EP1048375A2 - Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfliesspressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens - Google Patents
Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfliesspressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens Download PDFInfo
- Publication number
- EP1048375A2 EP1048375A2 EP00108684A EP00108684A EP1048375A2 EP 1048375 A2 EP1048375 A2 EP 1048375A2 EP 00108684 A EP00108684 A EP 00108684A EP 00108684 A EP00108684 A EP 00108684A EP 1048375 A2 EP1048375 A2 EP 1048375A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- upsetting
- insert
- blank
- flange
- 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
Images
Classifications
-
- 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
-
- 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
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- 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
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
Definitions
- the invention is in the field of prefabrication for gas-filled Surge arrester and is in the design the course of a cold extrusion process and in the design the associated press tool a one-step Double-press to apply with which a copper blank by cold extrusion into an end electrode for a gas-filled Surge arrester is reshaped.
- Gas-filled surge arresters in use today exist in the simplest version from a hollow cylindrical Ceramic insulator and two in the open ends of the insulator used end electrodes. These end electrodes either exist from an iron-nickel-cobalt alloy or from copper and are cup-shaped so that they have a pronounced Have solder flange. Leave cup-shaped electrodes easiest by extrusion or embossing manufacture (DE 28 28 650, DE 31 00 924, US 3,876,994).
- Machines for the production of finished parts by cold extrusion usually lead to the forming of a blank several pressing steps.
- Previously by cutting off a usually round rod material is obtained from the blank, which then automatically into the actual press tool is used.
- the cutting process for which widely so-called cold exchange scissors is common (wire world 2-1979, Page 54ff) is integrated in the work steps of the press (DE 36 35 677 A1).
- the length of the blank is determined by a feeder determines the wire the cutting tool feeds, the feed length and thus the length the blank is adjustable by means of a sliding block.
- the cutting tool is assigned a stop against which the end of the wire can be moved.
- the cold exchange is also used for the extraction of copper blanks; the minimum length of such blanks can be for bar material with a diameter d of 6 to 35 mm are 0.2 d, if the rod material to be cut is previously compressed brought to the yield point in the room pressure state becomes.
- - Wire World 1979.
- the blanks With very small pressed parts, as there are end electrodes of gas-filled surge arresters the blanks may have to be made of copper wire cut with a diameter of about 4.5 mm become.
- the Pre-upsetter A pre-upsetting needle for preforming the electrode body and a filler to limit the stroke of the pre-upsetting needle and the paver an insert with a spigot to form the spherical cap and with one adjacent to the pin plan an annular surface for forming the solder flange on.
- the pre-upsetter and the use of the paver stop a distance from the die at the front dead center.
- the invention Based on a procedure with the characteristics of the generic term of claim 1 and with a press tool the features of the preamble of claim 2 the invention has for its object the forming of the copper blank to make an end electrode more efficient.
- end electrodes 1 are to be produced which essentially from the actual electrode body 2 and a solder flange 3, the solder flange and the electrode body connected to each other via a hollow cone-like wall 4 are, which forms a conical dome 5.
- calotte protrudes a welding nozzle 6 for welding a connecting wire to the electrode 1.
- a pressing tool is used to produce such an end electrode, that according to Figures 1 and 3 essentially a stationary die 10 and two of these dies assigned stamps 20 and 30, which is at the stamp 20 by a pre-upsetter and by the stamp 30 around is a paver.
- the die 10 has a continuous, stepped bore in which a filler 17 and an insert 11 are first inserted are.
- an insert sleeve 14 is inserted, the end face 15 within the bore 12 of the insert 11 relative to the End face 13 of the insert 11 set back by a distance a is.
- This distance corresponds in principle to the thickness of the Electrode flange 3 to the electrode flange in this area to shape; however, it is about 5% smaller than that Thickness of the solder flange to be manufactured.
- the paver 30 contains an insert 31, which forms the shaping part of the paver 30 and the 4 with a pin 33 for the final shaping of the calotte 5 of the end electrode is provided and continues to be adjacent on the pin with a flat circular ring surface 32 is provided to form the solder flange 3.
- the paver 30 is guided in the associated cold extrusion machine so that he is at the front dead center with his circular ring surface 32 a distance b from the end face 15 of the insert 11 the die 10 adheres to, which is about 5% of the thickness of the to be produced Solder flange 3 is. With a thickness of the solder flange the distance b is approximately 0.48 mm, for example 2/100 mm.
- the die 10 is in a first pressing step assigned to the pre-upsetter 20, which u.a. a socket 21 for Guide of the pre-upsetting needle 22 and its pre-upsetting needle 22 is slightly rounded in the edge region 23.
