CN106734236A - A kind of 5182 aluminium alloys of cold rolling production reduce the control method of broken belt - Google Patents

Abstract

The present invention relates to the control method that a kind of 5182 aluminium alloys of cold rolling production reduce broken belt, strip side portion covering weight, plate shape departure function are set up on the basis of 5182 aluminium alloys original rolling mill practice；And by optimizing the reasonable distribution of the drafts of cold-rolling process, ROLLING OIL parameter.Having the invention enables 5182 aluminium alloys can reduce cold-rolling mill broken belt, improve production efficiency, it is ensured that production safety, the effect of stabilized product quality.

Description

A kind of 5182 aluminium alloys of cold rolling production reduce the control method of broken belt

Technical field

The control method of broken belt is reduced the present invention relates to cold rolling field, particularly a kind of 5182 aluminium alloys of cold rolling production.

Background technology

The aluminium alloy material of company's leading products 5182 is mainly arranged in the Φ 1250 × 1850/2050/ of 440/ Φ of Φ 520/ 18003# cold-rolling mills are produced, and 5182 is one of alloy of high intensity in 5XXX systems alloy, and its Mg content is high due to the atom half of AL Atomic radius of the footpath than Mg is small, so Mg produces stronger reinforcing effect in AL；With the increase of Mg contents, the intensity of alloy Raise, plasticity declines.Hot rolling blank 3.0mm-0.216mm finished products arrange 6 passage productions, after working modulus reaches 45%, tension Intensity Rm >=380Mpa, yield strength Rp0.2 >=330Mpa；Processing hardening aggravation；Plasticity declines, and side is easily caused in the operation of rolling Portion's raw edges tendency, causes broken belt.

Secondly in the operation of rolling, because roll barrel temperature distributing disproportionation is even, middle part roller temperature is higher than edge temperature i.e. There is temperature difference in middle part and edge；Edge band receives tension force effect, the edge of material two to there is tension greatly, make material edge raw edges Tendency increases.Domestic advanced milling train reduces roll barrel temperature difference using the temperature of hot side spray control roll barrel edge, reaches To the effect of control band pilled-in selvedge, but company's milling train is equipped with ABB plate profile instruments and roll cooling spray system, without roll Deep fat sprays, and controls the limited in one's ability of edge temperature difference；When the product is produced using plate shape curve, easily broken belt, thickness is thinner, Processing is hard big, and broken belt rate reaches 20-25%, and exit thickness≤0.5mm passages, the passage broken belt rate is on the verge of the product thick up to 60% Degree≤0.5mm cannot be produced in the milling train.Therefore strip side portion covering is set up on the basis of 5182 aluminium alloys original rolling mill practice Weight, plate shape departure function；And by optimizing the reasonable distribution of the drafts of cold-rolling process, ROLLING OIL parameter so that 5182 aluminium Alloy has can reduce cold-rolling mill broken belt, improve production efficiency, it is ensured that production safety, the effect of stabilized product quality, be a kind of Economy, reliability, safety, the simple control method easily promoted.

The content of the invention

In view of this, the purpose of the present invention is to propose to the control method that a kind of 5182 aluminium alloys of cold rolling production reduce broken belt, Cold-rolling mill broken belt, improve production efficiency can be reduced, it is ensured that production safety, stabilized product quality.

The present invention is realized using following scheme：A kind of 5182 aluminium alloys of cold rolling production reduce the control method of broken belt, specifically Comprise the following steps：

Step S1：5182 alloy strip steel rolled stock edge covering weight is set up according to following formula：

F_d=[(W_(x)*F_e)/X_e]+[1-W_(x)*F_e±1]/X_e±1；

Wherein, X_eIt is strip side portion in plate shape roller area cover width, W_(x)It is the weight of the strip side portion area of coverage, F_eIt is plate shape The power in instrument edge area, e ± 1 is the edge adjacent region number of band two；

Step S2：Fitting flatness object curve：

Y=-5x²-130x⁶+110x⁸；

Wherein, x is the width specification of band, and centre position of strip is zero, and strip width scope is -1 to 1, Y for plate shape should Power deviation；

Step S3：Optimization cold-rolling process parameter：The middle roll crown of adjustment is 0.074mm, rolling oil temperature is 35 ± 5 DEG C, rolls Liquefaction flow percentage is 30%-60%, rolling oil pressure is 6bar-8bar, cold rolling pass reduction ratio is 30%-45%, curved Roller power control range is -50KN~+50KN.

Further, the 5182 alloy strip steel rolled stock edge covering weight is：Edge overlay capacity 5mm, 13mm, 26mm, 52mm Difference respective weights 0,0,0.1,0.2.

