EP0995513B1 - Method and device for removing a slug from an internal high-pressure forming tool - Google Patents
Method and device for removing a slug from an internal high-pressure forming tool Download PDFInfo
- Publication number
- EP0995513B1 EP0995513B1 EP19990810930 EP99810930A EP0995513B1 EP 0995513 B1 EP0995513 B1 EP 0995513B1 EP 19990810930 EP19990810930 EP 19990810930 EP 99810930 A EP99810930 A EP 99810930A EP 0995513 B1 EP0995513 B1 EP 0995513B1
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- workpiece
- slug
- die
- guide channel
- punch
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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
- B21D28/24—Perforating, i.e. punching holes
- B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
Definitions
- the invention relates to methods for removing or resulting in a hole punching orifice. Waste pieces of a designed as a hollow profile workpiece, which is acted upon by a flowable medium generated by an active medium, according to the preamble of Patentansprspruches 1 and 2, the invention further comprises an apparatus for performing the method, according to the preamble of claims 4 and 5.
- a hollow profile is expanded by internal pressure and thus redesigned.
- the hollow profile can be pushed by means of at least one punch, which engages the front side of the workpiece. The latter can be widened, compressed or expanded in this way.
- US-A-5 398 533 discloses a template for a hydroformed quadrangular tube. Whose bottom wall is associated with the provided with a cutting edge of a forehead held in a guide channel stamp, which interacts with an inclined guide plane at the other end. Thanks to this, the stamp is pushed against that bottom wall. If a hole edge is pressed into it by that cutting edge, the material disc formed in it - from a section of the tube wall - is pushed by the internal pressure into the guide channel.
- EP 0 940 200 A2 (prior art according to Art. 54 (3) EPC) describes a method and an apparatus for removing a hole casing made of a two-part hydroforming die, separated from the wall of a hollow profile by means of a fluidic internal high pressure; this consists of a lower tool, in the diametrical plane through the central axis of the cross-sectionally circular mold space of the device an upper tool can be placed.
- the latter contains in its zenith a Lochbutzenkanal.
- the Lochbutzen is cut out with respect to the hollow profile from the inside to the outside with retraction of the Lochbutzenkanal on retraction releasing punch and pressed out of the mold space of the forming tool out into the Lochbutzenkanal.
- the Lochbutzen should be kept at the punch face during his stay in the porthole channel by an adhesive associated with the stamp; after opening the forming tool and after removing the fertigumgeformformed hollow profile of the Lochbutzen is guided under permanent adhesion to the punch face by means of the punch in the open mold space.
- the pinhole and the area of the removal tool in which the adhesive acts take an opposite relative position to each other, after which the pinhole is detached from the punch and then adheres to the removal tool, by means of which the adhering Lochbutzen is then led out of the forming tool.
- US-A-5 460 026 discloses some steps in the formation of slugs through the use of a hydraulic ram, as discussed above in US-A-816 089. The nature of the removal of the Butzens is not shown.
- the slug must be disposed of safely.
- the slug When punching from the inside to the outside, the slug is in the cutting die after punching. This can be arranged in the upper or in the lower half of the mold. Depending on where the die and the slugs are located, gravity can be used for disposal - or it must be overcome.
- the slugs are disposed of by flushing out of the tool or left by folding the slugs on the workpiece. Wiping out will make it impossible to verify that all the slugs have been removed and the process is being lengthened.
- the folding over of the slugs usually makes mounting with screws or rivets impossible.
- the slug can tear off after assembly, it also unnecessarily increases the weight.
- the inventor has set the goal to eliminate the identified disadvantages and to improve the method described above and especially the disposal options and to provide a device for it.
- the front end of the guide channel which is designed as a guide bore of the punch die formed as an upper tool, is retracted by the amount of the thickness of the workpiece into the guide bore in the pressure direction of the active medium, ie against the pressure direction of the punch and the slug from the workpiece tracked by the internal pressure, after which the punch with adjacent slug in the printing direction of the active medium of the die surface is further removed.
- the end of the punch also guided in that guide bore should be stirred by the workpiece adjacent die surface about the extent of that thickness of the workpiece against the printing direction of the active medium in the workpiece and with him the slug are released from the workpiece at a distance from the die surface, after which punches and slugs in opposite directions - ie after pressure reduction and opening the tool in the printing direction - are performed.