- Rear space 24 of the pre-upset is a not shown Spring and a filler not shown for Determination of the depth of penetration of the pre-upsetting needle 22 into the Arranged die 10.
- the filler is dimensioned so that the pre-upsetter 22 in the retracted state of the pre-upset protrudes into the die by about 0.5 mm and thereby preforms the calotte of the end electrode.
Abstract
Description
- Figur 1
- die Matrize des Preßwerkzeuges mit zugeordnetem Fertigmacher,
- Figur 2
- den Einsatz und die Einsatzbüchse der Matrize,
- Figur 3
- den der Matrize im ersten Preßschritt zugeordneten Vorstaucher,
- Figur 4
- den der Matrize im zweiten Preßschritt zugeordneten Fertigmacher und
- Figur 5
- eine mit dem Preßwerkzeug hergestellte Endelektrode.
Claims (2)
- Verfahren zur Umformung eines Kupfer-Rohlinges durch Kaltfließpressen in eine mit einer kegeligen Kalotte und einem Lötflansch versehene Endelektrode für einen gasgefüllten Überspannungsableiter,
bei dem zunächst in einem ersten Fertigungsschritt der Kupfer-Rohling von einem Runddraht mit einem Durchmesser von etwa 4,5 mm abgeschnitten wird und bei dem anschließend der Kupfer-Rohling zwischen ein erstes, in einer feststehenden Halterung angeordnetes Formteil und zwei weiteren, in bewegbaren Halterungen angeordneten Formteilen eingebracht und die beiden weiteren Formteile in zwei Preßschritten nacheinander gegen den Kupfer-Rohling gefahren werden,
dadurch gekennzeichnet,daß ein Kupfer-Rohling abgeschnitten wird, dessen Volumen dem Volumen der herzustellenden Endelektrode entspricht, und daß mit dem zweiten Preßschritt der herzustellenden Endelektrode (1) ihre endgültige Form gegeben wird. - Preßwerkzeug mit einem zugeordneten Schneidwerkzeug für eine einstufige Doppeldruckpresse zur Durchführung des Verfahrens nach Patentanspruch 1,
bestehend aus einer Matrize und aus zwei dieser Matrize zugeordneten Stempeln, nämlich einem Vorstaucher und einem Fertigmacher, wobeidie Matrize einen mit einer Waffelung versehenen Gegenstempel aufweist und mit einem Einsatz versehen ist, der zur Formung des eigentlichen Elektrodenkörpers und der Außenwand der Kalotte dient,der Vorstaucher eine innerhalb einer Vorstaucherbuchse geführte Vorstauchernadel zur Vorformung des Elektrodenkörpers sowie ein Füllstück zur Hubbegrenzung der Vorstauchernadel undder Fertigmacher einen Einsatz mit einem Zapfen zur Formung der Kalotte und mit einer an den Zapfen angrenzenden planen Kreisringfläche zur Formung des Lötflansches aufweist,der Einsatz des Fertigmachers im vorderen Totpunkt einen Abstand zur Matrize einhältund das zugeordnete Schneidwerkzeug eine Einzugseinrichtung aufweist, die zur Bestimmung der Länge des als Rohling abzuschneidenden Drahtstückes mit einem Kulissenstein versehen ist,daß der Kulissenstein eine solche Länge aufweist, daß die Länge des abgeschnittenen Drahtstückes kleiner als der Durchmesser des Runddrahtes ist,daß die Vorstauchernadel (22) eine abgerundete Kante (23) aufweist und das Füllstück der Vorstauchernadel derart bemessen ist, daß die Vorstauchernadel im eingefahrenen Zustand des Vorstauchers aus der Vorstaucherbuchse heraus- und in die Matrize um etwa 0,5 mm hineinragt,und daß der Matrizeneinsatz (11) eine zylindrische Bohrung (12) aufweist, die den Außendurchmesser des Lötflansches (3) festlegt und in die zur Formung des eigentlichen Elektrodenkörpers (2) und der Außenwand (4) der Kalotte (5) eine Einsatzbüchse (14) eingesetzt ist,
wobei zur Formung des Lötflansches die Stirnfläche (15) der Einsatzbüchse von der Stirnfläche (13) der Matrize (10,11) einen Abstand (a) aufweist, der etwa 5% kleiner als die Dicke des herzustellenden Lötflansches (3) ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09180659.6A EP2161085A3 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19920040 | 1999-04-23 | ||
DE1999120040 DE19920040A1 (de) | 1999-04-23 | 1999-04-23 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Preßwerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09180659.6A Division-Into EP2161085A3 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
