EP1525927B1 - Combined punching and bending machine and machining process therefor - Google Patents

Combined punching and bending machine and machining process therefor Download PDF

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Publication number
EP1525927B1
EP1525927B1 EP03021065A EP03021065A EP1525927B1 EP 1525927 B1 EP1525927 B1 EP 1525927B1 EP 03021065 A EP03021065 A EP 03021065A EP 03021065 A EP03021065 A EP 03021065A EP 1525927 B1 EP1525927 B1 EP 1525927B1
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EP
European Patent Office
Prior art keywords
sheet metal
punching
forming
sheet
positions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP03021065A
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German (de)
French (fr)
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EP1525927A1 (en
Inventor
Peter Bytow
Christoph Hammer
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.)
Trumpf Werkzeugmaschinen SE and Co KG
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Trumpf Werkzeugmaschinen SE and Co KG
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Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to DE50305276T priority Critical patent/DE50305276D1/en
Priority to EP03021065A priority patent/EP1525927B1/en
Priority to AT03021065T priority patent/ATE341409T1/en
Priority to US10/943,159 priority patent/US7757372B2/en
Publication of EP1525927A1 publication Critical patent/EP1525927A1/en
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Publication of EP1525927B1 publication Critical patent/EP1525927B1/en
Anticipated expiration legal-status Critical
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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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations
    • 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
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5124—Plural diverse manufacturing apparatus including means for metal shaping or assembling with means to feed work intermittently from one tool station to another

