Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.
The embodiments of the invention in which an exclusive
property or privilege is claimed are defined as follows:
1. In a machine tool having a rotatably and axially movable
spindle and means on said spindle for receiving a toolholder
and for clamping said toolholder thereto, an axial duct in said
toolholder for passage of coolant to a drilling or tapping
tool mounted in said toolholder, a conduit mounted adjacent
to said spindle for introduction of said coolant or lubricant
and means for coupling said conduit to said axial duct when
said toolholder is clamped in said spindle, the improvement
characterized by a probe on said toolholder having a gas duct
therethrough, said probe being dimensioned smaller than the
holes in the workpiece to be cleaned to allow said probe to be
inserted in said hole while still providing space between said
probe and said hole to allow chips and coolant to escape, said
gas duct being coupled to said axial duct, and means for forc-
ing a compressed gas through said conduit, coupling means,
axial duct and gas duct and out said probe to blow chips and
coolant out of the hole in a workpiece in which a probe is
inserted.
2. The machine tool according to claim 1, characterized in
that said toolholder is rotatably mounted in a block and where-
in said coupling means includes a rotary gland coupled between
said block and said toolholder, said axial duct being coupled
to said rotary gland, and also comprising a coupling tube in
said block coupled to said rotary gland and positioned to
mate with said conduit.
3. The machine tool according to claim 2, and also charac-
terized by a socket on the end of said conduit positioned to
mate with said coupling tube.
4. The machine tool according to claim 2 and also charac-
terized by latch means for latching said block and said tool-
holder in a predetermined relative position when said tool-
holder is not clamped in said spindle and means for releasing
said latch means when said toolholder is clamped in said
spindle.
5. In a machine tool having a rotatably and axially movable
spindle and means on said spindle for receiving a toolholder
and for clamping said toolholder thereto, the improvement
characterized by a first duct in said spindle, a second duct
in said toolholder positioned to mate with said first duct when
said toolholder is clamped to said spindle for passage of
coolant to a drilling or tapping tool mounted in said toolholder,
a probe on said toolholder having a gas duct therethrough, said
probe being dimensioned smaller than the holes in the workpiece
to be cleaned to allow said probe to be inserted in said hole
while still providing space between said probe and said hole to
allow chips and coolant to escape, said gas duct being coupled
to said second duct, and means for forcing a compressed gas
through said first duct, second duct, said gas duct and out
said probe to blow chips and coolant out of a hole in a work-
piece in which said probe is inserted.
6. The machine tool according to claim 5, and further charac-
terized by an insertion tube coupled to said first duct and
extending into the region occupied by said toolholder, said
insertion tube being positioned to enter said second duct when
said toolholder is clamped to said spindle to couple said
first duct to said second duct.
7. The machine tool according to claim 5 and also charac-
terized by means for forcing a coolant fluid through said
first duct.
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8. The machine tool according to claim 7 characterized in
that said means for forcing said compressed gas and coolant or
lubricant fluid through said first duct comprises a rotary
union coupled to said first duct, a source of compressed gas
coupled to said rotary union, a source of coolant fluid coupled
to said rotary union, and means for controlling application of
said compressed gas and coolant fluid to said rotary union.
9. The machine tool according to claim 7 characterized in
that there is an axial bore in said spindle and further com-
prising a drawbolt slidably mounted in said axial bore for
axial movement between a retracted position and an extended
position, an axial bore in said drawbolt which constitutes
said first duct, a rotary union coupled to the inner end of
said drawbolt and to said first duct therein, and wherein said
means for forcing compressed gas through said first duct com-
prises a source of compressed gas coupled to said rotary union
and valve means for controlling the application of said com-
pressed gas to said rotary union.
10. In a machine tool having a spindle and means on said
spindle for receiving a toolholder and for clamping said tool-
holder thereto, the improvement characterized by a first duct
in said spindle, a second duct in said toolholder positioned
to mate with said first duct when said toolholder is clamped
to said spindle, a hollow probe on said toolholder coupled to
said second duct, and means for forcing a compressed gas
through said first and second ducts and out of said probe
to blow chips and coolant out of holes in a workpiece in
which the probe is inserted, said probe being dimensioned
smaller than the holes in the workpiece to be cleaned to
allow said probe to be inserted in said hole while still
providing space between said probe and said hole to allow
chips and coolant to escape.
