CN102921735B - Device for restraining vibration of high-speed rolling mill by reducing speed fluctuation of rolling inlet of aluminum foil - Google Patents

Abstract

The invention discloses a device for restraining the vibration of a high-speed rolling mill by reducing the speed fluctuation of a rolling inlet of an aluminum foil. A frame is arranged at the front end of the mill equipment and at the rolling inlet of the aluminum foil. Two guide rollers and a tensioning roller are arranged in the frame, wherein the two guide rollers are mounted at the upper part of the frame; the tensioning roller is mounted at the lower part of the frame and between the two guide rollers; a small gear is mounted on a roll neck at one end of each guide roller; a big gear is mounted on the shaft neck of a flywheel; the flywheel is mounted in a flywheel mounting groove in the outer side of the frame; and the small gear on each guide roller and the big gear on the flywheel are matched in a gear engaging manner. The device provided by the invention has the advantages of simple mechanism structure and easiness in maintenance and repair, and has a good effect of restraining the speed fluctuation of the rolling inlet of the aluminum foil.

Description

Reduce the device that the fluctuation of aluminum foil rolling entrance velocity suppresses fast mill flutter

Technical field

The present invention relates in a kind of process of rolling aluminum foil, suppress the device of fast mill flutter, relate in particular to a kind of device reducing the fluctuation of aluminum foil rolling entrance velocity and suppress fast mill flutter, belong to rolling antivibration area.

Background technology

In high-speed rolling process, the defect of the rolling aluminium foil product surface quality that the flutter due to milling train causes, as rolled products vibration line, is ubiquitous problem during rolling aluminium foil is produced, and is also the technical barrier of puzzlement rolling industry in world wide.Vibration line refers to the light and dark striped that band milling material surface is formed, the quality of the generation not only influence of rolled product of vibration line, and the violent flutter of milling train also can cause broken belt or device damage accident, threatens production safety also to cause huge economic loss.

At present, many scholars and expert are studied vibration line problem both at home and abroad: the mechanism that involving vibrations line produces, the vibration performance of vibration line, the suppressing method of vibration line, the vibration monitoring of milling train and analysis, restraining device of rolled strip flutter etc.But on the whole, research also at the experimental stage is more, and the method and apparatus really dropping into utilization in actual production is less; System for monitoring and analyze Mill chattering is more, and the device being directly used in fast mill Flutter Suppression rarely has application.

Theoretical research and experiment show, the generation of the surface quality defects such as the vibration line of such as rolling aluminium foil in essence, is caused by the flutter of fast mill.At present, the surface quality that two kinds of typical Mill chatterings affect Strip has been defined: one is third octave flutter, causes the fluctuation of tension force between the significant change of rolled piece thickness and frame; Another kind is Fifth Octave flutter, causes rolled piece surface perpendicular to the chatter mark phenomenon of rolling direction.The fluctuation of fast mill rolling entrance velocity, causes the fluctuation of roll-force, causes the flutter of fast mill, has a strong impact on the quality of rolled steel product.

Therefore, improve the surface quality of rolled steel product, suppressing the open defects such as vibration line, fundamentally, is the flutter being suppressed fast mill by various apparatus and method.

Summary of the invention

The present invention is directed to the deficiencies in the prior art, provide a kind of device reducing the fluctuation of aluminum foil rolling entrance velocity and suppress fast mill flutter.

The technical scheme that technical solution problem of the present invention is taked is:

Reduce the device that the fluctuation of aluminum foil rolling entrance velocity suppresses fast mill flutter, comprise frame, lead a roller, idler roller, flywheel, gear wheel and pinion.

In milling equipment front end, the rolling porch of aluminium foil is provided with frame, and be provided with two in frame and lead a roller and an idler roller, wherein lead the top that a roller is arranged on frame for two, idler roller is arranged on the bottom of frame, and idler roller is installed on two and leads in the middle of a roller.

Pinion is arranged on the roll neck place, one end leading a roller, and gear wheel is arranged on the axle journal of flywheel; Flywheel is arranged in the flywheel mounting groove on outside frame, leads the fit system that the pinion on a roller and the gear wheel on flywheel are gears meshing.

