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When the work rolls are rotating with a peripheral speed,at some
point in the roll gap,the peripheral velocities of the roll and the
workpiece are equal.This point is known as the Nuetral Point.To the
left of this point,the surface velocity of the metal is lower is
than the roll peripheral velocity.This difference in speeds
produces friction between the metal and the rolls which tends to
draw the material in the roll gap.To the right of the nuetral
point,the metal velocity is greater than the roll peripheral
velocity,so the friction tends to retain the metal in the
roll.Learning's from AIST Course, US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Since all the rolls are elastic, some deformation of the rolls
occurs during rolling.Arc of contact is lengthened for the same
draft when compared with a rigid roll.Planes of entry and exit are
shifted outward from the centerline of the rolls.
Stress less ZoneSlipping ZoneWork Hardened ZoneLearnings from
AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Strip Widening Phenomenon..Whenever a strip undergoes a
reduction, there is always a tendency for the strip to undergo
spread in lateral width.This spread in lateral width is also a
reason why we cant have excessively large reductions in the
strip.Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
-
Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Exit strip thickness depends on Mill characteristics
Strip characteristics
Exit strip thickness can be determined by finding intersection
of Mill elastic deflection and strip plastic curveLearnings from
AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
-
Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
-
Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
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Learnings from AIST Course,US Goel-FPTG*
Learnings from AIST Course,US Goel-FPTG
*