CN101758080B - Strip-rolling variable contact support roller and processing method thereof - Google Patents

Abstract

The invention relates to a variable contact support roll for rolling a plate and a strip and a processing method thereof. The roll shape curve is superimposed by five-segment sine functions, which can make the length of the contact line between the backup roll and the work roll similar to the width of the rolled strip, reduce the harmful contact area during the rolling process, and improve the control effect of the bending force , to increase the lateral stiffness of the roll gap, and at the same time, it can evenly contact the pressure between the rolls, and reduce or eliminate the occurrence of peeling accidents at the edge of the support roll. In the grinding process of the roll shape, the superimposed roll shape of the variable contact section and the chamfer section on both sides are firstly ground, and then the whole roll body is ground to achieve the purpose of improving the processing efficiency and reducing the consumption of the grinding wheel. The roll shape design and processing of the backup roll of the invention are convenient, and industrial application is easy to realize.

Description

A kind of plate sheet and strip variable contact support roller and processing method thereof

Technical field

The present invention relates to a kind ofly, belong to the roll forming design in the board rolling field with being used for plate shape control in the steel production and can reducing the support roller roll forming and the processing method thereof of roller consumption.

Background technology

At the initial support roller roll forming of using of strip production field is conventional convexity roller or plain-barreled roll, because conventional roll forming does not possess plate shape control ability, and support roller takes place easily peel off accident, so replaced by variable contact support roller roll forming and limit portion circular arc chamfering support roller roll forming gradually.

(1) variable contact support roller roll forming

For solving support roller uneven wear problem, improve the plate shape control ability of support roller simultaneously, patent 1 (ZL91229974.6,1993.12.22), document 1 (Chen Xianlin, Yang Quan, Zhang Qingdong, et al.Varying contact back-up roll for improved strip flatness.Steel Technology International, Sterling Publications Limited.London.1994/1995 (yearly): 174), document 2 (Chen Xianlin, Zhang Jie, Zhang Qingdong, Deng. the exploitation of wide steel strip hot continuous mill plat control system. iron and steel, 2000,35 (7): 28), document 3 (He Anrui, Cao Jianguo, Wu Qinghai, etc. the research of hot fine rolling unit variable contact support roller combination property. Shanghai metal, 2001,23 (1): proposed variable contact support roller VCR (Varying Contact Backup Roll) roll shape curve 14), as shown in Figure 1.This curve is by the high-order moment function representation, production practices through the more than ten years, many steel sheet production lines have been obtained extraordinary effect at home, can obviously reduce the harmful contact zone in the operation of rolling, improve the regulation and control effect of bending roller force, increase the roll gap lateral stiffness, evenly roller presses power indirectly simultaneously, reduce or stop the generation that accident is peeled off in support roller limit portion, we can say the double effects that has had both the control of plate shape and reduced the roller consumption.But there is the big problem of difficulty of processing in the integrated curved that the high-order moment function generates, needs to adopt as shown in Figure 2 " approximate grinding method " constantly to approach on general-purpose grinder; On high precision numerical control grinding machine now, though can make things convenient for typing higher order functionality curve, the line number of going forward side by side control grinding, but because roll shape curve total length slope variation amplitude is bigger, especially the both sides difficulty of processing is big, emery wheel wants reciprocal multiple-pass grinding can form final roll forming in process, has situation about wasting time and energy, and is almost 2-3 times of conventional roll forming process time.

(3) limit portion circular arc chamfering support roller roll forming

The CVC milling train of German western mark company (SMS) that China introduces in recent years adopts the support roller roll forming of limit portion circular arc chamfering as shown in Figure 3 more, and the roll shape curve middle part is a plain-barreled roll, and limit portion is by the stack of two sections circular arc chamferings, to improve support roller limit portion force-bearing situation.This roll forming not only can be applicable to the CVC milling train, also can be used with conventional convexity working roll, has embodied the thought that the plain-barreled roll roll forming carries out limit portion chamfering.

Two sections circular arcs that this roll forming adopts and horizontal linear is tangent are superimposed in starting point and former roll shape curve, for each section circular arc, by starting point that changes chamfering or the size that arc radius can change the chamfering degree of depth, its degree of depth h ' and chamfering length l ' and radius r ' relation (as shown in Figure 4) can be expressed as:

$h^{\′}=r^{\′}-\sqrt{r^{\′2}-l^{\′2}},r^{\′}>l^{\′}$

H ' in the formula: the support roller chamfering degree of depth;

R ': support roller chamfer radius;

L ': support roller chamfering length.