Further, the step S2 specifically includes following steps；

Step S21：The roller temperature that 5182 alloys are measured in different in width roll is distributed, and obtains roller temperature distribution to plate shape Deviation is：

ΔL/L*10⁵=Δ t*a/L*10⁵；

Wherein, a is roll linear expansion coefficient, a=11.0*10^-6/℃；Δ L for opposing webs datum mark roll rear length it Difference, L is the length after the rolling of band datum mark, and Δ t is that roll transverse temperature is poor, and Δ L/L refers to relative length difference, is also referred to as It is plate shape index；

Step S22：Plate shape roller stress-deviation function is obtained to the deviation of plate shape according to roller temperature distribution：

Wherein, F_iIt is the radial pressure in i areas,It is the radial pressure average value in all areas, i is examined for plate shape roller Area's number is surveyed, i=1.....n, T are strap tension, and w is strip width, and t is thickness of strip；

Step S23：Obtaining plate shape departure function is：

Wherein, Δ I is plate shape deviation, and E is elasticity modulus of materials, Δ δ_iIt is i areas plate shape stress-deviation, i=1.....n,

Step S24：Obtained according to above-mentioned steps：

Compared with prior art, the present invention has following beneficial effect：Base of the present invention in 5182 aluminium alloys original rolling mill practice Strip side portion covering weight and plate shape departure function are set up on plinth；And joined by optimizing the drafts of cold-rolling process, ROLLING OIL Several reasonable distribution so that 5182 aluminium alloys have can reduce cold-rolling mill broken belt, improve production efficiency, it is ensured that production safety, surely The effect of fixed output quota quality.

Brief description of the drawings

Fig. 1 is alloy strip steel rolled stock edge covering weight calculation schematic diagram in the embodiment of the present invention.

Fig. 2 is 5182 alloy different in width roll roller temperature distribution schematic diagrams in the embodiment of the present invention.

Fig. 3 is plate shape aberration curve schematic diagram in the embodiment of the present invention.

Fig. 4 is plate shape stress-deviation curve synoptic diagram in the embodiment of the present invention.

Fig. 5 be the embodiment of the present invention in adjust before junction belt thermometric when plate shape curve map.

Fig. 6 is the new flatness object curve schematic diagram of fitting after being adjusted in the embodiment of the present invention.

Fig. 7 is the preceding plate shape both sides portion stress intensity schematic diagram of adjustment in the embodiment of the present invention.

Fig. 8 is plate shape both sides portion stress intensity schematic diagram after being adjusted in the embodiment of the present invention.

Fig. 9 is the small raw edges of band end face, the easy broken belt schematic diagram of small burr after being rolled in the embodiment of the present invention.

Rear band end face is good, have no raw edges and burr schematic diagram to be rolled in the embodiment of the present invention for Figure 10.

Specific embodiment

Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.

The control method that a kind of 5182 aluminium alloys of cold rolling production reduce broken belt is present embodiments provided, following step is specifically included Suddenly：

Step S1：5182 alloy strip steel rolled stock edge covering weight is set up according to following formula：

F_d=[(W_(x)*F_e)/X_e]+[1-W_(x)*F_e±1]/X_e±1；

Wherein, X_eIt is strip side portion in plate shape roller area cover width, W_(x)It is the weight of the strip side portion area of coverage, F_eIt is plate shape The power in instrument edge area, e ± 1 is the edge adjacent region number of band two, and specific schematic diagram calculation is as shown in Figure 1；

Step S2：Fitting flatness object curve：

Y=-5x²-130x⁶+110x⁸；

Wherein, x is the width specification of band, and centre position of strip is zero, and strip width scope is -1 to 1, Y for plate shape should Power deviation；

Step S3：Optimization cold-rolling process parameter：The middle roll crown of adjustment is 0.074mm, rolling oil temperature is 35 ± 5 DEG C, rolls Liquefaction flow percentage is 30%-60%, rolling oil pressure is 6bar-8bar, cold rolling pass reduction ratio is 30%-45%, curved Roller power control range is -50KN~+50KN.

In the present embodiment, the 5182 alloy strip steel rolled stock edge covering weight is：Edge overlay capacity 5mm, 13mm, 26mm, 52mm distinguishes respective weights 0,0,0.1,0.2.Shown in table specific as follows：

Strip side portion cover width (X)/mm	Weight (WX)
		5	0.0
13	0.0
		26	0.1
52	0.2

In the present embodiment, the step S2 specifically includes following steps；

Step S21：The roller temperature that 5182 alloys are measured in different in width roll is distributed, as shown in Fig. 2 obtaining roller temperature point Cloth is (Fig. 3 is plate shape aberration curve figure) to the deviation of plate shape：

ΔL/L*10⁵=Δ t*a/L*10⁵；

Wherein, a is roll linear expansion coefficient, a=11.0*10^-6/℃；Δ L for opposing webs datum mark roll rear length it Difference, L is the length after the rolling of band datum mark, and Δ t is that roll transverse temperature is poor, and Δ L/L refers to relative length difference, is also referred to as It is plate shape index；

