JPS6056402A - Arrangement of cold rolling line - Google Patents

Abstract

PURPOSE:To obtain a well shaped coil under a reasonable design by installing a tension leveler provided with at least a leveling mill between the final stand and winding device of a cold or temper rolling installation. CONSTITUTION:Between the final stand 4 and winding device (tension reel) 6 of a group of tandem cold mill stands; a leveling mill 23 and a tension leveler 21 consisting of bridles 22, 24, which is provided to the inlet and outlet sides of the mill 23 at need, are arranged. A strip reeled out of a payoff reel 1 is cold rolled by a group 3 of stands through a pinch roll 2, and is provided with a strong tension by the bridles 22, 24. Then the strip is stretched in the longitudinal direction by the mill 23 to eliminate its partial elongation. In this way, the need for a line for leveling the strip is eliminated, and the shape of cold rolled strip is corrected immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to partial elongations such as ear wave and medium elongation of strips (band plates) of cold-rolled steel sheets, stainless steel sheets, non-ferrous metal plates, etc. A tension reel is installed at the rear of the cold rolling equipment or temper rolling equipment to correct shape defects,
Cold rolling line arrangement j+l that produces well-shaped coils
Regarding.

In general, shape defects during rolling occur due to various factors such as material, roll, and work factors, and various methods such as roll crown control, tension control, lubrication control, etc. have been added to improve them.

That is, as shown in FIG. 1, which shows the line arrangement of a typical tandem cold mill, in the past, the strip fed out from a slip-off reel 1 was passed through a tandem cold mill 2 tan group 3.
After passing through the strip, it is deflected by a deflector roll 5 and wound by a tension reel 6.The shape of the thus rolled strip has been greatly improved with the advent of new types of mills and variable crown rolls. However, the steepness reaches about 1 to 2%, but it does not reach the steepness of, for example, 0.3 to 0.5 inches, which meets this strict request. In order to do this, it is necessary to pass it through a tension repeller or a new temper rolling mill. For this purpose, various lines that process the rolled strip (e.g. annealing, surface treatment,
As shown in Figure 2, a tension repeller was installed in the cutting, dividing, etc. process line for the purpose of shape correction. That is, as shown in the figure, a strip fed out from a payoff reel 11 is passed through a pinch roll 12, and after having its both ends cut off by a side trimmer 13, it is passed through a tension reel 21, and then passed through an oiler 14. After passing through shear 15, it was converted to deflector rule 16 and tension reel 17
It is designed to be wound up. In addition, the tension repeller 21 is located at the entry side f of the leveling mill 23 in the sheet passing direction.
A ridele 22 and an exit side priddle 23 are arranged.

As described above, in the past, lines (called coil preparation lines, coil dividing lines, tension leveling lines, etc.) for the purpose of shape correction, edge removal, and division of coils were used independently of cold rolling equipment. ) T-, and a tension leveler was installed on this line. Separate front and rear equipment for coil unwinding and winding was required just to correct the shape of the cold-rolled strip. In addition, once the coil wound on the tension reel 6 of the cold rolling equipment is processed on a separate line, the time
Additional running costs such as electricity and manpower will also be required.

The present invention is aimed at reducing equipment costs and running costs by streamlining the line distribution in cold rolling, and its configuration is similar to that of the final stand of cold rolling equipment or temper rolling equipment. It is characterized in that a tension leveler equipped with a leveling mill and a prydle if necessary is installed between the winding device and the winding device.

Hereinafter, the cold rolling line arrangement of the present invention will be explained based on examples.

FIG. 3 shows a first embodiment of the present invention. In the embodiment shown in the figure, an entry side priddle 22. Leveling mill23. Exit side priddle 2
A tension leveler 21 consisting of four tension levelers is arranged.

That is, in front of the tandem cold mill stand group 3 in the sheet passing direction, there is a pay-on reel 1. A pinch roll 2 is arranged so that the strip fed out from the periodontal flail 1 is sent via the pinch roll 2 to a group of tandem cold mill stands 3, where it is cold rolled. An entry side bridging wheel 22 is arranged between the final stand 4 of the tandem cold mill stand group 3 and the leveling mill 230, and an exit side bridging mill 24 is arranged behind the leveling flannel 23 in the sheet passing direction. Entrance bride→
Le22. The exit side braid 24 is designed to apply high tension to the strip. A leveling mill 23 is arranged between the inlet side bride-to-rule 22° and the outlet side bride-to-rule 24. A typical example of leveling mill 23 is:
As shown in Fig. 5, the small diameter work 'a-/I/31a
an extension unit 31 arranged vertically, a width direction rectification unit 33 consisting of a small-diameter warp roll 33a and a large-diameter deflector roll 33b, and a medium-diameter work roll 3.
The straightening unit 34 consists of a longitudinal straightening unit 34 consisting of a deflector roll 34a and a deflector roll 34b. f
The material is stretched by 0.5 to 1.5 inches in the longitudinal direction to eliminate partial elongation of the material. A deflector crawler 59 and a winding device 6 are disposed behind the tension repeller 21 in the sheet passing direction, and the strip whose shape has been corrected by the tension repeller 21 is turned around by the deflector roll 5 and the winding device 41'; It is designed to be rolled up easily.

