JP2923021B2 - Strip winding device in hot continuous rolling mill - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a strip winding device for winding a strip into a coil in a hot continuous rolling mill.

[Conventional technology]

As disclosed in JP-A-56-45210, a conventional apparatus for winding a strip from a hot finishing mill into a coil shape (hereinafter referred to as a down coiler) includes a rolling pitch and a winding pitch. Multiple units are installed from the balance. Therefore, a pair of pinch rollers are installed on the coiler inlet side so that the strips can be alternately guided to a plurality of down coiler mandrels, and the upper pinch rollers are moved up and down to guide the strip end to a predetermined mandrel. I have.

[Problems to be solved by the invention]

The prior art described above has a drawback that when the strip is switched from the currently wound mandrel to another mandrel, the back pinch roller is raised to reduce the backlash to zero and the winding of several turns of the outer layer of the coil becomes poor. Further, in a hot continuous mill in which the strip is continuously supplied by a finishing mill, the present method requires a very short time without sufficient time between the preceding coil and the next winding coil as in the conventional hot rolling equipment. Path switching must be performed. Therefore, the following problems arise when the conventional methods are used.

1) Opening the pinch roller as in the prior art reduces the back tension to zero and deteriorates the winding appearance of several outer layers, but is further enhanced by increasing the speed.

2) It is difficult to switch the high speed bus at the time of split winding of the strip, and it lacks reliability.

The present invention provides a hot continuous rolling equipment to which strips are continuously supplied, when switching a strip winding mandrel by strip splitting, prevents the winding of several turns of the outer layer of the preceding coil, and winds the split leading coil. The purpose is to switch the path in a short time without lowering the take-up speed and wind it up with another coiler.

[Means for solving the problem]

The strip winding device in the hot continuous rolling mill according to the present invention includes a plurality of coilers that cut a strip continuously supplied from a finishing mill by a running cutter and wind the strip with a plurality of mandrels. In the strip winding device in the hot continuous rolling mill, a pair of upper and lower first pinch rollers is provided on each of the entrance sides of the plurality of coilers, and a pair of upper and lower first pinch rollers is provided between the first pinch roller and the coiler. A second pinch roller is provided, and an upper pinch roller of the first pinch roller is vertically movable, an upper pinch roller of the second pinch roller is vertically movable, and The lower pinch roller of the second pinch roller is movable vertically, and the upper pinch roller of the second pinch roller is moved to the lower pinch roller of the second pinch roller. Characterized by offset disposed in the coiler side against.

[Action]

That is, two pairs of pinch rollers that can move in the vertical direction are arranged on the respective coiler entry sides. And, of the two pairs of pinch rollers, the input pinch roller is configured so that the upper pinch roller can move in the vertical direction, and the output pinch roller offsets the upper roller to the output side with respect to the lower roller, and It is configured to be vertically movable,
Since the lower pinch roller is configured to be able to move in the vertical direction, it is possible to prevent the coil from being displaced by opening the pinch roller when the strip winding mandrel is switched, and to perform high-speed path switching.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 (a) to 2 (b). As shown in FIG. 1, when strips from a finishing mill are wound by a plurality of coilers alternately through a pinch roller in a hot continuous rolling mill, as shown in FIG. Two pairs of pinch rollers are arranged on the input side of each of the plurality of coilers, and the pinch roller on the input side can move the upper pinch roller vertically in each pair of pinch rollers, and the pinch roller on the output side. Has a structure in which the upper roller is offset from the lower roller on the exit side and is movable vertically, and the lower pinch roller is movable vertically.

Next, the operation of the two pairs of pinch rollers on each coiler entry side will be described with reference to FIGS. 2 (a) to 2 (h). Second
FIG. 5A shows a state in which the strip is wound up by the coiler 5 on the entry side. Two pairs of pinch rollers 1, 2 on the coiler entrance side
Descends and pinches the strip, adding back up.

FIG. 2 (b) shows that the inlet side coiler 5 moves to the outlet side coiler 6;
This shows a preparation stage in which winding is changed. Pinch roller 2
In order to change the path so that the leading end of the following coil cut by the inlet shear (not shown) is guided to the coiler 6, the upper and lower rollers are raised up to a position where the upper surface of the lower roll is higher than the passing plate guide 8, and The upper roller 2-a is raised until a gap is formed between the upper roller 2-a and the lower roller 2-b. The winding on the entrance side coiler 5 is applied with a back tension by the pinch roller 1.