Definitions

  • the present invention relates to a method of processing a metallic sheet by means of a combined punching / forming machine, the method comprising the steps of stamping the sheet by means of a punch, "forming" the sheet by means of a forming tool (eg a tool for producing beading, threading or gills), "changing" of forming and stamping tools and "smearing" of sheet metal positions to be formed.
  • a forming tool eg a tool for producing beading, threading or gills
  • the forming of sheets is generally carried out with a forming tool, which consists essentially of two mold halves (punch and die).
  • the mold halves are in contact with the sheet to be formed during the forming process, thereby exerting a force which causes the shape change of the sheet.
  • a relative movement between the sheet to be formed and the mold halves In this case arise when the sheet metal to be formed on the mold halves frictional forces, which are reduced by the application of lubricant to the sheet metal or the mold halves to be formed. Since then, only the upper die (punch) could be lubricated during the processing of the sheet, since the lower die (die) was covered by the sheet and therefore was not accessible. For this reason, hitherto, the sheet underside outside the forming machine was manually lubricated at the processing positions to be formed, which was associated with high expenditure of time and an environmental impact by over-lubrication.
  • This object is achieved by a machining method in which the lubrication by means of a laterally offset to the respective substitute punching or forming tool arranged spraying are applied to the plate and at least at a sheet position between "smearing” and “forming” this sheet metal position at least one processing step in a different position.
  • a lubricant e.g. an air-oil mixture
  • a lubricant e.g. an air-oil mixture
  • the sequence of all processing steps is chosen so that the total processing time is as short or time-optimized and in particular shorter than in the case in which immediately after "smearing" a sheet metal position, this sheet metal position is transformed.
  • the method also includes the processing step "smearing" of sheet metal positions to be punched, at least one processing step is preferably carried out at a different position at least at a sheet metal position between "smearing” and “punching” this sheet metal position.
  • the sequence of all processing steps is chosen so that the total processing time is as short or time-optimized and in particular shorter than in the case in which immediately after "smearing" a sheet metal position, this sheet metal position is punched.
  • a limited number of transformations or punching of non-lubricated sheet metal positions is carried out between the forming or punching of two lubricated sheet metal positions in order to optimize the number of lubrications. For example, it may be sufficient to lubricate only every second or third forming or punching.
  • the combined punching / forming machine 1 shown in Fig. 1 comprises exchangeable stamping and forming dies for processing a sheet 2 which is moved in the machine 1 at the place of work of each substitute punching or forming tool 3 over, as indicated by a double arrow 4 is.
  • the punching or forming tool 3 consists respectively of upper and lower punching or forming tools 3a, 3b, between which the sheet 2 is arranged.
  • the stationary receptacle for the lower punching or forming tool (die) 3b is designated.
  • the forming tool is used for example for generating beads, thread passages or gills.
  • a stationary spraying device 6 with a spray nozzle 7 is arranged laterally on the underside of the sheet 2, a lubrication 8 , for example an oil stain, with to spray on a diameter b .
  • the spray device 6 is connected via an electrically operable 2/2-way valve 9 with a pressurized oil reservoir 10 . By energizing the valve 9 oil passes under pressure to the spray nozzle 7 and is mixed there at the nozzle outlet with an air stream and sprayed onto the sheet 2.
  • This air-oil mixture is sprayed at a distance to the working place of the substituted lower punching or forming tool 3b on a sheet metal position to be formed, and in the further course of processing this lubricated sheet metal position is driven to the punching or forming tool 3 for processing.
  • FIG. 2 four processing positions P1 to P4 are shown on the sheet 2 by way of example, to be processed with the combined punching / forming machine 1.
  • the positions P1, P4 are to be punched with a first punching tool and formed with a first forming tool and the positions P2, P3 punched with a second punching tool and formed with a second forming tool.
  • the order of all processing steps is chosen so that the total processing time is as short as possible.
  • the fastest achievable next sheet metal position is determined based on the current sheet metal position (starting position).
  • the time required for repositioning is calculated from the travel distance and acceleration along the travel axes.
  • the sheet metal positions available for selection for the next sheet metal position may vary.
  • the diameter b of the sprayed point lubrication 8 is e.g. 30 mm. If larger areas or longer tracks, e.g. For a Nibbelbearbeitung be lubricated, the sheet is moved accordingly during the spraying process.
  • the processing steps required for processing the sheet 2 are shown in a flowchart, wherein the order of the processing steps is optimized with regard to the shortest possible total processing time.
  • the sheet 2 is moved until this sheet metal position is arranged above the spray nozzle 7.
  • the sheet 2 is moved until this sheet metal position is arranged in the tool 3 accordingly.
  • the individual processing steps are implemented in a control unit (computer) of the machine 1 controlling the method and processing of the sheet metal as a machining program (computer program or software).
  • the sheet position P1 is lubricated and punched with the first punching tool, followed by "smearing” the sheet position P2.
  • the sheet position P4 is lubricated and punched with the first punch, followed by "smearing” the sheet position P3.
  • the sheet metal positions P3, P2 are punched with the second punching tool.
  • the sheet position P1 is lubricated and reformed, followed by "smearing” of the sheet position P2.
  • the sheet position P4 is lubricated and lubricated with the first forming die and formed, followed by "smearing” the sheet position P3.
  • sheet metal positions P3, P2 are punched with the second forming tool.
  • a dead zone is created on one side of the sheet which can not be lubricated. If machining operations are to be lubricated in this dead zone, machining can always be carried out alternately in the lubricatable and non-lubricatable regions. This ensures that there is still a sufficient lubricating film on the tool from the last lubricated machining.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)

Abstract

The method consists of punching, forming, and tool change stages, and a lubrication stage for plate positions. Lubricant (8) is sprayed on the plate (2) to processed, esp. on its underside, by a spray device, which is positioned offset relative to the punch/forming tool in use at the time. In at least one plate position, between lubrication and forming/punching stages, at least one further processing stage in a different position is carried out. All processing stages not requiring a tool change, are carried out in sequence. The punching/forming machine (1) has interchangeable punching/forming tools (3) and a lubricant spray device (6) positioned below the plate. The machine is controlled by a computer program.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Bearbeiten eines metallischen Flachmaterials (Blech) mittels einer kombinierten Stanz-/Umformmaschine, wobei das Verfahren die Bearbeitungsschritte "Stanzen" des Blechs mittels eines Stanzwerkzeugs, "Umformen" des Blechs mittels eines Umformwerkzeugs (z.B. eines Werkzeugs zum Erzeugen von Sicken, Gewindedurchzügen oder Kiemen), "Wechseln" von Umform- und Stanzwerkzeugen und "Schmieren" von umzuformenden Blechpositionen umfasst.The present invention relates to a method of processing a metallic sheet by means of a combined punching / forming machine, the method comprising the steps of stamping the sheet by means of a punch, "forming" the sheet by means of a forming tool (eg a tool for producing beading, threading or gills), "changing" of forming and stamping tools and "smearing" of sheet metal positions to be formed.

