Straightening press for straightening concentricity or straightness errors on elongated workpieces with at least one helical region, such as on screw conveyors, in particular on extruder screws

摘要

Straightening press (20) for straightening concentricity or straightness errors on elongate workpieces comprising centering means (21A, 21B) and a workpiece (1) clamped between the centering means, which has at least one, at least one core diameter (Di) and at least one outside diameter (Da ), which comprises at least one helix (2) of the workpiece, such as a screw conveyor, in particular an extruder screw, with at least one, concentricity error of the workpiece detecting measuring head, characterized in that at least two in the area between the Spacing knives (10A, 10B) which are arranged so as to contact the centering means of the workpiece and are intended to detect the distances of surfaces of the workpiece from at least one reference point, the measuring points on the workpiece for the at least two distance knives in the axial direction of the workpiece in one, preferably fixed , Distance (a) from egg are arranged one another, the axial distance (a) of the at least two measuring points from one another is smaller than the pitch (s1, s2, s3) of the respective helix and greater than the width (b1, b2, b3) seen in the axial direction of the respective one helix (2).