Method of cutting workpieces having low thermal conductivity

Details Method of cutting workpieces having low thermal conductivity Method of cutting workpieces having low thermal conductivity

B - Operations, Transporting

26

F

B26F 1/26 (2006.01) B24C 1/00 (2006.01) B24C 1/04 (2006.01) B26F 3/00 (2006.01)

Patent

CA 2050220

A method of cutting and severing any portion of a nonferrous workpiece having a thickness generally equal to or less than .90 inches and a thermal conductivity significantly less than metal. A focused jet of CO2 crystallites (density of .03-.4 g/cm3) and a gas, pressurized to at least 100 psi, is translated across the workpiece at a velocity of 250-1000 mm/sec, the jet having a converging focus (.1-.5 in2) substantially near the surface of said workpiece (i) to thermally embrittle the workpiece immediately surrounding said focus, and (ii) to fracture the workpiece at said focus by air pressure.

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