Die Umformung von Blechen erfolgt in der Regel mit einem Umformwerkzeug, das im Wesentlichen aus zwei Formwerkzeughälften (Stempel und Matrize) besteht. Die Formwerkzeughälften befinden sich während der Umformung in Kontakt mit dem umzuformenden Blech und üben dabei eine Kraft aus, welche die Formänderung des Blechs bewirkt. Während der Umformung kommt es zu einer Relativbewegung zwischen dem umzuformenden Blech und den Formwerkzeughälften. Dabei entstehen bei Anlage des umzuformenden Blechs an den Formwerkzeughälften Reibungskräfte, die durch das Auftragen von Schmiermittel auf das umzuformende Blech oder die Formwerkzeughälften vermindert werden. Seither konnte während der Bearbeitung des Blechs nur das obere Formwerkzeug (Stempel) geschmiert werden, da das untere Formwerkzeugs (Matrize) durch das Blech abgedeckt wurde und daher nicht zugänglich war. Aus diesem Grund wurde bisher die Blechunterseite außerhalb der Umformmaschine an den umzuformenden Bearbeitungspositionen manuell geschmiert, was mit hohem Zeitaufwand und einer Umweltbelastung durch Überschmierung verbunden war.The forming of sheets is generally carried out with a forming tool, which consists essentially of two mold halves (punch and die). The mold halves are in contact with the sheet to be formed during the forming process, thereby exerting a force which causes the shape change of the sheet. During the forming, there is a relative movement between the sheet to be formed and the mold halves. In this case arise when the sheet metal to be formed on the mold halves frictional forces, which are reduced by the application of lubricant to the sheet metal or the mold halves to be formed. Since then, only the upper die (punch) could be lubricated during the processing of the sheet, since the lower die (die) was covered by the sheet and therefore was not accessible. For this reason, hitherto, the sheet underside outside the forming machine was manually lubricated at the processing positions to be formed, which was associated with high expenditure of time and an environmental impact by over-lubrication.

Aus der DE-U-295 07 141 ist ein Verfahren zum Bearbeiten eines Blechs mittels einer Stanzmaschine bekannt, wobei das Verfahren die Bearbeitungsschritte "Stanzen" des Blechs mittels eines Stanzwerkzeugs und "Auftragen von Material bzw. Beschichtungen" auf das Blech mittels einer seitlich versetzt zum Stanzwerkzeug angeordneten Sprüheinrichtung umfasst. Bei diesen Beschichtungen handelt es sich um dauerhafte Beschichtungen des Blechs, wie z.B. Klebstoff-, Dämmstoff-, Dichtflächen- oder Verschleißschutz-Beschichtungen, die zeitgleich zum Stanzen aufgebracht werden.From DE-U-295 07 141 a method for processing a sheet by means of a punching machine is known, wherein the method, the processing steps "punching" of the sheet by means of a punching tool and "application of material These coatings are permanent coatings of the sheet, such as adhesive, insulation, sealing surface or wear protection coatings that are applied at the same time for punching ,

Demgegenüber ist es die Aufgabe der vorliegenden Erfindung, ein Bearbeitungsverfahren der eingangs genannten Art dahingehend weiterzubilden, dass die Schmierung während der Bearbeitung auf das Blech aufgetragen werden kann bzw. dass die Bearbeitung zeitoptimiert ausgeführt wird.In contrast, it is the object of the present invention to further develop a machining method of the type mentioned in that the lubrication can be applied during processing on the sheet or that the processing is performed time-optimized.

Diese Aufgabe wird erfindungsgemäß durch ein Bearbeitungsverfahren gelöst, bei dem die Schmierungen mittels einer seitlich versetzt zum jeweils eingewechselten Stanz- bzw. Umformwerkzeug angeordneten Sprüheinrichtung auf das Blech aufgetragen werden und zumindest an einer Blechposition zwischen "Schmieren" und "Umformen" dieser Blechposition mindestens ein Bearbeitungsschritt an einer anderen Position ausgeführt wird.This object is achieved by a machining method in which the lubrication by means of a laterally offset to the respective substitute punching or forming tool arranged spraying are applied to the plate and at least at a sheet position between "smearing" and "forming" this sheet metal position at least one processing step in a different position.

