EP0027247B1 - Stamping tool - Google Patents

Stamping tool Download PDF

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Publication number
EP0027247B1
EP0027247B1 EP80106087A EP80106087A EP0027247B1 EP 0027247 B1 EP0027247 B1 EP 0027247B1 EP 80106087 A EP80106087 A EP 80106087A EP 80106087 A EP80106087 A EP 80106087A EP 0027247 B1 EP0027247 B1 EP 0027247B1
Authority
EP
European Patent Office
Prior art keywords
tool
punching
material strip
punching tool
separation
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
EP80106087A
Other languages
German (de)
French (fr)
Other versions
EP0027247A1 (en
Inventor
Jan Czudek
Stefan Gadzinski
Przemyslaw Wasilewski
Ryszard Czarnecki
Wieslaw Tomaszkiewicz
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.)
Politechnika Lodzka
Original Assignee
Politechnika Lodzka
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 Politechnika Lodzka filed Critical Politechnika Lodzka
Priority to AT80106087T priority Critical patent/ATE8114T1/en
Publication of EP0027247A1 publication Critical patent/EP0027247A1/en
Application granted granted Critical
Publication of EP0027247B1 publication Critical patent/EP0027247B1/en
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
    • 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/08—Dies with different parts for several steps in a process

Definitions

  • the invention relates to a simultaneous punching tool for punching out rotationally symmetrical hollow bodies from square-shaped blanks according to the preamble of claim 1.
  • a punching tool is known from PL-PS 93188, which is essentially equipped with a drawing die, a drawing punch and a differentiated hold-down device.
  • the differentiated hold-down consists of a pressure ring in which four axially displaceable semicircular segments are arranged.
  • the segments and the pressure ring are supported by two independent pressure springs, whereby a higher contact force is exerted on the segments than on the pressure ring.
  • the material is held in places where depressions have hitherto formed during deep drawing via the segments with greater force than at the other points. This results in an increase in the height of the compact and a compensation of the walls on the circumference.
  • the corners of the square blank of the board prevent the material from flowing regularly into the drawn part.
  • a compact produced in this way requires pre-trimming of the corners of the flange before the further machining process.
  • DE-A-2 753 800 also discloses a method for producing a deep-drawn part from a square plate, in which the protruding corners are also cut off in the second method step.
  • the object of the invention is to provide a punching tool with which a design of the blank is possible in such a way that a compact can be produced without pre-cutting for the subsequent operation, that is to say a hollow body with an angular flange.
  • two triangular punches 2 are fastened, which are intended for punching out essentially triangular recesses on the sides b of the material strip a together with the dies 3 which are attached in the lower tool plate 4.
  • a drawing die 5 is also attached, in which the sheet metal piece is formed and the outer contour of which forms the upper cutting knife 6 for cutting the tape a at point c.
  • a drawing punch 7 with a differentiated hold-down 8 and a cutting knife 9, which together with the cutting knife 6 serves to cut the tape a at point c.
  • the band a is punched out on both sides b with the punches 2 and dies 3 in the first working cycle.
  • the upper cutting knife 6 cuts off the tape a at the point c with the help of the lower cutting knife 9, a compact d being simultaneously formed by the drawing die 5 and the drawing punch 7 in cooperation with the differentiated hold-down 8.
  • the compact d is shifted to the second working stage, while at the same time the next push of the material strip a takes place by a corresponding stroke.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

1. Punching tool for punching out of rotationally symmetric hollow bodies from square plates, which tool is provided with a drawing die (5) and a drawing stamp (7) having a differential clamping device (8) consisting of a thrust ring and axially displaceable segments arranged diagonally of one another in the ring and having a relatively strong contact pressure, characterized in that a simultaneous punching tool is formed by additional provision of a punching tool (2, 3) consisting of two stamps (2) opposed in the movement direction of the material strip (a) and two associated dies (3) for punching out respective ones of two opposed triangular cutouts (b) on the sides of the material strip (a) and provision of a separation tool (6, 9) arranged in the movement direction of the material strip between the punching tool (2, 3) and the drawing die (5) or as the case may be the drawing stamp (7) for the separation of the most forward plate of the material strip (a).

