CN201267826Y - Steekle mill backing roll - Google Patents

Abstract

The utility model relates to a support roller, in particular to a support roller for a steckel mill, which adopts a curved roller form. Adopting the curved roller form, the utility model can effectively resolves problems such as unreasonable contact pressure distribution, ununiform roller abrasion and partial roller spalling. The utility model ensures that the contact pressure distribution between the support roller and a working roller becomes reasonable, the roller abrasion becomes uniform, the roller loss can be reduced, the roller spalling can be avoided and the service life of the roller can be prolonged.

Description

The steekle mill backing roll

Technical field

The utility model relates to a kind of backing roll, a kind of specifically steekle mill backing roll.

Background technology

The backing roll of steekle mill adopts parallel roll profile usually at present, perhaps has the parallel roll profile of chamfering.When steekle mill adopts these roll shapes, occur following problem easily: local high spot appears in the contact pressure between backing roll and the working roll, causes the roll uneven wear, and roller consumption is high, can cause the roll localized delamination when serious, influences roll service life.

Summary of the invention

Technical problem to be solved in the utility model is: at the shortcoming of above prior art, a kind of steekle mill backing roll is proposed, in use the contact pressure between this backing roll and the working roll will distribute rationally, and roll wear is wanted evenly, to avoid spalling of rolls.

The technical scheme that the utility model solves above technical problem is: the steekle mill backing roll, its roll shape adopts the curve roll shape.

The curve of curve roll shape is the high-order moment function curve, and the convexity of backing roll is 1～3mm.

The utility model has the advantages that: adopt the curve roll shape, can effectively solve unreasonable, the problems such as roll wear is inhomogeneous, roll localized delamination of contact pressure distribution.Make that the contact pressure distribution between backing roll and the working roll is reasonable, roll wear is even, reduces the roller consumption, avoids spalling of rolls, prolongs roll service life.

Description of drawings

Fig. 1 is the utility model backing roll cross section enlarged diagram.

Fig. 2 is the roll gap pressure distribution map that adopts flat backing roll and the utility model backing roll under the identical rolling condition.

The specific embodiment

Embodiment one

The cross section enlarged diagram of present embodiment as shown in Figure 1, a kind of steekle mill backing roll, its roll shape is a high-order moment function curve roll shape, promptly the chamfering 2 of backing roll 1 is a curve.

The roller curve equation is:

y＝C×y ₀ (1)

In the formula: C---backing roll convexity, C=1～3mm;

y ₀---unit convexity roller curve,

${\mathrm{<figure-callout\; id="0"\; label="y"\; filenames="Y200820185131E00071.png"\; state="\{\{state\}\}">y</figure-callout>}}_0=\underset{i=1}{\overset{8}{\mathrm{\&Sigma;}}}{(-1)}^i{a}_i{x}^i---\left(2\right)$

a _i---the roll shape parameter, $a_i=0~\frac{100}{{(l/2)}^i},$ a _iCan not be 0 simultaneously;

L---backing roll barrel length, mm;

X---body of roll direction coordinate, x=0～1;

Y---backing roll roller curve.

Wherein, described steekle mill is 1～3mm with the backing roll convexity.

Roller curve of the present utility model forms by grinding machine, can solve unreasonable, the problems such as roll wear is inhomogeneous, roll localized delamination of contact pressure distribution between backing roll and the working roll.

Fig. 2 is the roll gap pressure distribution map that adopts flat backing roll and the utility model backing roll under the identical rolling condition, curve a is that backing roll adopts plain-barreled roll, the roller when working roll adopts plain-barreled roll to press the power distribution indirectly, curve b is under identical rolling condition, roll shape, the roller when working roll adopts plain-barreled roll that backing roll adopts the utility model to implement press power indirectly and distribute, as seen, the backing roll roll shape that adopts the utility model to implement, compare with the flat backing roll of employing, can effectively reduce limit portion contact pressure, roll gap pressure is evenly distributed, avoids taking place peeling phenomenon.

The utility model can also have other embodiment, and the technical scheme that equal replacement of several employings or equivalent transformation form all drops within the claimed scope of the utility model.

Claims (2)

1. steekle mill backing roll, it is characterized in that: its roll shape is the curve roll shape.

2. steekle mill backing roll as claimed in claim 1 is characterized in that: the convexity of described backing roll is 1～3mm.

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