CN102773255A - Continuous asynchronous rolling device of magnesium alloy sheet strip coil - Google Patents
Continuous asynchronous rolling device of magnesium alloy sheet strip coil Download PDFInfo
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- CN102773255A CN102773255A CN2012102548280A CN201210254828A CN102773255A CN 102773255 A CN102773255 A CN 102773255A CN 2012102548280 A CN2012102548280 A CN 2012102548280A CN 201210254828 A CN201210254828 A CN 201210254828A CN 102773255 A CN102773255 A CN 102773255A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 89
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 32
- 238000012546 transfer Methods 0.000 claims description 12
- 238000003801 milling Methods 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
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- 229910052751 metal Inorganic materials 0.000 description 9
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- 239000000463 material Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
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- 230000002349 favourable effect Effects 0.000 description 1
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Abstract
本发明一种镁合金薄板带卷连续异步轧制装置，属于镁合金材料领域。本发明通过开卷装置将镁合金带卷开卷，并通过张力夹送辊进入矫直机进行矫直，矫直后通过张力夹送辊进入带卷预热装置加热到设定温度，通过测厚仪测量来料厚度，进入连续异步轧机进行轧制，轧制后的带卷经张力夹送辊，通过测厚仪测量成品厚度，进入卷取机卷取，建立稳定的轧制张力后，实现整个带卷轧制。本发明装置具有降低轧制压力和轧制转矩，降低能耗，增大道次变形量，提高轧制效率高等特点，有利于对镁合金等较难变形的带卷进行轧制生产。
The invention relates to a continuous asynchronous rolling device for magnesium alloy thin plate coils, which belongs to the field of magnesium alloy materials. In the present invention, the magnesium alloy strip is uncoiled through the uncoiling device, and enters the straightening machine through the tension pinch roller for straightening. Measure the thickness of the incoming material, enter the continuous asynchronous rolling mill for rolling, the rolled strip passes through the tension pinch roller, measures the thickness of the finished product through the thickness gauge, and enters the coiler for coiling. After establishing a stable rolling tension, the whole process is realized. Coil rolling. The device of the invention has the characteristics of reducing rolling pressure and rolling torque, reducing energy consumption, increasing pass deformation, improving rolling efficiency, etc., and is beneficial to the rolling production of difficult-to-deform coils such as magnesium alloys.
Description
Technical field
The present invention relates to the magnesium alloy materials field, technology and device that the particularly different fabric width magnesium alloy sheet roll coil of strips are produced.
Background technology
Rolling magnesium alloy sheet roll coil of strip product belongs to magnesium alloy deep processing industry, is new material industry and encourage growth project that country supports.The rolling magnesium alloy board of high-performance be directly make or be processed into through being shaped have conduction, the main material of the fine structure part of multiple functions such as heat radiation, damping, noise control, energy-conservation, lightweight; Be mainly used in and produce electronics and IT products (like computer, communication, consumption electronic product etc.) housing, automotive electronics shell, framework, instrument board, household electrical appliances and war products etc.This material has advantages such as added value height and environmental protection.
The fundamental difference of asymmetrical rolling and pair rolling is: it is poor to make the surface of upper and lower working roll produce certain speed by predetermined requirement during asymmetrical rolling, and the characteristics that so just caused metal in the deformed area, to flow are different with pair rolling.Metal phase breaker roll has zone of slippage on the delivery side and zone of slippage on the entry side in the pair rolling deformed area, and frictional force is pointed to neutral point.Therefore, the frictional force of its upper and lower contact arc, draught pressure all is symmetrical with reversing.Asymmetrical rolling is because upper and lower roll has speed difference; The neutral point of upper and lower roll is not in same vertical plane; Roller side neutral point moves to entrance side at a slow speed; Quick roll side neutral point moves to outlet side, has so just formed upper and lower frictional force zone in the opposite direction, deformed area, shown in the II district among Fig. 1.
