CN211889848U

CN211889848U - Continuous flattening unit for improving shape of hot-rolled coil

Info

Publication number: CN211889848U
Application number: CN202020447196.XU
Authority: CN
Inventors: 王野; 李远旭; 孙善波; 杜九歌; 包红军; 蒋维科; 郭久明; 徐帅; 何宇
Original assignee: Rizhao Baohua New Material Co Ltd
Current assignee: Rizhao Baohua New Material Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-10
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses an improve continuous leveling unit of hot rolling coil plate shape belongs to the steelmaking device field, its characterized in that: the device comprises an uncoiler, a pinch straightener, a slitting shear, a laser welding machine, a tension roller set, a deviation correcting roller, a loop, a leveler, a stretching straightener, an inspection bench, an outlet flying shear and a coiler; two uncoilers are arranged at an inlet; a pinch straightener is respectively arranged behind each uncoiler; a slitting shear is arranged behind each pinch straightener; a laser welding machine is arranged behind the two slitting scissors; a 1# tension roller set is arranged behind the laser welding machine; a loop and a deviation correcting roller are arranged behind the 1# tension roller set; and a 2# tension roller set, a temper mill, a 3# tension roller set, a stretching straightener, a 4# tension roller set, an inspection bench, a tension roller, an outlet flying shear and a coiling machine are sequentially arranged behind the loop. Compared with the prior art, the method has the characteristics of high yield and good plate shape.

Description

Continuous flattening unit for improving shape of hot-rolled coil

Technical Field

The utility model relates to a steelmaking device, in particular to a continuous temper mill suitable for hot rolling coil plate shape.

Background

The ESP technology is successfully developed, the thickness specification of the hot rolled plate is maximally thinned and expanded to 0.7mm, and due to the characteristics of the ESP technology, the control difficulty of the shape of the thin hot rolled plate is high, the shape is not subjected to flattening treatment and is directly used by a user, and the use requirements of the user cannot be met. The traditional hot-rolled coil flattening process adopts a single frame for flattening, the annual output is about 80 ten thousand tons, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The technical task of the utility model is not enough to above prior art, provides an improve hot rolling coil plate shape's continuous leveling unit.

The technical proposal of the utility model for solving the technical problem is that: the utility model provides an improve continuous levelling unit of hot rolling coil plate shape which characterized in that: the device comprises an uncoiler, a pinch straightener, a slitting shear, a laser welding machine, a tension roller set, a deviation correcting roller, a loop, a leveler, a stretching straightener, an inspection bench, an outlet flying shear and a coiler; two uncoilers are arranged at an inlet, namely an upper channel uncoiler and a lower channel uncoiler; a pinch straightener, namely an upper channel five-roll straightener and a lower channel five-roll straightener, is arranged behind each uncoiler, and each pinch straightener comprises an inlet pinch roll and a straightener; a slitting shear, namely an upper channel slitting shear and a lower channel slitting shear, is arranged behind each pinch straightening machine; a laser welding machine is arranged behind the two slitting scissors; a 1# tension roller set is arranged behind the laser welding machine; the tension roller group is used for realizing the separation and the adjustment of tension on a continuous production line of strip steel; a loop is arranged behind the No. 1 tension roller group; a loop inlet deviation correcting roller is arranged at a loop inlet, a 1# loop middle deviation correcting roller, a 2# loop middle deviation correcting roller and a 3# loop middle deviation correcting roller are respectively arranged in the loop, and a loop outlet deviation correcting roller is arranged at a loop outlet; a 2# tension roller set is arranged behind the loop, and a leveler is arranged behind the 2# tension roller set; a 3# tension roller set is arranged behind the temper mill, and a stretching straightener is arranged behind the 3# tension roller set; a 4# tension roller set is arranged behind the stretching straightener, and an inspection table is arranged behind the 4# tension roller set; a tension roller is arranged behind the inspection bench; an outlet flying shear is arranged behind the tension roller; and recoiling machines, namely a 1# recoiling machine and a 2# recoiling machine are arranged behind the outlet flying shear, and the strip steel is coiled after slitting.

The tension rollers are all 1200mm in roller diameter.

The maximum elongation of the leveler is designed to be 3%, and the maximum rolling force is 1500 tons.

Compared with the prior art, the utility model discloses following outstanding beneficial effect has:

1. the continuous flat production of the hot rolled coil is realized, and the production efficiency is improved;

2. the production line is additionally provided with a pulling and straightening unit, the strip steel plate shape can be further improved, and the production line comprises two bending roll boxes and a straightening roll. Can realize the two switching productions of the width 1250mm and the width 1500 mm.

Drawings

Fig. 1 is a prior art schematic.

Fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

As shown in fig. 2, the utility model discloses an uncoiler 1, pinch straightener 2, cut and cut 3, laser welding machine 4, tension roller set 5, correction roller, loop 10, levelling machine 13, tensile straightener 15, inspection desk 17, export flying shear 19 and coiling machine 20.

Two uncoilers 1 are arranged at an inlet, namely an upper channel uncoiler and a lower channel uncoiler respectively, and uncoil the hot-rolled strip steel. A pinch straightener 2, namely an upper channel five-roll straightener and a lower channel five-roll straightener, is arranged behind each uncoiler 1, and each pinch straightener 2 comprises an inlet pinch roll and a straightener; the bending straightening device is used for straightening the head bending of the thick steel coil so as to facilitate threading. A slitting shear 3, namely an upper channel slitting shear and a lower channel slitting shear, is arranged behind each pinch straightening machine 2; used for cutting off the parts of the strip with head and tail dimensions which are not qualified or defective. The laser welding machine 4 is arranged behind the two slitting shears 3, and the two hot-rolled coils are welded together through the laser welding machine 4, so that the continuous production of the unit is ensured, and the production efficiency is improved. The two steel coils need to satisfy the following conditions: firstly, the thickness difference of two steel coils is not more than 30% and 1.0 mm; and the width difference of the two steel coils is not more than 200 mm. And a 1# tension roller set 5 is arranged behind the laser welding machine 4. All tension rollers of the production line have the roller diameter of 1200mm, and the production line is suitable for producing high-strength steel with large tension, thick plates and wide plates. The tension roller group is used for realizing the separation and the adjustment of the tension on the continuous production line of the strip steel. The working principle of the tension roller is that the strip steel is wound on the tension roller, and friction force is generated at the winding contact part (namely a wrapping angle part) of the strip steel, so that tension difference is generated between the outlet and the inlet, the tension value of the strip steel at the inlet or the outlet of the tension roller is changed, and tension control is realized on a unit. The back of the 1# tension roller group 5 is provided with a loop 10. The loop 10 is designed to maintain the speed of the process section. The loop 10 ensures continuous operation of the process section during coil-up or welding operations at the inlet section and coil-down at the outlet section. A loop inlet deviation rectifying roller 6 is arranged at an inlet of a loop 10, a deviation rectifying roller 7 in a 1# loop, a deviation rectifying roller 8 in a 2# loop and a deviation rectifying roller 9 in a 3# loop are respectively arranged in the loop 10, and a loop outlet deviation rectifying roller 11 is arranged at an outlet of the loop 10. The deviation rectifying system is used for rectifying the strip steel on the production line on the center line of the unit and preventing the strip steel from causing production accidents and damaging equipment due to deviation. A2 # tension roller set 12 is arranged behind the loop 10, a leveling machine 13 is arranged behind the 2# tension roller set 12, and the leveling machine 13 adopts a dry leveling mode to improve the shape and the performance of hot-rolled coiled strip steel. The maximum elongation of the leveler 13 is designed to be 3%, the maximum rolling force is 1500 tons, and the leveler can perform the leveling production of high-strength steel such as 700L, 65Mn and the like. A3 # tension roller set 14 is arranged behind the leveling machine 13, and a stretching straightening machine 15 is arranged behind the 3# tension roller set 14. The stretching straightener 15 makes the strip continuously pass through a plurality of groups of small-diameter bending rollers which are alternately arranged up and down to be sharply bent under the action of tension, each longitudinal fiber of the strip steel generates plastic extension with different degrees along the length direction under the combined action of stretching and bending stress, the length of each longitudinal fiber tends to be consistent, thereby reducing the nonuniformity of internal stress distribution, and improving or eliminating the plate shape defect caused by the length difference of the longitudinal fiber. Finally, the plate shape defect is improved, the maximum elongation is 3 percent, and the two bending roll boxes and the 1 straightening roll are arranged. Can realize the two switching productions of the width 1250mm and the width 1500 mm. A4 # tension roller set 16 is arranged behind the stretching straightener 15, an inspection table 17 is arranged behind the 4# tension roller set 16, and the inspection table 17 is used for inspecting the surface quality of the strip steel by staff. A tension roller 18 is provided behind the inspection table 17. An outlet flying shear 19 is arranged behind the tension roller 18: the strip steel is coiled according to different weights, and the defects of the strip head and the strip tail can be removed at the same time. And a coiling machine 20, namely a 1# coiling machine and a 2# coiling machine, is arranged behind the outlet flying shear 19, and the coiling of the strip steel is realized after the slitting.

Traditional single frame level line annual output 80 ten thousand tons, through the utility model discloses level in succession and produce the line and can realize annual output 120 ten thousand tons, improved production efficiency.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an improve continuous levelling unit of hot rolling coil plate shape which characterized in that: the device comprises an uncoiler, a pinch straightener, a slitting shear, a laser welding machine, a tension roller set, a deviation correcting roller, a loop, a leveler, a stretching straightener, an inspection bench, an outlet flying shear and a coiler; two uncoilers are arranged at an inlet, namely an upper channel uncoiler and a lower channel uncoiler; a pinch straightener, namely an upper channel five-roll straightener and a lower channel five-roll straightener, is arranged behind each uncoiler, and each pinch straightener comprises an inlet pinch roll and a straightener; a slitting shear, namely an upper channel slitting shear and a lower channel slitting shear, is arranged behind each pinch straightening machine; a laser welding machine is arranged behind the two slitting scissors; a 1# tension roller set is arranged behind the laser welding machine; the tension roller group is used for realizing the separation and the adjustment of tension on a continuous production line of strip steel; a loop is arranged behind the No. 1 tension roller group; a loop inlet deviation correcting roller is arranged at a loop inlet, a 1# loop middle deviation correcting roller, a 2# loop middle deviation correcting roller and a 3# loop middle deviation correcting roller are respectively arranged in the loop, and a loop outlet deviation correcting roller is arranged at a loop outlet; a 2# tension roller set is arranged behind the loop, and a leveler is arranged behind the 2# tension roller set; a 3# tension roller set is arranged behind the temper mill, and a stretching straightener is arranged behind the 3# tension roller set; a 4# tension roller set is arranged behind the stretching straightener, and an inspection table is arranged behind the 4# tension roller set; a tension roller is arranged behind the inspection bench; an outlet flying shear is arranged behind the tension roller; and recoiling machines, namely a 1# recoiling machine and a 2# recoiling machine are arranged behind the outlet flying shear, and the strip steel is coiled after slitting.

2. A continuous temper mill for improving the shape of a hot rolled coil as claimed in claim 1, wherein: the tension rollers are all 1200mm in roller diameter.

3. A continuous temper mill for improving the shape of a hot rolled coil as claimed in claim 1, wherein: the maximum elongation of the leveler is designed to be 3%, and the maximum rolling force is 1500 tons.