EP3475010B1 - Presse à percer - Google Patents

Presse à percer Download PDF

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Publication number
EP3475010B1
EP3475010B1 EP17736591.3A EP17736591A EP3475010B1 EP 3475010 B1 EP3475010 B1 EP 3475010B1 EP 17736591 A EP17736591 A EP 17736591A EP 3475010 B1 EP3475010 B1 EP 3475010B1
Authority
EP
European Patent Office
Prior art keywords
cap
perforating
workpiece
upsetting
deformation
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.)
Active
Application number
EP17736591.3A
Other languages
German (de)
English (en)
Other versions
EP3475010A1 (fr
Inventor
David Hüsgen
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3475010A1 publication Critical patent/EP3475010A1/fr
Application granted granted Critical
Publication of EP3475010B1 publication Critical patent/EP3475010B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/04—Piercing presses

Definitions

  • the invention relates to a piercing press according to the preamble of claim 1.
  • Hole presses are known from the production of seamless pipes, by means of which steel billets for further processing e.g. be provided with a hole on a push bench. It is known to first pre-compress the billet by means of a compression cap in order to fit the billet into a receptacle. The billet is then perforated using a perforated cap. The compression cap and the perforated cap are each received on separate cross members, which are each advanced by separate drives.
  • DE 31 49 400 A1 describes a piercing press with a one-piece, cylindrical piercing mandrel, the end of the piercing mandrel acting directly on the workpiece to be pierced.
  • the end of the piercing mandrel acting on the workpiece is guided directly in an annular compression cap, at least in a section of the movement.
  • the compression cap and the perforated cap are each received on separate cross members.
  • U.S. 2,812,673 A describes a piercing press comprising a piercing mandrel provided with a perforated cap and a hollow-cylindrical compression cap.
  • the compression cap and the perforated cap are each received on separate cross members and are moved by separate hydraulic drives.
  • the preamble of claim 1 is based on this document.
  • the overall height can be achieved by around 25% compared to conventional piercing presses with separate drive elements for upsetting force and piercing force.
  • a frame of the punch press can also be made more rigid and the dimensional accuracy of the formed workpiece can be increased.
  • a moving mass of the piercing press can also be significantly reduced.
  • a piercing press in the sense of the invention can generally be used for hot or cold forming of workpieces of any material. It is preferably a hole press for hot forming a workpiece made of steel.
  • the piercing press is particularly preferably part of a production system for producing seamless pipes, in particular made of steel.
  • the workpiece punched in the punch press is preferably transferred to subsequent processing, for example a push bench, rolling mill or the like, at the same heat.
  • the workpiece can initially have any shape, for example as a full cylinder or as a square billet.
  • a drive element within the meaning of the invention is any actuator for exerting a force in a linear direction that is sufficient to deform the workpiece.
  • the drive member preferably comprises a hydraulic cylinder.
  • a compression cap and a perforated cap are preferably components that come into direct contact with the workpiece for deformation and experience corresponding mechanical loads and wear.
  • a transducer is a hollow mold into which the workpiece is introduced, with it being supported on the hollow mold in the course of the deformation. Due to the associated wear, the sensor can preferably have an exchangeable inner wall, for example in the manner of an exchangeable sleeve.
  • the second deformation or perforation of the workpiece can take place as a rising or filling deformation in the transducer, depending on the requirements.
  • An increasing deformation is preferably provided.
  • a frictional connection between the compression cap and the drive member can be established via a releasable coupling member.
  • the coupling element can be designed as a mechanical component in various ways in order to enable releasable coupling, for example as a rod, toggle lever, link, cam or the like. It is generally preferred that the coupling and decoupling of the coupling element is operated automatically.
  • the coupling element comprises at least one coupling rod that can be attached between a cross-member and the compression cap.
  • the attached coupling rod forms a simple and highly stable means of force transmission from the crossbeam to the compression cap.
  • the traverse only acts on the perforated cap via the piercer and no longer on the compression cap.
  • the attachment and removal of the coupling rod can be preferred take place automatically, for example via a manipulator.
  • the coupling rod can have the form of a partial sleeve in order to at least partially surround the piercer.
  • the punch press has only one cross member overall. This makes the design of the piercing press considerably simpler and cheaper.
  • a traverse is understood to mean a component that is movably guided with respect to a frame of the press and transmits at least a large part of a forming force.
  • the compression cap is slidably guided on the piercer. In addition to a simple mechanical implementation of the invention, this also allows the compression cap to be used to guide the piercer.
  • the upsetting cap has an upsetting surface that is aligned with the perforated cap, the first deformation taking place by joint pressing of the upsetting surface and the perforated cap against the workpiece.
  • the second deformation can be continued without reattaching the perforated cap.
  • the compression cap is guided displaceably in the receptacle. This allows an exact alignment of both the compression cap and the piercing mandrel and the perforated cap connected to it.