Compare with pair rolling; During asymmetrical rolling; Because the roll linear velocity does not wait; Metal is also asymmetric with the relative motion of roll in the deformed area; The neutral point of upper and lower roll is not in same vertical plane; Roller side <img file=" 2012102548280100002DEST_PATH_IMAGE001.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> neutral point moves to entrance side at a slow speed; Quick roll <img file=" 715354DEST_PATH_IMAGE002.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 18 " /> side neutral point moves to outlet side; Promptly the neutral angle of two rolls is unequal, <img file=" 2012102548280100002DEST_PATH_IMAGE003.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " /> < <img file=" 239876DEST_PATH_IMAGE004.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 18 " /> (as shown in Figure 1).Remove in the deformed area outside the III district, zone of slippage on the delivery side of symmetry; Between unequal neutral angle <img file=" 649998DEST_PATH_IMAGE003.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " /> and <img file=" 387009DEST_PATH_IMAGE004.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 18 " />, there are a newly developed area, II district as shown in Figure 1.In this district, two rolls are in the opposite direction to the frictional force of rolled piece, form pair of shear power, become the advantage of impelling deformation of rolled wire.But image ground is claimed this district and is rolled the district for rubbing with the hands.Roll in the district in stranding, the three-dimensional compressive stress state has not existed, and draught pressure obviously can reduce, and this is very favourable to flat cold-rolled sheet.
Owing to rub the existence of rolling the district with the hands, caused the special variation of operation of rolling deformation characteristics and metal flow.Roll upper and lower surface, district in stranding, the external friction force direction is opposite, has reduced the inhibition of the formed horizontal pressure force of external friction to distortion, thereby has significantly reduced the gross pressure of rolling deformation.Because frictional force in the opposite direction has caused to rub with the hands and rolled the difference that the upper and lower surface metal in district flows, thereby in the deformed area, caused detrusion, cause metal surface quality, metallographic structure, crystal orientation and changes of mechanical properties again.Compare with pair rolling, asymmetrical rolling has remarkable reduction draught pressure and rolling torsion, reduces product energy consumption, reduces rolling pass, strengthens and rolls thin ability, improves product thickness precision and strip shape quality, improves the advantage of rolling efficiency.High for the rolling deformation drag especially, the serious ultra-thin strip of work hardening, advantage is more obvious.Adopt asynchronous continuous rolling to help improving difficult deformable metal plasticity, energy savings, enhance productivity, improve dimensional accuracy, control product texture etc.
The restriction wrought magnesium alloy is used very, and important reasons is: magnesium alloy is a close-packed hexagonal structure, and magnesium alloy has only one group of basal slip system under the room temperature, and plastic deformation ability is relatively poor, when processing, usually causes fracture.Adopt continuous asymmetrical rolling equipment to produce the magnesium alloy sheet roll coil of strip, can make its crystal grain obtain refinement, reduce roll-force and rolling torsion; Reduce product energy consumption, reduce rolling pass, enhance productivity; Strengthen the thin ability of rolling; Weaken basal plane texture, improve product thickness precision and strip shape quality, improve the processability of sheet material following process.
Technological process is: on wind off volume, aligning, preheating, roll preceding thickness measuring, rolling, roll the back thickness measuring, batch.
Summary of the invention
To twist in the deformation temperature interval that is allowed when rolling little in order to solve magnesium alloy thin plate and band in the present invention, and plastic deformation ability is relatively poor, and reduction in pass is little, is difficult for carrying out continuously difficult points such as plate shape, the thickness of slab precision of heat/warm-rolling and rolling thin coiled stock be wayward.Through adopting this device, can significantly reduce the draught pressure and the rolling torsion of the magnesium alloy sheet roll coil of strip, reduce product energy consumption, reduce rolling pass, strengthen and roll thin ability, improve product thickness precision and strip shape quality, improve advantages such as rolling efficiency.
The continuous asymmetrical rolling device of a kind of magnesium alloy sheet roll coil of strip comprises: uncoiler; First deflection pinches transfer roller; The first tension force pinch roll; Straightener; The second tension force pinch roll; Online heater; The 3rd tension force pinch roll; First calibrator; First guide roller; First backing roll; Second guide roller; First working roll; Second working roll; Second guide roller; The 3rd working roll; The 3rd guide roller; The 4th working roll; The 4th guide roller; The 5th working roll; The 5th guide roller; Second backing roll; The 4th tension force pinch roll; Second calibrator; Second deflection pinches transfer roller; Coiling machine.