Erfindungsgemäß wird ein Schmiermittel, z.B. ein Luft-Ölgemisch, im Abstand zum Arbeitsort des Umformwerkzeugs auf eine umzuformende Blechposition aufgesprüht und anschließend diese geschmierte Blechposition zum Bearbeitungswerkzeug gefahren. Dabei wird die Reihenfolge aller Bearbeitungsschritte so gewählt, dass die Gesamtbearbeitungszeit möglichst kurz bzw. zeitoptimiert ist und insbesondere kürzer ist als in dem Fall, bei dem unmittelbar nach "Schmieren" einer Blechposition diese Blechposition umgeformt wird.According to the invention, a lubricant, e.g. an air-oil mixture, sprayed at a distance to the working location of the forming tool to a sheet metal position to be formed and then moved this lubricated sheet metal position to the machining tool. The sequence of all processing steps is chosen so that the total processing time is as short or time-optimized and in particular shorter than in the case in which immediately after "smearing" a sheet metal position, this sheet metal position is transformed.

Wenn das Verfahren auch den Bearbeitungsschritt "Schmieren" von zu stanzenden Blechpositionen umfasst, wird vorzugsweise zumindest an einer Blechposition zwischen "Schmieren" und "Stanzen" dieser Blechposition mindestens ein Bearbeitungsschritt an einer anderen Position ausgeführt. Dabei wird die Reihenfolge aller Bearbeitungsschritte so gewählt, dass die Gesamtbearbeitungszeit möglichst kurz bzw. zeitoptimiert und insbesondere kürzer ist als in dem Fall, bei dem unmittelbar nach "Schmieren" einer Blechposition diese Blechposition gestanzt wird.If the method also includes the processing step "smearing" of sheet metal positions to be punched, at least one processing step is preferably carried out at a different position at least at a sheet metal position between "smearing" and "punching" this sheet metal position. The sequence of all processing steps is chosen so that the total processing time is as short or time-optimized and in particular shorter than in the case in which immediately after "smearing" a sheet metal position, this sheet metal position is punched.

Bevorzugt wird zwischen dem Umformen bzw. Stanzen zweier geschmierter Blechpositionen eine begrenzte Anzahl an Umformungen bzw. Stanzungen nichtgeschmierter Blechpositionen ausgeführt, um die Anzahl an Schmierungen zu optimieren. So kann es beispielsweise ausreichend sein, nur jede zweite oder dritte Umformung bzw. Stanzung zu schmieren.Preferably, a limited number of transformations or punching of non-lubricated sheet metal positions is carried out between the forming or punching of two lubricated sheet metal positions in order to optimize the number of lubrications. For example, it may be sufficient to lubricate only every second or third forming or punching.

Um die Verschmutzung der Maschine durch Schmiermittel gering zu halten, sollte zwischen Schmierung und der zugehörigen Umformung bzw. Stanzung nur eine begrenzte Anzahl an Umpositionierung erfolgen. Daher wird bevorzugt zwischen "Schmieren" und "Umformen" bzw. "Stanzen" der gleichen Blechposition nur eine begrenzte Anzahl an Bearbeitungsschritten an anderen Positionen ausgeführt.In order to minimize the contamination of the machine by lubricants, only a limited number of repositioning should take place between lubrication and the associated forming or punching. Therefore, it is preferable to perform only a limited number of processing steps at other positions between "smearing" and "forming" or "punching" the same sheet metal position.

Von Vorteil ist es, wenn jeweils alle Bearbeitungsschritte, die ohne Werkzeugwechsel möglich sind, nacheinander ausgeführt werden und wenn eine Blechposition erst nach Aufbringen einer Schmierung umgeformt bzw. gestanzt wird.It is advantageous if in each case all processing steps that are possible without tool change, are performed sequentially and if a sheet metal position is formed or punched after applying lubrication.

