analysis of thin strip profile during asymmetrical cold rolling with roll

Analysis of Thin Strip Profile during Asymmetrical Cold Rolling with Roll Crossing and Shifting Mill Article PDF Available · February 2014 with 97 Reads How we measure reads

Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling Abstract In order to analyze the effects of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile extensive tests were carried out on a 4high rolling mill equipped with a work

Throughout rolling the strip profile is controlled by using the advanced shape control rolling mill such as the combination of work roll crossing and shifting during asymmetrical rolling the one of the valuable methods to control the strip profile quality in rolling process

In the paper finite element model of strip shape during cold rolling of thin strip in asymmetrical rolling case was successfully developed and the strip shape such as the thickness distribution along the strip width have been obtained

This finite element model considers the asymmetrical rolling parameters such as variations in the diameters of the rolls and the crossing angle as the work roll shifts on the strip during cold rolling The shape and profile of the strip are discussed in the asymmetrical and symmetrical rolling conditions while the total rolling force and

An analytical model for general asymmetrical cold rolling is proposed to investigate the behavior of sheet during asymmetrical rolling using the slab analysis Neutral points between the upper and lower rolls and the strip rolling pressure distribution along the contact interface of the roll and strip and rolling forces as well as rolling torque can be calculated easily using this model

The exit strip profile for thin strip in cold rolling of aluminum was studied The effects of work roll cross angle work roll shifting reduction ratio and rolling speed were investigated The following conclusions can be drawn i Significant improvement was observed with an increase of WRC angle and WRS value which resulted in a better strip profile reduced strip thickness and a drop of rolling force

Cold rolling reduction is an important factor that affects drawability of IF steel It has been observed that increasing cold rolling reduction increases the r m value at least up to 90 34This effect has been shown in Fig s the most important parameters in the production of a strong 111 recrystallization texture are the annealing temperature and the time of holding 35

To analyze and solve the problem of singleside long edge of hot rolled strip in certain domestic factory the asymmetrical deformation of rolls and strip in asymmetrical stiffness mill stand based on slit beam model the strip profile and rolling force distribution at the exit of asymmetric stiffness stand mill were calculated using influence

Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill Abstract Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers

CiteSeerX Document Details Isaac Councill Lee Giles Pradeep Teregowda Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill

Rolling metalworking In terms of usage hot rolling processes more tonnage than any other manufacturing process and cold rolling processes the most tonnage out of all cold working processes Roll stands holding pairs of rolls are grouped together into

A Study on the Effects of Coil Wedge During Rewinding of Thin Gauge Metals 2011Browse all Theses and Dissertations 472 When cold rolling thin metal strip or sheet containing asymmetric thickness profile quality problems such as poor related flatness for strips with asymmetric thickness profile during the rollingwinding processes

1 Introduction Thin strip has a wide application especially in the electronic and instrument industries Cold rolling of thin strip such as within a thickness range of 01–015 mm is a challenge in rolling practice which involves the control of the strip dimensional accuracy the strip shape and profile the flatness and the surface finish

For the dimensional analysis of frontend bending the SI base One can see the bending of the plate towards the upper roll and the asymmetric distribution of the slabs velocities over the roll gap An experimental study of the effect of rollspeed mismatch on the rolling load during the cold rolling of thin strip Journal of Mechanical

from rolling is computed with strip plastic deformation and roll elastic deformation taken into account and the outof bite stress map is examined for buckling in the same model The stress redistribution due to buckling is a result of this analysis and the effect on the whole system can be studied

When cold rolling thin metal strip or sheet containing asymmetric thickness profile quality problems such as poor final flatness surface imperfections and strip defects are difficult to address

Analysis of thin strip profile during asymmetrical cold rolling with roll crossing and shifting mill Abstract Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers

A rolling simulator for the Cluster Mill especially the 6Hi X and 10Hi X type mills besides the conventional 4high mill has been developed for evaluation of rolling thin strips and foils The evaluation includes roll deflection pressure of rolls in contact roll

Flat Rolling Analysis Results – without front and back tension p p µp µp σ σ x x dσ x Stresses on Slab in Entry Zone Stresses on Slab in Exit Zone p p µp µp σ σ x x dσ x Using slab analysis we can derive roll pressure distributions for the entry and exit zones as h 0 and h b are the same thing 2tan1 ff RR H hh − φ 0 0 2

rolling force roll pressure the deflection of work roll and backup roll and the strip thickness lateral distribution are scattered by the numbers distribution To analyze the deformation of rolls distribution of force and rolled strip profile a calculation was made by using a software coded for asymmetrical deformation of roll series 810

An essential quality characteristic in the cold rolling sector is the minimum thickness deviation that can be achieved at final gauge ie from the finishing pass However the need to maximize productivity requires that tight thickness tolerances have to be achieved even under suboptimal mill and entry strip

Aug 23 2012 · Among cladding methods the cold rolling is most widely used in producing bimetallic sheets In this research to thoroughly provide guidelines for cold rolling of bimetal strip an attempt has been made to develop an analytical model based on upper bound method

Design and function of CVC rolls as a flatness actuator in a cold rolling mill Keywords Flatness actuators CVC cluster mill cold rolling strip Summary When cold rolling thin steel strips with high tensile strength reversible cluster mills are used The customer’s demands are high on the products flatness which is controlled by the

STRIP CROWN PREDICTION DEVELOPING A REFINED DYNAMIC ROLLSTACK MODEL FOR THE HOT ROLLING PROCESS Derek E Slaughter Abstract The steel industry has been producing flat plates through the process of hot rolling since the late 1600s Hot rolling uses a series of rolls to progressively thin a strip of steel to a desired thickness

Coldrolled sheets and strips come in various conditions fullhard halfhard quarterhard and skinrolled Fullhard rolling reduces the thickness by 50 while the others involve less of a reduction Cold rolled steel is then annealed to induce ductility in the cold rolled steel which is simply known as a Cold Rolled and Close Annealed