Beneficial effect of the present invention: the reduction aluminum foil rolling entrance velocity fluctuation that the present invention proposes suppresses the device of fast mill flutter, the frame for movement of its device is simple, be easy to maintenance, suppress the effective of aluminum foil rolling entrance velocity fluctuation, its Principle Method has feasibility.

In high-speed rolling process, the fluctuation of aluminum foil rolling entrance velocity can be reduced in real time, thus reach the object suppressing fast mill flutter, improve surface quality and the production efficiency of rolling aluminium foil products, reduce the wearing and tearing of roll surface, be with a wide range of applications in the production of reality.

Accompanying drawing explanation

Fig. 1 is the overall schematic of apparatus of the present invention;

Fig. 2 be apparatus of the present invention partly cut open three-dimensional view;

Fig. 3 is the side view of apparatus of the present invention;

Fig. 4 is the theory of mechanics structure chart of apparatus of the present invention;

Fig. 5 is the structure chart of leading a roller;

Fig. 6 is the structure chart of flywheel;

Fig. 7 is theoretical foundation of the present invention and principle feedback diagram.

In figure: 1, frame; 2, aluminium foil; 3, flywheel; 4, a roller is led; 5, idler roller; 6, rolling-mill housing; 7, upper backup roll; 8, top working roll; 9, bottom working roll; 10, lower backing roll; 11, gear wheel; 12, pinion; 13, flywheel mounting groove.

Detailed description of the invention

Below in conjunction with accompanying drawing, the invention will be further described.

As shown in Figure 1, reduce the device that the fluctuation of aluminum foil rolling entrance velocity suppresses fast mill flutter, its structure comprises: frame 1, lead a roller 4, idler roller 5, flywheel 3, gear wheel 11, pinion 12 and milling equipment.As shown in Figure 2, in milling equipment front end, the frame 1 of the rolling porch setting device of aluminium foil 2, its sprocket bit roller 4 is arranged on the upper part of frame 1, and idler roller 5 is arranged on the lower part of frame 1, and idler roller 5 is installed on two and leads in the middle of a roller 4; Pinion 12 is arranged on the left end roll neck place leading a roller 4, on the axle journal of gear wheel 11 Flywheel 3; In flywheel mounting groove 13 on flywheel 3 installation frame, lead the kind of drive that the pinion 12 on a roller 4 and the gear wheel 11 on flywheel 3 are gears meshing.

As shown in Figure 3, flywheel mounting groove is processed with in the left side of frame.

As shown in Figure 4 and Figure 5, lead a roller 4 one and have two, two structures leading a roller are identical, at the left end roll neck place leading a roller, install pinion 12; Described idler roller 5 pairs of rolling aluminium foils 2 have the effect supporting tensioning.

As shown in Figure 6, gear wheel 12 is installed at the axle journal place of flywheel 3, and flywheel 3 has a large the moment of inertia.

As shown in Figure 2, milling equipment comprises rolling-mill housing 6, upper backup roll 7, top working roll 8, bottom working roll 9 and lower backing roll 10.

As shown in Figure 4, in the operation of rolling of aluminium foil 2, in the rolling porch of milling equipment rolling aluminium foil 2, the horizontal movement of aluminium foil 2 is through the support tensioning of idler roller, the rotation of a roller 4 is led in drive two, the pinion 12 of leading on a roller 4 drives the gear wheel 11 on flywheel 3 by meshed transmission gear mode, thus drive flywheel 3 to rotate, flywheel 3 has a larger the moment of inertia, therefore the present invention can make the rolling entrance velocity of aluminium foil more stable, serve the effect of the fluctuation reducing aluminum foil rolling entrance velocity in the operation of rolling, and then reach the object suppressing fast mill flutter.

