EP3235593B1 - Outil de façonnage pour la coupe de materiaux - Google Patents

Outil de façonnage pour la coupe de materiaux Download PDF

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Publication number
EP3235593B1
EP3235593B1 EP17000578.9A EP17000578A EP3235593B1 EP 3235593 B1 EP3235593 B1 EP 3235593B1 EP 17000578 A EP17000578 A EP 17000578A EP 3235593 B1 EP3235593 B1 EP 3235593B1
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EP
European Patent Office
Prior art keywords
engagement contour
suction
cutting
tool insert
opening
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.)
Active
Application number
EP17000578.9A
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German (de)
English (en)
Other versions
EP3235593A1 (fr
Inventor
Robert Canti
Wilfried VETTE
Emmanuel Conter
Jörg Schneid
Rafael Dreier
Stefan Sanhieter
Christian Disch
Ludwig Schaller
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.)
Audi AG
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Audi AG
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Publication date
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Publication of EP3235593A1 publication Critical patent/EP3235593A1/fr
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Publication of EP3235593B1 publication Critical patent/EP3235593B1/fr
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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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action

Definitions

  • the invention relates to a shaping tool for cutting metal or non-metal materials with at least one base body on which at least one tool insert with an engagement contour is arranged.
  • Shaping tools are used to perform cutting processes on metal or non-metal materials. These shaping tools are used for the production of small, but in particular large sheet metal components of a vehicle. As a rule, thin-walled starting materials such as sheet steel or sheet aluminum are used, with special shaping tools being required for each individual body part.
  • the shaping tools include tool inserts with an engagement contour for realizing the cutting processes and are manufactured as separate components and connected to a base body, which can be a lower tool part, an upper tool part or a slide.
  • tinsel When cutting sheet metal, especially when cutting sheets made of aluminum alloys, so-called tinsel is created.
  • a forming tool as a dividing tool in which flakes are extracted through channels integrated into the tool.
  • a punch and a hold-down device are moved relative to a die, a workpiece being clamped between the hold-down device and the die and then divided.
  • suction openings are provided in the die as well as in the punch below the hold-down device, which are connected to suction channels in the die, in the punch and the hold-down device.
  • suction channels are connected on the outside to a common discharge line.
  • a vacuum in the area of the suction openings is provided by means of a vacuum pump which is installed in the discharge line.
  • a disadvantage of this suction device for flakes is that the entire tool needs to be sealed in order to achieve the necessary suction power in the area of the cutting edges of the tool.
  • a device for trimming molded parts by means of a deep-drawing press for body parts which is equipped with a cutting knife with a suction device designed as a Venturi nozzle for suctioning off material particles produced during trimming.
  • This Venturi nozzle comprises a suction channel opening adjacent to the cutting edge, a supply channel that can be acted upon by compressed air, and a discharge channel for material particles.
  • a Venturi nozzle cannot always be integrated.
  • a tool base of a punch press tool comprises according to FIG JP 2005 014034 A a die body with a die tip held therein. Slit-shaped openings are arranged around the die tip and open into a die channel of the die body running axially below the die tip. This die channel continues as an axial discharge channel through the tool base to its lower end. In order to discharge the flakes produced during the punching and embossing of a thin and plate-like workpiece via this discharge channel, a vacuum pump using the Coanda effect is provided in the area of the same.
  • the DE 10 2014 200 198 A1 describes a device for the machining of a metallic component, with which, with the machining of a surface of the metallic component exposed to wear, the wear on the surface is reduced without the application of a coating.
  • a closed, vacuum-compatible housing is used to accommodate part of the surface to be machined of the metallic component, the vacuum-compatible housing being fluidically connected to a vacuum generating means for generating a low-oxygen environment in the vacuum-compatible housing.
  • the metallic component is made of an iron-based material
  • the negative pressure inside the housing which is suitable for negative pressure, leads to a lowering of the oxygen content and reduces the formation of the iron oxide Fe 2 O 3 .
  • the wear-reducing oxide Fe 3 O 4 is formed.
  • a punching device for punching large sheet metal parts, such as a body side wall in which with the punching out of the outer contour of such a sheet metal part, the resulting waste is also divided by means of a cutting device with two shear blades.
  • a circular suction tube is arranged in the area of the lower cutting edge of the cutting device.
  • the JP H11 151537 A describes a punching device with a suction device in the area of lower cutting edges with a trumpet-like opening.
  • the EP 0 958 092 B1 a milling device for milling the welding area of welded sheet metal parts, which has a vacuum pump for sucking off chips generated during milling.
  • vacuum pumps are proposed which use the Coanda effect or the Bernoulli effect to generate a negative pressure.
  • a vacuum is generated by means of an air flow guided through a flow channel 11 of a tubular pump body 10.1.
  • this flow channel 11 begins with an inlet opening 12 with an inlet cross-sectional area which tapers conically in the axial direction of the pump body 10.1 to a cross-sectional constriction 13 with a minimal passage area.
  • annular gap 14 is fed with compressed air 16 from an annular chamber 15 which is under overpressure.
  • the air entering the flow channel 11 from the annular chamber 15 through the annular gap 14 and flowing along the widening wall of the flow channel 11 due to the Coanda effect causes an air flow in the flow channel 11 that breaks the air lying in front of the gap 14 in the axial direction L1 sucks in and carries away.