In der Regel wird als nächste zu bearbeitende Blechposition diejenige ausgewählt, die ausgehend von der aktuellen Blechposition am schnellsten zu erreichen ist, möglichst unter Berücksichtigung folgender Randbedingungen:

  • (a) Nur solche Blechpositionen stehen zur Auswahl, die ohne Werkzeugwechsel bearbeitet werden können;
  • (b) Blechpositionen stehen zum Umformen bzw. Stanzen erst zur Auswahl, wenn sie zuvor geschmiert worden sind.
As a rule, the next sheet metal position to be machined is selected to be the one that can be reached most quickly starting from the current sheet metal position, if possible taking into account the following boundary conditions:
  • (a) Only those sheet metal positions are available that can be machined without tool change;
  • (b) Sheet metal positions are available for forming or punching only when they have been previously lubricated.

Es ist aber auch möglich, Schmierpositionen einer nächsten Bearbeitung (nach Werkzeugwechsel) oder sogar alle Schmierpositionen, die im Laufe der gesamten Abarbeitung des Blechs auftreten, als nächste zu bearbeitende Blechpositionen auszuwählen.However, it is also possible to select lubrication positions of a next machining (after tool change) or even all lubrication positions which occur during the entire machining of the metal sheet as the next sheet metal positions to be machined.

Weitere Vorteile der Erfindung ergeben sich aus der Beschreibung und der Zeichnung. Die gezeigten und beschriebenen Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter für die Schilderung der Erfindung.Further advantages of the invention will become apparent from the description and the drawings. The embodiments shown and described are not as an exhaustive enumeration, but rather have exemplary character for the description of the invention.

Es zeigen:

Fig. 1
die erfindungsgemäße kombinierte Stanz-/Umformmaschine in einer schematischen Seitenansicht;
Fig. 2
die Draufsicht auf ein Blech, das an verschiedenen Positionen bearbeitet werden soll; und
Fig. 3
ein beispielhaftes Ablaufdiagramm für die Bearbeitung des in Fig. 2 gezeigten Blechs mittels der erfindungsgemäßen Stanz-/Umformmaschine.
Show it:
Fig. 1
the combined punching / forming machine according to the invention in a schematic side view;
Fig. 2
the top view of a sheet to be processed at different positions; and
Fig. 3
an exemplary flow chart for the processing of the sheet shown in Fig. 2 by means of the punching / forming machine according to the invention.

Die in Fig. 1 gezeigte kombinierte Stanz-/Umformmaschine 1 umfasst wechselbare Stanz- und Umformwerkzeuge zum Bearbeiten eines Blechs 2, das in der Maschine 1 am Arbeitsort des jeweils eingewechselten Stanz- bzw. Umformwerkzeugs 3 vorbei verfahren wird, wie durch einen Doppelpfeil 4 angedeutet ist. Das Stanz- bzw. Umformwerkzeug 3 besteht jeweils aus oberen und unteren Stanz- bzw. Umformwerkzeugen 3a, 3b, zwischen denen das Blech 2 angeordnet ist. Mit 5 ist die ortsfeste Aufnahme für das untere Stanz- bzw. Umformwerkzeug (Matrize) 3b bezeichnet. Das Umformwerkzeug dient beispielsweise zum Erzeugen von Sicken, Gewindedurchzügen oder Kiemen.The combined punching / forming machine 1 shown in Fig. 1 comprises exchangeable stamping and forming dies for processing a sheet 2 which is moved in the machine 1 at the place of work of each substitute punching or forming tool 3 over, as indicated by a double arrow 4 is. The punching or forming tool 3 consists respectively of upper and lower punching or forming tools 3a, 3b, between which the sheet 2 is arranged. With 5 , the stationary receptacle for the lower punching or forming tool (die) 3b is designated. The forming tool is used for example for generating beads, thread passages or gills.

