Roll machining apparatus

Abstract

There is provided a roll machining apparatus which can accurately support a roll by means of hydrostatic bearings while absorbing thermal expansion of the roll in the length direction e.g. due to a change in room temperature, thus enhancing the machining precision. The roll machining apparatus for machining the surface of a roll while supporting and rotating the roil in a horizontal position, includes: a first spindle to be detachably coupled to one end of the roll; a second spindle, disposed opposite to the first spindle on the same axis, to be detachably coupled to the other end of the roll; a first hydrostatic radial bearing for receiving the radial load of the first spindle and rotatably supporting the first spindle; a hydrostatic thrust bearing for receiving the thrust load of the first spindle and limiting axial movement of the first spindle, a second hydrostatic radial bearing for receiving the radial load of the second spindle and rotatably supporting the second spindle; and a floating thrust having a thrust bearing for receiving the thrust load of the second spindle, said thrust being capable of selectively limiting and permitting axial movement of the thrust bearing.

Dependencies are inferred from the claim text.