CN110314941A - A kind of production method of aluminum alloy hot rolling gradient tension force - Google Patents
A kind of production method of aluminum alloy hot rolling gradient tension force Download PDFInfo
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- CN110314941A CN110314941A CN201910726641.8A CN201910726641A CN110314941A CN 110314941 A CN110314941 A CN 110314941A CN 201910726641 A CN201910726641 A CN 201910726641A CN 110314941 A CN110314941 A CN 110314941A
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- Prior art keywords
- coiling tension
- value
- coiling
- rolling
- gradient
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention discloses a kind of production methods of aluminum alloy hot rolling gradient Coiling Tension Control to realize that coiling tension difference controls in a roll by setting the coiling tension in band different length stage.According to specific gradient tension variation slope, reach the means of different control coiling tensions.According to coils of hot rolled produced by the invention, have end properties good, surface quality is good, keeps strip coiling smooth, and do not generate viscous wound because of overtension, avoids in hot rolled coil cooling procedure, injures the abnormal qualities phenomenon such as thick difference because interlayer is viscous caused by inhomogeneous cooling.
Description
Technical field
The invention belongs to non-ferrous metal technical fields, and in particular to a kind of life of aluminum alloy hot rolling gradient Coiling Tension Control
Production method.
Background technique
Due to aluminum alloy hot rolling production it is efficient, quick, inexpensive the features such as, the processing technology of Modern aluminum alloys Strip
Generally use ingot casting-heating-hot rolling-cold rolling-heat treatment-finishing process.Wherein, it in the hot rolling production phase, needs to control certain
Coiling tension, pass through control coiling tension, it is ensured that rolling stablize simultaneously band is produced as coiled material, it is ensured that meet product quality and
Performance requirement, commonly referred to as coiling tension.Hot rolling coiling tension general control is definite value, to guarantee reeling quality.This is batched
Tension force value, generally in 8 ~ 24N/mm2。
However, according to above-mentioned Coiling Tension Control means, although the coiling tension of coils of hot rolled is solid during the rolling process
Fixed, but have ignored hot rolled coil in cooling procedure, it is influenced by environmental factor, practical web tension variation.In hot rolled coil
In storage and cooling procedure, since coiled material outer ring is cooling fast, middle part and inner ring are cooling slow, lead to coiled material actual temperature Internal and external cycle not
Unanimously.Internal and external cycle temperature is inconsistent, causes coiled material Internal and external cycle elasticity inconsistent, to interlayer spacings occur, in cold rolling cogging
In the process, generating interlayer scratch is " viscous wound " defect.
It is produced since coils of hot rolled is generally used for cold rolling, subsequent after finishing is handled, the above-mentioned volume Wen Bianhua of hot rolled coil,
End properties are influenced less, and the scratch generated can be gradually blanked in following process, therefore the problem is typically omitted.
And hot rolled coil is when being directly used in subsequent finished product, the variation of the performance then will lead to product and not be available and reduce yield rate, this is viscous
Hurt the generation of defect, also easily causes the complaint and complaint of client.
Summary of the invention
It is an object of the invention to a kind of meet mechanical property requirements in view of the shortcomings of the prior art, providing, also ensure that table
Face is not because interlayer spacings generate viscous wound, the coils of hot rolled production method with gradient Coiling Tension Control.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of production method of aluminum alloy hot rolling gradient Coiling Tension Control is the Coiling Tension Control after the rack of hot finishing end
When, using the control means for becoming coiling tension, keep strip coiling smooth, and do not generate viscous wound because of overtension, and make
Different coiling tensions is realized on same coiled material, it is ensured that band can guarantee the uniformity of bulk temperature in subsequent cooling procedure,
Interlayer is viscous caused by avoid the difference because of Internal and external cycle temperature injures mechanical heterogeneity.
A kind of production method of aluminum alloy hot rolling gradient Coiling Tension Control, specifically includes the following steps:
1) when rolling the initial stage, by Coiling Tension Control in A value；
2) after being rolling to band certain length L, coiling tension is changed with certain slope K, so that Coiling Tension Control value adjusts
To B value；
3) after coiling tension is adjusted to B value, then by coiling tension of B value control production is carried out.
In order to reach properties of product requirement, in the Coiling Tension Control of step 1), coiling tension A value is wanted for normal process
Seek 8 ~ 24N/mm2, to reach specific mechanical property and Product Status.
In order to guarantee the stability of the operation of rolling, the mill length L value of step 2 be band start the 100m after rolling with
Roll any value between the 100m before terminating.The selection principle of L value are as follows: ensure the operation of rolling in the stable rolling stage,
It is controlled further according to practical rolling temperature and requires and select.