  • the outlet air flow L2 can be regulated solely by changing the annular gap 14 and the pressure of the compressed air 16. In particular, with such a vacuum pump 10 it is possible to achieve a high pumping speed with low air consumption.
  • the shaping tool has a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.
  • the suction nozzle is arranged on the cutting knife with respect to a cutting surface of the cutting knife opposite the cutting edge in such a way that the nozzle opening is in the normal direction of an active surface of the engagement contour, ie a cutting surface of the cutting edge opposite the plane of this active surface or Cutting surface has a protrusion.
  • the tinsel can be sucked off directly into the nozzle opening in the cutting direction before it can spread in the shaping tool.
  • the suction nozzle is arranged on the cutting knife in such a way that the nozzle opening is offset inwardly in relation to a plane of an active surface of the engagement contour, i.e. a cutting surface of the cutting edge with respect to the tool insert or the cutting knife. In this way, the part separated from the workpiece is not hindered by the suction nozzle when it falls down.
  • the suction nozzle of the suction device for flakes is implemented in the tool insert and the base body as a suction channel, the suction opening of which is arranged in the area of the engagement contour and the evacuation opening, which is connected to the vacuum pump via a pipe or a hose, in the area of the Base body is.
  • the Coanda effect is used in the vacuum pump.
  • the shaping tool is designed with a collecting container connected to the vacuum pump for receiving the extracted flakes. This prevents the flakes from being blown out of the pipes or hoses connected to the vacuum pump in an uncontrolled manner. Otherwise, the tinsel could also be directed into a waste chute via an open end of the pipe or hose connected to the vacuum pump.
  • the Figures 2 and 3 show of a shaping tool 1 for shearing a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1, this tool insert 3 being arranged on a schematically indicated base body 2 as the lower tool part of the shaping tool 1.
  • This suction nozzle 4 has a slot-shaped nozzle opening 4.1 with a rectangular, oval or elliptical opening cross section and extends in the direction of the engagement contour 3.1, that is to say the cutting edge, for example parallel to the direction of the engagement contour 3.1.
  • the suction nozzle 4 designed as a slot nozzle is designed to widen conically in the direction of the engagement contour 3.1, that is to say in the direction of the cutting edge.
  • These components that is to say the suction nozzle 4, the hose 5 and the vacuum pump 10, form part of a suction device for suctioning off flakes, as shown below with reference to FIG Figure 4 is explained.
  • Such a suction device of a shaping tool 1 with a tool insert 3 according to FIGS Figures 2 and 3 includes according to Figure 4 as a central unit, the vacuum pump 10 using the Coanda effect with a correspondingly from Figure 1 basic structure shown.
  • This vacuum pump 10 has a compressed air connection 17 for supplying compressed air 16 into the annular chamber 15.
  • This vacuum pump 10 is connected to the suction nozzle 4 arranged in the area of the engagement contour 3.1 of the tool insert 3 of the shaping tool via the hose 5, so that the flakes F produced in the area of the engagement contour 3.1 are sucked off.
  • the exhaust air containing this flake F is passed via a pipe or a hose 6 into a collecting container 7 in which the flake F is collected.
  • the vacuum pump 10 is thus integrated into the shaping tool 1 between the area of the cutting edge as engagement contour 3.1 and the collecting container 7, whereby the suction power, for example the length of the hoses 5 and 6 used, can be adjusted through the position of the vacuum pump 10.
  • the arrangement of the suction nozzle 4 on the tool insert 3, which is designed as a cutting knife, can according to FIGS Figures 2 and 3 done in different ways.
  • the cutting edge as engagement contour 3.1 merges into an active surface 3.2, which represents the cutting surface of the cutting edge and into the Figures 2 and 3 is designated as level E.
  • the suction nozzle 4 arranged opposite the engagement contour 3.1 in the area of the active surface 3.2 is offset inwardly in relation to the plane E in the direction of the tool insert 3 such that the plane E does not intersect the nozzle opening 4.1.
  • a part separated from a workpiece by means of the cutting edge as engagement contour 3.1 is not hindered by the suction nozzle 4 when it falls down, since the suction nozzle 4 does not protrude from this active surface 3.2.
  • the suction nozzle 4 is arranged on the tool insert 3 in such a way that an overhang a is produced.
  • the nozzle opening 4.1 is offset to the outside in the normal direction of the active surface 3.2 of the engagement contour 3.1 with respect to the plane E in relation to the tool insert 3.
  • the tinsel F can thus be sucked off directly into the nozzle opening 4.1 in the cutting direction before it can spread in the shaping tool 1.
  • the Figure 5 shows a cutting knife as a tool insert 3 with a cutting edge as engagement contour 3.1.
  • This tool insert 3 is arranged on a base body 2 of a shaping tool 1, the base body forming a lower tool part of this shaping tool 1.
  • this suction channel 8 with the suction opening 8.1 and the discharge opening 8.2 is shown as a separate element. It can be seen from this that the suction channel 8, beginning with the discharge opening 8.2, initially has a circular cross section, which then merges into a rectangular cross section, which then ends in the slit-shaped cross section of the suction opening 8.1.
  • Several suction openings 8.1 can also be implemented in the tool insert 3.1 by, for example, branching off several sections with rectangular cross-sections from the section of the suction channel 8 with a circular cross-section, each of which ends in a suction opening.
  • the individual cross-sections can have any geometry.
  • the suction opening 8.1 is according to the Figures 5 and 6 designed as a slit nozzle with a narrow slot and extends in the direction of the engagement contour 3.1 designed as a cutting edge, for example parallel to the direction of the engagement contour 3.1.
  • a connecting piece is flanged to the discharge opening 8.2 of the suction channel 8 of the tool insert 3 and is connected to a vacuum pump 10 via a hose 5.
  • This suction channel 8 thus constitutes a component of the in Figure 4 illustrated suction device of the forming tool 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Claims (6)

