EP0064263B1 - Appareil pour réaliser des trous chanfreinés dans une tôle - Google Patents

Appareil pour réaliser des trous chanfreinés dans une tôle Download PDF

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Publication number
EP0064263B1
EP0064263B1 EP19820103583 EP82103583A EP0064263B1 EP 0064263 B1 EP0064263 B1 EP 0064263B1 EP 19820103583 EP19820103583 EP 19820103583 EP 82103583 A EP82103583 A EP 82103583A EP 0064263 B1 EP0064263 B1 EP 0064263B1
Authority
EP
European Patent Office
Prior art keywords
holding
punch
opening
down clamp
punch holder
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
Application number
EP19820103583
Other languages
German (de)
English (en)
Other versions
EP0064263A3 (en
EP0064263A2 (fr
Inventor
Ferdinand Dietz
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0064263A2 publication Critical patent/EP0064263A2/fr
Publication of EP0064263A3 publication Critical patent/EP0064263A3/de
Application granted granted Critical
Publication of EP0064263B1 publication Critical patent/EP0064263B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/02—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution
    • B24B39/023—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution the working tool being composed of a plurality of working rolls or balls

Definitions

  • the invention relates to a tool for producing countersunk holes in a perforated sheet metal on a punching machine, with a hold-down device in which a punch holder is guided, at the end of which a stamping die is attached, which has a cross-section corresponding to the desired countersink, in particular a conical shaped section, and one adjoining shaped pin with a diameter corresponding to the hole diameter of the countersunk hole, the shaped pin fitting into the opening of a die attached to the underside of the sheet and the edge of the hold-down opening and the edge of the die opening being sharp-edged.
  • this known tool has the very decisive disadvantage that after the holding-down device has been placed on the sheet metal and at the start of the shaping or embossing process, a wide annular gap is formed between the inner surface of the opening of the holding-down device and the outer surface of the shaped section of the stamping die.
  • the sheet metal material rise upward into the annular gap when the stamping die penetrates the pre-punched sheet, i.e. an annular bead protruding above the top of the sheet forms around the upper edge of the countersunk hole to be produced.
  • a tool with a hold-down device, in which a stamp holder is guided, at the end of which a stamp is attached via a shaft section, which has a conical shaped section and an adjoining shaped pin.
  • the shaft section has the same cross section as the shaped section at its uppermost end and is guided in an opening of the hold-down device with tight play.
  • This known tool also has a die arranged under the sheet metal underside with an opening which, in contrast to the above-mentioned known tool for producing countersunk holes by stamping, has not only the shaped pin of the stamping die, but above all the conical shaped section of the die Stamp is adapted, ie the opening of the die is designed in this known tool so that it widens upwards in the shape of a truncated cone or funnel, so that - in contrast to the known tool mentioned above - the opening in the die is not at its edge is sharp-edged.
  • This known tool is exclusively intended or suitable for producing openings with a passage in a sheet, ie openings in which the sheet metal material surrounding the opening is deformed in the shape of a truncated cone or funnel to the underside of the sheet.
  • a stamping of the sheet metal material does not take place with this known tool, but the material is only pressed when the tool is closed by the embossing die into the opening of the die which widens in the shape of a truncated cone or funnel or pulled in.
  • a tool of the type described at the outset is designed according to the invention in such a way that the embossing stamp is attached to the end of the stamp holder via a shank section, that the shank section has the same cross section as the shaped section at its upper end, and that the shank section is in the opening of the hold-down is guided with tight play, and that the die is curved upwards on its side facing the shaft section.