As shown in Figure 7, the theoretical foundation and the principle that reduce the fluctuation of aluminum foil rolling entrance velocity and suppress the device of fast mill flutter will be illustrated below:

In the high-speed rolling of aluminium foil, the fluctuation of the rolling entrance velocity of aluminium foil, causes the length of inlet of rolling mill side aluminium foil to change, i.e. entrance side aluminium foil length variations amount:

wherein Δ μ ₁for the undulate quantity of rolling entrance velocity;

Entrance side aluminium foil length variations amount Δ L causes the fluctuation of rolled piece entrance tension force, i.e. the variable quantity of aluminium foil entrance tension force:

wherein, E ₁for elastic modelling quantity;

According to classical tube rolling simulation model, the fluctuation of aluminium foil entrance tension force directly causes the fluctuation of roll-force, i.e. aluminium foil entrance tension variation amount Δ T ₀the undulate quantity of the roll-force caused:

$\mathrm{\ΔP}=-0.7\mathrm{\Δ}{T}_0{Q}_{P}B\sqrt{R^{\′}\mathrm{\Δh}}$

Wherein, Q _prepresent stress status modulus, drawn by Hill formulae discovery; B represents aluminium foil width; Δ h represents absolute draft amount; R' represents roll flattening radius, is determined, that is: by Hitchcock formula in formula: R-working roll radius, P-roll-force, C ₀-Hitchcock constant, e1 is elastic modelling quantity, and γ is working roll Poisson's ratio.

The fluctuation of roll-force directly causes the flutter of fast mill and the change of aluminium foil exit thickness; The flutter of fast mill, directly causes the fluctuation of rolling entrance velocity on the one hand; On the other hand, the flutter of fast mill can cause the change of aluminium foil exit thickness indirectly, and the change of aluminium foil exit thickness directly causes the fluctuation of aluminium foil entrance velocity.

Its relation is as follows: the flutter of fast mill makes two working rolls of milling train produce vibration displacement Y, working roll vibration displacement:

Y＝Y _mcosωt

The change of working roll vibration displacement causes aluminium foil exit thickness y ₂change, i.e. aluminium foil exit thickness:

y ₂＝y _2m+2Y＝y _2m+2Y _mcosωt

In above formula, y _2mrepresent mean value, by rolling roll gap arbitrary moment metal mass flow equal, then have formula:

μ ₁y ₁＝μ ₂y ₂＝Φ

Wherein, Φ is the metal flow of moment in roll gap; Front sliding rate is constant, i.e. μ ₂remain unchanged.

From above formula, aluminium foil exit thickness y ₂change cause again aluminium foil entrance velocity μ ₁fluctuation, i.e. rolled piece entrance velocity:

${\mathrm{\μ}}_1=\frac{{\mathrm{\μ}}_2{y}_2}{y_1}=\frac{{\mathrm{\μ}}_2}{y_1}(y_{2m}+2Y_m\cos \mathrm{\ωt})=\frac{{\mathrm{\μ}}_2{y}_{2m}}{y_1}+\frac{2{\mathrm{\μ}}_2{Y}_m\cos {\mathrm{\ω}}_t}{y_1}={\mathrm{\μ}}_{1m}+\mathrm{\Δ}{\mathrm{\μ}}_1$

Wherein, the speed that unreels of unreeling machine keeps constant-mu _1mremain unchanged.

Above formula shows, the entrance velocity of aluminium foil adds Δ μ ₁.

The present invention starts with from the fluctuation of reduction or elimination aluminum foil rolling entrance velocity, by above mechanical device, is reduced to minimum by the undulate quantity of the rolling entrance velocity of aluminium foil, thus reaches the object suppressing fast mill flutter.

Claims (1)

1. reduce the device that the fluctuation of aluminum foil rolling entrance velocity suppresses fast mill flutter, comprise frame, lead a roller, idler roller, flywheel, gear wheel and pinion, it is characterized in that:

In milling equipment front end, the rolling porch of aluminium foil is provided with frame, and be provided with two in frame and lead a roller and an idler roller, wherein lead the top that a roller is arranged on frame for two, idler roller is arranged on the bottom of frame, and idler roller is installed on two and leads in the middle of a roller;

Pinion is arranged on the roll neck place, one end leading a roller, and gear wheel is arranged on the axle journal of flywheel; Flywheel is arranged in the flywheel mounting groove on outside frame, leads the fit system that the pinion on a roller and the gear wheel on flywheel are gears meshing.