EP1815922B1 - 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
EP1815922B1
EP1815922B1 EP06090018A EP06090018A EP1815922B1 EP 1815922 B1 EP1815922 B1 EP 1815922B1 EP 06090018 A EP06090018 A EP 06090018A EP 06090018 A EP06090018 A EP 06090018A EP 1815922 B1 EP1815922 B1 EP 1815922B1
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EP
European Patent Office
Prior art keywords
cutting
tool
punch
cut
workpiece
Prior art date
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EP06090018A
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German (de)
French (fr)
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EP1815922A1 (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
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Priority to DE502006002645T priority Critical patent/DE502006002645D1/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 DK06090018T priority patent/DK1815922T3/en
Priority to AT06090018T priority patent/ATE420741T1/en
Priority to ES06090018T priority patent/ES2320372T3/en
Priority to SI200630216T priority patent/SI1815922T1/en
Priority to PL06090018T priority patent/PL1815922T3/en
Priority to US12/223,570 priority patent/US10022770B2/en
Priority to CN2007800043772A priority patent/CN101378859B/en
Priority to CA2640211A priority patent/CA2640211C/en
Priority to JP2008552759A priority patent/JP2009525184A/en
Priority to KR1020087019253A priority patent/KR20080091798A/en
Priority to PCT/EP2007/001106 priority patent/WO2007090658A1/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 fine cutting 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.
  • CH 665 367 A5 concerns a method for burring off an edge indentation formed on the cut surface of a finely cut part and a burr opposite the edge indentation, which burring is performed in at least one step in a single operation involving the fineblanking operation so that a finished part is obtained per operation.
  • 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 so significantly reduced, so that complicated parts geometries can also be made 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. 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 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 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 the section of the cut 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.
  • the Fig. 1 and 2 show those of the prior art after DE 39 31 320 C1 Her known cutting 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 cutting zone 7 and a ridge. 8 on, wherein the latter is located on the side facing away from the Kanteneinzugszone 6 side.
  • 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 in Fig. 3 . 4 and 5 shown a multi-level main stamp 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 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)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Moulds For Moulding Plastics Or The Like (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 fine cutting 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.

CH 665 367 A5 betrifft ein Verfahren zum Abgraten eines an der Schnittfläche eines feingeschnittenen Teils entstandenen Kanteneinzuges und eines dem Kanteneinzug gegenüberliegenden Grates, welches Abgraten in mindestens einer Stufe in einer einzigen, den Feinschneidenvorgang einschliessenden Operation ausgeführt wird, so dass pro Operation ein fertiger Teil anfällt. CH 665 367 A5 concerns a method for burring off an edge indentation formed on the cut surface of a finely cut part and a burr opposite the edge indentation, which burring is performed in at least one step in a single operation involving the fineblanking operation so that a finished part is obtained per operation.

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 so significantly reduced, so that complicated parts geometries can also be made 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 , Fig. 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, Fig. 3 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, Fig. 4 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. Fig. 5 the section of the cut 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.The Fig. 1 and 2 show those of the prior art after DE 39 31 320 C1 Her known cutting 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 cutting 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 in Fig. 3 . 4 and 5 shown a multi-level main stamp 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 ) cut the punch 18 (tooth gap stamp) for finishing cutting of the toothing part 1 in the opposite direction A to A working path corresponding to the thickness d of the strip material 2 , the tooth geometries 19 in the back with the female part 20 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. The 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. Bezugszeichenliste Verzahnungsteil, Werkstück 1 Streifenmaterial 2 Feinscheidwerkzeug 3 Querschnitt eines feingeschnittenen Teils nach dem Stand der Technik 4 Querschnitt eines konterfeingeschnittenen Teils nach dem Stand der Technik 5 Kanteneinzugszone 6 Glattschnittzone 7 Grat 8 Beidseitiger Kanteneinzug 9 Hauptstempel 10 Niederhalter 11 Schneidplatte 12 Platine (Halbzeug) 13 Kopfkreis von 15 14 Verzahnung 15 Einzug von 13 16 Seite von 13 17 Stempel (Zahnlückenstempel) 18 Zahngeometrie 19 Matrizenteil 20 Abfallpartie 21 Dicke von 2 d Teilschritt A Teilschritt B As a result, complicated workpieces or parts of greater thickness with sharp edges and massively reduced indentation can be economically produced even with fineblanking. LIST OF REFERENCE NUMBERS Gearing part, workpiece 1 strip material 2 Fine cutting tool 3 Cross section of a finely cut part according to the prior art 4 Cross-section of a counter-cut part according to the prior art 5 Edge feed zone 6 Smooth cutting zone 7 ridge 8th Double-sided edge feed 9 main temple 10 Stripper plate 11 cutting board 12 Board (semi-finished product) 13 Head circle of 15 14 gearing 15 Moving in from 13 16 Page of 13 17 Stamp (tooth gap cancel) 18 tooth geometry 19 female member 20 waste game 21 Thickness of 2 d partial step A partial step B