Step S22：(Fig. 4 is plate shape to obtain plate shape roller stress-deviation function to the deviation of plate shape according to roller temperature distribution Stress-deviation curve map)：

Wherein, F_iIt is the radial pressure in i areas,It is the radial pressure average value in all areas, i is examined for plate shape roller Area's number is surveyed, i=1.....n, T are strap tension, and w is strip width, and t is thickness of strip；

Step S23：Obtaining plate shape departure function is：

Wherein, Δ I is plate shape deviation, and E is elasticity modulus of materials, Δ δ_iIt is i areas plate shape stress-deviation, i=1.....n,

Step S24：Obtained according to above-mentioned steps：

Preferably, being controlled using the method for the present embodiment, the effect is significant before and after plate shape adjustment.

Plate shape curve map when Fig. 5 is the junction belt thermometric before adjustment, Fig. 6 is the new flatness object curve of fitting after adjustment Schematic diagram.Fig. 7 is plate shape both sides portion stress intensity schematic diagram before adjustment, and Fig. 8 is that plate shape both sides portion stress intensity is illustrated after adjusting Figure.Fig. 9 is the small raw edges of band end face, the easy broken belt schematic diagram of small burr after rolling, and Figure 10 is to roll that rear band end face is good, have no Raw edges and burr schematic diagram.

The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with Modification, should all belong to covering scope of the invention.

Claims (3)

1. a kind of 5182 aluminium alloys of cold rolling production reduce the control method of broken belt, it is characterised in that：Comprise the following steps：

Step S1：5182 alloy strip steel rolled stock edge covering weight is set up according to following formula：

F_d=[(W_(x)*F_e)/X_e]+[1-W_(x)*F_e±1]/X_e±1；

Wherein, X_eIt is strip side portion in plate shape roller area cover width, W_(x)It is the weight of the strip side portion area of coverage, F_eIt is plate profile instrument side The power in area of portion, e ± 1 is the edge adjacent region number of band two；

Step S2：Fitting flatness object curve：

Y=-5x²-130x⁶+110x⁸；

Wherein, x is the width specification of band, and centre position of strip is zero, and strip width scope is that -1 to 1, Y is that plate shape stress is inclined Difference；

Step S3：Optimization cold-rolling process parameter：Roll crown is 0.074mm, rolls oil temperature for 35 ± 5 DEG C, ROLLING OIL in the middle of adjustment Flow percentage is 30%-60%, rolling oil pressure is 6bar-8bar, cold rolling pass reduction ratio is 30%-45%, bending roller force Control range is -50KN~+50KN.

2. a kind of 5182 aluminium alloys of cold rolling production according to claim 1 reduce the control method of broken belt, it is characterised in that： The 5182 alloy strip steel rolled stock edge covers weight：Edge overlay capacity 5mm, 13mm, 26mm, 52mm difference respective weights 0,0, 0.1、0.2。

3. a kind of 5182 aluminium alloys of cold rolling production according to claim 1 reduce the control method of broken belt, it is characterised in that： The step S2 specifically includes following steps；

Step S21：The roller temperature that 5182 alloys are measured in different in width roll is distributed, and obtains deviation of the roller temperature distribution to plate shape For：

ΔL/L*10⁵=Δ t*a/L*10⁵；

Wherein, a is roll linear expansion coefficient, a=11.0*10^-6/℃；Δ L is the difference that opposing webs datum mark rolls rear length, and L is Length after the rolling of band datum mark, Δ t is that roll transverse temperature is poor, and Δ L/L refers to relative length difference, also referred to as plate shape Index；

Step S22：Plate shape roller stress-deviation function is obtained to the deviation of plate shape according to roller temperature distribution：

${\mathrm{\Δ\σ}}_i=\frac{F_i-\stackrel{\‾}{F}}{\stackrel{\‾}{F}}\×\frac{T}{w\×t};$

Wherein, F_iIt is the radial pressure in i areas,It is the radial pressure average value in all areas, i is plate shape roller detection zone Number, i=1.....n, T are strap tension, and w is strip width, and t is thickness of strip；

Step S23：Obtaining plate shape departure function is：

$\mathrm{\Δ}I=\frac{\mathrm{\Δ}L}{L}=\frac{{\mathrm{\Δ\δ}}_i}{E}\×{10}^5;$

Wherein, Δ I is plate shape deviation, and E is elasticity modulus of materials, Δ δ_iIt is i areas plate shape stress-deviation, i=1.....n；

Step S24：Obtained according to above-mentioned steps：

${\mathrm{\Δ\δ}}_i=\frac{\mathrm{\Δ}I\×E}{{10}^5}.$