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EP0319979B1 - Dispositif de formation d'un objet cylindrique creux en tôle, par exemple une ébauche pour poulie - Google Patents

Dispositif de formation d'un objet cylindrique creux en tôle, par exemple une ébauche pour poulie Download PDF

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Publication number
EP0319979B1
EP0319979B1 EP88120547A EP88120547A EP0319979B1 EP 0319979 B1 EP0319979 B1 EP 0319979B1 EP 88120547 A EP88120547 A EP 88120547A EP 88120547 A EP88120547 A EP 88120547A EP 0319979 B1 EP0319979 B1 EP 0319979B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
metal body
inner cylinder
support
brake
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 - Lifetime
Application number
EP88120547A
Other languages
German (de)
English (en)
Other versions
EP0319979A1 (fr
Inventor
K. Gerd Dipl.-Ing. Friedrichs
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.)
TEWIG GMBH TECHNISCHE ENTWICKLUNGS-GESELLSCHAFT
Original Assignee
Tewig Technische Entwicklungs-Gesellschaft 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6342137&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0319979(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tewig Technische Entwicklungs-Gesellschaft GmbH filed Critical Tewig Technische Entwicklungs-Gesellschaft GmbH
Publication of EP0319979A1 publication Critical patent/EP0319979A1/fr
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Publication of EP0319979B1 publication Critical patent/EP0319979B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
    • B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/261—Making other particular articles wheels or the like pulleys

