EP1815922A1 - Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement - Google Patents

Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement Download PDF

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Publication number
EP1815922A1
EP1815922A1 EP06090018A EP06090018A EP1815922A1 EP 1815922 A1 EP1815922 A1 EP 1815922A1 EP 06090018 A EP06090018 A EP 06090018A EP 06090018 A EP06090018 A EP 06090018A EP 1815922 A1 EP1815922 A1 EP 1815922A1
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EP
European Patent Office
Prior art keywords
cutting
tool
punch
geometry
workpiece
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.)
Granted
Application number
EP06090018A
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German (de)
French (fr)
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EP1815922B1 (en
Inventor
Willi Dipl.-Ing. Grimm
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.)
Feintool Intellectual Property AG
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Feintool Intellectual Property AG
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.)
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Priority to DK06090018T priority Critical patent/DK1815922T3/en
Application filed by Feintool Intellectual Property AG filed Critical Feintool Intellectual Property AG
Priority to EP06090018A priority patent/EP1815922B1/en
Priority to PT06090018T priority patent/PT1815922E/en
Priority to PL06090018T priority patent/PL1815922T3/en
Priority to ES06090018T priority patent/ES2320372T3/en
Priority to AT06090018T priority patent/ATE420741T1/en
Priority to SI200630216T priority patent/SI1815922T1/en
Priority to DE502006002645T priority patent/DE502006002645D1/en
Priority to CA2640211A priority patent/CA2640211C/en
Priority to JP2008552759A priority patent/JP2009525184A/en
Priority to US12/223,570 priority patent/US10022770B2/en
Priority to PCT/EP2007/001106 priority patent/WO2007090658A1/en
Priority to KR1020087019253A priority patent/KR20080091798A/en
Priority to CN2007800043772A priority patent/CN101378859B/en
Publication of EP1815922A1 publication Critical patent/EP1815922A1/en
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    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/14—Punching tools; Punching dies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
    • Y10T407/245—Cutters, for shaping with chip breaker, guide or deflector comprising concave surface in cutting face of tool