  • the piercing pin and thus the perforated cap are guided transversely over the wall of the transducer during the piercing process, the compression cap functioning as an external and internal intermediate member between the piercing mandrel and the wall of the transducer.
  • the compression cap rests against the workpiece without force during the second deformation and is moved in the transducer with the deformation of the workpiece. This is particularly important with increasing deformation an optimal position of the compression cap in each case with regard to guiding the piercer is ensured.
  • the compression cap guides the piercer relative to the receiver during the second reshaping. This prevents the perforated cap from migrating and the dimensional accuracy of the perforated workpiece is significantly improved.
  • a shear ring is arranged on the pick-up, a bottom of the perforated workpiece being cut off by means of the shear ring. Overall, this allows the production of a dimensionally accurate hollow cylinder by means of the piercing press.
  • FIGS. 1 to 6 shows a piercing press according to the invention in different, chronologically consecutive operating states.
  • the punch press comprises a receiver 1, in which a workpiece 2 can be inserted.
  • the transducer 1 is shaped as a hollow cylinder, oriented vertically with respect to an axis of the hollow cylinder and has an inner wall in the form of a sleeve 1a that can be changed for maintenance purposes.
  • the workpiece is inserted into the transducer by a manipulator (not shown).
  • the workpiece consists of a steel and is at a temperature for hot forming.
  • the counter holder 3 At the bottom of the pickup 1 there is a counter holder 3 which supports the workpiece 2 from below.
  • the counter holder 3 can be removed at the end of a forming process or for maintenance purposes. In the attached state, the counter holder has the function of a rigid and immovable bottom of the transducer 1.
  • a piercer 4 is received on a drivably movable cross member 5.
  • the traverse 5 is slidably mounted on guides, not shown, of a frame.
  • a drive element 6 of the piercing press is formed in the present case by the crossbeam and a hydraulic cylinder 6 acting on the crossbeam.
  • the traverse 5 is moved by the hydraulic cylinder in the direction of extension of the piercer. In the present case, the traverse 5 is the only traverse of the punch press.
  • the piercing mandrel 4 has an exchangeable perforated cap 7 on its end facing the workpiece 2.
  • a compression cap 8 surrounds the piercer 4 in the manner of a ring and is guided on the piercer 4 so as to be displaceable. In a lower position of the compression cap 8, this is held by the perforated cap 7 as a stop. In this position (see e.g. Fig. 1 ) a compression surface 8a of the compression cap 8 facing the workpiece and an active surface 7a of the perforated cap 7 facing the workpiece are aligned.
  • An outer circumference of the compression cap 8 is also dimensioned such that the compression cap 8 is guided displaceably in the receptacle 1.
  • a play between the transducer wall and the compression cap 8 is selected so that mobility is guaranteed with the most precise guidance possible even at the temperatures that occur.
  • the compression cap 8, which is movable on the piercer 4, can be releasably fixed in the lower position by means of a coupling member in the form of a coupling rod 9 (see FIG Fig. 2 ).
  • the coupling rod 9 is inserted between an upper side of the upsetting cap 8 and the cross member 5 or the drive member of the punch.
  • the coupling rod 9 is shaped like a sleeve open on one side and partially surrounds the piercer for the purpose of better force distribution.
  • the coupling rod has an essentially part-circular cross section. In other embodiments, elliptical, polygonal or other cross-sectional shapes can also be present.
  • the coupling rod can also consist of several sub-rods that are attached to different positions on the circumference of the piercer.
  • the coupling rod, the piercer and the compression cap each run coaxially to one another.
  • the coupling rod 9 is inserted and removed by means of an automated manipulator, which is not shown here.
  • a shear ring 10 is arranged in the lower end region of the transducer 1 above the counter holder 3. By means of the shear ring 10, a bottom of the then perforated workpiece can be pierced at the end of the forming process.
  • a workpiece heated to the forming temperature for example in the form of a steel billet, is inserted into the transducer 1.
  • the compression cap 8 is initially decoupled from the drive member 5, 6 or the coupling rod 9 does not engage.
  • the piercer 4 with the perforated cap 7 and the compression cap 8 is moved into the receptacle 1 until the compression surface 8a and the active surface 7a are in contact with the workpiece 2 (see FIG Fig. 3 ).
  • the coupling rod 9 is then removed and the compression cap 8 is thus decoupled from the drive element 5, 6 in order to enable a second deformation or the actual perforation of the workpiece 2 (see FIG Fig. 5 ).
  • Fig. 6 the piercing mandrel 4 with the perforated cap 7 is now advanced further so that the perforated cap 7 perforates the workpiece 2 in the course of extrusion.
  • an upper edge of the workpiece rises in accordance with the displaced material in the transducer 1 (rising perforation).
  • the compression cap 8, which is freely displaceable on the piercer 4 is pressed upwards with the edge of the workpiece.
  • the upsetting cap continuously exercises a leading function for the piercing mandrel 4, so that the perforated cap 7 is optimally prevented from moving sideways.
  • the piercing pin and thus the perforated cap are guided transversely during the over the wall of the transducer 1, the compression cap 8 functioning as an outside and inside leading intermediate member between the piercing mandrel 4 and the wall of the transducer 1.
  • the perforated cap is pressed through the shear ring 10, the counter holder being moved back if necessary. This allows a remaining bottom of the workpiece 2 to be removed so that a complete perforation is achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Claims (9)

