Cutting by use of rotating axially moving tool – With stopping upon completion of prescribed operation
Patent
1986-03-10
1988-06-21
Bilinsky, Z. R.
Cutting by use of rotating axially moving tool
With stopping upon completion of prescribed operation
10 96T, 408107, 408157, 408170, B23G 104, B23G 122
Patent
active
047521597
ABSTRACT:
A thread cutting apparatus and method are disclosed for the formation of tapered threads on the end of an elongated reinforcing bar of the type used in concrete structures. The apparatus includes a cutting head assembly having tool holder arms that are cantilevered outwardly from a face or barrier surface to effect cutting of the threads outwardly of the barrier so as to protect the guideways and cutting displacement structure control structure from chips and debris. The apparatus includes positive lead control for the thread cutting chasers, a rigid clamping structure for the bar and a fluid control assembly. The fluid control assembly is capable of positioning the cutting head and housing for one or a multiple number of frusto-conical cuts of predetermined depth to permit the simultaneous formation of threads and removal of material from the reinforcing bar end.
REFERENCES:
patent: 992903 (1911-05-01), Richmond
patent: 1409379 (1922-03-01), Hunziker
patent: 1650778 (1927-11-01), White
patent: 3169426 (1965-02-01), Renoux
patent: 3415552 (1968-12-01), Howlett
patent: 3850535 (1974-11-01), Howlett et al.
Bilinsky Z. R.
Howlett Machine Works
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