- the slug is simply ejected into a cavity in the profile, ie in front of the die or the fresh recess releasing the slug, driven catcher by a punch; the slug passes into a drip pan in free fall.
- a suction device possibly supported by a nozzle - held in front of the cutting die, and the punch in the cutting die is brought forward, whereby the ejected slug is disposed of immediately.
- the Butzenentsorgung is optimized in the manner described.
- the inventive device includes for the upper tool a retracting into the profile cavity sump.
- a suction device is provided on the lower tool to lift out the slug.
- the wall thickness example of a wall portion of a hollow section 10 whose longitudinal axis is indicated at A - is a surface 12 of a die 14 with a guide bore 16 for a cylindrical punch 18 with longitudinal axis B can be seen.
- This workpiece 10 is acted upon in the context of a hydroforming process on its side facing away from the punch 18 surface 11 with high pressure.
- FIG. 3 illustrates the complete material separation with increasing distance of the punch 18 from the workpiece 10.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
Description
Die Erfindung betrifft Verfahren zum Entnehmen von bei einem Lochungsvorgang entstehenden Butzen od.dgl. Abfallstücken von einem als Hohlprofil ausgebildeten Werkstück, das von einem durch ein strömbares Wirkmedium erzeugten Innenhochdruck beaufschlagt wird, nach dem Oberbegriff der Patentänspruches 1 und 2 zudem erfasst die Erfindung eine Vorrichtung zur Durchführung das Verfahrens, gemäß dem Oberbegriff des Ansprüche 4 und 5.The invention relates to methods for removing or resulting in a hole punching orifice. Waste pieces of a designed as a hollow profile workpiece, which is acted upon by a flowable medium generated by an active medium, according to the preamble of Patentansprspruches 1 and 2, the invention further comprises an apparatus for performing the method, according to the preamble of claims 4 and 5.
Beim sog. Innenhöcndruck-Umformen (IHU-Verfahren) wird ein Hohlprofil durch Innendruck ausgedehnt und so umgestaltet. Zusätzlich kann das Hohlprofil mittels wenigstens eines Stempels nachgeschoben werden, der am Werkstück stirnseitig angreift. Letzteres kann in dieser Art aufgeweitet, gestaucht bzw. expandiert werden.In the so-called internal cavity pressure forming (hydroforming process), a hollow profile is expanded by internal pressure and thus redesigned. In addition, the hollow profile can be pushed by means of at least one punch, which engages the front side of the workpiece. The latter can be widened, compressed or expanded in this way.
Der US-A-5 398 533 ist eine Matrize für ein hydrogeformtes Rohr viereckigen Querschnitts zu entnehmen. Dessen Bodenwand ist die mit einer Schneidkante versehene Stirn eines in einem Führungskanal gehaltenen Stempels zugeordnet, der andernends mit einer schrägen Führungsebene zusammenwirkt. Dank deren wird der Stempel gegen jene Bodenwand geschoben. Ist in diese durch jene Schneidkante ein Lochrand eingedrückt, wird die in diesem -- aus einem Abschnitt der Rohrwand -- entstandene Materialscheibe durch den Innendruck in den Führungskanal geschoben.US-A-5 398 533 discloses a template for a hydroformed quadrangular tube. Whose bottom wall is associated with the provided with a cutting edge of a forehead held in a guide channel stamp, which interacts with an inclined guide plane at the other end. Thanks to this, the stamp is pushed against that bottom wall. If a hole edge is pressed into it by that cutting edge, the material disc formed in it - from a section of the tube wall - is pushed by the internal pressure into the guide channel.
