As one of needs for paper machines increasing running speed is required. One way to realize high speed running, uniform roll production of the outer shell thickness is needed. Namely, inside diameter size precision is high, at the same time, there is not machining gap of central part.
Until recently, standard method of machining is honing after the inside diameter processing of the roll. By this method it is the limit of increasing of machine speed, caused by wobble.
So we have begun to develop a new technique in purpose for getting cylindrical precision and minimizing surface roughness.
At our company we have adopted a honing less processing from single side instead of the conventional processing from each side. And we have succeeded in producing the new machine, realized to product the roll with uniform wall thickness, increased cylindrical precision and obtained surface roughness.
As a result 50 microns of cylindrical precision was obtained for the roll (φ580 mm×5,765 mmL) and there is not gap at central part.
With this success we can obtain uniform wall thickness, it is expected that temperature unevenness is decreased at the time of cooling and heating, and equalization of the nip.
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