  • the shank section between the die and the punch holder is guided with tight play in the hold-down opening, the surface of the hold-down which lies on the sheet metal reaches right up to the edge of the countersink to be produced and thus presses from the start even before penetration of the die into the sheet immediately after this edge on the sheet surface and thus prevents the sheet material from being deformed (during the penetration of the die) that material is pushed upward beyond the edge of the countersink. This prevents bulging or bulging at the edge of the countersink in the making. In this area, the sheet surface remains unaffected by any material deformation and thus remains completely flat and uniform.
  • the arched design of the die further ensures that the required parallelism of the top and bottom of the sheet is retained in the area of the embossing.
  • the tool according to the invention which, like punching tools, can be attached and replaced on the rotary plate of an NC punching machine, makes it possible for the first time to produce countersunk holes by embossing on an NC punching machine at the same time as punching out any holes in a sheet metal, since this affects the sheet metal surfaces immediate surroundings of the countersunk holes, but also influences of immediately adjacent holes in the sheet metal can be avoided.
  • the diameter of the shaft section guided with tight play in the hold-down opening depends on the largest outer diameter of the shaped section of the die, i.e. according to the outer diameter of the conical shaped section, for example, which determines the outer edge of the countersink in the sheet.
  • the shaft section does not necessarily have to have a circular cross section, the cross section depends rather on the shape of the respective shaped section for forming the countersunk hole, which, depending on the shape of the shaped section, can also have any cross section deviating from the circular shape.
  • corresponding countersunk holes can be made in sheet metal from 0.5 mm, and not only standard or pointed countersinks, but also arbitrarily shaped special countersinks.
  • the tool according to the invention can also be produced very easily and cheaply with differently shaped stamping dies.
  • the entire structure of the tool does not have to be changed. Rather, it suffices to change the embossing die, the shaft section and the opening in the holding-down device which receives the stamp accordingly.
  • the tool according to the invention can therefore be designed very universally and can be modified for a wide variety of special purposes.
  • the embossing tool shown is constructed similarly to a punching tool used in NC punching machines, it consists of a punch holder 2 which is slidably arranged in a hold-down device 5.
  • a compression spring 3 is arranged between the holding-down device 5 and the upper end of the punch holder 2 interacting with the plunger 10 of the punching machine.
  • the stamp holder 2 is screwed to the upper pressure plate 4 and slidably slidable in the lower pressure plate.
  • the tool is attached in a known manner to an upper tool carrier 8 of the machine via the hold-down device 5, and a die 7 is attached to a lower carrier 9 of the machine.
  • a depth adjustment screw 1 is provided, which can be finely adjusted by hand using a vernier.
  • the actual embossing tool 6 is attached, which is guided with its cylindrical shaft with a close fit in the opening 12 of the hold-down device 5.
  • the end of the embossing die 6 is designed to form a hole with a countersink, that is to say a conical shaped section 13 adjoins the cylindrical shaft of the embossing die 6 and is shaped in accordance with the desired countersink.
  • This conical shaped section 13 merges into a cylindrical shaped section 14, the diameter of which corresponds to the hole diameter of the desired countersunk hole.
