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  The Wiper Die:
The function of a wiper die is to prevent wrinkles forming on the inside
of the bend.
you will find This is common when bending a 1D bend.
The material wiper
dies
are
made
from
will depend on the material to be bent. This item
also
plays a vital
role in the production of
bending
thin – wall tubing.
The
profile of the tube
should be precisely manufactured to a true form
within the
wiper.
The size and quality of the
profile
should permit the material to flow without
any
resistance. An oversize
profile
will allow the material to grow vertically and this
may cause
wrinkles, whilst a tight
profile
will cause drag, followed by clamp slippage.
this
should be avoided. A badly fitted wiper die will
probably
result in failure to achieve a wrinkle free bend and damage the
wiper
tip.
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