Roll pass design about draft

We will explain What is draft in Rolling pass design
Draft is the Reduction in section height , when section entry in Roll pass and section exit from Roll pass  or which section Reduce between entry height and exit height  that is called draft 


hin - hout = Da = ∆h
hin    = entry height of stock ( section) 
hout =delivery height of stock ( section) 
D      = abusulet draft

Percentage(%)Draft between entry heigh of stock and delivery height of stock 

Dr = percentage (%) draft 
[(hin - hout)/hin] × 100 = Dr


 

Comments

Post a Comment

Popular posts from this blog

Section Areas in Rolling Mill

Image
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 
Read more

Rolling mill Roll pass design ( Reduction )

Image
Reduction Reduction is the reduce in area from stand pass to stand pass and it manifested as a percentage of the entry stock area  [( A in - Aout) / A in ] × 100 Average reduction of whole mill calculate by it formula [1- 1/ (√n( A in / A out ) ] × 100 = R ave  Reduction and elongation  calculated by following Formula [1- ( 1 / E )] ×100 = R  General reduction and elongation [1- ( 1 / E ave)] × 100 = R ave
Read more