Die nachveröffentlichte EP 0 940 200 A2 (Stand der Technik gemäß Art. 54(3) EPÜ) beschreibt ein Verfahren und eine Vorrichtung zum Entfernen eines aus der Wand eines Hohlprofils mittels eines fluidischen Innenhochdruckes getrennten Lochbutzens aus einem zweiteiligen Innenhochdruck-Umformwerkzeug; dieses besteht aus einem Unterwerkzeug, dem in der Diametralebene durch die Mittelachse des querschnittlich kreisförmigen Formraumes der Vorrichtung ein Oberwerkzeug aufsetzbar ist. Letzteres enthält in seinem Zenit einen Lochbutzenkanal. Der Lochbutzen wird bezüglich des Hohlprofils von innen nach außen unter Zurückziehen eines den Lochbutzenkanal beim Zurückziehen freigebenden Stempels herausgetrennt und aus dem Formraum des Umformwerkzeuges heraus in den Lochbutzenkanal hineingepresst. Danach wird in drucklosem Zustand des Hohlprofils der nach dem Hineinpressen an der Stirnseite des Stempels anliegende Lochbutzen mittels eines als Saugeinrichtung ausgebildeten Entnahmewerkzeuges aus dem Umformwerkzeug entfernt. Um ein Entfernen des Lochbutzens aus dem Umformwerkzeug heraus in einfacher Weise zu ermöglichen, soll der Lochbutzen an der Stempelstirnseite während seines Aufenthaltes im Lochbutzenkanal durch ein mit dem Stempel verbundenes Haftmittel gehalten werden; nach Öffnen des Umformwerkzeuges und nach der Entnahme des fertigumgeformten Hohlprofils wird der Lochbutzen unter bleibender Haftung an der Stempelstirnseite mittels des Stempels in den offenen Formraum hineingeführt. Der Lochbutzen und der Bereich des Entnahmewerkzeuges, in dem das Haftmittel wirkt, nehmen eine gegenüberliegende Relativlage zueinander ein, wonach der Lochbutzen vom Stempel abgelöst wird und dann am Entnahmewerkzeug anhaftet, mittels dessen der anhaftende Lochbutzen anschließend aus dem Umformwerkzeug herausgeführt wird.The subsequently published EP 0 940 200 A2 (prior art according to Art. 54 (3) EPC) describes a method and an apparatus for removing a hole casing made of a two-part hydroforming die, separated from the wall of a hollow profile by means of a fluidic internal high pressure; this consists of a lower tool, in the diametrical plane through the central axis of the cross-sectionally circular mold space of the device an upper tool can be placed. The latter contains in its zenith a Lochbutzenkanal. The Lochbutzen is cut out with respect to the hollow profile from the inside to the outside with retraction of the Lochbutzenkanal on retraction releasing punch and pressed out of the mold space of the forming tool out into the Lochbutzenkanal. Thereafter, in the unpressurized state of the hollow profile of the fitting after pressing in on the front side of the punch Lochbutzen removed by means of a suction device designed as a removal tool from the forming tool. In order to allow removal of the Lochbutzens out of the forming out in a simple manner, the Lochbutzen should be kept at the punch face during his stay in the porthole channel by an adhesive associated with the stamp; after opening the forming tool and after removing the fertigumgeformformed hollow profile of the Lochbutzen is guided under permanent adhesion to the punch face by means of the punch in the open mold space. The pinhole and the area of the removal tool in which the adhesive acts take an opposite relative position to each other, after which the pinhole is detached from the punch and then adheres to the removal tool, by means of which the adhering Lochbutzen is then led out of the forming tool.
Gemäß US-A-5 816 089 werden aus einem horizontal gelagerten Werkstück mittels eines in einem vertikalen Führungskanal des Werkzeuges vorgesehenen Stempels-Butzen entfernt sowie die entstandenen Butzen im Führungskanal angehoben und im freien Flug einer. Sammellade zugeführt. Dabei wird die Stempelstirn um das halbe Maß der Dicke des Werkstückes gegen die Druckrichtung eines Mediums eingeführt und der Butzen aus dem Werkstück gelöst. Anschließend wird der Stempel mit dem an seiner Stirn befindlichen Butzen in Druckrichtung des Mediums bis zu einem -- den erwähnten freien Flug ermöglichenden -- Seiten- oder Querkanal angehoben.According to US-A-5,816,089 are removed from a horizontally mounted workpiece by means provided in a vertical guide channel of the tool punch-slug and raised the resulting slugs in the guide channel and in the free flight of a. Collective charged. The punch face is introduced by half the measure of the thickness of the workpiece against the pressure direction of a medium and the slug is released from the workpiece. Subsequently, the stamp is raised with the slug located on its forehead in the printing direction of the medium up to a - the said free flight enabling - side or cross channel.
Der US-A-5 460 026 sind einige Schritte beim Entstehen von Butzen durch den Einsatz eines hydraulischen Stempels zu entnehmen, wie sie oben zu US-A-816 089 erörtert werden. Die Art der Abführung des Butzens ist allerdings nicht dargestellt.US-A-5 460 026 discloses some steps in the formation of slugs through the use of a hydraulic ram, as discussed above in US-A-816 089. The nature of the removal of the Butzens is not shown.
