EP1212155B1 - Device and method for forming a recess in a workpiece - Google Patents

Device and method for forming a recess in a workpiece Download PDF

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Publication number
EP1212155B1
EP1212155B1 EP00954644A EP00954644A EP1212155B1 EP 1212155 B1 EP1212155 B1 EP 1212155B1 EP 00954644 A EP00954644 A EP 00954644A EP 00954644 A EP00954644 A EP 00954644A EP 1212155 B1 EP1212155 B1 EP 1212155B1
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EP
European Patent Office
Prior art keywords
tool
working
feed
force
workpiece
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP00954644A
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German (de)
French (fr)
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EP1212155A1 (en
Inventor
Eckard Morlock
Philipp Grupp
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Felss GmbH
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Felss GmbH
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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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing

Definitions

  • the invention relates to a device for introducing a depression into a Workpiece that is movable in a feed direction by a feed device Has tool, the at least one processing element for Production of the recess acts on the workpiece, as well as a corresponding Method.
  • the tool has at least one machining element with a machining area has, which is wedge-shaped in the feed direction of the tool is and starting from a front end to the opposite End of the machining area widened to a width that essentially corresponds to the axial extent of the depression to be produced, and itself rising from the base of the tool to a height of at least the depth of the recess to be made, and that the device has a device through which the tool in one of the feed direction different machining direction with a varying machining force is acted upon.
  • a device for insertion a recess in a workpiece in which an acting on the workpiece Tool moved by a feed device in a feed direction is, and in which at least one processing element of the tool for Production of a recess acting on the workpiece is according to the invention
  • the tool used at least one machining element with a machining area that is in the feed direction of the tool is wedge-shaped and extends from a front end to one opposite end of the machining area widened to a width
  • the essentially the axial extent of the recess to be produced extends and extends from the base of the tool to a Elevation that is at least the depth of the recess to be produced, and that the tool in a different direction from the feed direction with a varying machining force.
  • FIG. 1 to 3 show a schematically shown, generally designated 1 Device for making depressions 2a-2d (see FIG. 4) in a workpiece 3a-3e.
  • the device 1 has a tensioning device 10, in the workpieces 3a-3e can be clamped and thereby in the clamping device 10 are held in a fixed position.
  • the clamping device 10 is from a feed device 11 movable in the directions of the double arrow X, so that to the Beund Unload the tensioning device 10 from its working position shown in FIG. 1 away and can be moved back to the working position after the loading process is.
  • the feed device 11 of the clamping device 10 is preferably trained as hydraulic or pneumatic or motorized, a piston 12 of the feed device 11 on the clamping device 10 attacks. By feeding a working medium under pressure into a Piston chamber 13 is thus a back and forth movement of the tensioning device 10 feasible.
  • the clamping device 10 is opposite a pressing device 20, which also from a feed device 21 - as described further below is - is movable in the direction of the double arrow X '.
  • a piston 22 of the feed device 21 engages on the pressing device 20, wherein the piston 22 in turn by supplying a working medium is reciprocable in a piston chamber 23 of the feed device 21.
  • a tool 30 can be inserted by a feed device 31, which in turn has a has pistons 32 guided in a piston chamber 33. That in a tour 25 the pressing device 20 guided tool 30 - as best shown in the figure 3 shows - a number of processing elements 35a-35d, the Number of processing elements 35a-35d on the number of depressions 2a-2d is coordinated, which is to be formed in each of the workpieces 3a-3e.
  • each processing element 35a-35d is wedge-shaped, whereby a wedge-shaped front part 37 of the processing elements 35a-35d of one sharp tip 38 starting from the end 39 of the machining area 40 widened, the width b of the wedge-shaped processing region 40 at its End 39 substantially equal to the axial extent l of the corresponding one Well 2a-2d.
  • the tensioning device 10 is first of all assigned to it Feed device 11 moved out of its working position shown in FIG. 1, so that the workpieces 3a-3e in corresponding receptacles 10a-10e Clamping device 10 can be used. Then the tensioning device 10 moved back into their working position. The one assigned to tool 30 Feed device 31 then moves tool 30 along the guide 25 of the pressing device 20 in the space between the clamping device 10 and the pressing device 20.
  • a tip 38 of the first machining element 35a of the tool 30 touches down on the foremost workpiece 3a in the feed direction, that is Tool 30 with an oscillating one acting in a machining direction B.
  • Machining force applied by the pressing device 20 by its associated Feed device 21 is moved back and forth accordingly.
  • This Force is preferably applied such that the tool 30 acting essentially orthogonally, preferably periodically oscillating Machining force between a maximum value and a minimum value varies, with the minimum value being in the range of zero, or even one takes a negative value, d. that is, the pressing device 20 at this time in a reverse stroke the tool 30 from the workpieces 3a-3e moved away.
  • the individual processing elements 35a-35e of the tool 30 are arranged offset in the feed direction are.
  • This measure has the advantage that the manufacture of individual Indentations 2a-2d in a workpiece 3a-3e occur at different times, whereby in advantageous manner to be applied by the feed device 31 Feed force is reduced.
  • Another feed movement of the tool 30 entails that thereafter the front region 37 following the tip 38 of the first machining element 35a, the wall 3a 'of the tubular workpiece 3a applied, which successively the production of the first recess takes place in workpiece 3a.
  • the tip 38 of the second processing element acts 35b onto the wall of the first workpiece 3a, thereby successively the second depression 2b is carried out in the workpiece 3a.
  • the processing elements 35c, 35d fashion the third and the fourth recess 2c, 2d is produced in the first workpiece 3a, whereby - as already mentioned above - in the feed movement of the tool 30 by their Feed device 31 a by the pressing device 20, Hammer-like force application of the tool 30 and thus its processing elements 35a-35d.
  • the arrangement of the processing elements 35a-35d offset in the feed direction hereby requires that its rear, adjoining the actual processing area 40, itself from the end 39 of the machining area 40 to the end 35a'-35d 'of the machining element 35a-35d extending region 41 such is designed so that the feed movement of the tool 30 is not hinders when the machining area 40 of the machining elements 35a-35d has already passed through the recess 2a-2d in the workpiece 3a-3e, d. H., the rear area 41 of each processing area 40 is designed in such a way that it passes through the recess through the machining area 40 of the machining element 35a-35d was generated, can be pushed through.
  • FIG. 4 shows an essentially rectangular depression 2b, the machining area 40 being shaped as shown in FIG. 4 is.
  • FIG. 4 shows an essentially sawtooth shape Indentation 2a, such as that used as a locking element in headrests for motor vehicles is used.
  • a locking slope extending to the axial direction of the workpiece 3 2a 'goes in a substantially orthogonal to the longitudinal direction of the workpiece 3 extending locking surface 2a ".
  • the processing area 40 of the processing element 35 formed such that the Machining area 40 in plan view and side view the shape of a rectangular Triangle.
  • the wedge-shaped processing area 40 has recesses 43 on its surface, which are preferably alternating are arranged. This measure has the effect that this results in the area the recesses 43 have no effect on the machined workpiece 3, which has the effect that the application of force and thus the action through the processing element 35 on the opposite of the recess 43 Side is increased.
  • the machining elements 35a-35d on the workpiece 3a-3e essentially act orthogonally.
  • the processing elements 35a-35d arranged on the base of the workpiece 3a-3e in such a way are that they are at a defined angle to the orthogonal to this workpiece 3a-3e. This then makes it possible for undercuts can be generated in the depressions 2a-2d.
  • the device described is particularly suitable for producing a Gearing in a tubular workpiece, especially a thin-walled one Workpiece.
  • arranging a corresponding number of processing elements 35a-35d in the tool 30 is by an appropriate spacing of these processing elements 35a-35d particularly easily possible Gearing or at least a portion of this gearing as above described.
  • the device 1 is a feed device (not shown), through which the workpiece (s) 3a-3e in their axial direction after the machining operation by the tool 30 has ended, can be pushed forward.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Forging (AREA)
  • Jigs For Machine Tools (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The invention relates to a device for creating a recess in a workpiece which has a tool (30) which can be moved forward by a forward feed device (31) in a tool (30) which can be moved forward and which has at least one machining element (35; 35a-35d) for the production of a recess (2a-2d) in said workpiece (3a-3e). According to the invention, the tool (30) has at least one machining element (35; 35a-35d) with a machining area (40) which is wedge-shaped and which projects from a front end (38) to an opposite end (39) of the machining area (40) and widens to a breadth (b) thereby substantially corresponding to the axial elongation (I) of the recess to be produced (2a-2d), rising from the base (36) of the tool (30) to a height (h) and having at least the depth (t) of the recess (2a-2d) to be produced. Said device (1) has an apparatus (10, 11; 20, 21) which can move the tool (30) in a processing direction (B) at various machining forces.

