EP0390828B1 - Vorrichtung zum umformen eines rotationssymmetrischen blechkörpers, beispielsweise eines riemenscheibenrohlings - Google Patents

Vorrichtung zum umformen eines rotationssymmetrischen blechkörpers, beispielsweise eines riemenscheibenrohlings Download PDF

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Publication number
EP0390828B1
EP0390828B1 EP89900228A EP89900228A EP0390828B1 EP 0390828 B1 EP0390828 B1 EP 0390828B1 EP 89900228 A EP89900228 A EP 89900228A EP 89900228 A EP89900228 A EP 89900228A EP 0390828 B1 EP0390828 B1 EP 0390828B1
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
EP89900228A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0390828A1 (de
Inventor
K. Gerd 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.)
FORMATECHNIK METALL- UND KUNSTSTOFFTEILE GMBH & CO
Original Assignee
Formatechnik Metall- und Kunststoffteile & Co Betriebs-Kg 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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Application filed by Formatechnik Metall- und Kunststoffteile & Co Betriebs-Kg GmbH filed Critical Formatechnik Metall- und Kunststoffteile & Co Betriebs-Kg GmbH
Priority to AT89900228T priority Critical patent/ATE68381T1/de
Publication of EP0390828A1 publication Critical patent/EP0390828A1/de
Application granted granted Critical
Publication of EP0390828B1 publication Critical patent/EP0390828B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • the invention relates to a device for reshaping a rotationally symmetrical sheet metal body. Attention is drawn to EP-A-0319979, which relates to the same invention as described here, but relates to other contracting states.
  • a device according to the aforementioned type is 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 belt 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 during the side pressure application by the tool could not be ruled out.
  • a rotatable counter bearing had to be provided for the cavity of the sheet metal body will.
  • 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 is held in the starting position by the spring, and that one against the Spring force acting brake acting on the inner eccentric is present. 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.
  • Fig. 1 shows schematically a cross section through a detail of the device in the starting position.
  • Fig. 2 shows schematically a cross section through the detail of FIG. 1 in a working position.
  • Fig. 3 shows schematically a side view of the detail in the working position.
  • Fig. 4 shows schematically a view of the device in the starting position
  • FIG. 5 schematically shows a view of the device according to FIG. 4 in the working position.
  • 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 alongside 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 inner cylinder 7 rolls on the sheet-metal body 1 with an expression of one 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 slide 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 initial 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 a clear representation, it is not shown in the figures. If a torque is exerted in the clockwise direction on the inner eccentric 11 of a rotation of the disk 14 counterclockwise, then this executes a rotation about its axis of rotation 15 according to arrow 16, whereby it is deflected against the spring force until further deflection by the further stop 21 is prevented.
  • the disk 14 is driven by a cylindrical worm 23, the toothing of which engages 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 by the worm 23 and set in rotation in the sheet metal body axis 2.
  • 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 lying outside, 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 larger the circular path traversed by the inner cylinder 7 becomes, the deeper the poly-V profile 8 is embossed into the tread 6. If the eccentric 11 reaches the further stop 21, a limit switch (not shown) is actuated, which releases the brake. As a result, the inner eccentric is returned to the starting position by the spring 18 and the sheet metal body 1 can be removed from the device.
  • 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)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Pulleys (AREA)
  • Braking Arrangements (AREA)
  • Press Drives And Press Lines (AREA)
EP89900228A 1987-12-08 1988-12-07 Vorrichtung zum umformen eines rotationssymmetrischen blechkörpers, beispielsweise eines riemenscheibenrohlings Expired - Lifetime EP0390828B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89900228T ATE68381T1 (de) 1987-12-08 1988-12-07 Vorrichtung zum umformen eines rotationssymmetrischen blechkoerpers, beispielsweise eines riemenscheibenrohlings.

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
EP0390828A1 EP0390828A1 (de) 1990-10-10
EP0390828B1 true EP0390828B1 (de) 1991-10-16

Family

ID=6342137

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89900228A Expired - Lifetime EP0390828B1 (de) 1987-12-08 1988-12-07 Vorrichtung zum umformen eines rotationssymmetrischen blechkörpers, beispielsweise eines riemenscheibenrohlings
EP88120547A Expired - Lifetime EP0319979B1 (de) 1987-12-08 1988-12-08 Vorrichtung zum Umformen eines rotationssymmetrischen Blechkörpers, beispielsweise eines Riemenscheibenrohlings

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88120547A Expired - Lifetime EP0319979B1 (de) 1987-12-08 1988-12-08 Vorrichtung zum Umformen eines rotationssymmetrischen Blechkörpers, beispielsweise eines Riemenscheibenrohlings

Country Status (6)

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

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 (enrdf_load_stackoverflow) * 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 234 (M-507) (2270), 14. August 1986 & JP-A-6167523 (YAZAKI), 7. April 1983 *

Also Published As

Publication number Publication date
DE3865680D1 (de) 1991-11-21
ES2026988T3 (es) 1992-05-16
DE3741596C2 (enrdf_load_stackoverflow) 1991-01-10
EP0390828A1 (de) 1990-10-10
EP0319979B1 (de) 1991-09-25
DE3741596C3 (de) 1995-05-18
JPH03502663A (ja) 1991-06-20
WO1989005203A1 (en) 1989-06-15
DE3741596A1 (de) 1989-06-08
ATE68381T1 (de) 1991-11-15
EP0319979A1 (de) 1989-06-14

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