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11. The machine tool according to claim 10 and further charac-
terized by an insertion tube coupled to said first duct and ex-
tending into the region occupied by said toolholder, said in-
sertion tube being positioned to enter said second duct when
said toolholder is clamped to said spindle to coupled said
first duct to said second duct.
12. The machine tool according to claim 10 and also charac-
terized by means for forcing a coolant fluid through said
first duct.
13. The machine tool according to claim 12 characterized in
that said means for forcing said compressed gas and coolant
fluid through said first duct comprises a rotary union coupled
to said first duct, a source of compressed gas coupled to said
rotary union, a source of coolant fluid coupled to said rotary
union, and means for controlling application of said compressed
gas and coolant fluid to said rotary union.
14. The machine tool according to claim 10 characterized in
that there is an axial bore in said spindle and further com-
prising a drawbolt slidably mounted in said axial bore for
axial movement between a retracted position and an extended
position, an axial bore in said drawbolt which constitutes
said first duct, a rotary union coupled to the inner end of
said drawbolt and to said first duct therein, and wherein
said means for forcing compressed gas through said first duct
comprises a source of compressed gas coupled to said rotary
union and valve means for controlling the application of said
compressed gas to said rotary union.
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15. In a machine tool having a spindle and means
on said spindle for receiving a toolholder and for clamping
said toolholder thereto, the improvement characterized by
a first duct in said spindle, a second duct in said tool-
holder positioned to mate with said first duct when said
toolholder is clamped to said spindle, a hollow probe
on said toolholder coupled to said second duct, means
for forcing a compressed gas through said first and second
ducts and out said probe to blow chips and coolant out
of holes in a workpiece adjacent to said probe, and
an insertion tube coupled to said first duct and extend-
ing into the region occupied by said toolholder, said
insertion tube being positioned to enter said second
duct when said toolholder is clamped to said spindle
to couple said first duct to said second duct.
16. In a machine tool having a spindle and means
on said spindle for receiving a toolholder and for clamping
said toolholder thereto, the improvement characterized by
a first duct in said spindle, a second duct in said tool-
holder positioned to mate with said first duct when said
toolholer is clamped to said spindle, a hollow probe
on said toolholder coupled to said second duct, means
for forcing a compressed gas through said first and
second ducts and out said proble to blow chips and coolant
out of holes in a workpiece adjacent to said probe,
an axial bore in said spindle and further comprising
a drawbolt slidably mounted in said axial bore for
axial movement between a retracted position and an
extended position, an axial bore in said drawbold which
constitutes said first duct, a rotary union coupled
to the inner end of said drawbolt and to said first
duct therein, and wherein said means for forcing com-
pressed gas through said first duct comprises a source
of compressed gas coupled to said rotary union and valve
means for controlling the application of said compressed
gas to said rotary union.
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17. A method of forming a clean drilled or tapped hole in a
workpiece comprising:
providing a machine tool having a rotatably and axially
movable spindle and means on said spindle for receiving a tool-
holder and for clamping said toolholder thereto;
clamping said toolholder to said spindle;
mounting a drilling or tapping tool in said toolholder;
said tool having an axial duct therein;
drilling or tapping a hole in a worksite of a workpiece
with said tool;
feeding a fluid coolant through a conduit adjacent to
said spindle and through said axial duct to the worksite of
the workpiece;
mounting a probe on said toolholder having a gas duct
therethrough with said gas duct coupled to said axial duct said
probe being dimensioned smaller than the holes in the workpiece
to be cleaned to allow said probe to be inserted in said hole
while still providing space between said probe and said hole
to allow chips and coolant to escape disposing said probe adja-
cent to said worksite; and
forcing a compressed gas through said conduit, axial duct
and gas duct and out said probe to blow chips and coolant out
of said hole to leave a clean hole.