Description

Die Erfindung betrifft eine Vorrichtung zum Einbringen einer Vertiefung in ein Werkstück, die ein von einer Vorschubeinrichtung in einer Vorschubrichtung bewegbares Werkzeug aufweist, dessen mindestens ein Bearbeitungselement zur Herstellung der Vertiefung auf das Werkstück einwirkt, sowie ein entsprechendes Verfahren.The invention relates to a device for introducing a depression into a Workpiece that is movable in a feed direction by a feed device Has tool, the at least one processing element for Production of the recess acts on the workpiece, as well as a corresponding Method.

Aus der DE-PS 197 42 820 der Anmelderin ist es bekannt, in ein rohrförmiges Werkstück einen Domeinsatz zum Stützen des umzuformenden Werkstücks beim Umformvorgang einzubringen, wobei der Grundkörper des Domeinsatzes eine sich in axialer Richtung über eine definierte Länge und in azimutaler Richtung über einen definierten Umfangswinkel des Grundkörpers erstreckende und eine definierte Tiefe aufweisende Vertiefung zur Erzeugung einer sich in axialer Richtung über eine definierte Länge und in azimutaler Richtung über einen definierten Umfangswinkel des rohrförmigen Werkstücks erstreckenden, nicht-umlaufenden, nutartigen Vertiefung aufweist. Hierdurch ist es möglich, in ein rohrförmiges Werkstück eine nicht-umlaufende Vertiefung einzubringen, wie es z. B. dann erforderlich ist, wenn in ein Rohr einer Kopfstützenhalterung an dessen Rückseite Rastnuten eingebracht werden sollen. Die Verwendung eines Domensatzes liefert zwar für eine Vielzahl von Anwendungsfällen zumindest zufriedenstellende Resultate. Jedoch kann es hierbei - insbesondere bei dünnwandigen rohrförmigen Werkstücken - dazu kommen, daß ein Einriß und somit eine Beschädigung des Rohres auftritt, welche durch die Einwirkung der die Außenfläche des rohrförmigen Werkstücks beaufschlagenden Umformwerkzeuge hervorgerufen wird.From DE-PS 197 42 820 of the applicant, it is known in a tubular Workpiece a dome insert to support the workpiece to be formed Introducing the forming process, the base body of the dome insert a itself in the axial direction over a defined length and in the azimuthal direction extending over a defined circumferential angle of the base body and one Defined depth to create an axially extending over a defined length and in azimuthal direction over a defined Circumferential angle of the tubular workpiece extending, non-rotating, has groove-like depression. This makes it possible to put in a tubular Workpiece to introduce a non-circumferential recess, as z. B. then required is when in a tube of a headrest bracket on the back Locking grooves should be introduced. The use of a dome set delivers at least satisfactory for a large number of applications Results. However, it can - especially with thin-walled tubular Workpieces - there is also a tear and thus damage of the tube, which occurs due to the action of the outer surface of the tubular Forming tools acting on the workpiece.

Aus der US 21 71 371, die als nachstliegendes Stand des Technik anzusehen ist, ist eine Vorrichtung zum Einbringen einer Vertiefung in ein Werkstück bekannt, welche ein von einer Vorschubeinrichtung in einer Vorschubrichtung bewegbares Werkzeug aufweist, dessen mindestens ein Bearbeitungselement zur Herstellung der Vertiefung auf das Werkstück einwirkt. Das Bearbeitungselement weist eine ovale Zentralöffnung auf, von der in Vorschubrichtung zwei diametral gegenüberliegend angeordnete U-förmige Ausnehmungen ausgehen, wobei diese beiden U-förmigen Ausnehmungen von einer keilförmigen Schneidekante begrenzt werden. Um nun eine Sicke in dem zu bearbeitenden Werkstück herzustellen, wird das Werkstück in die zentrale Öffnung des Bearbeitungswerkzeugs eingeführt und danach das Bearbeitungswerkzeug in Vorschubrichtung vorgeschoben. Die durch diese Vorschubbewegung dann das Werkstück beaufschlagende U-förmige Vertiefung bewirkt die Ausbildung eines ersten, halbrunden Teils der Sicke. Danach wird das Werkzeug entgegen der vorherigen Vorschubrichtung bewegt und die zweite U-förmige Vertiefung bewirkt dann die Ausbildung des zweiten Teils der umlaufenden Sicke. From US 21 71 371, which is to be regarded as the subsequent state of the art, there is a device for introducing a depression into one Workpiece known, which is a feed device in a feed direction Movable tool having at least one processing element acts on the workpiece to produce the recess. The editing element has an oval central opening from which in the feed direction two diametrically opposed U-shaped recesses go out, these two U-shaped recesses from a wedge-shaped Cutting edge can be limited. To now have a bead in the one to be machined To manufacture the workpiece, the workpiece is placed in the central opening of the machining tool introduced and then the processing tool in the feed direction advanced. The through this feed movement then that U-shaped recess acting on the workpiece causes the formation of a first, semicircular part of the bead. Then the tool is counter to the previous feed direction is moved and the second U-shaped recess causes then the formation of the second part of the surrounding bead.

Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung der eingangs genannten Art derart weiterzubilden, daß in einfacher Art und Weise auch in rohrförmige Werkstücke mit einer geringeren Wandstärke Vertiefungen einbringbar sind, sowie ein entsprechendes Verfahren.It is an object of the present invention, a device of the aforementioned Art in such a way that in a simple manner in tubular Workpieces with a smaller wall thickness can be recessed are, as well as a corresponding procedure.

Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art dadurch gelöst, daß das Werkzeug mindestens ein Bearbeitungselement mit einem Bearbeitungsbereich besitzt, der in Vorschubrichtung des Werkzeugs keilförmig ausgestaltet ist und sich von einem vorderen Ende ausgehend zum gegenüberliegenden Ende des Bearbeitungsbereichs auf eine Breite verbreitert, die im wesentlichen der axialen Erstreckung der herzustellenden Vertiefung entspricht, und sich von der Grundfläche des Werkzeugs ausgehend auf eine Höhe erhebt, die mindestens die Tiefe der herzustellenden Vertiefung beträgt, und daß die Vorrichtung eine Einrichtung aufweist, durch die das Werkzeug in einer von der Vorschubrichtung unterschiedlichen Bearbeitungsrichtung mit einer variierenden Bearbeitungskraft beaufschlagbar ist.This task will solved in a device of the type mentioned above, that the tool has at least one machining element with a machining area has, which is wedge-shaped in the feed direction of the tool is and starting from a front end to the opposite End of the machining area widened to a width that essentially corresponds to the axial extent of the depression to be produced, and itself rising from the base of the tool to a height of at least the depth of the recess to be made, and that the device has a device through which the tool in one of the feed direction different machining direction with a varying machining force is acted upon.

Bei einem erfindungsgemäßen Verfahren, bei dem eine Vorrichtung zur Einbringung einer Vertiefung in ein Werkstück, bei dem ein auf das Werkstück einwirkendes Werkzeug von einer Vorschubeinrichtung in eine Vorschubrichtung bewegt wird, und bei dem mindestens ein Bearbeitungselement des Werkzeugs zur Herstellung einer Vertiefung auf das Werkstück einwirkt, ist erfindungsgemäß vorgesehen, daß das verwendete Werkzeug mindestens ein Bearbeitungselement mit einem Bearbeitungsbereich, der in Vorschubrichtung des Werkzeugs keilförmig ausgestaltet ist und sich von einem vorderen Ende ausgehend zu einem gegenüberliegenden Ende des Bearbeitungsbereichs auf eine Breite verbreitert, die im wesentlichen der axialen Erstreckung der herzustellenden Vertiefung erstreckt und sich von der Grundfläche des Werkzeugs ausgehend auf eine Höhe erhebt, die mindestens die Tiefe der herzustellenden Vertiefung beträgt, und daß das Werkzeug in einer von der Vorschubrichtung unterschiedlichen Bearbeitungsrichtung mit einer variierenden Bearbeitungskraft beaufschlagt wird. In a method according to the invention in which a device for insertion a recess in a workpiece, in which an acting on the workpiece Tool moved by a feed device in a feed direction is, and in which at least one processing element of the tool for Production of a recess acting on the workpiece is according to the invention provided that the tool used at least one machining element with a machining area that is in the feed direction of the tool is wedge-shaped and extends from a front end to one opposite end of the machining area widened to a width, the essentially the axial extent of the recess to be produced extends and extends from the base of the tool to a Elevation that is at least the depth of the recess to be produced, and that the tool in a different direction from the feed direction with a varying machining force.

Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous developments of the invention are the subject of Dependent claims.

Weitere Einzelheiten und Vorteile der Erfindung sind dem Ausführungsbeispiel zu entnehmen, daß im folgenden anhand der Figuren beschrieben wird. Es zeigen:

Figur 1
eine schematische Darstellung des ersten Ausführungsbeispiels,
Figur 2
eine Schnittansicht des ersten Ausführungsbeispiels entlang der Linie B-B der Figur 1,
Figur 3
eine Schnittansicht des ersten Ausführungsbeispiels entlang der Linie A-A der Figur 1, und
Figur 4
drei Ausführungsformen des Werkzeugs.
Further details and advantages of the invention can be found in the exemplary embodiment that is described below with reference to the figures. Show it:
Figure 1
1 shows a schematic illustration of the first exemplary embodiment,
Figure 2
2 shows a sectional view of the first exemplary embodiment along the line BB in FIG. 1,
Figure 3
a sectional view of the first embodiment along the line AA of Figure 1, and
Figure 4
three embodiments of the tool.

Die Figuren 1 bis 3 zeigen eine schematisch dargestellte, allgemein mit 1 bezeichnete Vorrichtung zum Einbringen von Vertiefungen 2a-2d (siehe Figur 4) in ein Werkstück 3a-3e. Die Vorrichtung 1 weist eine Spanneinrichtung 10 auf, in die die Werkstücke 3a-3e einspannbar und dadurch in der Spanneinrichtung 10 lagefixierbar gehalten sind. Die Spanneinrichtung 10 ist von einer Vorschubeinrichtung 11 in den Richtungen des Doppelpfeils X beweglich, so daß zum Beund Entladen der Spanneinrichtung 10 diese aus ihrer in Figur 1 gezeigten Arbeitsstellung weg und nach dem Ladevorgang wieder in die Arbeitsstellung zurückbewegbar ist. Die Vorschubeinrichtung 11 der Spanneinrichtung 10 ist vorzugsweise als hydraulisch oder pneumatisch oder motorisch arbeitend ausgebildet, wobei ein Kolben 12 der Vorschubeinrichtung 11 an der Spanneinrichtung 10 angreift. Durch ein Zuführen eines unter Druck stehenden Arbeitsmediums in eine Kolbenkammer 13 ist somit ein Hin- und Herbewegen der Spanneinrichtung 10 durchführbar. Figures 1 to 3 show a schematically shown, generally designated 1 Device for making depressions 2a-2d (see FIG. 4) in a workpiece 3a-3e. The device 1 has a tensioning device 10, in the workpieces 3a-3e can be clamped and thereby in the clamping device 10 are held in a fixed position. The clamping device 10 is from a feed device 11 movable in the directions of the double arrow X, so that to the Beund Unload the tensioning device 10 from its working position shown in FIG. 1 away and can be moved back to the working position after the loading process is. The feed device 11 of the clamping device 10 is preferably trained as hydraulic or pneumatic or motorized, a piston 12 of the feed device 11 on the clamping device 10 attacks. By feeding a working medium under pressure into a Piston chamber 13 is thus a back and forth movement of the tensioning device 10 feasible.