Im Abstand a (z.B. 100 mm) zur Mitte des unteren Stanz- bzw. Umformwerkzeug 3b ist seitlich neben der Aufnahme 5 eine ortsfeste Sprüheinrichtung 6 mit einer Sprühdüse 7 angeordnet, um auf die Unterseite des Blechs 2 eine Schmierung 8, z.B. einen Ölfleck, mit einem Durchmesser b aufzusprühen. Die Sprüheinrichtung 6 ist über ein elektrisch betätigbares 2/2-Wege-Ventil 9 mit einem unter Druck stehenden Ölbehälter 10 verbindbar. Durch Bestromen des Ventils 9 gelangt Öl unter Druck zur Sprühdüse 7 und wird dort am Düsenausgang mit einem Luftstrom vermischt und auf das Blech 2 gesprüht. Dieses Luft-Ölgemisch wird im Abstand a zum Arbeitsort des eingewechselten unteren Stanz- bzw. Umformwerkzeugs 3b auf eine umzuformende Blechposition aufgesprüht, und im weiteren Bearbeitungsverlauf wird diese geschmierte Blechposition zum Stanz- bzw. Umformwerkzeug 3 zur Bearbeitung gefahren.At a distance a (eg 100 mm) to the center of the lower punching or forming tool 3b, a stationary spraying device 6 with a spray nozzle 7 is arranged laterally on the underside of the sheet 2, a lubrication 8 , for example an oil stain, with to spray on a diameter b . The spray device 6 is connected via an electrically operable 2/2-way valve 9 with a pressurized oil reservoir 10 . By energizing the valve 9 oil passes under pressure to the spray nozzle 7 and is mixed there at the nozzle outlet with an air stream and sprayed onto the sheet 2. This air-oil mixture is sprayed at a distance to the working place of the substituted lower punching or forming tool 3b on a sheet metal position to be formed, and in the further course of processing this lubricated sheet metal position is driven to the punching or forming tool 3 for processing.

In Fig. 2 sind auf dem Blech 2 beispielhaft vier Bearbeitungspositionen P1 bis P4 gezeigt, die mit der kombinierten Stanz/Umformmaschine 1 bearbeitet werden sollen. Die Positionen P1, P4 sollen mit einem ersten Stanzwerkzeug gestanzt und mit einem ersten Umformwerkzeug umgeformt und die Positionen P2, P3 mit einem zweiten Stanzwerkzeug gestanzt und mit einem zweiten Umformwerkzeug umgeformt werden. Die Reihenfolge aller Bearbeitungsschritte wird so gewählt, dass die Gesamtbearbeitungszeit so kurz wie möglich ist. Im Rahmen dieser Optimierung wird ausgehend von der aktuellen Blechposition (Startposition), die am schnellsten erreichbare nächste Blechposition ermittelt. Die Zeit, die zur Umpositionierung benötigt wird, wird aus Verfahrweg und Beschleunigung entlang der Verfahrachsen berechnet. Die zur Auswahl für die nächste Blechposition stehenden Blechpositionen können unterschiedlich sein. Normalerweise stehen nur Blechpositionen zur Auswahl, die ohne Werkzeugwechsel erfolgen können. Blechpositionen, die zuvor eine Schmierung erfordern, stehen erst zur Auswahl, wenn die Schmierung dieser Blechposition erfolgt ist. Auch Schmierpositionen einer nächsten Bearbeitung (nach Werkzeugwechsel) oder sogar alle Schmierpositionen, die im Laufe der gesamten Bearbeitung des Blechs auftreten, können zur Auswahl stehen.In FIG. 2, four processing positions P1 to P4 are shown on the sheet 2 by way of example, to be processed with the combined punching / forming machine 1. The positions P1, P4 are to be punched with a first punching tool and formed with a first forming tool and the positions P2, P3 punched with a second punching tool and formed with a second forming tool. The order of all processing steps is chosen so that the total processing time is as short as possible. Within the scope of this optimization, the fastest achievable next sheet metal position is determined based on the current sheet metal position (starting position). The time required for repositioning is calculated from the travel distance and acceleration along the travel axes. The sheet metal positions available for selection for the next sheet metal position may vary. Normally only sheet metal positions are available, which can be done without tool change. Sheet metal positions that previously require lubrication are not available until lubrication of this sheet metal position has occurred. Also, lubrication positions of a next machining (after tool change) or even all lubrication positions that occur during the entire machining of the sheet can be available for selection.