As seen, increase l ' and reduce the effect that r ' all can play the intensification chamfering.But, this roll forming after l ' and h ' are fixing, radius r ' promptly definite, and then the chamfering form is also definite, can not carry out the roll forming adjustment according to contact situation between roller.

Summary of the invention

The purpose of this invention is to provide a kind of new variable contact support roller roll forming, this roll forming at first has the thought that becomes contact, can be so that the contact line length of support roller and working roll be close with the rolled band steel width, reduce the harmful contact zone in the operation of rolling, improve the regulation and control effect of bending roller force, increase the roll gap lateral stiffness, evenly roller presses power indirectly, reduce or stop the generation that accident is peeled off in support roller limit portion, thereby reduce support roller roller consumption; Secondly, this roll forming passes through at first to distinguish the stack roll forming that the grinding both sides become contact-segment and chamfering section in grinding process, carry out the processing mode of full body of roll grinding then, can shorten the Roller Machining time greatly, reach the purpose that improves working (machining) efficiency, reduces emery wheel consumption.Support roller roll forming design of the present invention, easy to process is easy to realize commercial Application.

A kind of plate sheet and strip variable contact support roller is characterized in that with support roller body of roll mid point be the origin of coordinates, and roll shape curve is formed by stacking by five sections sine curves shown in Figure 5, comprising:

The AF section, promptly

$R\left(x\right)=k[\sin (\frac{\mathrm{x\θ}}{L}\frac{\mathrm{\π}}{90}+\frac{\mathrm{\π}}{2})-1]$

X in the formula: body of roll coordinate, unit are mm;

L: the support roller barrel length, unit is mm;

K: support roller roll forming adjustment factor, span are 0.01～1000mm;

θ: support roller roll forming shape adjustment angle, span is 0～90 °;

The AC section, promptly

$R\left(x\right)=k_1[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

L in the formula ₁: the one-sided change contact-segment of support roller length, span is

Unit is mm;

k ₁: support roller roll forming adjustment factor, span are 0.1～6000mm;

θ ₁: support roller roll forming shape adjustment angle, span is 0～90 °;

The AB section, promptly

$R\left(x\right)=k_2[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

L in the formula ₂: the one-sided chamfering segment length of support roller, span is 0～L ₁, unit is mm;

k ₂: support roller roll forming adjustment factor, span are 0.5～10000mm;

θ ₂: support roller roll forming shape adjustment angle, span is 0～90 °;

The DF section, promptly

$R\left(x\right)=k_1[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

The EF section, promptly

$R\left(x\right)=k_2[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

In the roll shape curve design process, body of roll total length AF section is symmetrical in body of roll mid point, carries out supporting design according to shape of working roll, and evenly roller presses power indirectly; AC section and DF section are about point-symmetric two sections curves in the body of roll, can change the contact line length of working roll and support roller by rational roll forming design, make it to be close, thereby improve plate shape ability of regulation and control, and further even roller presses power indirectly with the rolled band steel width; AB section and EF section are similarly about point-symmetric two sections curves in the body of roll, mainly play the chamfering effect of limit portion, avoid occurring " pressing shoulder ".

In the process of roll shape curve, process the stack roll forming of the change contact-segment and the chamfering section of support roller both sides at first respectively:

Roll shape curve after AC and the AB stack is:

When $-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}\&le;x\&le;-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2$

$R\left(x\right)=k_2\left[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k_1\right[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

When $-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\&le;x\&le;-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1$

$R\left(x\right)=k_1[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

Roll shape curve after DF and the EF stack is:

When $\frac{L}{2}-{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1\&le;x\&le;\frac{L}{2}-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2$

$R\left(x\right)=k_1[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

When $\frac{L}{2}-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\&le;x\&le;\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}$

$R\left(x\right)=k_2\left[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k_1\right[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

Carry out the integral body processing of full body of roll roll shape curve then, full body of roll roll shape curve is:

When $-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}\&le;x\&le;-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2$

$R\left(x\right)=k_2\left[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k_1\right[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

$+k[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

When $-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\&le;x\&le;-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1$

$R\left(x\right)=k_1\left[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k\right[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

