冷轧板带钢课程设计( The curriculum design of cold rolledstrip )University of Science and Technology Liaoning curriculum design manual A design rate of 0.75 * 1500mm cold rolled sheetRate of material and metallurgy.Professional rate of material forming and control engineering 09-5 Name rateTeachers rateSuccess rateCatalog1Overview:...:...1.1the concept of cold rolling... And the following:...1.2advantages of cold rolled strip steel:...1.3characteristics of cold rolling technology:...2specifications and processes:2.1specifications: ....... and the following:...2.2cold rolled sheet production and process:...3rolling schedule formulation:...::...3.1pressure down system:...3.2tension system:...:...3.3speed system:...:...4Calculation of rolling force:...:...5equipment strength and capacity check:...5.1bite capacitycheck ..................................................................... (10)5.2roller strength check:...:...5.2.1work rollcheck ..................................................................... ....... Undefined bookmark error rate.5.2.2supporting roll checking:...:...5.3contact stress check:5.4motor power check:5.4.1rolling torque:...:...5.4.2friction torque:...5.4.3idling moment...:...6Summary:... And the following:...1in the process of the review of steel by forging or castingin addition to a small number of methods such as direct outside the timberAbout 80% of the remaining products are rolled. And the production process of cold rolled strip to avoid heatThe disadvantages of existing in the rolling temperature and the temperature uneven division can produce thinner and more precise sizeMake sure that the surface is smoother and the plate shape is more straight.The curriculum design of the cold strip rolling schedule is referred to the 1# line of Anshan Iron and steel cold rolling mill. Pre EngineerStandard Specification for cold rolled sheets of 0.75 * 1500mm. The design of cold-rolled production characteristics and mainworkThe order is simply introduced and established the system of the rolling rolling force calculation of the strength of the roller, electricThe machine power is checked. 1.1 cold rolling concept cold rolling is the rolling process of metal under recrystallization temperature. In cold rolling,metals do not contract againBut the crystal hardening phenomenon will occur. 1.2 cold rolled strip in 1 in the advantage of smaller thickness can sheet production2in the strip along the direction of the length and width of the plate thickness can obtain better shape uniformRoll surface hardness by 3 in the cold can obtain good surface quality of the surface finish1 of the products from4 the strip after cold rolling after heat treatment different mechanical properties of the products can be different. The main technical characteristics of 1.3 cold rolling and hot rolling compared cold strip production has three main features included1 of the work hardeningDueto work hardening makerolling process of metal deformation resistance increases with the increase of rolling pressureWhen the metal plastic will be low prone to brittle fracture.When a violent process of steel hardeningDegree is related to the deformation degree of cold rolling.Whenthe deformation of ambassador hardening exceeds a certain degree is notCan continue rolling?. Therefore strip subjected to certain cold deformationamount after often need softHeat treatment in recrystallization annealing or solid solution treatment to restore the plastic to reduce resistance to theContinuous rolling. The production process of every two times the softening of the complete heat treatment between the cold work often referred toFor a "rolling" process". Required in the rolling process under certain rolling condition steel hard thinner is finishedThe more.2 the process of cooling and lubricationSevere deformation heat and friction heat generated in the process of cold rolled strip and rolls temperature should beEffective artificial cooling shall be used. The rolling speed is higher the greater the amount of pressure cooling problem is more seriousTo. How to reasonably