Patent ID: 8342911

Claim:
A wheel truing apparatus adapted for use in a cylindrical grinding machine wherein a work table provided with a work head with a work spindle and a tail stock for support of a workpiece, and a wheel head with a grinding wheel for grinding the workpiece, are mounted on a bed for respective relative movement in a Z-axis direction parallel with the rotation axis of the work spindle and in an X-axis direction intersecting the Z-axis direction, and a transfer device is provided above the work spindle, wherein the wheel truing apparatus comprises a rotary drive portion mounted on the work head or the work table, and a wheel truing tool supported on the rotary drive portion for rotation therewith, the wheel truing tool being provided at its outer periphery with a truing portion for truing a grinding surface of the grinding wheel brought into contact therewith, wherein the rotary drive portion is placed in a position adjacent to said work head in a tooling area in the Z-direction, the tooling area being defined between said work head and said tail stock in the Z-axis direction, and wherein the rotary drive portion is spaced radially downward from said work spindle to avoid interference with the transfer device provided above the work spindle, and wherein the rotary drive portion is arranged such that the rotation axis line of said truing tool is oriented perpendicular to the rotation axis line of said grinding wheel in a condition where said truing portion is placed in contact with the grinding surface of said grinding wheel, whereby the truing portion of said truing tool may be brought into contact with the grinding surface of said grinding wheel by relative movement of said wheel head to said work head.