  • the opening 15 of the die 7 is selected in cross section and in diameter so that the shape section 14 fits into it with a slight play.
  • a cylindrical hole 16 is first punched out at the desired location in the sheet metal by a previous punching process, the inside diameter of which is selected to be somewhat larger than the inside diameter of the hole determined by the shaped section 14 of the countersunk hole to be produced.
  • the diameter of this cylindrical pre-punched hole 16 is chosen to be approximately 10 to 40% larger than the diameter of the desired countersunk hole.
  • the excess of this hole 16 depends, of course, on the type of countersink, the sheet material used, the sheet thickness, etc., but in any case it can very easily be determined by the person skilled in the art by trials.
  • the embossing depth shown in FIG. 2 and determined by the setting of the depth adjustment screw 1 is reached, the embossing die has deformed the edges of the hole 16 in accordance with the outline shape of its shaped sections 13 and 14, and the sheet metal material is in the sense of the arrows 17 shown in FIG. 2 has been displaced so that finally a countersunk hole 18 shown in Fig. 2 is formed.
  • a countersunk hole 18 is formed in this way, which ideally has a cylindrical hole section corresponding to the diameter of the shaped section 14 and an adjoining one and the shape of the shaped section 13 has corresponding conical countersunk section.
  • the sheet 11 is firmly clamped between the end face of the hold-down device 5 and the upper side of the die 7, namely the clamping pressure is determined by the spring 3.
  • the embossing die 6 is guided with very tight play of, for example, only 1/100 mm in the associated opening of the hold-down device, the material cannot be pushed upwards beyond the upper side of the sheet metal during the embossing process, so that it becomes a bulge or bulge on the edge the reduction 18 or 19 avoided.
  • upsetting on the back of the sheet metal 11 is avoided by the relatively tight play between the die opening 15 and the shaped section 14, this play amounts to approximately 3/100 mm, for example.
  • the edges of the openings 12 and 15 are very sharp-edged.
  • the die 7 is preferably curved slightly upward, for example curved up to about 0.5 ° in the direction of the sheet.
  • Fig. 3 shows another.Form for the shaped portion of the embossing die 6, this is shaped in the embodiment shown that a flat countersink 20 is formed.
  • the embossing process including the prepared punching out of a larger hole 16, is as described in connection with FIGS. 1 and 2 Material does not flow obliquely outwards, as in the case of the pointed countersink according to FIGS. 1 and 2, but above all downwards and is almost exclusively compressed in the lower region in the production of this flat countersink 20, as is again indicated in FIG. 3 by the arrows 17 .
  • a counter-tool with a fixed die is provided instead of the die 7, so that the desired countersinks are automatically formed on both sides when the upper tool is lowered and the embossing process begins via the die 6.
  • the upper and lower dies are matched to each other in this case.
  • the stamping die 6 does not necessarily have to have a circular cross section, the shaft section could possibly also have an angular cross section, for example if the depression should also be angular.
  • a suitable lubricant is preferably continuously supplied during the stamping process, as is known per se with stationary tools of a similar type.
  • a bore 24 leading from its end face into the space 27 in the holding-down device 5 is formed in the punch holder 2 and is aligned with a corresponding inflow channel 26 in the plunger 10 of the punching machine.
  • Corresponding channels 25 are also formed in the holding-down device 5, which open into the wall of the opening of the holding-down device.
  • Lubricant can be supplied to the stamp 6 via the channel 26, the bore 24, the space 27 and the channel 25, as shown in FIG. 1.
  • An oil-air mixture for lubricating and cooling the die 6 can also be supplied via the channel 26.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (8)

