This blog provides Rolling Mill included Guide Shop, Work Shop , Roll Shop , Production Knowledge And Roll Pass Design By Vinay Kumar Verma ( Production Engineer)
Roll Pass Design( today we will explain three high rolling mill stand )
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Three high rolling mill stand have three roll - Top , Middle and bottom.top and bottom roll rotate always same direction and Middle roll rotate opposite direction
Example:- three high rolling mill
Roll connect with pinion gear box and gear box connect to electric motor
How to calculate section weights 1:- Billet weight = Side × Side × Density × Lengths 2:- Over weights = a × b × 3.1428571429 = Area Area × Density = Weight 3:- Round weight= πr^× Density = Area × .00785= weight
Section Area 1:- Square Area = Side × Side 2:- Ovel Area = a × b × 3.1428571429 https://svinaykumar1987.blogspot.com/2021/09/roll-pass-design-number-of-passes.html 3:- Round Area = 3.1428571429 × r × r https://svinaykumar1987.blogspot.com/2021/08/roll-pass-design-for-continuous-bar-mill.html 4:- Rectangular Area = L × W
Today we will know about Reversing Mills 1- Reversing Rolling Mills( Two High Rolling Mill) Reversing mill have two Roll and roll assemble in a frame it is called stand . We divide stand in three type https://svinaykumar1987.blogspot.com/2021/08/roll-pass-design-for-continuous-bar-mill.html 1- Roughing Stand 2- In termediate Stand 3- Finishing Stand All stand have same work Roll Daimeter and roll length Can be Big or small according to section and section temperature should be 1200 to 900 degrees according to section size
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