DE2522379A1 - Extrusion of metallic workpieces - in which the blank is punched from the starting material and immediately extruded in the same work cycle - Google Patents
Extrusion of metallic workpieces - in which the blank is punched from the starting material and immediately extruded in the same work cycleInfo
- Publication number
- DE2522379A1 DE2522379A1 DE19752522379 DE2522379A DE2522379A1 DE 2522379 A1 DE2522379 A1 DE 2522379A1 DE 19752522379 DE19752522379 DE 19752522379 DE 2522379 A DE2522379 A DE 2522379A DE 2522379 A1 DE2522379 A1 DE 2522379A1
- Authority
- DE
- Germany
- Prior art keywords
- die
- blank
- extrusion
- hollow punch
- mandrel
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/20—Making uncoated products by backward extrusion
-
- 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
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
- B21K23/04—Making other articles flanged articles
Abstract
Description
Verfahren zum Fließpressen von metallischen Werkstücken Zusatz zu Patent ... (Patentanmeldung P 17 52 007.9 vom 20.3.68 Im Hauptpatent ist ein Verfahren zum Fließpressen von metallischen Werkstücken, insbesondere von metallischen Flanschen mit hohem Rohransatz beschrieben, bei dem ein kreisringförmiger Rohling in einer Matrize mittels eines Hohlstempels und eines Dorns durch Rückwärtsfließpressen verformt wird und der Dorn durch das entgegen der Wirkrichtung des Hohlstempels fließenden Material mitgenommen wird.Process for extrusion of metallic workpieces Addition to Patent ... (Patent application P 17 52 007.9 of March 20, 1968 In the main patent is a process for extrusion of metallic workpieces, especially metallic flanges described with a high pipe socket, in which a circular blank in a Die deformed by means of a hollow punch and a mandrel by backward extrusion and the mandrel is flowing through the counter to the effective direction of the hollow punch Material is taken.
Dieses Verfahren hat sich insbesondere beim Verpressen von schwer verformbaren Materialien, wie Sondermessing 76 zu Rohrflanschen mit einem hohen Ansatz als vorteilhaft erwiesen. Da sich diese schwer verformbaren Materialien mit üblichen Pressendrücken nur in erwärmtem Zustand verformen lassen, wurden die Rohlinge wie bei allen Formpreßverfahren zunächst in einen gesonderten Arbeitsgang in der Form, wie sie in die Matrize eingelegt werden, in einem gesonderten Arbeitsgang hergestellt. Dies geschah beispielsweise durch Stanzen. Anschließend wurden die Rohlinge in einem weiteren Arbeitsgang auf die notwendige Preßtemperatur erhitzt.This process has proven difficult, especially when pressing deformable materials, such as special brass 76 to pipe flanges with a high Approach proven beneficial. Since these difficult to deform materials with The blanks were made to deform the usual press pressures only in a heated state as with all compression molding processes, initially in a separate operation in the Shape as placed in the die in a separate operation manufactured. This was done, for example, by punching. Then the The blanks are heated to the required pressing temperature in a further operation.
Der Erfindung liegt die Aufgabe zugrunde, das oben erwähnte Verfahren wesentlich wirtschaftlicher zu gestalten.The invention is based on the object of the above-mentioned method to make it much more economical.
Diese Aufgabe wird dadurch gelöst, daß der Rohling zunächst aus einem flachen Material ausgestanzt und unmittelbar darauf in der selben Arbeitsstufe fließgepreßt wird. Dabei hat es sich als vorteilhaft erwiesen, daß der Außendurchmesser des Rohlings so gewählt wird, daß er dem Innendurchmesser der Matrize nahezu entspricht. Ein Fließen des Materials in Gegenrichtung der gewünschten Fließrichtung, d.h. ein Fliessen in Richtung auf die Matrizenwandung zu, ist damit vermieden.This object is achieved in that the blank initially consists of a flat material punched out and immediately afterwards extruded in the same work step will. It has proven to be advantageous that the outer diameter of Blank is chosen so that it almost corresponds to the inner diameter of the die. A flow of the material in the opposite direction of the desired flow direction, i.e. a Flow in the direction of the die wall is thus avoided.
