EP0128486B1 - Porte-outil inférieur d'une machine emporte-pièce, destiné surtout à l'introduction d'une matrice - Google Patents

Porte-outil inférieur d'une machine emporte-pièce, destiné surtout à l'introduction d'une matrice Download PDF

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Publication number
EP0128486B1
EP0128486B1 EP84106292A EP84106292A EP0128486B1 EP 0128486 B1 EP0128486 B1 EP 0128486B1 EP 84106292 A EP84106292 A EP 84106292A EP 84106292 A EP84106292 A EP 84106292A EP 0128486 B1 EP0128486 B1 EP 0128486B1
Authority
EP
European Patent Office
Prior art keywords
die
longitudinal guide
tool holding
holding fixture
intermediate member
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
EP84106292A
Other languages
German (de)
English (en)
Other versions
EP0128486A1 (fr
Inventor
Hans Dipl.-Ing. Klingel
Alfred Matheis
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.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Publication of EP0128486A1 publication Critical patent/EP0128486A1/fr
Application granted granted Critical
Publication of EP0128486B1 publication Critical patent/EP0128486B1/fr
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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17761—Side detent
    • Y10T279/17854—Longitudinal clamping wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T483/00—Tool changing
    • Y10T483/10—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T483/00—Tool changing
    • Y10T483/17—Tool changing including machine tool or component
    • Y10T483/1729—Reciprocating tool machine tool [e.g., broaching machine, shaping machine, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9473—For rectilinearly reciprocating tool