Description

Die Erfindung betrifft ein Simultan-Stanzwerkzeug zum Ausstanzen von rotationssymmetrischen Hohlkörpern aus quadratförmigen Platinen nach dem Oberbegriff des Anspruches 1.The invention relates to a simultaneous punching tool for punching out rotationally symmetrical hollow bodies from square-shaped blanks according to the preamble of claim 1.

Aus der PL-PS 93188 ist ein Stanzwerkzeug bekannt, welches im wesentlichen mit einer Ziehmatrize, einem Ziehstempel und einem differenzierten Niederhalter ausgestattet ist. Der differenzierte Niederhalter besteht aus einem Druckring in welchem vier axial verschiebbare halbkreisförmige Segmente angeordnet sind. Die Segmente und der Druckring werden durch zwei unabhängige Druckfedern abgestützt, wobei über die Segmente eine höhere Anpreßkraft ausgeübt wird als über den Druckring. Hierdurch wird während des Formens des Preßlings das Material an Stellen, wo sich bislang beim Tiefziehen Vertiefungen bildeten, über die Segmente mit höherer Kraft als an den anderen Stellen festgehalten. Dadurch wird eine Vergrößerung der Höhe des Preßlings und ein Ausgleich der Wände am Umfang erreicht. Die Ecken des quadratischen Zuschnitts der Platine hindern jedoch einen regelmäßigen Fluß des Werkstoffes in das Ziehteil. Zudem bedarf ein derartig erzeugter Preßling vor dem weiteren Bearbeitungsprozeß einer Vorbeschneidung der Ecken des Flansches.A punching tool is known from PL-PS 93188, which is essentially equipped with a drawing die, a drawing punch and a differentiated hold-down device. The differentiated hold-down consists of a pressure ring in which four axially displaceable semicircular segments are arranged. The segments and the pressure ring are supported by two independent pressure springs, whereby a higher contact force is exerted on the segments than on the pressure ring. As a result, during the molding of the compact, the material is held in places where depressions have hitherto formed during deep drawing via the segments with greater force than at the other points. This results in an increase in the height of the compact and a compensation of the walls on the circumference. However, the corners of the square blank of the board prevent the material from flowing regularly into the drawn part. In addition, a compact produced in this way requires pre-trimming of the corners of the flange before the further machining process.

Aus der DE-A-2 753 800 ist zudem ein Verfahren zur Herstellung eines Tiefziehteiles aus einer quadratischen Platine bekannt, bei welchem ebenfalls im zweiten Verfahrenschritt ein Abtrennen der überstehenden Ecken vorgenommen wird.DE-A-2 753 800 also discloses a method for producing a deep-drawn part from a square plate, in which the protruding corners are also cut off in the second method step.

Aufgabe der Erfindung ist es, ein Stanzwerkzeug zu schaffen, mit dem eine Gestaltung des Zuschnittes derart möglich ist, daß ein Preßling ohne Vorbeschneidung für den nachfolgenden Arbeitsgang, also ein Hohlkörper mit einem ekkenlosen Flansch hergestellt werden kann.The object of the invention is to provide a punching tool with which a design of the blank is possible in such a way that a compact can be produced without pre-cutting for the subsequent operation, that is to say a hollow body with an angular flange.

Diese Aufgabe wird durch die im Patentanspruch gekennzeichnete Erfindung gelöst. Simultanwerkzeuge als solche sind bekannt, vgl. z. B. US-A-1 768 294, US-A-2332478 und CH-A-189200. Ein differenzierter Niederhalter wird hierbei allerdings nicht verwendet. Zudem wird dort teilweise aus einem Streifen ausgestanzt, der breiter ist als es die Platine an sich erfordert. Bei der CH-A-189 200 wird schließlich nicht verlustfrei getrennt. Insgesamt wird somit mehr Material verbraucht als die Geometrie des Hohlkörpers bzw. der Ausgangsplatine es vorgibt. Das erfindungsgemäße Stanzwerkzeug ermöglicht das beidseitige Ausklinken des Bandes bzw. ein Ausstanzen von dreieckförmigen Ausnehmungen an den Rändern des Bandes. Dies sichert den Erhalt eines optimalen Zuschnitts während des zweiten Arbeitstaktes des Stanzwerkzeuges, wobei das Bandstück abgeschnitten und gleichzeitig der Preßling umgeformt wird. Der optimale Zuschnitt ermöglicht einen regelmäßigen Fluß des Materials in das Ziehteil. Der entstandene Flansch ist dabei klein und ohne Ecken, was das weitere Stanzen erleichtert. Das erfindungsgemäße Stanzwerkzeug sichert ferner eine größere Materialausbeute und die Erzielung einer gleichmäßigen Wanddicke des Preßlings auf seinem Umfang. Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigt

