SU1653870A1 - Method of cold rolling the reeled strips on a reversing mill - Google Patents

Abstract

The invention relates to rolling production, in particular to the cold rolling of strips on a reversing mill. The purpose of the invention is to save metal and increase productivity by simultaneously cleaning the finished coil and welding. The method includes coarsening the coils by butt gparki adjacent bands, removing burr rolling strips, separating strips and winding strip strips Before butt welding of the unwrapped ends of the strips rolled section and rolled together with the second roll 1 and / 1

Description

The invention relates to rolling production, in particular, to cold rolling of strips on reversing mills,

The purpose of the invention is to save metal and increase productivity by simultaneously cleaning the finished roll and welding.

The method consists in rolling the strips without crimping the front and rear ends, as they are fixed on the coiler, then the uncompressed end of the previous roll is cut off, welded to the subsequent roll and carried out the subsequent rolling.

The drawing shows the installation that implements the proposed method of rolling.

The installation includes a rear winder 1, a straightening machine 2, end shears 3, a docking machine 4, a reamer 5, a roller press wiring 6, a rolling (reversible) cage 7, dividing shears 8 and a front winder 9.

The method is carried out as follows.

After winding onto the dump cabinet 9, the first strip of the finished strip 10 that has been rolled into the mill has been cut into sections 7, cut off with dividing scissors 8 and after removing the roll, the sealing strip is loaded into the winder 9 at the same time freeing the rear end of the first strip from the winder 1, right the correct machine 2, trimmed with scissors 3 and fed to the butt welding machine 4. At the same time, a second roll is mounted on the winder 1, the front end is also fed to the butt welding machine, and after the ends of the roll, the deburring on the rammer 5 is made locally rolling the rear end portion of the first coil strip and the second coil strip until the final thickness is obtained.

The method was tested in laboratory laboratories x on a mill with a diameter of working rolls of 70 mm and supporting 100 mm. Rolled strip of steel 08 P with a thickness of 6 mm.

cl

with

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mm wide and 3.0 m long at a speed of 0.22 m / s. Strip rolled in reverse mode to a thickness of 0 mm in three passes. The first strip is rolled in a known manner. Since the front and rear winders on the mill are mounted on

a distance of 200 mm; the length of the unrolled front and rear sections of the strip is equal to 890 mm, which is 29.6%. Three other similar strips rolled by the proposed method. In this case, after rolling the first strip, the rolled portion thereof is cut off and removed from the winder. The remaining portion (partially crimped and uncompressed) is loaded into the coiler, and the front end of the strip of the second coil mounted on the rear coiler is welded to the rear end of the first strip.

When using the invention, the quality of the strip surface is improved, as well as an increase in the mill productivity by increasing the tension of the strip between the stand and the winders.

Claims (1)

Claims of the Invention A method of cold rolling strips in rolls on a reversing mill, including rolling strips without crimping the front and rear ends attached to the coiler, and winding into a roll, characterized in that. what. in order to save metal and increase productivity by simultaneously harvesting the finished roll and welding, the uncompressed end of the previous roll is cut, welded to the subsequent roll and then rolled.