Im Falle des Einbringens von Löchern oder Ausnehmungen in ein solches Werkstück ist die Entsorgung der entstehenden ausgestanzten Abfallstücke, also der Butzen, von besonderer Bedeutung. Die üblichen Schritte zum Entsorgen von Butzen beim Lochen von innen nach außen im Ablauf eines Innenhochdruck-Umformvorgangs sind:
- Werkstück in das offene Werkzeug einlegen;
- Werkzeug schließen;
- kalibrieren und lochen;
- Werkzeug öffnen;
- Werkstück entnehmen.
- Insert workpiece into the open tool;
- Close tool;
- calibrate and punch;
- Open tool;
- Remove workpiece.
Wurde beim Kalibrieren nach außen gelocht, so muss der Butzen sicher entsorgt werden. Beim Lochen von innen nach außen befindet sich der Butzen nach dem Lochen in der Schneidmatrize. Diese kann in der oberen oder in der unteren Werkzeughälfte angeordnet sein. Je nachdem, wo sich Matrize und Butzen befinden, kann die Schwerkraft zum Entsorgen genutzt - oder die muss überwunden werden.If holes were punched outwards during calibration, the slug must be disposed of safely. When punching from the inside to the outside, the slug is in the cutting die after punching. This can be arranged in the upper or in the lower half of the mold. Depending on where the die and the slugs are located, gravity can be used for disposal - or it must be overcome.
Üblicherweise werden die Butzen durch Ausschwemmen aus dem Werkzeug entsorgt oder durch Umklappen der Butzen am Werkstück gelassen. Das Ausschwemmen führt dazu, dass man nicht überprüfen kann, ob alle Butzen entfernt wurden und der Prozess verlängert wird. Das Umklappen der Butzen macht eine Montage üblicherweise mit Schrauben oder Nieten unmöglich. Außerdem kann der Butzen nach der Montage abreissen, auch erhöht er unnötig das Gewicht.Usually, the slugs are disposed of by flushing out of the tool or left by folding the slugs on the workpiece. Wiping out will make it impossible to verify that all the slugs have been removed and the process is being lengthened. The folding over of the slugs usually makes mounting with screws or rivets impossible. In addition, the slug can tear off after assembly, it also unnecessarily increases the weight.
In Kenntnis dieses Standes der Technik hat sich der Erfinder das Ziel gesetzt, die erkannten Nachteile zu beseitigten sowie das eingangs beschriebene Verfahren und vor allem die Entsorgungsmöglichkeiten zu verbessern sowie eine Vorrichtung dafür zu schaffen.Knowing this prior art, the inventor has set the goal to eliminate the identified disadvantages and to improve the method described above and especially the disposal options and to provide a device for it.
Zur Lösung dieser Aufgabe führen die Lehren der unabhängigen Ansprüche 1, 2, 3 und 4; die Unteransprüche geben günstige Weiterbildungen an.To achieve this object, the teachings of independent claims 1, 2, 3 and 4; the dependent claims indicate favorable developments.
Erfindungsgemäß wird die Stirn des in dem als Führungsbohrung gestalteten Führungskanals der als Oberwerkzeug ausgebildeten Matrize geführten Lochstempels von der dem Werkstück anliegenden Matrizenfläche etwa um das Maß der Dicke des Werkstückes in die Führungsbohrung in Druckrichtung des Wirkmediums -- also gegen die Druckrichtung des Lochstempels -- eingezogen und der Butzen aus dem Werkstück durch den Innendruck nachgeführt, wonach der Lochstempel mit anliegendem Butzen in Druckrichtung des Wirkmediums von der Matrizenfläche weitergehend entfernt wird.According to the invention, the front end of the guide channel, which is designed as a guide bore of the punch die formed as an upper tool, is retracted by the amount of the thickness of the workpiece into the guide bore in the pressure direction of the active medium, ie against the pressure direction of the punch and the slug from the workpiece tracked by the internal pressure, after which the punch with adjacent slug in the printing direction of the active medium of the die surface is further removed.
