|
SLITTER TOOLING
OVER ARM SEPARATORS
In any slitting line, there is an uncoiler, slitter head and recoiler. After
slitting,
many strands come out of the slitter head. These stands are to be coiled
separately,
neatly so that their edges are protected and packing, dispatch to actual
user becomes
easy and productive; for which OVER ARM SEPARATORS are used. These over arm
separators
are mounted on a separate shaft which is lifted hydraulically as the narrow
width coils
keep winding. Over Arm Separators separate the narrow coils. Because of
separators the
total width of slitted coils is more compared to wide width coil which is
called Fan Out.
If number of strands are more, fan out is more. Generally, the face of
recoiler is kept
off set by 1” from slitter face so that fan out on both sides from centre is
equal.
Over Arm Separator Disc is an important item of Slitting Line Tooling.
Slitted coils will
be nicely wrapped and packed without spoiling edges if Over Arm Separator
Discs are of
good quality.
Over Arm Separator Discs are subjected to heavy wear and impact. Hence raw
material
should be wear resistant and shock resistant.
SLITTING LINE TOOLING
1. FLATNESS
2. PARALLELISM
3. PERPENDICULARITY
4. CONCENTRICITY
FLATNESS
Flatness is also known as warpage. Flatness means total dial indicator
reading while
putting slitting cutter on surface plate below dial indicator. Flatness is
the peak
height of any point of the cutter from the surface plate minus actual
thickness of
slitting cutter.
In slitting line, flatness causes slitting knife to dance on arbor. If
flatness is F then
horizontal clearance of the knives will vary between (HC-F) & (HC+F) during
every
rotation of knife.
PARALLELISM
It is total variation of thickness in a knife/ spacer. It can be easily
measured with the
help of double probe comparator or micrometer. A knife though parallel may
not be flat
and in that case slitting performance will be adversely affected.
Parallelism of each and every knife and spacer is important and should be
within 50% of
thickness tolerance.
PERPENDICULARITY
In a slitting knife, bore should be square to face. In case of spacer it is
not important
because bore of spacer is generally loose on arbor.
Slitting Knife is mounted on slitter arbor on bore. Bore and face of slitter
knife should
be ideally square to each other so that knife runs perpendicular to slitter
arbor.
CONCENTRICITY
Concentricity is the difference between centre point of O.D. of arbor and
centre point of
bore of slitting knife. Theoretically this should be zero. This causes
variation in
vertical clearance of slitting knife as cutter tends to move eccentric. If
concentricity
is “C” then knife will move up and down by 2C.
CONTACT
US FOR QUOTES
OTHER ARTICLES
NON
DESTRUCTIVE TESTING OF COLD ROLLING MILL ROLLS
SUB ZERO
TREATMENT (Reduction in Retained Austenite)
TUBE CUT OFF KNIVES
TIGHTER
MANUFACTURING TOLERANCE FOR ROTARY
CUTTER,
SLITTING KNIFE AND SPACER.
CRYOGENIC
TREATMENT
HINTS & TIPS ON THE APPLICATION OF
SLITTER TOOLING
GUIDELINES
FOR RAW MATERIAL SELECTION FOR SLITTING LINE TOOLING
SHEAR BLADES AND MACHINE KNIVES
PRECAUTION & ORDERING
TIPS FOR FRICTION SAWS
FINS AN IMPORTANT
COMPONENT OF TUBE MAKING
IMPORTANT FACTORS
IN COLD ROLLING MILL ROLLS
DEE TEE FORGES YET AHEAD IN SEARCH OF
EXCELLENCE |