Zur Durchführung des Verfahrens hat sich eine Vorrichtung als besonders zweckmäßig erwiesen, die aus einer Matrize, einem Hohlstempel und einem in einer am Boden der Matrize angeordneten Bohrung lose geführten Dorn besteht, bei der der Außendurchmesser des Hohlstempels dem Durchmesser der Matrizenöffnung nahezu entspricht. Die Matrizenöffnung ist innen ebenso wie der Hohlstempel außen scharfkantig ausgebildet, und beide arbeiten im Sinne eines Stanzwerkzeugs zusammen. Das Ausstanzen des ringförmigen Rohlings aus einem vollen flachen Material geschieht dadurch, daß der Rohling ausgestanzt und gleichzeitig oder unmittelbar darauf durch den Dorn das Mittelstück des Rohlings aus dem scheibenförmigen Rohlings herausgedrückt wird. Der zu verpressen de Rohling hat dann die Form einer Ringscheibe. Die auf dem Dorn verbleibende Scheibe kann als Ausgangsmaterial zum Verpressen kleinerer Abmessungen verwendet werden.A device has proven to be special for carrying out the method proved to be expedient, which consists of a die, a hollow punch and one in one at the bottom of the die arranged bore loosely guided mandrel, in which the The outer diameter of the hollow punch almost corresponds to the diameter of the die opening. The die opening is sharp-edged on the inside as well as the hollow punch on the outside, and both work together in the sense of a punching tool. The punching out of the ring-shaped Blank from a solid flat material is done by punching out the blank and at the same time or immediately thereafter, through the mandrel, the center piece of the blank is pushed out of the disc-shaped blank. The blank to be pressed then has the shape of an annular disc. The disc remaining on the mandrel can can be used as a starting material for pressing smaller dimensions.
Die Erfindung ist anhand des in den Figuren 1 bis 3 schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is shown schematically in FIGS Embodiment explained in more detail.
Figur 1 zeigt den Zustand vor dem Pressen, Figur 2 nach dem Ausstanzen des Rohling und Figur 3 den Zustand nach dem Fließ-Pressen.Figure 1 shows the state before pressing, Figure 2 after punching of the blank and FIG. 3 shows the state after extrusion.
Auf die Oberkante der Matrize 2 wird zunächst ein flaches Rohmaterial 12 beliebiger Abmessung in erwärmtem Zustand aufgelegt (Figur 1). Sodann wird der Hohlstempel 3 abgesenkt, der dabei unter Zusammenwirkung mit der Matrize 2 den eigentlich zu verpressenden Rohling 13 erzeugt (Figur 2).A flat raw material is first placed on the upper edge of the die 2 12 of any dimension placed in a heated state (Figure 1). Then the Hollow punch 3 lowered, which actually acts in conjunction with the die 2 to be pressed blank 13 is generated (Figure 2).
Beim weiteren Niedergehen des Hohlstempels 3 wird der Rohling 13 zu dem Rohrflansch 1 verformt. Dabei wird der Dorn 4 durch das entgegen der Bewegung des Stempels 3 fließende Material des Rohlings 13 mitgenommen, wodurch eine Reibung zwischen dem Dorn 4 und dem fließenden Material des Rohlings 13 vermieden ist. Eine glatte innere Oberfläche des Rohrflansches 1 ist die Folge. Damit die äußeren Abmessungen des Rohlings 13 paßgerecht hergestellt werden können, sind die Unterkante 14 des Hohlstempels und die Oberkante 15 der Matrize scharfkantig im Sinne eines Schnitt- oder Stanzwerkzeuges ausgebildet. Dies ist erforderlich, damit der Rohling 13 fest an der Innenwandung der Matrize 2 anliegt und somit ein Fließen des Materials in Richtung auf die Wandung der Matrize 2 vermieden ist. Gleichzeitig mit dem Ausstanzen des Rohlings 13 aus dem flachen Material 12 oder unmittelbar darauf wird mittels des Dorns 4 das Mittelstück 16 ausgepaßt. Hier kommt es nicht so sehr auf ein paßgerechtes Ausformen an, da der Rohrflansch 1 in jedem Fall noch an seinem Rohransatz bearbeitet wird.When the hollow punch 3 continues to fall, the blank 13 closes the pipe flange 1 is deformed. The mandrel 4 is thereby counter to the movement of the punch 3 flowing material of the blank 13 taken along, causing friction between the mandrel 4 and the flowing material of the blank 13 is avoided. One The result is a smooth inner surface of the pipe flange 1. So that the external dimensions of the blank 13 can be produced with a snug fit, the lower edge 14 of the Hollow punch and the upper edge 15 of the die sharp-edged in the sense of a cutting or punching tool formed. This is necessary so that the blank 13 is solid on the inner wall of the die 2 and thus a flow of the material in Direction of the wall of the die 2 is avoided. Simultaneously with the punching out of the blank 13 from the flat material 12 or immediately thereafter is by means of of the mandrel 4, the center piece 16 is cut out. Here it is not so much a question of a suitable one Forming, since the pipe flange 1 is still processed on its pipe socket in any case will.