Der Spanneinrichtung 10 liegt eine Anpreßeinrichtung 20 gegenüber, welche ebenfalls von einer Vorschubeinrichtung 21 - wie weiter unten noch beschrieben wird - in Richtung des Doppelpfeils X' beweglich ist. In entsprechender Art und Weise greift ein Kolben 22 der Vorschubeinrichtung 21 an der Anpreßeinrichtung 20 an, wobei der Kolben 22 wiederum durch das Zuführen eines Arbeitsmediums in einen Kolbenraum 23 der Vorschubeinrichtung 21 hin- und herbeweglich ist.The clamping device 10 is opposite a pressing device 20, which also from a feed device 21 - as described further below is - is movable in the direction of the double arrow X '. In a corresponding manner and A piston 22 of the feed device 21 engages on the pressing device 20, wherein the piston 22 in turn by supplying a working medium is reciprocable in a piston chamber 23 of the feed device 21.

Zwischen die Spanneinrichtung 10 und die Anpreßeinrichtung 20 ist ein Werkzeug 30 von einer Vorschubeinrichtung 31 einschiebbar, welche wiederum einen in einem Kolbenraum 33 geführten Kolben 32 aufweist. Das in einer Führung 25 der Anpreßeinrichtung 20 geführte Werkzeug 30 weist - wie am besten aus Figur 3 ersichtlich ist - eine Anzahl von Bearbeitungselementen 35a-35d auf, wobei die Anzahl der Bearbeitungselemente 35a-35d auf die Anzahl von Vertiefungen 2a-2d abgestimmt ist, die in einem jeden der Werkstücke 3a-3e auszubilden ist.Between the clamping device 10 and the pressing device 20 is a tool 30 can be inserted by a feed device 31, which in turn has a has pistons 32 guided in a piston chamber 33. That in a tour 25 the pressing device 20 guided tool 30 - as best shown in the figure 3 shows - a number of processing elements 35a-35d, the Number of processing elements 35a-35d on the number of depressions 2a-2d is coordinated, which is to be formed in each of the workpieces 3a-3e.

Die Ausbildung des Werkzeugs 30 ist nun am besten aus der Figur 3 ersichtlich. Es weist eine Grundplatte 36 auf, auf der die Bearbeitungselemente 35a-35d angeordnet sind. Wie am besten aus den Darstellungen der Figur 4 ersichtlich ist, ist dabei jedes Bearbeitungselement 35a-35d keilförmig ausgebildet, wobei sich ein keilförmiger Vorderteil 37 der Bearbeitungselemente 35a-35d von einer scharfen Spitze 38 ausgehend bis zum Ende 39 des Bearbeitungsbereichs 40 hin verbreitert, wobei die Breite b des keilförmigen Bearbeitungsbereichs 40 an seinem Ende 39 im wesentlichen gleich der axialen Erstreckung l der entsprechenden Vertiefung 2a-2d ist. In entsprechender Art und Weise steigt der keilförmige Bearbeitungsbereich 40 der Bearbeitungselemente 35a-35d von der in der Grundfläche 36 des Werkzeugs 30 liegenden Spitze 38 auf eine Höhe h an, die im wesentlichen der Tiefe t einer jeden Vertiefung 2a-2d entspricht.The design of the tool 30 can now best be seen in FIG. 3. It has a base plate 36 on which the processing elements 35a-35d are arranged are. As can best be seen from the illustrations in FIG. 4, each processing element 35a-35d is wedge-shaped, whereby a wedge-shaped front part 37 of the processing elements 35a-35d of one sharp tip 38 starting from the end 39 of the machining area 40 widened, the width b of the wedge-shaped processing region 40 at its End 39 substantially equal to the axial extent l of the corresponding one Well 2a-2d. The wedge-shaped rises in a corresponding manner Machining area 40 of the machining elements 35a-35d from that in the Base 36 of the tool 30 lying tip 38 to a height h, the corresponds essentially to the depth t of each depression 2a-2d.

Um nun in die Werkstücke 3a-3e - entsprechend der Anzahl von vier Bearbeitungselementen 35a-35d des Werkzeugs 30 - vier Vertiefungen 2a-2d einbringen zu können, wird zuerst die Spanneinrichtung 10 von der ihr zugeordneten Vorschubeinrichtung 11 aus ihrer in Figur 1 gezeigten Arbeitsstellung wegbewegt, so daß die Werkstücke 3a-3e in entsprechende Aufnahmen 10a-10e der Spanneinrichtung 10 eingesetzt werden können. Danach wird die Spanneinrichtung 10 wieder in ihre Arbeitsstellung bewegt. Die dem Werkzeug 30 zugeordnete Vorschubeinrichtung 31 bewegt dann das Werkzeug 30 entlang der Führung 25 der Anpreßeinrichtung 20 in den Zwischenraum zwischen der Spanneinrichtung 10 und der Anpreßeinrichtung 20. Spätestens wenn das vordere Ende, vorzugsweise eine Spitze 38, des ersten Bearbeitungselements 35a des Werkzeugs 30 an dem in Vorschubrichtung vordersten Werkstück 3a aufsetzt, wird das Werkzeug 30 mit einer in einer Bearbeitungsrichtung B wirkenden, oszillierenden Bearbeitungskraft beaufschlagt, indem die Anpreßeinrichtung 20 von ihrer zugeordneten Vorschubeinrichtung 21 entsprechend hin- und herbewegt wird. Diese Kraftbeaufschlagung erfolgt hierbei vorzugsweise derart, daß die auf das Werkzeug 30 im wesentlichen orthogonal einwirkende, vorzugsweise periodisch oszillierende Bearbeitungskraft zwischen einem Maximalwert und einem Minimalwert variiert, wobei der Minimalwert im Bereich von Null liegen kann, oder sogar einen negativen Wert annimmt, d. h., daß die Anpreßeinrichtung 20 zu diesem Zeitpunkt in einem Rückwärtshub das Werkzeug 30 von den Werkstücken 3a-3e wegbewegt. Gleichzeitig zu dieser hammerartigen Kraftbeaufschlagung des Werkzeugs 30 durch die Anpreßeinrichtung 20 aus der zur Vorschubrichtung 21 im wesentlichen orthogonal verlaufenden Bearbeitungsrichtung B wird von der Vorschubeinrichtung 31 das Werkzeug 30 kontinuierlich, quasi-kontinuierlich oder in diskreten Schritten vorwärts bewegt, wobei desweiteren vorgesehen sein kann, daß auch diese Vorschubbewegung oszillierend erfolgt, wobei die diese Vorschubbewegung bewirkende Vorschubkraft hierbei ebenfalls in ihrem Minimum einen negativen Wert annehmen kann, d. h., daß die Vorschubeinrichtung 31 das Werkzeug 30 zu diesem Zeitpunkt in einem Rückwärtshub zurückbewegt, bevor es in einem darauffolgenden Vorwärtshub wieder vorgeschoben wird.Now in the workpieces 3a-3e - corresponding to the number of four processing elements 35a-35d of tool 30 - make four indentations 2a-2d To be able to, the tensioning device 10 is first of all assigned to it Feed device 11 moved out of its working position shown in FIG. 1, so that the workpieces 3a-3e in corresponding receptacles 10a-10e Clamping device 10 can be used. Then the tensioning device 10 moved back into their working position. The one assigned to tool 30 Feed device 31 then moves tool 30 along the guide 25 of the pressing device 20 in the space between the clamping device 10 and the pressing device 20. At the latest when the front end, preferably a tip 38 of the first machining element 35a of the tool 30 touches down on the foremost workpiece 3a in the feed direction, that is Tool 30 with an oscillating one acting in a machining direction B. Machining force applied by the pressing device 20 by its associated Feed device 21 is moved back and forth accordingly. This Force is preferably applied such that the tool 30 acting essentially orthogonally, preferably periodically oscillating Machining force between a maximum value and a minimum value varies, with the minimum value being in the range of zero, or even one takes a negative value, d. that is, the pressing device 20 at this time in a reverse stroke the tool 30 from the workpieces 3a-3e moved away. Simultaneously to this hammer-like application of force to the Tool 30 through the pressing device 20 from the to the feed direction 21st essentially orthogonal machining direction B is from the Feed device 31 the tool 30 continuously, quasi-continuously or moved forward in discrete steps, further being provided can that this feed movement takes place oscillating, the this The feed force causing the feed movement is also at its minimum can take a negative value, d. that is, the feed device 31 the tool 30 moves back in a reverse stroke at this time, before it is pushed forward in a subsequent forward stroke.