Bei einer anderen Ausgestaltung mit Unterwerkzeug soll die Stirn des ebenfalls in jener Führungsbohrung geführten Lochstempels von der dem Werkstück anliegenden Matrizenfläche etwa um das Maß jener Dicke des Werkstückes gegen die Druckrichtung des Wirkmediums in das Werkstück eingerührt und mit ihm der Butzen in Abstand zur Matrizenfläche aus dem Werkstück gelöst werden, wonach Lochstempel und Butzen gegenläufig -- also nach Druckabbau und Öffnen des Werkzeuges in Druckrichtung -- geführt werden.In another embodiment with lower tool, the end of the punch also guided in that guide bore should be stirred by the workpiece adjacent die surface about the extent of that thickness of the workpiece against the printing direction of the active medium in the workpiece and with him the slug are released from the workpiece at a distance from the die surface, after which punches and slugs in opposite directions - ie after pressure reduction and opening the tool in the printing direction - are performed.
Nach dem Öffnen des Werkzeugs und Entfernen des Werkstücks ergeben sich zwei mögliche Situationen; der Butzen befindet sich
- in der oberen Werkzeughälfte oder
- in der unteren Werkzeughälfte.
- in the upper mold half or
- in the lower half of the mold.
Im erstgenannten Fall wird der Butzen einfach in eine in den Profilhohlraum, also vor die Matrize bzw. die den Butzen freigebende frische Ausnehmung, gefahrene Auffangeinrichtung durch einen Lochstempel ausgestoßen; der Butzen gelangt im freien Fall in eine Auffangwanne. Im zweiten Fall wird eine Absaugeinrichtung -- gegebenenfalls unterstützt durch eine Düse -- vor die Schneidmatrize gehalten, und der Lochstempel in der Schneidmatrize wird vorgefahren, wodurch der ausgestoßene Butzen sofort entsorgt wird.In the former case, the slug is simply ejected into a cavity in the profile, ie in front of the die or the fresh recess releasing the slug, driven catcher by a punch; the slug passes into a drip pan in free fall. In the second case, a suction device - possibly supported by a nozzle - held in front of the cutting die, and the punch in the cutting die is brought forward, whereby the ejected slug is disposed of immediately.
Die Butzenentsorgung ist in der beschriebenen Weise optimiert.The Butzenentsorgung is optimized in the manner described.
Die erfindungsgemäße Vorrichtung enthält für das Oberwerkzeug eine in den Profilhohlraum einfahrende Auffangwanne. Gemäß einer alternativen Lösung ist am Unterwerkzeug eine Saugeinrichtung vorgesehen, um den Butzen herauszuheben.The inventive device includes for the upper tool a retracting into the profile cavity sump. According to an alternative solution, a suction device is provided on the lower tool to lift out the slug.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt jeweils einen schematischen Teillängsschnitt durch eine an ein Werkstück angelegte Matrize mit sie durchgreifendem Lochstempel und zwar in
- Fig. 1:
- die Grundstellung des Lochstempels;
- Fig. 2, 4:
- den zum Herstellen eines Loches im Werkstück aus der Grundstellung verfahrenen Lochstempel bei einem sog. Oberwerkzeug und bei einem sog. Unterwerkzeug;
- Fig. 3, 5:
- die Stellung des Lochstempels zu Fig. 2 bzw. Fig. 4 nach vollständiger Materialtrennung;
- Fig. 6:
- eine Verfahrensschrittfolge mit dem Oberwerkzeug;
- Fig. 7:
- eine Verfahrensschrittfolge mit dem Unterwerkzeug.
- Fig. 1:
- the basic position of the punch;
- 2, 4:
- the method of producing a hole in the workpiece from the basic position moved punch in a so-called. Upper tool and a so-called. Lower tool;
- 3, 5:
- the position of the punch to Fig. 2 and Fig. 4 after complete separation of material;
- Fig. 6:
- a sequence of steps with the upper tool;
- Fig. 7:
- a step sequence with the lower tool.