Uncoiler; First deflection pinches transfer roller; The first tension force pinch roll; Straightener; The second tension force pinch roll; Online heater; The 3rd tension force pinch roll; First calibrator; First guide roller; First backing roll; Second guide roller; First working roll; Second working roll; Second guide roller; The 3rd working roll; The 3rd guide roller; The 4th working roll; The 4th guide roller; The 5th working roll; The 5th guide roller; Second backing roll; The 4th tension force pinch roll; Second calibrator; Second deflection pinches transfer roller; Coiling machine; Arrange in proper order along the direction that penetrates of magnesium alloy strip respectively.
The present invention passes through decoiling equipment with the magnesium alloy strip coil uncoiling, and aligns through tension force pinch roll entering straightener, and the aligning back gets into roll coil of strip preheating device through the tension force pinch roll and is heated to design temperature; Measure supplied materials thickness through calibrator, get into continuous asynchronous rolling machine and be rolled, the roll coil of strip after rolling is through the tension force pinch roll; Measure finished product thickness through calibrator; The entering coiling machine batches, set up stable rolling tensile force after, realize that the whole roll coil of strip is rolling.
Apparatus of the present invention can carry out on a multi-roll mill that continuous multi-pass is rolling, and adaptability is strong, and is easy to adjust, and the magnesium alloy thin coiled stock that is fit to different in width is rolling.
Apparatus of the present invention have the draught pressure of reduction and rolling torque, cut down the consumption of energy, and increase pass deformation, improve characteristics such as rolling efficiency height, help the roll coil of strip of difficult distortion such as magnesium alloy is rolled production.
The rigidity of the asynchronous continuous-rolling of unit of apparatus of the present invention is big, and between roll chock, adopts hydro-cushion power system, and rolling thin specification magnesium alloy strip coil also helps reducing the thick poor of the roll coil of strip easily.
The stressed equal and opposite in direction in most of working roll left and right sides of the asynchronous continuous-rolling of unit of apparatus of the present invention; Cancel each other; Therefore reduced roll because of stressed generation deflection to the influence that plate shape is brought, help reducing the lateral thickness difference of the finished product roll coil of strip, also help the production of wide thin coiled stock again.
The asynchronous continuous-rolling of the unit of apparatus of the present invention is realized through the independent transmission of working roll.Each working roll driving motor has speed measuring coder, can accurately measure rotating speed of motor.The asynchronous tandem cold rolling length velocity relation of milling train satisfies through each roll rate of discharge equal principle.The roller speed of asymmetrical rolling can be through each work roll diameter different or each working roll rotational angular difference realize that only compare that to change the reducing friction speed of the speed of rolls through the change work roll diameter more flexible, adaptability is stronger.
The asynchronous continuous-rolling of the unit of apparatus of the present invention is with odd bits working roll deflection milling train horizontal direction center line one side 3～5mm, and even bit working roll deflection milling train horizontal direction center line opposite side 3～5mm.Through the odd bits working roll is amesiality a little, and the even bit working roll makes this device have the rolling accuracy height partially a little to the characteristics of opposite side, and operation of rolling working roll keeps stable characteristics.
Apparatus of the present invention change whole tandem rolling speed through the rotating speed of rationally adjusting each working roll driving motor separately, under the cooperation of uncoiler and coiling machine, realize the tandem rolling Tension Control, guarantee that unit can stable rolling.
Apparatus of the present invention through online raw thickness before being rolled measure with rolling after finished product thickness measure, realize that thickness feedforward and feedback control automatically, have very high thickness and precision to guarantee rolling thin coiled stock.
It is lateral stiffness that the asynchronous continuous-rolling of the unit of apparatus of the present invention has higher roller, and backing roll adopts two roller back lining bearing modes, helps steady operation roller roller system.When rolling, support each other between the working roll, so the roll sag reduces, the roll lateral stiffness increases, and makes the rolling roll coil of strip have good plate shape precision.
Apparatus of the present invention guarantee that through heating of online isothermal and temperature closed loop control accurately band obtains uniform and stable rolling temperature, help increasing reduction in pass, and reduce and occur the limit after band rolls and split the generation with the broken belt accident.
Apparatus of the present invention through online raw thickness before being rolled measure with rolling after finished product thickness measure, realize that thickness feedforward and feedback control automatically, have very high thickness and precision to guarantee rolling thin coiled stock.Through heating of online isothermal and temperature closed loop control accurately, guarantee that band obtains uniform and stable rolling temperature, help increasing reduction in pass, and reduce and occur the limit after band rolls and split the generation with the broken belt accident.Milling train has advanced lubricated reliably and surperficial blow device, can improve lubricating condition greatly, improves mill speed and strip surface quality.