When $-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1\&le;x\&le;\frac{L}{2}-{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1$

$R\left(x\right)=k[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

When $\frac{L}{2}-{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1\&le;x\&le;\frac{L}{2}-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2$

$R\left(x\right)=k_1\left[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k\right[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

When $\frac{L}{2}-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\&le;x\&le;\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}$

$R\left(x\right)=k_2\left[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]+k_1\right[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

$+k[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

Full body of roll curve quinquepartite is at four points of connection

The place, the slope of roll forming function is respectively:

$R^{\&prime;}(-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+L_2)=\frac{{\mathrm{<figure-callout\; id="1"\; label="k"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">k</figure-callout>}}_1{\mathrm{\&theta;}}_1\mathrm{\&pi;}}{180{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}\cos (\frac{L_2-{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{180{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})+\frac{\mathrm{k\&theta;\&pi;}}{90L}\cos (\frac{(2L_2-L)\mathrm{\&theta;\&pi;}}{180L}+\frac{\mathrm{\&pi;}}{2})$

$R^{\&prime;}(-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+L_1)=\frac{\mathrm{k\&theta;\&pi;}}{90L}\cos [\frac{({2L}_1-L)\mathrm{\&theta;\&pi;}}{180L}+\frac{\mathrm{\&pi;}}{2}]$

$R^{\&prime;}(\frac{L}{2}-L_1)=\frac{\mathrm{k\&theta;\&pi;}}{90L}\cos [\frac{(L-2L_1)\mathrm{\&theta;\&pi;}}{180L}+\frac{\mathrm{\&pi;}}{2}]$

$R^{\&prime;}(\frac{L}{2}-L_2)=\frac{{\mathrm{<figure-callout\; id="1"\; label="k"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">k</figure-callout>}}_1{\mathrm{\&theta;}}_1\mathrm{\&pi;}}{180{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}\cos (\frac{L_1-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{180{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})+\frac{\mathrm{k\&theta;\&pi;}}{90L}\sin \left[\frac{(L-{2L}_2)\mathrm{\&theta;\&pi;}}{180L}+\frac{\mathrm{\&pi;}}{2}\right]$

The slope of curve does not have jump and occurs, and full body of roll curve five parts are for seamlessly transitting.

Advantage of the present invention

The present invention has developed a kind of new variable contact support roller roll forming on the basis of the existing plate sheet and strip of catapepsis with the support roller roll forming, its advantage mainly contains:

(1) this roll forming has had the advanced idea that the VCR support roller " becomes contact "

Compare with conventional roll forming, can make the contact line length of support roller and working roll close with the rolled band steel width, reduce the harmful contact zone in the operation of rolling, improve the regulation and control effect of bending roller force, increase the roll gap lateral stiffness, evenly roller presses power indirectly, reduces or stops the generation that accident is peeled off in support roller limit portion.

(2) make things convenient for grinding, improved grinding speed, reduced emery wheel consumption

Compare with the whole support roller roll forming of high-order moment design, this roll forming needn't adopt " approximate grinding method " or multiple-pass processing, but behind the sinusoidal roll forming after the difference grinding both sides stack (roll forming after roll forming after being AB and AC stack and DF and the EF stack), carry out the grinding of whole roll shape curve, can improve grinding efficiency greatly, reduce emery wheel consumption.

(3) flexible design is convenient

This roll forming AF section sine curve can be adjusted flexibly according to the shape of working roll convexity, to improve contact situation between roller; Limit portion becomes contact-segment in design process, can length l ' and degree of depth h ' fixing after, by changing roll forming adjustment factor θ ' change sinusoidal form, as shown in Figure 6; Limit portion chamfering section can be adjusted flexibly according to actual roll working condition, and general chamfering segment length is 50-100mm, and the degree of depth is 0.5-1.5mm.

(4) be widely used

This roll forming can be applicable to conventional four/six rollers cold/hot-rolling mill, WRS milling train, PC milling train, HC milling train and the lighter upstream frame of CVC milling train support roller uneven wear degree.

