Cutting – By endless band or chain knife – With special blade guide means
Patent
1996-07-19
2000-07-04
Dexter, Clark F.
Cutting
By endless band or chain knife
With special blade guide means
83661, 83676, 83821, 384 12, 384121, B26D 154, B27B 529, B27B 1310
Patent
active
060822392
ABSTRACT:
A saw having a self-pumped hydrodynamic blade guide or bearing for retaining the saw blade in a centered position in the saw kerf (width of cut made by the saw). The hydrodynamic blade guide or bearing utilizes pockets or grooves incorporated into the sides of the blade. The saw kerf in the workpiece provides the guide or bearing stator surface. Both sides of the blade entrain cutting fluid as the blade enters the kerf in the workpiece, and the trapped fluid provides pressure between the blade and the workpiece as an inverse function of the gap between the blade surface and the workpiece surface. If the blade wanders from the center of the kerf, then one gap will increase and one gap will decrease and the consequent pressure difference between the two sides of the blade will cause the blade to re-center itself in the kerf. Saws using the hydrodynamic blade guide or bearing have particular application in slicing slabs from boules of single crystal materials, for example, as well as for cutting other difficult to saw materials such as ceramics, glass, and brittle composite materials.
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Blaedel Kenneth L.
Davis Pete J.
Landram Charles S.
Carnahan L. E.
Dexter Clark F.
The Regents of the University of California
Thompson Alan H.
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