Definitions

  • the invention relates to a tool holder comprising an upwardly open receiving recess of a punching machine, into which a die is inserted in a lowering manner.
  • a tool holder comprising an upwardly open receiving recess of a punching machine, into which a die is inserted in a lowering manner.
  • an at least two-part tool is used, which comprises at least one die and a punch. The latter is inserted into an upper tool holder, while the die is inserted into a lower tool holder with a lowering recess.
  • a tight fit between the outer contour of the die and the receiving recess is necessary.
  • the outer contour of the die is often circular, but the circle can be interrupted by protrusions, notches or the like.
  • the cross section of the receiving recess is constant from its free upper edge to the support surface, i.e. It is generally not intended to attach an chamfer or chamfer. This is mainly due to the fact that a closed support surface for the workpiece to be machined, for example a sheet metal plate, is important on the die and the surrounding area of the receptacle. On the other hand, this makes it difficult to insert the die into the receiving recess, because with the tight fit, even a slight tilting makes it impossible to lower or insert it.
  • receiving recess open at the top
  • a receptacle is also open at the bottom, but this opening is less. It has nothing to do with the assembly of the die, rather it enables the punched part to pass downward.
  • the receiving recess itself is located either directly on the machine table or the like of the punching machine or on a machine part, in particular a ring-shaped machine part, which is inserted into this machine table. However, the latter is of minor importance with regard to the present invention.
  • GB-A-2 038 222 discloses a punching machine in which the die is inserted into a tubular piston of a special hydraulic control of this machine.
  • the piston thus also forms the tool holder and its bore corresponds to the holder recess of conventional punching machines.
  • the insertion of the die into the bore of this tubular piston is additionally made more difficult by the fact that this bore is narrowed like a shoulder and the outer collar on the die at least makes it difficult to observe the centering process.
  • the object of the invention is now seen in designing a punching machine in the area of the lower tool holder in such a way that the die can be inserted more easily and more quickly.
  • the invention proposes that the punching machine be designed in the region of the upwardly open receptacle according to the preamble of claim 1 in accordance with the characterizing part of this claim.
  • the die is brought into the space between the upper and lower receptacle, in particular by hand, transversely to the working direction of the punch, for example displaced along the upwardly facing surface of the lower tool receptacle. It is held so that its counter surface hurries ahead and is moved as precisely as possible against the cross stop. As soon as the counter surface of the die has reached the cross stop, the die is located exactly above the receiving recess.
  • the longitudinal guide should protrude so far beyond the upper edge of the receiving recess that the die is guided from the start, in particular over its entire length (die thickness).
  • a suitable measure must now be taken to ensure that the upper end of the longitudinal guide does not protrude beyond the upper end when the die is lowered, that is to say completely inserted into the receiving recess. This ensures that the workpiece resting on the die, for example a metal sheet, is not obstructed by the longitudinal guide and, of course, is also not obstructed by the transverse stop in can be shifted in any way within the XY plane.
  • a preferred embodiment of the invention provides that the transverse stop and the longitudinal guide are arranged on a displaceable element which assumes a raised displacement position when the die is attached and a lower displacement position when the die is lowered.
  • the displaceable element Before the die is inserted into the receiving recess, the displaceable element is brought into its raised position, so that both the transverse stop and the longitudinal guide assume the position required for the guided insertion.
  • the longitudinal guide is preferably at least twice as long as the die.
  • the stop counter surface of the die preferably extends over the entire die height. After inserting the die, you can also slide the sliding element downwards in the same direction. It is basically without disadvantage if both the die and the displaceable element are lowered together.
  • the stop element is designed as a displaceable and lockable bolt, the partial surface of the jacket assigned to the receiving recess of which forms or receives the transverse stop and the longitudinal guide.
  • the bolt preferably has a circular cross-section, but other types of cross-sections can also be used and can be quite advantageous.
  • the cross-stop and the longitudinal guide are located on the inside so that the cross-section of the stop element does not form a complete circular area.
  • the transverse stop advantageously also forms the longitudinal guide.
  • the stop counter surface is formed by a longitudinal groove-like recess in the die.
  • the longitudinal groove-like recess it is not necessary for the longitudinal groove-like recess to be delimited by an arc, but rather other cross-sectional shapes, in particular angular cross-sections, are also possible.
  • the bolt is of a particularly simple shape and is therefore easy to manufacture. The same also applies to the piping, in which the bolt is moved from its working position to a lowered position and vice versa.
  • the bolt can be locked at least in its lower displacement position by means of a holding device.
  • the locking can be carried out, for example, in such a way that the die is at the same time secured against lifting out, for example by friction.
  • the holding device for example an adjusting screw, can act on the latter transversely to the longitudinal axis of the bolt and thereby press it firmly against the counter surface of the die, which then creates the friction that can be used for securing at this point.
  • Another preferred embodiment is characterized by an intermediate member connected between the longitudinal guides and the die and displaceable in the lowering direction in the region of the receptacle, on which there is the transverse stop and a driving surface for the female member pointing counter to the lowering direction and that the die is indirectly connected with the intermediate member being interposed is guided in the longitudinal direction in the lowering direction.
  • the die is not lowered directly here, but with the interposition of the intermediate link along the longitudinal guide, i.e. inserted into the receiving recess.
  • the crosswise direction of the die is struck on the pontic, i.e. the transverse stop and the longitudinal guide are two separate surfaces in this variant, while in the previously described embodiment they can be formed by one and the same surface.