Oberhalb eines flachen Bereiches eines nur teilweise wiedergegebenen rohrförmigen Werkstücks der Wanddicke abeispielsweise eines Wandabschnittes eines Hohlprofils 10, dessen Längsachse bei A angedeutet ist -- ist eine Oberfläche 12 einer Matrize 14 mit einer Führungsbohrung 16 für einen zylindrischen Lochstempel 18 mit Längsachse B zu erkennen. Dieses Werkstück 10 ist im Rahmen eines Innenhochdruck-Umformvorgangs auf seiner vom Lochstempel 18 abgekehrten Oberfläche 11 mit Hochdruck beaufschlagt.Above a flat region of a partially reproduced tubular workpiece, the wall thickness example of a wall portion of a
Um das der Matrizenoberfläche 12 anliegende Werkstück 10 zu lochen, wird bei einem Oberwerkzeug 14 gemäß Fig. 2 der Lochstempel 18 gegen dessen Druckrichtung x verfahren, so dass durch die Sternpelstirnfläche 20 ein dem Durchmesser d der Führungsbohrung 16 entsprechender Bereich des Werkstückes 10, welcher in diesem eine kreisrunde Ausnehmung 22 hinterläßt, als Butzen 24 ausgehoben wird. Fig. 3 verdeutlicht die vollständige Materialtrennung bei zunehmendem Abstand des Lochstempels 18 vom Werkstück 10.To punch the
Bei einem sog. Unterwerkzeug 14t nach Fig. 4,5 mit über ihm verlaufendem Werkstück 10 ist es auch möglich, den Butzen 24 durch Verschieben des Lochstempels 18 in Druckrichtung x halb anzuschneiden und dann die vollständige Materialtrennung durch den entgegengesetzten Hub des Lochstempels 18also gegen die Druckrichtung x -- in vorab beschriebener Weise zu erreichen.In a so-called.
Bei den in Fig. 6 nacheinander dargestellten Verfahrensschritten mit Oberwerkzeug 14 ist rechts wiedergegeben, dass der hier in der oberen Werkzeughälfte befindliche Butzen 24 nach dem Öffnen des Werkzeuges von einer in den Profilraum 26 eingefahrenen Auffangwanne 28 aufgenommen wird. Bei den Verfahrensschritten mit dem Unterwerkzeug 14t nach Fig. 7 findet sich der Butzen 24 in der unteren Werkzeughälfte und wird -- ebenfalls nach dem Öffnen des Werkzeuges -- aus der Ausnehmung 22 durch ein Sauggerät 30 abgesaugt. Nicht gezeigt ist eine dieses Vorgehen unterstützende Düse.In the process steps shown in succession in Fig. 6 with
Claims (6)
- Method of removing slugs (24) or similar waste material produced during a piercing operation from a workpiece (10) in the form of a hollow section subjected to high internal pressure generated by a fluid action medium, the nose (20) of a piercing punch (18) guided in a guide channel (16) of a die (14) being retracted from the surface (12) of the die bearing against the workpiece (10) in the guide channel (16) at a distance from the surface of the workpiece (10) and the slug (24) being fed out of the workpiece (10) by the internal pressure, after which the piercing punch (18) and the adjacent slug (24) are moved further away from the surface (12) of the die in the pressure direction of the action medium, characterised in that the nose (20) of the punch is first retracted into the guide channel in the form of a guide bore (16) against the pressure direction (x) of the piercing punch (18) approximately by the amount of the thickness (a) of the workpiece (10) and the slug (24) situated in the top half of the tool is fed to a collecting device (28) by the piercing punch (18) in the pressure direction (x) thereof.
- Method of removing slugs (24) or similar waste material produced during a piercing operation from a workpiece (10) in the form of a hollow section subjected to high internal pressure generated by a fluid action medium, the nose (20) of a piercing punch (18) guided in a guide channel (16) of a die (14) being moved from the surface (12) of the die bearing against the workpiece (10) in the guide channel (16) at a distance from the surface of the workpiece (10) and the slug (24) being fed out of the workpiece (10) by the internal pressure, characterised in that the nose (20) of the punch is first introduced into the workpiece (10) against the pressure direction of the action medium approximately by the amount of the thickness (a) of the workpiece (10) and the slug (24) is removed from the workpiece (10) therewith at a distance from the surface (12) of the die, after which the piercing punch (18) arranged in a guide bore (16) serving as the guide channel and the slug (24) are guided in the opposite direction. i.e. in the pressure direction (x), the slug (24) situated in the bottom half of the tool being lifted off the piercing punch (18), extracted by a suction device (30) and pressed out of its recess (22) by an ejector.
- Method according to claim 1, characterised in that the slug (24) is conveyed to the collecting device (28) by the force of gravity.
