Pneumatic spindle with means to direct the bearing air towards the tool-holding collet
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United States of America Patent
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Sep 26, 2006
Grant Date -
Jun 16, 2005
app pub date -
Feb 4, 2003
filing date -
Feb 22, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A spindle (1) in which the moving part (2) fixed to the tool-holding collet (3) is supported by one or more aerostatic bushes (4) on cushions of air generated by a jet of compressed air that circulates continuously along the air gaps (5) between the aerostatic bushes (4) and the moving part (2) and passes out of the spindle (1) through the co-axial aperture (6) formed in a flange (7) through which the tool-holding collet (3) projects from the spindle (1). Directing elements (8) are attached to the outside of the flange (7) to collect the air passing out of the abovementioned aperture (6) and cause it to adopt an outward direction of motion (E) that is tangential to or incident on the terminal part (3t) of the tool-holding collet (3) and roughly parallel to the axis of the spindle (1).
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