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
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
We talk about Roll frame or Stand, we are actually referring to a pair of Roll , Roll supported by Friction bearing and antifriction bearings and bearing supported a chock and chock supported in housing and chock slide within Housing and chock open and close by screw Example:- Grooves pass available in both Roll top and bottom and some Roll gap available between two Roll , it is called nominal Roll gap https://svinaykumar1987.blogspot.com/2021/08/roll-pass-design-for-continuous-bar-mill.html Passes & section Rough passes It Roll stand have big groove passes as Rectangulars, Boxs, Diamonds etc. Example:- Intermediate passes It stand have mediums grooves passes as Ovels , Rounds Example:- Finish passes It stand have small passes as flat, Rounds, Slit passes Example:- Passes deformation As Ovel to round, round to ovel , ovel to flat etc
Basic knowledge of Rolling Mill We are explaining type of Rolling Mill There are five types of Rolling Mill 1- 2- 3- 4- 5- Reversing rolling mills and three high rolling mills are part of hot rolling and four high mills , cluster mills and Tandom mills are part of cold Rolling mills We will explain step by step all pass , stand and All doubts
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