Tool driving or impacting – Work cleansing
Reexamination Certificate
2000-09-20
2001-04-24
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Work cleansing
C173S199000, C173S213000, C408S056000
Reexamination Certificate
active
06220369
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a tool spindle of a machine tool, more particularly to a scrap removing and tool cooling device adapted to blow cooling air to the vicinity of a front holding end of a tool spindle so as to blow off scrap and to cool a tool insert held on the front holding end.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional holding device for a machine tool is shown to include a housing
1
, and a tool spindle
2
which is rotatably mounted in the housing
1
and which has a front holding end
3
that protrudes outwardly of the housing
1
for holding a tool insert
4
.
When the tool insert
4
rotates at a high speed during the operating process, scrap is usually produced and accumulates on the tool insert
4
and the front holding end
3
. This condition is aggregated when cooling liquid is used to cool the tool insert
4
.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a scrap removing and tool cooling device which is adapted to blow cooling air to the vicinity of the front holding end of the tool spindle of the machine tool so as to blow off scrap and to cool a tool insert held on the front holding end.
According to this invention, the scrap removing and tool cooling device includes a cooling air conduit which is adapted to be disposed in a housing of a machine tool and which extends in an axial direction parallel to a tool spindle of the machine tool. The cooling air conduit includes an inlet which is adapted to be formed in a surrounding wall of the housing for introducing cooling air therein, and an outlet which is adapted to pass through a front end wall of the housing. A hood member includes a rear surrounding wall which is adapted to engage the front end wall of the housing and which extends to surround and be spaced apart from a front holding end of the tool spindle with a first distance in a direction radial to the axial direction so as to cooperate with the front end wall to define a chamber to communicate with the outlet, and a front surrounding wall which extends forwardly from the rear surrounding wall and which is adapted to surround and be spaced apart from the front holding end with a second distance in the radial direction and smaller than the first distance so as to cooperate with the front holding end to define a blowing outlet to communicate with the chamber. As such, during the operating process, cooling air can be introduced into the cooling air conduit from the inlet, and flows towards the chamber via the outlet for eventual discharge at the blowing outlet, thereby cooling a tool insert mounted on the front holding end, and thereby blowing off scrap on the front holding end and the tool insert.
REFERENCES:
patent: 3608648 (1971-09-01), Dibble, Jr.
patent: 4034816 (1977-07-01), Lutich et al.
patent: 4293251 (1981-10-01), Anderson
patent: 4387775 (1983-06-01), Adolfsson et al.
patent: 4487271 (1984-12-01), Pomeroy et al.
patent: 4520879 (1985-06-01), MacElvain
patent: 4624339 (1986-11-01), Marcel et al.
Smith Scott A.
Wells St. John Roberts Gregory & Matkin
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