strengthen the cooling becomes an important subject of developing modern high speed cold rolling mill.The main function of the cold rolling process lubrication is metal deformation resistance decreases which not only helpsTo ensure the realization of greater pressure on existing equipment capacity under the condition of but also can makethe mill to economyFeasible to produce products of smaller thickness. In addition adopts the effective lubrication technology of cold rolled over directlyThe heating rate of the process and the temperature rise of the roller play a good influence. In some varieties process run rollingThe utility model can also prevent the metal sticking roller from slipping.The lubricating effect of cold rolling quality is an important indicator to measure the emulsion lubricant requirements are includedWhen the flow of spray and roll surface is can effectively absorb heat and guarantee on the surface of the oil atAgent at a faster speed uniform from the emulsion and segregation of adhesion in surface and the roller surface can formThe oil film thickness uniformity.The 3 tension rollingThe so-called tension rolling is that the rolling deformationof the workpiece is in a certain front tension and back tension2 with the implementation of. The main function of the share of tensionThe strip in the rolling process to prevent deviationThe rolled strip flat and shape goodTo reduce the deformation resistance R for rolling thin productIt can adjust the load of main motor of cold rolling mill properly.2. specifications and process 2.1 specifications according to Anshan Iron and steel cold rolling line 1700 continuous rolling mill design1, using four high mill, five stands continuous rollingLa 1 in the work roll diameter is observed in mmR 520~600 sharePhi Phi 600 mm selectionIn the 2 increase support roller diameter increase 1400~1526 in mm share Phi Phi 1500 mm R selection.2, the finished size 0.75 x 1500 mm share3, raw material specifications1 in the selection of Q215 steel increase shareAccording to the empirical data in the 2 La r materials selection for strip size 2.75 x 1550 mmvolume. 2.2 cold rolled sheet production and process of cold rolling production process of shareHot rolled coil material: acid washing, cold rolling, annealing, leveling, finishing, packing and warehousingThe process is shown in Figure 2-1 share3Figure 2-1 cold rolled strip process flowThe raw material rate of hot rolled plate Volume exergypicklingCold rollingsolution clearAnnealingSmoothannealingSmoothDecarburization annealingFinished annealing crossInspection of shear and longitudinal shear heavyRoll horizontalCut plating tinOrdinary deep drawing plate stretchheat flatComplete silicon steel sheet Continuous galvanized tile ridgemachineGroup transverseShear coatingMachine platingzincPlate coatinglayerAcid platewashheatbeltSteel hardening and alkalisAcid washingInspection and cleaningQuenching, alkali and acid washingSmoothshearStraighteningpolishingStainless steel plateContinuedplatingtin43 rolling rules set 3.1 pressure system according to the principle of rolling force by distributing the pressure coefficient to total pressure exergy as shown in table 3-1 in rolling under the weight of sigma deltaH is the exergy pass reduction of delta hi inDelta hi=bi sigma delta HIn Bi - press distribution coefficient in theTable 3-1 distribution coefficient of cold rolling mill Rack countPress down the distribution factor Bi pass number 1234520.7, 0.330.5, 0.3, 0.240.1, 0.3, 0.2, 0.150.3, 0.25, 0.25, 0.15, 0.05The first time in b1=0.3 sigma delta h=2.75-0.75=2mmDelta h1=b1 Sigma h=0.3 * 2=0.6mmH1=H1- Delta h1=2.75-0.6=2.15mmH1= (h1+H1) /2= (2.75+2.15) /2=2.45mmEpsilon 1=, Delta h1/, H1 * 100%=0.6/2.75 * 100%=21.8%The other calculations are the same as aboveAccording to the calculation results of exergy depress rules as shown in table 3-2Table 3-2 press down scheduleRollingmachineHIn the MM rateH(mm) HIn the(mm) H(mm)E (%)12.75, 2.15, 0.6, 2.45, 21.8 22.15, 1.65, 0.5, 1.90, 23.331.65, 1.15, 0.5, 1.40, 30.341.15, 0.85, 0.3, 1, 26.150.85, 0.75, 