  1. Presse de perforation qui comprend :
    un dispositif de réception (1) réalisé en particulier sous la forme d'un cylindre creux, destiné à la réception d'une pièce à usiner (2) ;
    un capuchon d'écrasement (8) ;
    dans laquelle le capuchon d'écrasement (8) peut être comprimé, pour obtenir une première déformation de la pièce à usiner (2), avec une force d'écrasement qui s'exerce sur la pièce à usiner (2) ; et
    un capuchon de perforation (7) disposé contre un mandrin de perforation (4) ;
    dans laquelle le capuchon de perforation (7) peut être enfoncé par compression, afin d'obtenir une deuxième déformation de la pièce à usiner (2) avec une force de perforation, dans la pièce à usiner (2) ;
    caractérisée
    en ce que, aussi bien la force d'écrasement du capuchon d'écrasement (8) que la force de perforation du capuchon de perforation (7), s'exercent au moyen d'un élément d'entraînement commun (5, 6) ; dans laquelle la presse de perforation ne présente au total qu'une seule traverse (5).
  2. Presse de perforation selon la revendication 1, caractérisée en ce que l'on peut mettre en place une liaison par force entre le capuchon d'écrasement (8) et l'élément d'entraînement (5, 6) par l'intermédiaire d'un élément d'accouplement amovible (9).
  3. Presse de perforation selon la revendication 2, caractérisée en ce que l'élément d'accouplement comprend au moins une barre d'accouplement (9) qui peut venir se disposer entre une traverse (5) et le capuchon d'écrasement (8).
  4. Presse de perforation selon l'une quelconque des revendications précédentes, caractérisée en ce que le capuchon d'écrasement (8) est guidé de manière à pouvoir se déplacer sur le mandrin de perforation (4).
  5. Presse de perforation selon la revendication 4, caractérisée en ce que le capuchon d'écrasement (8) présente une surface d'écrasement (8a) qui vient se disposer à fleur avec le capuchon de perforation (7) ; dans laquelle la première déformation a lieu par l'intermédiaire d'une compression commune de la surface d'écrasement (8a) et du capuchon de perforation (7) contre la pièce à usiner (2).
  6. Presse de perforation selon la revendication 4 ou 5, caractérisée en ce que le capuchon d'écrasement (8) est guidé d'une manière à pouvoir se déplacer dans le dispositif de réception (1).
  7. Presse de perforation selon l'une quelconque des revendications 4 à 6, caractérisée en ce que le capuchon d'écrasement (8), au cours de la deuxième déformation, vient s'appliquer en l'absence d'une force, contre la pièce à usiner (2) et est mis en mouvement de manière conjointe avec la déformation de la pièce à usiner (2) dans le dispositif de réception (1).
  8. Presse de perforation selon l'une quelconque des revendications 4 à 7, caractérisée en ce que, par l'intermédiaire du capuchon d'écrasement (8), au cours de la deuxième déformation, on obtient un guidage du mandrin de perforation (4) par rapport à le dispositif de réception (1).
  9. Presse de perforation selon l'une quelconque des revendications précédentes, caractérisée en ce que, contre le dispositif de réception (1), vient se disposer une bague de cisaillement (10) ; dans laquelle une base de la pièce à usiner (2) munie d'un trou central est séparée au moyen de la bague de cisaillement (10).
EP17736591.3A 2016-06-28 2017-06-27 Presse à percer Active EP3475010B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016211597.9A DE102016211597A1 (de) 2016-06-28 2016-06-28 Lochpresse
PCT/EP2017/065870 WO2018002060A1 (fr) 2016-06-28 2017-06-27 Presse à percer

