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Automatic Air Drill Clamping Chuck

IP.com Disclosure Number: IPCOM000099712D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Trollmann, C: AUTHOR

Abstract

For automatically changing drill 1 in a drilling spindle 2, a wedge-shaped clamping chuck 3 is provided, as shown in the cross-sectional view of the figure. Wedge 4 is movable along longitudinal axis 5, clamping drill 1 during its downward movement in the arrow-marked direction 6. Clamping action is implied when air under pressure is introduced through tube 7 into air chamber 8. A cover plate 9 urges ring 10 to act immediately on wedge 4. As wedge 4, taking, for example, the form of a split ring arrangement, is moved downwards in the arrow-marked direction 6, it slides on slope 11 of counter cone 12. Thus, the inside 13 of wedge 4 is moved in the arrow-marked direction 14, clamping shaft 15 of drill 1.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 79% of the total text.

Automatic Air Drill Clamping Chuck

       For automatically changing drill 1 in a drilling spindle
2, a wedge-shaped clamping chuck 3 is provided, as shown in the
cross-sectional view of the figure.  Wedge 4 is movable along
longitudinal axis 5, clamping drill 1 during its downward movement in
the arrow-marked direction 6.  Clamping action is implied when air
under pressure is introduced through tube 7 into air chamber 8.  A
cover plate 9 urges ring 10 to act immediately on wedge 4.  As wedge
4, taking, for example, the form of a split ring arrangement, is
moved downwards in the arrow-marked direction 6, it slides on slope
11 of counter cone 12.  Thus, the inside 13 of wedge 4 is moved in
the arrow-marked direction 14, clamping shaft 15 of drill 1.

      Clamping chuck 3 is incorporated in spindle rotor 16 of
drilling spindle 2, being retained there by fixed counter cone 12.
Rotor 3 may be driven by any means, preferably using an air bucket
wheel (not shown).  The air from this wheel is guided through a
central hole tube 7 to air chamber 8.  Thus, clamping force is
automatically exerted on drill shaft 15 via wedge 4 only when air
driving force is applied to the rotor.  When the air pressure is
released from air chamber 8, flat springs 17, acting on the lower tip
18 of wedge 4, move the latter upwards in the direction 19. Confined
between upper flat spring 17 and recess 20 in the lower tip 18 of
wedge 4, an O-ring 21 is provided.  This flexible O-ring 21,
...