CN112246874B - Method for reducing edge peeling of supporting roll of heavy and medium plate mill - Google Patents

Method for reducing edge peeling of supporting roll of heavy and medium plate mill Download PDF

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Publication number
CN112246874B
CN112246874B CN202011060034.1A CN202011060034A CN112246874B CN 112246874 B CN112246874 B CN 112246874B CN 202011060034 A CN202011060034 A CN 202011060034A CN 112246874 B CN112246874 B CN 112246874B
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roll
roller
curve
edge
supporting
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CN112246874A (en
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杨立庆
饶静
邓杭州
王小庆
牛庆林
李栋
陈�全
杨冰
付勇清
徐军来
周敏
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Anyang Iron and Steel Co Ltd
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Anyang Iron and Steel Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Abstract

The invention discloses a method for reducing edge peeling of a backup roll of a heavy and medium plate mill, which is characterized in that the contour of the roll body of the backup roll is processed into a smooth curve, the curve is symmetrical by taking the length center line of the roll body as the center line, and the contour of each half roll body is curvedThe line can be represented by a curve of a cubic function, the equation of the curve being: y (x) = a 1 x 1 +a 2 x 2 +a 3 x 3 +a 4 x 4 +a 5 x 5 +a 6 x 6 +a 7 x 7 X represents the distance of the processing point from the central line of the length of the roller body; y (x) represents the grinding amount of the edge of the profile of the body of the supporting roller; a is 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 Respectively correspond to: a is 1 =1.32700475×10^(‑02)；a 2 =‑3.26565893×10^(‑05)；a 3 =4.62833359×10^(‑08)；a 4 =‑4.03695526×10^(‑11)；a 5 =2.14322108×10^(‑14)；a 6 =‑6.34965142×10^(‑18)；a 7 And (3) the formula is 8.03622166 multiplied by 10 (-22). The supporting roller with the contour shape of the roller body can reduce stress concentration at the end part of the roller in the rolling process, reduces peeling of the edge part of the roller, can be continuously processed and formed, is simple and easy to operate in the grinding process, and can prevent the roller body from colliding with a probe on a measuring arm during flaw detection by using a smooth curve, so that flaw detection in the full-length direction of the roller body of the roller is realized, and potential defects of the roller are timely discovered and eliminated.

Description

Method for reducing edge peeling of supporting roll of heavy and medium plate mill
Technical Field
The invention relates to the technical field of metal material processing equipment, in particular to a method for reducing edge peeling of a supporting roll of a heavy and medium plate mill.
Background
The backup roll is a main processing tool on a heavy and medium plate mill, and the rolling force is transmitted to the backup roll through the working roll during rolling so as to maintain the rigidity and the strength of the roll system. On one hand, the supporting roll is subjected to deflection deformation under the action of a couple of rolling force and pressing force, so that the shape of a roll gap is changed, meanwhile, the contact pressure between the working roll and the supporting roll is unevenly distributed, and the stress at two ends of the roll is concentrated; on the other hand, in order to counteract the bending deformation of the roll, the rolling mill is usually provided with a work roll bending device, and the roll gap shape is ensured by applying a force opposite to the bending direction of the roll at the two ends of the work roll. Under the action of the roll bending force, stress concentration at two ends of the working roll and the supporting roll is more intensified, and researches show that the contact stress between the end rolls of the roll is 2-3 times higher than that between the end rolls of the roll, and the hardness of the supporting roll is usually lower than that of the working roll due to the requirement of a rolling process, so that serious accidents such as stripping and block falling caused by overlarge stress at the end parts of the supporting roll are caused, and huge economic loss is caused.
In order to solve the problem of peeling of the edge of the supporting roller, a method for chamfering the edge of the supporting roller is generally adopted in the industry, namely: a chamfer is processed at the end part of the supporting roller body, so that the end part of the working roller is separated from the end part of the supporting roller in space, and the aim of eliminating the stress concentration at the end part is expected to be achieved. However, in the actual use process, after the end part of the supporting roller is chamfered, although the stress concentration at the most end part is improved, a new stress concentration area is formed at the sharp transition position formed at the chamfered part, and the damage effect on the end part of the roller is still realized. In order to accomplish the processing of chamfer, when the backing roll grinding, earlier whole grinding after the barrel, then respectively at two tip processing chamfers of backing roll, the course of working is complicated loaded down with trivial details, simultaneously because the backing roll barrel tip adopts the chamfer, barrel profile shape is not a continuous smooth transition, when detecting a flaw on the grinding machine, the barrel collides the probe on the measuring arm very easily, consequently limit chamfer district is usually not detected a flaw, can lead to the unable timely discovery of limit latent defect like this, the backing roll is used repeatedly for a long time and is made the defect constantly expand, finally form the roll and peel off.
On the other hand, the backup rolls play an important role in the control of the plate shape. Therefore, the design of the supporting roller needs to consider not only the problem of edge peeling but also the problem of plate shape control. When the edge chamfering roller is used for designing chamfering, if the chamfering is too small, the edge avoiding effect cannot be realized, and if the chamfering is too large, the deformation of the chamfering part in a rolling area is too severe, so that the control of the plate shape is influenced.
The existing sextuple curve design of the supporting roller is to process the edge of the supporting roller into a smooth transition curve, and compared with an edge chamfer roller, the application effect is improved. However, because the highest order term of the roller profile curve is too low, the ideal application effect can not be achieved on the contradiction of plate shape control and edge avoidance for preventing the roller from peeling.
Disclosure of Invention
The invention aims to provide a method for reducing the edge peeling of a back-up roll of a heavy and medium plate mill, in particular to a method for processing the contour of the body of the back-up roll into a smooth curve, reducing the stress concentration at the end part of the roll in the rolling process and reducing the edge peeling of the roll; meanwhile, the shape control is taken into consideration, and the rolling stability is ensured. The curve can be continuously processed and formed, the grinding process is simple and easy to operate, and the smooth curve can effectively prevent the roller body from colliding with a probe on the measuring arm during flaw detection, so that flaw detection in the full-length direction of the roller body can be realized, and potential defects of the roller can be timely found and eliminated.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for reducing edge peeling of a backup roll of a heavy and medium plate mill is characterized in that a roll body contour of the backup roll is processed into a smooth curve, the curve is symmetrical by taking a length center line of the roll body as a center line, each half of the roll body contour curve can be represented by a seven-power function curve, and the seven-power function curve equation is as follows:
y(x)=a 1 x 1 +a 2 x 2 +a 3 x 3 +a 4 x 4 +a 5 x 5 +a 6 x 6 +a 7 x 7 in the formula (I), wherein,
x represents the distance between the processing point and the length center line of the roller body;
y (x) represents the grinding amount of the edge of the profile of the body of the supporting roller;
a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 the equation coefficients are expressed and respectively correspond to: a is a 1 = 1.32700475×10^(-02)；a 2 = -3.26565893×10^(-05)；a 3 = 4.62833359×10^(-08)；a 4 =-4.03695526×10^(-11)；a 5 = 2.14322108×10^(-14)；a 6 = -6.34965142×10^(-18)；a 7 = 8.03622166×10^(-22)。
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the profile of the body of the supporting roll is processed into a form of a cubic curve, and a high-order term of a roll shape equation is used for realizing stress concentration of the edge part of the roll and reducing the peeling of the roll. The lower order term of the roll form equation is used for strip shape control over the rolling width. Compared with a hexagonal roll shape design, the high-order and low-order terms can be processed respectively aiming at the requirements of middle part plate shape control and edge peeling prevention due to the higher-order terms, and the problems of supporting roll plate shape control and edge peeling are solved better.
2. According to the invention, the profile curve of the roller body of the supporting roller is designed into a form of a cubic curve, so that the grinding of the supporting roller can be continuously formed, the process of respectively processing chamfers at two ends of the roller body after the roller body is integrally ground in the prior art is simplified, and the grinding process is simple and easy to operate. Meanwhile, the safety of flaw detection operation can be improved, the roller body is prevented from colliding with a probe on the measuring arm during flaw detection, full-coverage flaw detection on the surface of the roller body can be realized, potential defects of the roller can be timely found and eliminated, and edge peeling of the supporting roller is reduced.
3. The invention is applied to the 3450mm supporting roll of the steckel mill of the company, no edge peeling accident occurs, the service life of the roll is prolonged, the roll shape retention degree of the supporting roll is greatly improved, and the plate shape control capability is enhanced.
Drawings
FIG. 1 is a schematic view of a profile curve of a backup roll of the present invention;
in the figure: 1. a roll body 2 and a roll neck; 3. and (5) a roller head.
Detailed Description
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.
Example 1
The embodiment provides a method for reducing edge peeling of a backup roll of a heavy and medium plate mill, which is specifically to process the contour of a roll body 1 of the backup roll into a smooth curve, wherein the curve is symmetrical by taking a length center line of the roll body as a center line, each half of the contour curve of the roll body can be represented by a seven-degree square function curve, and the seven-degree square function curve equation is as follows:
y(x)=a 1 x 1 +a 2 x 2 +a 3 x 3 +a 4 x 4 +a 5 x 5 +a 6 x 6 +a 7 x 7 in the formula (I), wherein,
x represents the distance between the processing point and the length center line of the roller body;
y (x) represents the grinding amount of the edge of the profile of the body of the supporting roller;
a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 expressing the equation coefficients, which respectively correspond to: a is 1 = 1.32700475×10^(-02)；a 2 = -3.26565893×10^(-05)；a 3 = 4.62833359×10^(-08)；a 4 =-4.03695526×10^(-11)；a 5 = 2.14322108×10^(-14)；a 6 = -6.34965142×10^(-18)；a 7 = 8.03622166×10^(-22)。
In the embodiment, the roll neck 2 and the roll head 3 of the supporting roll adopt the specifications of the prior art, the supporting roll of the embodiment is used on the 3450mm supporting roll of the steckel mill of the company, no edge peeling accident occurs, the service life of the roll is prolonged, meanwhile, the roll shape retention of the supporting roll is greatly improved, and the plate shape control capability is enhanced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims (1)

1. A method for reducing the edge peeling of a back-up roll of a heavy and medium plate mill is characterized in that the method is specifically characterized in that the contour of the body of the back-up roll is processed into a smooth curve, the stress concentration at the end part of the roll in the rolling process is reduced, and the edge peeling of the roll is reduced; meanwhile, the shape control is taken into consideration, so that the stability of rolling is ensured; the curve enables the grinding of the supporting roller to be continuously formed; the curve is symmetrical by taking the length center line of the roller body as a center line, each half of the contour curve of the roller body is represented by a seven-degree square function curve, and the equation of the seven-degree square function curve is as follows:
y(x)=a 1 x 1 +a 2 x 2 +a 3 x 3 +a 4 x 4 +a 5 x 5 +a 6 x 6 +a 7 x 7 in the formula (I), the reaction is carried out,
x represents the distance of the processing point from the central line of the length of the roller body;
y (x) represents the grinding amount of the edge of the profile of the roller body of the supporting roller;
a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 expressing the equation coefficients, which respectively correspond to: a is 1 = 1.32700475×10^(-02)；a 2 = -3.26565893×10^(-05)；a 3 = 4.62833359×10^(-08)；a 4 =-4.03695526×10^(-11)；a 5 = 2.14322108×10^(-14)；a 6 = -6.34965142×10^(-18)；a 7 = 8.03622166×10^(-22)。
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CN113714305B (en) * 2021-07-30 2023-06-30 安阳钢铁股份有限公司 Method for improving flat plate shape defect

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208321617U (en) * 2018-06-12 2019-01-04 安阳钢铁股份有限公司 A kind of novel hot-continuous-rolling strip steel working roll
CN110732560A (en) * 2019-09-02 2020-01-31 安阳钢铁股份有限公司 novel hot continuous rolling strip steel supporting roll and manufacturing method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2044910U (en) * 1989-03-14 1989-09-27 北京科技大学 Roller
JP3786065B2 (en) * 2002-09-05 2006-06-14 石川島播磨重工業株式会社 Rolling roll and rolling mill using the same
ATE413237T1 (en) * 2004-09-14 2008-11-15 Sms Demag Ag CONVEX ROLLER TO INFLUENCE THE PROFILE AND FLATNESS OF A ROLLED STRIP
CN2917840Y (en) * 2005-10-20 2007-07-04 鞍钢新轧钢股份有限公司 Rolling mill supporting roller with complex curve roll shape
CN202061891U (en) * 2011-03-30 2011-12-07 鞍钢股份有限公司 Settled breadth machine module
CN102632081B (en) * 2012-04-06 2014-08-13 马钢(集团)控股有限公司 Hot-rolling rough mill structure
CN102716911A (en) * 2012-06-21 2012-10-10 首钢总公司 Composite supporting roll for hot-continuous rolling wide-strip-steel four-roll mill
CN104998910B (en) * 2015-08-11 2017-07-18 首钢总公司 A kind of belt steel surface orange peel shape reticulate pattern defects controlling method
CN208600463U (en) * 2018-03-27 2019-03-15 北京首钢股份有限公司 A kind of support roller of rougher of hot strip mill four-high mill

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208321617U (en) * 2018-06-12 2019-01-04 安阳钢铁股份有限公司 A kind of novel hot-continuous-rolling strip steel working roll
CN110732560A (en) * 2019-09-02 2020-01-31 安阳钢铁股份有限公司 novel hot continuous rolling strip steel supporting roll and manufacturing method thereof

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