Publications (2)

Publication Number Publication Date
EP3475010A1 EP3475010A1 (fr) 2019-05-01
EP3475010B1 true EP3475010B1 (fr) 2020-11-25

Family

ID=59295173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17736591.3A Active EP3475010B1 (fr) 2016-06-28 2017-06-27 Presse à percer

Country Status (4)

Country Link
EP (1) EP3475010B1 (fr)
CN (1) CN109414752B (fr)
DE (1) DE102016211597A1 (fr)
WO (1) WO2018002060A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149400A1 (de) * 1980-12-18 1982-09-09 Mannesmann AG, 4000 Düsseldorf Presse zum bearbeiten von metallteilen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765528A (en) * 1951-08-22 1956-10-09 Comptoir Ind Etirage Method of perforating a heated billet and disc
US2812673A (en) * 1953-08-14 1957-11-12 Babcock & Wilcox Co Mandrel guiding arrangement for billet piercing apparatus
US3345853A (en) * 1965-03-23 1967-10-10 Babcock & Wilcox Co Work feeding method and apparatus for piercing press
JPS5662638A (en) * 1979-10-23 1981-05-28 Kobe Steel Ltd Piercing method
CN101690965B (zh) * 2009-10-10 2011-05-04 济南中森机械制造有限公司 半轴套管热挤压成形工艺及专用装置
DE102014014042B4 (de) * 2014-09-26 2018-08-02 Sms Group Gmbh Mehrachsige Schmiedepresse sowie Verfahren zum Betrieb einer mehrachsigen Schmiedepresse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149400A1 (de) * 1980-12-18 1982-09-09 Mannesmann AG, 4000 Düsseldorf Presse zum bearbeiten von metallteilen

Also Published As

Publication number Publication date
EP3475010A1 (fr) 2019-05-01
WO2018002060A1 (fr) 2018-01-04
CN109414752B (zh) 2020-06-12
CN109414752A (zh) 2019-03-01
DE102016211597A1 (de) 2017-12-28

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