CN101417297A - Straightening scheme of metal plate-belt roll type combination straightening machine - Google Patents

Abstract

The invention discloses a straightening proposal of a metal slab band roller-typed combined straightener, which belongs to the technical field of the metal slab band straightener and is the improvement aiming at the existing straightening proposal. The invnetion is characterized in that in a roller system combined by a small roller system and a big roller system, a 'parallel straightening proposal' with equal rolling reduction both in a front roller system and a rear roller system is adopted, the rolling reduction thereof is as follows: s equals to 2rhow plus h-(2rhow plus h)<2>-t<2>/4, wherein, 2rhow is the curvature radius of the bend of the slab band, rhow equals to (h question mark E )/2 sigmas, h is the thickness of the slab band, E is the elastic modulus of the slab band, sigmas- is the yield limit of the slab band, and t is the roller nip of the big roller system.

Description

The aligning scheme of metal plate-belt roll type combined straightening machine

Technical field:

The invention belongs to the metal plate bands straightening technical field, be specifically related to a kind of aligning scheme of metal plate-belt roll type combination gaugger.

Background technology:

At present, the aligning scheme that the metal plate-belt roll type combined straightening machine adopts is that the smoothing roll drafts successively decreases, the method for aligning of rolled piece alternating bending, adopt this aligning scheme, in the aligning process, minimizing along with aligning strip bending curvature, the movement velocity of strip between each smoothing roll can change, as adopt central driving, each smoothing roll rotating speed is identical, in the process of aligning strip, can produce negative torque, cause strip on the aligning roll surface, to skid, cause noise, thereby reduced the straightening quality of strip.

Summary of the invention:

The object of the invention provides a kind of new aligning scheme, can effectively overcome the shortcoming that prior art exists, to adapt to the requirement of roll-type combined straightening machine.

The present invention improves prior art, it is characterized in that in roller system by pony roll system and the combination of big roller system, and " the parallel aligning scheme " that drafts all equates in the roller system before and after adopting, its drafts is

$s=2{\mathrm{\&rho;}}_w+h-\sqrt{{(2{\mathrm{\&rho;}}_w+h)}^2-t^2/4}$

In the formula: ρ _wThe bending curvature radius of-strip, ${\mathrm{\&rho;}}_w=\frac{h\&CenterDot;E}{2{\mathrm{\&sigma;}}_s}$

H-strip thickness

E-strip elastic modelling quantity

σ _s-strip yield limit

T-big roller is roll spacing

Advantage of the present invention and good effect:

1. adopt the identical parallel aligning scheme of drafts, can make the degree of crook difference of metal plate and belt in the different roller system of roll-type combined straightening machine, pony roll system in front makes strip obtain big bending curvature distortion, because metal plate and belt is in flexural deformation, the non-linear relation of bending curvature and elasticity curvature, continuous crooked large deformation, the scope of remnant curvature is reduced fast, and in the big roller system of back, make strip obtain little bending curvature distortion, continuous crooked small deformation, progressively reduce the numerical value of remnant curvature, thereby can obtain higher thin plate flattening precision.2. adopt parallel aligning scheme, can make strip each bending unit degree of crook in each roller system identical, the strip movement velocity is identical, has avoided negative torque.

The specific embodiment:

There are a metal plate and belt thickness h=400mm, elastic modulus E=210000Mpa, yield limit σ the present _s=400Mpa, getting roll-type combined straightening machine big roller is roll spacing t=400mm, brings formula into ${\mathrm{\&rho;}}_w=\frac{h\&CenterDot;E}{2{\mathrm{\&sigma;}}_s}$ With $s=2{\mathrm{\&rho;}}_w+h-\sqrt{{(2{\mathrm{\&rho;}}_w+h)}^2-t^2/4},$ Obtain drafts s=2.4mm.

Claims (1)

1. the aligning scheme of a metal plate-belt roll type combined straightening machine is the improvement to existing aligning scheme, it is characterized in that in roller system by pony roll system and the combination of big roller system, and " the parallel aligning scheme " that drafts all equates in the roller system before and after adopting, its drafts is:

$s=2{\mathrm{\&rho;}}_w+h-\sqrt{{({2\mathrm{\&rho;}}_w+h)}^2-t^2/4}$

In the formula: ρ _wThe bending curvature radius of one strip ${\mathrm{\&rho;}}_w=\frac{h\&CenterDot;E}{{2\mathrm{\&sigma;}}_s},$

The thickness of h-strip,

The elastic modelling quantity of E-strip,

σ _sThe yield limit of-strip,

Spacing in t-big roller system between smoothing roll.