EP09180659.6A Division EP2161085A3 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1048375A2 true EP1048375A2 (de) | 2000-11-02 |
EP1048375A3 EP1048375A3 (de) | 2008-10-22 |
EP1048375B1 EP1048375B1 (de) | 2016-12-28 |
Family
ID=7906634
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09180659.6A Withdrawn EP2161085A3 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
EP00108684.2A Expired - Lifetime EP1048375B1 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfliesspressen |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09180659.6A Withdrawn EP2161085A3 (de) | 1999-04-23 | 2000-04-20 | Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfließpressen und Presswerkzeug mit zugeordnetem Schneidwerkzeug zur Durchführung des Verfahrens |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP2161085A3 (de) |
DE (2) | DE19920040A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2181783A1 (de) * | 2008-11-03 | 2010-05-05 | Südsta AG | Stange und Verfahren zu ihrer Herstellung |
CN104014605A (zh) * | 2014-05-13 | 2014-09-03 | 盐城理研精密锻造有限公司 | 等边三爪法兰滑套反向反挤工艺及反向反挤模具 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104646586A (zh) * | 2014-06-14 | 2015-05-27 | 柳州市奥凯工程机械有限公司 | 锻造加工刀具毛坯的模具 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1410093A (en) * | 1919-03-22 | 1922-03-21 | Valley Forging Company | Method of forming metal-hubbed articles |
US2593126A (en) * | 1949-07-15 | 1952-04-15 | Lamson & Sessions Co | Manufacture of pipe plugs or the like |
DE3100924A1 (de) * | 1981-01-14 | 1982-08-05 | Siemens AG, 1000 Berlin und 8000 München | "gasentladungs-ueberspannungsableiter" |
US5174025A (en) * | 1990-09-01 | 1992-12-29 | Nippon Densan Corporation | Method of manufacturing a hub for a spindle motor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3876994A (en) * | 1972-06-22 | 1975-04-08 | Ibm | Planar bias field control of magnetic bubble domain apparatus |
DE2828650C3 (de) * | 1978-06-29 | 1982-03-25 | Siemens AG, 1000 Berlin und 8000 München | Überspannungsableiter |
DE3635677A1 (de) * | 1986-10-21 | 1988-04-28 | Franz Martin Arndt | Teilwinkelkorrekte abschneid- und matrizenrevolverbaugruppe als umformeinheit fuer metallteile |
US4779444A (en) * | 1987-03-12 | 1988-10-25 | The National Machinery Company | Closed die forging machine |
DE19535264A1 (de) * | 1995-09-22 | 1997-03-27 | Hilgeland Gmbh & Co Geb | Hochleistungskaltpresse |
-
1999
- 1999-04-23 DE DE1999120040 patent/DE19920040A1/de not_active Ceased
- 1999-04-23 DE DE19964418A patent/DE19964418B4/de not_active Expired - Lifetime
-
2000
- 2000-04-20 EP EP09180659.6A patent/EP2161085A3/de not_active Withdrawn
- 2000-04-20 EP EP00108684.2A patent/EP1048375B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1410093A (en) * | 1919-03-22 | 1922-03-21 | Valley Forging Company | Method of forming metal-hubbed articles |
US2593126A (en) * | 1949-07-15 | 1952-04-15 | Lamson & Sessions Co | Manufacture of pipe plugs or the like |
DE3100924A1 (de) * | 1981-01-14 | 1982-08-05 | Siemens AG, 1000 Berlin und 8000 München | "gasentladungs-ueberspannungsableiter" |
US5174025A (en) * | 1990-09-01 | 1992-12-29 | Nippon Densan Corporation | Method of manufacturing a hub for a spindle motor |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2181783A1 (de) * | 2008-11-03 | 2010-05-05 | Südsta AG | Stange und Verfahren zu ihrer Herstellung |
CN104014605A (zh) * | 2014-05-13 | 2014-09-03 | 盐城理研精密锻造有限公司 | 等边三爪法兰滑套反向反挤工艺及反向反挤模具 |
CN104014605B (zh) * | 2014-05-13 | 2016-06-15 | 盐城理研精密锻造有限公司 | 等边三爪法兰滑套反向反挤工艺及反向反挤模具 |
Also Published As
Publication number | Publication date |
---|---|
EP1048375B1 (de) | 2016-12-28 |
DE19920040A1 (de) | 2000-11-02 |
EP2161085A3 (de) | 2017-10-04 |
EP2161085A2 (de) | 2010-03-10 |
EP1048375A3 (de) | 2008-10-22 |
DE19964418B4 (de) | 2006-06-08 |
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