Winding – tensioning – or guiding – Loop forming – By orbital guide
Patent
1994-11-30
1996-04-16
Jillions, John M.
Winding, tensioning, or guiding
Loop forming
By orbital guide
B21C 4714, B21C 4900
Patent
active
055074456
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for depositing wire windings in a drum pack. The term "wire" is not only to be understood as a bare metal wire but also as a wire which has already been processed, for example, a wire having a varnish or an insolating layer or the like, as well as, a wire strand which may or may not have a covering, and the like.
A drum pack winder of the known type mentioned above comprises a depositing device which normally feeds the wire to the winder at a high velocity and the wire is wound in windings around a stationary cylindrical winding core having a vertical axis. The winding device is formed in such a way that as soon as a predetermined number of wire windings is wound on the winding core, the lowermost wire winding falls in the drum pack. Due to the high wire feeding velocities this process takes place relatively quickly so that five windings or more per second fall in the drum pack.
The drum pack itself is likewise cylindrically formed whereby the (fictitious) cylindrical axis coincides with the (fictitious) cylindrical axis of the winding core. In the drum pack, there is normally a likewise cylindrical drum pack core which prevents the individual windings becoming tangled.
Drum pack winding devices have the advantage that in a short time a large amount of wire can be wound which, on the other hand, can be very quickly pulled out from the drum pack in the case that a further processing is necessary.
A particular problem with the drum pack winder is the changing of the drum pack. Due to the high velocities, the feeding of the wire from, for example, a rolling carriageway, a drawing facility or the like, cannot be interrupted when the drum pack is exchanged. As is disclosed in DE-AS 20 38 133, it is therefore normal in the prior art to provide a number of slidable or swingable storage fingers arranged around the winding core which are to be moved on the winding core as soon as the drum pack located in the device is full. As a result, the wire windings are therefore prevented from falling in the drum pack and collect together on the winding core. As soon as the new drum pack is positioned in the winding device, the storage fingers are pulled back and the collected windings fall in the empty drum pack. This phase of the exchanging process is particularly critical since it often occurs that the collected windings get jammed or tilted when falling down and then are partly kept hanging at the guide cylinder or at the drum pack core or become tangled in some other way. In this case, the wire windings which follow can no longer reach into the drum pack and due to the large wire feeding velocity, large amounts of wire collect quickly outside the winding device. Therefore, DE-AS 20 38 133 suggests to develope the storage fingers in the form of an arc according to a type of iris aperture.
DE-OS 27 08 857, shows likewise a corresponding drum pack winding device having four sector-like storage fingers for catching the wire windings during a drum pack exchange and which are transferable from an outer position which does not interfere with the falling of the windings, to an inner position in which the windings are held. A wire cutting device is provided between the holding device and the drum pack in order to cut the wire during a drum pack exchange.
DE-PS 22 13 172, shows a further drum pack changing device. In this case, in order to prevent a jamming or tilting of the windings held during the changing of the drum pack, a cylindrical extension piece is used which is attached onto the drum pack core.
With the above described drum pack changing devices, the wire is cut during the changing of the drum pack. However, with numerous applications it is necessary that the wire is transferred from a filled drum pack into the next empty drum pack without any interruption. This is, above all, the case when a changing of the drum pack takes place within a closed production process and the wire wound in the drum packs afterwards undergoes a further processing.
When the full drum pack is then push
REFERENCES:
patent: 2957640 (1960-10-01), Lewis, Jr.
patent: 3054570 (1962-09-01), Nye
patent: 3088690 (1963-05-01), Haugwitz
patent: 3776076 (1973-12-01), Hauck
Jillions John M.
Maschinenfabrik Niehoff GmbH & Co. KG
Rauchfuss, Jr. George W.
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