Definitions

  • the invention relates to a method for producing workpieces with small in relation to the cutting thickness corner radii and massively reduced indentation in a fineblanking tool of a fine cutting machine, in which the workpiece between two tool parts from each of an upper and lower cutting plate and an upper and a lower cutting punch is clamped and the cutting takes place in cooperation with the upper and lower cutting dies.
  • the invention further relates to a tool for fine cutting of workpieces with small in relation to the cutting thickness corner radii and massively reduced indentation from a punched strip, a board, a coil material o.
  • a tool for fine cutting of workpieces with small in relation to the cutting thickness corner radii and massively reduced indentation from a punched strip, a board, a coil material o. The like.
  • two latter clamping tool halves which are composed of at least one respective cutting plate and a cutting punch.
  • the ratio of a geometric size describing the cutting lines to the sheet thickness results in the fine-cutting difficulty, which increases with increasing sheet thickness. This means that fineblanking of large-area thin parts is easier than fineblanking narrow webs or rings with large sheet thicknesses. Likewise, obtuse-angled corners with large radii can be better fine-cut than acute-angled ones with small radii.
  • From the DE 39 31 320 C1 is a method for producing burr-free workpieces by punch-counter cutting, For example, in a fine cutting tool, wherein a punching strip from which the workpiece is to be cut, between two tool parts of an upper and a lower cutting plate and an upper and lower cutting punch is clamped and the cutting takes place in cooperation with an upper and lower cutting punch, wherein the workpiece is cut along a cutting line and cut in the opposite direction.
  • this prior art shows the intentional counter-cutting on both sides.
  • Typical features of fine cut parts are edge indentation and cutting degree.
  • corner parties indenting, which increases with decreasing corner radius and increasing sheet thickness.
  • the insertion depth can be approx. 20% and the feed width of 30% of the sheet thickness or more (see DIN 3345, fineblanking, Aug. 1980).
  • This feeder is thus dependent on material thickness and quality, so that its Control is limited and often brings a limitation of the part function, for example, by a lack of sharp edges of the corners in the case of gearing parts or by the caused change in the functional length of the parts, brings with it.
  • the present invention seeks to improve a method and a tool for the manufacture of workpieces so that the fine blanking on parts with small corner radii and sharp corners with larger sheet thickness without Functional restriction of the parts can be applied while ensuring economic benefits.
  • the solution according to the invention is characterized in that fineblanking is also economically applicable to parts of parts with small corner radii and sharp edge regions, for example toothed parts of greater thickness. It is based on the principle of different cutting direction of the part geometry, which converge without corner radius.
  • the part to be cut is therefore composed of at least two cutting geometries, for example a circular geometry and a tooth geometry, wherein the fine-blanking process takes place in a single-stage arrangement.
  • the tip circle of the toothing part is cut out of the punching strip in the vertical working direction. This is followed by the cutting out of the tooth spaces in the first sub-step opposite working direction.
  • the particular advantage of the method according to the invention is the fact that the converging tool geometries are not pressure-loaded simultaneously and not in the same direction.
  • the pressure loads in the corner region of the workpieces can be significantly reduced so that complicated parts geometries can also be produced of greater thickness with sharp edges, massively reduced indentation and precise functional length by fineblanking.
  • the method and tool according to the invention requires only a single-stage arrangement and furthermore makes it possible to minimize the use of multi-stage production processes, as a result of which the fine-blanking process becomes more economical even for complicated parts of greater thickness.
  • FIG. 3 is a simplified schematic representation of the tool according to the invention in the execution of the first substep of the method according to the invention
  • FIG. 5 shows the section of the sectional surface geometry of a toothing part produced by the method according to the invention in an enlarged perspective view.
  • the method according to the invention is intended to produce a workpiece 1, here a toothed part of greater thickness d, for example of 6.5 mm, by fine blanking from a stamped strip 2 .
  • the basic structure of the fineblanking tool 3 corresponds to the known prior art. On a detailed presentation can therefore be omitted. In the following, therefore, only the special features of the tool are highlighted.
  • FIGS. 1 and 2 show those of the prior art DE 39 31 320 C1 Her known cut geometry of a finely cut and a counter-felted part 4 and 5, respectively .
  • the finely cut part 4 has a Kanteneinzugszone 6, a smooth cut zone 7 and a ridge. 8 on, wherein the latter is located on the side facing away from the Kanteneinzugszone 6 side. It can be seen from the sectional geometry of the counter-cut part 5 that a double-sided edge retraction 9 is produced during counter-fine cutting, as a result of which parts with sharp edges, such as gearing parts, can not be manufactured with the necessary dimensional accuracy and accuracy.
  • the single-stage fineblanking tool 3 has - as shown in FIGS. 3, 4 and 5 - a multistage main punch 10 .
  • the strip material 2 to be cut is clamped between a hold-down 11 and a cutting plate 12 . It has the thickness d, here 6.5 mm.
  • the main punch 10, which is designed according to its geometry to be produced to the toothing part 1 , cuts in the first step A a circuit board 13 (semi-finished) with a, adapted to the later teeth 15 head circle 14 of the strip material 2 in the vertical direction.
  • the feeder 16 at the top circle 14 of the board 13 is negligible and is located on the side 17 of the board 13, which is the attacking main punch 10 opposite.
  • the punches 18 for finishing cutting the toothing part 1 in a direction opposite to the partial step A after a working path corresponding to the thickness d of the strip material 2 , the tooth geometries 19 in the with the female part 20th returning board 13 , whereby the resulting waste 21 are discharged.
  • the corner region of the feeder 16 from the partial step A is replenished.
  • the cutting punch of the fineblanking tool 3 is designed as a multi-part main punch 10 for cutting out a first cutting geometry, for example a circuit board 13 .
  • the diameter of the board 13 corresponds to the head diameter of the toothing 15 of the toothing part 1 to be produced.
  • the working direction of the main punch 10 extends vertically.
  • At least one punch 18 (tooth gap punch) for final cutting of the semi-finished product into the toothing part 1 is assigned to the main punch 10 .
  • the punch 18 operates in the opposite direction to the main punch 10 and is located to the first cut geometry that he can detect this and not pressure-loaded in the same direction.
  • the sectional geometry of the main punch 10 is a top circle. However, it may also be a geometry of a composite contour of uniform or uneven curvature if other parts of other more complex shapes are to be cut.
  • the dies 18 for finish cutting expediently have geometries of a contour with a uniform or uneven curvature.
  • the cutting geometries of the main punch 10 and punch 18 can be varied so that complicated parts can be composed of simple geometries.
  • the fineblanking tool 3 is constructed in one stage. It allows opposing and contiguous intersection operations as previously described as substeps A and B.
  • FIG. 5 shows, as an example, a toothing part produced according to the method according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Punching Or Piercing (AREA)
  • Milling Processes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A process for producing workpieces with small corner radii, comprises holding the workpiece between two tool sections composed of upper and lower cutting plates and upper and lower cutting stampers, and then cutting. A semi-manufactured product is cut out in a primary cutting stage, which has the geometry of the work piece. The product is then cut in the opposite direction, to form the final product during a secondary cutting stage. The tool for fine cutting includes a main stamper (10), a final cutting stamper (18), and a cutting plate.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Werkstücken mit im Verhältnis zur schneidenden Dicke kleinen Eckenradien und massiv reduziertem Einzug in einem Feinschneidewerkzeug einer Feinschneidmaschine, bei dem das Werkstück zwischen zwei Werkzeugteilen aus jeweils einer oberen und unteren Schneidplatte sowie einem oberen und einem unteren Schneidstempel eingespannt wird und das Schneiden im Zusammenwirken mit den oberen und unteren Schneidstempeln erfolgt.The invention relates to a method for producing workpieces with small in relation to the cutting thickness corner radii and massively reduced indentation in a fineblanking tool of a fine cutting machine, in which the workpiece between two tool parts from each of an upper and lower cutting plate and an upper and a lower cutting punch is clamped and the cutting takes place in cooperation with the upper and lower cutting dies.

Die Erfindung betrifft ferner ein Werkzeug zum Feinschneiden von Werkstücken mit im Verhältnis zur schneidenden Dicke kleinen Eckenradien und massiv reduziertem Einzug aus einem Stanzstreifen, einer Platine, einem Coilmaterial o. dgl., mit zwei letztere einspannende Werkzeughälften, die zumindest aus jeweils einer Schneidplatte und einem Schneidstempel zusammengesetzt sind.The invention further relates to a tool for fine cutting of workpieces with small in relation to the cutting thickness corner radii and massively reduced indentation from a punched strip, a board, a coil material o. The like., With two latter clamping tool halves, which are composed of at least one respective cutting plate and a cutting punch.