Die Überlagerung der stetigen, intermittierenden oder oszillierenden Vorschubbewegung des Werkzeugs 30 und der im wesentlichen orthogonal zur Vorschubbewegung erfolgenden, hammerartigen Kraftbeaufschlagung des Werkzeugs 30 in Verbindung mit der vorstehend beschriebenen Keilform der Bearbeitungselemente 35a-35d bewirkt in vorteilhafter Art und Weise, daß das Einbringen der Vertiefungen 2a-2d in die Werkstücke 3a-3e mit einer nur minimalen und > darüber hinaus nur lokal im Bereich der Vertiefungen 2a-2d einwirkenden Bearbeitungskraft und somit mit einer nur äußerst geringen Materialbelastung durchführbar ist. Dies macht die beschriebene Vorgangsweise insbesondere für dünnwandige Rohre geeignet, da in diese nun besonders einfach Vertiefungen eingebracht werden können, ohne daß die Gefahr besteht, daß beim Einbringvorgang die Gefahr von Durchrissen des Wandmaterials der Werkstücke 3a-3e im Bereich der Vertiefungen 2a-2d besteht.The superimposition of the continuous, intermittent or oscillating feed movement of tool 30 and which is substantially orthogonal to Feeding movement, hammer-like force application of the tool 30 in connection with the wedge shape of the machining elements described above 35a-35d advantageously brings about the introduction of the depressions 2a-2d in the workpieces 3a-3e with a minimal and > In addition, machining force acting only locally in the area of the depressions 2a-2d and thus can be carried out with only an extremely low material load is. This makes the procedure described especially for thin-walled Tubes are suitable because they are now particularly easy to make recesses in can be without the risk that during the insertion process the danger of tearing through the wall material of the workpieces 3a-3e in the area of the depressions 2a-2d.

Wie aus der Figur 3 ersichtlich ist, wird bevorzugt, daß die einzelnen Bearbeitungselemente 35a-35e des Werkzeugs 30 in Vorschubrichtung versetzt angeordnet sind. Diese Maßnahme besitzt den Vorteil, daß die Herstellung einzelner Vertiefungen 2a-2d in einem Werkstück 3a-3e zeitlich versetzt erfolgt, wodurch in vorteilhafter Art und Weise die von der Vorschubeinrichtung 31 aufzubringende Vorschubkraft reduziert wird. Dies bedeutet, daß - wie bereits beschrieben - zuerst die Spitze 38 des ersten Bearbeitungselements 35a des Werkzeugs 30 auf das Werkstück 3a einwirkt. Eine weitere Vorschubbewegung des Werkzeugs 30 bringt mit sich, daß danach der auf die Spitze 38 folgende vordere Bereich 37 des ersten Bearbeitungselements 35a die Wand 3a' des rohrförmigen Werkstücks 3a beaufschlagt, wodurch sukzessive die Herstellung der ersten Vertiefung im Werkstück 3a erfolgt. Dann wirkt die Spitze 38 des zweiten Bearbeitungselements 35b auf die Wand des ersten Werkstücks 3a ein, wodurch sukzessive die zweite Vertiefung 2b im Werkstück 3a durchgeführt wird. In entsprechender Art und Weise werden durch die Bearbeitungselemente 35c, 35d die dritte und die vierte Vertiefung 2c, 2d im ersten Werkstück 3a hergestellt, wobei - wie bereits oben erwähnt - in der Vorschubbewegung des Werkzeugs 30 durch ihre Vorschubeinrichtung 31 eine durch die Anpreßeinrichtung 20 erfolgende, hammerartige Kraftbeaufschlagung des Werkzeugs 30 und somit seiner Bearbeitungselemente 35a-35d erfolgt.As can be seen from Figure 3, it is preferred that the individual processing elements 35a-35e of the tool 30 are arranged offset in the feed direction are. This measure has the advantage that the manufacture of individual Indentations 2a-2d in a workpiece 3a-3e occur at different times, whereby in advantageous manner to be applied by the feed device 31 Feed force is reduced. This means that - as already described - first the tip 38 of the first machining element 35a of the tool 30 the workpiece 3a acts. Another feed movement of the tool 30 entails that thereafter the front region 37 following the tip 38 of the first machining element 35a, the wall 3a 'of the tubular workpiece 3a applied, which successively the production of the first recess takes place in workpiece 3a. Then the tip 38 of the second processing element acts 35b onto the wall of the first workpiece 3a, thereby successively the second depression 2b is carried out in the workpiece 3a. In corresponding The processing elements 35c, 35d fashion the third and the fourth recess 2c, 2d is produced in the first workpiece 3a, whereby - as already mentioned above - in the feed movement of the tool 30 by their Feed device 31 a by the pressing device 20, Hammer-like force application of the tool 30 and thus its processing elements 35a-35d.

