CN201702167U - Hot mill roller roll shape with high holding force - Google Patents

Abstract

The utility model relates to a hot mill roller, in particular to a roll shape of a hot rolled strip steel roller. The technical scheme is that the hot mill roller roll shape with the high holding force is a sinusoid curve roll shape and accords with the function as shown in the specification, wherein alpha is an angle, l is roll surface length, and c is degree of convexity and is less than zero. The roll shape has enough holding force and ensures a straight intermediate billet.

Description

A kind of hot-rolling mill roll profile with high chucking power

Technical field

The utility model relates to the hot-rolling mill roll, relates in particular to a kind of roll shape of hot-strip roll.

Background technology

On modern hot-rolled strip production line, the general pony roughing mill of arranging has 1 to several, is used to compress the thickness of continuous casting billet, and the intermediate blank of good profile is provided for finishing stand.But in the operation of rolling, the difference that the both sides roll gap of horizontal roll exists or the play at random of horizontal roll all can cause the operation of intermediate blank lateral bending.In order to control the lateral bending of intermediate blank, usually there are two kinds of methods to select, first kind is the outside effect of selecting when the intermediate blank rolling deformation, for example design the automatic Side Bend Control system of milling train, this system promptly measures the roll-force difference of transmission side and fore side and judges the lateral bending method by the lateral bending of strip lateral displacement sensor detection intermediate blank.Automatically the Side Bend Control system adopts a kind of FEEDBACK CONTROL, adopts to reduce the roll gap that roll-force increases by a side, and making recessed side extend increases, thereby guarantees straight intermediate blank.Second kind is the inner effect of selecting when the intermediate blank rolling deformation, for example designs the roll shape of roll, makes roll shape possess enough chucking powers, guarantees straight intermediate blank.

In roll design, plain-barreled roll is generally arranged, protruding roller, three kinds of roll shapes such as recessed roller, from the quality of three kinds of roll shapes of rolling stability aspect investigation, apparent recessed roller is better than plain-barreled roll, plain-barreled roll is better than protruding roller.

Original roller type is that the rolling deformation district cross section state of recessed roller is the circular arc of symmetrical indent, and this recessed roller is symmetrical structure, by the clamping action to intermediate blank, makes the straight operation of the rolling center line of intermediate blank.

Summary of the invention

The utility model is intended to address the above problem, and a kind of hot-rolling mill roll profile with high chucking power is provided.The utility model roll shape possesses enough chucking powers, guarantees straight intermediate blank.

The utility model is achieved in that

A kind of hot-rolling mill roll profile with high chucking power, it is sinusoidal roll shape, it is characterized in that: described roll profile meets array function down:

$y=\frac{c}{1-\cos \mathrm{\α}}(\cos \frac{\mathrm{\αx}}{l}-\cos \mathrm{\α})$

Wherein: α-angle

L-roll surface length

C-convexity and less than zero, general convexity span is (0,0.3).

Described hot-rolling mill roll profile with high chucking power, described chucking power is meant that roll has clamping action to intermediate blank in the operation of rolling, the numerical value of chucking power is proportional with the slope of described function curve, therefore, expresses the chucking power P of roll shape with the tangent slope K of curve.

The utility model utilizes the original roller type structure of roll: the parameter of convexity, barrel length is tried to achieve suitable roll shape by function curve, thereby guarantees that roll possesses enough chucking powers, guarantees straight intermediate blank.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and embodiments:

Fig. 1 is the utility model roll shape function curve schematic diagram;

Fig. 2 is a described SIN function family of curves schematic diagram;

Fig. 3 is described chucking power trend curve figure.

The specific embodiment

A kind of hot-rolling mill roll profile with high chucking power, it is sinusoidal roll shape, it is characterized in that: described roll profile meets array function down:

$y=\frac{c}{1-\cos \mathrm{\α}}(\cos \frac{\mathrm{\αx}}{l}-\cos \mathrm{\α})$

Wherein: α-angle

L-roll surface length

C-convexity and less than zero, general convexity span is (0,0.3).

Described hot-rolling mill roll profile with high chucking power, described chucking power is meant that roll has clamping action to intermediate blank in the operation of rolling, the numerical value of chucking power is proportional with the slope of described function curve, therefore, expresses the chucking power P of roll shape with the tangent slope K of curve.

As shown in Figure 2, be respectively 90 degree, 180 degree, 270 degree and four sine curves of 360 degree with angle and describe family of curves, convexity is-0.09 millimeter, and the barrel length of right half part is 890 millimeters.

In hot-rolled sheet strip steel is produced, be the strip width of 1050 millimeters and 1250 millimeters for typical width specifications, correspondence is exactly 525 millimeters of barrel lengths and 625 millimeters in Fig. 2, because suitable smooth of the sine curve of the body of roll, so the employing approximate calculation method.Choose in the curve straight line of 2 A and B and replace the tangent slope that B is ordered, A and B two point coordinates are respectively:

A(0，-0.09)，B?1(525，yi)，B2(625，yi)

The calculating of clamping rate:

Result of calculation such as table one,

Table one: sine curve family slope value

a	π/2	π	3π/2	2π
					K1	6.17E-05	6.85E-05	8.24E-05	0.00011
K2	7.29E-05	7.91E-05	9.14E-05	0.000115

Slope in the apparent table is along with the increase of angle, and slope of a curve increases synchronously, if be benchmark with the a=pi/2, then the percentage that increases successively of other several slope of a curves is respectively 10,25,55.

According to the tables of data of table one, form Trendline such as Fig. 3 of chucking power

In design when sinusoidal, the angle value that correspondence is chosen just obtains the clamping rate score that intermediate blank is 1050 millimeters and 1250 millimeters very easily.During sinusoidal here span (0～2 π), the width of the numerical value intermediate blank of clamping rate, three independents variable of convexity and angle are determined.

Field case: the intrinsic plain-barreled roll a=0 of roughing working roller degree roll shape, intermediate blank sideslip accident often takes place.Be improved to the sine curve roll shape (a=pi/2) of negative convexity when original roller type after, intermediate blank sideslip accident has been lacked, and the phenomenon of intermediate blank lateral bending is just arranged in rolling narrow width.So when the angle of sine curve roll shape was optimized to the a=3 pi/2, the phenomenon of intermediate blank lateral bending had also been eliminated, follow slope to increase after just the angle of curve increases to be the chucking power of intermediate blank to increase, it is straight that plate shape just becomes.

Claims (2)

1. hot-rolling mill roll profile with high chucking power, it is sinusoidal roll shape, it is characterized in that: described roll profile meets array function down:

$y=\frac{c}{1-\cos \mathrm{\α}}(\cos \frac{\mathrm{\αx}}{l}-\cos \mathrm{\α})$

Wherein: α-angle

L-roll surface length

C-convexity and less than zero, the convexity span is (0 ,-0.3).

2. according to the described hot-rolling mill roll profile of claim 1 with high chucking power, it is characterized in that, described chucking power is meant that roll has clamping action to intermediate blank in the operation of rolling, the numerical value of chucking power is proportional with the slope of described function curve, therefore, express the chucking power P of roll shape with the tangent slope K of curve.

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