JPH01148404A - Rolling mill - Google Patents

Abstract

PURPOSE:To freely change a width of a strip by combining a cutting device equalizing edge shapes after trimming the strip and a work roll shift mill for a facility performing cold rolling or skin-pass rolling of the strip. CONSTITUTION:A continuous line facility is formed by directly connecting a pickling device provided with a strip edge equalizing device 4 and a finishing mill with a work roll shift mill 5. A strip 1 is supplied from a payoff reel 2, is passed through a pickling tank 15, is trimmed by a side trimmer 3, is removed its burrs by an edge cutting device 4, is subjected to finishing rolling by a work roll shift mill 5, and then is wound. The edge cutting device 4 is provided with a rotating drum 8 whose periphery has several cutting tools 8; burrs generated by trimming the strip 1 are removed by rotation of the drum 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to equipment using a work roll shift mill, and particularly to a strip edge shape processing device suitable for the entrance side of a cold rolling mill.

[Conventional technology]

The conventional ear shape processing device after side trimming was developed in 1973.
As described in Publication No. 1-21088, this is an edge forming method for the purpose of improving edge performance after side trimming of a hot rolled steel sheet, and its feature is that defective edge portions after side trimming are removed by grinding with a rotating grindstone. was. In other words, by removing the work-hardened parts and micro-cracks during trimming, it was discussed how to prevent edge cracks after cold pressing and, in turn, plate breakage accidents.

[Problem that the invention seeks to solve]

By the way, removing the defective edge portion after trimming has the effect of reducing damage to the work roll in the subsequent cold rolling process. However, in actual rolling, a strip of a certain width is continuously rolled, so even if the burrs are removed, damage to the roll surface and uneven gloss caused by the edges of the strip cannot be avoided. For this reason, rolling mills have adopted a method of changing the coil width from wide to narrow. Conventionally, it was impossible to return to the wide width unless the work rolls were rearranged, which was a major bottleneck in improving operating efficiency. .

It is an object of the present invention to prevent damage to the roll that is insufficient by removing only the burrs on the edges of the strip caused by trimming, by shifting the work roll, and to freely change the strip width, so-called schedule-free. This realizes rolling.

[Means for solving problems]

The present invention is achieved by combining a work roll shift mill with an appropriate end face processing device for removing burrs at both ends of the strip that occur due to trimming on the entry side of the mill.

[Effect]

As shown in Fig. 2, the strip end surface processing device brings a rotating body with cutting blades into contact with the places where burrs occur on both end faces of the strip 1, and removes burrs using several cutting blades attached to each rotating body. . A motor is attached so that the speed of the rotary blade can be adjusted depending on the line speed, but there are two
Since the cutting is done twice as fast, the cut surface will be flat and curved, and any burrs will be removed. Also, the inclination angle of the edge is usually about 3 from the viewpoint of the function of the work roll shift mill 5.
Although 0″' is desirable, it varies depending on the thickness of the plate and the amount of warping, so the inclination angle can be adjusted.Furthermore, the strip is pressed by a roller, and the amount of cut can be set arbitrarily.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a continuous line facility in which a pickling facility equipped with the strip edge processing device of the present invention is directly connected to a finishing mill and a work roll shift mill 5. A strip 1 is unwound from a payoff reel 2, After passing through the pickling tank 15, it is trimmed by the sight droop 3, the burr is removed by the strip edge processing device 4, and after finishing rolling by the work roll sifter mill 5, it is transferred to the carousel reel 6.
The strip is wound up. The structure of the strip edge processing device will be explained with reference to FIGS. 2 and 3. Both ears of strip 1 trimmed by site dreamer 3 are 1
A burr with a height of 7 and a burr height h is generated, and this burr is sharp and work-hardened, and if left as is, it will cause a large scratch on the work roll during rolling, which will be a problem.

The configuration of the selvedge processing device 4 is such that a rotating drum 9 equipped with several blades 8 around its circumference is installed at an angle of θ2 along the cutting surface of the burr. Since θ2 varies depending on the biting property of the work roll shift mill 5, the amount of the burr height h, and the material of the strip 1, a pin joint 13 is provided so that it can be adjusted. Further, the rotating drum 9 needs to be driven faster than the flow speed of the strip 1, and a driving motor 11 is directly connected thereto. When cutting the strip 1 in burrs, a roller 7 is used to press the strip against a blade 8, and a cylinder 10 is used to adjust the pressure.

