JPS61162203A - Continuous type single stand cold rolling equipment - Google Patents

Abstract

PURPOSE:To reduce the equipment cost by providing a coil re-winder, welder and storing device on the inlet side of a rolling mill and by arranging a cutting device and coiler on the outlet side. CONSTITUTION:A coil re-winder 3, welder 5 and strip steel storing device 6 are installed on the inlet side of a single stand cold rolling mill. A strip steel cutting device 7 and coiler 4 are then arranged on the outlet side of the rolling mill 2, also coil cars 8, 9 are arranged at the inlet side and outlet side respectively. With this mechanism, the recoiling of the succeeding coil can be started while the strip steel inside the storing device 6 is fed out in order when the coil re-winding of a recoiler 3 is finished. The welder 5 can connect moreover the tail end of the preceding strip steel and the tip part of the succeeding strip steel. The rolling is therefore performed continuously and the equipment cost can be reduced comparing with a tandem type.

Description

[Detailed Description of the Invention] (Industrial Application Field) Regarding the improvement of single-stand cold rolling equipment, the technical content described in this specification is applicable to cold rolling conventionally performed in single-stand equipment, especially for special steel. The purpose of this paper is to propose the development results of rolling equipment that can more effectively perform cold rolling to obtain small-lot products using inexpensive equipment.

(Prior Art) Single-stand cold rolling equipment generally has a layout in which a reversible rolling mill called a lever mill and coil unwinding and winding machines are installed on both sides of the rolling mill.

In the above rolling equipment, in order to roll the material to be rolled (hereinafter referred to as steel strip), the coil is first attached to the coil unwinding machine/winding machine, and the tip of the copper strip is placed on the opposite side of the rolling mill. The coil is wound on the other coil unwinding machine and winding machine equipped with the coil unwinding machine, and then rolled at an appropriate reduction rate until the trailing end of the strip is just before it comes out of the coil unwinding machine and winding machine (this is when it stops). The first rolling is completed.The second rolling is performed in the opposite direction to the first rolling direction, and the rolling is repeated several times to obtain a product with a predetermined thickness.

However, the cold-rolled products obtained by this type of rolling have problems such as unrolled parts remaining at the leading and trailing ends of the rolled material and off-gauges occurring during rolling, resulting in poor product yield. Since the reverse mill requires deceleration and stop every time, the rolling efficiency is very poor.

However, the work rolls used in lever mills have the disadvantage that due to severe roll wear on the rolling edges, it is necessary to replace the rolls during final finishing rolling, and the roll consumption rate is also poor.

Although continuous tandem mills such as those disclosed in Japanese Patent Publication No. 58-8'458' No. 2 do not have the above-mentioned problems, they are used as rolling equipment for small-lot products such as special steel. There are problems such as requiring a rolling stand, the construction cost of the equipment is high, and the rolling technology requires advanced technology.

(Problems to be Solved by the Invention) By overcoming the above-mentioned difficulties in single-stand cold rolling equipment such as off-gauge, rolling efficiency, and roll consumption,
It is an object of this invention to provide a more efficient single stand cold rolling facility.

(Means for Solving the Problems) The present invention provides a coil unwinding machine 8, a welding machine, and a welding machine on the entry side of a rolling mill 2 that rolls a material to be rolled in one direction in a single-stand cold rolling facility. It is a continuous single-stand cold rolling facility, in which a material storage device 6 is installed, and on the exit side of the rolling mill 2, a nine rolled material cutting device 7 and a coil winding machine 4 are installed.

Fig. 1 is a side view of a continuous single-stand cold rolling facility.
a' ) is the coil winding machine, and 5 is the advance! 1 a welding machine that connects the rear end of the belt to the leading end of the trailing steel strip; 6 a copper strip storage device; 7 a copper strip cutting device; 8 and 9 a coil car;
0 is a deflect roll.

(Function) Even if the coil unwinding by the unwinding machine 8 has finished unwinding, while the coil is being sequentially fed out from the steel strip storage device 6 provided at the entrance side of the rolling mill 2, Since it is attached to the trailing coil unwinding machine 8 and unwinding is started, the tail end of the leading steel strip and the tip end of the trailing steel strip can be joined together by the welding machine 5.

Therefore, by sequentially unwinding the coils using the coil unwinding machine 8, it is possible to continuously roll a plurality of coils.

Further, the exit side of the rolling mill 2 is equipped with a steel strip cutting device 7 and a coil winding machine 4, and the strip continuously rolled by the rolling mill 2 is wound up by the coil winding machine 4.