Der Durchmesser b der aufgesprühten punktförmigen Schmierung 8 beträgt z.B. 30 mm. Sollen größere Flächen oder längere Bahnen, z.B. für eine Nibbelbearbeitung, geschmiert werden, wird das Blech während des Sprühvorgangs entsprechend verfahren.The diameter b of the sprayed point lubrication 8 is e.g. 30 mm. If larger areas or longer tracks, e.g. For a Nibbelbearbeitung be lubricated, the sheet is moved accordingly during the spraying process.

In Fig. 3 sind die zur Bearbeitung des Blechs 2 erforderlichen Bearbeitungsschritte in einem Ablaufdiagramm dargestellt, wobei die Reihenfolge der Bearbeitungsschritte im Hinblick auf eine möglichst kurze Gesamtbearbeitungszeit optimiert ist. Zum Schmieren einer Blechposition wird das Blech 2 verfahren, bis diese Blechposition oberhalb der Sprühdüse 7 angeordnet ist. Zum Stanzen und Umformen einer Blechposition wird das Blech 2 verfahren, bis diese Blechposition im Werkzeug 3 entsprechend angeordnet ist. Die einzelnen Bearbeitungsschritte sind in einer das Verfahren und Bearbeiten des Blechs steuernden Steuereinheit (Computer) der Maschine 1 als Bearbeitungsprogramm (Computerprogramm bzw. Software) implementiert. 3 , the processing steps required for processing the sheet 2 are shown in a flowchart, wherein the order of the processing steps is optimized with regard to the shortest possible total processing time. For smearing a sheet position, the sheet 2 is moved until this sheet metal position is arranged above the spray nozzle 7. For punching and forming a sheet metal position, the sheet 2 is moved until this sheet metal position is arranged in the tool 3 accordingly. The individual processing steps are implemented in a control unit (computer) of the machine 1 controlling the method and processing of the sheet metal as a machining program (computer program or software).

Zunächst wird bei eingebautem ersten Stanzwerkzeug die Blechposition P1 geschmiert und mit dem ersten Stanzwerkzeug gestanzt, gefolgt vom "Schmieren" der Blechposition P2. Dann wird die Blechposition P4 geschmiert und mit dem ersten Stanzwerkzeug gestanzt, gefolgt vom "Schmieren" der Blechposition P3. Nach dem Werkzeugwechsel auf das zweite Stanzwerkzeug werden die Blechpositionen P3, P2 mit dem zweiten Stanzwerkzeug gestanzt. Nach dem Werkzeugwechsel auf das erste Umformwerkzeug wird die Blechposition P1 geschmiert und umgeformt, gefolgt vom "Schmieren" der Blechposition P2. Dann wird die Blechposition P4 geschmiert und mit dem ersten Umformwerkzeug geschmiert und umgeformt, gefolgt vom "Schmieren" der Blechposition P3. Nach dem Werkzeugwechsel auf das zweite Umformwerkzeug werden die Blechpositionen P3, P2 mit dem zweiten Umformwerkzeug gestanzt.First, with the first punching tool installed, the sheet position P1 is lubricated and punched with the first punching tool, followed by "smearing" the sheet position P2. Then, the sheet position P4 is lubricated and punched with the first punch, followed by "smearing" the sheet position P3. After the tool change to the second punching tool, the sheet metal positions P3, P2 are punched with the second punching tool. After the tool change to the first forming tool, the sheet position P1 is lubricated and reformed, followed by "smearing" of the sheet position P2. Then, the sheet position P4 is lubricated and lubricated with the first forming die and formed, followed by "smearing" the sheet position P3. After the tool change to the second forming tool sheet metal positions P3, P2 are punched with the second forming tool.

Durch die von der Stanz- bzw. Umformmitte um a beabstandeten Position der Sprühdüse 7 entsteht auf einer Seite des Blechs ein Totbereich, der nicht geschmiert werden kann. Sollen in diesem Totbereich Bearbeitungen geschmiert werden, so kann immer abwechselnd im schmierbaren und im nicht schmierbaren Bereich eine Bearbeitung durchgeführt werden. Hierdurch wird gewährleistet, dass von der letzten geschmierten Bearbeitung noch ein ausreichender Schmierfilm auf dem Werkzeug vorhanden ist.As a result of the position of the spray nozzle 7 which is at a distance from the punching or forming center by a, a dead zone is created on one side of the sheet which can not be lubricated. If machining operations are to be lubricated in this dead zone, machining can always be carried out alternately in the lubricatable and non-lubricatable regions. This ensures that there is still a sufficient lubricating film on the tool from the last lubricated machining.