  1. Appareil pour réaliser des trous chanfreinés dans une tôle (11) préalablement percée, en opérant sur une machine à poinçonner, cet appareil comportant un serre-flan (5) dans lequel est monté un coulisseau (2) portant à son extrémité un poinçon d'estampage (6, 13, 14) ayant une partie (13) qui présente un profil d'estampage approprié, notamment un profil conique, pour réaliser le chanfreiné recherché, et une pointe d'estampage (14) raccordée à cette partie profilée (13) du poinçon et présentant un diamètre qui correspond au diamètre définitif du trou chanfreiné; cette pointe d'estampage (14) étant adaptée à s'engager avec un ajustage precis dans un trou (15) d'une matrice (7) disposée sous la tôle à traiter (11); et les bords du trou de sortie (12) du serre-flan et du trou d'entrée (15) de la matrice presentant des arêtes vives; l'appareil étant caracterisé en ce que le poinçon d'estampage (6, 13, 14) comporte une tige montée à l'extrémité du coulisseau (2) qui porte le poinçon, cette tige présentant la même section transversale que l'extrémite supérieure de la partie profilée (13) du poinçon; en ce que la tige du poinçon est montée à coulisse avec un faible jeu dans le trou de guidage (12) du serre-flan (5); et en ce que la matrice (7) comporte une face supérieure cambrée vers le haut, dans sa partie en regard de la tige du poinçon d'estampage.
  2. 2. Appareil selon la revendication 1, caractérisé en ce qu'il comporte des moyens pour régler la profondeur d'enfoncement du coulisseau (2) qui porte le poinçon.
  3. 3. Appareil selon l'une des revendications 1 ou 2, caractérisé en ce qu'il comporte une vis de réglage (1), disposée à l'endroit de l'extrémité du coulisseau porte-poinçon (2) qui coopère avec un poussoir (10) de la machine à poinçonner, et une échelle de réglage associée à la vis de réglage (1).
  4. 4. Appareil selon l'une des revendications 1 à 3, caractérisé en ce qu'il comporte un canal (24, 25), ménagé dans le coulisseau porte-poinçon (2) et/ou dans le serre-flan (5), pour amener un lubrifiant au poinçon d'estampage (6).
  5. 5. Appareil selon la revendication 4, caractérisé en ce que le canal ménagé dans le coulisseau porte-poinçon (2) débouche dans une cavité (27), comprise entre la tige du poinçon d'estampage (6, 13, 14) et le serre-flan (5) dans lequel est monté le coulisseau (2).
  6. 6. Appareil selon la revendication 5, caractérisé en ce qu'il comporte au moins un autre canal (25), qui part de la cavité (27) comprise entre la tige du poinçon d'estampage (6, 13, 14) et le serre-flan (5), et qui débouche latéralement dans le trou de guidage (12) prévu dans le serre-flan (5).
  7. 7. Appareil selon l'une des revendications 1 à 6, caractérisé en ce que le coulisseau porte-poinçon (2) est monté axialement dans un serre-flan (5) en forme de douille, comme un outil d'estampage, ce serre-flan comportant une face frontale, qui est adaptée à venir en appui sur la tôle à traiter, et qui présente un trou de guidage (12) pour la tige du poinçon (6) montée à coulisse dans ce trou avec un faible jeu.
  8. 8. Appareil selon la revendication 7, caractérisé en ce qu'il comporte un élément élastique (3), monté entre le serre-flan (5) et le coulisseau porte-poinçon (2), cet élément élastique (3) servant à déterminer l'effort d'appui exercé par le serre-flan (5) sur la tôle à traiter (11) pendant l'opération d'estampage.
EP19820103583 1981-04-28 1982-04-27 Appareil pour réaliser des trous chanfreinés dans une tôle Expired EP0064263B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813116765 DE3116765C1 (de) 1981-04-28 1981-04-28 Werkzeug zum Herstellen von Senkloechern oder Passloechern in einem Blech auf einer Stanzmaschine
DE3116765 1981-04-28

