Boring device

Details Boring device Boring device

1987-08-06

1988-09-13

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Including means to cause tool to progressively vibrate...

74 22R, 173104, 173123, B23B 4734

Patent

active

047705698

ABSTRACT:
A boring device has a spindle moving mechanism which retards a tool spindle when the spindle rotates through a predetermined angle. The mechanism has coaxial first and second thrust rings. Thrust balls are disposed between the thrust rings in rolling contact therewith. A retaining element holds the thrust balls such that they keep constant circumferential spaces therebetween. The first thrust ring is fixed to the tool spindle and has recesses in the surface facing the second thrust ring. The second thrust ring is fixed to the casing of the boring device. As the first thrust ring is rotated by the tool spindle, the thrust balls are fitted in the respective recesses, whereby the tool retards by the amount equal to the depth of the recesses. Then, cutting edges of a cutter is separated from the face of a workpiece which is being cut, and a continuous chip is broken into pieces having a predetermined length and is removed from a hole being formed.

REFERENCES:
patent: 2412211 (1946-12-01), Eichelman
patent: 2458929 (1949-01-01), Clark
patent: 2514758 (1950-07-01), Hallden
patent: 2514759 (1950-07-01), Hallden
patent: 2515539 (1950-07-01), Wichman
patent: 2521900 (1950-09-01), Clark
patent: 2869402 (1959-01-01), Bunnell
patent: 3028771 (1962-04-01), Bunnell

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