Stand der TechnikState of the art

Die Grenzen des Feinschneidens von Teilepartien mit im Verhältnis zur schneidenden Blechdicke und Materialqualität kleinen Eckenradien sind ausreichend bekannt. Auf Grund von Erfahrungen wird ein Feinschneidschwierigkeitsgrad definiert, der die Schwierigkeitsstufen S1 (leicht), S2 (mittel) und S3 (schwierig) unterscheidet (siehe " Umformen und Feinschneiden" in Handbuch für Verfahren, Werkstoffe, Teilegestaltung, S. 154 bis 165, Verlag Hallwag AG, 1997, Schweiz ). Der Schwierigkeitsgrad wird demzufolge im Wesentlichen durch die Schnittliniengeometrie und die Blechdicke bestimmt. Die Schnittliniengeometrie wird dazu in einfache geometrische Grundformen wie Eckenradien, Lochdurchmesser, Schlitz- und Stegbreiten zerlegt. Aus dem Verhältnis einer die Schnittlinien beschreibenden geometrischen Größe zur Blechdicke ergibt sich der Feinschneidschwierigkeitsgrad, der mit steigender Blechdicke zunimmt.
Das bedeutet, dass das Feinschneiden von großflächigen dünnen Teilen einfacher ist als das Feinschneiden von schmalen Stegen oder Ringen bei großer Blechdicke. Ebenso lassen sich stumpfwinklige Ecken mit großen Radien besser feinschneiden als spitzwinklige mit kleinen Radien.The limits of fine cutting of parts with parts in relation to the cutting sheet thickness and material quality small corner radii are well known. Based on experience, a fine-cutting difficulty level is defined that distinguishes the difficulty levels S1 (easy), S2 (medium) and S3 (difficult) (see " Forming and fineblanking "in Handbuch für Verfahren, Werkstoffe, Teilegestaltung, S. 154 bis 165, Verlag Hallwag AG, 1997, Switzerland ). The degree of difficulty is therefore essentially determined by the cut line geometry and the sheet thickness. For this purpose, the cut line geometry is broken down into simple geometric basic shapes such as corner radii, hole diameters, slot widths and web widths. The ratio of a geometric size describing the cutting lines to the sheet thickness results in the fine-cutting difficulty, which increases with increasing sheet thickness.
This means that fineblanking of large-area thin parts is easier than fineblanking narrow webs or rings with large sheet thicknesses. Likewise, obtuse-angled corners with large radii can be better fine-cut than acute-angled ones with small radii.

Aus der DE 39 31 320 C1 ist ein Verfahren zum Herstellen von gratfreien Werkstücken durch Stanz-Konterschneiden, beispielsweise in einem Feinschneidewerkzeug bekannt, wobei ein Stanzstreifen, aus dem das Werkstück ausgeschnitten werden soll, zwischen zwei Werkzeugteilen aus jeweils einer oberen und einer unteren Schneideplatte sowie einem oberen und unteren Schneidstempel eingeklemmt wird und das Schneiden im Zusammenwirken mit einem oberen und unteren Schneidstempel erfolgt, wobei das Werkstück entlang einer Schnittlinie angeschnitten und in entgegengesetzter Richtung ausgeschnitten wird.
Gerade dieser Stand der Technik zeigt den beim Konterschneiden gewollten beidseitigen Stanzeinzug.From the DE 39 31 320 C1 is a method for producing burr-free workpieces by punch-counter cutting, For example, in a fine cutting tool, wherein a punching strip from which the workpiece is to be cut, between two tool parts of an upper and a lower cutting plate and an upper and lower cutting punch is clamped and the cutting takes place in cooperation with an upper and lower cutting punch, wherein the workpiece is cut along a cutting line and cut in the opposite direction.
Especially this prior art shows the intentional counter-cutting on both sides.

Typische Merkmale von Feinschnittteilen sind Kanteneinzug und Schnittgrad. Insbesondere in Eckenparteien stellt sich Einzug ein, der mit kleiner werdenden Eckenradius und steigender Blechdicke zunimmt. Die Einzugstiefe kann rd. 20% und die Einzugsbreite von 30% der Blechdicke oder mehr betragen (siehe DIN 3345, Feinschneiden, Aug. 1980). Dieser Einzug ist damit abhängig von Materialdicke und -qualität, so dass seine
Steuerung nur begrenzt möglich ist und oft eine Einschränkung der Teilefunktion, beispielsweise durch eine fehlende Scharfkantigkeit der Ecken bei Verzahnungsteilen oder durch die hervorgerufene Änderung der Funktionslänge der Teile, mit sich bringt.Typical features of fine cut parts are edge indentation and cutting degree. In particular, in corner parties indenting, which increases with decreasing corner radius and increasing sheet thickness. The insertion depth can be approx. 20% and the feed width of 30% of the sheet thickness or more (see DIN 3345, fineblanking, Aug. 1980). This feeder is thus dependent on material thickness and quality, so that its
Control is limited and often brings a limitation of the part function, for example, by a lack of sharp edges of the corners in the case of gearing parts or by the caused change in the functional length of the parts, brings with it.

Aufgabenstellungtask

Bei diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und ein Werkzeug zum Herstellen von Werkstücken so zu verbessern, dass das Feinschneiden auch auf Teile mit kleinen Eckenradien und scharfkantigen Ecken bei größerer Blechdicke ohne Funktionseinschränkung der Teile unter gleichzeitiger Gewährleistung wirtschaftlicher Vorteile angewendet werden kann.In this prior art, the present invention seeks to improve a method and a tool for the manufacture of workpieces so that the fine blanking on parts with small corner radii and sharp corners with larger sheet thickness without Functional restriction of the parts can be applied while ensuring economic benefits.

Diese Aufgabe wird durch ein Verfahren der eingangs genannten Gattung mit den kennzeichnenden Merkmalen des Anspruchs 1 und durch ein Werkzeug mit den kennzeichnenden Merkmalen des Anspruchs 5 gelöst.This object is achieved by a method of the type mentioned above with the characterizing features of claim 1 and by a tool having the characterizing features of claim 5.

