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SPRING END
GRINDING
Spring end grinding of
compression
springs is a very common process associated with this type of
spring. In fact most compression springs are coiled with the
ends closed in and squared and the addition of the grinding
process enables the improvement of that squareness to facilitate
better location and function when in use. However we do not
recommend grinding compression springs where wire diameters are
smaller than 1.0mm in fact it is rare to see that, at this size,
the benefit would be fully realised. Different degrees of
squareness can be achieved from the grinding process and this
should be considered to be commensurate with the requirements of
the function. It is a relatively expensive process and there are
two main and distinct different grinding methods for spring end
grinding. The first “crash grinding”, the more traditional and
most common method, is on a machine where the grinding wheels
are set at specific distance apart and a paddle of unground
springs are forced between the wheels to remove the material.
The second “downfeed grinding” is where a paddle of unground
springs is rotating fairly quickly, and the rotating grinding
wheels are progressed down onto the ends of the springs to
remove the material. In general downfeed grinding is a slower
process but gives a better quality of ground end and squareness.
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