In the cold rolling line arrangement of the present invention having the above configuration,
Since the tension repeller 21 was placed in the cold rolling equipment,
S) There is no need for a line to correct the IJ bump.
These facilities for unwinding and winding can be omitted, resulting in an economical and rational design. In addition, it is possible to immediately modify the shape of a cold-rolled IJ tube.
Running costs such as time, electricity, and human power can also be reduced. In addition, as repellers for shape correction, there are usually stretcher repellers that elongate using only tension, roller repellers that reduce internal stress and subdivide by repeated bending, and tension levelers that elongate uniformly by using expansion force and repeated bending. There are three types, but stretcher repellers have uniform properties in the width direction and can be used with some materials such as aluminum, which have no elongation at yield point, but cannot be used with steel plates, and have the disadvantage of high tension. Therefore, roller levelers are unsuitable because they do not apply tension, so elongation at the neutral point cannot be obtained, and shape defects such as ear waves and medium waves caused by partial elongation of the material cannot be corrected.

In addition, in general, the tension repeller extension unit 3
If the elongation rate is given only by 1, the strip will inevitably warp in the width direction and the longitudinal direction. However, the tension repeller 21 of this embodiment uses the width direction warp correction unit 33 and the longitudinal direction warp correction unit 34 to prevent warpage. ``It has the advantage of minimizing waste. tension repeller 210
How to use: Extension unit work roll 31a.

The width direction straightening unit work roll 33b and the longitudinal direction straightening unit work roll 34a are respectively raised by a lifting device, and the tensioned strip is bent by 0.5 to 0.5 Permanent elongation is given so that the elongation rate is 1.5-.

Next, a 20th embodiment will be described with reference to FIG. 4. In this embodiment, a tension repeller consisting only of the leveling mill 23 is arranged between the final stand 4 and the tension reel 6 of the tandem cold mill group 3, and the final stand 4
The tension reel 60 and the tension reel 60 are used to correct the shape by using tension of usually 5 to 8 tons applied to the IJ. As described above, since no tension prydle is arranged in this example, the unit tension (unit: tension) of the strip is 1.5 to 5 Kg/fmm.
:' as low as 10 required tension with tension repeller
~40≠・m' (1/!5~415 in tension/yield ratio)
The elongation rate is low because of the low density (ε=0.1~
0.5%) has a defect, so there is a sufficient elongation rate (ε=0.5
1.5%), it is sufficient to install an entry side priddle 22 and an exit side priddle 24 before and after the leveling mill 23, as shown in FIG. 3, to apply high tension. Further, even if either one of the entry side pridles and the exit side pridles is provided, a sufficiently high tension can be obtained.

As explained above in detail based on the examples, in the present invention, the tension repeller is arranged in the cold rolling equipment or the conditioning rolling equipment, resulting in a rational design, and when the tension repeller is arranged in a separate line. In comparison, equipment costs and running costs can be reduced. Incidentally, all of the embodiments described above are applied to cold rolling equipment, but the traps can be similarly applied to rolling equipment.

[Brief explanation of drawings]

Fig. 1 is a line layout diagram of a typical tandem cold mill, Fig. 2 is a line layout diagram for the purpose of strip shape correction, edging), and division, and Figures 3 to 5 are line layout diagrams related to the present invention. , FIG. 3 is a line layout diagram of the first embodiment, and FIG. 4 is a line layout diagram of the second embodiment.
FIG. 5 is a detailed explanatory diagram of the leveling mill. In the drawings, 1 is a payoff reel, 2 is a vinyl roll, 3 is a tandem cold mill stand group, 4 is a final stand, 5 is a deflector roll, 6 is a tension reel 11 is a payoff reel, 12 is a pinch roll, 13 is a side trimmer, 14 is an oiler, 15 is a gamma wheel, 16 is a deflector roll, 17 is a tension reel, and 21 is a tension repeller. 22 is an entry side prydle, 23 is a leveling mill, 24 is an exit side plydle, 31 is an extension unit, 31a is a work roll, 32 is a deflector roll, 33 is a widthwise recoil correction unit, 33a is a work roll, 33b is a deflector roll , 34 is a longitudinal direction straightening unit, 34a is a work roll, and 34b is a deflector roll. Patent applicant: Mitsubishi Heavy Industries, Ltd. Patent attorney: Shibu Mitsuishi (and one other person)

Claims (1)

[Claims] A cold rolling line characterized in that a leveling mill and, optionally, a tension repeller equipped with an f-rider are installed between the final stand and the winding device of the cold rolling equipment or temper rolling equipment. array.