Description of drawings

Fig. 1 is a VCR support roller roll shape curve

Fig. 2 is VCR support roller " an approximate grinding method ";

Fig. 3 is a SMS support roller roll shape curve;

Fig. 4 is a SMS support roller roll shape curve circular arc chamfering physical dimension graph of a relation;

Fig. 5 is a support roller roll shape curve of the present invention;

Fig. 6 is the support roller sine curve of the present invention under the different roll forming adjustment factor θ ';

Fig. 7 is for selecting the support roller roll shape curve of the present invention of differential roller shape parameter;

Fig. 8 is support roller roll shape curve of the present invention and the contrast of other roll shape curves;

Fig. 9 is that support roller roll shape curve of the present invention and other roll forming rollers press the power contrast indirectly;

Figure 10 is that support roller of the present invention becomes contact-segment and chamfering section grinding machine typing schematic diagram;

Figure 11 is the grinding roll forming after limit of the present invention portion's change contact-segment and the stack of chamfering section;

Figure 12 is a support roller AF section grinding machine typing schematic diagram of the present invention.

The specific embodiment

A kind of variable contact support roller roll forming makes the contact length of support roller and working roll close with the rolled band steel width, reduces the harmful contact zone in the operation of rolling, improve the regulation and control effect of bending roller force, increase the roll gap lateral stiffness, evenly roller presses power indirectly simultaneously, and is easy to design and processing.

The support roller roll shape curve is formed by stacking by five sections sine curves, comprising:

The AF section, promptly

$R\left(x\right)=k[\sin (\frac{\mathrm{x\&theta;}}{L}\frac{\mathrm{\&pi;}}{90}+\frac{\mathrm{\&pi;}}{2})-1]$

The AC section, promptly

$R\left(x\right)=k_1[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

The AB section, promptly

$R\left(x\right)=k_2[\sin (\frac{2x+L-2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

The DF section, promptly

$R\left(x\right)=k_1[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{360{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}{\mathrm{\&theta;}}_1\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

The EF section, promptly

$R\left(x\right)=k_2[\sin (\frac{2x-L+2{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{360{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">L</figure-callout>}}_2}{\mathrm{\&theta;}}_2\mathrm{\&pi;}+\frac{\mathrm{\&pi;}}{2})-1]$

Wherein, body of roll total length AF section is symmetrical in body of roll mid point.When θ=0, roll forming is a plain-barreled roll, and this moment, the selection of coefficient k lost meaning; When 1 °≤θ≤90 °, body of roll curve middle part is the convexity roller.Under the situation that θ determines, can adjust curve convex value C by coefficient k, the pass between them is:

$C=-k[\sin (-\frac{\mathrm{\&theta;\&pi;}}{180}+\frac{\mathrm{\&pi;}}{2})-1]$

When θ=90 °,

By curve convexity C ∈ [0.01mm, 0.15mm], draw k ∈ [0.01,0.15]; When θ=1 °, By curve convexity C ∈ [0.01mm, 0.15mm], draw k ∈ [66.67,1000]; When θ got other values, the span of k should be between 0.01 and 1000.

AC section and DF section are about point-symmetric two sections curves in the body of roll, have the regulation and control effect that becomes contact.Work as θ ₁=0 o'clock, the change contact-segment was plain-barreled roll; As 1 °≤θ ₁In the time of≤90 °, the change contact-segment is curve, and can be by adjusting θ ₁Size, adjust the shape (as shown in Figure 6) of curve.At θ ₁After determining, pass through coefficient k ₁Adjust curve degree of depth h ₁, the pass between them is:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="H2010100337816E00023.png,H2010100337816E00032.png"\; state="\{\{state\}\}">h</figure-callout>}}_1=-k_1[\sin (-\frac{{\mathrm{\&theta;}}_1\mathrm{\&pi;}}{180}+\frac{\mathrm{\&pi;}}{2})-1]$

Work as θ ₁In the time of=90 °,

By curve degree of depth h ₁∈ [0.1mm, 0.9mm] draws k ₁∈ [0.1,0.9]; Work as θ ₁In the time of=1 °,

By curve degree of depth h ₁∈ [0.1mm, 0.9mm] draws k ₁∈ [666.67,6000]; Work as θ ₁When getting other values, k ₁Span between 0.1 and 6000.