- Device for removing slugs (24) or similar waste material produced during a piercing operation from a workpiece (10) in the form of a hollow section subjected to high internal pressure generated by a fluid action medium, wherein the nose (20) of a piercing punch (18) guided in a guide channel (16) of a die (14) can be retracted from the surface (12) of the die bearing against the workpiece (10) in the guide channel (16) at a distance from the surface of the workpiece (10) and the slug (24) can be fed out of the workpiece (10) by the internal pressure, for carrying out the method according to claim 1, characterised in that the guide channel in the form of a guide bore (16) is arranged in a top die (14), that at least one collecting device (28) is associated with the piercing punch (18) guided in the guide bore (16) opposite the surface (12) of the die bearing against the workpiece (10) below the guide bore serving as the region (22) of the workpiece (10) releasing the slug (24), and that the collecting device is a collecting trough (28).
- Device for removing slugs (24) or similar waste material produced during a piercing operation from a workpiece (10) in the form of a hollow section subjected to high internal pressure generated by a fluid action medium, wherein the nose (20) of a piercing punch (18) guided in a guide channel (16) of a die (14) can be retracted from the surface (12) of the die bearing against the workpiece (10) in the guide channel (16) at a distance from the surface of the workpiece (10) and the slug (24) can be fed out of the workpiece (10) by the internal pressure, for carrying out the method according to claim 2, characterised in that the guide channel in the form of a guide bore (16) is arranged in a bottom die (14t), and that at least one suction device (30) is associated with the piercing punch (18) guided therein opposite the surface (12) of the die bearing against the workpiece (10) above the guide bore serving as the region (22) of the workpiece (10) releasing the slug (24).
- Device according to claim 4 or claim 5, characterised in that the collecting device (28) or the suction device can automatically be positioned in front of the recess (22) releasing the slug (24).
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19849132 | 1998-10-23 | ||
DE19849132 | 1998-10-23 | ||
DE19851328 | 1998-11-06 | ||
DE19851328 | 1998-11-06 | ||
DE19902634 | 1999-01-23 | ||
DE19902634A DE19902634A1 (en) | 1998-10-23 | 1999-01-23 | Method for removing a slug or the like Waste piece from a work piece, and device therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0995513A1 EP0995513A1 (en) | 2000-04-26 |
EP0995513B1 true EP0995513B1 (en) | 2006-02-22 |
Family
ID=27218765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990810930 Expired - Lifetime EP0995513B1 (en) | 1998-10-23 | 1999-10-13 | Method and device for removing a slug from an internal high-pressure forming tool |
Country Status (2)
Country | Link |
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EP (1) | EP0995513B1 (en) |
DE (1) | DE59913144D1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60321947D1 (en) | 2002-11-12 | 2008-08-14 | Magna Int Inc | METHOD FOR INNER HIGH PRESSURE FORMING OF AN ELEMENT WITH OPENINGS |
US7765906B2 (en) | 2004-12-15 | 2010-08-03 | Eizou Ueno | Method of forming through-hole and through-hole forming machine |
KR20120052377A (en) | 2009-08-05 | 2012-05-23 | 지아이. 디아이. 메카니카 에스.피.에이. | A method for obtaining an opening in a hollow-body member, and a hollow-body member provided with one or more openings obtained with said method |
CN113083996B (en) * | 2021-04-09 | 2022-07-05 | 东莞市鑫品模具有限公司 | Punching positioning device die |
CN117983728B (en) * | 2024-04-07 | 2024-06-21 | 力同铝业(广东)有限公司 | Environment-friendly aluminum profile stamping forming equipment and method thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322063C2 (en) * | 1993-07-02 | 1999-07-15 | Schaefer Hydroforming Gmbh | Method and device for cutting out a section of a wall of a hollow body produced by the hydroforming process |
US5398533A (en) * | 1994-05-26 | 1995-03-21 | General Motors Corporation | Apparatus for piercing hydroformed part |
US5816089A (en) * | 1996-11-26 | 1998-10-06 | Dana Corporation | Hydroforming apparatus having in-die hole piercing capabilities and a slug ejection system using hydroforming fluid |
DE19809519C1 (en) * | 1998-03-05 | 1999-07-01 | Daimler Chrysler Ag | Method of removal of core from pressure molded hollow workpiece |
-
1999
- 1999-10-13 DE DE59913144T patent/DE59913144D1/en not_active Expired - Fee Related
- 1999-10-13 EP EP19990810930 patent/EP0995513B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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DE59913144D1 (en) | 2006-04-27 |
EP0995513A1 (en) | 2000-04-26 |
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