Publications (3)

Publication Number Publication Date
EP0064263A2 EP0064263A2 (fr) 1982-11-10
EP0064263A3 EP0064263A3 (en) 1983-06-22
EP0064263B1 true EP0064263B1 (fr) 1986-07-23

Family

ID=6130965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103583 Expired EP0064263B1 (fr) 1981-04-28 1982-04-27 Appareil pour réaliser des trous chanfreinés dans une tôle

Country Status (3)

Country Link
EP (1) EP0064263B1 (fr)
CH (1) CH655873A5 (fr)
DE (1) DE3116765C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8276514B2 (en) 2003-03-03 2012-10-02 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US8733250B2 (en) 2006-01-27 2014-05-27 Schott Ag Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device
US9423218B2 (en) 2010-09-17 2016-08-23 Schott Ag Method for producing a ring-shaped or plate-like element
US10684102B2 (en) 2010-09-17 2020-06-16 Schott Ag Method for producing a ring-shaped or plate-like element
CN111729967A (zh) * 2020-06-16 2020-10-02 深圳市亿和精密科技集团有限公司 一种基于冲压模具的打沙拉孔方法及装置

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DE4303807A1 (de) * 1993-02-10 1994-08-11 Teves Gmbh Alfred Spanlos geformte trichterförmige Durchgangsöffnung
DE19602360A1 (de) * 1996-01-24 1997-07-31 Teves Gmbh Alfred Blendenöffnung für eine Drucksteuer- und/oder Regelvorrichtung
DE10300831B4 (de) * 2003-01-10 2006-10-26 Groz-Beckert Kg Stanzeinrichtung für Green Sheets
FR2870145B1 (fr) * 2004-05-11 2006-06-23 Ferco Int Usine Ferrures Piece metallique avec trou chanfreine, procede et outillage pour le faconnae d'un tel trou chanfreine
DE102006018847B4 (de) * 2006-04-22 2010-04-01 E. Winkemann Gmbh & Co. Kg Verfahren und Vorrichtung zum Stanzen eines Loches mit kleinem Durchmesser-Längen-Verhältnis
DE102009037845A1 (de) 2009-08-18 2011-04-14 Fresenius Medical Care Deutschland Gmbh Einwegelement, System zum Pumpen sowie Verfahren zum Pumpen einer Flüssigkeit
DE102014103975B4 (de) * 2014-03-24 2018-12-20 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren, Vorstanzwerkzeug und Planierwerkzeug zur Herstellung von angesenkten Löchern in einem plattenförmigen Material
US12151445B2 (en) * 2022-09-28 2024-11-26 The Boeing Company Countersinks in thin gauge thermoplastic skins
CN118635363B (zh) * 2024-08-16 2024-10-25 常州市威克特智能科技有限公司 一种用于仪表盘加工的冲切设备及冲切方法

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DE360252C (de) * 1922-09-30 Schiess Akt Ges Maschf Schmiervorrichtung fuer die Stempel von Lochmaschinen u. dgl.
GB151183A (en) * 1919-11-28 1920-09-23 Gunnar Mattsson Improvements in or relating to a process of producing cylindrical holes having an exact diameter
DE474353C (de) * 1928-03-23 1929-03-30 Simonswerk Gmbh Vorrichtung zum Pressen von ueber die ganze Staerke des plattenfoermigen Werkstueckes durchlaufenden Schraegwaenden an Aussenseiten oder in Durchbrechungen
GB511106A (en) * 1938-09-21 1939-08-14 Blackburn Aircraft Ltd Improvements in or relating to the riveting of metal plates
US2483799A (en) * 1945-06-26 1949-10-04 Glenn L Martin Co Dimpling tool
FR998229A (fr) * 1949-08-26 1952-01-16 Hurcal Engineering Company Ltd Procédé et dispositif pour former, dans du métal, des trous comportant un logement pour une tête noyée
US3442110A (en) * 1965-08-12 1969-05-06 Budd Co Method and apparatus for making holes with cold-worked margins and the product
FR2308440A1 (fr) * 1975-04-21 1976-11-19 Ferco Int Usine Ferrures Procede de fraisage
JPS52132490A (en) * 1976-04-30 1977-11-07 Yoshitaka Nakanishi Method of sinking counter sink in plate blank

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8276514B2 (en) 2003-03-03 2012-10-02 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US8733250B2 (en) 2006-01-27 2014-05-27 Schott Ag Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device
US9423218B2 (en) 2010-09-17 2016-08-23 Schott Ag Method for producing a ring-shaped or plate-like element
US9651345B2 (en) 2010-09-17 2017-05-16 Schott Ag Method for producing a ring-shaped or plate-like element
US10684102B2 (en) 2010-09-17 2020-06-16 Schott Ag Method for producing a ring-shaped or plate-like element
CN111729967A (zh) * 2020-06-16 2020-10-02 深圳市亿和精密科技集团有限公司 一种基于冲压模具的打沙拉孔方法及装置

Also Published As

Publication number Publication date
EP0064263A3 (en) 1983-06-22
DE3116765C1 (de) 1990-10-04
EP0064263A2 (fr) 1982-11-10
CH655873A5 (de) 1986-05-30

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