Vorteilhafte Ausgestaltungen des Verfahrens und des Werkzeugs sind den Unteransprüchen entnehmbar.Advantageous embodiments of the method and the tool are the dependent claims.

Die erfindungsgemäße Lösung zeichnet sich dadurch aus, dass das Feinschneiden auch für Teilepartien mit kleinen Eckradien und scharfen Kantenbereichen, beispielsweise Verzahnungsteile mit größerer Dicke wirtschaftlich anwendbar wird. Sie basiert auf dem Prinzip der unterschiedlichen Schnittrichtung der Teilegeometrie, welche ohne Eckenradius zusammenlaufen.The solution according to the invention is characterized in that fineblanking is also economically applicable to parts of parts with small corner radii and sharp edge regions, for example toothed parts of greater thickness. It is based on the principle of different cutting direction of the part geometry, which converge without corner radius.

Das zu schneidende Teil wird demzufolge aus zumindest zwei Schnittgeometrien zusammengesetzt, beispielsweise einer Kreisgeometrie und einer Zahngeometrie, wobei der Feinschneidprozess in einer einstufigen Anordnung abläuft. In einem ersten Teilschritt wird der Kopfkreis des Verzahnungsteils aus dem Stanzstreifen in vertikaler Arbeitsrichtung ausgeschnitten. Es folgt das Ausschneiden der Zahnlücken in zum ersten Teilschritt entgegengesetzter Arbeitsrichtung.The part to be cut is therefore composed of at least two cutting geometries, for example a circular geometry and a tooth geometry, wherein the fine-blanking process takes place in a single-stage arrangement. In a first partial step, the tip circle of the toothing part is cut out of the punching strip in the vertical working direction. This is followed by the cutting out of the tooth spaces in the first sub-step opposite working direction.

Der besondere Vorteil des erfindungsgemäßen Verfahrens ist darin zu sehen, dass die zusammenlaufenden Werkzeuggeometrien nicht gleichzeitig und nicht in gleicher Richtung druckbelastet werden. Die Druckbelastungen im Eckenbereich der Werkstücke können so signifikant herabgesetzt werden, so dass sich komplizierte Teilegeometrien auch größerer Dicke mit scharfen Kanten, massiv reduziertem Einzug und genauer Funktionslänge durch das Feinschneiden herstellen lassen.The particular advantage of the method according to the invention is the fact that the converging tool geometries are not pressure-loaded simultaneously and not in the same direction. The pressure loads in the corner region of the workpieces can be significantly reduced so that complicated parts geometries can also be produced of greater thickness with sharp edges, massively reduced indentation and precise functional length by fineblanking.

Durch die besondere Wahl der Schnittgeometrie des ersten Teilschritts gelingt es, dass der Einzug beim zweiten Teilschritt wieder aufgefüllt wird.Due to the special choice of the cutting geometry of the first step, it is possible that the indentation is refilled in the second sub-step.

Das erfindungsgemäße Verfahren und Werkzeug benötigt nur eine einstufige Anordnung und ermöglicht es des Weiteren, die Anwendung mehrstufiger Fertigungsprozesse zu minimieren, wodurch der Feinschneidprozess auch für kompliziert zusammengesetzte Teile größerer Dicke wirtschaftlicher wird.The method and tool according to the invention requires only a single-stage arrangement and furthermore makes it possible to minimize the use of multi-stage production processes, as a result of which the fine-blanking process becomes more economical even for complicated parts of greater thickness.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen.Further advantages and details will become apparent from the following description with reference to the accompanying drawings.

Ausführungsbeispielembodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.
Es zeigtThe invention will be explained in more detail below using an exemplary embodiment.
It shows

Fig. 1 und 2 einen teilweise dargestellten Querschnitt feingeschnittener Teile gemäß dem Stand der Technik nach DE 39 31 320 C1 ,1 and 2 a partially illustrated cross-section of finely cut parts according to the prior art according to DE 39 31 320 C1 .

Fig. 3 eine vereinfachte schematische Darstellung des erfindungsgemäßen Werkzeugs bei der Ausführung des ersten Teilschritts des erfindungsgemäßen Verfahrens,3 is a simplified schematic representation of the tool according to the invention in the execution of the first substep of the method according to the invention,

Fig. 4 eine weitere vereinfachte Darstellung des erfindungsgemäßen Verfahrens bei der Ausführung des zweiten Teilschritts des erfindungsgemäßen Verfahrens,4 shows a further simplified representation of the method according to the invention in the execution of the second partial step of the method according to the invention,

Fig. 5 den Ausschnitt der Schnittflächengeometrie eines nach dem erfindungsgemäßen Verfahrens hergestellten Verzahnungsteils in vergrößerter perspektivischer Darstellung.5 shows the section of the sectional surface geometry of a toothing part produced by the method according to the invention in an enlarged perspective view.

Mit dem erfindungsgemäßen Verfahren soll ein Werkstück 1, hier ein Verzahnungsteil größerer Dicke d, beispielsweise von 6,5 mm durch Feinschneiden aus einem Stanzstreifen 2 hergestellt werden. Der grundsätzliche Aufbau des Feinschneidwerkzeuges 3 entspricht dem bekannten Stand der Technik. Auf eine detaillierte Darstellung kann daher verzichtet werden. Im Folgenden werden deshalb nur die Besonderheiten des Werkzeuges hervorgehoben.The method according to the invention is intended to produce a workpiece 1, here a toothed part of greater thickness d, for example of 6.5 mm, by fine blanking from a stamped strip 2 . The basic structure of the fineblanking tool 3 corresponds to the known prior art. On a detailed presentation can therefore be omitted. In the following, therefore, only the special features of the tool are highlighted.