  • the intermediate link When the intermediate link is raised, its driving surface is approximately at the level of the upward-facing surface of the receptacle. You can thus move the die along this surface against the cross stop. As soon as the stop counter surface of the die has hit the latter, the die is also on or possibly slightly above the driving surface. However, it is more advantageous if the height of the intermediate member is chosen so that the die rests on the driving surface when it is slightly above the receiving recess. This means that the driving surface can also be slightly above the surface of the tool holder.
  • the intermediate member has an essentially bolt-like shape and that the longitudinal guide is a bore of the tool holder corresponding to the bolt cross-section.
  • the bore axis runs parallel to the die axis and thus also parallel to the working direction of the punch. So that the driving surface and the cross stop always have a correct assignment with respect to the tool holder, it is advantageous if the intermediate link is displaceable but non-rotatably supported. If the tool holder is in a removable machine part, the bearing hole for the intermediate link can also be provided therein.
  • the cross-sections of the receiving recess and the longitudinal guide overlap and the intermediate member to form the transverse stop and the driving surface has a recess at its upper end, the base area of which corresponds approximately to the overlap area and the height of which corresponds to the die thickness.
  • This recess can easily be made, for example, with the help of a cylindrical milling cutter or a disk milling cutter.
  • the production is somewhat more complex if, according to a further embodiment of the invention, the die carries a strip-shaped extension on its outer surface and the recess of the intermediate member has a cross-section corresponding to the longitudinal groove. Nevertheless, this shape is very advantageous because, in addition to the transverse stop, this also gives two side stops, which makes it particularly easy to center the die over the receiving recess.
  • a further development of the invention provides that the intermediate member can be lowered against the resistance of a return spring. If you hold the inserted die firmly, this also causes the pontic to be held in place again and again. Conversely, lifting of the inserted die is naturally prevented by holding the inserted intermediate member in a suitable manner.
  • the force of the spring can also be used, at least in a supportive manner, to lift the die out of the receiving recess.
  • the bolt mentioned in claim 3 can be slidably supported against the resistance of a return spring.
  • the intermediate member can be locked in a very advantageous manner, at least in its lower displacement position, by means of a holding device, which can be, for example, a screw.
  • a tool holder 1 of a punching machine which can be made in one piece with the machine table of the latter or manufactured separately and inserted into the machine table, has a receiving recess 2 for inserting a die 3, in particular flush, in the direction of the arrow 4.
  • the die is the lower part of at least one two-part, additionally comprising at least one punch.
  • the receiving recess is circular in shape and its depth corresponds to the height or thickness of the die 3 according to FIG. 2.
  • the receiving member is only open at the top, which is why the die, after prior alignment with the receiving recess, is exactly in the longitudinal direction Tool axis 5 must be inserted. Even if the die is slightly tilted, it is not possible to push it in because the fit is relatively tight.
  • a transverse stop 6 is provided, against which a stop counter surface 7 of the die can be brought into contact. It follows that the die is first brought in the direction of arrow 8 over the receiving recess 2 until the two surfaces mentioned abut each other. A guided lowering then takes place with the aid of a longitudinal guide 9.
  • the transverse stop and the longitudinal guide 9 are locally separated from one another.
  • an intermediate member 10 is connected between the longitudinal guide 9 and the die 3, on which the transverse stop 6 is located, and which is also displaceably mounted in the direction of arrow 4 in the tool holder or at least displaceably in the area thereof .
  • a driving surface 11 is provided on this intermediate member, which faces counter to the direction of insertion 4 and on which the die introduced in the direction of arrow 8 rests before being inserted into the receiving recess 2.
  • the intermediate member 10 has a substantially bolt-shaped shape and accordingly the longitudinal guide 9 is a bore in the receptacle 1, the cross section of which corresponds to that of the intermediate member.
  • the intermediate link is, however, provided over approximately half its length with a central blind hole 12 which receives a helical compression spring 13 which holds the intermediate link in its raised position, which can be seen in FIG. 1. Accordingly, the intermediate member is brought via the die 3 against the resistance of the helical compression spring 13 into the displacement end position shown in FIG. 2, in which the die has also reached its final assembly position. This final assembly position of the intermediate link and indirectly via this also of the die can be fixed and secured with the aid of a holding device 14, in particular a screw.
  • the die 3 carries on its outer surface a strip-shaped shoulder 15 which engages in a longitudinal groove 16 of the intermediate member 10.
  • the longitudinal groove is located at the inner end of a recess 17 at the upper end of the Intermediate member 10, and it extends just like the strip-shaped extension 15, in the insertion direction 4. Seen in this direction, the height of the recess 17 and the longitudinal groove 16 is equal to the height or thickness of the die 3.
  • the cross-sectional shape of the recess 17 corresponds to the overlap the cross sections of the receiving recess 2 and the longitudinal guide 9.
  • the exemplary embodiment is in each case circular cross sections.
  • the transverse stop 22 and the longitudinal guide 23 are arranged on a bolt 24 which can be displaced in the lowering direction 4, more precisely, formed by its outer jacket.
  • the stop counter surface is designated by 25 and it consists of a longitudinal groove-like recess 26 machined into the edge region of the die 3.
  • the bolt 24 is displaceable in a bore 27 of the tool holder 1 in the sense of the double arrow 28. It is a through hole, so that the bolt can be transferred from below by an actuator or in some other way to a raised position.
  • the transverse stop 22 formed by the upper bolt end and the longitudinal guide 23 formed by the same bolt surface are then located above the upper surface 29 of the tool holder 1.
  • the bolt looks at least by an amount corresponding to the thickness or height of the die 3 via the bore 27 out at the top. It can be held in this hole by friction. The lowering of the bolt is achieved either by being carried over the die 3 or by being moved separately after the die 3 has been completely pushed in.
  • the inner contour of the die can be shaped in any way, for example circular according to FIG. 3 or square according to FIG. 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (11)