AB section and EF section are similarly about point-symmetric two sections curves in the body of roll, mainly play the chamfering effect of limit portion.Work as θ ₂=0 o'clock, the chamfering section was a plain-barreled roll; As 1 °≤θ ₂In the time of≤90 °, the chamfering section is a curve, and can be by adjusting θ ₂Size, adjust the shape (as shown in Figure 6) of chamfering.At θ ₂After determining, pass through coefficient k ₂Adjust chamfering degree of depth h ₂, the pass between them is:

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="H2010100337816E00031.png"\; state="\{\{state\}\}">h</figure-callout>}}_2=-k_2[\sin (-\frac{{\mathrm{\&theta;}}_2\mathrm{\&pi;}}{180}+\frac{\mathrm{\&pi;}}{2})-1]$

Work as θ ₂In the time of=90 °, By chamfering degree of depth h ₂∈ [0.5mm, 1.5mm] draws k ₂∈ [0.5,1.5]; Work as θ ₂In the time of=1 °,

By chamfering degree of depth h ₂∈ [0.5mm, 1.5mm] draws k ₂∈ [3333.33,10000]; Work as θ ₂When getting other values, k ₂Span between 0.5 and 10000.

Be elaborated with specific embodiment below.

Embodiment one:

Design roll shape curve shown in roll forming among Fig. 71 with the coefficient that table 1 is selected, as can be seen, when all roll forming shape angle got 0, roll forming was conventional plain-barreled roll.

Table 1

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Roll forming 1	1800	0	---	350	0	---	100	0	---

Embodiment two:

Design roll shape curve shown in roll forming among Fig. 72 with the coefficient that table 2 is selected, as can be seen, roll forming has tangible change contact performance, because shape angle is selected less and the roll forming adjustment factor has all been selected maximum, so roll shape curve becomes contact-segment and the chamfering section degree of depth is all bigger, poor having reached more than the 2.5mm in roll forming big roller footpath, this roll forming generally is applicable to the occasion that roll-force is bigger.

Table 2

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Roll forming 2	1800	1	1000	350	1	6000	100	1	10000

Embodiment three:

Design roll shape curve shown in roll forming among Fig. 73 with the coefficient that table 3 is selected, as can be seen, roll forming has the change contact performance, and big roller footpath is poor about 1.4mm, generally is applicable to hot-rolling mill upstream frame.

Table 3

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Roll forming 3	1800	30	0.15	350	30	4	100	30	6

Embodiment four:

Design roll shape curve shown in roll forming among Fig. 74 with the coefficient that table 4 is selected, as can be seen, roll forming has the change contact performance, and big roller footpath is poor about 1mm, generally is applicable to hot-rolling mill downstream frame.

Table 4

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Roll forming 4	1800	60	0.1	350	60	0.5	100	60	1.5

Embodiment five:

Design roll shape curve shown in roll forming among Fig. 75 with the coefficient that table 5 is selected, as can be seen, roll forming has the change contact performance, and big roller footpath is poor about 0.6mm, generally is applicable to the occasion that roll-force is less.

Table 5

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Roll forming 5	1800	90	0.01	350	90	0.1	100	90	0.5

Embodiment six:

By embodiment one～embodiment five as can be seen, when all roll forming shape angle got 0, roll forming was conventional plain-barreled roll; When shape angle was non-vanishing, roll forming promptly had the change contact performance, and just the roll forming shape is different.Different roll formings should be applicable to different milling train (cooperating different shape of working roll and different roll-force situations), and to a certain cover milling train, the specific design principle of this roll forming is:

(1) reduces harmful contact zone

Contact line length between working roll and the support roller is called harmful contact zone greater than the part of strip width, and the size of harmful contact zone has bigger influence for the plate shape ability of regulation and control of milling train.First target of roll forming design is for reducing harmful contact zone, and promptly for a plurality of typical strip widths, the contact line length between working roll and the support roller is all greater than strip width, and contact length minimum between total roller, is formulated as:

${T\arg \mathrm{et}}_1=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{d}_i(L_{\mathrm{ci}}-B_i)\&RightArrow;\min$

D in the formula _i: width is B _iThe shared ratio of band steel;

L _Ci: contact length between the roller under the i kind operating mode, mm;

B _i: the strip width under the i kind operating mode, mm;

N: operating mode number, i.e. representative width band steel species number.

(2) thought of contact homogenising between roller

Influencing the topmost factor that support roller is worn and torn and roll surface peels off is that roller presses power indirectly.Roller presses the power peak value indirectly have been reduced, and it is also more even that roller presses power indirectly, so second target of roll forming design is formulated as for reducing the ratio that roller presses power peak value and its mean value indirectly:

${T\arg \mathrm{et}}_2=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{d}_i\frac{F_{i\max }}{F_{\mathrm{iavg}}}\&RightArrow;\min$

D in the formula _i: the ratio that i kind operating mode is shared;

F _Imax: the roller under the i kind operating mode presses the power peak value indirectly, Pa;

F _Iavg: the roller under the i kind operating mode presses power mean value indirectly, Pa;

N: operating mode number.

