Method and apparatus for simultaneously boring and turning upset pipe end
AssigneeFairfield Machine Company
InventorAlex Shashaty
Life of this patent
Estimating the term…
Abstract
The inside diameter and outside diameter of an upset pipe end are simultaneously bored and turned respectively by a combination tool. Boring and cutting elements on the tool are simultaneously disengaged from the pipe end in a controlled manner to taper out the cuts and permit rapid retraction of the tool without contacting the finished surfaces and possibly producing a scratch mark.
Claims8
A combination boring and turning machine for upset pipe ends comprising, a support frame, a spindle journaled for rotation on its axis in said frame, a motor in rotary driving engagement with said spindle, a pipe end inside boring head axially aligned with and secured to one end of said spindle, a pipe end outside turning head secured to said one end of said spindle and coaxially positioned over said boring head for clearance therebetween to coaxially receive a pipe end for simultaneous boring and turning said boring head having a plurality of circumferentially spaced pipe end boring tools and said turning head having a plurality of circumferentially spaced pipe end turning tools respectively, and means to retract said boring tools radially inward out of boring engagement with a pipe end and to retract said turning tools radially outward out of turning engagement with the same pipe end simultaneously.
A method of simultaneously boring and turning an upset pipe end comprising the steps of, clamping a pipe in axial alignment with an axially rotating combination ID-OD pipe end boring-turning head having respective ID and OD cutters in preparation for boring and turning an upset end of the pipe, axially engaging said rotating combination head and said pipe end and thereby simultaneously boring and turning a portion of said upset pipe end, thereafter simultaneously retracting the ID cutters radially inward and the OD cutters radially outward out of engagement with said pipe end, and then axially separating said combination head and said pipe end.
Dependencies are inferred from the claim text.