Here, this coil winding machine 4 is e[[31i9-10
It is called Calo-Zerul, which is disclosed in Publication No. 17, and is 4 a s as shown in Figure 1.
4 a' It has two reels. For example reel 4
Even if the steel strip being wound in step a is cut by the μm4 < running shearing device of the steel strip cutting device 7 and the winding is finished, the leading end of the trailing steel strip is shown through the deflector roll 10. However, by winding the trailing steel strip around the reel 4aj using a belt wrapper or the like, it is possible to continue winding the trailing steel strip without stopping the rolling mill 2.

Therefore, the copper strip continuously rolled by the rolling mill 2 is rolled by the reels 4a and 4a', after the coils of the reel 4a are extracted, the reel 4a' is moved to the position of the reel 4a, and the reel 4a is moved to the position of the reel 4a.
It is only necessary to exchange the position of the reel 4 al to the position of the reel 4 al and repeat winding alternately.

Note that although a carousel reel is used as the winder 4, it goes without saying that two ordinary winders may be used in series.

Furthermore, when repeatedly rolling a plurality of coils wound by the coil winding machine 4, a device is provided to sequentially convey the coils taken out from the winding machine 4 to the input side of the rolling machine 2, and the coils are wound again. The coil may be unwound and rolled using the unwinding machine 8. - (Example) An example will be described below.

FIG. 2 is a plan layout diagram of the continuous single-stand cold rolling equipment used in the example. The coil conveying device shown in FIG. 2 is a device for conveying the coils sequentially wound by the coil winding machine 4 to the coil unwinding machine 8 installed at the entrance side of the rolling mill 2. .

Here, the means for transferring the coil wound by the coil winding machine 4 onto the conveying device is performed by a coil car 9.
A coil car 8 is used to transfer the coil from the conveying device to the coil unwinding machine.

, 1 by Joki equipment si: l. A total of 10 coils (coil/1fliA-J) of silicon steel plate coils (thickness: 2.2 mm, width: 1000 mm) containing Owt% were continuously rolled. In the figure, A to J indicate the fill shop, and show the coil rolling process and the coil conveyance situation in the fill conveyance device.

The number of rolling times for each coil is 8 times, and the I & end plate thickness is 0, [1
Finished easily.

Figures 8 fa) and 8 fb) show a comparison between the results of rolling performed using the equipment according to the present invention and the results obtained when rolling was performed under the same conditions using a 4-layer lever mill.

As is clear from the figure, by continuously rolling a plurality of coils, the off-gauge ratio was extremely reduced compared to conventional rolling, and the rolling efficiency was also improved by 1.7 times.

In addition, when rolling is performed using a conventional four-layer lever mill, the wear of the work rolls is significant and the work rolls have to be replaced every time one coil is finished. In this case, even if the work roll is worn out, if it is replaced with a new roll at the 8th rolling and the final rolling is performed, there is no particular effect on the quality of the product, and the work roll required to roll 10 coils is 2 Se
I got away with t.

(Effects) According to this invention, since the rolling operation is continuous, there are
This equipment is extremely advantageous in terms of product cost, and can reduce equipment costs compared to continuous tandem equipment, etc., and is particularly suitable for rolling special steel and other products in small lots.

[Brief explanation of drawings]

Figure 1 is a side view of continuous single-stand cold rolling equipment, Figure 2 is a plan layout diagram of continuous single-stand cold rolling equipment, and Figure 8 (aHb) shows the rolling performed by this invention and the conventional lever mill. It is a graph comparing the OR gauge factor and rolling efficiency in rolling performed in . ■... Material to be rolled (coil) 2... Single stand rolling machine 8... Coil unwinding machine 4... Coil winding machine 5
... Welder 6... Copper strip storage device (louver) 7... Steel strip cutting equipment [8... Coil car 9... Coil car 10... Deflect roll patent applicant Kawasaki Steel Co., Ltd. Figure 1 Figure 1 (a) Figure 3 fb] Interrogator Honmai Fufu Akira

Claims (1)

[Claims] 1. In a single-stand type cold rolling facility, a coil unwinding machine 8, a welding machine 5, and a rolled material storage device 6 are installed on the entry side of a rolling mill 2 that rolls rolled materials in one direction. A continuous single-stand cold rolling facility is equipped with a rolled material cutting device 7 and a coil winding machine 4 on the exit side of the rolling mill 2.