Making of pilger roll

Apparatus for grinding the groove in a roll for pilger rolling, including a machine stand;

• first means for supporting the roll on the stand and including means for rotating such a roll about a first axis;
• a grinding wheel;
• second means for supporting the grinding wheel on the the stand, the grinding wheel rotating about a second axis;
• means for moving the second and first means in relation to each other and in relation to three perpendicular coordinate axes, a first one of which is parallel to the first axis, and the two others are at right angles to the first axis, whereby a second one of the coordinate axis runs in a direction commensurate to movement of the second axis towards or away from the first axis as defined by the first means, and a third one of the three coordinate axes is perpendicular to the first and second coordinate axes, to position the wheel relative to the groove, to thereby establish a particular work point, in which the wheel engages the groove of the roll as supported by the first means;
• first control means for causing the means for moving to move the first and second means in relation to each other in directions of the first and second coordinate axes;
• second control means for the means for moving, operatively connected to the means for moving and to the means for rotating, to respectively shift the first and second means in a direction of the third coordinate axis and to correctively rotate the roll as supported, for positioning the roll as supported by the first means and the wheel in relation to each other so that the roll as supported by the first means has a position in which its axis is pivoted out of a plane through the axis of the wheel and the work point;
• and
• means for tilting the grinding wheel about an axis parallel to the second coordinate axis out of a position of parallelism of its axis with the axis of the roll as supported by the first means.