Claims (7)

  1. Method for processing a sheet metal (2) using a combined punching/forming machine (1), wherein the method comprises the processing steps of "punching" the sheet metal (2) using a punching tool (3), "forming" the sheet metal (2) using a forming tool (3), "changing" forming and punching tools (3) and "lubricating" sheet positions (P1-P4) to be formed,
    characterized in that the lubricants (8) are sprayed onto the sheet metal (2), in particular onto the lower side of the sheet metal, using a spray device (6) which is disposed at a lateral distance from the respectively mounted punching or forming tool (3), and, at least at one sheet metal position (P2) between "lubricating" and "forming" of this sheet metal position (P2), at least one processing step is carried out at another position.
  2. Method according to claim 1, characterized in that the method also comprises the processing step of "lubricating" of sheet metal positions (P1-P4) to be punched and, at least at one sheet metal position (P2) between "lubricating" and "punching" of this sheet metal position (P2), at least one processing step is carried out at another position.
  3. Method according to claim 1 or 2, characterized in that between forming or punching of two lubricated sheet metal positions, only a limited number of forming processes of non-lubricated sheet metal positions are carried out.
  4. Method according to any one of the preceding claims, characterized in that, between "lubricating" and "forming or "punching" of the same sheet metal position (P2), only a limited number of processing steps are carried out at other positions.
  5. Method according to any one of the preceding claims, characterized in that all processing steps which can be carried out without changing tools, are performed subsequently.
  6. Method according to any one of the preceding claims, characterized in that a sheet metal position is formed or punched only after application of lubricant (8).
  7. Method according to any one of the preceding claims, characterized in that the sheet metal position which can be reached within the shortest time from the current sheet metal position, is selected as the next sheet metal position to be processed.
EP03021065A 2003-09-18 2003-09-18 Combined punching and bending machine and machining process therefor Expired - Lifetime EP1525927B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50305276T DE50305276D1 (en) 2003-09-18 2003-09-18 Combined punching / forming machine and processing method therefor
EP03021065A EP1525927B1 (en) 2003-09-18 2003-09-18 Combined punching and bending machine and machining process therefor
AT03021065T ATE341409T1 (en) 2003-09-18 2003-09-18 COMBINED PUNCHING/FORMING MACHINE AND PROCESSING PROCESS THEREOF
US10/943,159 US7757372B2 (en) 2003-09-18 2004-09-17 Sheet metal processing methods utilizing a combined punching and forming machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03021065A EP1525927B1 (en) 2003-09-18 2003-09-18 Combined punching and bending machine and machining process therefor

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EP1525927A1 EP1525927A1 (en) 2005-04-27
EP1525927B1 true EP1525927B1 (en) 2006-10-04

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EP (1) EP1525927B1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016004959B4 (en) 2016-04-23 2018-05-09 Audi Ag Forming tool for forming metal or non-metal materials
CN108080498B (en) * 2017-11-04 2019-09-10 滁州市新康达金属制品有限公司 A kind of household electrical appliances punching production technique

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US2313525A (en) 1941-10-09 1943-03-09 Western Electric Co Article forming apparatus
US3584487A (en) * 1969-01-16 1971-06-15 Arne H Carlson Precision forming of titanium alloys and the like by use of induction heating
US3756051A (en) * 1972-03-22 1973-09-04 Budd Co Lubricating system for metal forming die
US4400965A (en) * 1980-03-27 1983-08-30 Modine Manufacturing Company Forming integral flanges in a sheet apparatus therefore
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Publication number Publication date
EP1525927A1 (en) 2005-04-27
ATE341409T1 (en) 2006-10-15
DE50305276D1 (en) 2006-11-16
US7757372B2 (en) 2010-07-20
US20050107891A1 (en) 2005-05-19

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