Drill with motor drive and feed

Details Drill with motor drive and feed Drill with motor drive and feed

1997-08-12

2000-02-29

Dang, Hoang

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

173 6, 173 11, E21B 600, E21B 4400

Patent

active

060297549

ABSTRACT:
A drilling device comprises a drive motor (22), which sets a tool (36) in rotation, and a feed motor (14) which axially displaces the tool. Load sensors (12, 18, 20, 24) detect not only the tool feedrate (V) but also at least two of the three parameters, tool feed force (F), tool torque (M) and tool speed (U). An evaluation and control unit (70) evaluates the above-mentioned parameters and via control units (38, 42) activates the drive motor (22) and the feed motor (14) in such a way that the tool feed force (F) and the tool speed (U) or the tool torque (M) assume values at which the tool feedrate (V) for a specific ground hardness (H) is maximized.

REFERENCES:
patent: 3593807 (1971-07-01), Klima
patent: 4354233 (1982-10-01), Zhukovsky et al.
patent: 4793421 (1988-12-01), Jasinski
patent: 5131475 (1992-07-01), Beney
patent: 5449047 (1995-09-01), Schivley, Jr.
patent: 5458207 (1995-10-01), Mattero
patent: 5704436 (1998-01-01), Smith et al.
patent: 5746278 (1998-05-01), Bischel et al.

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