Oval manway facing machine

摘要

A machine tool for re-surfacing gasket seats surrounding elliptical openings in oval manways includes a housing of an oval configuration that is adapted to be mounted in the opening of the manway to be machined. A motor and a tool slide assembly are secured to the motor mount in such a fashion that the tool slide assembly is confined to travel in an oval orbit along a second major surface of the housing. A cam actuated feed screw is appropriately disposed to engage a tripper bar disposed in the path of travel to effect radial displacement of a tool holder and tool bit. A cam locking and unlocking control lever cooperates with the cam and is disposed such that an operator located outside of the vessel on which the manway is disposed can readily control the machining operation.