In FIG. 2 (c), the strip is cut by an input shear (not shown), the trailing end of the strip passes to the input coiler 5, and the end of the subsequent strip after cutting passes through the pinch roller 1 and rises. The state where it is guided to the exit side coiler 6 by the pinch roller 2-b is shown. Since the strip which has been cut and wound up on the inlet side coiler 5 passes through the pinch roller 1 after the shear cutting, the stripping is less likely to occur because the back tension is added.

The pinch rollers 3, 4 are arranged to guide the leading end of the following strip to the coiler 6. That is, the pinch roller 3 is arranged close to the pinch roller 4 and reliably guides the strip end to the pinch roll 4. The pinch roll 4 has its upper roll offset from the lower roll on the output side, and the tip of the strip is bent downward and guided to the mandrel of the down coiler 6.

FIG. 2 (d) shows a state in which the strip is wound around the mandrel by a plurality of wrapper rollers installed around the mandrel (not shown), passing through the pinch rollers 1, 2, 3, and 4.

FIG. 2 (e) shows a state in which the strip is wound up by the exit side coiler 6. The entrance pinch roller 3 of the exit side coiler 6 descends to pinch the strip, and adds back up. The pinch roller 1 maintains the pass line, and the upper roller 2-a moves up and the lower pinch roller 2-b moves down with respect to the pinch roll 2, and a gap is provided between both rollers to pass the plate.

FIG. 2 (f) shows that the outgoing coiler 6 and the incoming coiler 5
4 shows a preparation stage for switching winding. The pinch roller is moved up and down to a position where the lower surface of the upper roll is lower than the passing plate guide 8 for path switching so that the leading end of the following coil cut by a shear not shown in FIG. Lower both rollers.

In FIG. 2 (g), the strip is cut by an input shear (not shown), the rear end of the strip enters the output coiler 6, and the tip of the subsequent strip after cutting passes through the pinch roller 1 and enters the pinch roller 2. The state where it is guided to the side coiler 5 is shown. The strip which is cut and wound up on the exit side coiler 6 is forcibly pulled by the mandrel and wound up toward the coiler 6 even if the pinch roller 2 descends and pinches the strip. Since the strip wound around the coiler 6 is applied with a back tension until it passes through the pinch roller 4 after the shear cutting, the strip is hardly displaced.

FIG. 2 (h) shows a state in which the strip is wound around a plurality of wrapper rollers installed around the mandrel (not shown) through the pinch rollers 1 and 2.

As described above, the strip can be wound continuously in the order of FIG. 2 (a) to FIG. 2 (h) without reducing the speed while maintaining the high speed, and with minimum coil displacement.

〔The invention's effect〕

It is possible to wind the strip while applying the back tension, to prevent the coil from slipping out of the outer layer, and to switch to a plurality of coilers in a short time.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 2 (a) to FIG. 2 (h) show an embodiment of the present invention. FIG. 2 is an operation diagram of a strip winding device and a pinch roller on an entrance side thereof. FIGS. 2 (a) to 2 (d) are operation diagrams of winding a strip by a first coiler, and FIG. 2 (e). )
2 to 2 (h) are operation diagrams for winding the strip by the second coiler. 1-a: No. 1 entry side upper pinch roller, 1-b: No. 1
Inlet lower pinch roller, 2-a ... No.1 Outer upper pinch roller, 2-b ... No.1 Outer lower pinch roller, 3-a
…… No.2 input side upper pinch roller, 3-b …… No.2 input side lower pinch roller, 4-a …… No.2 output side upper pinch roller, 4-b …… No.2 output side lower Pinch roller, 5 …… No.1
Coiler, 6 ... No.2 coiler, 7 ... Coil, 8 ...
Passing plate guide.

Claims (1)

(57) [Claims] 1. A strip winding apparatus in a hot continuous rolling mill provided with a plurality of coilers for cutting a strip continuously supplied from a finishing mill by a running cutter and winding the strip with a plurality of mandrels. A pair of upper and lower first pinch rollers are respectively provided on the entrance side of each of the plurality of coilers, and a pair of upper and lower second pinch rollers are respectively provided between the first pinch roller and the coiler, and Moving the upper pinch roller of the first pinch roller up and down, moving the upper pinch roller of the second pinch roller up and down, and moving the lower pinch roller of the second pinch roller up and down. And the upper pinch roller of the second pinch roller is offset from the lower pinch roller of the second pinch roller on the coiler side. Strip winding device in continuous hot rolling 設機 characterized by.