Boring machine

Details Boring machine Boring machine

1985-07-23

1987-10-06

Sipos, John

Cutting by use of rotating axially moving tool

With randomly-actuated stopping means

Responsive to condition of tool or tool-drive

408 11, 408704, B23B 3900

Patent

active

046979646

ABSTRACT:
This invention is directed to a boring machine provided with a spindle supported rotatably in a spindle housing, a driving means for rotating the spindle, and a spindle feed mechanism supporting the spindle housing so that the spindle housing can be moved up and down. This boring machine includes a means for detecting the level of axial displacement of the spindle in boring motion with the detecting means not contacting the spindle, and a comparator for comparing the level of the actual axial displacement of the spindle or the thrust force applied thereto and corresponding to this displacement with a predetermined threshold level of axial displacement or a threshold level of thrust force. The spindle feed mechanism is controlled in response to the output from the comparator.

REFERENCES:
patent: 3612840 (1971-10-01), Stobbe
patent: 3754178 (1973-08-01), Dormehl
patent: 3942087 (1976-03-01), Maisch
patent: 4342528 (1982-08-01), Nozu
patent: 4346444 (1982-08-01), Schneider
patent: 4441059 (1984-04-01), Watanabe
patent: 4442389 (1984-04-01), Sawada
patent: 4442493 (1984-04-01), Wakai

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