In recent years, along with the user requires increasingly highly to strip material surface quality, plate shape etc., adopt asynchronous continuous rolling device can significantly reduce roll-force; Transverse curvature that also can corresponding minimizing roll; Make year roll gap more even, reduced strip crown, thereby reduced the difficulty of plate shape control.Therefore, the asymmetrical rolling technology can be improved plate shape effectively, makes the superiority of asynchronous rolling process obtain maximum performance.Simultaneously; When adopting asynchronous continuous rolling device rolling; Because having caused to rub with the hands, the existence of its additional detrusion rolls the difference that the upper and lower surface metal in district flows; Cause metal surface quality, metallographic structure, crystal position phase and changes of mechanical properties, help improving the forming property of close-packed hexagonal structure magnesium alloy.This device has good application market scope and prospect.
Description of drawings
Deformed area sketch map when Fig. 1 is asymmetrical rolling,
Among Fig. 1<img file="910395DEST_PATH_IMAGE003.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="20" />With<img file="871397DEST_PATH_IMAGE004.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="18" />Be respectively top roll and lower roll neutral angle;<img file="113023DEST_PATH_IMAGE002.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="18" />With<img file="388146DEST_PATH_IMAGE001.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="17" />Be respectively the linear velocity of top roll and lower roll, and<img file="438142DEST_PATH_IMAGE002.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="18" /><<img file="773308DEST_PATH_IMAGE001.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="17" /><img file="2012102548280100002DEST_PATH_IMAGE005.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="20" />With<img file="33388DEST_PATH_IMAGE006.GIF" he="24" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="17" />Be respectively the nip angle of top roll and lower roll;<i >H</i>With<i >h</i>Be respectively rolled piece inlet thickness and exit thickness; The I district is the zone of slippage on the entry side of top roll, and II and III district are its zone of slippage on the delivery side; I and II district are the zone of slippage on the entry side of lower roll, and the III district is its zone of slippage on the delivery side; τ is the frictional force of rolled piece and roll shop building.
Fig. 2 is the continuous asymmetrical rolling device of the magnesium alloy sheet roll coil of strip:
The specific embodiment
The magnesium alloy strip coil that will be rolled is placed on the uncoiler 1 and wears band after confirming, the tie of band is opened; And start uncoiler and pinch the transfer roller 2 and the first tension force pinch roll 3 through first deflection, the roll coil of strip is delivered to straightener 4 align, through the second tension force pinch roll 5; Get into online heater 6, the roll coil of strip after the heating gets into first calibrator 8 and carries out the supplied materials thickness measure through the 3rd tension force pinch roll 7; The roll coil of strip is through first guide roller 9, behind second guide roller 11, gets into first working roll 12 and second working roll 13 carries out asymmetrical rolling; Warp second guide roller 14 gets into second working roll 13 and the 3rd working roll 15 carries out asymmetrical rolling, through the 3rd guide roller 16; Get into the 3rd working roll 15 and the 4th working roll 17 carries out asymmetrical rolling,, get into the 4th working roll 17 and the 5th working roll 19 carries out asymmetrical rolling through the 4th guide roller 18; Through the 5th guide roller 20,, get into second calibrator 23 and carry out the finished product thickness measure through the 4th tension force pinch roll 22; Pinch transfer roller 24 through second deflection, get into coiling machine 25 and batch, and set up stable tension and be rolled.
Show based on above-mentioned: this device has remarkable reduction roll-force and rolling torque; Reduce required power, improve reduction in pass, improve the strip surface quality; Thickness of slab and plate shape precision are good; Advantages such as crystal grain thinning tissue can realize the production of the different fabric width magnesium alloy strip coil of thin specification product, and product quality is good.