Claims (11)

  1. Method for manufacturing workpieces with small corner radii in relation to the thickness to be cut and reduced edge reduction by fine blanking in a fine blanking tool of a fine blanking machine, wherein the workpiece is clamped between to tool parts respectively consisting of an upper and a lower cutting punch and the cutting is realized by the combined effort of upper and lower cutting punches, characterized in that the workpiece is shaped in a one-stage arrangement in at least two chronologically successive cutting steps (A,B) in different cutting directions in a stage comprising the following partial steps:
    A) Cutting out a semi-finished product corresponding to the geometry of the workpiece in a first cutting process in vertical working direction,
    B) Final cutting of the semi-finished product fabricated according to step (A) in at least one further cutting process in a working direction opposite to that of step (A), wherein the rollover of the partial step (A) at least in the corner area is filled up again.
  2. Method according to claim 1, characterized in that the converging tool geometries (cutting punches) for the partial steps (A) and (B) are not pressure loaded at the same time and not in the same direction.
  3. Method according to claim 1 and 2, characterized in that the pressure load is reached by the partition of the tool geometries for the partial steps (A) and (B) in the corner area of the workpiece.
  4. Method according to claims 1 to 3, characterized in that the cutting geometry of partial step (A) is adjusted to the cutting geometry of partial step (B) for filling up of the rollover in the corner area.
  5. Tool for fine blanking of workpieces with small corner radii in relation to the thickness to be cut and reduced edge reduction from a cutting strip, a sheet a coil material or the like, with two clamping the latter tool halves respectively consisting of at least one cutting die and one cutting punch, characterized in that the cutting punch is designed as a multi-part main punch (10) designated to cut out a first cutting geometry of a semi-finished product (13), which is allocated at least one punch (18) for the final cut of the semi-finished product acting in vertical working direction with respect to the main punch in a one stage arrangement, wherein the punch (18) is arranged with respect to the first cutting geometry in a way that it can be applied to it without applying the pressure load in the same direction.
  6. Tool according to claim 5, characterized in that the cutting geometries of the main punches (10) are such as an addendum circle, a contour with a steady or unsteady curve, a straight line or an assembled straight line.
  7. Tool according to claim 5, characterized in that the cutting geometries of the punches (10) for final cutting are such as a contour with a steady or unsteady curve, a straight line or an assembled straight line.
  8. Tool according to claims 5 to 7, characterized in that the main punch (10) and the punch (18) for the final cut are not exposed to pressure at the same time and not in the same direction.
  9. Tool according to claim 7, characterized in that the tool geometries of main punch (10) and punch (18) for final cutting are adjusted to each other for pressure load in the corner area of the fine blanked workpiece.
  10. Tool according to claim 7, characterized in that the tool geometries of main punch (10) and punch (18) for final cutting are adjusted to each other for filling up of the rollover in the corner area of the workpiece.
  11. Tool according to claim 5, characterized in that the single-step setup facilitates contradirectional and directly adjoining 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
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
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
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.
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
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
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
US12/223,570 US10022770B2 (en) 2006-02-03 2007-02-02 Method and tool for precision cutting
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
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
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
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

Applications Claiming Priority (1)

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

Publications (2)

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

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EP06090018A Active 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

Country Status (14)

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US (1) US10022770B2 (en)
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)
WO (1) WO2007090658A1 (en)

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ES2320372T3 (en) 2009-05-21
KR20080091798A (en) 2008-10-14
CA2640211A1 (en) 2007-08-16
DK1815922T3 (en) 2009-05-11
PT1815922E (en) 2009-03-12
WO2007090658A1 (en) 2007-08-16
CN101378859B (en) 2012-05-30
JP2009525184A (en) 2009-07-09
SI1815922T1 (en) 2009-06-30
EP1815922A1 (en) 2007-08-08
PL1815922T3 (en) 2009-08-31
ATE420741T1 (en) 2009-01-15
CN101378859A (en) 2009-03-04
US10022770B2 (en) 2018-07-17
DE502006002645D1 (en) 2009-03-05
CA2640211C (en) 2016-11-29
US20090010723A1 (en) 2009-01-08

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