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Billet Grinding is the
conditioning of billets, blooms, slabs and ingots in
large and medium size steel industries to remove defects
such as surface cracks, seams, pin holes, slag patches
etc. The advantages of this operation are reduced cost
and higher productivity as compared to scarfing and
milling.
Billet grinding wheels
are large wheels of 400mm diameter and above, up to
600 mm, Cold Pressed resinoid bond wheels are available
for speeds up to 48 m/s. These areused on swing frame
grinders with head leads up to 200 kgs. Hot Pressed
resinoid bond wheels are available for speeds of 45,
60 & 80 m/s.
These are used on automatic
billet grinding machines such as Centro maskin, Noritake
etc. with head loads of 1 ton.
The Hot Pressed Wheels
are manufactured with special Zirconia Alumina abrasives,
which facilitate very high stock removals.
Normal Speeds of operation:
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Cold Pressed Wheels
- 48 m/s
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Hot Pressed Wheels
- 56, 60 & 80 m/s
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Standard type: Type
1 only
SOME USEFUL HINTS:
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To obtain higher
stock removals, use softer grade, coarser grit wheels
and higher head loads.
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To obtain higher
wheel life, use hard grade wheels, increased traverse
speed and lower head loads.
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To obtain optimum
performance from the wheel, ensure constant peripheral
speed throughout useful life of wheel.
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For Hot Pressed
Wheels, ensure proper mounting with respect to bore
and spindle diameters to avoid breakage.
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