  1. Outil de façonnage (1) pour la séparation de matériaux métalliques ou non métalliques avec
    - au moins un corps de base (2), au niveau duquel au moins un insert d'outil (3) est agencé avec un contour de prise (3.1), dans lequel pour le cisaillage l'insert d'outil (3) est une lame de coupe avec une arête de coupe comme contour de prise (3.1), et
    - une buse d'aspiration (4) présentant une ouverture de buse (4.1) et agencée dans la zone du contour de prise (3.1) pour l'aspiration de paillettes (F) à l'extérieur de l'insert d'outil (3) qui est reliée à une pompe de dépression (10) utilisant l'effet Coanda au moyen d'un tuyau (5), dans lequel
    - la buse d'aspiration (4) présente une ouverture de buse (4.1) en forme de fente avec une section transversale d'ouverture rectangulaire, ovale ou elliptique et s'étend dans la zone du contour de prise (3.1) réalisé comme arête de coupe, et
    - la buse d'aspiration (4) est réalisée s'élargissant de manière conique en direction du contour de prise (3.1).
  2. Outil de façonnage (1) selon la revendication 1, avec un récipient de collecte (7) relié à la pompe de dépression (10) pour la réception des paillettes (F) aspirées.
  3. Outil de façonnage (1) selon la revendication 1 ou 2, pour lequel la buse d'aspiration (4) est agencée au niveau de l'insert d'outil (3) de telle manière que l'ouverture de buse (4.1) présente un porte-à-faux dans le sens normal d'une surface active (3.2) du contour de prise (3.1) par rapport au plan (E) de cette surface active (3.2).
  4. Outil de façonnage (1) selon la revendication 1 ou 2, pour lequel la buse d'aspiration (4) est agencée au niveau de l'insert d'outil (3) de telle manière que l'ouverture de buse (4) soit décalée vers l'intérieur par rapport à un plan (E) d'une surface active (3.2) du contour de prise (3.1) par rapport à l'insert d'outil (3).
  5. Outil de façonnage (1) pour la séparation de matériaux métalliques ou non métalliques avec
    - au moins un corps de base (2), au niveau duquel au moins un insert d'outil (3) est agencé avec un contour de prise (3.1), dans lequel pour le cisaillage l'insert d'outil (3) est une lame de coupe avec une arête de coupe comme contour de prise (3.1),
    - un canal d'aspiration (8) s'étendant dans l'insert d'outil (3) qui relie une ouverture d'aspiration (8.1) agencée dans la zone du contour de prise (3.1) pour l'aspiration de paillettes (F) avec une ouverture d'évacuation (8.2), dans lequel l'ouverture d'aspiration (8.1) est réalisée comme buse à fente avec une fente étroite qui s'étend parallèlement à la direction du contour de prise (3.1), et
    - une pompe de dépression (10) utilisant l'effet Coanda qui est reliée à l'ouverture d'évacuation (8.2).
  6. Outil de façonnage (1) selon la revendication 5 avec un récipient de collecte (7) relié à la pompe de dépression (10) pour la réception des paillettes (F) aspirées.
EP17000578.9A 2016-04-23 2017-04-06 Outil de façonnage pour la coupe de materiaux Active EP3235593B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016004961.8A DE102016004961A1 (de) 2016-04-23 2016-04-23 Formgebungswerkzeug zur Umformung von Metall- oder Nichtmetallwerkstoffen

