Roll Pass Design – IspatGu Jun 18, 2014 Roll Pass Design satyendra; June 18, 2014; 1 Comment ; Long products, roll grooves, Roll pass, Roll pass design, rolling mill, rolls, sections,; Roll Pass Design Long products are normally rolled in several passes, whose numbers are determined by the ratio of the initial input steel material (square or round billet or bloom) and ,
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Get More6 Rolling Mills Revamp: Roll Upgrades for Extreme Loads Figure 5: Roll load and ﬁllet radius detail Case Study – Existing Solution and Problem Description This application is performed on rolls of 2-HI mills, but could be extended to the back-up rolls of 4-HI mills Figure 5 shows the roll load and current ﬁllet radius detail
Get MoreThe rolling process is shown in Fig 21: Rolling is done both hot and cold It is accomplishes in rolling mills A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc Rollers may be plain or grooved depends upon the shape of rolled product
Get Moretension, speed Roll force, torque, temperature CVC, HS, position bending Coil-data Operator-trims Scheduling 400 350 300 250 200 150 100 50 0 0 05 1 15 2 Log deformation Yield stress 3542 Rolling mill applications covered by ABB include Single and multistand Mills Cluster and Sendzimir*) Mills Inline and continuous rolling mills Reversing
Get MoreHOT ROLLING PRACTICE – An Attempted Recollection1 HOT ROLLING PRACTICE – An Attempted Recollection Saral Dutta B Tech (Hons), IIT Executive Director, ISP & RMD, SAIL (Retired) Rolling is a metal forming process in which metal stock is passed through a pair of rolls There are two types of rolling rolling mill speed calculation formularolling mill speed ,
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Get Moreroll mill high speed vsi crusher bbfinistrella rerolling mill roll speed formula Consider two high roll mill as shown in the figure For one revolution of the top roll the resultant rolling load P moves along the circumference of a circle equal to 2πa Since there are two work rolls involved, the work done is equal to Work done =2 (2πa)P = 4Pπa If N is the speed of rotation of the
Get More– Calculate roll separation force (“rolling force”) and torque – Processing Limits – Calculate rolling power Prof Ramesh Singh, Notes by Dr Singh/ Dr Colton 13 Flat Rolling Analysis • Consider rolling of a flat plate in a 2-high rolling mill
Get MoreRoll neck bearings Conditionsgoverning design 4 Four-row tapered roller bearingsor a pair ofsphericalroller bearings generallyare loose-fitted on a cylindricalrollneck Thusthe chockscan be easilyremoved; however, the field ofapplication of these bearing typesislimited due to the unsuitabilityofloose fitsfor high-speed rolling
Get More19-05-2020· Rerolling Mill Roll Speed Formula Home; Rerolling Mill Roll Speed Formula; Rolling (metalworking) Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal .
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Get MoreOnline roll pass design software for rolling mills and front of 13,000 hp variable speed motor on the hot mill Read more Get Price rolling mill startup torque calculation stone crusher , Rolling mill speed calculation formula pdf Calculating roll force and torque 132 Effect of rolling speed on the supply aluminum hot rolling mill .
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Get More25-02-2016· If a mill rolls 80 % of the calendar year, that is 365 x 24 x 080 = 7008 hours If the mill rolls 800,000 tons per year, it runs at an average production rate of ,
Get MoreConsider two high roll mill as shown in the figure For one revolution of the top roll the resultant rolling load P moves along the circumference of a circle equal to 2πa Since there are two work rolls involved, the work done is equal to Work done =2 (2πa)P = 4Pπa If N is the speed of rotation of the rolls then
Get MoreRolling mills Rolling mill consists of rolls, bearings, structure, or housing for rigidly supporting these parts, power drive, power transmission system, speed control, roll gap adjusting set up, etc The force for rolling generally is very high The power requirements are very high Hence initial capital investment is high
Get Morepressure and time Thus, prediction of paper compression in rolling nips is not simple To accomplish this, empirical expressions have been developed from platten press data for pressure and time, and these have been converted to speed and loading in the “calendering equation” developed by Kerekes and Crotogino and shown in Figure 7
Get Morerolling mill speed calculation formula There are forty years of manufacturing history, with three major production bases,over 160 senior R&D engineers and 600+ large and medium-sized digital processing equipment, The first-line technicians and professional after-sales service personnel up to 2,300+ and 200+ respectivelyIntroducing advanced technology and craftsmanship, ,
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Get More21 Experimental set up A Hille-100 rolling mill with rolls of 225 mm diameter and 254 mm length, driven by a variable speed DC motor of 75 horse power, was used The maximum rolling force, torque and speed are 1500kN, 13kN-m and 70 rpm respectively The sensor roll nitrided surface hardness is 65 to 70 HRC
Get More21 Experimental set up A Hille-100 rolling mill with rolls of 225 mm diameter and 254 mm length, driven by a variable speed DC motor of 75 horse power, was used The maximum rolling force, torque and speed are 1500kN, 13kN-m and 70 rpm respectively The sensor roll nitrided surface hardness is 65 to 70 HRC
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Get More27-06-2018· Nd – No of delvieri Production in kgs / hr ( L x 10936 x 60 x effy ) / (hank (Ne) x 36 x 840 x 22045) L – delivery speed in m/min effy- efficiency Ne – English count ( number of 840 yards in one pound) 840 – constant 22045- to convert from lbs to kilograms assorted spinning spinning formulas unit measurement yarn count
Get More• Roll gap L • Surface speed of rolls V r , The roll radius is 300 mm, and the rolls rotate at 100 rpm Calculate the roll force and the power required , FOUR HIGH ROLLING MILL PROBLEMS AND DEFECTS IN ROLLED PRODUCTS Porosity, Cavity, Blow Holes occurred in the cast ingot will be closed up during the rolling process
Get MoreThe roll mill is the simplest batch mixing equipment The principal design consists of two horizontal rolls, usually of equal size, arranged side by side and rotating toward each other at different speeds The ratio of the peripheral speeds of the rolls, known as friction ratio, ranges from 1 to 2 but is usually around 12
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