Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Frictionally engaging sides of opening in work
Patent
1988-10-19
1990-06-05
Bilinsky, Z. R.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Frictionally engaging sides of opening in work
408211, 408224, B23B 516
Patent
active
049309463
ABSTRACT:
A chamfering reamer for reaming the inside diameter of pipe or conduit comprises a generally cylindrical body having a truncated conical forward end to be received within the inside diameter of a pipe or conduit and a rearward end adapted to be secured in a chaser holder of a threading machine and a plurality of longitudinal flutes extending rearwardly from the forward end defining a plurality of circumferentially spaced longitudinal wings. Each wing has a conical reaming portion to ream the interior diameter at the end of the pipe or conduit and a conical trip shoulder extending from the conical reaming portion to the outer surface of each wing to activate the chaser holder to release the chamfered piece and provide clearance between the end surface of the pipe or conduit being reamed. Another embodiment for simultaneously reaming interior and exterior diameters has a body with the above described features which removably receives a hollow cylindrical sleeve having forwardly extending projections in circumferential alignment with the wings. Each projection has a reaming surface extending inward in opposed relation to the conical reaming portion of the wing to form a plurality of rearwardly extending generally V-shaped, angular bottom grooves which simultaneously ream the interior and exterior diameters at the end of the pipe or conduit. Another embodiment has replaceable inserts on the leading edge of the wing portions.
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Bilinsky Z. R.
Roddy Kenneth A.
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