Die Fig. 1 und 2 zeigen die aus dem Stand der Technik nach DE 39 31 320 C1 her bekannte Schnittgeometrie eines feingeschnittenen und eines konterfeingeschnittenen Teils 4 bzw. 5. Das feingeschnittene Teil 4 weist eine Kanteneinzugszone 6, eine Glattschnittzone 7 und einen Grat 8 auf, wobei letzterer auf der der Kanteneinzugszone 6 abgewandten Seite liegt. Aus der Schnittgeometrie des konterfeingeschnittenen Teils 5 ist zu erkennen, dass beim Konterfeinschneiden ein beidseitiger Kanteneinzug 9 entsteht, wodurch Teile mit scharfen Kanten, wie beispielsweise Verzahnungsteile, nicht mit der notwendigen Maßhaltigkeit und Genauigkeit gefertigt werden können.FIGS. 1 and 2 show those of the prior art DE 39 31 320 C1 Her known cut geometry of a finely cut and a counter-felted part 4 and 5, respectively . The finely cut part 4 has a Kanteneinzugszone 6, a smooth cut zone 7 and a ridge. 8 on, wherein the latter is located on the side facing away from the Kanteneinzugszone 6 side. It can be seen from the sectional geometry of the counter-cut part 5 that a double-sided edge retraction 9 is produced during counter-fine cutting, as a result of which parts with sharp edges, such as gearing parts, can not be manufactured with the necessary dimensional accuracy and accuracy.

Das einstufige Feinschneidwerkzeug 3 weist - wie in Fig. 3, 4 und 5 gezeigt- einen mehrstufigen Hauptstempel 10 auf. Das zu schneidende Streifenmaterial 2 liegt zwischen einem Niederhalter 11 und einer Schneidplatte 12 eingespannt fest. Es weist die Dicke d, hier 6,5 mm auf. Der Hauptstempel 10, der in seiner Geometrie auf das zu fertigende Verzahnungsteil 1 entsprechend ausgelegt ist, schneidet im ersten Teilschritt A eine Platine 13 (Halbfabrikat) mit einem, an die spätere Verzahnung 15 angepassten Kopfkreis 14 aus dem Streifenmaterial 2 in vertikaler Arbeitsrichtung aus. Der Einzug 16 am Kopfkreis 14 der Platine 13 ist vernachlässigbar gering und liegt auf der Seite 17 der Platine 13, die dem angreifenden Hauptstempel 10 gegenüber liegt.The single-stage fineblanking tool 3 has - as shown in FIGS. 3, 4 and 5 - a multistage main punch 10 . The strip material 2 to be cut is clamped between a hold-down 11 and a cutting plate 12 . It has the thickness d, here 6.5 mm. The main punch 10, which is designed according to its geometry to be produced to the toothing part 1 , cuts in the first step A a circuit board 13 (semi-finished) with a, adapted to the later teeth 15 head circle 14 of the strip material 2 in the vertical direction. The feeder 16 at the top circle 14 of the board 13 is negligible and is located on the side 17 of the board 13, which is the attacking main punch 10 opposite.

Im folgenden Teilschritt B (siehe Fig. 4) schneiden die Stempel 18 (Zahnlückenstempel) zum Fertigschneiden des Verzahnungsteiles 1 in zum Teilschritt A entgegengesetzter Richtung nach einem Arbeitsweg, der der Dicke d des Streifenmaterials 2 entspricht, die Zahngeometrien 19 in der mit dem Matrizenteil 20 zurücklaufenden Platine 13 aus, wodurch auch die entstehenden Abfallpartien 21 abgeführt werden.In the following sub-step B (see FIG. 4), the punches 18 (tooth gap punches) for finishing cutting the toothing part 1 in a direction opposite to the partial step A after a working path corresponding to the thickness d of the strip material 2 , the tooth geometries 19 in the with the female part 20th returning board 13 , whereby the resulting waste 21 are discharged.

Der Eckenbereich des Einzugs 16 aus dem Teilschritt A wird wieder aufgefüllt.The corner region of the feeder 16 from the partial step A is replenished.

Der Schneidstempel des Feinschneidwerkzeugs 3 ist als ein mehrteiliger Hauptstempel 10 zum Ausschneiden einer ersten Schnittgeometrie, beispielsweise einer Platine 13 ausgelegt. Der Durchmesser der Platine 13 entspricht dem Kopfdurchmesser der Verzahnung 15 des herzustellenden Verzahnungsteils 1. Die Arbeitsrichtung des Hauptstempels 10 verläuft vertikal. Dem Hauptstempel 10 ist zumindest ein Stempel 18 (Zahnlückenstempel) zum Fertigschneiden des Halbfabrikats in das Verzahnungsteil 1 zugeordnet. Der Stempel 18 arbeitet in entgegengesetzter Richtung zum Hauptstempel 10 und ist so zur ersten Schnittgeometrie gelegen, dass er diese erfassen kann und nicht in gleicher Richtung druckbelastet.The cutting punch of the fineblanking tool 3 is designed as a multi-part main punch 10 for cutting out a first cutting geometry, for example a circuit board 13 . The diameter of the board 13 corresponds to the head diameter of the toothing 15 of the toothing part 1 to be produced. The working direction of the main punch 10 extends vertically. At least one punch 18 (tooth gap punch) for final cutting of the semi-finished product into the toothing part 1 is assigned to the main punch 10 . The punch 18 operates in the opposite direction to the main punch 10 and is located to the first cut geometry that he can detect this and not pressure-loaded in the same direction.