Meanwhile to avoid speed suddenly change in the operation of rolling, cause template, thick poor, roll-force, convexity mutation,
The slope K of step 2 setting, K=v × (B-A)/(k × π × D), wherein v is the mill speed of last rack at L, D
For the roll diameter of roller of the last one rack, and as v >=3.0m/s, k value is 2, and as 0 < v < 3.0m/s, k value is 1.K
Range be -30 ~ 30N/mm3, B and A value be not identical, and absolute difference≤8N/mm of 0 < B and A2。
The control of coiling tension gradient: it realizes in same a roll, is produced with different coiling tensions.
It rationally controls the starting point of gradient Coiling Tension Control: passing through and choose reasonable starting point L, it is ensured that the operation of rolling
Stability.
The setting of slope K value: by setting defining K value, so that both ensure to roll is coherent in Coiling Tension Control change procedure
Property, continuous, the rapidity of coiling tension variation are in turn ensured, so that it is guaranteed that band performance after the stability and rolling of the operation of rolling
Uniformity.
The setting of coiling tension B: by using the difference with coiling tension A value initially set, and ensure in 8N/mm2
Difference in range ensure that the stability of band.
According to the control means and relevant parameter of this patent, the hot-rolled band with different Coiling Tension Controls is obtained, is made
Strip coiling is smooth, and viscous wound is not generated because of overtension, and ensures to avoid during band is cooling because of Internal and external cycle temperature
The difference of degree causes the uneven and interlayer of mechanical property is viscous to hurt defect.
The beneficial effects of the present invention are:
A kind of production method of aluminum alloy hot rolling gradient Coiling Tension Control is in last rack Coiling Tension Control of hot finishing
When, using the control means for becoming coiling tension, so that realizing different coiling tensions on same coiled material, it is ensured that band is subsequent
In cooling procedure, it can guarantee that interlayer spacings are almost the same, to avoid the viscous wound of interlayer caused by the difference because of Internal and external cycle interlayer spacings.
Furthermore it is ensured that the not loose layer of inner ring, staggered floor, and ensure coiled material not and cause because coiling tension is excessive viscous to hurt problem.To provide
It is a kind of to batch smooth and do not hurt because overtension generation is viscous, also ensure that surface was not hurt because interlayer spacings generation is viscous, have
The coils of hot rolled production method of gradient Coiling Tension Control.
Detailed description of the invention
1 gradient tension schematic diagram of Fig. 1 embodiment.
2 gradient tension schematic diagram of Fig. 2 embodiment.
Fig. 3 comparative example tension schematic diagram.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited only to these embodiments.
Embodiment 1
A kind of 5182 aluminium alloys, 320 DEG C of finishing temperature, hot-rolled state is F state, is produced on 1+3 hot-rolling mill, coiling tension is
20N/mm2Last rack F3 roller diameter is 750mm, produces thickness 4.5mm, width 1450mm, and band total length is rolling for 1200m
During system, the production method of gradient tension force is as follows:
1) when rolling the initial stage, by Coiling Tension Control in 20N/mm2；
2) after being rolling to band length 1000m, the F3 mill speed at this is 3.2m/s, and k value is that 2, B value is 22N/mm2,
Coiling tension is changed with certain slope K, K=v × (B-A)/(k × π × D)=1.359N/mm3.I.e. with 1.359N/mm3Slope
Make Coiling Tension Control by 20N/mm2It is adjusted to 22N/mm2。
3) when coiling tension is adjusted to 22N/mm2Afterwards, with 22N/mm2Control production is carried out for coiling tension.
5182 aluminum alloy heat strip made from the present embodiment, the coiling tension of outer ring are 22N/mm2, inner ring and middle part
Tension be 20N/mm2, in the cooling procedure of band, although outer ring cooling velocity is fast, the coiling tension of outer ring is big, finally
During whole temperature drop, reduce Internal and external cycle elasticity difference, to alleviate intercalated dislocation, it is viscous to reduce outer ring interlayer
Wound has achieved the effect that tension gradient controls.
The present embodiment gradient tension variation diagram is shown in Fig. 1.
Embodiment 2
A kind of 5052 aluminium alloys, 300 DEG C of finishing temperature, hot-rolled state is F state, is produced on 1+3 hot-rolling mill, coiling tension is
24N/mm2Last rack F3 roller diameter is 750mm, produces thickness 3.0mm, width 1150mm, and band total length is rolling for 800m
During system, the production method of gradient tension force is as follows:
1) when rolling the initial stage, by Coiling Tension Control in 24N/mm2；
2) after being rolling to band length 200m, the F3 mill speed at this is 2.5m/s, and k value is that 1, B value is 16N/mm2,
Coiling tension is changed with certain slope K, K=v × (B-A)/(k × π × D)=- 8.493N/mm3.I.e. with -8.493N/mm3It is oblique
Rate makes Coiling Tension Control by 24N/mm2It is adjusted to 16N/mm2。
3) when coiling tension is adjusted to 16N/mm2Afterwards, with 16N/mm2Control production is carried out for coiling tension.
