CN113198846A

CN113198846A - Method for protecting roller patterns during rolling of extremely-thin gauge plate

Info

Publication number: CN113198846A
Application number: CN202110533675.2A
Authority: CN
Inventors: 杨程; 刘勇; 李卫平; 王登刚; 付开忠
Original assignee: Pangang Group Xichang Steel and Vanadium Co Ltd
Current assignee: Pangang Group Xichang Steel and Vanadium Co Ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-08-03

Abstract

The invention discloses a method for protecting a roll pattern during rolling of an extremely thin plate. When the pattern roll is no-load, the roll gap between the upper and lower rolls of the pattern roll is increased to reduce the wear of the pattern on the pattern roll when the roll is no-load. , before the ultra-thin gauge plate to be rolled enters the patterned roller, adjust the gap between the upper and lower rollers of the patterned roller to ensure that the distance between the upper and lower rollers of the patterned roller meets the rolling pressure of the ultra-thin gauge plate to be rolled. , to ensure the rolling effect of the ultra-thin gauge plate to be rolled. In the method for protecting the pattern of the roll during the rolling of the ultra-thin gauge plate disclosed in this solution, the service cycle of the pattern roll is increased from 3-4 times to 4-5 times, which prolongs the service life of the pattern roll and realizes the realization of the ultra-thin gauge pattern plate at the same time. batch rolling.

Description

Method for protecting roller patterns during rolling of extremely-thin gauge plate

Technical Field

The invention relates to the technical field of metallurgical industry, in particular to a method for protecting roll patterns during rolling of an extremely thin gauge plate.

Background

The checkered plate has the characteristics of attractive appearance, skid resistance, easiness in cleaning, steel saving and the like. When the pattern plate with the ultrathin specification is subjected to finish rolling, the reduction rate is high, the rolling load is heavy, and the rolling mill has rolling pressure of about 400T when the rolling mill is in no-load, so that the patterns of the rolls which are rolled off after the pattern plate with the ultrathin specification is rolled are all damaged seriously, the service cycle of the pattern rolls of the rolling mill is shortened, and the production cost of enterprises is increased.

Therefore, how to prolong the service life of the checkered roller of the lower rolling mill becomes a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, the present invention provides a method for protecting roll patterns during rolling of an extremely thin gauge plate, so as to prolong the service life of a pattern roll of a lower rolling mill.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for protecting roll patterns during rolling of an extremely thin gauge plate comprises the following steps:

1) the roll gap of a patterned roll of a rolling machine is enlarged, and the rolling pressure of the patterned roll is reduced;

2) feeding the ultrathin gauge plates to be rolled into a rolling machine, wherein the rollers positioned in front of the pattern rollers of the rolling machine roll the ultrathin gauge plates to be rolled in sequence;

3) when the ultrathin gauge plate to be rolled enters at least one roller positioned in front of the checkered roller, the roller gap of the checkered roller is reduced, the rolling pressure of the checkered roller is increased, and the at least one roller positioned in front of the checkered roller and the checkered roller are used for rolling the ultrathin gauge plate to be rolled in sequence.

Preferably, in the method for protecting a roll pattern in rolling of the ultrathin gauge plate, the pattern roll of the rolling mill is a pattern roll after the rolling is performed 2 to 3 times.

Preferably, in the method for protecting a roll pattern in rolling of the ultrathin gauge sheet, the step 3) further includes a step 31):

when the patterned rollers roll the tail part of the ultrathin gauge plate to be rolled, the patterned rollers are lifted linearly and automatically at the speed of 0.05-0.1mm/s, and the roll gap between the patterned rollers is increased by 0.3-0.5 mm.

Preferably, in the method for protecting a roll pattern in rolling of an extremely thin gauge plate, in the step 31), the length of the tail is at least 10 m.

According to the method for protecting the roll patterns during rolling of the ultrathin gauge plate, provided by the invention, when the pattern roll is in no-load, the roll gap between the upper roll and the lower roll of the pattern roll is increased, the abrasion of the patterns on the pattern roll during no-load is reduced, before the ultrathin gauge plate to be rolled enters the pattern roll, the roll gap between the upper roll and the lower roll of the pattern roll is decreased, the distance between the upper roll and the lower roll of the pattern roll is ensured to meet the rolling pressure of the ultrathin gauge plate to be rolled, and the rolling effect of the ultrathin gauge plate to be rolled is ensured. According to the method for protecting the roller patterns during rolling of the ultrathin specification plate, the service cycle of the pattern roller is prolonged from 3-4 times to 4-5 times, the service life of the pattern roller is prolonged, and batch rolling of the ultrathin specification pattern plates is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method for protecting a roll pattern during rolling of an extremely thin gauge sheet according to an embodiment of the present invention.

Detailed Description

The invention discloses a method for protecting roller patterns during rolling of an extremely thin gauge plate, which is used for prolonging the service life of a pattern roller of a lower rolling mill.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1.

The invention discloses a method for protecting roll patterns during rolling of an extremely thin gauge plate, which comprises the following steps:

1) the roll gap of a checkered roll of a rolling machine is adjusted to be large, the rolling pressure of the checkered roll is reduced, and the final arrangement of the checkered roll is carried out when an extremely thin specification plate to be rolled tracks and activates the checkered roll;

2) feeding the ultrathin gauge plate to be rolled into a rolling machine, wherein a roller of the rolling machine positioned in front of the pattern roller sequentially rolls the ultrathin gauge plate to be rolled;

3) when the ultrathin gauge plate to be rolled enters at least one roller positioned in front of the checkered roller, the roller gap of the checkered roller is reduced, the rolling pressure of the checkered roller is increased, and the at least one roller and the checkered roller roll the ultrathin gauge plate to be rolled in sequence.

Normally, the checkered roller is arranged when receiving data of an extremely thin gauge plate to be rolled, but when the extremely thin gauge plate is rolled, because the rolling between an upper roller and a lower roller of the checkered roller is large and the roller characteristics of the checkered roller are high, the rolling pressure of about 300 tons still exists between the upper roller and the lower roller when the checkered roller is in no load, the abrasion of the checkered roller can be intensified by keeping the rolling pressure for a long time, and therefore when the position is pre-arranged, the checkered roller selects a large roll gap, and when the finish rolling tracking is activated, the final arrangement of the checkered roller is carried out, so that the abrasion of the checkered roller is reduced.

And finally, the position is set to reduce the roll gap between the upper and lower rolls of the patterned roll to the rolling distance.

The finish rolling tracking is activated by a signal that the ultrathin gauge plate to be rolled enters at least one roller positioned in front of the checkered roller, namely the ultrathin gauge plate to be rolled enters the checkered roller immediately after passing through at least one roller positioned in front of the checkered roller, further, at least one roller positioned in front of the checkered roller is at least one roller closest to the checkered roller in the conveying direction, the roller closest to the checkered roller is a first roller, the roller next to the checkered roller is a second roller, and the like. Preferably, the roll gap of the patterned roll is adjusted at a time point when the extremely thin gauge plate to be rolled enters the second roll before the patterned roll.

In the process of adjusting the roll gap by the patterned roll, the ultrathin gauge plate to be rolled is rolled on the roll all the time without stopping the machine.

After the rolling rolls before the pattern roll the ultrathin gauge plate to be rolled in sequence, patterns are rolled on the ultrathin gauge plate to be rolled through the pattern roll.

Because the thickness of the ultrathin gauge plate to be rolled is thinner, if the roller with the newly ground pattern is used for rolling, the possibility of breaking the ultrathin gauge plate to be rolled exists, and therefore the pattern roller of the rolling machine adopts the roller with the reduced pattern thickness after being operated for 2-3 times.

The method for protecting the roller patterns during rolling of the ultrathin gauge plate disclosed by the scheme has the advantages that the step 3) also comprises the step 31) that when the pattern roller rolls the tail part of the ultrathin gauge plate to be rolled, the upper roller of the pattern roller needs to be lifted, so that the roll gap of the pattern roller is increased by 0.3-0.5mm, and the pattern abrasion of the pattern roller caused by the fact that the tail part of the ultrathin gauge plate to be rolled is rolled thoroughly and the like is avoided.

Specifically, when the checkered plate is rolled, when the tail part of the ultrathin gauge plate reaches the last but one roller of the rolling machine, the checkered roller of the checkered roller frame starts to be lifted up linearly and automatically at the speed of 0.05-0.1mm/s, and when the tail part of the ultrathin gauge plate reaches the checkered roller frame, the roller gap of the checkered roller frame is increased by 0.3-0.5 mm.

Preferably, the roll gap of the patterned roll is increased when at least 10m remains at the tail of the extremely thin gauge plate to be rolled.

According to the method for protecting the roller patterns during rolling of the ultrathin specification pattern plate, the service cycle of the pattern roller is prolonged from 3-4 times to 4-5 times, and batch rolling of the ultrathin specification pattern plate is realized.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. a method for protecting roll pattern during rolling of an extremely thin gauge plate, is characterized in that, comprises the steps:

1) Increase the roll gap of the pattern roll of the rolling mill and reduce the rolling pressure of the pattern roll;

2) sending the ultra-thin gauge plate to be rolled into a rolling mill, and the rolls of the rolling mill located in front of the patterned rollers sequentially roll the ultra-thin gauge plate to be rolled;

3) When the ultra-thin gauge plate to be rolled enters at least one roll located before the patterned roll, the roll gap of the patterned roll is reduced, and the rolling pressure of the patterned roll is increased, and the rolling pressure of the patterned roll is increased. At least one of the rolls before the pattern roll and the pattern roll sequentially roll the ultra-thin gauge plate to be rolled.

2 . The method for protecting a roll pattern during rolling of an ultra-thin gauge plate according to claim 1 , wherein the pattern roll of the rolling machine is a pattern roll after 2-3 times of rolling. 3 .

3. The method for protecting the pattern of the roll during rolling of the ultra-thin gauge plate according to claim 1, wherein the step 3) further comprises a step 31):

When the patterned rollers roll the tail of the ultra-thin gauge plate to be rolled, the patterned rollers are automatically lifted linearly at a speed of 0.05-0.1 mm/s, increasing the roll gap between the patterned rollers 0.3-0.5mm.

4 . The method for protecting the roll pattern during rolling of an ultra-thin gauge plate according to claim 3 , wherein, in the step 31), the length of the tail is at least 10m. 5 .