If the plate width is different, it can be adjusted using the screw 12 and a drive device (not shown). Figure 5.

FIG. 6 shows a conventional edge grinding method after trimming, which is aimed at removing minute cracks 18 on the end face.

According to this embodiment, the cutting range 1 shown in the shaded area in FIG.
6 is cut and the burr is completely removed.

The strip from which the burrs have been removed is further rolled by the work roll shift mill 5, but at this time, since removing the burrs alone cannot sufficiently remove the scratches on the work roll caused by the strip edges, the strip is further rolled by the work roll shift. Distribute and prevent.

The above embodiment is an example in which the pickling equipment and the rolling equipment are directly connected, but first, a case where the two equipments are not directly connected will be described.

Conventionally, the side trimmer and return device were installed on the outlet side of the pickling line when both equipment were installed independently.

However, the return device used in the present invention should be installed on the entrance side of the rolling equipment. The first reason is that, as mentioned earlier, the purpose of installing this equipment is primarily to solve various problems in the rolling process rather than the pickling process, and the operation and maintainability of the pickling equipment itself are considered. Therefore, it is more convenient to omit the installation in the pickling equipment, especially in equipment where the side trimmer is used infrequently or where the side trimmer itself is not installed. Because it will be.

The second and more important reason is that if a return device is installed in the pickling equipment, in the unlikely event that the device is not operating properly and is in an inappropriate condition. Usually 1
Discovered during the rolling operation a few days later, all of the large quantities of coils that had been processed in the pickling line during that time were
It becomes necessary to carry out the return work again in an appropriate state, resulting in confusion in the production process and loss due to duplication of work.

On the other hand, if a return device is installed on the entrance side of the rolling equipment,
The combination of the turning device and work roll shift is used to monitor and confirm the effectiveness of preventing damage to work rolls during operation, and if inappropriate operation of the turning device is discovered, the rolling operation is immediately stopped and appropriate measures are taken. If the condition is restored, coils that have been improperly returned and processed will hardly occur, and the confusion and loss in the process described above can be prevented.

FIG. 7 shows an embodiment in the case described above. In this case, after the strip is unwound from the payoff reel 2, the edges are properly processed by the edge processing device 4, and the strip is wound by the work roll shift mill 5. After being taken, it is wound up by a carrousel type winder 6.

Although the above example deals with the case in which side trim was performed, coils without side trim can also be modified by appropriately processing the strip edge shape in the hot-rolled state on the entry side of the rolling mill. Of course, the effects of the present invention can be obtained.

In addition, work roll shift has conventionally been used to control the strip shape in rolling, but when combined with the present invention,
There is no longer a restriction on the shift position of the roll that was conventionally caused by the occurrence of marks on the roll, and a greater shape control function can be obtained.

Note that the rolling mill in the present invention may be of any type as long as it has a work roll shift, and there is no restriction on the number of stands of the rolling mill having a work roll shift.

Further, the present invention is effective not only for cold rolling equipment but also for illicit rolling equipment, and on the other hand, the directions of the upper and lower work rolls may be the same or opposite.

〔Effect of the invention〕

According to the present invention, it is possible to improve the operating rate of rolling equipment and to eliminate bottlenecks in production planning, thereby achieving great effects.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of continuous lines according to an embodiment of the present invention;
The figure is a front view of the strip edge processing device, Figure 3 is a sectional view of the strip, Figure 4 is a view taken along the line IV-IV in Figure 2,
5 and 6 are explanatory diagrams of the conventional strip edge forming method, and FIG. 7 is a continuous line layout diagram of another embodiment of the present invention. 1...Strip, 2...Payoff reel, 3...
・Sai-" Figure 1 74' Figure 3 Figure 4 Figure 6-7

Claims (1)

[Claims] 1. In a rolling equipment for cold rolling or temper rolling a strip, a processing device for shaping the edge shape of the strip is provided on the entrance side of the rolling mill, and a pair of upper and lower work rolls are provided in the rolling mill. A rolling facility characterized by being equipped with a work roll shift device that moves the work rolls in the axial direction.