Device for fracture-splitting a workpiece
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United States of America Patent
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Nov 4, 2003
Grant Date -
Jun 13, 2002
app pub date -
Sep 27, 2001
filing date -
Apr 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a device for fracture-separating a workpiece comprising several ring-shaped workpiece sections which are aligned axially one behind the other. The device comprises at least one expansion device which can be introduced axially into a borehole, formed in each ring-shaped workpiece section and has at least one expansion element that can be expanded in at least two axial expansion areas which lie at a distance from each other in the axial direction. The expansion device is provided with an integrated expansion control device which interacts with the expansion element for controlling a variable position and/or a variable expansion distance and/or a variable expansion period and/or a variable expansion sequence of at least the two expansion areas.
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