Patent ID: 8033767
Filing Date: 2011-10-11
Classification: B22D,B23D,B23P,F28D,F28F,Y10T

Abstract:
1. A method of improving a centrifugally-cast tube comprising a plurality of grooves and bosses each having a predetermined profile in an internal face of the tube and produced by cutting tools mounted on a shaft passing through a bore of the tube, the method comprising: passing one or more convex assemblies of cutting tools having only a plurality of cutting inserts with a convex profile for forming the grooves, the one or more convex assemblies comprising successive convex cutting tools of increasing dimensions that are passed through the bore of the tube until the predetermined profile of grooves is achieved; and passing one or more concave assemblies of cutting tools having only a plurality of cutting inserts with a concave profile for forming the bosses, the one or more concave assemblies comprising successive concave cutting tools of increasing dimensions that are passed through the bore of the tube until the predetermined profile of bosses is achieved.