Method and apparatus for machining pipe collars

Details Method and apparatus for machining pipe collars Method and apparatus for machining pipe collars

1979-03-12

1981-01-13

Combs, Ervin M.

B23G 104, B23G 122

Patent

active

042440688

ABSTRACT:
A method and apparatus for machining pipe collars having internally tapered coaxial threads is accomplished by providing spaced sets of threading teeth on one side of a tool support bar of the numerically controlled machine with the spaced sets of threading teeth being oriented in generally parallel relation with the longitudinal axis of the tool support bar. The spaced sets of threaded teeth are then moved through the rotating collar by the tool support bar, following the desired internal taper with the orientation of the sets of thread forming teeth remaining substantially parallel with the axis of the tool support bar and the tool support bar being maintained in substantially parallel relation with the axis of the collar being formed. The sets of threading teeth form respective ones of the threaded tapers while the opposite set of thread forming teeth trace but remain clear of the thread being formed.

REFERENCES:
patent: 1958530 (1934-05-01), Bogart
patent: 3262140 (1966-07-01), Takagi et al.

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