Adjustable boring bar with improved accuracy

Details Adjustable boring bar with improved accuracy Adjustable boring bar with improved accuracy

1994-07-25

1995-07-11

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool-support with means to permit positioning of the tool...

Pivotable tool

408150, B23B 2700

Patent

active

054315131

ABSTRACT:
An adjustable boring bar assembly is provided in which the cutting radius can be altered by predetermined increments simply by releasing and turning the bar within a sleeve of a hydraulic holder. The holder sleeve is slightly eccentrically located relative to the spindle axis, so that turning of the bar effectively changes the working radius of the cutting point. Slots on the holder, arrayed about the sleeve, are located at discrete angular positions to produce the desired radial increments. A pin on the boring bar disengages from one slot and re seats in another when the bar is released, withdrawn, turned, reinserted and re-gripped.

REFERENCES:
patent: 2289069 (1942-07-01), Radermacher
patent: 2676501 (1954-04-01), North
patent: 2693965 (1954-11-01), Briney, Jr.
patent: 3961857 (1976-06-01), Koblesky
patent: 4396319 (1983-08-01), Miles
patent: 4507027 (1985-03-01), Adamson et al.
patent: 4582457 (1986-04-01), Belttari
patent: 4619564 (1986-10-01), Jacobson
patent: 4773801 (1988-09-01), Noggle
patent: 4850757 (1989-07-01), Stashko
patent: 5193950 (1993-03-01), Hunt

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