Publications (2)

Publication Number Publication Date
EP3235593A1 EP3235593A1 (fr) 2017-10-25
EP3235593B1 true EP3235593B1 (fr) 2021-08-25

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ID=58501249

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Application Number Title Priority Date Filing Date
EP17000578.9A Active EP3235593B1 (fr) 2016-04-23 2017-04-06 Outil de façonnage pour la coupe de materiaux

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EP (1) EP3235593B1 (fr)
DE (1) DE102016004961A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017124658A1 (de) * 2017-10-23 2019-04-25 Homag Gmbh Bearbeitungsvorrichtung zum Bearbeiten von Werkstücken und Verfahren zum Wegführen von Spänen vom Werkzeug
DE102021126070A1 (de) * 2021-10-07 2023-04-13 Multivac Sepp Haggenmüller Se & Co. Kg Saugdüse

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07256356A (ja) * 1994-03-23 1995-10-09 Honda Motor Co Ltd トリム型装置
WO1997044153A1 (fr) 1996-05-21 1997-11-27 Lutz Peter Stephan Systeme de fraisage et procede pour fraiser la zone de soudage d'electrodes de soudage par points
EP0829947A1 (fr) * 1996-09-11 1998-03-18 Zihlmann Wickeltechnik AG Enlèvement de residus produits lors de la fabrication d'un rotor à collecteur
EP1009584A1 (fr) * 1997-09-05 2000-06-21 The Gleason Works Appareil eliminant les copeaux destine a une machine-outil
JPH11151537A (ja) * 1997-11-17 1999-06-08 Honda Motor Co Ltd スクラップカッタ用の切粉除去装置
JP4516726B2 (ja) * 2003-06-25 2010-08-04 株式会社アマダ パンチプレスにおける打抜きカスの排出装置、パンチプレス並びに金型装置、ダイ
DE10357923A1 (de) 2003-12-11 2005-07-07 Daimlerchrysler Ag Vorrichtung zum Umformen oder Zerteilen von Werkstücken mit integrierter Absaugeinrichtung
DE102009051461B4 (de) 2009-10-30 2012-09-13 Audi Ag Vorrichtung zum Beschneiden von Formteilen, insbesondere von Blechformteilen
DE102014200198A1 (de) * 2014-01-09 2015-07-09 Robert Bosch Gmbh Vorrichtung zur spanabhebenden Bearbeitung eines metallischen Bauteils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102016004961A1 (de) 2017-10-26
EP3235593A1 (fr) 2017-10-25

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