Im Falle der Herstellung eines Verzahnungsteils 1 ist die Schnittgeometrie des Hauptstempels 10 ein Kopfkreis. Es kann aber auch eine Geometrie aus einer zusammengesetzten Kontur aus gleichmäßiger oder ungleichmäßiger Krümmung sein, wenn andere Teile anderer komplizierter Formen feingeschnitten werden sollen.In the case of producing a toothing part 1 , the sectional geometry of the main punch 10 is a top circle. However, it may also be a geometry of a composite contour of uniform or uneven curvature if other parts of other more complex shapes are to be cut.

Die Stempel 18 zum Fertigschneiden haben zweckmäßigerweise Geometrien einer Kontur mit einer gleichmäßigen oder ungleichmäßigen Krümmung.The dies 18 for finish cutting expediently have geometries of a contour with a uniform or uneven curvature.

Die Schnittgeometrien von Hauptstempel 10 und Stempel 18 können dabei so variiert werden, dass sich komplizierte Teile aus jeweils einfachen Geometrien zusammensetzen lassen.The cutting geometries of the main punch 10 and punch 18 can be varied so that complicated parts can be composed of simple geometries.

Das Feinschneidwerkzeug 3 ist einstufig aufgebaut. Es erlaubt gegenläufige und direkt aneinandergrenzende Schnittoperationen wie sie zuvor als Teilschritt A und B beschrieben wurden.The fineblanking tool 3 is constructed in one stage. It allows opposing and contiguous intersection operations as previously described as substeps A and B.

Die zusammenlaufenden Werkzeuggeometrien von Hauptstempel 10 und Zahnlückenstempel 18 werden somit nicht gleichzeitig und auch nicht in gleicher Richtung druckbelastet, so dass der ansonsten notwendige Eckenradius zur Reduktion der partiellen Stauchspannungen im Spitzenbereich des Verzahnungsteiles entfallen kann. Die Fig. 5 zeigt als ein Beispiel ein entsprechend nach dem erfindungsgemäßen Verfahren hergestelltes Verzahnungsteil.The converging tool geometries of main punch 10 and tooth gap punch 18 are thus not simultaneously and not pressure-loaded in the same direction, so that the otherwise necessary corner radius for reducing the partial crushing stresses in the tip region of the toothed part can be omitted. FIG. 5 shows, as an example, a toothing part produced according to the method according to the invention.

Dadurch werden komplizierte Werkstücke oder Teile größerer Dicke mit scharfen Kanten und massiv reduziertem Einzug auch mit dem Feinschneiden wirtschaftlich herstellbar.As a result, complicated workpieces or parts of greater thickness with sharp edges and massively reduced indentation can be economically produced even with fineblanking.

BezugszeichenlisteLIST OF REFERENCE NUMBERS Verzahnungsteil, WerkstückGearing part, workpiece 11 Streifenmaterialstrip material 22 FeinscheidwerkzeugFine cutting tool 33 Querschnitt eines feingeschnittenen Teils nach dem Stand der TechnikCross section of a finely cut part according to the prior art 44 Querschnitt eines konterfeingeschnittenen Teils nach dem Stand der TechnikCross-section of a counter-cut part according to the prior art 55 KanteneinzugszoneEdge feed zone 66 GlattschnittzoneSmooth cutting zone 77 Gratridge 88th Beidseitiger KanteneinzugDouble-sided edge feed 99 Hauptstempelmain temple 1010 NiederhalterStripper plate 1111 Schneidplattecutting board 1212 Platine (Halbzeug)Board (semi-finished product) 1313 Kopfkreis von 15Head circle of 15 1414 Verzahnunggearing 1515 Einzug von 13Moving in from 13 1616 Seite von 13Page of 13 1717 Stempel (Zahnlückenstempel)Stamp (tooth gap cancel) 1818 Zahngeometrietooth geometry 1919 Matrizenteilfemale member 2020 Abfallpartiewaste game 2121 Dicke von 2Thickness of 2 dd Teilschrittpartial step AA Teilschrittpartial step BB

Claims (12)