Definitions

  • EP-A-0390828 which relates to the same invention as described here, but relates to other contracting states.
  • the invention relates to a device according to the preamble of claim 1 and the preamble of claim 12 for forming a rotationally symmetrical sheet metal body.
  • a device of this type is already known from FR-A-2116373.
  • Sheet metal bodies with a central sheet metal body axis which has an outer surface coaxial to the sheet metal body axis with an U-shaped cross section open to the outside, often serve as a blank for the production of pulleys.
  • a tin pot is first pressed out of a sheet metal disc, the outer surface of which initially corresponds to a smooth cylinder jacket. Then a U-shaped profile open to the outside is rolled into the cylinder jacket, in which the desired profile is embossed in a further manufacturing step.
  • the sheet metal body is clamped rotatably and acted upon by a rotatably mounted, disk-shaped tool, the tool and the sheet metal body rolling onto one another.
  • the width of the tool is dimensioned such that it comes between the two U-legs when the feed is transverse to the sheet metal body axis.
  • the desired profile depth is obtained by several complete revolutions of the sheet metal body with simultaneous tool feed.
  • the sheet metal body If the sheet metal body is subjected to radial pressure with the tool, the sheet metal tends to bear this pressure to avoid by forming a backwater in front of the point of intervention. This can lead to runout inaccuracies that must be corrected again.
  • the back pressure is dependent on the size of the opening angle between the end faces of the sheet metal body and the tool. The larger the opening angle, the greater the back pressure. Due to the frontal engagement, the opening angle cannot be reduced in the desired manner due to the design.
  • the invention has for its object to provide a device of the type mentioned, with which a reduction in the opening angle can be achieved.
  • the invention has the advantage that the associated opening angle can be optimally reduced by the engagement of an inner and an outer cylinder.
  • Another particularly great advantage can be seen in the fact that the sheet metal body can be arranged in a rotationally fixed manner, since the tool circles around the workpiece during the stamping process.
  • the relatively complex rotatable mounting of the workpiece can therefore be dispensed with.
  • the workpiece had to be arranged on the free end of a shaft, or two shaft ends, which are mutually under axial prestress, whereby a deflection of the shaft end when the tool was laterally pressurized could not be ruled out.
  • a rotatable Counter bearings can be provided for the cavity of the sheet metal body.
  • the entire device is simplified in that there is no need to have a separate workpiece drive and no synchronization with the tool drive.
  • the rotationally fixed mounting of the workpiece also facilitates the attachment and operation of a cooling device, so that the heat occurring during the deformation can be dissipated from the workpiece in a simple manner.
  • the invention takes advantage of the idea that the tool feed and the retraction of the tool between the two U-legs of the sheet metal body or the opposite movement can be carried out by a relative movement between the inner eccentric and the carrier which can be controlled in a simple manner.
  • a preferred development of the invention is that it is provided with an interchangeable chuck for receiving different tool rings. This has the advantage that the changeover to different sheet metal diameters or poly-V profiles can be carried out in a simple manner and in a short time.
  • the interchangeable chuck can therefore be provided with different tool inner rings.
  • the inner eccentric and the carrier are resiliently biased against a relative movement. This optionally ensures that the inner eccentric is returned to the working position in which it is in engagement with the sheet metal body, or to a release position in which the device can be fitted.
  • a preferred arrangement can be seen in that the inner eccentric by the spring in the Starting position is maintained, and that there is a brake acting against the Pederkraft, the inner eccentric brake. If the brake is actuated, the desired deflection of the inner eccentric relative to the outer eccentric takes place. It is therefore a force-controlled system which can be implemented and operated in a simple manner.
  • the control of the device is further simplified in that the brake with a limit switch. This has the advantage that the brake releases when a predetermined deflection or a predetermined tool feed is reached and the inner eccentric is returned to the starting position due to its preload.
  • a particularly effective and simple implementation of the brake is that it is designed as an eddy current brake.
  • the brake can also be expedient for the brake to be designed as a mechanical brake, preferably as a shoe brake.
  • a pot-shaped sheet metal body 1 which is arranged in a rotationally fixed manner overall, is illustrated, which serves as a blank for a drive wheel, for example a poly-V pulley. It has a disk part 3 arranged concentrically to a sheet metal body axis 2, on the outer circumference of which a cylindrical jacket is arranged which is coaxial with the sheet metal body axis 2 and which has a U-shaped cross section open to the outside.
  • the two U-legs 5 serve as lateral boundaries of a tread 6, which is formed by the cylinder jacket part connecting the two U-legs 5.
  • a tool designed as an inner cylinder 7 with the corresponding negative poly-V profile is rotatably arranged around the sheet metal body 1.
  • 1 shows a starting position in which the inner cylinder 7 is located outside the U-leg 5. It is clear that the sheet metal body 1 can be brought into the inner cylinder 7 unhindered in this starting position.
  • Fig. 2 illustrates a working position in which the inner cylinder 7 is radially offset from the starting position in such a way that it is located on one side of the sheet metal body 1 between the U-legs 5, so that the poly-V profile 8 with the tread 6 comes into engagement.
  • the longitudinal axis 9 of the inner cylinder 7 comes to lie next to the sheet metal body axis, ie the inner cylinder 7 rotates eccentrically around the sheet metal body 1 during a rotation. In this way, the rolls Inner cylinder 7 on the sheet metal body 1 with the formation of a poly-V profile on the tread 6.
  • an interchangeable chuck 12 is also shown as an example, which receives the inner cylinder 7, which is designed as a circular ring.
  • the interchangeable chuck 12 allows the inner cylinder to be exchanged if a change in the profile or the inner diameter is desired.
  • the interchangeable chuck 12 is part of a carrier designed as a disk 14, which is described in connection with FIGS. 4 and 5.
  • the working position is shown in a side view.
  • the U-legs 5 are cut away in the area of the point of engagement of the inner cylinder 7 with the tread 6.
  • An opening angle between the running surface 6 of the sheet metal body 1 and the inner cylinder 7 is provided with the reference number 10. It is clear that the opening angle 10 becomes smaller the more the radii of the inner cylinder 7 and the tread 7 adapt. It can also be seen that the minimum radius of the inner cylinder 7 is determined by the outer radius of the U-legs 5.
  • FIGS. 4 and 5 illustrate how the inner cylinder 7 is driven and a radial feed is applied.
  • the inner cylinder 7 is located on an inner eccentric 11 eccentrically to its axis of rotation 15, via which it is rotatably mounted on the disk 14.
  • the disk 14 is arranged rotatably about the sheet metal body axis 2.
  • the axis of rotation 15 of the inner eccentric 11 is offset from the sheet metal body axis 2.
  • the inner eccentric 11 In the starting position shown, the inner eccentric 11 is rotated so that the inner cylinder 7 releases the sheet metal body 1 in the axial direction.
  • the angular position in this starting position is determined by a stop 17.
  • the inner eccentric 11 is held in this position with respect to the disk 14 by means of a spring 18.
  • a spring 18 When the disk 14 rotates, its axis of rotation 15 moves on a circular path 20 about the sheet metal body axis 2.
  • the inner cylinder 7 comes into engagement with the sheet metal body 1, as illustrated in FIG. 5.
  • the longitudinal axis 9 of the inner cylinder 7 rotates on a circular path 13 coaxially to the sheet metal body axis 2.
  • the inner cylinder 11 rolls on the fixed sheet metal body 1.
  • the maximum rotation of the inner eccentric 11 relative to the disk 14 is determined by a further stop 21.
  • the angular rotation of the inner eccentric 11 with respect to the disk 14 is achieved by a brake acting on the inner eccentric 11, which is designed such that it acts on the inner eccentric 11 regardless of the position and exerts a torque.
  • a brake acting on the inner eccentric 11 which is designed such that it acts on the inner eccentric 11 regardless of the position and exerts a torque.
  • it can be designed as a flying shoe brake. With a view to It is not shown clearly in the figures. If a torque in the clockwise direction is exerted on the inner eccentric 11 when the disk 14 is rotated counterclockwise, it executes a rotation about its axis of rotation 15 according to arrow 16, being deflected against the spring force until further deflection by the further stop 21 is prevented.
  • the disk 14 is driven in the example shown via a cylindrical worm 23, the teeth of which are in engagement with a corresponding toothing on the cylindrical end face of the disk 14.
  • the desired inner cylinder 7 is rotatably attached to the inner eccentric 11 with the help of the changeable chuck 12.
  • the disk 14 is driven via the worm 23 and set in rotation about the sheet metal body axis 2. As long as the inner eccentric 11 bears against the stop 17, it rotates eccentrically around the sheet metal body 1 without the inner cylinder 7 touching the sheet metal body 1.
  • the inner cylinder 7 is displaced by a deflection of the inner eccentric 11 on a circular path located further out, so that the poly-V profile 8 comes into engagement with the tread 6. Due to the rotary bearing of the inner cylinder 11, there is no relative movement between the inner cylinder 11 and the running surface 6.
  • the invention is defined by the independent claims and not only limited to such a blank shape. It is also possible to produce a pot from a disc-shaped blank (not shown) by means of an inner cylinder tool, the inner cylinder tool having an essentially semicircular hollow profile instead of the poly-V profile shown in FIG. 1. Analogously, further processing such as upsetting, splitting, drawing in, polishing and the like can also be carried out. be carried out using appropriate tools.
  • the inner eccentric can also be designed as a lever arm which is articulated on the disk 14 so as to be angularly displaceable.
  • the inner eccentric prefferably be designed as a slide which is arranged on the disk 14 so as to be radially displaceable on a straight path.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Pulleys (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
  • Press Drives And Press Lines (AREA)

