Method and apparatus for producing fractured chips when performing a turning operation
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United States of America Patent
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-
May 28, 1991
Grant Date -
N/A
app pub date -
Jun 8, 1989
filing date -
Jun 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The feed advance speed, or rather its scalar value, of a turning cutting tool edge is varied for a time duration which is short relative to the time duration required for one full revolution of a work piece. The varying of the scalar value of the feed advance speed takes place at non-periodic timed intervals and at least once for each work piece revolution. Thus, a simple control not requiring any enforced phase relationship between tool movements during different revolutions of the work piece, can be applied to a computer numerically controlled machine tool, such a lathe for truing railroad wheels. A work piece surface is achieved which has at least the quality of conventional work piece surfaces produced with substantially more complicated phase controls for the tool movement. Positive chip fracture is also achieved.
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