DE478772C - Multi-hole die - Google Patents
Multi-hole dieInfo
- Publication number
- DE478772C DE478772C DEH117439D DEH0117439D DE478772C DE 478772 C DE478772 C DE 478772C DE H117439 D DEH117439 D DE H117439D DE H0117439 D DEH0117439 D DE H0117439D DE 478772 C DE478772 C DE 478772C
- Authority
- DE
- Germany
- Prior art keywords
- tab
- hole die
- die
- punch
- hole
- 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
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)
Description
1Vlehrlochmatrize Die bekannten Mehrlochmatrizen haben den Nachteil, daß die Auflagefläche der Matrize eben ist, so daß die beiden Druckkräfte zwischen Stempel und Matrize über Flächen verteilt sind, die unmittelbar vor der Quetschgrenze beim Durchlochen Biegungsspannungen hervorgerufen und ein 'Krummbiegen der Lasche zur Folge haben.1Vlehrlochmatrize The known multi-hole matrices have the disadvantage that the support surface of the die is flat, so that the two compressive forces between The punch and die are distributed over areas immediately before the crush limit When punching through, bending stresses caused and a 'bending over of the tab have as a consequence.
Um diesen Mangel nun gänzlich aufzuheben, ist gemäß der Erfindung eine Mehrlochmatrize, insbesondere zum Laschenlochen, so gebaut, daß die obere Druckfläche vom Mittelloch der inneren Löcher nach beiden Seiten um so viel geneigt ist, daß die Lasche beim Durchdrücken der Lochstempel pfeilbogenartig gespannt wird und somit bei der Druckentlastung nach der Durchlochung wieder in ihre ursprüngliche Geradlage zurückfedert, da sich die beim Lochen auftretenden Biegungsspannungen federnd auswirken können.In order to completely eliminate this deficiency, is according to the invention a multi-hole matrix, especially for tab hole punching, built so that the upper pressure surface is inclined from the center hole of the inner holes on both sides by so much that the flap is stretched like an arrow-bow when the punch is pushed through and thus when the pressure is relieved, after the perforation, it returns to its original straight position springs back, as the bending stresses that occur during punching have a resilient effect can.
Der Erfindungsgegenstand ist auf der Zeichnung in einem Ausführungsbeispiel veranschaulicht, und zwar zeigen Abb. z die neue Spanndruckmatrize in Ansicht von oben und Abb. 2 dieselbe aufgespannt mit den Lochstempeln und zum Lochen zwischengelegter Lasche im Längsschnitt von vorn gesehen.The subject of the invention is shown in the drawing in an exemplary embodiment illustrated, namely Fig. z show the new clamping pressure die in view of above and Fig. 2 the same stretched with the punch and interposed for punching Tab viewed from the front in longitudinal section.
Die obere Druckfläche der an sich bekannten Matrize a mit vier konischen Schneidlöchern b ist je vom Mittelloch der inneren Löcher b1, b2 nach beiden Seiten a1, a2 um so viel geneigt, daß die Lasche c beim Durchdrücken der Lochstempel d pfeilbogenartig gespannt wird. Hierdurch wird erreicht, daß bei Aufhebung des Druckes unmittelbar nach der Durchlochung die Lasche c wieder in ihre ursprüngliche Geradlage zurückfedert und nicht mehr geradegerichtet zu werden braucht.The upper pressure surface of the die a known per se with four conical ones Cutting holes b is each from the center hole of the inner holes b1, b2 on both sides a1, a2 inclined so much that the tab c when pressing through the punch d is stretched like an arrow bow. This ensures that when the pressure is released immediately after the perforation, the flap c returns to its original straight position springs back and no longer needs to be straightened.
Die Zeichnung zeigt nur ein Ausführungsbeispiel. Änderungen, die nicht aus dem Rahmen der Erfindung herausfallen und sich von selbst ergeben, z. B. besondere Berechnungen der seitlichen Neigungen in bezug -auf größere oder kleinere Laschen usw., bleiben vorbehalten.The drawing shows only one embodiment. Changes that do not fall outside the scope of the invention and arise by themselves, e.g. B. Special calculations of lateral inclination with respect - to larger or smaller plates, etc., are reserved.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH117439D DE478772C (en) | Multi-hole die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH117439D DE478772C (en) | Multi-hole die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE478772C true DE478772C (en) | 1929-07-03 |
Family
ID=7172823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH117439D Expired DE478772C (en) | Multi-hole die |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE478772C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4087912A (en) * | 1976-01-21 | 1978-05-09 | Granone Charles J | Punch |
-
0
- DE DEH117439D patent/DE478772C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4087912A (en) * | 1976-01-21 | 1978-05-09 | Granone Charles J | Punch |
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