Claims (12)

1. Dispositif pour transformer un corps en tôle (1) présentant une symétrie de rotation ayant un axe central (2) et un outil à matricer monté à rotation, comme cylindre intérieur (7), l'outil à matricer roulant dans la direction périphérique sur la surface extérieure du corps en tôle (1) et un support (14) d'entraînement en rotation, monté coaxialement à l'axe (2) du corps en tôle, support qui porte de manière excentrée, l'axe de rotation (15) du cylindre intérieur (7), dispositif caractérisé en ce que:
― le cylindre intérieur (7) est réalisé en forme d'ébauche de poulie à courroie pour assurer sa déformation, le cylindre intérieur (7) étant en outre réalisé sur un excentrique intérieur (11) monté de manière excentrique par rapport à l'axe (2) du corps en tôle sur le support,
― l'axe (11) de l'excentrique est monté sur le support (14) sur un point de rotation (15) excentré par rapport à l'axe (2) du corps en tôle, et,
― il est prévu un dispositif pour faire tourner l'excentrique intérieur (11) suivant un angle de rotation prédéterminé, par rapport au support (14) pour modifier l'excentricité de l'excentrique intérieur, par rapport au support (14).
2. Dispositif selon la revendication 1, caractérisé en ce que la rotation de l'excentrique (11) est limitée par des butées (17, 21).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'excentrique intérieur (11) est en forme de disque circulaire, monté dans un palier de forme circulaire de l'excentrique extérieur (14).
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le support est en forme de disque (14) entraîné à sa périphérie par une vis (23).
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'excentrique intérieur et le disque (11, 14) sont précontraints, de manière élastique vis-à-vis des mouvements relatifs.
6. Dispositif selon la revendication 5, caractérisé en ce que l'excentrique intérieur (11) est maintenu en position de repos par des ressorts (18) et il comporte un frein agissant contre la force de ressort pour solliciter l'excentrique intérieur (11).
7. Dispositif selon la revendication 5, caractérisé par un commutateur de fin de course qui relâche le frein après un débattement prédéterminé de l'excentrique intérieur (11).
8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que le frein est un frein à courants de Foucault.
9. Dispositif selon la revendication 6 ou 7, caractérisé en ce que le frein est un frein mécanique.
10. Dispositif selon la revendication 9, caractérisé en ce que le frein est un frein à mâchoire.
11. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'excentrique intérieur (11) est en forme de bras de levier qui est articulé sur le disque (14) de manière à permettre un décalage angulaire.
12. Dispositif pour transformer d'un corps en tôle (1) présentant une symétrie en rotation et ayant un axe centré (2), par exemple une ébauche de poulie à courroie et un outil à matricer en forme de cylindre intérieur (7), monté en rotation, outil à matricer roulant dans la direction périphérique sur la surface extérieure du corps en tôle (1), et un support (14) coaxial à l'axe (2) du corps en tôle, monté pour l'entraînement en rotation et qui porte de manière excentrée, l'axe de rotation du cylindre intérieur (7), dispositif caractérisé en ce que:
― le cylindre intérieur (7), est réalisé en forme d'ébauche de poulie à courroie, pour assurer sa déformation,
― le cylindre intérieur (7) est en outre réalisé comme coulisseau monté, coulissant radialement, suivant une trajectoire rectiligne sur le support (14), et
― il est prévu un dispositif d'entraînement (23) pour déplacer le coulisseau d'une course prédéterminée par rapport au support (14), pour modifier l'excentricité du cylindre intérieur (7) par rapport au support (14).
EP88120547A 1987-12-08 1988-12-08 Dispositif de formation d'un objet cylindrique creux en tôle, par exemple une ébauche pour poulie Expired - Lifetime EP0319979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3741596A DE3741596C3 (de) 1987-12-08 1987-12-08 Vorrichtung zum Herstellen eines Profils an einem rotationssymmetrischen Blechrohling
DE3741596 1987-12-08

