DE2606301C2 - Device for feeding and discharging metal strip - Google Patents

Description

25th

The invention relates to a device for feeding and discharging metal strip into and out of a Processing system of the type specified in the preamble of patent claim 1.

To control the productivity of cold rolling mills or electroplating systems, the aim is to have the greatest possible strip lengths continuously in one Edit pass. For this purpose z. B. in modern cold rolling mills. Several strips of Bonds of normal size scooped up and through at the beginning and end of each strip before pickling Butt welding joined together. Behind the welding machine is a roller table with a loop lifter and loop carriage provided, wherein the loop carriage represents a tape storage device to also during of the required standstill for the welding processes and the coil changes can. However, intermediate storage devices of this type, which consist of a sling lifter and a sling carriage, are required long loop pits of at least 100 m in length. Furthermore, the strip to be rolled tends to twist the loops, which can only be avoided by straightening processes that are extremely difficult to control. About those caused by dividing the endless tape into normal lengths after the reworking process To avoid interruptions, an intermediate storage facility is also often installed on the outlet side of the rolling train Form of sling lifters and sling trolleys provided, which increases the manufacturing costs and the Management of such a continuous system accordingly raise.

From AT-PS 2 59 345 a device for the continuous supply of steel strip to a μ is continuously operating pipe welding plant known, which the strip material from coils of normal size removes, whereby the individual bands are welded together to form an uninterrupted band before processing will. This known device has a single buffer store for the tape . Storage reel of enlarged drum diameter on which the previously butt-welded be wound up on narrow ribbons and unwound again at the same time. Pulling off the The tape is carried out continuously over the inside of this storage reel and an inclined run-off roller. It is obvious that this solution only when using very narrow and in itself comparatively flexible, so twistable tape material can be knocked in. For cold rolled material or Galvamsier ribbons, which usually have a width of up to several meters, the strip is led out at an angle in the direction of the reel axis of rotation naturally not possible.

The object of the invention is to provide a device for feeding and discharging metal strip into and out of a To create machining equipment of the specified type, which also allows machining of wide metal strips of relatively great length in continuous operation with little space requirement and simpler Operational management enables.

According to the invention, this object is achieved by the characterizing features of claim 1 solved by using two storage reels per buffer and by the movable arrangement of the two storage reels results in the possibility that a large number of Single strips of normal length butt welded together and then on one storage reel can be wound up and that at the same time with this winding process a previously on the broad Storage drum wound tape of a correspondingly large length continuously and with optimal Speed can be passed through the processing system. Because of the continuous Continuous operation increases the performance of the processing system and reduces the number of rejects at the respective entry and exit ends of the individual belts as well as the number of threading processes opposite a conventional system that processes strips of normal length separately. Since no sling lifters are used, not only does the space requirement decrease, but it also simplifies the Control and operational management of the plant. Furthermore, the measuring points can be used to record the parameters of the processed strip are arranged in the vicinity of the outlet-side take-up reel, so that errors can be recorded at an early stage.

Expedient further developments of the invention are the subject matter of subclaims.

In the following, exemplary embodiments of the invention are described in detail with reference to the drawing. It shows

1 shows a schematic side view of the feed and discharge device in connection with a cold rolling mill:

2 shows a side view of the inlet side of the Device according to Fig. I;

FIG. 3 is a plan view of the device according to FIG. 2;

4 shows an enlarged side view of an intermediate store;

Fig.5 shows a storage reel in cross section at Inserting a tape end;

F i g. 6 the outlet side of the device according to FIG. 1 in a schematic side view;

F i g. 7 the outlet side of the device according to FIG. I in plan view;

F g. 8 is an enlarged side view of the upstream side Cache.

The rolling plant shown in Fig. 1 has an unwinding stand with a payout cap 1, a pair of scissors 4, a welding station 5 and two storage reels 7, 8 on the inlet side of a rolling train 12 and two further storage reels 14, 15 , a cropping shear 19 and a winding reel 21 the stand discharge side. The tape withdrawn from a coil 2 in the pay-off reel 1 is straightened in a roll straightening machine 3 and wound onto the storage reel 7. Then the front end of the strip of the next bundle is scooped up in the same way and both ends of the strip are welded to one another in the welding station 5, whereupon the winding of the metal strip onto the storage reel 7 is continued. In this way, about ten raw strips are connected to one another and rolled up to form an intermediate collar 10 is in the rolling line and the strip can be rolled out.

A straightening roller set 11 is provided on the entry side of the first roll stand of the rolling train 12. As soon as the strip has been gripped by the outlet-side storage reel 14, the rolling process begins under tension, with an intermediate collar 16 of a correspondingly large diameter being wound onto the outlet-side storage reel 14 without interrupting or slowing down the rolling process. At the same time, the previously rolled strip is drawn off an intermediate collar 17, divided into strips of normal length by means of cropping shears 19 and wound onto the take-up reel 21 to form collars 22 with normal diameter, which are removed in a carriage 23. The tape can also be continuously wound up into coils with a large diameter on the outlet side without the WHz operation having to be interrupted or accelerated as a result.