Nachdem das erste Bearbeitungselement 35a das erste Werkstück 3a durchsetzt hat, tritt seine Spitze 38 auf das zweite Werkstück 3b auf. Bei einer weiteren Vorschubbewegung wird durch das erste Bearbeitungselemente 35a die erste Vertiefung des zweiten Werkstücks 3b erzeugt. In entsprechender Art und Weise erzeugen dann die weiteren Bearbeitungselemente 35b-35d des Werkzeugs 30 die zweite bis vierte Vertiefung des zweiten Werkstücks 3b. In entsprechender Art und Weise erfolgt dann durch eine weitere Vorschubbewegung des Werkzeugs 30 die Herstellung der entsprechenden Vertiefungen der Werkstücke 3c-3e.After the first machining element 35a passes through the first workpiece 3a has its tip 38 occurs on the second workpiece 3b. With another feed movement becomes the first depression by the first machining element 35a of the second workpiece 3b. Generate in a corresponding manner then the further processing elements 35b-35d of the tool 30 die second to fourth recess of the second workpiece 3b. In a similar way and then takes place by a further feed movement of the tool 30 the production of the corresponding depressions of the workpieces 3c-3e.

Die in Vorschubrichtung versetzte Anordnung der Bearbeitungselemente 35a-35d bedingt hierbei, daß ihr hinterer, an den eigentlichen Bearbeitungsbereich 40 anschließende, sich vom Ende 39 des Bearbeitungsbereichs 40 zum Ende 35a'-35d' des Bearbeitungselements 35a-35d erstreckender Bereich 41 derartig ausgebildet ist, daß dieser die Vorschubbewegung des Werkzeugs 30 dann nicht behindert, wenn der Bearbeitungsbereich 40 der Bearbeitungselemente 35a-35d bereitsdurch die Vertiefung 2a-2d im Werkstück 3a-3e hindurchgetreten ist, d. h., der hintere Bereich 41 eines jeden Bearbeitungsbereichs 40 ist derart gestaltet, daß er durch die Vertiefung, die durch den Bearbeitungsbereich 40 des Bearbeitungselements 35a-35d erzeugt wurde, hindurchschiebbar ist.The arrangement of the processing elements 35a-35d offset in the feed direction hereby requires that its rear, adjoining the actual processing area 40, itself from the end 39 of the machining area 40 to the end 35a'-35d 'of the machining element 35a-35d extending region 41 such is designed so that the feed movement of the tool 30 is not hinders when the machining area 40 of the machining elements 35a-35d has already passed through the recess 2a-2d in the workpiece 3a-3e, d. H., the rear area 41 of each processing area 40 is designed in such a way that it passes through the recess through the machining area 40 of the machining element 35a-35d was generated, can be pushed through.

Bei obiger Beschreibung wird davon ausgegangen, daß die auf das Werkzeug 30 in Bearbeitungsrichtung B einwirkende, oszillierende Kraft durch eine entsprechende Bewegung der Vorschubeinrichtung 21 der Anpreßeinrichtung 20 erzeugt wird. Es ist aber auch möglich, daß die Spanneinrichtung 10 durch ihre Vorschubeinrichtung 11 ergänzend zur oszillierenden Bewegung der Anpreßeinrichtung 20 oder anstelle dieser in entsprechender Art und Weise bewegt wird, so daß die auf das Werkzeug 30 einwirkende hammerartige Bearbeitungskraft ganz oder teilweise von der Spanneinrichtung 20 eingebracht wird. Wird die seitliche tCraftbeaufschtagung des Werkzeugs 30 lediglich durch eine Bewegung der Spanneinrichtung 10 durchgeführt, so kann die Vorschubeinrichtung 21 der Anpreßeinrichtung 20 in der Regel entfallen.In the above description, it is assumed that the tool 30 in the direction of machining B, oscillating force by a corresponding Movement of the feed device 21 of the pressing device 20 is generated becomes. But it is also possible that the clamping device 10 through its feed device 11 in addition to the oscillating movement of the pressure device 20 or instead of this is moved in a corresponding manner, so that the hammer-like machining force acting on the tool 30 entirely or is partially introduced by the clamping device 20. Will the side Force application of the tool 30 only by a movement of the Clamping device 10 carried out, the feed device 21 of the pressing device 20 are usually omitted.

Es ist auch denkbar, daß für einige Anwendungsfälle die seitliche Kraftbeaufschlagung des Werkzeugs 30 nicht erforderlich ist, und daß vielmehr dann eine oszillierende Vorschubbewegung des Werkzeugs 30 ausreichend ist.It is also conceivable that the lateral application of force for some applications of the tool 30 is not required, and that rather then a oscillating feed movement of the tool 30 is sufficient.

Es soll noch darauf hingewiesen werden, daß durch die beschriebene Vorgangsweise eine Vielzahl von unterschiedlichen Vertiefungsgeometrien erzeugbar ist, wie dies aus den drei Abbildungen der Figur 4 - welche bevorzugte Beispiel darstellen - ersichtlich ist. Die in Figur 4 untere Darstellung zeigt eine im wesentlichen halbkreisförmige Vertiefung 2c. Dementsprechend ist auch der Bearbeitungsbereich 40 des Bearbeitungselements 35 in der Form eines entsprechenden Halbkegels ausgebildet.It should be pointed out that by the procedure described a large number of different recess geometries can be generated, like this from the three figures of Figure 4 - which represent preferred example - can be seen. The lower illustration in FIG. 4 essentially shows one semicircular recess 2c. The processing area is also corresponding 40 of the processing element 35 in the form of a corresponding one Half cone formed.

Die in Figur 4 mittlere Darstellung zeigt eine im wesentlichen rechteckige Vertiefung 2b, wobei der Bearbeitungsbereich 40 wie aus der Figur 4 ersichtlich geformt ist.The middle illustration in FIG. 4 shows an essentially rectangular depression 2b, the machining area 40 being shaped as shown in FIG. 4 is.

Die in Figur 4 obere Darstellung zeigt eine im wesentlichen sägezahnförmige Vertiefung 2a, wie sie z B. als Rastelement bei Kopfstützen für Kraftfahrzeuge verwendet wird. Eine zur axialen Richtung des Werkstücks 3 verlaufende Rastschräge 2a' geht hierbei in eine im wesentlichen orthogonal zu der Längsrichtung des Werkstücks 3 verlaufende Rastfläche 2a" über. Dementsprechend ist der Bearbeitungsbereich 40 des Bearbeitungselements 35 derart ausgebildet, daß der Bearbeitungsbereich 40 in Draufsicht und in Seitenansicht die Form eines rechtwinkeligen Dreiecks besitzt.The upper illustration in FIG. 4 shows an essentially sawtooth shape Indentation 2a, such as that used as a locking element in headrests for motor vehicles is used. A locking slope extending to the axial direction of the workpiece 3 2a 'goes in a substantially orthogonal to the longitudinal direction of the workpiece 3 extending locking surface 2a ". Accordingly, the processing area 40 of the processing element 35 formed such that the Machining area 40 in plan view and side view the shape of a rectangular Triangle.