Publications (2)

Publication Number Publication Date
EP0319979A1 EP0319979A1 (fr) 1989-06-14
EP0319979B1 true EP0319979B1 (fr) 1991-09-25

Family

ID=6342137

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89900228A Expired - Lifetime EP0390828B1 (fr) 1987-12-08 1988-12-07 Dispositif de formage de corps en tole a symetrie de rotation, par exemple des ebauches de poulies
EP88120547A Expired - Lifetime EP0319979B1 (fr) 1987-12-08 1988-12-08 Dispositif de formation d'un objet cylindrique creux en tôle, par exemple une ébauche pour poulie

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89900228A Expired - Lifetime EP0390828B1 (fr) 1987-12-08 1988-12-07 Dispositif de formage de corps en tole a symetrie de rotation, par exemple des ebauches de poulies

Country Status (6)

Country Link
EP (2) EP0390828B1 (fr)
JP (1) JPH03502663A (fr)
AT (1) ATE68381T1 (fr)
DE (2) DE3741596C3 (fr)
ES (1) ES2026988T3 (fr)
WO (1) WO1989005203A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904241A1 (de) * 1989-02-13 1990-08-16 Tewig Gmbh Vorrichtung zum herstellen eines profils an einem vortopf
DE3936200C1 (fr) * 1989-10-31 1990-12-13 Leifeld Gmbh & Co, 4730 Ahlen, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750476C (de) * 1940-07-17 1945-01-15 Boerdel- und Siekenmaschine, insbesondere fuer Blechdosen
DE2060024A1 (de) * 1970-12-05 1972-06-08 Kabel Metallwerke Ghh Verfahren zur Herstellung ringfoermig gewellter Metallrohre
DE2732263A1 (de) * 1977-07-16 1979-02-01 Schuler Gmbh L Vorrichtung zum herstellen einer sicke am umfang eines hohlzylinders
JPS5912375B2 (ja) * 1980-12-27 1984-03-22 合資会社金光銅工「鎔」接所 板金製ポリｖプ−リの製造方法
JPS58110146A (ja) * 1981-12-24 1983-06-30 Kanemitsu Doukou Yousetsushiyo:Goushi 板金製ポリｖプ−リ及びその製造方法

Also Published As

Publication number Publication date
DE3741596C3 (de) 1995-05-18
JPH03502663A (ja) 1991-06-20
WO1989005203A1 (fr) 1989-06-15
DE3741596C2 (fr) 1991-01-10
EP0390828B1 (fr) 1991-10-16
DE3741596A1 (de) 1989-06-08
ATE68381T1 (de) 1991-11-15
EP0319979A1 (fr) 1989-06-14
EP0390828A1 (fr) 1990-10-10
DE3865680D1 (de) 1991-11-21
ES2026988T3 (es) 1992-05-16

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