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    • 6. 发明专利
    • SUPPORT FOR LONG WORKPIECE
    • JPH06218641A
    • 1994-08-09
    • JP2733293
    • 1993-01-22
    • YASKAWA ELECTRIC CORP
    • MAEYAMA TOSHIYA
    • B23Q1/00B23Q1/38F16C32/06B23Q1/22
    • PURPOSE:To maintain the high revolution precision by suppressing the transmission of vibration from a base board by supporting one edge of a work by a journal consisting of a static pressure pneumatic beating, as for the constitution in which one edge of a long cylindrical work is caught by a chuck and the other edge is supported by a supporting mechanism. CONSTITUTION:In the application to the inside diameter cutting, one edge of a work 3 is installed on a main spindle 1 through a chuck 2, and a collar 4 which is previously worked with high precision is stop-fitted at the other edge of the work 3. Further, on the outer periphery of the collar 4, a journal 5 consisting of a radial static pressure pneumatic bearing which is coaxial with the revolution axis center of the chuck 2 is set oppositely, keeping a certain gap. The journal 5 is fixed on a base board through a supporting board 6. The static pressure pneumatic bearing is formed by supplying the pressurized air into the journal 5, and the top edge side of the work 3 is supported by the static pressure., Accordingly, by supporting the top edge of the work 3 in noncontact form, the influence of the temperature rise of the supporting part and the working precision is suppressed, and the high revolution precision is maintained.