As shown in FIG. 2, the tape runs under a pressure roller 101 from the collar 2 of the pay-off reel 1 via the roller straightening machine 3 to the scissors 4, which scoop the front end. The trimmed end of the tape is inserted by Klemm.Ollen 6 and a threading guide 103 pivotable about an axis 102 into a slot 104 in the storage reel 7, whereupon winding begins in the direction of rotation indicated by the arrow at an initial speed of approx. 40 m / min. If the tape can be put under tension after several revolutions, the winding speed is increased. Instead of the slot groove 104 , grippers can also be provided for holding the leading end of the tape, or the winding can be carried out by means of a belt loop.

As soon as the rear end of the band 2 runs into the scissors 4, the rear end of the band is cut when the band movement is interrupted. Subse- ^ ₀ Bend is inserted, the front end of the following tape Rohbundes in the cutter 4, and cut, whereupon the two strip ends are welded together in the welding station 5, and connected to each other in this way strips are wound to the intermediate collar 9

The strip of the intermediate collar 10 is rolled while the intermediate bucket J 9 is being formed. When the intermediate collar 10 is largely unwound and its diameter has decreased accordingly, the intermediate collar, which has already been completely wound, can be used

9 together with the intermediate reel 7 and a bearing 109 on a position guide 110 in the direction of the arrow / in FIG. 3 can be moved axially into the rolling line. As soon as then the rolling of the intermediate collar

10 is finished, the strip can be unwound and rolled from the next intermediate collar 9, which is axially moved in the rolling line. The empty storage reel 8 is used to form the next intermediate bundle in the direction of arrow g in FIG. 3 move axially, whereupon a new winding process begins. The front end of the tape is inserted with the aid of an insertion unit 111, which can be assigned to the threading guide 103 and advanced relative to it.

After the intermediate collar 9 has moved axially into the rolling line, after a pressure roller has been actuated, the strip is moved from a guide plate 112 attached to the bearing 109 and a stationary guide 108 via the pinch rollers 11 into the rolling train «? introduced For smaller intermediate bundles with e.g. B. only six normal tape lengths, the guide plate 112 can be extended. For even unwinding of the tape from the intermediate coils, the rear tape end can also be bent in the opposite direction by a bending roller which is arranged vertically on the clamping roller 6 in the welding line. The storage reels 7 and 8 are driven by electric motors 115 via telescopic shaft couplings 113 and reduction gears 114.

In the following, the winding on the outlet side is explained with reference to FIGS. 6 to 8 explained. The fully wound intermediate collar 17, together with its storage reel 15, is moved axially from the rolling line 221 into a dividing and winding line 222. The rolled strip is introduced into a stationary guide 208 by a pressure roller 207, passes through pinch rollers 18 and, via a deflection roller 20 , arrives at the take-up tube 21, onto which it is wound by means of a belt loop 24. As soon as the diameter has reached approximately the size of a normal collar 22 , the band is cut by the cropping shears 19 and the finished collar 22 is conveyed away by the carriage 23. Thereafter, the remaining part of the intermediate collar 17 is wound onto another take-up reel.

At the same time, the rolled strip is wound onto the storage reel 14 on the outlet side, which has moved axially into the rolling line 221, to form the intermediate coil 16. As soon as the band is fully unwound from the intermediate collar 17, the intermediate collar 16, together with its storage reel 14 and a bearing 209, is moved on a bearing guide 210 into the dividing and winding line 222 in the direction of arrow ο . Before it is unwound from the intermediate collar 16, the empty storage reel 15 is axially displaced in the rolling line 221 in the direction of arrow ρ , whereupon winding into the state according to FIG. 8 begins. In this case, the tape end is threaded into the storage reel 15 by means of a telescopic guide, which is arranged in a threading guide 203 which oscillates about an axis 202.

According to FIG. 8, the front end of the strip running from the intermediate collar 17 is acted upon by a pressure roller 206 and guided by a guide plate 212 attached to the bearing 209 and the stationary guide 208 . For better tape guidance in the case of small collar diameters, the guide plate 212 is designed to be extendable. The storage tank on the outlet side

Reels 14 and 15 are driven by electric motors 215 via telescopic shaft couplings 21.3 and reduction gears 214 .

In the embodiment described above, both on the inlet side and on the On the outlet side of the rolling mill, intermediate coils of large diameter are formed. However, it is too possible, a loop guide on the inlet or outlet side of the rolling train and on each on the other side intermediate collars to be provided as intermediate storage.

In addition 6 sheets of drawings

Claims (3)

Patent claims: 1. Device for feeding and discharging metal strip into or out of a processing system, consisting of an unwinding stand for the metal strip in the form of bundles of normal size, a connecting station for connecting the ends of two strips and at least one Intermediate storage in which the metal band is wound up several bundles of normal size, thereby characterized in that the intermediate store has at least two storage reels (7, 8 or 14, 15) has, which optionally from a first winding position in an adjacent second winding position axially are movable. 2. Device according to claim 1, characterized in that in front of and behind the processing system (12) one intermediate store each with two axially displaceable storage reels (7, 8 and 14, 15) is arranged. 3. Device according to claim 2, characterized in that that the outlet-side intermediate store (14, 15) is followed by a pair of scissors (19).