Winding – tensioning – or guiding – Convolute winding of material – With spool loading or coil removal
Reexamination Certificate
2000-07-07
2001-08-14
Rivera, William A. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
With spool loading or coil removal
C242S559200
Reexamination Certificate
active
06273357
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a device for the winding of striplike material, in particular steel strip, in each case on one of two spreadable winding mandrels which are arranged, overhung, horizontally and parallel to one another and which, driven in rotation independently of one another, are mounted, in a carrying structure rotatable about a common horizontal central axis, on a vertical carrying wall in the form of a circular disk, the circumferential region of which forms an annular running rail which coaxially surrounds the central axis of the carrying structure and which supports the carrying wall rollably on running wheels, the rotary drives for the winding mandrels, together with the carrying structure, being fastened rotatably to the latter.
Winding devices of the above described type are also known as reversible winders or rotary coilers and are used in continuous-strip plants in the hot and cold sectors. They are capable of carrying out a coil change at extremely short time intervals and of thereby replacing two conventional separate winders. The winding devices equipped with two winding mandrels make it possible, as early as toward the end of the winding operation which is not yet concluded, to pivot the winding mandrel, together with the coil, into the removal position as a result of the rotation of the carrying structure about its central axis, while the other winding mandrel simultaneously pivots into the standby position for the beginning of the next winding operation. After the strip has been severed by means of high-speed parting shears, the start of the subsequent strip can be gripped and wound without delay on the standing-by winding mandrel.
DE 19543046.A1 generally describes a rotary winder wherein, the spreadable winding mandrels, themselves capable of being driven in rotation independently of one another, are mounted in a drumlike carrying structure capable of being driven in rotation about a common horizontal central axis, the rotary drives for the winding mandrels being rotated together with the carrying structure. As a result, the winding mandrels can be driven directly, that is to say without a variable-ratio gear being interposed; cost-intensive gears with a multiplicity of spur wheel transmission stages are dispensed with.
The drumlike carrying structure has two vertical and mutually parallel carrying walls in the form of a circular disk, which are spaced from one another, and longitudinal members which connect these and on which the winding mandrels, which pass through one carrying wall, and spreading drives are mounted. The rotary drives are flanged to the outside of the other carrying wall and are connected to the winding mandrel through the carrying wall via cardan shafts. The carrying structure thus receives in it the winding mandrels and, in particular, their spreading drives and, at the same time, also carries the rotary drives flanged to one carrying wall, so that these, together with the carrying wall of the carrying structure, can be rotated about the central axis. The connection between the rotary drives and the winding mandrels is made via cardan shafts which make it possible to distribute the winding mandrels, offset, on the circumference of the carrying wall.
Even though the known winder was a marked improvement, as compared with the prior art, the arrangement of the spur wheel gears, the mounting of the drumlike carrying structure with two carrying walls and the connection between gear and electric motor are nevertheless too complicated and required too much space. Due to the great weight of the carrying structure, this winding device was also too costly, measured against conventional winders.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a rotary winder with multiple winding mandrels for the winding of striplike material which does not require the use of the complicated and heavy framework for the drumlike carrying structure, while, due to a marked saving of weight, is a more cost-effective solution without impairing the functioning capacity.
The invention achieves its object in that the carrying wall in the form of a circular disk is arranged coaxially at the end of a central carrying shaft mounted, at its end opposite the carrying wall, in a rotary bearing. In the invention the gears for the winding mandrels are arranged, on the side of the carrying wall facing away from the winding mandrels, in self-supporting cases with cover division, which are connected to the carrying wall and with the latter form the carrying structure and which are themselves connected supportingly to at least one carrier which is fastened, overhung, to the carrying wall, so as to be parallel to the carrying shaft, and which, between the gear case and the rotary bearing, carries the drive motors for the winding mandrels, the drive motors being arranged on brackets.
Instead of the spur wheel gears being screwed into the drumlike carrying structure, the gears for driving the winding mandrel are arranged in self-supporting cases which, together with the carrying wall, form the carrying structure. Instead of two carrying walls in the form of a circular disk being provided, as hitherto, according to the invention only one carrying wall is used, which is fastened to the end of a central carrying shaft mounted at the other end in a rotary bearing. The drive motors for the winding mandrels are fastened to at least one carrier which is fastened, parallel to the carrying shaft, to the rear side of the carrying wall and to the case for the gear.
According to the invention, a semiopen mounting with preferably three running rollers is used for the carrying wall in the form of a circular disk, at least one running wheel being arranged below the carrying wall in the form of a circular disk, and at least one running wheel arranged on each of the two sides of the carrying wall being provided for the lateral forces acting transversely to the carrying wall. The weight of the entire device therefore rests on the running roller arranged below the carrying wall and on the rotary bearing provided at the other end of the carrying shaft. The lateral running rollers absorb the strip traction forces and serve for the lateral guidance of the carrying wall.
According to a particular feature of the invention, there is provision for the carrier for the drive motors to be designed as a tube, preferably, according to another feature of the invention, a respective tube being assigned to each case and drive motor. The tubes screwed to the gear case side walls leave room, in the middle, for the carrying shaft, which, according to a further feature of the invention, is received in the rotary bearing designed as a self-aligning roller bearing.
When two tubes are used as a carrier for the drive motors, these can be oriented by means of their brackets in such a way that, according to a further feature of the invention, the input shafts of the gears are in alignment with the output shafts of the motors and are connected to one another via short cardan shafts. These short cardan shafts are not only less costly than long cardan shafts, due to the fact that the input and output shafts are in alignment with one another, but the transmitted torques need not be deflected, so that more favorable drive conditions also prevail.
In a further embodiment of the invention, there is provision for the winding mandrels to be designed as exchangeable plug-in mandrels which are held in the gear output shafts designed as a hollow shaft. The winding mandrels, may, as required, be quickly drawn off axially and changed. The gear does not need to be opened for this purpose, and the necessary exchange work can therefore be carried out in a very short time and without any high outlay.
Finally, according to a further feature of the invention, it is proposed that slow rotary transmitters for hydraulic oil, grease and water as supply media and for the control power be provided at that end of the carrying shaft which is located on the rotary-bearing side.
The invention has p
Figge Dieter
Wessel Karl-Heinz
Cohen & Pontani, Lieberman & Pavane
Rivera William A.
SMS Demag AG
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