546T DE502009000546D1 (de) 2009-01-19 2009-01-19 Verfahren und Vorrichtung zum Feinschneiden von Werkstücken
ES09000652.9T ES2361140T5 (es) 2009-01-19 2009-01-19 Procedimiento y dispositivo para el corte de precisión de piezas de trabajo
PL09000652T PL2208552T5 (pl) 2009-01-19 2009-01-19 Sposób i urządzenie do wykrawania dokładnego części obrabianych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09000652.9A EP2208552B2 (fr) 2009-01-19 2009-01-19 Procédé et dispositif destinés à couper fin des pièces à usiner

Publications (3)

Publication Number Publication Date
EP2208552A1 EP2208552A1 (fr) 2010-07-21
EP2208552B1 true EP2208552B1 (fr) 2011-04-13
EP2208552B2 EP2208552B2 (fr) 2014-06-04

Family

ID=41323560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09000652.9A Active EP2208552B2 (fr) 2009-01-19 2009-01-19 Procédé et dispositif destinés à couper fin des pièces à usiner

Country Status (6)

Country Link
EP (1) EP2208552B2 (fr)
AT (1) ATE505278T1 (fr)
DE (1) DE502009000546D1 (fr)
ES (1) ES2361140T5 (fr)
PL (1) PL2208552T5 (fr)
SI (1) SI2208552T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022205021A1 (de) 2022-05-19 2023-11-23 Universität Stuttgart, Körperschaft Des Öffentlichen Rechts Niederhalter für ein Schneidwerkzeug zum Scherschneiden eines Werkstücks

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011102288B4 (de) 2011-05-23 2013-03-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Herstellung eines Stirnrads mit einer Schrägverzahnung
BR112015000346A2 (pt) * 2012-07-06 2017-06-27 Yield Force S L prensa de estamparia
EP2842653B1 (fr) * 2013-08-28 2016-05-11 Feintool International Holding AG Outil et procédé de fabrication de pièces découpées
CN104001806B (zh) * 2014-06-05 2015-09-30 武汉理工大学 一种斜齿圆柱齿轮的板料成形模具及方法
DE102015204415A1 (de) * 2015-03-12 2016-09-15 Bayerische Motoren Werke Aktiengesellschaft Schlagschneidwerkzeug
CN108435912B (zh) * 2018-03-08 2020-06-30 皖西学院 一种圆柱斜齿轮扭压成形模具及其成形方法

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IT1137113B (it) 1981-03-31 1986-09-03 Stama Spa Procedimento per la tranciatura di ruote dentate a profilo elicoidale e prodotti cosi' ottenuto
DE3234771A1 (de) † 1982-09-20 1984-03-22 Alfred Teves Gmbh, 6000 Frankfurt -verfahren zum stanzschneiden einer verzahnung und vorrichtung zur durchfuehrung des verfahrens
AU571538B2 (en) † 1983-06-28 1988-04-21 Repco Ltd. Hydraulic press
DE3324680A1 (de) 1983-07-08 1985-01-24 DAKO-Werkzeugfabriken David Kotthaus GmbH & Co KG, 5630 Remscheid Verfahren zum feinschneiden von werkstuecken und feinschneidwerkzeug zur ausuebung des verfahrens
JP2879187B2 (ja) * 1993-10-18 1999-04-05 大岡技研株式会社 多段歯車の鍛造方法及び装置
JP2002307130A (ja) * 2001-04-11 2002-10-22 Araco Corp リングギヤの製造方法及びそれに用いる装置
JP3975715B2 (ja) * 2001-10-10 2007-09-12 トヨタ紡織株式会社 プレス成形方法及びそれに用いる装置
DE102004019673A1 (de) † 2003-04-22 2004-11-18 Neumayer Holding Gmbh Verfahren zur Herstellung eines napfförmigen Ringteiles mit Innenverzahnung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022205021A1 (de) 2022-05-19 2023-11-23 Universität Stuttgart, Körperschaft Des Öffentlichen Rechts Niederhalter für ein Schneidwerkzeug zum Scherschneiden eines Werkstücks

Also Published As

Publication number Publication date
ES2361140T3 (es) 2011-06-14
EP2208552A1 (fr) 2010-07-21
EP2208552B2 (fr) 2014-06-04
PL2208552T5 (pl) 2014-10-31
PL2208552T3 (pl) 2011-09-30
ES2361140T5 (es) 2014-08-12
SI2208552T1 (sl) 2011-08-31
DE502009000546D1 (de) 2011-05-26
ATE505278T1 (de) 2011-04-15
SI2208552T2 (sl) 2014-09-30

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