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A strip lay-out is made to determine the strip width and
pitch. The bridge width between the parts and the edge allowance
between the part and the edge of the strip have to be selected
to meet the following requirements:
a) the V-Ring has to have enough space
b) arrange for optimum usage of the material
c) the skeleton must have enough strength to allow feeding
the strip.
Complex contours or sections that require smooth edges, should
be located on the in-feed side of the strip (arrow) because
the solid strip is more rigid than the bridge between the
parts.
An edge allowance that is smaller than indicated in the table
below can be selected if the edge allows die break or if the
section that runs parallel to the edge of the strip is shorter
than 5 x stock thickness (L < 5s).
The optimum pitch, i.e. the smallest possible bridge width
can be determined in tests. Very often the V-Rings can overlap
without a negative effect on the surface quality of the sheared
edge. |
Strip Lay-out