Mittelstück 16 und das auf der Oberkante der Matrize 2 verbleibende Restmaterial 17 können als Rohmaterial für die Herstellung kleinerer Abmessungen verwendet werden.Middle piece 16 and the one remaining on the upper edge of the die 2 Remaining material 17 can be used as raw material for the production of smaller dimensions be used.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752522379 DE2522379A1 (en) | 1975-05-21 | 1975-05-21 | Extrusion of metallic workpieces - in which the blank is punched from the starting material and immediately extruded in the same work cycle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752522379 DE2522379A1 (en) | 1975-05-21 | 1975-05-21 | Extrusion of metallic workpieces - in which the blank is punched from the starting material and immediately extruded in the same work cycle |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2522379A1 true DE2522379A1 (en) | 1976-12-02 |
DE2522379C2 DE2522379C2 (en) | 1987-07-30 |
Family
ID=5947017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752522379 Granted DE2522379A1 (en) | 1975-05-21 | 1975-05-21 | Extrusion of metallic workpieces - in which the blank is punched from the starting material and immediately extruded in the same work cycle |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2522379A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009038607A1 (en) * | 2009-08-26 | 2011-03-31 | Tox Pressotechnik Gmbh & Co. Kg | Apparatus, method and tool for producing a collar pass in a component |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109530553B (en) * | 2019-01-25 | 2020-08-28 | 南通佳腾精密模具有限公司 | Blanking and flanging integrated forming stamping die |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1702278A (en) * | 1928-05-18 | 1929-02-19 | Simons Abraham | Method of making seamless containers |
US1908162A (en) * | 1931-01-12 | 1933-05-09 | Mihay Louis | Manufacture of couplings and the like |
DE1062201B (en) * | 1954-09-01 | 1959-07-30 | Marguerite Elisa Chappuis Geb | Mechanical press for cold extrusion of metal objects |
DE1752007A1 (en) * | 1968-03-20 | 1971-04-29 | Kabel Metallwerke Ghh | Process for extrusion of tubular workpieces, in particular of flanges with a high tube attachment |
-
1975
- 1975-05-21 DE DE19752522379 patent/DE2522379A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1702278A (en) * | 1928-05-18 | 1929-02-19 | Simons Abraham | Method of making seamless containers |
US1908162A (en) * | 1931-01-12 | 1933-05-09 | Mihay Louis | Manufacture of couplings and the like |
DE1062201B (en) * | 1954-09-01 | 1959-07-30 | Marguerite Elisa Chappuis Geb | Mechanical press for cold extrusion of metal objects |
DE1752007A1 (en) * | 1968-03-20 | 1971-04-29 | Kabel Metallwerke Ghh | Process for extrusion of tubular workpieces, in particular of flanges with a high tube attachment |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009038607A1 (en) * | 2009-08-26 | 2011-03-31 | Tox Pressotechnik Gmbh & Co. Kg | Apparatus, method and tool for producing a collar pass in a component |
Also Published As
Publication number | Publication date |
---|---|
DE2522379C2 (en) | 1987-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8162 | Independent application | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition |