阅读说明：本技术 用于消除连轧机支撑辊边部接触部位剥落的辊型 (Roller profile for eliminating edge contact part peeling of continuous rolling mill support roller ) 是由 韩菲 徐宏涛 林晓东 于 2019-08-27 设计创作，主要内容包括：本发明涉及一种用于消除连轧机支撑辊边部接触部位剥落的辊型,属于连轧机辊型技术领域,解决连轧机支撑辊边部剥落的技术问题。解决方案为：支撑辊的中部设置为圆柱段,圆柱段两端的端部分别设置为圆锥过渡段,圆锥过渡段的高度为90mm,设圆锥过渡段端面的圆心为坐标原点,设圆锥过渡段的纵截面圆心与对应一侧坐标原点之间的距离为x,支撑辊边部辊型的轮廓曲线y为：<Image he="42" wi="193" file="103100DEST_PATH_IMAGE002.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>,x∈[0,90]。本发明提供的一种用于消除连轧机支撑辊边部接触部位剥落的辊型,重新设计了锥度长度以及锥形,采用过渡较为平滑的正弦曲线,降低支撑辊与中间辊接触应力,有效避免支撑辊边部剥落,确保了生产正常运行的同时降低辊耗。(The invention relates to a roll profile for eliminating the peeling of the edge contact part of a tandem mill backing roll, belongs to the technical field of tandem mill roll profiles, and solves the technical problem of the peeling of the edge of the tandem mill backing roll. The solution is as follows: the middle part of backing roll sets up to the cylinder section, and the tip at cylinder section both ends sets up respectively to the circular cone changeover portion, and the height of circular cone changeover portion is 90mm, establishes the centre of a circle of circular cone changeover portion terminal surface and is the origin of coordinates, establishes the longitudinal section centre of a circle of circular cone changeover portion and corresponds the distance between the origin of coordinates of one side and be x, and the profile curve y of backing roll limit portion roller type is: x is equal to [0, 90 ]. The invention provides a roll profile for eliminating the peeling of the edge contact part of a continuous rolling mill support roll, redesigns the taper length and the taper, adopts a sine curve with smooth transition, reduces the contact stress of the support roll and a middle roll, effectively avoids the peeling of the edge of the support roll, ensures the normal operation of production and simultaneously reduces the roll consumption.)

1. the roll profile for eliminating the peeling of the edge part contact part of the continuous rolling mill supporting roll is characterized in that:

the middle part of backing roll sets up to the cylinder section, and the tip at cylinder section both ends sets up respectively to the circular cone changeover portion, and the height of circular cone changeover portion is 90mm, establishes the centre of a circle of circular cone changeover portion terminal surface as the origin of coordinates, and the distance of establishing the longitudinal section centre of a circle of circular cone changeover portion and corresponding one side origin of coordinates is x, and the profile curve of backing roll limit portion roller type is:

，x∈[0，90]。

Technical Field

The invention belongs to the technical field of continuous mill roll shapes, and particularly relates to a roll shape for eliminating the peeling of the edge contact part of a continuous mill supporting roll.

Background

The 1450 silicon steel acid rolling mill set tandem mill section manufactured by Mitsubishi Hitachi design is formed by connecting five-frame six-roller mills in series, and the rollers of the six-roller mill set comprise working rollers, intermediate rollers and supporting rollers. After the production, in the normal use process, the edge part of the supporting roll is frequently peeled off, the supporting roll needs to be taken off in advance before the roll changing period, and the roll consumption is high.

The lengths of the roll surfaces of a supporting roll, an intermediate roll and a working roll of the five-rack six-roll mill are 1420mm, 1450mm and 1605mm respectively, the intermediate roll has roll bending and roll shifting functions due to the control requirements of edge drop, plate shape and the like of a silicon steel product, so that the contact position of the supporting roll and the edge of the intermediate roll is subjected to larger shearing force and transverse force, the supporting roll is provided with a chamfer with the taper length of 40mm being 5 degrees, and the harmful contact of the edge of the intermediate roll to the supporting roll is reduced.

In the rolling process, the position of the intermediate roll is constantly changed according to the width of the strip steel and the roll shifting value, the position of the supporting roll is unchanged, and the distance delta L between the intermediate roll and the edge of the supporting roll can be represented by the following formula:

ΔL=L/2-(W/2+50+UC-D)

In the formula: delta L is the position of the middle roller edge relative to the edge of the supporting roller; l is the length of the roller surface of the supporting roller; w is the width of the strip steel (1020 mm-1280 mm); UC-D is the roll shifting value of the intermediate roll (the roll shifting value is larger when the strip steel is narrower by 10-50).

the range of delta L can be obtained to be 0-100 according to the rolled products of the unit and the technological parameters, wherein the narrower the strip steel, the larger the delta L is, and according to calculation, when the width of the strip steel is smaller than 1180mm, the delta L is larger than 40mm and exceeds the protection range of the supporting roller, so that the harmful contact to the supporting roller cannot be eliminated.

according to the structural analysis of rolled products of the unit, harmful contact of nearly 45% of the products to the supporting roller in the rolling process cannot be eliminated, and stress concentration is easily caused in a straight chamfer transition area due to the roller taper, so that edge peeling is caused.

Disclosure of Invention

The purpose of the invention is: in order to reduce the contact stress of the edge contact part of the continuous rolling mill supporting roller, eliminate the edge peeling of the supporting roller and ensure the stable operation of production, the invention provides a roller shape for eliminating the edge peeling of the edge contact part of the continuous rolling mill supporting roller.

The invention is realized by the following technical scheme.

A roll profile for eliminating the peeling of the edge contact part of the back-up roll of a continuous rolling mill, wherein: the middle part of backing roll sets up to the cylinder section, and the tip at cylinder section both ends sets up respectively to the circular cone changeover portion, and the height of circular cone changeover portion is 90mm, establishes the centre of a circle of circular cone changeover portion terminal surface as the origin of coordinates, and the distance of establishing the longitudinal section centre of a circle of circular cone changeover portion and corresponding one side origin of coordinates is x, and the profile curve y of backing roll limit portion roller type is: x is equal to [0, 90 ].

compared with the prior art, the invention has the beneficial effects that:

according to the invention, the taper length and the taper are redesigned according to the roll shifting position of the middle roll, and the edge harmful contact is effectively reduced by adopting a sine curve with smooth transition. The newly designed roller type effectively reduces the contact stress between the edge of the supporting roller and the intermediate roller, the edge of the supporting roller is not peeled off after the new roller type is put into use, and the roller changing period of the supporting roller is improved from 8 ten thousand tons to 10 ten thousand tons.

Drawings

FIG. 1 is a schematic diagram of an overall roll shape structure, wherein y is a modified roll shape and y1 is a roll shape before modification;

Fig. 2 is a partially enlarged structural view of an edge roll profile of a support roll, in which a sectional line portion is a harmful contact portion, a solid line is a roll profile after improvement, and a dotted line is a roll profile before improvement.

Detailed Description

the invention is described in further detail below with reference to the figures and examples.

A roll profile for eliminating edge contact portion peeling of a back-up roll of a continuous rolling mill as shown in fig. 1 and 2, wherein: the middle part of backing roll sets up to the cylinder section, and the tip at cylinder section both ends sets up respectively to the circular cone changeover portion, and the height of circular cone changeover portion is 90mm, establishes the centre of a circle of circular cone changeover portion terminal surface as the origin of coordinates, and the distance of establishing the longitudinal section centre of a circle of circular cone changeover portion and corresponding one side origin of coordinates is x, and the profile curve y of backing roll limit portion roller type is: x is equal to [0, 90 ].

As shown in fig. 1:

1. Original roll shape: y1 taper 3 degree, taper length 40 mm.

2. The new roller type: the contour curve y of the edge roller shape of the supporting roller is as follows: x ∈ [0, 90 ];

When x is 0, = -1.8 mm;

when x is 45, = -0.528 mm;

When x is 90, = 0 mm.

The improved roller profile reduces the contact stress of the edge of the supporting roller, effectively eliminates the edge peeling phenomenon of the supporting roller, and does not generate the edge peeling phenomenon after the newly designed roller profile is put into use.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.