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A grinding machine wherein a wheel support carrying a grinding wheel is moved along a straight path extending at an acute angle to an axis of rotation of a workpiece. For the subsequent simultaneous grindings of a cylindrical surface and a shoulder side surface perpendicular thereto of the workpiece

A grinding machine wherein a wheel support carrying a grinding wheel is moved along a straight path extending at an acute angle to an axis of rotation of a workpiece. For the subsequent simultaneous grindings of a cylindrical surface and a shoulder side surface perpendicular thereto of the workpiece, the position of a transverse table carrying the workpiece is adjusted in proportion to a designated finish diameter of the cylindrical surface. The position of a sizing device slidable in the axial direction of the workpiece is also adjusted in connection to the positional adjustment of the transverse table, so that a pair of feelers of the sizing device are engaged with the cylindrical surface at a position which is spaced by a designated distance from the shoulder side surface.

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A grinding machine for simultaneously grinding with a grinding wheel a cylindrical surface and a shoulder side surface perpendicular thereto of a workpiece, comprising: a bed; work support means slidable on said bed, for carrying said workpiece for rotation about an axis extending in the sliding dir

A grinding machine for simultaneously grinding with a grinding wheel a cylindrical surface and a shoulder side surface perpendicular thereto of a workpiece, comprising: a bed; work support means slidable on said bed, for carrying said workpiece for rotation about an axis extending in the sliding direction of said work support means; a wheel support carrying said grinding wheel and slidable on said bed for movement along a straight path extending at an acute angle to the rotational axis of said workpiece; first and second feed means connected to said work support means and said wheel support for moving the same on said bed, respectively; a sizing device having feeler means engageable with said cylindrical surface of said workpiece for measuring the diameter of said cylindrical surface; guide means for slidably guiding said sizing device in a direction parallel to the rotational axis of said workpiece; third feed means connected to said sizing device for moving the same along said guide means; and a positioning controller connected to said third feed means for controlling the same and including first calculation circuit means responsive to first input data indicative of a desired finish diameter of said cylindrical surface for calculating a cotangent component at said acute angle of said desired finish diameter, second calculation circuit means responsive to said first calculation circuit means and second input data indicative of a first distance spaced from said shoulder side surface for adding said cotangent component and said second input data to thereby obtain command data indicative of a second distance from an intersection at which the rotational axis of said workpiece intersects a line extending through the juncture between first and second surfaces of said grinding wheel in parallel relation with said straight path, said first and second surfaces of said grinding wheel corresponding, respectively, to said cylindrical and shoulder side surfaces of said workpiece, and control means responsive to said second calculation circuit means for controlling said third feed means to position said feeler means at a position which is spaced said second distance from said intersection.