Wie aus den beiden oberen Bearbeitungselementen 35 der Figur 4 ersichtlich ist, ist vorzugsweise vorgesehen, daß der keilförmige Bearbeitungsbereich 40 an seiner Oberfläche Ausnehmungen 43 aufweist, welche vorzugsweise alternierend angeordnet sind. Diese Maßnahme besitzt die Wirkung, daß hierdurch im Bereich der Ausnehmungen 43 keine Einwirkung auf das bearbeitete Werkstück 3 erfolgt, was den Effekt mit sich bringt, daß die Kraftbeaufschlagung und somit die Einwirkung durch das Bearbeitungselement 35 auf der der Ausnehmung 43 gegenüberliegenden Seite erhöht wird.As can be seen from the two upper processing elements 35 in FIG. 4, it is preferably provided that the wedge-shaped processing area 40 has recesses 43 on its surface, which are preferably alternating are arranged. This measure has the effect that this results in the area the recesses 43 have no effect on the machined workpiece 3, which has the effect that the application of force and thus the action through the processing element 35 on the opposite of the recess 43 Side is increased.

Bei den vorstehend beschriebenen Ausführungsbeispielen wurde davon ausgegangen, daß die Bearbeitungselemente 35a-35d auf das Werkstück 3a-3e im wesentlichen orthogonal einwirken. Es ist aber auch möglich, daß die Bearbeitungselemente 35a-35d auf der Grundfläche des Werkstücks 3a-3e derart angeordnet sind, daß sie unter einem definierten Winkel zur Orthogonalen auf diese Werktsücke 3a-3e einwirken. Hierdurch ist es dann möglich, daß Hinterschneidungen in den Vertiefungen 2a-2d erzeugbar sind.In the exemplary embodiments described above, it was assumed that the machining elements 35a-35d on the workpiece 3a-3e essentially act orthogonally. But it is also possible that the processing elements 35a-35d arranged on the base of the workpiece 3a-3e in such a way are that they are at a defined angle to the orthogonal to this workpiece 3a-3e. This then makes it possible for undercuts can be generated in the depressions 2a-2d.

Außerdem wurde bei der obigen Beschreibung davon ausgegangen, daß die Werkstücke 3a-3e lagefixiert in der Spanneinrichtung 10 aufgenommen sind, so daß durch die beschriebene Vorgangsweise nicht-umlaufende Vertiefungen 2a-2d herstellbar sind. Es ist aber auch möglich, vorzusehen, daß während des Bearbeitungsvorgangs die Werkstücke 3a-3e um ihre Längsachse gedreht werden, so daß vollständige oder nur um einen definierten Winkelbereich umlaufende Vertiefungen 2a-2d erzeugbar sind.In addition, it was assumed in the above description that the Workpieces 3a-3e are fixed in position in the clamping device 10, see above that by the procedure described non-circumferential depressions 2a-2d can be produced. But it is also possible to provide that during the Machining process, the workpieces 3a-3e are rotated about their longitudinal axis, so that complete or only revolving around a defined angular range Wells 2a-2d can be generated.

Die beschriebene Vorrichtung eignet sich insbesondere zur Herstellung einer Verzahnung in einem rohrförmigen Werkstück, insbesondere einem dünnwandigen Werkstück. Durch die Anordnung einer entsprechenden Anzahl von Bearbeitungselementen 35a-35d im Werkzeug 30 ist es durch eine entsprechende Beabstandung dieser Bearbeitungselemente 35a-35d besonders einfach möglich, die Verzahnung oder zumindest einen Abschnitt dieser Verzahnung wie vorstehend beschrieben herzustellen. Wenn mehr Verzahnungselemente der Verzahnung herzustellen sind als im Werkzeug 30 Bearbeitungselemente 35a-35d vorhanden sind, so ist vorzugsweise vorgesehen, daß die Vorrichtung 1 eine Vorschubeinrichtung (nicht gezeigt) aufweist, durch die das oder die Werkstücke 3a-3e in ihrer axialen Richtung, nachdem der Bearbeitungsvorgang durch das Werkzeug 30 beendet wurde, vorschiebbar ist oder sind.The device described is particularly suitable for producing a Gearing in a tubular workpiece, especially a thin-walled one Workpiece. By arranging a corresponding number of processing elements 35a-35d in the tool 30 is by an appropriate spacing of these processing elements 35a-35d particularly easily possible Gearing or at least a portion of this gearing as above described. If more gearing elements of the gearing are to be produced as machining elements 35a-35d in the tool 30 are, it is preferably provided that the device 1 is a feed device (not shown), through which the workpiece (s) 3a-3e in their axial direction after the machining operation by the tool 30 has ended, can be pushed forward.

Claims (28)