0.1, 0.80, 11.853.2 unit tension tension system according to the experienceof the first time after the exergy tension, fifth times before the tension between 30-50 in the exergyTwo to fifth times the front tension is greater than the back tension 5-10. So the tensile stress distribution follows from the frameTable 3-3 tension distribution of each frameRack number12345Front tensionThe MPa 9010010410850Post tensionThe MPa30901001041083.3 when the rolling speed system to ensure the normal rolling condition is included in the strip rolling line of each frame of the second flow is from equal exergyB1h1V1=B2h2V2=B3h3V3=B4h4V4=B5h5V5 in B from H - the width of strip thickness of strip rolling V - level speedIn the process of rolling spread from exergy is ignoredH1V1=h2V2=h3V3=h4V4=h5Vs5elects the last rolling mill export rate of 20.00m/s is based on experience from exergy valueH1V1=h2V2=h3V3=h4V4=h5V5 V4=V5h5/h4=20.00 * 0.75/0.85=17.65m/sV3=V5h5/h3=20.00 x 0.75/1.15=13.04m/s V2=V5h5/h2=20.00 x0.75/1.65=9.09m/s V1=V5h5/h1=20.00 * 0.75/2.15=6.98m/sTable 3-4 horizontal speed meter of workpieceRack number 12345Speed V (m/s) 6.98, 9.09, 13.04, 17.65, 20Using the forward slip value calculation of roll speed fromThe first time yesterdayBite angle from exergyIn the rate in the 2.56 rate) rateSix hundred0.6A, R, C, C, O, s (1)DDelta HArccos (1 alpha)6 exergy neutral angle 0.016)One thousand and eight hundred point zero eight two3.142.56(1One thousand eight hundred and two (13.142.56)2FAlpha(1Two AlphaThe gamma In"In the 300The forward slip value in eluded 0.036 2.15 0.016RHGammaS22The H"TheIt included 6.74 m/ s0.03616.98S1VVHOneThe 1ExergyTheExergyThe 214.6r/m in0.63.14Six point seve n four six zero PI D60 VThe N1The "Other times the calculation process record the resultsas show n in the followi ng table in cludedTable 3-5 rack speed metersA number in the degree.Y ShV (m/s), V (m/s), n (r/min)12.56, 0.016, 0.036, 6.98, 6.74, 214.622.34, 0.012, 0.026, 9.09, 8.86, 282.232.34, 0.012, 0.038, 13.04, 12.56, 40041.81, 0.011, 0.043, 17.65, 16.92, 538.9Calculation of the frame friction coefficient first consider exergy bite after injection so take 0.08 51.05 0.007 0.019 20 spray milk 19.62 624.84 rolling forceTake 0.05 of the solution.This design uses M.D.Stone formula to calculate the average unit pressure exergy rate in QKX1eInPXTheType of exergy HF L 'The X from 2HHHExergyThe. L'- roll flattening degeneration zone length K - plane deformation resistance from S sigma considerationThe Q - 1.15K; the average value of 2 before and after tension QQQ21 exergyIn the Q1 - Q2 - Zhang Li tensionThe first pass rate of 7Occlusion rateIn 2 752. 752. 75HHH000 rate in the in the epsilon in the rate in the 001 inthe rate of 21.8%2.752.152.75HhH epsilon in the 13.1%21.8%0.60.6 epsilon 0.4 epsilon epsilon sigma 10 "in the" exergyFig. 4-1 work hardening curve of Q215 steelAccording to the carbon content in the typical Q215 products from the work hardening curve corresponding to those found included s s value increase rateLa =376MpaFind the average unit tension: 60MPaTwoNine thousand and thirtyThe QExergyThe 432.Arccos (1 alpha)And Tan betaThe f get theThe 57A R C T "the 4. a n 0. 08A r c t a n f betaBecause ofIn the the 4.57 beta 2.56 "so the first alpha mill can realize smooth strip bite the exergy10 pass reducti on is less tha n the first in so smoothly bite.5.2 Roll Stre ngth Check Table 5-1 allowable stress of rollAllowable stress[sigma] (MPa)Allowable con tact stress[Sigma 1] (MPa)Allowable shear stress[R] (MPa)Allowable con tact shear stress[1] (MPa) 240240073730Table 5-3 dimensions of each part of the rollRoll lengthLs rateMm exergyRoll diameterD mm exergy ratePress down the screwsHeart distance LExergy rate mmRoll diameter lengthL mm exergy rateRoll neck diameterD mm exergy rateWork roll 17006001997297330Backup roll 170015002443743825The size of each part of the roller is calculated as followsThe work roll roll diameter 600mmThe Dg rate in roll length1700mmLs rateThe diameter of the work roll diameter 330mm 6000.550.55 D~ (0.5dgg) occlusion rate exergy