  • Fig. 1 das Stanzwerkzeug in perspektivischer Draufsicht,
  • Fig.2 das Bandmaterial mit ausgeklinkten Rändern für die Quadratausschnitte mit abgeschnittenen Ecken, und
  • Fig.3 ein Ziehteil nach dem Ausstanzen bei dem zweiten Arbeitstakt des Stanzwerkzeuges.
This object is achieved by the invention characterized in the claim. Simultaneous tools as such are known, cf. e.g. B. US-A-1 768 294, US-A-2332478 and CH-A-189200. A differentiated hold-down is not used here. In addition, there is partially punched out of a strip that is wider than the board itself requires. Finally, the CH-A-189 200 does not separate without loss. Overall, more material is thus consumed than the geometry of the hollow body or of the output board dictates. The punching tool according to the invention enables the band to be released on both sides or a triangular recess to be punched out at the edges of the band. This ensures that an optimum cut is obtained during the second working cycle of the punching tool, the piece of tape being cut off and the compact being deformed at the same time. The optimal cutting enables a regular flow of the material into the drawn part. The resulting flange is small and without corners, which makes further punching easier. The punching tool according to the invention also ensures a greater material yield and the achievement of a uniform wall thickness of the compact on its circumference. An embodiment of the invention is shown in the drawing. It shows
  • 1 the punching tool in a perspective top view,
  • Fig.2 the tape material with notched edges for the square sections with cut corners, and
  • 3 shows a drawn part after punching out in the second working cycle of the punching tool.

An der oberen Werkzeugplatte 1 des Stanzwerkzeugs sind zwei dreieckförmige Stempel 2 befestigt, welche zum Ausstanzen von im wesentlichen dreieckigen Ausnehmungen an den Seiten b des Materialbandes a zusammen mit den Matrizen 3 bestimmt sind, die in der unteren Werkzeugplatte 4 angebracht sind. In der oberen Werkzeugplatte 1 ist ferner eine Ziehmatrize 5 angebracht, in der das Blechstück geformt wird und deren Außenumriß das obere Abschneidemesser 6 zum Abschneiden des Bandes a an der Stelle c bildet. Außerdem befinden sich in der unteren Werkzeugplatte 4 des Werkzeuges ein Ziehstempel 7 mit einem differenzierten Niederhalter 8 und ein Abschneidemesser 9, welches zusammen mit dem Abschneidemesser 6 dem Abschneiden des Bandes a an der Stelle c dient.On the upper tool plate 1 of the punching tool, two triangular punches 2 are fastened, which are intended for punching out essentially triangular recesses on the sides b of the material strip a together with the dies 3 which are attached in the lower tool plate 4. In the upper tool plate 1, a drawing die 5 is also attached, in which the sheet metal piece is formed and the outer contour of which forms the upper cutting knife 6 for cutting the tape a at point c. In addition, in the lower tool plate 4 of the tool there is a drawing punch 7 with a differentiated hold-down 8 and a cutting knife 9, which together with the cutting knife 6 serves to cut the tape a at point c.

Während des Senkens des Pressenstößels und damit der oberen Werkzeugplatte 1 des Stanzwerkzeuges wird im ersten Arbeitstakt das Band a an beiden Seiten b mit den Stempeln 2 und Matrizen 3 ausgestanzt. Im zweiten Arbeitstakt schneidet das obere Abschneidemesser 6 mit Hilfe des unteren Abschneidemessers 9 das Band a an der Stelle c ab, wobei gleichzeitig ein Preßling d durch die Ziehmatrize 5 und den Ziehstempel 7 in Zusammenarbeit mit dem differenzierten Niederhalter 8 geformt wird. Während des Rückweges des Pressenstößels nach oben wird der Preßling d in die zweite Arbeitsstufe verschoben, während zugleich der nächste Schub des Materialbandes a um einen entsprechenden Hub erfolgt.During the lowering of the press ram and thus the upper tool plate 1 of the punching tool, the band a is punched out on both sides b with the punches 2 and dies 3 in the first working cycle. In the second cycle, the upper cutting knife 6 cuts off the tape a at the point c with the help of the lower cutting knife 9, a compact d being simultaneously formed by the drawing die 5 and the drawing punch 7 in cooperation with the differentiated hold-down 8. During the return stroke of the press ram upwards, the compact d is shifted to the second working stage, while at the same time the next push of the material strip a takes place by a corresponding stroke.