1. Logement d'outil comprenant un évidement de logement (2) ouvert vers le haut, d'une poinçonneuse, dans lequel on enfonce une matrice (3) en l'abaissant, caractérisé par une butée transversale (6, 22) s'étendant dans la direction du mouvement d'abaissement (4) de la matrice (3) disposée dans la région du logement (1), dépassant celui-ci avant l'abaissement de la matrice (3) et un guide longitudinal (9, 23) pour la matrice (3), la butée transversale (6, 22) coopérant avec une surface complémentaire de butée (7, 25) de la matrice (3), située extérieurement et la matrice (3) pouvant être abaissée le long du guide longitudinal (9, 23) dans l'évidement de logement, et en ce que la matrice abaissée (3) passe à peu près au niveau de d'extrémité supérieure du guide longitudinal (9, 23) et de la butée transversale (6, 22) ou dépasse légèrement celui-ci ou celle-ci.
2. Logement d'outil selon la revendication 1, caractérisé en ce que la butée transversale (22) et le guide longitudinal (23) sont disposés sur un élément coulissant qui, lors de la butée de la matrice (3), occupe une position de coulissement soulevée et lorsque la matrice (3) est abaissée, une position de coulissement inférieure.
3. Logement d'outil selon la revendication 2, caractérisé en ce que l'élément de butée est conçu sous la forme d'un goujon (24) pouvant coulisser et être arrêté, dont la surface latérale partielle adjointe à l'évidement de logement (2) forme ou loge la butée transversale (22) et le guide longitudinal.
4. Logement d'outil selon la revendication 3, muni d'une butée transversale formée par une surface latérale et d'un guide longitudinal, caractérisé en ce que la surface complementaire de butée (25) est formée par un evidement (26) de la matrice (3), similaire à une rainure longitudinale.
5. Logement d'outil selon d'une des revendications 3 et 4, caractérisé en ce que le goujon (24) peut être arrêté, au moins dans sa position inférieure de coulissement, au moyen d'un dispositif de retenue (30).
6. Logement d'outil selon la revendication 1, caractérisé par un organe intermédiaire (10) interposé entre le guide longitudinal (9) et la matrice (3), pouvant coulisser dans le sens d'abaissement (4) dans la région du logement (1), sur lequel se trouvent la butée transversale (6) ainsi qu'une surface d'entraînement (11) de la matrice (3), tournée à l'envers du sens d'abaissement (4), et en ce que la matrice (3) est guidée indirectement dans le guide longitudinal (9), dans le sens d'abaissement, avec interposition de l'organe intermédiaire (10).
7. Logement d'outil selon la revendication 6, caractérisé en ce que l'organe intermédiaire (10) présente une constitution pratiquement en forme de goujon, et en ce que le guide longitudinal (9) est une perforation du logement (1), correspondant à la section du goujon.
8. Logement d'outil selon la revendication 7, caractérisé en ce que les sections de l'évidement de logement et du guide longitudinal se recoupent, et en ce que l'organe intermédiaire (10) présente à son extrémité supérieure, pour former la butée transversale (6) ainsi que la surface d'entraînement (11) un évidement (17) dont la surface de base correspond à peu près à la surface de recoupement et dont la hauteur correspond à peu près à l'épaisseur de la matrice.
9. Logement d'outil selon la revendication 8, caractérisé en ce que la matrice (3) porte à sa surface extérieure un appendice en forme de bande (15), et en ce que l'évidement (17) de l'organe intermédiaire (10) présente une rainure longitudinale (16) de section correspondante.
10. Logement d'outil selon au moins une des revendications 6 à 9, caractérisé en ce que l'organe intermédiaire (10) peut être abaissé contre la résistance d'un ressort de rappel (13).
11. Logement d'outil selon au moins une des revendications 6 à 10 caractérisé en ce que l'organe intermédiaire (10) peut être arrêté, au moins dans sa position inférieure de coulissement, au moyen d'un dispositif de retenue (14).
EP84106292A 1983-06-09 1984-06-01 Porte-outil inférieur d'une machine emporte-pièce, destiné surtout à l'introduction d'une matrice Expired EP0128486B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3320825 1983-06-09
DE19833320825 DE3320825A1 (de) 1983-06-09 1983-06-09 Untere werkzeugaufnahme einer stanzmaschine zum einschieben insbesondere einer matrize