The coiling tension at 5182 aluminum alloy heat strip made from the present embodiment, outer ring and middle part is 16N/mm2, inner ring
Tension be 24N/mm2, that is, ensure that band rolls tightly, avoid inner ring pine faulted layer, in turn avoid because coiling tension it is excessive caused by
Batch and viscous hurt problem.
The present embodiment gradient tension variation diagram is shown in Fig. 2.
Comparative example 1
In the hot rolling production phase, control coiling tension is 24N/mm2Or 20 N/mm2, remaining condition is the same as embodiment 1.Its identical tension
Schematic diagram is shown in Fig. 3.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (4)
1. a kind of production method of aluminum alloy hot rolling gradient Coiling Tension Control, it is characterised in that: produced in the hot rolling of aluminium alloy
In the process, with the progress of the operation of rolling, in specific length range, coiling tension according to certain slope variation so that
Coiling tension is gradually adjusted to another value by some value, so that coiling tension realizes change of gradient in same a roll.
2. a kind of production method of aluminum alloy hot rolling gradient Coiling Tension Control as described in claim 1, it is characterised in that: tool
Body the following steps are included:
When rolling the initial stage, by Coiling Tension Control in A value；
After being rolling to band certain length L, coiling tension is changed with certain slope K, so that Coiling Tension Control value is adjusted to B
Value；
3) after coiling tension is adjusted to B value, then by coiling tension of B value control production is carried out.
3. the production method of aluminum alloy hot rolling gradient Coiling Tension Control according to claim 2, it is characterised in that: described
The mill length L value of step 2 be band start rolling after 100m and rolling terminate before 100m between any value, with true
Target coiling tension required for guarantor reaches.
4. the production method of aluminum alloy hot rolling gradient Coiling Tension Control according to claim 2, it is characterised in that: step
2) range of slope K is -30 ~ 30N/mm in3, K=v × (B-A)/(k × π × D), wherein v is last rack at L
Mill speed, D are the roll diameter of roller of the last one rack, and as v >=3.0m/s, and k value is 2, as 0 < v <, 3.0 m/s
When, k value is 1；B and A value be not identical, and absolute difference≤8N/mm of 0 < B and A2。
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| CN201910726641.8A CN110314941A (en) | 2019-08-07 | 2019-08-07 | A kind of production method of aluminum alloy hot rolling gradient tension force |
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| CN201910726641.8A CN110314941A (en) | 2019-08-07 | 2019-08-07 | A kind of production method of aluminum alloy hot rolling gradient tension force |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239101A (en) * | 2020-10-30 | 2021-01-19 | 骏业塑胶（深圳）有限公司 | Film winding tension control system and method |
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| EP1996347B1 (en) * | 2006-03-14 | 2010-12-15 | Converteam SAS | Method for rolling a sheet metal strip |
| JP2014028375A (en) * | 2012-07-31 | 2014-02-13 | Jfe Steel Corp | Production method of high strength steel sheet superior in edge quality and gauge uniformity |
| CN106282762A (en) * | 2016-08-09 | 2017-01-04 | 武汉钢铁股份有限公司 | The method preventing the flat volume of hot rolling high-carbon steel |
| CN109365546A (en) * | 2018-10-29 | 2019-02-22 | 中铝瑞闽股份有限公司 | A kind of production method of aluminum alloy hot rolling gradient finishing temperature control |
-
2019
- 2019-08-07 CN CN201910726641.8A patent/CN110314941A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1996347B1 (en) * | 2006-03-14 | 2010-12-15 | Converteam SAS | Method for rolling a sheet metal strip |
| JP2014028375A (en) * | 2012-07-31 | 2014-02-13 | Jfe Steel Corp | Production method of high strength steel sheet superior in edge quality and gauge uniformity |
| CN106282762A (en) * | 2016-08-09 | 2017-01-04 | 武汉钢铁股份有限公司 | The method preventing the flat volume of hot rolling high-carbon steel |
| CN109365546A (en) * | 2018-10-29 | 2019-02-22 | 中铝瑞闽股份有限公司 | A kind of production method of aluminum alloy hot rolling gradient finishing temperature control |
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| CN112239101A (en) * | 2020-10-30 | 2021-01-19 | 骏业塑胶（深圳）有限公司 | Film winding tension control system and method |
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Application publication date: 20191011 |