Claims (1)

  1. Punching tool for punching out of rotationally symmetric hollow bodies from square plates, which tool is provided with a drawing die (5) and a drawing stamp (7) having a differential clamping device (8) consisting of a thrust ring and axially displaceable segments arranged diagonally of one another in the ring and having a relatively strong contact pressure, characterized in that a simultaneous punching tool is formed by additional provision of a punching tool (2, 3) consisting of two stamps (2) opposed in the movement direction of the material strip (a) and two associated dies (3) for punching out respective ones of two opposed triangular cutouts (b) on the sides of the material strip (a) and provision of a separation tool (6, 9) arranged in the movement direction of the material strip between the punching tool (2, 3) and the drawing die (5) or as the case may be the drawing stamp (7) for the separation of the most forward plate of the material strip (a).
EP80106087A 1979-10-11 1980-10-07 Stamping tool Expired EP0027247B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106087T ATE8114T1 (en) 1979-10-11 1980-10-07 PUNCH TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL1979218910A PL122555B3 (en) 1979-10-11 1979-10-11 Stamping die
PL218910 1979-10-11

Publications (2)

Publication Number Publication Date
EP0027247A1 EP0027247A1 (en) 1981-04-22
EP0027247B1 true EP0027247B1 (en) 1984-06-27

Family

ID=19998862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106087A Expired EP0027247B1 (en) 1979-10-11 1980-10-07 Stamping tool

Country Status (6)

Country Link
EP (1) EP0027247B1 (en)
AT (1) ATE8114T1 (en)
CS (1) CS227314B2 (en)
DD (1) DD153526A5 (en)
DE (1) DE3068365D1 (en)
PL (1) PL122555B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1251087B (en) * 1991-07-22 1995-05-04 Whirlpool Italia METHOD FOR OBTAINING THROUGH THE MOLDING OF A SUPPORTING BODY, IN PARTICULAR, OF USUAL SUSPENSIONS OF AN ELECTRIC MOTOR IN A HERMETIC-TYPE COMPRESSOR AND SUPPORTING BODY SO OBTAINED.
CN106111802A (en) * 2016-08-31 2016-11-16 成都宏明双新科技股份有限公司 A kind of longitudinally circle circle molding precision progressive die

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1768294A (en) * 1930-06-24 of cleveland
CH189200A (en) * 1935-10-15 1937-02-15 Albert Chappuis John Quick press.
US2332478A (en) * 1942-04-27 1943-10-19 Anthes Force Oiler Company Method of making lamp sockets
US2361687A (en) * 1943-02-05 1944-10-31 Owens Illinois Can Company Punch press
US2765760A (en) * 1951-12-27 1956-10-09 Lyon George Albert Method of press-forming and cutting articles from strip
US2918721A (en) * 1953-03-12 1959-12-29 Sylvania Electric Prod Process for fabricating a socket mount
US2989936A (en) * 1957-06-28 1961-06-27 Torrington Mfg Co Method for forming end plates and end rings
DE2500138A1 (en) * 1975-01-03 1976-07-08 Hestermann Gerhard Combined finishing and surface treatment of sheet - partial stamping allows surface treatment of shaped workpieces in continuous band
PL93188B1 (en) * 1975-06-02 1977-05-30
PL101963B1 (en) * 1976-12-02 1979-02-28 METHOD OF PRESSING ARTICLES HAVING SURFACE-OF-REVOLUTION MANTLES, BY MEANS OF TRANSFER PRESSES

Also Published As

Publication number Publication date
PL218910A3 (en) 1981-04-24
DD153526A5 (en) 1982-01-13
EP0027247A1 (en) 1981-04-22
PL122555B3 (en) 1982-08-31
ATE8114T1 (en) 1984-07-15
DE3068365D1 (en) 1984-08-02
CS227314B2 (en) 1984-04-16

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