When working roll is barrel length 2000mm, the radius convexity recessed roller for-40 μ m, and during corresponding support roller barrel length L=1800mm, it is as shown in table 6 to draw the support roller relevant parameter according to this design principle optimization.

Table 6

Coefficient	L/mm	θ/°	k/mm	L 1/mm	θ 1/°	k 1/mm	L 2/mm	θ 2/°	k 2/mm
										Numerical value	1800	72	0.0724	350	5	105	100	80	0.666

As shown in Figure 5, this roll forming is to be formed by stacking by five sections curves.The contrast of this roll forming and conventional support roller, high-order moment VCR support roller and limit portion circular arc chamfering support roller as shown in Figure 8.As can be seen, at body of roll middle part 1600mm, this roll forming and high-order moment VCR support roller are very approaching, therefore, control of slave plate shape and even roller press the power aspect indirectly, have identical effect with high-order moment VCR support roller, can effectively improve the plate shape control ability of milling train and reduce support roller roller consumption; At portion 100mm place, body of roll limit, this roll forming chamfering degree of depth can more effectively be avoided " pressing shoulder " greater than high-order moment VCR support roller.

With rolling 1200mm band steel is that example is carried out the finite element simulation analysis, the result shows, variable contact support roller roll forming relative edge portion's circular arc chamfering support roller roll forming plate shape ability of regulation and control raising of the present invention is also not obvious, but compare with conventional support roller roll forming, variable contact support roller roll forming bending roller force ability of regulation and control of the present invention can increase 13.4%, and rigidity can increase 17.8%; Press power indirectly from roller and distribute (as shown in Figure 9), it is more even that roll forming roller of the present invention presses the power distribution indirectly, and this advantage will be more obvious with working roll military service later stage performance after applying bending roller force.

Roll forming of the present invention is when grinding, at first, the grinding both sides become the stack roll forming of contact-segment and chamfering section respectively, with the right side roll forming is example, and with semisinusoidal functional form difference typing DF section curve and EF section curve, input method as shown in figure 10, input body of roll starting point coordinate, roll forming height, shape adjustment angle get final product, the two sections needed limit of the automatic stack formation of SIN functions meeting portion curve forms as shown in figure 11, and are once finished grinding; After the grinding of finishing the both sides curve respectively, body of roll total length AF section is superposeed with (as shown in figure 12) in the full SIN function form typing numerically control grinder and with the both sides SIN function, form full body of roll roll forming (as shown in Figure 5) and carry out full body of roll grinding.

Claims (2)

1. a plate sheet and strip variable contact support roller is characterized in that with support roller body of roll mid point be the origin of coordinates, and roll shape curve is formed by stacking by five sections SIN functions, comprising:

The AF section, promptly

X in the formula: body of roll coordinate, unit are mm;

L: the support roller barrel length, unit is mm;

K: support roller roll forming adjustment factor, span are 0.01～1000mm;

θ: support roller roll forming shape adjustment angle, span is 0～90 °;

The AC section, promptly

L in the formula ₁: the one-sided change contact-segment of support roller length, span is

Unit is mm;

k ₁: support roller roll forming adjustment factor, span are 0.1～6000mm;

θ ₁: support roller roll forming shape adjustment angle, span is 0～90 °;

The AB section, promptly

L in the formula ₂: the one-sided chamfering segment length of support roller, span is 0～L ₁, unit is mm;

k ₂: support roller roll forming adjustment factor, span are 0.5～10000mm;

θ ₂: support roller roll forming shape adjustment angle, span is 0～90 °;

The DF section, promptly

The EF section, promptly

。

2. one kind is carried out method for processing to the described support roller roll forming of claim 1, it is characterized in that processing at first respectively the stack roll forming of the change contact-segment and the chamfering section of support roller both sides:

Roll shape curve after AC and the AB stack is:

When

When

Roll shape curve after DF and the EF stack is:

When

When

Carry out the integral body processing of full body of roll roll shape curve then, full body of roll roll shape curve is:

When

When

When

When

When

。

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