rate The length of the work roll diameter 297mm 3300.91.0 d~ (0.83lgg) occlusion rate exergy rate The 1997mm from the center of the screw work roll TwoTwo hundred and ninety-sevenTwoTwo hundred and ninety-sevenOne thousand and seven hundredTwoLLLLggG rateIn in in in the occlusion rateThe support roll roll diameter 1500mmThe Dz rate in roll length1700mmLs rateThe diameter of the support roll diameter 825mm 15000.550.55 D~ (0.5dzz) occlusion rate exergy rate Support roll diameter length of the 743mm8250.91.0 d~ (0.83lzz) occlusion rate exergy rateThe 2443mm from the center of the rolling bearing screw TwoSeven hundred and forty-threeSeven hundred and forty-three One thousand and seven hundred TwoLTwoLLLzzZ rateIn in in in the occlusion rate. ElevenTable 5-4 check relevant parameters Rack numberRolling pressureIn the KN rateRoll speedIn the r/min rateMotor powerIn the KW rateFront tensionIn the MPa ratePost tensionIn the MPa rateTension before and afterThe difference in the rate of MPa110945.91, 214.605500903060212904.99, 282.2055001009010319762.45, 400.0055001041004 420954.85, 538.9055001081044 517282.23, 624.8455005010858According to the rolling five stand cold rolling force is considered now onthe fourth roll rolling mill of exergy is checked inFour roller supporting roll and work roll mill bearing moment ratio is equal to four times the diameter ratio of bending shall be in exergyDistribution and moment like PPgz g, exergyZPP39Six hundredOne thousand and five hundredDDMM4FourGZLaIn theFromExergy The Exergy LaLaIn the FromExergyTheExergyPPPgz =20954.85KN will get 537. in exergy exergy 30kn 3920954.8553PPg20417.55kn537.3020954.85pppzz图p.5 - 1四辊轧机轧辊受力图12 521工作辊校核1 辊身假定工作辊放在两支点上画出其弯矩图如下如上弯矩图工作辊在其中间部位产生最大弯矩如上面计算167.50kn81.541997537.308b48 1.51,66 6uud由于水平张力差导致的弯矩为55.49kn15500.851041550L 15108t 167.63kn •m 6.59kn •m167.50kn •m13 m6.59kn1.7255.49 8b412t8 1.5辊身中部的合成力矩为Ill 167.63kn6.59167.5mmm222g2g1工作辊在最大重车后的直径d - 570mm因此辊身中部的最大弯曲应力为9. 0 5 m p a0. 5 70. 11 6 7. 6 3wm(T 3gg(T所以工作辊辊身符合要求•2辊头辊头采用万向接轴辊头由于工作辊传动校核辊头扭转强度. 辊头直径590w106001 Odd 10)(odd 11 取辊头长度354mm0. 0. 6) {.I “ ({). Sull 取m9 7. 4 phaTnaceLiticcds n 5 38. 905 50 09 54 9nP10, 56mpa9 54 9m 0.3540.208 97.460.208amwmT 33nnnd a所以辊头符合轧制要求5.2.2支承辊校核d a图5 - 3 工作辊辊头图141辊身由上图可知在辊身中部产生最大弯曲力矩其大小如上面所求m8131.29k n81.742.44320417.558l pmzzz z支撑辊在最大重车后的直径为d - 1425W1则辊身中部的最大弯曲应力为契* lOmpa1.4250.18131.290.1dm(T 3z3zSo the exergy to meet the requireme nts of support ing roller.2 rate roll n eck3792.56KN0.743TwoTwenty thousand four hundred and seventeen point five five L FourPMzZD 67.54MPa rate rate rate of exergy0.8250.1Three thousand seven hundred and ninety-two point five six 0.1DM33 SigmaDDDD rateThe exergy in the occlusi on rate rateSo to meet the requirements of the rolling roll neck of exergy.5.3 con tact stress check work roll and backup roll con tactsurface con tact stress it will affect the life of exergy exergy of rolli ng roll should beCheck. Con tact stress calculati on using Hertz formula in152One hun dred and twenty-oneTwoTwenty-oneM a XRRK (K PI)RQ (R)SigmaIn theIn theExergyLoad the contact surface of unit length type in Q Two1R, R -- the radius of contact between two rolls Two1, KK coefficient related to the exergy of roll material OneTwoOne 1 PI E1.KRate2 exergyTwoTwo2 pi E1.KRateExergyRoll the same material =0.3 E=200GPa exergy exergy exergy exergy of r1=300mm r2=750mm /m12326.38KNOne point sevenTwenty thousand nine hundred and fifty-four point eight fivePExergy exergy exergy of 1417.79MPa Q0.750.30.75) (0.3102001012326.38)0.418 sigma 33Max exergyExergyIn the exergy exergy exergy exergyIn the exergy < Sigma431.01MPa1417.790.3040.304 sigma tau MaxMaxExergy exergy exergy exergy in the tau.So when the rolling strip mill with exergy requirements. 5.4 motor power check5.4.1 rolling torque M3.06KN109.49537.300.32l2xPM3From GZExergy exergy exergy exergy exergy exergy exergy rateThe X will take 0.3 of the exergy coefficient of lever arm gP- the L - rolling pressure contact arc length. 5.4.2 friction moment M8.8 7K 50.3353 N0.0 7.3 0fdPM1ggm1 from exergy exergy exergy exergy exergyM。