Publications (2)

Publication Number Publication Date
EP0128486A1 EP0128486A1 (fr) 1984-12-19
EP0128486B1 true EP0128486B1 (fr) 1987-02-04

Family

ID=6201034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106292A Expired EP0128486B1 (fr) 1983-06-09 1984-06-01 Porte-outil inférieur d'une machine emporte-pièce, destiné surtout à l'introduction d'une matrice

Country Status (4)

Country Link
US (1) US4570327A (fr)
EP (1) EP0128486B1 (fr)
JP (1) JPS6046826A (fr)
DE (1) DE3320825A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062337A (en) * 1989-05-12 1991-11-05 Strippit, Inc. Indexable multi-tool for punch press
US5042352A (en) * 1990-06-04 1991-08-27 Strippit, Incorporated Quick change tool holder
US6782787B2 (en) * 2001-08-02 2004-08-31 Wilson Tool International, Inc. Adjustable punch having externally accessible rotation release latch
NL1022122C2 (nl) * 2002-12-10 2004-06-11 Fico Bv Werkwijze voor het losmaken van schrot na het ponsen en ponsmachine.
FR2889978B1 (fr) * 2005-08-31 2008-10-17 Adiapress Sarl Dispositif de montage de poincons avec insert notamment pour machine utilisant la transformation de l'energie adiabetique
US7779665B2 (en) * 2006-10-30 2010-08-24 Wilson Tool International Inc. Press brake die holder technology
US7874194B2 (en) * 2007-03-09 2011-01-25 Wilson Tool International Inc. Die holder technology for metal-fabricating press
US20090320550A1 (en) * 2008-06-27 2009-12-31 Lee Brian J Anti-Vibration Die Holder Technology for Fabricating Press
JP2011020249A (ja) * 2009-07-13 2011-02-03 K D K Kk 工業用刃物の取替えユニット
US9782818B2 (en) 2011-06-08 2017-10-10 Wilson Tool International Inc. Die shoe assembly with bearing surface mechanism, and die for use therewith
CN112276617B (zh) * 2020-10-20 2022-06-21 台州聚源机械制造有限公司 一种防护性高且可调限位强度的机械加工用夹持机构

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US1387339A (en) * 1920-05-17 1921-08-09 Robert H Banister Tool-holder
GB327010A (en) * 1929-03-26 1930-03-27 Ernst Dietrich Improvements relating to machines for perforating, cutting or stamping metal or other sheets
DE1502924A1 (de) * 1965-11-03 1969-05-08 Ernst Raulf Fabrik Fuer Eisen Passfeder sowie Verfahren und Vorrichtung zur Herstellung von Passfedern
CH548816A (de) * 1970-09-04 1974-05-15 Trumpf & Co Werkzeugaufnahme.
US3673908A (en) * 1971-01-22 1972-07-04 Intern Fineblanking Corp Quick-change tooling for fineblanking presses
US3719117A (en) * 1971-07-29 1973-03-06 W Scott Punch holder
US3797352A (en) * 1973-01-26 1974-03-19 Dayton Progress Corp Apparatus for keying and locking elements to their retainers
US4214496A (en) * 1978-10-06 1980-07-29 Gulf & Western Manufacturing Company Shock dampening systems for presses
AT368726B (de) * 1980-05-12 1982-11-10 Kubalek Miroslav Einrichtung zum einpressen eines zentrierloches in die stirnflaeche von wellen od. dgl. drehlingen aus zaehem material

Also Published As

Publication number Publication date
EP0128486A1 (fr) 1984-12-19
JPS6046826A (ja) 1985-03-13
DE3320825A1 (de) 1984-12-13
US4570327A (en) 1986-02-18

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