Verfahren zum Herstellen von Werkstücken mit im Verhältnis zur schneidenden Dicke kleinen Eckenradien und massiv reduziertem Einzug durch Feinschneiden in einem Feinschneidewerkzeug einer Feinschneidmaschine, bei dem das Werkstück zwischen zwei Werkzeugteilen aus jeweils einer oberen und unteren Schneidplatte sowie einem oberen und einem unteren Schneidstempel eingespannt wird und das Schneiden im Zusammenwirken mit den oberen und unteren Schneidstempeln erfolgt, dadurch gekennzeichnet, dass das Werkstück in einer einstufigen Anordnung in mindestens zwei zeitlich aufeinander abfolgenden Schnittfolgen (A,B) in unterschiedlichen Schnittrichtungen mit folgenden Teilschritten bearbeitet wird: A) Ausschneiden eines auf die Werkstückgeometrie abgestimmten Halbfabrikats in einem ersten Schneidvorgang in vertikaler Arbeitsrichtung mit einem geringem Einzug, B) Fertigschneiden des nach Schritt (A) hergestellten Halbfabrikats in mindestens einem weiteren Schneidvorgang in zum Schritt (A) entgegengesetzter Arbeitsrichtung, wobei der Einzug des Teilschritts (A) zumindest im Eckbereich wieder aufgefüllt wird. Method for producing workpieces with small corner radii in relation to the cutting thickness and massively reduced insertion by fineblanking in a fineblanking tool of a fineblanking machine, in which the workpiece is clamped between two tool parts each consisting of an upper and lower inserting plate and an upper and a lower punching die; Cutting in cooperation with the upper and lower cutting dies is carried out, characterized in that the workpiece is processed in a single-stage arrangement in at least two temporally successive cutting sequences (A, B) in different cutting directions with the following sub-steps: A) cutting a semi-finished product matched to the workpiece geometry in a first cutting operation in the vertical working direction with a small feed, B) Finishing of the semi-finished product produced according to step (A) in at least one further cutting operation in opposite direction to step (A) , wherein the collection of the partial step (A) is replenished at least in the corner. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die zusammenlaufenden Werkzeuggeometrien (Schneidstempel) für den Teilschritt (A) und (B) nicht gleichzeitig und nicht in gleicher Richtung druckbelastet werden.A method according to claim 1, characterized in that the converging tool geometries (cutting punch) for the sub-step (A) and (B) are not simultaneously and not in the same direction pressure-loaded. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Werkzeuggeometrie für die Teilschritte (A) und (B) so aufgeteilt wird, dass die Druckbelastungen im Eckbereich des Werkstücks reduziert werden.A method according to claim 1 and 2, characterized in that the tool geometry for the sub-steps (A) and (B) is divided so that the pressure loads in the corner region of the workpiece are reduced. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass die Schnittgeometrie des Teilschritts (A) so auf die Schnittgeometrie des Teilschritts (B) abgestimmt wird, dass sich der Einzug der Teilschritts (A) im Eckenbereich auffüllt und das Werkstück keine Funktionslänge verliert.A method according to claim 1 to 3, characterized in that the cutting geometry of the sub-step (A) is matched to the cutting geometry of the sub-step (B) that fills the indentation of the sub-step (A) in the corner region and the workpiece loses no functional length. Werkzeug zum Feinschneiden von Werkstücken mit im Verhältnis zur schneidenden Dicke kleinen Eckenradien und massiv reduziertem Einzug aus einem Stanzstreifen, einer Platine, einem Coilmaterial o. dgl., mit zwei letztere einspannende Werkzeughälften, die zumindest aus jeweils einer Schneidplatte und einem Schneidstempel zusammengesetzt sind, dadurch gekennnzeichnet, dass der Schneidstempel als ein zum Ausschneiden einer ersten Schnittgeometrie eines Halbfabrikats (13) vorgesehener mehrteiliger Hauptstempel (10) ausgebildet ist, dem zumindest ein in vertikaler Arbeitsrichtung zum Hauptstempel wirkender Stempel (18) zum Fertigschneiden des Halbfabrikats zugeordnet ist, wobei der Stempel (18) so zur ersten Schnittgeometrie angeordnet ist, dass er diese erfasst und nicht in gleicher Richtung druckbelastet.Tool for fine cutting of workpieces with in relation to the cutting thickness small corner radii and massively reduced indentation of a punched strip, a board, a coil material o. The like., With two latter clamping tool halves, which are composed of at least one respective cutting plate and a cutting punch, characterized in that the cutting punch is designed as a multi-part main punch ( 10 ) provided for cutting out a first cut geometry of a semi-finished product (13) , to which at least one punch (18) acting in the vertical direction of the main punch is assigned for finish-cutting the semi-finished product, wherein the punch ( 18) is arranged so as to the first cutting geometry that he recorded this and not pressure-loaded in the same direction. Werkzeug nach Anspruch 5, dadurch gekennzeichnet, dass die Schnittgeometrien der Hauptstempel (10) solche eines Kopfkreises, einer Kontur mit einer gleichmäßigen oder ungleichmäßigen Krümmung, einer Geraden oder einer zusammengesetzten Geraden sind.Tool according to claim 5, characterized in that the cutting geometries of the main punches (10) are those of a top circle, a contour with a uniform or irregular curvature, a straight line or a composite straight line. Werkzeug nach Anspruch 5, dadurch gekennzeichnet, dass die Schnittgeometrien der Stempel (18) zum Fertigschneiden solche einer Kontur mit einer gleichmäßigen oder ungleichmäßigen Krümmung, einer Geraden oder einer zusammengesetzten Geraden sind.Tool according to claim 5, characterized in that the cutting geometries of the punch (18) for finish cutting are those of a contour with a uniform or irregular curvature, a straight line or a composite straight line. Werkzeug nach Anspruch 5 bis 7, dadurch gekennzeichnet, dass der Hauptstempel (10) und der Stempel (18) zum Fertigschneiden nicht gleichzeitig und nicht in gleicher Richtung druckbelastet sind.Tool according to claim 5 to 7, characterized in that the main punch (10) and the punch (18) for finish cutting are not simultaneously and not in the same direction pressure-loaded. Werkzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Werkzeuggeometrie von Hauptstempel (10) und Stempel (18) zum Fertigschneiden so aufeinander abgestimmt sind, dass die Druckbelastung im Eckbereich des feingeschnittenen Werkstücks massiv reduziert ist.Tool according to claim 7, characterized in that the tool geometry of the main punch (10) and punch (18) for finishing cutting are coordinated so that the pressure load in the corner of the finely cut workpiece is massively reduced. Werkzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Werkzeuggeometrie von Hauptstempel (10) und Stempel (18) zum Fertigschneiden so aufeinander abgestimmt sind, dass sich ein Einzug im Eckenbereich der Werkstücks wieder auffüllt und das Werkstück keine Funktionslänge verliert.Tool according to claim 7, characterized in that the tool geometry of the main punch (10) and punch (18) for finishing cutting are coordinated so that an indentation in the corner region of the workpiece refills and the workpiece loses no functional length. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, dass es einstufig ausgebildet ist.Tool according to claim 1, characterized in that it is designed in one stage. Werkzeug nach Anspruch 1 und 11, dadurch gekennzeichnet, dass die einstufige Anordnung gegenläufige und direkt aneinandergrenzende Schnittoperationen (A, B) erlauben.Tool according to claim 1 and 11, characterized in that the single-stage arrangement allow opposing and directly adjacent cutting operations ( A, B ).
EP06090018A 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement Active EP1815922B1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
EP06090018A EP1815922B1 (en) 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement
PT06090018T PT1815922E (en) 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement
PL06090018T PL1815922T3 (en) 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement
ES06090018T ES2320372T3 (en) 2006-02-03 2006-02-03 METHOD AND TOOL FOR THE PRECISION OF WORK PARTS CUTTING WITH SMALL CORNER RADIOS AND STRONGLY REDUCED REMOVAL IN A SINGLE STAGE CONFIGURATION.
AT06090018T ATE420741T1 (en) 2006-02-03 2006-02-03 METHOD AND TOOL FOR FINE BLANKING OF WORKPIECES WITH SMALL CORNER RADII AND MASSIVELY REDUCED FEED IN A ONE-STAGE ARRANGEMENT
SI200630216T SI1815922T1 (en) 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement
DE502006002645T DE502006002645D1 (en) 2006-02-03 2006-02-03 Method and tool for fineblanking of workpieces with small corner radii and massively reduced indentation in a one-step arrangement
DK06090018T DK1815922T3 (en) 2006-02-03 2006-02-03 Process and tool for fine-cutting workpieces with small edge radii and greatly reduced depth in a one-stage arrangement
CA2640211A CA2640211C (en) 2006-02-03 2007-02-02 Method and tool for fine blanking of workpieces with small corner radii and greatly reduced draw-in a one-stage arrangement
JP2008552759A JP2009525184A (en) 2006-02-03 2007-02-02 Precision punching method and apparatus for a member in a single-stage facility having sharp edges and reduced dripping
US12/223,570 US10022770B2 (en) 2006-02-03 2007-02-02 Method and tool for precision cutting
PCT/EP2007/001106 WO2007090658A1 (en) 2006-02-03 2007-02-02 Method and tool for the precision cutting of workpieces with small corner radii and greatly reduced draw-in in a one-stage arrangement
KR1020087019253A KR20080091798A (en) 2006-02-03 2007-02-02 Method and tool for the precision cutting of workpieces with small corner radii and greatly reduced draw-in in a one-stage arrangement
CN2007800043772A CN101378859B (en) 2006-02-03 2007-02-02 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement

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EP06090018A EP1815922B1 (en) 2006-02-03 2006-02-03 Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement

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EP1815922A1 true EP1815922A1 (en) 2007-08-08
EP1815922B1 EP1815922B1 (en) 2009-01-14

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EP (1) EP1815922B1 (en)
JP (1) JP2009525184A (en)
KR (1) KR20080091798A (en)
CN (1) CN101378859B (en)
AT (1) ATE420741T1 (en)
CA (1) CA2640211C (en)
DE (1) DE502006002645D1 (en)
DK (1) DK1815922T3 (en)
ES (1) ES2320372T3 (en)
PL (1) PL1815922T3 (en)
PT (1) PT1815922E (en)
SI (1) SI1815922T1 (en)
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10022770B2 (en) 2006-02-03 2018-07-17 Feintool International Holding Ag Method and tool for precision cutting
EP2036631A1 (en) * 2007-09-14 2009-03-18 Feintool Intellectual Property AG Method and device for manufacturing stamping parts with a larger functional area
US9027379B2 (en) 2007-09-14 2015-05-12 Feintool Intellectual Property Ag Method and device for the production of a stamping with enlarged functional surface
CN101396707B (en) * 2007-09-26 2013-03-20 法因图尔知识产权股份公司 Method and device for manufacturing stamping parts with a largely smooth cutting plane and larger functional area
US8939003B2 (en) 2007-09-26 2015-01-27 Feintool Intellectual Property Ag Method and device for the production of a stamping with almost smooth cutting and enlarged functional surface
EP2233771A3 (en) * 2009-03-24 2010-12-01 Robert Bosch GmbH Pusher for a vehicle damper and accompanying vehicle damper
US8826540B2 (en) 2010-02-10 2014-09-09 Feintool Intellectual Property Ag Method and device for influencing the cut and functional face on fine-blanked finished parts
EP2508274A1 (en) 2011-04-05 2012-10-10 Feintool Intellectual Property AG Method and device for increasing the bearing area of a fine blanked workpiece with a tooth, a tooth section or the like

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CA2640211C (en) 2016-11-29
KR20080091798A (en) 2008-10-14
PL1815922T3 (en) 2009-08-31
DE502006002645D1 (en) 2009-03-05
JP2009525184A (en) 2009-07-09
PT1815922E (en) 2009-03-12
CN101378859A (en) 2009-03-04
WO2007090658A1 (en) 2007-08-16
SI1815922T1 (en) 2009-06-30
ES2320372T3 (en) 2009-05-21
ATE420741T1 (en) 2009-01-15
CA2640211A1 (en) 2007-08-16
EP1815922B1 (en) 2009-01-14
DK1815922T3 (en) 2009-05-11
US10022770B2 (en) 2018-07-17
CN101378859B (en) 2012-05-30
US20090010723A1 (en) 2009-01-08

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