Claims (4)
1. continuous asynchronous rolling process of the magnesium alloy sheet roll coil of strip and device, its characteristic comprises: uncoiler (1); First deflection pinches transfer roller (2); The first tension force pinch roll (3); Straightener (4); The second tension force pinch roll (5); Online heater (6); The 3rd tension force pinch roll (7); First calibrator (8); First guide roller (9); First backing roll (10); Second guide roller (11); First working roll (12); Second working roll (13); Second guide roller (14); The 3rd working roll (15); The 3rd guide roller (16); The 4th working roll (17); The 4th guide roller (18); The 5th working roll (19); The 5th guide roller (20); Second backing roll (21); The 4th tension force pinch roll (22); Second calibrator (23); Second deflection pinches transfer roller (24); Coiling machine (25);
Uncoiler (1); First deflection pinches transfer roller (2); The first tension force pinch roll (3); Straightener (4); The second tension force pinch roll (5); Online heater (6); The 3rd tension force pinch roll (7); First calibrator (8); First guide roller (9); First backing roll (10); Second guide roller (11); First working roll (12); Second working roll (13); Second guide roller (14); The 3rd working roll (15); The 3rd guide roller (16); The 4th working roll (17); The 4th guide roller (18); The 5th working roll (19); The 5th guide roller (20); Second backing roll (21); The 4th tension force pinch roll (22); Second calibrator (23); Second deflection pinches transfer roller (24); Coiling machine (25) is arranged along the direction that penetrates of magnesium alloy strip respectively in proper order.
2. the continuous asymmetrical rolling device of a kind of magnesium alloy sheet roll coil of strip as claimed in claim 1 is characterized in that each working roll driving motor has speed measuring coder; The asynchronous tandem cold rolling length velocity relation of milling train satisfies through each roll rate of discharge equal principle; The roller speed of asymmetrical rolling realizes through each work roll diameter difference or each working roll rotational angular difference.
3. the continuous asymmetrical rolling device of a kind of magnesium alloy sheet roll coil of strip as claimed in claim 1; It is characterized in that asynchronous continuous-rolling passes through odd bits working roll deflection milling train horizontal direction center line one side 3～5mm, and even bit working roll deflection milling train horizontal direction center line opposite side 3～5mm.
4. the continuous asymmetrical rolling device of a kind of magnesium alloy sheet roll coil of strip as claimed in claim 1 is characterized in that backing roll adopts two roller back lining bearing modes, and between roll chock, adopts hydro-cushion power system.
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| CN2012102548280A CN102773255A (en) | 2012-07-20 | 2012-07-20 | Continuous asynchronous rolling device of magnesium alloy sheet strip coil |
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| CN2012102548280A CN102773255A (en) | 2012-07-20 | 2012-07-20 | Continuous asynchronous rolling device of magnesium alloy sheet strip coil |
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| CN105834214A (en) * | 2015-01-16 | 2016-08-10 | 宝山钢铁股份有限公司 | Temperature-controlled rolling equipment for production of metal plate in coils |
| CN106944479A (en) * | 2017-04-18 | 2017-07-14 | 东北大学 | A kind of thin strip single chassis tandem mill and implementation |
| CN110695087A (en) * | 2019-10-17 | 2020-01-17 | 安徽工业大学 | A kind of preparation method of electronic grade low oxygen ultra-high purity titanium ultra-thin ribbon |
| CN113972034A (en) * | 2021-10-27 | 2022-01-25 | 中国科学院电工研究所 | Iron-based superconducting strip and preparation method thereof |
| CN114850239A (en) * | 2021-02-03 | 2022-08-05 | 江苏福镁新材料科技有限公司 | Continuous production system and method for magnesium alloy thin strip coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110695087A (en) * | 2019-10-17 | 2020-01-17 | 安徽工业大学 | A kind of preparation method of electronic grade low oxygen ultra-high purity titanium ultra-thin ribbon |
| CN110695087B (en) * | 2019-10-17 | 2021-11-26 | 安徽工业大学 | Preparation method of electronic-grade low-oxygen ultrahigh-purity titanium ultrathin strip |
| CN114850239A (en) * | 2021-02-03 | 2022-08-05 | 江苏福镁新材料科技有限公司 | Continuous production system and method for magnesium alloy thin strip coil |
| CN113972034A (en) * | 2021-10-27 | 2022-01-25 | 中国科学院电工研究所 | Iron-based superconducting strip and preparation method thereof |
| CN113972034B (en) * | 2021-10-27 | 2024-03-12 | 中国科学院电工研究所 | Iron-based superconducting tape and preparation method thereof |
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Application publication date: 20121114 |