DE507628C

DE507628C - Process for the production of hollow rings from ring-shaped sheet metal disks

Info

Publication number: DE507628C
Application number: DEK101442D
Authority: DE
Original assignee: KLEINEISENWERK VOSSLOH GmbH
Current assignee: KLEINEISENWERK VOSSLOH GmbH
Priority date: 1926-11-09
Filing date: 1926-11-09
Publication date: 1930-09-18

Description

Hohlringe werden aus ringförmigen Blechscheiben in der Regel durch stufenweises Ziehen hergestellt, wobei das Material infolge der an den Randteilen eintretenden Überbeanspruchung zwischen den einzelnen Ziehvorgängen einer Glühbehandlung unterworfen und etwa überschüssiges Material durch Abschneiden entfernt wird.Hollow rings are made from ring-shaped sheet metal disks, usually by means of a step-by-step process Pulling produced, the material as a result of the overstressing occurring at the edge parts Subjected to an annealing treatment between the individual drawing processes and any excess material by cutting off Will get removed.

Die Erfindung betrifft ein Verfahren zur Herstellung von Hohlringen aus ringförmigen Blechscheiben ohne Anwendung von Ausglüharbeiten. Bisher war ein solches das Ausglühen vermeidende Verfahren nur dadurch möglich, daß durch Benutzung besonderer Zieh- und Biegevorrichtungen die Blechscheiben während des Ziehens und Biegens zu einer U-förmigen Rinne derart festgehalten wurden, daß ein Werfen oder Krümmen der Randteile unmöglich war, worauf diese festgeklemmten Ränder abgeschnitten werden mußten.The invention relates to a method for producing hollow rings from ring-shaped Sheet metal disks without the use of annealing work. So far, one of these has been annealing Avoiding processes are only possible by using special pulling and bending devices to remove the sheet metal disks so held in place while being drawn and bent into a U-shaped channel became that a throwing or bending of the edge parts was impossible, whereupon these clamped Edges had to be cut off.

Das vorliegende Verfahren stellt eine weitere Ausbildung des bisher üblichen Ziehverfahrens dar, und zwar in der Richtung, daß eine Glühbehandlung gänzlich unterbleiben kann. Das neue Verfahren ist im wesentlichen dadurch gekennzeichnet, daß die als Ausgangsmaterial dienenden ringförmigen Blechscheiben von vornherein überschüssiges Material aufweisen und der die Tiefe der Halbrundung bewirkende Ziehvorgang in mehrere, zumindest drei Stufen unterteilt ist, und zwarThe present process represents a further development of the previously customary drawing process represents, in the direction that an annealing treatment can be omitted entirely. The new procedure is essential characterized in that the ring-shaped sheet metal disks serving as the starting material have excess material from the outset and the depth of the semicircle effecting drawing process is divided into several, at least three stages, namely

so, daß nach dem ersten Zuge das überschüssige, ringzonenförmige, Zerstörungen aufweisende Material des Innenrandes, nach dem zweiten, tieferen Zuge das in gleicher Weise zerstörte überschüssige Material des Außenrandes abgeschnitten und erst beim dritten Zuge-die volle Tiefe der Halbrundung erreicht wird.so that after the first move the excess, ring-shaped, destruction showing material of the inner edge, after the second, deeper train that in the same Wise destroyed excess material of the outer edge is cut off and only when third move-the full depth of the semicircle is reached.

Gerade durch die in zweckbewußter Weise von vornherein vorgesehene Anordnung überschüssigen Materials und die nach den einzelnen aufeinanderfolgenden Ziehvorgängen stattfindende Beseitigung des überschüssigen Materials des einen und darauf des anderen Randes wird der Fortfall der bekanntlich umständlichen und kostspieligen Glühbehandlung erzielt und dadurch das ganze Verfahren wesentlich vereinfacht und außerordentlich wirtschaftlich gestaltet. Ferner wird durch das neue Verfahren ermöglicht, die abwechselnd aufeinanderfolgenden Zieh- und Schneidvorgänge mittels einer mit Schneidwerkzeugen ausgestatteten Stufenpresse in Fließarbeit durchzuführen, so daß die fertigen Hohlringe in kürzester Zeit aus den Ringscheiben gewonnen werden, während hierzu früher im Hinblick auf die erforderliche Glühung und Beizung Stunden oder Tage gebraucht wurden.Excess due to the purposeful arrangement provided from the outset Material and the removal of the excess after each successive drawing process Material from one edge and then from the other edge becomes the omission of what is known to be cumbersome and costly annealing treatment achieved and thereby the whole process considerably simplified and extraordinary economically designed. Furthermore, the new method enables the alternating successive drawing and cutting operations by means of a cutting tool equipped transfer press to carry out in flow work, so that the finished hollow rings in the shortest possible time from the ring disks can be obtained, while this used to take hours or days with regard to the required annealing and pickling became.

In der Zeichnung wird das neue Herstellungsverfahren durch Darstellung der Gestaltungen veranschaulicht, welche die Ring-The drawing shows the new manufacturing process by showing the designs illustrates which the ring

Claims

disc assumes in the manufacture of the hollow ring according to the new process.

Fig. 1 to 7 each show the hollow ring in plan and sectioned in side view its different stages of development.

Fig. Ι shows the ring disc punched from a sheet metal strip, which is dimensioned so that their edges have excess material compared to the finished hollow rings.

A flat annular groove α is first drawn from this annular disk by means of a tool of the known type. In particular, the edge zone b of the inner perforation of the annular disk is overstressed as a result of the widening of the holes caused by the pulling. This edge zone, indicated by a dotted line in Fig. 2, is therefore cut off in the next step, so that the shape shown in Fig. 3 is created. This is followed by the second train, through which the annular groove α is deepened. After this, further excess material c from the overstrained inner and possibly also outer edge zone is cut off so that the annular groove assumes the shape shown in Fig. 5. With the third pull, the channel is drawn even deeper, so that in Fig. 6 it finally has the shape that was previously achieved in a single drawing process, but a subsequent annealing was absolutely necessary. The deep annular groove shown in Fig. 6 is then closed in a known manner by pressing the edges together to form the finished hollow ring shown in Fig. 7.

It is of course not absolutely necessary for the new manufacturing process that the drawing process is divided into three stages and between these three stages a two-time cutting of the Margins takes place. The subdivision into individual drawing stages and the number of to operating sections is depending on the requirements of the metal used, the Wall thickness etc. to be set up. Accordingly, it must also be determined in each case be how much excess material in the washer serving as a starting piece in the With regard to the edge sections to be effected is required.

Process for the production of hollow rings by stepwise drawing and Cutting of ring-shaped sheet metal disks with excess edge material and without intermediate annealing, characterized in that that the drawing process causing the depth of the semicircle is divided into several, at least three stages is, in such a way that after the first move the excess ringzoneufonnige, Damage-showing material of the inner edge, after the second, deeper 6g Train cut off the excess material of the outer rudge, which was destroyed in the same way and only reached the full depth of the semicircle on the third move will.

1 sheet of drawings