  1. A device for forming a recess in a workpiece, wherein said device comprises a tool (30) that can be moved by a forward feed device (31), said tool (30) having at least one working element (35; 35a-35d) for the production of said recess (2a-2d) in said workpiece (3a-3e), characterized in that at least one of said working elements (35; 35a-35d) is provided with a working area (40) that is wedge-shaped and that widens from a front end (38) to an opposite end (39) thereof to a width corresponding substantially to an axial elongation (I) of said recess (2a-2d) to be formed; said working area (40) rising from a base (36) of said tool (30) to a height (h) corresponding to the depth (t) of the said recess (2a-2d) to be formed; said device (1) comprises a mechanism (10, 11; 20, 21) by which a working force acting in a working direction (B) differing from the feed direction can be applied on the tool (30).
  2. Device according to claim 1, characterized in that said working forces is an oscil-lating force, preferably a periodically oscillating force.
  3. Device according to claim 2, characterized in that said working force acting in the working direction (B) on the tool (30) varies between a maximum value and a minimum value.
  4. Device according to claim 3, characterized in that said minimum value of said hammer-like force applied on said tool (30) is ≤ 0, so that after the application of force on the tool (30) in a forward stroke by said mechanism (10, 11; 20, 21), the tool (30) is moved away from said at least one workpiece (3a-3e) in a subsequent reverse stroke.
  5. Device according to any of the preceding claims, characterized in that said device (1) comprises a mounting device (10) for mounting said at least one workpiece (3a-3e).
  6. Device according to claim 5, characterized in that said mounting device (10) comprises a feed device (11), and that the mounting device (10) is movable by the feed device (11) for applying the working force to the tool (30).
  7. Device according to any of the preceding claims, characterized in that said device (21) comprises a pressing device (20), said pressing device (20) being located opposite to said mounting device (10).
  8. Device according to claim 7, characterized in that said pressing device (20) comprises a feed device (21), by which.said pressing device (20) is movable for engaging the tool (30).
  9. Device according to any of the preceding claims, characterized in that said tool (30) is movable steadily, intermittingly or oscillatingly past the workpiece (3a-3e) being mounted in the mounting device (10) by a feed device.
  10. Device according to any of the preceding claims, characterized in that said feed device (31) generates a feeding force for the tool (30), said force varying in strength and direction.
  11. Device according to claim 10, characterized in that a feeding force for the tool (30) is generated by said feed device (31) such that after a forward stroke, by which said tool (30) is moved in its feed direction, in a subsequent reverse stroke a backward motion of the tool (30) in a direction opposite to said feed direction is performed.
  12. Device according to any of the preceding claims, characterized in that said working area (40) of at least one of said working elements (35a-35d) of said tool (30) has in a plane being orthogonal to the tool's longitudinal direction a rectangular, triangular, oval, polygonal or semicircular cross-sectional shape.
  13. Device according to any of the preceding claims, characterized in that at least one working area (40) of at least one of said working elements (35a-35d) of said tool (30) comprises at least a recess (43) running in a longitudinal direction of said working area (40).
  14. Device according to any of the preceding claims, characterized in that at least one of said working elements (35a-35d) of said tool (30) is orthogonal to a base (36) of said tool (30).
  15. Device according to any of the preceding claims, characterized in that at least one of said working elements (35a-35d) of said tool (30) is inclined with respect to said base (36) of said tool (30).
  16. Device according to any of the preceding claims, characterized in that at least one of said feed devices (11, 21, 31) comprises a pneumatically or hydraulically operated piston (11', 21', 31') for the generation of said working force.
  17. Device according to any of the preceding claims, characterized in that at least one of said feed devices (12, 22, 32) is powered by a motor.
  18. Device according to any of the preceding claims, characterized in that at least two of said working elements (35a-35d) of said tool (30) are arranged staggeredly in the feed direction of said tool (30).
  19. Device according to any of the preceding claims, characterized in that said tool (30) is guided in a guide element (25) of said pressing device (20).
  20. Device according to any of the preceding claims, characterized in that said device (1) comprises a mechanism for turning at least one of the workpieces (3a-3e) around its longitudinal axis.
  21. Device according to any of the preceding claims, characterized in that said device (it comprises a mechanism for forwarding at least one of the workpieces (3a-3e) in its axial direction.
  22. A method for forming a recess in a workpiece, whereby a tool (30) acting on a workpiece is moved in a feed direction by means of a feed device (31), whereby at least one working element (35; 3a-35d) of the tool (30) acts for forming the recess (2a-2d) on the workpiece (3a-3e), characterized in that the tool (30) used has at least one working element (35; 35a-35d) having a working area (40) which is wedge-shaped in the feed direction and widens from a front end (38) to an opposite end (39) of said working area (40) to a width (b), this width (b) being substantially equal to the axial extent (I) of the recess (2a-2d) to be formed, and rises from the base (36) of said tool (30) to a height (h), said height (h) being at least the depth (t) of said recess (2a-2d) to be formed, and that the tool (30) is subjected to a working force having a working direction (B) different from the feed direction.
  23. The method according to claim 22, characterized in that said working force is an oscillating, preferably a periodically oscillating force.
  24. The method according to any of the preceding claims, characterized in that said working force acting on said tool (30) in said working direction (B) varies between a minimum value and a maximum value.
  25. The method according to daim 24, characterized in that said minimum value of that hammer-like force acting on said tool (30) is less or equal 0, and that the tool (30) is subjected to the working force in a forward stroke of the device (10, 11; 20, 21) generating the working force, and that in a subsequent reverse stroke said tool (30) is moved away from said at least one workpiece (3a-3e).
  26. The method according to any of the preceding claims, characterized in that said tool (30) is moved steadily, intermittingly or oscillatingly in respect to said at least one workpiece (3a-3e) mounted in a mounting device (10) by a feed device (31)
  27. The method according to any of the preceding claims, characterized in that said feed device (31) produces a feeding force of varying strength and direction for said tool (30).
  28. The method according to claim 27, characterized in that by said feed device (31) of said tool (30) a feeding force is generated in such a way that after a forward stroke, in which the tool (30) is moved in its feed direction, in a subsequent reverse stroke a backward motion of the tool (30), the backward motion being oppositely directed to the feed direction, is performed.
EP00954644A 1999-08-28 2000-08-23 Device and method for forming a recess in a workpiece Expired - Lifetime EP1212155B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19940995 1999-08-28
DE19940995A DE19940995A1 (en) 1999-08-28 1999-08-28 Device for making a recess in a workpiece
PCT/EP2000/008208 WO2001015827A1 (en) 1999-08-28 2000-08-23 Device and method for forming a recess in a workpiece

Publications (2)

Publication Number Publication Date
EP1212155A1 EP1212155A1 (en) 2002-06-12
EP1212155B1 true EP1212155B1 (en) 2003-09-24

Family

ID=7920001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00954644A Expired - Lifetime EP1212155B1 (en) 1999-08-28 2000-08-23 Device and method for forming a recess in a workpiece

Country Status (9)

Country Link
EP (1) EP1212155B1 (en)
JP (1) JP2003508225A (en)
KR (1) KR20020053056A (en)
AT (1) ATE250474T1 (en)
CA (1) CA2381844A1 (en)
CZ (1) CZ2002732A3 (en)
DE (2) DE19940995A1 (en)
HU (1) HUP0203327A2 (en)
WO (1) WO2001015827A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015012694A1 (en) 2015-09-26 2017-03-30 Icm - Institut Chemnitzer Maschinen- Und Anlagenbau E.V. Method, tool and device for introducing a cavity cutting a hollow body by at least partial pressure forming

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171371A (en) * 1937-12-24 1939-08-29 Du Pont Crimping device
US3656879A (en) * 1969-01-14 1972-04-18 N L Applic Sa Method of manufacturing a burner and a burner thus manufactured

Also Published As

Publication number Publication date
WO2001015827A1 (en) 2001-03-08
HUP0203327A2 (en) 2003-01-28
JP2003508225A (en) 2003-03-04
DE19940995A1 (en) 2001-03-15
DE50003853D1 (en) 2003-10-30
CZ2002732A3 (en) 2002-08-14
KR20020053056A (en) 2002-07-04
CA2381844A1 (en) 2001-03-08
EP1212155A1 (en) 2002-06-12
ATE250474T1 (en) 2003-10-15

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