DE231018C - - Google Patents

Info

Publication number
DE231018C
DE231018C DENDAT231018D DE231018DA DE231018C DE 231018 C DE231018 C DE 231018C DE NDAT231018 D DENDAT231018 D DE NDAT231018D DE 231018D A DE231018D A DE 231018DA DE 231018 C DE231018 C DE 231018C
Authority
DE
Germany
Prior art keywords
punch
cone
hole
countersinking
holes
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
DENDAT231018D
Other languages
German (de)
Publication of DE231018C publication Critical patent/DE231018C/de
Active legal-status Critical Current

Links

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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Description

Paten τ-An spRu c η :Sponsors τ-An spRu c η:

Lochstempel zur Herstellung versenkter Löcher, dadurch gekennzeichnet, daß der Stempel (a) unter dem Versenkungskegel (b) mit einem zylindrischen Rande (c) versehen ist, dessen Durchmesser gleich ist dem Durchmesser der Schneidfläche des Stempels, und wobei der Winkel (w) zwischen Mantellinie und Grundfläche mehr als 45° beträgt.Hole punch for making countersunk holes, characterized in that the punch (a) under the countersunk cone (b) is provided with a cylindrical edge (c) , the diameter of which is equal to the diameter of the cutting surface of the punch, and the angle (w) between The surface line and the base area are more than 45 °.

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (1)

KAISERLICHESIMPERIAL PATENTAMT.PATENT OFFICE. Um die mittels Stempel in Blechen, Flacheisen o. dgl. hergestellten Löcher mit einer Versenkung zu versehen, werden sie durch besondere Arbeitsvornahme konisch ausgefräst.To the holes made by means of stamps in sheet metal, flat iron or the like with a To provide countersinking, they are milled out conically by special work. Ein Lochen unter gleichzeitiger Versenkung bei Anbringung einer entsprechenden kegelförmigen Verdickung am Lochstempel ergab bisher nur verunstaltete Löcher und stets einen am inneren Rande der Versenkung entstehenden Grat.A hole with simultaneous countersinking when attaching a corresponding conical Thickening on the punch has so far only resulted in defaced holes and always one on the inner edge of the recess Ridge. Dieser Grat wird vermieden, und es werden völlig glatte versenkte Löcher erreicht, wenn nach vorliegender Erfindung, wie in der Zeichnung veranschaulicht, der Stempel α unter dem Versenkungskegel b mit einem zylindrischen Rande c versehen wird, dessen Durchmesser gleich ist dem Durchmesser der Schneidfläche Ct1 des Stempels, und wenn die Schräge des Kegels oder der Winkel w zwischen Mantellinie und Grundfläche mehr als 45 °, zweckmäßig etwa 50° beträgt. Durch den Rand c wird es verhindert, daß das vom Versenkungskegel bei m nach außen gedrängte Metall in den vom oberen verjüngten Teil des Stenv pels α und der Loch wandung gebildeten Raum eintritt; es erfolgt vielmehr bei der bezeichneten Schräge des Kegels eine entsprechende Verdichtung des Materials um den oberen Teil des Loches und dessen Versenkung. Das Loch wird vollständig glatt, und das Herausziehen des Stempels kann mit geringem Kraftaufwande vorgenommen werden.This burr is avoided and completely smooth countersunk holes are achieved if, according to the present invention, as illustrated in the drawing, the punch α under the countersunk cone b is provided with a cylindrical edge c, the diameter of which is equal to the diameter of the cutting surface Ct 1 of the punch, and if the slope of the cone or the angle w between the surface line and the base is more than 45 °, expediently about 50 °. The edge c prevents the metal pushed outward by the countersink cone at m from entering the space formed by the upper tapered part of the stem α and the wall of the hole; rather, there is a corresponding compression of the material around the upper part of the hole and its countersinking at the indicated incline of the cone. The hole will be completely smooth and the punch can be pulled out with little effort.
DENDAT231018D Active DE231018C (en)

Publications (1)

Publication Number Publication Date
DE231018C true DE231018C (en)

Family

ID=491176

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT231018D Active DE231018C (en)

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Country Link
DE (1) DE231018C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754907A (en) * 1950-10-02 1956-07-17 Olin Mathieson Picking up scrap ring resulting from extrusion of tubular articles
US2890070A (en) * 1954-06-16 1959-06-09 Gasaccumulator Svenska Ab Rail-bond shoe attachable by conically pointed brazing pin
DE1728345B1 (en) * 1962-06-12 1971-07-08 Rolf Susemihl Saw table for multi-purpose circular saws
EP1775042A1 (en) * 2005-10-14 2007-04-18 Gassner Ges. m.b.H. & Co. KG Method and apparatus for punching a metal sheet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754907A (en) * 1950-10-02 1956-07-17 Olin Mathieson Picking up scrap ring resulting from extrusion of tubular articles
US2890070A (en) * 1954-06-16 1959-06-09 Gasaccumulator Svenska Ab Rail-bond shoe attachable by conically pointed brazing pin
DE1728345B1 (en) * 1962-06-12 1971-07-08 Rolf Susemihl Saw table for multi-purpose circular saws
EP1775042A1 (en) * 2005-10-14 2007-04-18 Gassner Ges. m.b.H. & Co. KG Method and apparatus for punching a metal sheet

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